URL
stringlengths 15
1.68k
| text_list
sequencelengths 1
199
| image_list
sequencelengths 1
199
| metadata
stringlengths 1.19k
3.08k
|
---|---|---|---|
https://forums.codeguru.com/showthread.php?561323-RESOLVED-can-i-convert-a-string-into-a-math-expression&s=018621933292c4eef7a7a85aa6460096 | [
"CodeGuru Home VC++ / MFC / C++ .NET / C# Visual Basic VB Forums Developer.com\n\n# Thread: [RESOLVED] can i convert a string into a math expression?\n\n1.",
null,
"Senior Member",
null,
"Join Date\nApr 2009\nPosts\n1,333\n\n## [RESOLVED] can i convert a string into a math expression?\n\nsee these string:\n2+3 + 3*(5+5)\ncan i convert it to a math expression for calculate?",
null,
"",
null,
"Reply With Quote\n\n2.",
null,
"Member +",
null,
"",
null,
"",
null,
"Join Date\nFeb 2017\nPosts\n653\n\n## Re: can i convert a string into a math expression?",
null,
"Originally Posted by Cambalinho",
null,
"see these string:\n2+3 + 3*(5+5)\ncan i convert it to a math expression for calculate?\nThere is no standard function in C++ that does that (if available in a language it's often called eval).\n\nThe most famous algorithm for this purpose is the Shunting-yard algorithm (by Dijkstra),\n\nhttps://en.wikipedia.org/wiki/Shunting-yard_algorithm\n\nI'm sure you can locate a suitable implementation on the net.\nLast edited by wolle; April 2nd, 2018 at 03:31 AM.",
null,
"",
null,
"Reply With Quote\n\n3. ## Re: can i convert a string into a math expression?\n\nI have written math expressions' parser and evaluator in C++. It's a C++ wrapper class.\nWorks with 1, 2 variable, and thus can handle customized functions from 1,2 arguments for 2d and 3d processing.\nLet me know if you need such functionality in your application and I'll send you the sources.",
null,
"",
null,
"Reply With Quote\n\n4. ## Re: can i convert a string into a math expression?",
null,
"Originally Posted by Cambalinho",
null,
"see these string:\n2+3 + 3*(5+5)\ncan i convert it to a math expression for calculate?\nThese types of expressions are called infix and are not really suited for computer evaluation. To make them suitable, they are converted into postfix notation (also called reverse polish notation) which doesn't use brackets, the ordering is strict left to right and the operators come after the operands.\n\neg 3 + 4 * 5 infix becomes 3 4 5 * + postfix. (2 + 3) * (4 + 5) becomes 2 3 + 4 5 + * postfix. 2 + 3 + 3 * (5 + 5) infix becomes 2 3 + 3 5 5 + * + postfix. Postfix notation can be easily evaluated using a stack. Numbers are pushed onto the stack and when an operator is found, this is applied to the top 1 or 2 numbers (depending whether it is a unary or binary operator) which are popped from the stack and the result is pushed back to the stack. This is repeated until the end of the postfix expression. The result should be one number on the stack. If this is not true or there is stack underflow then there is an error in the postfix expression. To convert from infix to postfix, there are various methods of which Dijkstra's Shunting-yard is perhaps the most famous (see Wolle's post #2). Another common one is Recursive Descent parser (which is the method I prefer) see https://en.wikipedia.org/wiki/Recursive_descent_parser.\n\nPS if you use one you're found on the internet, make sure it's fit for your purpose - eg some don't handle unary minus correctly. eg -2 + -3 is a valid infix expression. Some only handle integers etc etc. Do you also need it to handle functions eg sin(), cos(), abs() etc etc.\nLast edited by 2kaud; March 31st, 2018 at 07:40 AM. Reason: PS",
null,
"",
null,
"Reply With Quote\n\n5.",
null,
"Senior Member",
null,
"Join Date\nApr 2009\nPosts\n1,333\n\n## Re: can i convert a string into a math expression?\n\nfinally i get results:\nCode:\n```#include <iostream>#include <string>\n#include <vector>\n#include <sstream>\n\nusing namespace std;\n\nclass MathOperators\n{\npublic:\n\nenum enumMathOperators\n{\nParenthesesOpen='(',\nParenthesesClose=')',\nMinus='-',\nMultiplication ='*',\nSpace=' ',\nDivision ='/'\n};\n\nstatic bool IsMathOperator(char enMath)\n{\nswitch(enMath)\n{\ncase ParenthesesOpen:\ncase ParenthesesClose:\ncase Minus:\ncase Multiplication:\ncase Space:\ncase Division:\nreturn true;\ndefault:\nreturn false;\n}\n}\n};\n\nvoid CalculateExpression(string strMathExpression){\n//clean empty spaces\nfor(unsigned int i=0; i<strMathExpression.size(); i++)\n{\nif(strMathExpression[i]== ' ' || strMathExpression[i]== '\\t')\n{\nstrMathExpression.erase(i,1);\ni=0;\n}\n}\n\n//spare the operator and numbers\n//for add them on a vector:\nstring strNumber=\"\";\nvector<string> vecOperator;\nint OperatorCount=0;\n\n//we must add a null string terminator\n//for we convert the char to string\n//or we can get unexpected results:\nchar chr[]={'0','\\0'};\nfor(unsigned int i=0; i<=strMathExpression.size() ; i++)\n{\nchr=strMathExpression[i];\nif(isdigit(chr))\n{\nstrNumber+=chr;\n}\nelse\n{\nif(isdigit(strNumber))\nvecOperator.push_back(strNumber);\nif( MathOperators::IsMathOperator(chr)==true)\n{\nvecOperator.push_back(chr);\nOperatorCount++;\n}\nOperatorCount++;\nstrNumber=\"\";\n\n}\n}\n\n//print actual vector:\nfor (unsigned int a=0; a<vecOperator.size();a++)\n{\ncout << vecOperator[a] << \" \";\n}\ncout << \"\\n\";\n\n//making the math:\nfor(unsigned int i=0;i<vecOperator.size(); i++)\n{\nif(vecOperator[i]==\"+\")\n{\n//get result in int:\nint result=stoi(vecOperator[i-1])+ stoi(vecOperator[i+1]);\n\n//get the result in int to string:\nvecOperator[i-1]= to_string(result);\n\n//erase the next 2 elements:\nvecOperator.erase(vecOperator.begin()+i,vecOperator.begin()+i+2);\n\n//print the elements after changes:\nfor (unsigned int a=0; a<vecOperator.size();a++)\n{\ncout << vecOperator[a] << \" \";\n}\ncout << \"\\n\";\n\n//before continue the i must be -1\n//when the for restart, the i will be 0:\ni=-1;\ncontinue;\n}\n\nelse if(vecOperator[i]==\"-\")\n{\nint result=stoi(vecOperator[i-1])- stoi(vecOperator[i+1]);\nvecOperator[i-1]= to_string(result);\nvecOperator.erase(vecOperator.begin()+i,vecOperator.begin()+i+2);\nfor (unsigned int a=0; a<vecOperator.size();a++)\n{\ncout << vecOperator[a] << \" \";\n}\ncout << \"\\n\";\ni=-1;\ncontinue;\n}\nelse if(vecOperator[i]==\"/\")\n{\nint result=stoi(vecOperator[i-1])/ stoi(vecOperator[i+1]);\nvecOperator[i-1]= to_string(result);\nvecOperator.erase(vecOperator.begin()+i,vecOperator.begin()+i+2);\nfor (unsigned int a=0; a<vecOperator.size();a++)\n{\ncout << vecOperator[a] << \" \";\n}\ncout << \"\\n\";\ni=-1;\ncontinue;\n}\nelse if(vecOperator[i]==\"*\")\n{\nint result=stoi(vecOperator[i-1])* stoi(vecOperator[i+1]);\nvecOperator[i-1]= to_string(result);\nvecOperator.erase(vecOperator.begin()+i,vecOperator.begin()+i+2);\nfor (unsigned int a=0; a<vecOperator.size();a++)\n{\ncout << vecOperator[a] << \" \";\n}\ncout << \"\\n\";\ni=-1;\ncontinue;\n}\n}\n}\n\nint main()\n{\nstring strExpression;\ngetline(cin, strExpression);\nCalculateExpression(strExpression);\nreturn 0;\n}```\nthe math is done correctly. can anyone give me 1 advice: how can i control the priory math?",
null,
"readers: don't forget see the way that i do the conversion from char array to string... it's very important add the '\\0'(string null terminator) for avoid unexpected results",
null,
"",
null,
"Reply With Quote\n\n6. ## Re: can i convert a string into a math expression?\n\nThis code doesn't use mathematical precedence. This evaluates 1 + 2 * 3 as 9 whereas it should be 7 as 1+ 2 * 3 should be evaluated as 1 + (2 * 3). Also it doesn't recognise parenthesis even though they are specified as an operator. There is an error in the 'clean empty space code' which anyhow would usually be done as a single statement\n\nCode:\n`\tstrMathExpression.erase(remove_if(strMathExpression.begin(), strMathExpression.end(), isspace), strMathExpression.end());`\nhow can i control the priory math\nYou implement an infix to postfix parser as per posts #2 and #4 - which requires a complete re-design of this code so no further comments.",
null,
"",
null,
"Reply With Quote\n\n7.",
null,
"Senior Member",
null,
"Join Date\nApr 2009\nPosts\n1,333\n\n## Re: can i convert a string into a math expression?\n\ni'm sorry... that line give me several compiler errors, that's why i use the for loop.\nerror: \"no matching function for call to 'remove_if(std::__cxx11::basic_string<char>::iterator, std::__cxx11::basic_string<char>::iterator, <unresolved overloaded function type>)' \"",
null,
"",
null,
"Reply With Quote\n\n8. ## Re: can i convert a string into a math expression?\n\nHave you got the required #include statements\n\nCode:\n```#include <algorithm>\n#include <cctype>\n#include <string>```",
null,
"",
null,
"Reply With Quote\n\n9.",
null,
"Senior Member",
null,
"Join Date\nApr 2009\nPosts\n1,333\n\n## Re: can i convert a string into a math expression?\n\nyes. but i'm using code blocks.. maybe that's why i get the errors",
null,
"",
null,
"Reply With Quote\n\n10. ## Re: can i convert a string into a math expression?\n\nthen consider\n\nCode:\n```for(unsigned int i = 0; i < strMathExpression.size();)\nif (strMathExpression[i] == ' ' || strMathExpression[i] == '\\t')\nstrMathExpression.erase(i,1);\nelse\n++i;```",
null,
"",
null,
"Reply With Quote\n\n11.",
null,
"Senior Member",
null,
"Join Date\nApr 2009\nPosts\n1,333\n\n## Re: can i convert a string into a math expression?\n\nbut can you give me an advice for control the operator priority?",
null,
"",
null,
"Reply With Quote\n\n12. ## Re: can i convert a string into a math expression?\n\nIt's beautiful code. Modern C++. Well commented. Tested. Use it and you may even learn something.\n...but doesn't work with negative numbers (unary minus). -1+2 gives -1946156963 !!",
null,
"PS. It also uses integer division. So 3/2*2 gives 2 but 2*3/2 gives 3 whereas mathematically these are the same and should give the same answer (3). Doh!!\nLast edited by 2kaud; April 1st, 2018 at 09:19 AM. Reason: PS",
null,
"",
null,
"Reply With Quote\n\n13.",
null,
"Member +",
null,
"",
null,
"",
null,
"Join Date\nFeb 2017\nPosts\n653\n\n## Re: can i convert a string into a math expression?",
null,
"Originally Posted by 2kaud",
null,
"...but doesn't work with negative numbers (unary minus). -1+2 gives -1946156963 !!",
null,
"PS. It also uses integer division. So 3/2*2 gives 2 but 2*3/2 gives 3 whereas mathematically these are the same and should give the same answer (3). Doh!!\nSorry, I remove this reference.",
null,
"",
null,
"Reply With Quote\n\n14. ## Re: can i convert a string into a math expression?\n\nThe original link for a shunting-yard c++ implementation was https://gist.github.com/t-mat/b9f681b7591cdae712f6 has issues including those discussed in post #12. There is also a fundamental implementation issue with the shunting for a right parenthesis which has been fixed below. Based upon this code, consider the following code which works with negative numbers and uses floating point rather than integer arithmetic. The main changes are in exprToTokens() which uses the type of the last token as a state indicator to determine whether the current token is valid or not. Also the evaluation code has been placed into eval() so that it is easier to use from within other code. Also eval() now returns a pair which indicates whether the eval() has been successful or not and if it has, the value. No error messages are now displayed. Note that the test code in main() requires c++17 - though it is fairly easy to convert it back to c++14 code.\n\nCode:\n```// Modified from https://gist.github.com/t-mat/b9f681b7591cdae712f6\n\n#include <algorithm>\n#include <iostream>\n#include <string>\n#include <vector>\n#include <deque>\n#include <cmath>\n#include <cctype>\n#include <utility>\n\nusing Mtype = long double;\n\nstruct Token {\nenum class Type {\nUnknown = 0,\nNumber,\nOperator,\nLeftParen,\nRightParen,\n};\n\nToken(Type t, const std::string& s, int prec = 1, bool ra = false)\n: type {t}, str(s), precedence {prec}, rightAssociative {ra}\n{}\n\nType type {Type::Unknown};\nstd::string str;\nint precedence = -1;\nbool rightAssociative = false;\n};\n\nstd::deque<Token> exprToTokens(const std::string& expr)\n{\nconst auto isnum = [](char ch) {return isdigit(ch) || (ch == '.');};\n\nstd::deque<Token> tokens;\nToken::Type lstok = Token::Type::Operator;\nint nopar = 0;\n\nfor (const auto *p = expr.c_str(); *p;)\nif (((lstok == Token::Type::Operator) || (lstok == Token::Type::LeftParen)) && (isnum(*p) || (((*p == '-') || (*p == '+')) && isnum(*(p + 1))))) {\nconst char* const b = ((*p == '-') || (*p == '+')) ? p++ : p;\n\nfor (; isnum(*p); ++p);\nlstok = Token::Type::Number;\nconst auto s = std::string(b, p);\n\nif (std::count(s.begin(), s.end(), '.') < 2)\ntokens.push_back(Token {lstok, s});\nelse\nreturn {};\n} else {\nint pr = -1;\t\t// precedence\nbool ra = false;\t// rightAssociative\n\nif (((lstok == Token::Type::LeftParen) || (lstok == Token::Type::Operator)) && (*p == '(')) {\nlstok = Token::Type::LeftParen;\n++nopar;\n} else\nif (((lstok == Token::Type::RightParen) || (lstok == Token::Type::Number)) && (*p == ')')) {\nlstok = Token::Type::RightParen;\n--nopar;\n} else\nif ((lstok == Token::Type::Number) || (lstok == Token::Type::RightParen)) {\nlstok = Token::Type::Operator;\nswitch (*p) {\ncase '^': pr = 4; ra = true; break;\ncase '*': pr = 3; break;\ncase '/': pr = 3; break;\ncase '+': pr = 2; break;\ncase '-': pr = 2; break;\ndefault: return {};\n}\n} else\nreturn {};\n\ntokens.push_back(Token {lstok, std::string(1, *p), pr, ra});\n++p;\n}\n\nreturn ((nopar == 0) && ((lstok == Token::Type::RightParen) || (lstok == Token::Type::Number))) ? tokens : std::deque<Token> {};\n}\n\nstd::deque<Token> shuntingYard(const std::deque<Token>& tokens)\n{\nstd::deque<Token> queue;\nstd::vector<Token> stack;\n\n// While there are tokens to be read:\nfor (auto token : tokens) {\nswitch (token.type) {\ncase Token::Type::Number:\n// If the token is a number, then add it to the output queue\nqueue.push_back(token);\nbreak;\n\ncase Token::Type::Operator:\n{\n// If the token is operator, o1, then:\nconst auto o1 = token;\n\n// while there is an operator token,\nwhile (!stack.empty()) {\n// o2, at the top of stack, and\nconst auto o2 = stack.back();\n\n// either o1 is left-associative and its precedence is\n// *less than or equal* to that of o2,\n// or o1 if right associative, and has precedence\n// *less than* that of o2,\nif (!((!o1.rightAssociative && o1.precedence <= o2.precedence) || (o1.rightAssociative && o1.precedence < o2.precedence)))\nbreak;\n\n// then pop o2 off the stack,\nstack.pop_back();\n// onto the output queue;\nqueue.push_back(o2);\n}\n\n// push o1 onto the stack.\nstack.push_back(o1);\n}\nbreak;\n\ncase Token::Type::LeftParen:\n// If token is left parenthesis, then push it onto the stack\nstack.push_back(token);\nbreak;\n\ncase Token::Type::RightParen:\n// If token is right parenthesis:\n{\nbool match = false;\n// Until the token at the top of the stack\n// is a left parenthesis,\n// pop operators off the stack\n// onto the output queue.\nwhile (!stack.empty() && stack.back().type != Token::Type::LeftParen) {\nqueue.push_back(stack.back());\nstack.pop_back();\nmatch = true;\n}\n\n// Pop the left parenthesis from the stack,\n// but not onto the output queue.\nstack.pop_back();\n\nif (!match && stack.empty()) {\n// If the stack runs out without finding a left parenthesis,\n// then there are mismatched parentheses.\n//std::cout << \"RightParen error (\" << token.str << \")\\n\";\nreturn {};\n}\n}\nbreak;\n\ndefault:\n//std::cout << \"Error (\" << token.str << \")\\n\";\nreturn {};\n}\n}\n\n// When there are no more tokens to read:\n// While there are still operator tokens in the stack:\nwhile (!stack.empty()) {\n// If the operator token on the top of the stack is a parenthesis,\n// then there are mismatched parentheses.\n\nif (stack.back().type == Token::Type::LeftParen) {\n//std::cout << \"Mismatched parentheses error\\n\";\nreturn {};\n}\n\n// Pop the operator onto the output queue.\nqueue.push_back(std::move(stack.back()));\nstack.pop_back();\n}\n\nreturn queue;\n}\n\nstd::pair<bool, Mtype> eval(const std::string& expr)\n{\nconst auto tokens = exprToTokens(expr);\nauto queue = shuntingYard(tokens);\nstd::vector<Mtype> stack;\n\nwhile (!queue.empty()) {\nconst auto token = queue.front();\nqueue.pop_front();\nswitch (token.type) {\ncase Token::Type::Number:\nstack.push_back(std::stold(token.str));\nbreak;\n\ncase Token::Type::Operator:\n{\nconst auto rhs = stack.back();\nstack.pop_back();\nconst auto lhs = stack.back();\nstack.pop_back();\n\nswitch (token.str) {\ndefault:\n//std::cout << \"Operator error [\" << token.str << \"]\\n\";\nreturn {false, 0};\ncase '^':\nstack.push_back(static_cast<Mtype>(pow(lhs, rhs)));\nbreak;\ncase '*':\nstack.push_back(lhs * rhs);\nbreak;\ncase '/':\nstack.push_back(lhs / rhs);\nbreak;\ncase '+':\nstack.push_back(lhs + rhs);\nbreak;\ncase '-':\nstack.push_back(lhs - rhs);\nbreak;\n}\n}\nbreak;\n\ndefault:\n//std::cout << \"Token error \" << (int)token.type << std::endl;\nreturn {false, 0};\n}\n}\n\nreturn (stack.size() != 1) ? std::make_pair(false, 0.0L) : std::make_pair(true, stack.back());\n}\n\nint main() {\n//std::string expr = \"20-30/3+4*2^3\";\t\t// Should give 42\n\nstd::cout << \"Enter expression :\";\nstd::string expr;\n\nstd::getline(std::cin, expr);\nexpr.erase(std::remove_if(expr.begin(), expr.end(), std::isspace), expr.end());\n\nif (auto [ok, res] = eval(expr); ok)\nstd::cout << \"Result : \" << res << std::endl;\nelse\nstd::cout << \"Error in expression\" << std::endl;\n\nreturn 0;\n}```\nExamples\n\nCode:\n```Enter expression :-1+-2*-3\nResult : 5\n\nEnter expression :20-30/3+4*2^3\nResult : 42\n\nEnter expression :3/2*2\nResult : 3\n\nEnter expression :(-7+(7^2-4*12)^.5)/2\nResult : -3```\nLast edited by 2kaud; April 7th, 2018 at 05:04 AM. Reason: Fixed issue with illegal terminating token",
null,
"",
null,
"Reply With Quote\n\n15.",
null,
"Member +",
null,
"",
null,
"",
null,
"Join Date\nFeb 2017\nPosts\n653\n\n## Re: can i convert a string into a math expression?",
null,
"Originally Posted by 2kaud",
null,
"The original link for a shunting-yard c++ implementation was https://gist.github.com/t-mat/b9f681b7591cdae712f6 has issues including those discussed in post #12.\nWell, I made a mistake to uncritically recommended the GitHub implementation but with your fixes it should be okay now so I recommend your version in #14.",
null,
"My advice to the OP really was that if this isn't a exercise it's much better to use an existing implementation. Expression parsing in practice quickly becomes very complicated as soon as you have to deal with more than just the very basic operators,\n\nhttp://en.cppreference.com/w/c/langu...tor_precedence\nLast edited by wolle; April 3rd, 2018 at 02:01 AM.",
null,
"",
null,
"Reply With Quote\n\n####",
null,
"Posting Permissions\n\n• You may not post new threads\n• You may not post replies\n• You may not post attachments\n• You may not edit your posts\n•"
] | [
null,
"https://forums.codeguru.com/images/statusicon/user-offline.png",
null,
"https://forums.codeguru.com/images/reputation/reputation_pos.png",
null,
"https://forums.codeguru.com/images/misc/progress.gif",
null,
"https://forums.codeguru.com/clear.gif",
null,
"https://forums.codeguru.com/images/statusicon/user-offline.png",
null,
"https://forums.codeguru.com/images/reputation/reputation_pos.png",
null,
"https://forums.codeguru.com/images/reputation/reputation_pos.png",
null,
"https://forums.codeguru.com/images/reputation/reputation_pos.png",
null,
"https://forums.codeguru.com/images/misc/quote_icon.png",
null,
"https://forums.codeguru.com/images/buttons/viewpost-right.png",
null,
"https://forums.codeguru.com/images/misc/progress.gif",
null,
"https://forums.codeguru.com/clear.gif",
null,
"https://forums.codeguru.com/images/misc/progress.gif",
null,
"https://forums.codeguru.com/clear.gif",
null,
"https://forums.codeguru.com/images/misc/quote_icon.png",
null,
"https://forums.codeguru.com/images/buttons/viewpost-right.png",
null,
"https://forums.codeguru.com/images/misc/progress.gif",
null,
"https://forums.codeguru.com/clear.gif",
null,
"https://forums.codeguru.com/images/statusicon/user-offline.png",
null,
"https://forums.codeguru.com/images/reputation/reputation_pos.png",
null,
"https://forums.codeguru.com/attachment.php",
null,
"https://forums.codeguru.com/images/misc/progress.gif",
null,
"https://forums.codeguru.com/clear.gif",
null,
"https://forums.codeguru.com/images/misc/progress.gif",
null,
"https://forums.codeguru.com/clear.gif",
null,
"https://forums.codeguru.com/images/statusicon/user-offline.png",
null,
"https://forums.codeguru.com/images/reputation/reputation_pos.png",
null,
"https://forums.codeguru.com/images/misc/progress.gif",
null,
"https://forums.codeguru.com/clear.gif",
null,
"https://forums.codeguru.com/images/misc/progress.gif",
null,
"https://forums.codeguru.com/clear.gif",
null,
"https://forums.codeguru.com/images/statusicon/user-offline.png",
null,
"https://forums.codeguru.com/images/reputation/reputation_pos.png",
null,
"https://forums.codeguru.com/images/misc/progress.gif",
null,
"https://forums.codeguru.com/clear.gif",
null,
"https://forums.codeguru.com/images/misc/progress.gif",
null,
"https://forums.codeguru.com/clear.gif",
null,
"https://forums.codeguru.com/images/statusicon/user-offline.png",
null,
"https://forums.codeguru.com/images/reputation/reputation_pos.png",
null,
"https://forums.codeguru.com/images/misc/progress.gif",
null,
"https://forums.codeguru.com/clear.gif",
null,
"https://forums.codeguru.com/images/icons/icon13.gif",
null,
"https://forums.codeguru.com/images/misc/progress.gif",
null,
"https://forums.codeguru.com/clear.gif",
null,
"https://forums.codeguru.com/images/statusicon/user-offline.png",
null,
"https://forums.codeguru.com/images/reputation/reputation_pos.png",
null,
"https://forums.codeguru.com/images/reputation/reputation_pos.png",
null,
"https://forums.codeguru.com/images/reputation/reputation_pos.png",
null,
"https://forums.codeguru.com/images/misc/quote_icon.png",
null,
"https://forums.codeguru.com/images/buttons/viewpost-right.png",
null,
"https://forums.codeguru.com/images/icons/icon13.gif",
null,
"https://forums.codeguru.com/images/misc/progress.gif",
null,
"https://forums.codeguru.com/clear.gif",
null,
"https://forums.codeguru.com/images/misc/progress.gif",
null,
"https://forums.codeguru.com/clear.gif",
null,
"https://forums.codeguru.com/images/statusicon/user-offline.png",
null,
"https://forums.codeguru.com/images/reputation/reputation_pos.png",
null,
"https://forums.codeguru.com/images/reputation/reputation_pos.png",
null,
"https://forums.codeguru.com/images/reputation/reputation_pos.png",
null,
"https://forums.codeguru.com/images/misc/quote_icon.png",
null,
"https://forums.codeguru.com/images/buttons/viewpost-right.png",
null,
"https://forums.codeguru.com/images/smilies/smile.gif",
null,
"https://forums.codeguru.com/images/misc/progress.gif",
null,
"https://forums.codeguru.com/clear.gif",
null,
"https://forums.codeguru.com/images/buttons/collapse_40b.png",
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.7272232,"math_prob":0.92913884,"size":21687,"snap":"2022-27-2022-33","text_gpt3_token_len":5679,"char_repetition_ratio":0.11977125,"word_repetition_ratio":0.31838837,"special_character_ratio":0.29801264,"punctuation_ratio":0.20630631,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.98538655,"pos_list":[0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130],"im_url_duplicate_count":[null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2022-08-12T00:35:29Z\",\"WARC-Record-ID\":\"<urn:uuid:ab92e9a3-c21b-482a-a380-e32da328a2a5>\",\"Content-Length\":\"156954\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:2ef7870e-b0b7-4065-a77c-b0937d87d0d3>\",\"WARC-Concurrent-To\":\"<urn:uuid:ea4e7bbb-ab05-4180-8ef1-7b752c49afc5>\",\"WARC-IP-Address\":\"52.14.197.103\",\"WARC-Target-URI\":\"https://forums.codeguru.com/showthread.php?561323-RESOLVED-can-i-convert-a-string-into-a-math-expression&s=018621933292c4eef7a7a85aa6460096\",\"WARC-Payload-Digest\":\"sha1:U3FU5XYBEMFKMKZ4HK4FCYSKQUBCGES7\",\"WARC-Block-Digest\":\"sha1:K34QNREGU2SHCMBDPG2UXUFJHMEQQ72S\",\"WARC-Identified-Payload-Type\":\"application/xhtml+xml\",\"warc_filename\":\"/cc_download/warc_2022/CC-MAIN-2022-33/CC-MAIN-2022-33_segments_1659882571536.89_warc_CC-MAIN-20220811224716-20220812014716-00062.warc.gz\"}"} |
http://lambda.jimpryor.net/git/gitweb.cgi?p=lambda.git;a=blob_plain;f=topics/week7_environments_and_closures.mdwn;hb=7f98aa5b7f740662593c87e0fe138c95a62ede85 | [
"One strategy for evaluating or interpreting terms avoids the tedious and inefficient _substituting_ we've become familiar with. Instead, when a variable becomes bound to a result value, we'll keep track of that binding in a separate scorecard, that we'll call an \"environment.\" This strategy has to introduce a new kind of structure, called a `Closure`, to handle binding to terms that have locally free variables in them. Let's see how this works. For exposition, I'll pretend that the code you're working with has primitive numbers in it, though [[the homework assignment|/exercises/assignment7]] doesn't. (But [[the fuller code|/topics/week7_untyped_evaluator]] it's simplified from does.) Now consider: term environment ---- ----------- (\\w.(\\y.y) w) 2 [] (\\y.y) w [w->2] y [y->w, w->2] In the first step, we bind `w` to the term `2`, by saving this association in our environment. In the second step, we bind `y` to the term `w`. In the third step, we would like to replace `y` with whatever its current value is according to our scorecard/environment. But a naive handling of this would replace `y` with `w`; and that's not the right result, because `w` should itself be mapped to `2`. On the other hand, in: term environment ---- ----------- (\\x w. x) w 2 [] (\\w. x) 2 [x->w] x [w->2, x->w] Now our final term _should_ be replaced with `w`, not with `2`. So evidently it's not so simple as just recursively re-looking up variables in the environment. A good strategy for handling these cases would be not to bind `y` to the term `w`, but rather to bind it to _what the term `w` then fully evaluates to_. Then in the first case we'd get:\n```term environment\n---- -----------\n(\\w.(\\y.y) w) 2 []\n(\\y.y) w [w->2]\ny [y->2, w->2]\n```\nAnd at the next step, `y` will evaluate directly to `2`, as desired. In the other example, though, `x` gets bound to `w` when `w` is already free. (In fact the code skeleton we gave you won't permit that to happen; it refuses to perform any applications except when the arguments are \"result values\", and it doesn't count free variables as such. As a result, other variables can never get bound to free variables.) So far, so good. But now consider the term: (\\f. x) ((\\x y. y x) 0) Since the outermost head `(\\f. x)` is already a `Lambda`, we begin by evaluating the argument `((\\x y. y x) 0)`. This results in: term environment ---- ----------- (\\f. x) (\\y. y x) [x->0] But that's not right, since it will result in the variable `x` in the head also being associated with the argument `0`. Instead, we want the binding of `x` to `0` to be local to the argument term `(\\y. y x)`. For the moment, let's notate that like this:\n```term environment\n---- -----------\n(\\f. x)1 (\\y. y x)2 []1 [x->0]2\n```\nNow, let's suppose the head is more complex, like so: (\\f. (\\x. f x) I) ((\\x y. y x) 0) That might be easier to understand if you transform it to: let f = (let x = 0 in \\y. y x) in let x = I in f x Since the outermost head `(\\f. (\\x. f x) I)` is already a `Lambda`, we begin by evaluating the argument `((\\x y. y x) 0)`. This results in:\n```term environment\n---- -----------\n(\\f. (\\x. f x) I)1 (\\y. y x)2 []1 [x->0]2\n```\nNow the argument is not itself any longer an `App`, and so we are ready to evaluate the outermost application, binding `f` to the argument term. So we get:\n```term environment\n---- -----------\n((\\x. f x) I)1 [f->(\\y. y x)2]1 [x->0]2\n```\nNext we bind `x` to the argument `I`, getting:\n```term environment\n---- -----------\n(f x)1 [x->I, f->(\\y. y x)2]1 [x->0]2\n```\nNow we have to apply the value that `f` is bound to to the value that `x` is bound to. But notice there is a free variable `x` in the term that `f` is bound to. How should we interpret that term? Should the evaluation proceed:\n```(\\y. y x1) x1 [x->I, ...]1 [x->0]2\ny x1 [y->I, x->I, ...]1 [x->0]2\nI I\nI\n```\nusing the value that `x` is bound to in context1, _where the `f` value is applied_? Or should it proceed:\n```(\\y. y x2) x1 [x->I, ...]1 [x->0]2\ny x2 [y->I, x->I, ...]1 [x->0]2\nI 0\n0\n```\nusing the value that `x` was bound to in context2, _where `f` was bound_? In fact, when we specified rules for the Lambda Calculus, we committed ourselves to taking the second of these strategies. But both of the kinds of binding described here are perfectly coherent. The first is called \"dynamic binding\" or \"dynamic scoping\" and the second is called \"lexical or static binding/scoping\". Neither is intrinsically more correct or appropriate than the other. The first is somewhat easier for the people who write implementations of programming languages to handle; so historically it used to predominate. But the second is easier for programmers to reason about. > In Scheme, variables are bound in the lexical/static way by default, just as in the Lambda Calculus; but there is special vocabulary for dealing with dynamic binding too, which is useful in some situations. As far as I'm aware, Haskell and OCaml only provide the lexical/static binding. Shell scripts, on the other hand, only use dynamic binding. If you type this at a shell prompt: `( x=0; foo() { echo \\$x; }; bar() { local x=1; foo; }; bar )`, it will print `1` not `0`. In any case, if we're going to have the same semantics as the untyped Lambda Calculus, we're going to have to make sure that when we bind the variable `f` to the value `\\y. y x`, that (locally) free variable `x` remains associated with the value `0` that `x` was bound to in the context where `f` is bound, not the possibly different value that `x` may be bound to later, when `f` is applied. One thing we might consider doing is _evaluating the body_ of the abstract that we want to bind `f` to, using the then-current environment to evaluate the variables that the abstract doesn't itself bind. But that's not a good idea. What if the body of that abstract never terminates? The whole program might be OK, because it might never go on to apply `f`. But we'll be stuck trying to evaluate `f`'s body anyway, and will never get to the rest of the program. Another thing we could consider doing is to substitute the `2` in for the variable `x`, and then bind `f` to `\\y. y 2`. That would work, but the whole point of this evaluation strategy is to avoid doing those complicated (and inefficient) substitutions. Can you think of a third idea? What we will do is have our environment associate `f` not just with a `Lambda` term, but also with the environment that was in place _when_ `f` was bound. Then later, if we ever do use `f`, we have that saved environment around to look up any free variables in. More specifically, we'll associate `f` not with the _term_: Lambda(\"y\", BODY) but instead with the `Closure` structure: Closure(\"y\", BODY, SAVED_ENV) where `BODY` is the term that constituted the body of the corresponding `Lambda`, and `SAVED_ENV` is the environment in place when `f` is being bound. (In this simple implementation, we will just save the _whole environment_ then in place. But in a more efficient implementation, we'd sift through it and only keep those bindings for variables that are free in `BODY`. That would take up less space.)"
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.90596336,"math_prob":0.94650275,"size":7045,"snap":"2019-43-2019-47","text_gpt3_token_len":1904,"char_repetition_ratio":0.13662831,"word_repetition_ratio":0.060606062,"special_character_ratio":0.30092263,"punctuation_ratio":0.13253012,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.98030365,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2019-11-18T08:12:17Z\",\"WARC-Record-ID\":\"<urn:uuid:8043e272-05fc-4c7f-b5c6-60e167e30966>\",\"Content-Length\":\"8729\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:6a0667e4-e723-46ac-b8e9-683ae352901d>\",\"WARC-Concurrent-To\":\"<urn:uuid:4d2361c0-6a3d-4907-8bef-e0e467c11c63>\",\"WARC-IP-Address\":\"45.79.164.50\",\"WARC-Target-URI\":\"http://lambda.jimpryor.net/git/gitweb.cgi?p=lambda.git;a=blob_plain;f=topics/week7_environments_and_closures.mdwn;hb=7f98aa5b7f740662593c87e0fe138c95a62ede85\",\"WARC-Payload-Digest\":\"sha1:DQISDTLRHU5756VBUK33DDNYKVWF73D2\",\"WARC-Block-Digest\":\"sha1:GH74WP3NT7HZEJLD5MJ4AFUWBZP7OMTG\",\"WARC-Identified-Payload-Type\":\"text/plain\",\"warc_filename\":\"/cc_download/warc_2019/CC-MAIN-2019-47/CC-MAIN-2019-47_segments_1573496669730.38_warc_CC-MAIN-20191118080848-20191118104848-00539.warc.gz\"}"} |
https://coursepivot.com/tutor-answers/why-is-the-adjusted-present-value-approach-appropriate-for-situations-with-a-changing-capital-structure/ | [
"# Why is the adjusted present value approach appropriate for situations with a changing capital structure?\n\nCategory:\n ▲ 0 ▼ ♥ 0 Why is the adjusted present value approach appropriate for situations with a changing capital structure?\nAnswer and Explanation",
null,
"Explanation The adjusted present value approach in valuation is appropriate in situations where the capital structure is not constant. In this method, the value of operations is calculated using t...\n\nExplanation\n\nThe adjusted present value approach in valuation is appropriate in situations where the capital structure is not constant. In this method, the value of operations is calculated using the unlevered cost of equity, which eliminates the effect of debt in the capital structure. Using the unlevered cost of equity helps in eliminating the effect of debt on the capital structure. By eliminating the impact of debt on the target company's shareholders, the acquiring company can easily capture the target company's risk.Since the effect of both equity and debt on the valuation is calculated separately, this method is appropriate for varied capital structure. First, the value of operations is calculated assuming that it is an all-equity firm. The effect of financial risk(tax shield) is then added to calculate the final value of operations.\n\nThe adjusted present value approach is calculated using the unlevered cost of equity, which eliminates the effect of debt in the capital structure. The total value of the tax shield is calculated separately. The total value of operations is the sum of unlevered value of operations and tax shield. Therefore, the adjusted present value method is suitable for variable capital structure.",
null,
""
] | [
null,
"https://coursepivot.com/wp-content/uploads/Review-q.png",
null,
"https://coursepivot.com/wp-content/uploads/course_pivot-t1.png",
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.9135208,"math_prob":0.9830157,"size":1471,"snap":"2023-40-2023-50","text_gpt3_token_len":269,"char_repetition_ratio":0.15541922,"word_repetition_ratio":0.2488889,"special_character_ratio":0.17471108,"punctuation_ratio":0.08,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9928629,"pos_list":[0,1,2,3,4],"im_url_duplicate_count":[null,null,null,null,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2023-10-02T08:13:34Z\",\"WARC-Record-ID\":\"<urn:uuid:e093352c-9018-46e9-a9b3-6b183db1960e>\",\"Content-Length\":\"63232\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:322fb427-8139-4573-88b6-06fd8cd2c00b>\",\"WARC-Concurrent-To\":\"<urn:uuid:8fad0532-e46b-4fa0-9119-5f4b53a25657>\",\"WARC-IP-Address\":\"104.21.67.118\",\"WARC-Target-URI\":\"https://coursepivot.com/tutor-answers/why-is-the-adjusted-present-value-approach-appropriate-for-situations-with-a-changing-capital-structure/\",\"WARC-Payload-Digest\":\"sha1:GMNA7CHC2YWDP5LP4LD5TDEKSHHGJHYR\",\"WARC-Block-Digest\":\"sha1:UXISJUCP3RDYXYSBGCVACMCIHHFVZQYD\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2023/CC-MAIN-2023-40/CC-MAIN-2023-40_segments_1695233510983.45_warc_CC-MAIN-20231002064957-20231002094957-00070.warc.gz\"}"} |
https://thedebateinitiative.com/2012/04/20/speed-of-light-accurate-value-inspired-by-a-single-verse-from-the-quran/ | [
"Islam\n\n# Speed of Light; Accurate value inspired by a single verse from the Quran!\n\nA little bit far from the traditional “Tafseer”, when a cosmologist finishes reading the verse Quran 32:5 “He [Allah] arranges [each] matter from the heaven to the earth; then it will ascend to Him in a Day, the extent of which is a thousand years of those which you count.” He wouldn’t miss the fabric of a physical model consisting of: Objects (Allah’s matters), Motion (from heaven to the earth; then it will ascend to him), Time/Duration (in a Day, the extent of which is a thousand years of those which you count), Distance and ultimately a derivable Velocity imbedded within the Holy verse!\n\nMoon and it’s orbiting motion around the earth being the instrument Allah had created to help mankind count the years and time, Quran 10:5 “It is He [Allah] who made the sun a shining light and the moon a derived light and determined for it phases – that you may know the number of years and account [of time]. Allah has not created this except in truth. He details the signs for a people who know” …One might suggest the following physical motion model/problem: What’s the velocity of an object that travels in ONE day a same distance the Moon travels in 1000 years?\n\nThis would immediately recall the simple formula (we learned in year 5 science) … Velocity = Distance / Time … In other words:\n\nV (km/s) = 1000 (years said by the verse) * 12 (laps/year) * Lunar Orbit Circumference (km/lap) / 1 day (said by the verse, in seconds, sidereal day)\n\nCalculating the Lunar Orbit Circumference:\n\nDistance = Velocity * Time\n\nThus; Lunar Orbit Circumference (km/lap) = Lunar Velocity (Relative to Earth) (km/hr) * Sidereal Month (day/lap) * 24 (hr/day)\n\nThe Moon is running in two courses at the same time. The first is around the Earth which is noticed by us. The second is around the Sun (following the Earth) which is not seen by us. Verse 32:5 is referring to 1000 Years relative to us (of those which you count) which are basically 12,000 Moon cycles around the Earth.\n\nIf you’re on board of an air plane you’ll walk 5 meters to the Toilet but to an observer on the ground you’ve already walked 20 km’s! What matters us is what relative to us, the 5 meters, that’s what we count while on board!\n\nTherefore; The Lunar Velocity (Relative to Sun) must be multiplied by the cosine of the Tangent Angle in order to eliminate the Earth orbiting the Sun effect and reduce the Lunar Velocity to what relative to us on Earth, just as inspired by verse 32:5\n\nTherefore; Lunar Velocity (Relative to Earth) = Lunar Velocity (Relative to Sun) * cos (Tangent Angle)\n\nWhere the Tangent Angle = 360 * (Sidereal Month/Sidereal Year)\n\nKnowing that:\n\nSidereal Month = 27.321661 (day/lap) given by NASA\n\nSidereal Year = 365.25636 (days/lap) given by NASA\n\nThen; cos(Tangent Angle) = 360 * (Sidereal Month/Sidereal Year) = cos(360 * (27.321661 / 365.25636)) = 0.89157\n\nRe-constructing all variables in one equation:\n\nLunar Orbit Circumference (km/lap) = Lunar Velocity (Relative to Sun) (km/hr) * cos (Tangent Angle) * Sidereal Month (day/lap) * 24 (hr/day)\n\nKnowing that:\n\nLunar Velocity (relative to Sun) = 3682.07 (km/hr) given by NASA\n\nAnd by substituting all terms in the equation:\n\nLunar Orbit Circumference (km/lap) = 3682.07 (km/hr) * 0.89157 * 27.321661 (day/lap) * 24 (hr/day)\n\nResulting; Lunar Orbit Circumference = 2,152,612.349 (km/lap)\n\nComing back to the main equation inspired by the verse 32:5;\n\nV (km/s) = 1000 (years said by the verse) * 12 (laps/year) * Lunar Orbit Circumference (km/lap) / 1 day (said by the verse, in seconds, sidereal day)\n\nKnowing that:\n\n1 Sidereal Day = 86164.0906 (seconds/lap) given by NASA\n\nAnd The Lunar Orbit Circumference = 2,152,612.349 (km/lap) as derived above\n\nAnd by substituting all terms in the equation:\n\nV (km/s) = 1000 * 12 * 2,152,612.349 (km/lap) / 86164.0906 (sec/lap) = 299,792.5 km/s = Speed of Light!!!!!!\n\nCategories: Islam\n\n### 3 replies »\n\n1.",
null,
"Farrukh says:\n\nit is amazing work Mashallah, it made me smile, i’ll verify it Inshallah.\n\n2.",
null,
"Farrukh says:\n\nhard to understand how you calculated circumference of moon, why not to do it with 2*pi*r formula? circumference given on websites is different from what you have calculated.\n\n3.",
null,
"Farrukh says:\n\nAfter reading similar things on other websites, I think this calculation and method that is being used here is totally wrong. if our 1000 year is equal to one day, then what about our 50,000 years equal to one day mentioned in another verse??\nfrom 1000 year verse, it seems like angels are much slower than speed of light. and from 50,000 years verse, it seems like angels are slightly slower than speed of light.\nand if they approach speed of light, then time will stop for them and it will be 9999999…. years for us."
] | [
null,
"https://1.gravatar.com/avatar/aa9bf7e63e100794061f32503936be1e",
null,
"https://1.gravatar.com/avatar/aa9bf7e63e100794061f32503936be1e",
null,
"https://1.gravatar.com/avatar/aa9bf7e63e100794061f32503936be1e",
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.9146733,"math_prob":0.9301763,"size":4604,"snap":"2021-04-2021-17","text_gpt3_token_len":1228,"char_repetition_ratio":0.12021739,"word_repetition_ratio":0.15974844,"special_character_ratio":0.28670722,"punctuation_ratio":0.105945945,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9786625,"pos_list":[0,1,2,3,4,5,6],"im_url_duplicate_count":[null,null,null,null,null,null,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2021-01-25T22:25:52Z\",\"WARC-Record-ID\":\"<urn:uuid:a9f1a833-09ce-44dd-8857-6fd8768e673e>\",\"Content-Length\":\"100626\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:65675b2a-d481-42be-9b3c-1cfb62dc3e36>\",\"WARC-Concurrent-To\":\"<urn:uuid:83dee3c7-b6de-4c2d-9095-98f581f8e27a>\",\"WARC-IP-Address\":\"192.0.78.25\",\"WARC-Target-URI\":\"https://thedebateinitiative.com/2012/04/20/speed-of-light-accurate-value-inspired-by-a-single-verse-from-the-quran/\",\"WARC-Payload-Digest\":\"sha1:A52A3W3CVYEOC3GP5O2VEO2RSZ4GTF6T\",\"WARC-Block-Digest\":\"sha1:Z4J3T7TXUYZJUPCM5S5FRHZW3T6MVDVX\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2021/CC-MAIN-2021-04/CC-MAIN-2021-04_segments_1610704792131.69_warc_CC-MAIN-20210125220722-20210126010722-00187.warc.gz\"}"} |
https://www.jviotti.com/notes/sequences | [
"# Sequences\n\nA sequence is a mathematical collection of objects in a particular order\n\nFor example: , in that order. A sequence can be seen as the total bijective function . Following this definition, we can access the element of a sequence using function application notation. Given , .\n\nThe empty sequence is defined as . Sequences are homogeneous. They must contain elements of the same type.\n\nIf is a set, then represents all the finite sequences of elements of , and its defined as: .\n\n## Basic Operations\n\n### Concatenation\n\nGiven sequences and , their concatenation is denoted as . Notice that . Of course, , and concatenation is an associative operation. It also follows that if , then and .\n\n### Filtering (or Restriction)\n\nGiven a sequence , the sequence represents all the elements of that are included in , preserving the ordering. For example, . Notice that given set , .\n\nFiltering the empty sequence always yields back the empty sequence: , and filtering any sequence by the empty set also yields the empty sequence: .\n\nApplying multiple restrictions over the same sequence is the same as restricting by the intersection of those sets. Given sequence and sets and , then .\n\nThe first element of a sequence is called its head. For example, given , , or alternatively . The head of the empty sequence is the empty sequence. Notice that , and that given a non empty sequence , then .\n\n### Tail\n\nThe tail of a sequence is a sequence containing all the original elements except for the first one. For example, given , then , or alternatively . Notice that for any sequence , , and .\n\n### Indexing\n\nSequences are indexed from 0 using square bracket notation. For example .\n\n### Prefix\n\nA sequence is a prefix of sequence if the elements if there is a sequence such that . For example: but . Notice that given any set , . Also, given a sequence , .\n\nIf follows that given any sequence , , and that . This operation is asymmetric: , and transitive: . Of course, if , then .\n\nAn easy way to check if a prefix expression holds is by checking that .\n\nNotice that if two sequences are prefixes of the same sequence, then one is the prefix of the other or viceversa: .\n\nThe operator may have an exponent, in which case is an n-prefix of if starts with and it has up to elements removed. For example: , , but . This operator is defined as . It follows that and that . Also notice that .\n\n### Cardinality\n\nSince a sequence is a relation from natural numbers to the sequence elements, we can re-use the cardinality notation from sets. Thus, , or .\n\n### Flattening\n\nA sequence containing other sequences might be flattened to a single sequence by using a ditributed version of the concatenation operator. Given , then .\n\n### Repetition\n\nA sequence to the power of is equal to the sequence concatenated to itself times. For example: .\n\n### Reverse\n\nGiven a sequence , its inverse is the same sequence from right to left: . Of course, , and . Also, . The reverse of a concatenation is equal to the reverse concatenation of the inverse: .\n\n### Star\n\nThe star sequence of a set is the infinite set of finite sequences made of elements from . More formally: . It follows that for any set , .\n\nMembership on a set can be expressed in terms of membership to the star sequence of the set: . Also, means that both and are members of the star of .\n\n### Count\n\nGiven a sequence , represents the amount of time is inside the sequence . For example: . Formally, is defined as .\n\n### Includes\n\nThe operation represents whether a sequence is contained within a sequence . For example: . Notice that not .\n\n### Interleaves\n\nA sequence is an interleave of sequences and if can be constructed by arbitrarily extracting elements from and in order. For example , and . Of course, it holds that .\n\nThis operation is defined like this:\n\n## Properties\n\n### Injection\n\nAn injective sequence is one where its elements don’t appear more than once. Remember that sequences are defined as functions whose range is the set of natural numbers, and therefore the functional definition of injection (one-to-one) holds: a sequence without duplicates is one where every natural number from the domain points to a different element."
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.9082973,"math_prob":0.9698912,"size":4125,"snap":"2023-40-2023-50","text_gpt3_token_len":865,"char_repetition_ratio":0.19631158,"word_repetition_ratio":0.010738255,"special_character_ratio":0.21745455,"punctuation_ratio":0.16997519,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9797606,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2023-09-22T19:34:36Z\",\"WARC-Record-ID\":\"<urn:uuid:7c0289ea-fc52-4ed8-9890-197e9508be6b>\",\"Content-Length\":\"435747\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:300b21d2-0762-4991-b8fb-810dc4d22c5a>\",\"WARC-Concurrent-To\":\"<urn:uuid:0bebe878-69a6-4440-9fbb-ad22a3deae68>\",\"WARC-IP-Address\":\"185.199.111.153\",\"WARC-Target-URI\":\"https://www.jviotti.com/notes/sequences\",\"WARC-Payload-Digest\":\"sha1:5LIL7WVNNGGS236SRSVUXLRGTPTSNEJY\",\"WARC-Block-Digest\":\"sha1:G24OTRPECMONSLLLJP4ID2DPUL4ACAMH\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2023/CC-MAIN-2023-40/CC-MAIN-2023-40_segments_1695233506421.14_warc_CC-MAIN-20230922170343-20230922200343-00792.warc.gz\"}"} |
https://xianblog.wordpress.com/2013/06/24/vanilla-is-russian/ | [
"## vanilla is Russian!",
null,
"Mark Girolami kindly sent me his Russian Roulette paper on handling intractable normalising constants toward exact-approximation MCMC schemes: “Playing Russian Roulette with Intractable Likelihoods”… I had heard Mark’s talk in Warwick last month but reading the paper (written jointly with Anne-Marie Lyne, Heiko Strathmann, Dan Simpson and Yves Atchadé) made me understand the method(s) much better. The idea is to use a series representation (that they call MacLaurin and that I would call Taylor, but this may be related to MacLaurin being Scottish, a good enough reason!) to get from an approximation of the normalising constant to an unbiased estimation of the inverse of this constant, via either a geometric or an exponential version. The infinite series is then truncated by the Russian roulette, a physics trick that relies on a stopping rule to ensure both unbiasedness and an almost surely finite number of terms.\n\nNow, some wee bit of whining and an explanation for the (apparently insane) post title: in our vanilla Rao-Blackwellisation paper, Randal Douc and I used fairly similar techniques to find an unbiased estimate of an inverse probability to Rao-Blackwellise Metropolis-Hastings outcomes. Namely, a geometric series representation of this inverse probability identical to (7) in the current paper and a truncation of the infinite summation of products using uniforms and indicators as in Russian Roulette… So, although we were unaware of this at the time, we were essenially using Russian Roulette! I am thus a tad disappointed to see our work not referenced in this paper and a wee more disappointed that it got under the radar in an important segment of the community! (Besides this omission, the many refernces to my (other) papers are much appreciated!)\n\nBack to the current paper, a first item of interest is that the geometrically tilted estimator can rely on a biased estimator of the intractable constant, still resulting in an unbiased estimator in the end. (See below about this!) Although this solution requires the availability of upper bounds on the ratio between the estimator and the missing constant, which obviously is a drag, this is a good incentive for the method. (This and the fact that it is always possible to turn it into a positive estimate.) The boundedness also allows for geometric Russian Roulette as in our vanilla Rao-Blackwellisation paper. As an aside, I find the presentation in Section 3.1 a mite too convoluted: using the identity",
null,
"$\\dfrac{f(y,\\theta)}{\\mathcal{Z}(\\theta)}=\\dfrac{f(y,\\theta)}{\\tilde{\\mathcal{Z}}(\\theta)}\\times c(\\theta)\\times\\dfrac{\\tilde{\\mathcal{Z}}(\\theta)}{c(\\theta)\\mathcal{Z}(\\theta)}$\n\nseems to me to be sufficient to justify the estimation via the geometric series without a call to tilted exponential families. The alternative based on an exponential auxiliary variable seems slightly less appealing to me. First because it requires an unbiased estimator of the intractable constant. Second, I do not see how this auxiliary variable can be generated, given that the rate parameter in the exponential is the intractable constant. Maybe I am missing the points by thousands of miles…. In an email exchange, Mark pointed out that both methods use unbiased estimates of the constant. However, the paper mentions twice that its estimators can start from some approximation of Z(θ) that is not necessarily unbiased. Thus, I wonder whether or not having an infinite sequence of independent estimators with the same distribution as the initial approximation could be enough.\n\nThe solution proposed in the paper (to deal with negative density estimates) is quite clever, turning the negatives into positives thanks to the sign function. I however wonder about the overall efficiency of the trick for two (minor?) reasons. The first reason for worry is that, when the density estimate is very negative, the exact value is likely to be close to zero, rather than very large. Turning the estimate into its positive counterpart puts undue weight on this value. The second reason for worry is that the final estimate, being a ratio of estimates, will be biased. Obviously, this is not damning as this happens at the estimation stage rather than during the MCMC stage…\n\nA mathematical worry about the series convergence proof in the Appendix: it seems to me that the telescopic argument in the proof only applies to convergent series as, otherwise, we could be considering a difference of two infinities… Another worry: I find the explanation at the top of page 5 somehow confusing: unless the notation is generic, the fact that p can be evaluated in",
null,
"$\\hat{\\pi}(\\theta,\\xi|y)=\\hat{p}(\\theta,\\xi|y)/Z(y)$\n\ndoes not make sense if the lhs is the estimate found in the previous page.\n\n### One Response to “vanilla is Russian!”\n\n1.",
null,
"Intractable likelihoods, unbiased estimators and sign problem | Statisfaction Says:\n\n[…] by Mark Girolami, Anne-Marie Lyne, Heiko Strathmann, Daniel Simpson, Yves Atchade, see also Xian’s comments on it. The motivation of the paper is slightly different than the one described above but the techniques […]\n\nThis site uses Akismet to reduce spam. Learn how your comment data is processed."
] | [
null,
"https://bearheartbakingco.files.wordpress.com/2010/02/cakeweb2wheel1.jpg",
null,
"https://s0.wp.com/latex.php",
null,
"https://s0.wp.com/latex.php",
null,
"https://secure.gravatar.com/blavatar/c97e6139e1af9c4d7e7fb0cad771e3eb",
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.92714816,"math_prob":0.897895,"size":4777,"snap":"2023-14-2023-23","text_gpt3_token_len":984,"char_repetition_ratio":0.12319296,"word_repetition_ratio":0.0,"special_character_ratio":0.1909148,"punctuation_ratio":0.087759815,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9722505,"pos_list":[0,1,2,3,4,5,6,7,8],"im_url_duplicate_count":[null,6,null,null,null,null,null,null,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2023-06-05T16:26:40Z\",\"WARC-Record-ID\":\"<urn:uuid:35e88a64-e2d4-4237-bb19-2f11c14aef7b>\",\"Content-Length\":\"67275\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:ac1bd6d9-43bf-4bdd-8430-b83b0d222d79>\",\"WARC-Concurrent-To\":\"<urn:uuid:f261cbc7-8a56-427a-9b77-4b1d7fdad76a>\",\"WARC-IP-Address\":\"192.0.78.13\",\"WARC-Target-URI\":\"https://xianblog.wordpress.com/2013/06/24/vanilla-is-russian/\",\"WARC-Payload-Digest\":\"sha1:7VUSK4D6U2KKUIAV7LYVLCUGPNWEN6WM\",\"WARC-Block-Digest\":\"sha1:HIUPNM327JU3DU3CNDJ6YLWDZFVCNIV3\",\"WARC-Identified-Payload-Type\":\"application/xhtml+xml\",\"warc_filename\":\"/cc_download/warc_2023/CC-MAIN-2023-23/CC-MAIN-2023-23_segments_1685224652149.61_warc_CC-MAIN-20230605153700-20230605183700-00219.warc.gz\"}"} |
https://clientebancario.bde.es/pcb/en/menu-horizontal/podemosayudarte/simuladores/calculo-de-la-tae-de-un-prestamo-hipotecario.html | [
"# Calculate the APR of a mortgage\n\nCalculate the APR of your mortgage\n\nThis calculator will let you calculate the APR of a mortgage based on the amount of the loan, its nominal interest rate, repayment term, fees, and, if it were compulsory, the payment protection insurance premium.\n\nYou can make various calculations and compare the APR for each of them.",
null,
"Abre en ventana nueva\n\n• ### Calculation assumptions\n\nThis calculator can be used for loans incurring fees and expenses which have to be included in the calculation of the annual percentage rate (APR) and which are paid when the loan is arranged and on a regular basis.\n\nThis calculator is based on the assumption that the loan is repaid in equal monthly instalments and that the proportion of the monthly payment corresponding to interest is calculated using the following formula:\n\n(Outstanding capital x nominal annual rate) / 1200.\n\nCalculations have been simplified as follows, so that the calculator can be used with in as many cases as possible:\n\n• Customers pay all the loan assessment, evaluation and arrangement costs on the date the loan agreement is signed\n• Instalments are paid on a monthly basis\n• Every month of the year has the same number of days\n• There are no payment holidays and the first payment is made exactly one month after the loan has been arranged\n\nThe instructions for calculate the annual percentage rate can be found in Anexo II of Ley 5/2019, de 15 de marzo, reguladora de los contratos de crédito inmobiliario.Abre en ventana nueva.\n\nDid you find this information useful?"
] | [
null,
"https://clientebancario.bde.es/f/webcb/RCL/img/ir_simulador_en.jpg",
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.9436039,"math_prob":0.96415585,"size":1462,"snap":"2021-04-2021-17","text_gpt3_token_len":303,"char_repetition_ratio":0.14677641,"word_repetition_ratio":0.008064516,"special_character_ratio":0.19904241,"punctuation_ratio":0.067669176,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9866128,"pos_list":[0,1,2],"im_url_duplicate_count":[null,null,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2021-01-17T00:37:21Z\",\"WARC-Record-ID\":\"<urn:uuid:853b2120-aa47-405c-9840-b8c4fbcfb793>\",\"Content-Length\":\"33003\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:6029a4ab-cbbe-4c16-b245-e825c8948f55>\",\"WARC-Concurrent-To\":\"<urn:uuid:2b6c36c8-1a5b-44cd-bbba-ab81c0763ea4>\",\"WARC-IP-Address\":\"77.73.203.99\",\"WARC-Target-URI\":\"https://clientebancario.bde.es/pcb/en/menu-horizontal/podemosayudarte/simuladores/calculo-de-la-tae-de-un-prestamo-hipotecario.html\",\"WARC-Payload-Digest\":\"sha1:JDLFPHFLNW45K2QUEGFUMII5X6VWMQ3B\",\"WARC-Block-Digest\":\"sha1:UGJIMMGVV6L5WYU37VJJDWHZD3WY63IB\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2021/CC-MAIN-2021-04/CC-MAIN-2021-04_segments_1610703507971.27_warc_CC-MAIN-20210116225820-20210117015820-00419.warc.gz\"}"} |
http://lambda.jimpryor.net/git/gitweb.cgi?p=lambda.git;a=commitdiff;h=94af2dbc84f38e23ae79e560300923f458615aeb | [
"author jim Fri, 20 Mar 2015 12:42:29 +0000 (08:42 -0400) committer Linux User Fri, 20 Mar 2015 12:42:29 +0000 (08:42 -0400)\n\nindex 23f4ff6..2403da7 100644 (file)\n@@ -116,12 +116,21 @@ Here are the types of our crucial functions, together with our pronunciation, an\n<code>join: <span class=\"box2\">P</span> -> <u>P</u></code>\n\n+In the class handout, we gave the types for `>=>` twice, and once was correct but the other was a typo. The above is the correct typing.\n+\n+Also, in the handout we called `mid` `𝟭`. But now we've decided that `mid`\n+is better. (Think of it as \"m\" plus \"identity\", not as the start of \"midway\".)\n+\nThe menagerie isn't quite as bewildering as you might suppose. Many of these will\nbe interdefinable. For example, here is how `mcomp` and `mbind` are related: <code>k <=< j ≡\n\\a. (j a >>= k)</code>.\n\n-In most cases of interest, instances of these systems of functions will provide\n-certain useful guarantees.\n+We will move freely back and forth between using `>=>` and using `<=<` (aka `mcomp`), which\n+is just `>=>` with its arguments flipped. `<=<` has the virtue that it corresponds more\n+closely to the ordinary mathematical symbol `○`. But `>=>` has the virtue\n+that its types flow more naturally from left to right.\n+\n+These functions come together in several systems, and have to be defined in a way that coheres with the other functions in the system:\n\n* ***Mappable*** (in Haskelese, \"Functors\") At the most general level, box types are *Mappable*\nif there is a `map` function defined for that box type with the type given above. This\n@@ -130,7 +139,9 @@ has to obey the following Map Laws:\n<code>map (id : α -> α) = (id : <u>α</u> -> <u>α</u>)</code>\n<code>map (g ○ f) = (map g) ○ (map f)</code>\n\n- Essentially these say that `map` is a homomorphism from `(α -> β, ○, id)` to <code>(<u>α</u> -> <u>β</u>, ○', id')</code>, where `○'` and `id'` are `○` and `id` restricted to arguments of type <code><u>_</u></code>. That might be hard to digest because it's so abstract. Think of the following concrete example: if you take a `α list` (that's our <code><u>α</u></code>), and apply `id` to each of its elements, that's the same as applying `id` to the list itself. That's the first law. And if you apply the composition of functions `g ○ f` to each of the list's elements, that's the same as first applying `f` to each of the elements, and then going through the elements of the resulting list and applying `g` to each of those elements. That's the second law. These laws obviously hold for our familiar notion of `map` in relation to lists.\n+ Essentially these say that `map` is a homomorphism from the algebra of `(universe α -> β, operation ○, elsment id)` to that of <code>(<u>α</u> -> <u>β</u>, ○', id')</code>, where `○'` and `id'` are `○` and `id` restricted to arguments of type <code><u>_</u></code>. That might be hard to digest because it's so abstract. Think of the following concrete example: if you take a `α list` (that's our <code><u>α</u></code>), and apply `id` to each of its elements, that's the same as applying `id` to the list itself. That's the first law. And if you apply the composition of functions `g ○ f` to each of the list's elements, that's the same as first applying `f` to each of the elements, and then going through the elements of the resulting list and applying `g` to each of those elements. That's the second law. These laws obviously hold for our familiar notion of `map` in relation to lists.\n+\n+ > <small>As mentioned at the top of the page, in Category Theory presentations of monads they usually talk about \"endofunctors\", which are mappings from a Category to itself. In the uses they make of this notion, the endofunctors combine the role of a box type <code><u>_</u></code> and of the `map` that goes together with it.\n\n* ***MapNable*** (in Haskelese, \"Applicatives\") A Mappable box type is *MapNable*"
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.9095665,"math_prob":0.61912507,"size":3554,"snap":"2019-35-2019-39","text_gpt3_token_len":1025,"char_repetition_ratio":0.13239437,"word_repetition_ratio":0.43535188,"special_character_ratio":0.29234666,"punctuation_ratio":0.09928057,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9765193,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2019-09-20T08:22:58Z\",\"WARC-Record-ID\":\"<urn:uuid:5b5c6df4-7f9d-459c-b516-5e578df842b0>\",\"Content-Length\":\"17244\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:635749b9-755b-4f43-9768-3d53ce212f1d>\",\"WARC-Concurrent-To\":\"<urn:uuid:599ed552-6b3b-4b06-82b5-7b2f0b7c6a02>\",\"WARC-IP-Address\":\"45.79.164.50\",\"WARC-Target-URI\":\"http://lambda.jimpryor.net/git/gitweb.cgi?p=lambda.git;a=commitdiff;h=94af2dbc84f38e23ae79e560300923f458615aeb\",\"WARC-Payload-Digest\":\"sha1:DAG5TSGKOTCQUNKN6GYCOSPU6FXXBDFK\",\"WARC-Block-Digest\":\"sha1:4D4OEIFDTB6M7VTNSIAICDHQBA5UN7XW\",\"WARC-Identified-Payload-Type\":\"application/xhtml+xml\",\"warc_filename\":\"/cc_download/warc_2019/CC-MAIN-2019-39/CC-MAIN-2019-39_segments_1568514573908.70_warc_CC-MAIN-20190920071824-20190920093824-00262.warc.gz\"}"} |
https://mran.revolutionanalytics.com/snapshot/2022-05-15/web/packages/err/readme/README.html | [
"# err",
null,
"## Introduction\n\nTo err is human - Alexander Pope (1711)\n\n`err` is a light-weight R package to produce customizable number and object sensitive error and warning messages.\n\n## Demonstration\n\n### Object Sensitive\n\nThe `co` functions produce object sensitive strings.\n\n``````library(err)\n\nfox <- c(\"The\", \"quick\", \"brown\", \"fox\", \"jumps\", \"over\", \"the\", \"lazy\", \"dog\")\nco(fox)\n#> \"fox has 9 values: 'The', 'quick', 'brown', 'fox', 'jumps', 'over', 'the', 'lazy', 'dog'\"\nco(fox)\n#> \"fox has 1 value: 'The'\"\nco(fox)\n#> \"fox has 0 values\"\nco(fox, nlots = 5)\n#> \"fox has 9 values: 'The', 'quick', 'brown', ..., 'dog'\"``````\n\n### Customizable\n\nThe object sensitive strings are fully customized.\n\n``````one <- \"darn! the vector %o of length %n has the following value: %c\"\nnone <- \"phew! vector %o is empty\"\nsome <- \"rats! vector %o has the following %n element%s: %c\"\nlots <- \"really?! the %n elements of vector %o are too numerous to print\"\n\nco(fox, one = one, none = none, some = some, lots = lots, nlots = 5)\n#> \"phew! vector fox is empty\"\nco(fox, one = one, none = none, some = some, lots = lots, nlots = 5)\n#> \"darn! the vector fox of length 1 has the following value: 'The'\"\nco(fox[1:3], one = one, none = none, some = some, lots = lots, nlots = 5)\n#> \"rats! vector fox[1:3] has the following 3 elements: 'The', 'quick', 'brown'\"\nco(fox[1:5], one = one, none = none, some = some, lots = lots, nlots = 5)\n#> \"really?! the 5 elements of vector fox[1:5] are too numerous to print\"``````\n\nThe following `sprintf`-like types can be used in the custom messages:\n\n• `%c`: the object as a comma separated list (produced by a `cc` function)\n• `%n`: the length of the object\n• `%o`: the name of the object\n• `%s`: ‘s’ if n != 1 otherwise ’’\n• `%r`: ‘are’ if n != 1 otherwise ‘is’\n\nAnd there are various formatting options\n\n``````co(fox[1:6], conjunction = \"or\", bracket = \"|\", oxford = TRUE, ellipsis = 5)\n#> \"fox[1:6] has 6 values: |The|, |quick|, |brown|, ..., or |over|\"``````\n\n### Data Frames\n\nThere is also a method for data frames.\n\n``````cat(co(datasets::mtcars, conjunction = \"and\", oxford = TRUE, ellipsis = 5))\n#> datasets::mtcars has 11 columns\n#> mpg: 21, 21, 22.8, ..., and 21.4\n#> cyl: 6, 6, 4, ..., and 4\n#> disp: 160, 160, 108, ..., and 121\n#> ...\n#> and carb: 4, 4, 1, ..., and 2``````\n\n### Number Sensitive\n\nThe `cn` function produces number sensitive customizable messages\n\n``````cn(0)\n#> \"there are 0 values\"\ncn(1)\n#> \"there is 1 value\"\ncn(2)\n#> \"there are 2 values\"\ncn(100, lots = \"there %r %n value%s - this is a lot\")\n#> \"there are 100 values - this is a lot\"``````\n\n### Warning and Error Messages\n\nThe `co` and `cn` functions can be combined with the wrappers `msg`, `wrn` and `err` to produce a message, warning and error (without the call as part of the warning/error message).\n\n``````msg(cn(2))\n#> there are 2 values\nwrn(cn(2))\n#> Warning: there are 2 values\nerr(cn(2))\n#> Error: there are 2 values``````\n\n## Installation\n\nTo install the latest release version from CRAN\n\n``install.packages(\"err\")``\n\nTo install the latest development version from GitHub\n\n``````if(!\"devtools\" %in% installed.packages()[,1])\ninstall.packages(\"devtools\")\ndevtools::install_github(\"poissonconsulting/err\")``````\n\nTo install the latest development version from the Poisson drat repository\n\n``````if(!\"drat\" %in% installed.packages()[,1])\ninstall.packages(\"drat\")"
] | [
null,
"https://mran.revolutionanalytics.com/snapshot/2022-05-15/web/packages/err/readme/man/figures/logo.png",
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.77317727,"math_prob":0.9303563,"size":3405,"snap":"2022-40-2023-06","text_gpt3_token_len":1107,"char_repetition_ratio":0.12731549,"word_repetition_ratio":0.13111888,"special_character_ratio":0.35712188,"punctuation_ratio":0.21815719,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9630069,"pos_list":[0,1,2],"im_url_duplicate_count":[null,null,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2023-01-30T11:49:52Z\",\"WARC-Record-ID\":\"<urn:uuid:36c87302-e09a-4d30-bd4c-af58fafc1536>\",\"Content-Length\":\"16917\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:aa8406f7-18d1-464b-97e8-9b21b9c951b9>\",\"WARC-Concurrent-To\":\"<urn:uuid:3f876bd2-5fac-46ef-b6b6-e592b38eadcc>\",\"WARC-IP-Address\":\"40.118.246.51\",\"WARC-Target-URI\":\"https://mran.revolutionanalytics.com/snapshot/2022-05-15/web/packages/err/readme/README.html\",\"WARC-Payload-Digest\":\"sha1:YMUPNWJ7MPCJSKJJYK53OUSRIDJQC6SM\",\"WARC-Block-Digest\":\"sha1:OH67RTJKD6BDRNGLT5PZ74ZQCB63ON55\",\"WARC-Identified-Payload-Type\":\"application/xhtml+xml\",\"warc_filename\":\"/cc_download/warc_2023/CC-MAIN-2023-06/CC-MAIN-2023-06_segments_1674764499816.79_warc_CC-MAIN-20230130101912-20230130131912-00009.warc.gz\"}"} |
https://answers.everydaycalculation.com/compare-fractions/2-4-and-3-9 | [
"Solutions by everydaycalculation.com\n\n## Compare 2/4 and 3/9\n\n2/4 is greater than 3/9\n\n#### Steps for comparing fractions\n\n1. Find the least common denominator or LCM of the two denominators:\nLCM of 4 and 9 is 36\n\nNext, find the equivalent fraction of both fractional numbers with denominator 36\n2. For the 1st fraction, since 4 × 9 = 36,\n2/4 = 2 × 9/4 × 9 = 18/36\n3. Likewise, for the 2nd fraction, since 9 × 4 = 36,\n3/9 = 3 × 4/9 × 4 = 12/36\n4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction\n5. 18/36 > 12/36 or 2/4 > 3/9\n\nMathStep (Works offline)",
null,
"Download our mobile app and learn to work with fractions in your own time:"
] | [
null,
"https://answers.everydaycalculation.com/mathstep-app-icon.png",
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.87953645,"math_prob":0.9955734,"size":397,"snap":"2021-31-2021-39","text_gpt3_token_len":176,"char_repetition_ratio":0.2977099,"word_repetition_ratio":0.0,"special_character_ratio":0.4534005,"punctuation_ratio":0.037383176,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9956261,"pos_list":[0,1,2],"im_url_duplicate_count":[null,null,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2021-08-01T18:03:57Z\",\"WARC-Record-ID\":\"<urn:uuid:70cd81b8-d0fb-428f-8988-e71c030e5ff6>\",\"Content-Length\":\"8214\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:6eccaaf0-b9d0-4187-b6fa-9ea6dfa26220>\",\"WARC-Concurrent-To\":\"<urn:uuid:5a9228ec-8070-4285-8eb2-fa13ed9ffc05>\",\"WARC-IP-Address\":\"96.126.107.130\",\"WARC-Target-URI\":\"https://answers.everydaycalculation.com/compare-fractions/2-4-and-3-9\",\"WARC-Payload-Digest\":\"sha1:GUL6KOCSLISOQZCGFEG6XJSFYJUKY26A\",\"WARC-Block-Digest\":\"sha1:OMHP5NOUXCVS3UFGA64VSDTIZ572SYGT\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2021/CC-MAIN-2021-31/CC-MAIN-2021-31_segments_1627046154214.63_warc_CC-MAIN-20210801154943-20210801184943-00530.warc.gz\"}"} |
https://atomscientific.com/category/chemicals/volumetric-solutions/page/2 | [
"phone 0161 366 5123 mail [email protected]",
null,
"A highly accurate and precisely manufactured range of Volumetric Solutions, Buffer Solutions, Calibration Buffers and Conductivity Standards\n\n## P\n\nPotassium Chloride Solution 4.0M (4.0N)\nPotassium Hydroxide Solution 0.075M (0.075N)\nPotassium Hydroxide Solution 0.1M (0.1N)\nPotassium Hydroxide Solution 0.5M (0.5N)\nPotassium Hydroxide Solution 1.0M (1.0N)\nPotassium Hydroxide Solution 5.0M (5.0N)\nPotassium Permanganate Solution 0.02M (0.1N)\nPotassium Permanganate Solution 0.1M (0.5N)\nPotassium Permanganate Solution 0.2M (1.0N)\nPotassium Thiocyanate Solution 0.05M (0.05N)\nPotassium Thiocyanate Solution 0.1M (0.1N)\n\n## S\n\nSilver Nitrate Solution 0.02M (0.02N)\nSilver Nitrate Solution 0.05N (0.05M)\nSilver Nitrate Solution 0.085M (0.085N)\nSilver Nitrate Solution 0.1709M (0.1709N)\nSilver Nitrate Solution 0.1M (0.1N)\nSilver Nitrate Solution 0.5M (0.5N)\nSilver Nitrate Solution 1.0M (1.0N)\nSodium Azide 0.1M Solution\nSodium Carbonate Solution 0.5M\nSodium Chloride Solution 0.1M (0.1N)\nSodium Chloride Solution 5.0M\nSodium Hydroxide Solution 2.5M (2.5N)\nSodium Hydroxide Solution 0.01M (0.01N)\nSodium Hydroxide Solution 0.02M (0.02N)\nSodium Hydroxide Solution 0.111M (0.111N)\nSodium Hydroxide Solution 0.14M (0.14N)\nSodium Hydroxide Solution 0.156M (0.156N)\nSodium Hydroxide Solution 0.1M (0.1N)\nSodium Hydroxide Solution 0.25M (0.25N)\nSodium Hydroxide Solution 0.2M (0.2N)\nSodium Hydroxide Solution 0.313M (0.313N)\nSodium Hydroxide Solution 0.33M (0.33N)\nSodium Hydroxide Solution 0.5M (0.5N)\nSodium Hydroxide Solution 1.0M (1.0N)\nSodium Hydroxide Solution 10.0M (10N)\nSodium Hydroxide Solution 12.5M (12.5N)\nSodium Hydroxide Solution 2.0M (2.0N)\nSodium Hydroxide Solution 3.0M (3N)\nSodium Hydroxide Solution 4.0M (4.0N)\nSodium Hydroxide Solution 5.0M (5N)\nSodium Hydroxide Solution 8.0M (8N)\nSodium Thiosulphate Solution 0.1M (0.1N)\nSodium Thiosulphate Solution 1.0M (1.0N)\nSulphosalicylic Acid Solution 0.8M\nSulphuric Acid Solution 0.05M (0.1N)\nSulphuric Acid Solution 0.1M (0.2N)\nSulphuric Acid Solution 0.25M (0.5N)"
] | [
null,
"https://atomscientific.com/images/categorybanners/volumetric-solutions-2022-category-banner-png.jpg",
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.5921933,"math_prob":0.9408465,"size":2062,"snap":"2023-14-2023-23","text_gpt3_token_len":860,"char_repetition_ratio":0.3765792,"word_repetition_ratio":0.0,"special_character_ratio":0.3457808,"punctuation_ratio":0.2078522,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9905249,"pos_list":[0,1,2],"im_url_duplicate_count":[null,null,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2023-06-09T07:12:17Z\",\"WARC-Record-ID\":\"<urn:uuid:464d9407-fc7e-4a72-a97b-f5678baef39b>\",\"Content-Length\":\"27276\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:5afc7337-12a8-4751-98d4-cf5b8ae457bd>\",\"WARC-Concurrent-To\":\"<urn:uuid:2331b5cd-e4ba-4b98-be7f-b1edc60c482a>\",\"WARC-IP-Address\":\"178.159.12.141\",\"WARC-Target-URI\":\"https://atomscientific.com/category/chemicals/volumetric-solutions/page/2\",\"WARC-Payload-Digest\":\"sha1:PIUFR3WVRAN2IU4HLN4LOZDW73LSKLHW\",\"WARC-Block-Digest\":\"sha1:IWSOXWGEEVUO7HKY74RFSCOKJC5WGF6V\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2023/CC-MAIN-2023-23/CC-MAIN-2023-23_segments_1685224655446.86_warc_CC-MAIN-20230609064417-20230609094417-00405.warc.gz\"}"} |
https://numbermatics.com/n/11163/ | [
"# 11163\n\n## 11,163 is an odd composite number composed of two prime numbers multiplied together.\n\nWhat does the number 11163 look like?\n\nThis visualization shows the relationship between its 2 prime factors (large circles) and 6 divisors.\n\n11163 is an odd composite number. It is composed of two distinct prime numbers multiplied together. It has a total of six divisors.\n\n## Prime factorization of 11163:\n\n### 3 × 612\n\n(3 × 61 × 61)\n\nSee below for interesting mathematical facts about the number 11163 from the Numbermatics database.\n\n### Names of 11163\n\n• Cardinal: 11163 can be written as Eleven thousand, one hundred sixty-three.\n\n### Scientific notation\n\n• Scientific notation: 1.1163 × 104\n\n### Factors of 11163\n\n• Number of distinct prime factors ω(n): 2\n• Total number of prime factors Ω(n): 3\n• Sum of prime factors: 64\n\n### Divisors of 11163\n\n• Number of divisors d(n): 6\n• Complete list of divisors:\n• Sum of all divisors σ(n): 15132\n• Sum of proper divisors (its aliquot sum) s(n): 3969\n• 11163 is a deficient number, because the sum of its proper divisors (3969) is less than itself. Its deficiency is 7194\n\n### Bases of 11163\n\n• Binary: 101011100110112\n• Base-36: 8M3\n\n### Squares and roots of 11163\n\n• 11163 squared (111632) is 124612569\n• 11163 cubed (111633) is 1391050107747\n• The square root of 11163 is 105.6550992619\n• The cube root of 11163 is 22.3491138687\n\n### Scales and comparisons\n\nHow big is 11163?\n• 11,163 seconds is equal to 3 hours, 6 minutes, 3 seconds.\n• To count from 1 to 11,163 would take you about three hours.\n\nThis is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)\n\n• A cube with a volume of 11163 cubic inches would be around 1.9 feet tall.\n\n### Recreational maths with 11163\n\n• 11163 backwards is 36111\n• The number of decimal digits it has is: 5\n• The sum of 11163's digits is 12\n• More coming soon!\n\n#### Copy this link to share with anyone:\n\nMLA style:\n\"Number 11163 - Facts about the integer\". Numbermatics.com. 2023. Web. 5 December 2023.\n\nAPA style:\nNumbermatics. (2023). Number 11163 - Facts about the integer. Retrieved 5 December 2023, from https://numbermatics.com/n/11163/\n\nChicago style:\nNumbermatics. 2023. \"Number 11163 - Facts about the integer\". https://numbermatics.com/n/11163/\n\nThe information we have on file for 11163 includes mathematical data and numerical statistics calculated using standard algorithms and methods. We are adding more all the time. If there are any features you would like to see, please contact us. Information provided for educational use, intellectual curiosity and fun!\n\nKeywords: Divisors of 11163, math, Factors of 11163, curriculum, school, college, exams, university, Prime factorization of 11163, STEM, science, technology, engineering, physics, economics, calculator, eleven thousand, one hundred sixty-three.\n\nOh no. Javascript is switched off in your browser.\nSome bits of this website may not work unless you switch it on."
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.8572975,"math_prob":0.9585965,"size":2662,"snap":"2023-40-2023-50","text_gpt3_token_len":707,"char_repetition_ratio":0.12151994,"word_repetition_ratio":0.025821596,"special_character_ratio":0.31442523,"punctuation_ratio":0.16602316,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.98476386,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2023-12-05T19:47:54Z\",\"WARC-Record-ID\":\"<urn:uuid:61ef7aeb-ab30-4852-9c8a-532d34cd32c6>\",\"Content-Length\":\"19073\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:b649a069-1b67-421c-a62e-11467594f514>\",\"WARC-Concurrent-To\":\"<urn:uuid:53886e14-96c1-4602-aff9-547d14a39f18>\",\"WARC-IP-Address\":\"72.44.94.106\",\"WARC-Target-URI\":\"https://numbermatics.com/n/11163/\",\"WARC-Payload-Digest\":\"sha1:QGKV4DQG7KQU2EBRIZJY52RPM2EMBZHJ\",\"WARC-Block-Digest\":\"sha1:WB7WLLBHW4HVTEZTV5VEDJHARDWK7KIB\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2023/CC-MAIN-2023-50/CC-MAIN-2023-50_segments_1700679100555.27_warc_CC-MAIN-20231205172745-20231205202745-00036.warc.gz\"}"} |
https://math.stackexchange.com/questions/430543/how-do-i-understand-the-meaning-of-the-phrase-up-to-in-mathematics/430555 | [
"# How do I understand the meaning of the phrase \"up to~\" in mathematics?\n\nI am reading a book that explains elementary number theory: Number Theory: A Lively Introduction with Proofs, Applications, and Stories by James Pommersheim, Tim Marks and Erica Flapan.\n\nThe authors say,\n\n\"We express this idea in the statement of the Fundamental of Arithmetic by saying that prime factorization are unique up to order. ... for example, 40 and -40 are equal up to sign, the functions $12x^2$ and $x^2$ are equal up to a constant factor, and so forth.\"\n\nBecause I am not an English native speaker, the phrase \"up to\" is ambiguous for me a little bit. I would like to figure out the meaning of the phrase and use it properly. How do I do?\n\n• Have you learned about equivalence relation? Think about the mean of \"up to\" comparing with equivalence relation. Jun 27, 2013 at 5:09\n• By the way, many feel that it is in poor taste to refer to only one of the authors of a book. Imagine how much time and energy it would take to write a math book, even with the help of some coauthors. Every author's name deserves to be given. Jun 27, 2013 at 5:43\n\nWhen one says \"$X$ is true up to $Y$\", then one means that it is not strictly speaking correct that $X$ is true, and the $Y$ which occurs after the up to clarifies the sense in which $X$ is not quite true.\n\nThus it really means \"Roughly speaking $X$ is true, except for $Y$\".\n\nAs you can see, this is a very informal construction. It could be used very abusively. In order to be acceptable, the sense in which $Y$ \"corrects\" $X$ needs to be very familiar to the reader, or the underlying logic should be made more explicit.\n\nSo when one says that factorizations in $\\mathbb{Z}$ are unique up to order, then it is understood that of course we could have $a*b*c= b*a*c = c*a*b = \\ldots$ and we don't want to count these as being essentially different factorizations. In this case this sloppy language is probably a good expository choice, since most readers have an intuitive idea of what the \"exception\" is, whereas spelling it out explicitly would probably involve something like the following:\n\nUniqueness of Prime Factorizations: If $r$ and $s$ are positive integers, $p_1,\\ldots,p_r,q_1,\\ldots,q_s$ are prime numbers and $p_1 \\cdots p_r = q_1 \\cdots q_s$, then $r = s$ and there is a bijection $\\sigma: \\{1,\\ldots,r\\} \\rightarrow \\{1,\\ldots,s\\}$ such that $p_i = q_{\\sigma(i)}$ for all $1 \\leq i \\leq r$.\n\nThe point is that this more precise statement will be gibberish to someone who does not have a certain amount of mathematical sophistication. (On the other hand, at some point a student of mathematics should be able to supply the statement above or something equally explicit and logically equivalent. In fact I happen to recall one colleague of mine, a veteran research mathematician, who told me that he was always uncomfortable with the statement of uniqueness of factorization because of the vague phrase \"up to\". He has very high standards for clear exposition and thinking.) The book that you speak of is written for a much more general audience, so their expository choice is a good one.\n\n(As an aside, I was first introduced to number theory in a course taught by Marks and Pommersheim, a course they taught to talented high school students during the summer over a period of many years. I haven't read the book that you mention, coauthored with Flapan, but I'd have to think that it is largely based on these courses. This course was one of the great influences on my intellectual life -- not coincidentally I am now a number theorist! -- so I expect the book is pretty good.)\n\n• Good point. As an example of sloppy thinking I offer myself: if asked to make the statement more explicit without \"up to\", I'd probably have written something like \"If $r$ and $s$ are positive integers, and $p_1,\\dots,p_r$ and $q_1,\\dots,q_s$ are prime numbers satisfying $p_1\\le\\dots\\le p_r$ and $q_1\\le\\dots\\le q_s$, then $r=s$ and $p_i=q_i$ for all $1\\le i\\le r$.\" Now I think of it, this statement, while correct, is actually weaker than the original statement, and has essentially pushed the issue of order under the rug. (This picks one particular bijection $\\sigma$ as above of course.) Jun 27, 2013 at 6:21\n• @ShrreevatsaR: sure, the result is often stated that way, and it is more palatable than my version. I was really thinking of the statement about unique factorization into irreducibles in a general integral domain, in which there need not be a natural ordering on the irreducibles. (But then you need to say that $p_i$ and $q_{\\sigma(i)}$ are associate, not equal.) Jun 27, 2013 at 7:44\n\n\"$A$ and $B$ are equal up to $x$\" means that either $A = B$, or that $A$ can be obtained from $B$ by merely modifying $x$ or applying $x$.\n\nExamples:\n\n• $4$ and $-4$ are equal up to sign because you can obtain one from the other by modifying the sign.\n• $(2^3, 7^4)$ and $(7^4, 2^3)$ are equal up to order since you can obtain one from the other by modifying the order.\n• $S_2$ and $\\mathbb{Z}/2\\mathbb{Z}$ are equal up to isomorphism (as groups) since you can obtain one from the other by applying an isomorphism.\n\nIt's understood that when ever this terminology is used, the relation between $A$ and $B$ is an equivalence relation on objects of the type of $A$ and $B$."
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.95979583,"math_prob":0.9924771,"size":2488,"snap":"2022-27-2022-33","text_gpt3_token_len":605,"char_repetition_ratio":0.08494364,"word_repetition_ratio":0.0,"special_character_ratio":0.23794213,"punctuation_ratio":0.096114516,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.99813133,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2022-08-08T22:33:54Z\",\"WARC-Record-ID\":\"<urn:uuid:68870463-45c4-4eff-935f-1dd305107c30>\",\"Content-Length\":\"238605\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:2c093c2a-b2b1-47f8-898f-2746ec194bee>\",\"WARC-Concurrent-To\":\"<urn:uuid:e1143db1-96a5-4d72-a81e-019e9eb11e4c>\",\"WARC-IP-Address\":\"151.101.193.69\",\"WARC-Target-URI\":\"https://math.stackexchange.com/questions/430543/how-do-i-understand-the-meaning-of-the-phrase-up-to-in-mathematics/430555\",\"WARC-Payload-Digest\":\"sha1:GKQYXXAKD4ZZJOFRVWGEIBMK7NY75NOL\",\"WARC-Block-Digest\":\"sha1:35Z6JITGJ6OWCERG6QMTDRUNYQXNUEUW\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2022/CC-MAIN-2022-33/CC-MAIN-2022-33_segments_1659882570879.1_warc_CC-MAIN-20220808213349-20220809003349-00046.warc.gz\"}"} |
http://www.cs.cmu.edu/~bmm/LeisersonM88.html | [
"• Communication-efficient parallel algorithms for distributed random-access machines. C. E. Leiserson and B. M. Maggs, Algorithmica, Vol. 3, 1988, pp. 53-77.\nThis paper introduces a model for parallel computation called the distributed random-access machine (DRAM). A DRAM is an abstraction of a parallel computer in which memory accesses are implemented by routing messages through a communication network. A DRAM explicitly models the congestion of messages across cuts of the network. We introduce the notion of a conservative algorithm as one whose communication requirements at each step can be bounded by the congestion of pointers of the input data structure across cuts of a DRAM. We give a simple lemma that shows how to ``shortcut'' pointers in a data structure so that remote processors can communicate without causing undue congestion. We give O(log n)-step, linear-processor, linear-space, conservative algorithms for a variety of problems on n-node trees, such as computing treewalk numberings and evaluating all subexpressions in an expression tree, and O(log^2 n)-step conservative algorithms for problems on graphs of size n, including finding a minimum-cost spanning forest, computing biconnected components, and constructing an Eulerian cycle.\n\nBack to other publications"
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.81363106,"math_prob":0.83802855,"size":1316,"snap":"2019-13-2019-22","text_gpt3_token_len":287,"char_repetition_ratio":0.094512194,"word_repetition_ratio":0.0,"special_character_ratio":0.19452888,"punctuation_ratio":0.11255411,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9745633,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2019-03-25T04:12:19Z\",\"WARC-Record-ID\":\"<urn:uuid:b937cc58-ba49-4410-a2a0-78ea41e545af>\",\"Content-Length\":\"2211\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:e75cde0e-2476-4309-a704-504db25b28e9>\",\"WARC-Concurrent-To\":\"<urn:uuid:001ec5a2-5666-4b45-adb3-b705fd686c36>\",\"WARC-IP-Address\":\"128.2.42.95\",\"WARC-Target-URI\":\"http://www.cs.cmu.edu/~bmm/LeisersonM88.html\",\"WARC-Payload-Digest\":\"sha1:22MBCSHATYBEKJ5FUJF4XAHCSPDUCU33\",\"WARC-Block-Digest\":\"sha1:GHM7NWXY46O5TEERAW7IJVCDDF7FVKPK\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2019/CC-MAIN-2019-13/CC-MAIN-2019-13_segments_1552912203548.81_warc_CC-MAIN-20190325031213-20190325053213-00245.warc.gz\"}"} |
https://www.cheenta.com/sequence-and-integers-aime-i-2007-question-14/ | [
"",
null,
"Try this beautiful problem from the American Invitational Mathematics Examination I, AIME I, 2007 based on Sequence and Integers.\n\n## Sequence and Integers – AIME I, 2007\n\nA sequence is defined over non negetive integral indexes in the following way $a_0=a_1=3$, $a_{n+1}a_{n-1}=a_n^{2}+2007$, find the greatest integer that does not exceed $\\frac{a_{2006}^{2}+a_{2007}^{2}}{a_{2006}a_{2007}}$\n\n• is 107\n• is 224\n• is 840\n• cannot be determined from the given information\n\n### Key Concepts\n\nSequence\n\nInequalities\n\nIntegers\n\nBut try the problem first…\n\nSource\n\nAIME I, 2007, Question 14\n\nElementary Number Theory by David Burton\n\n## Try with Hints\n\nFirst hint\n\n$a_{n+1}a_{n-1}$=$a_{n}^{2}+2007$ then $a_{n-1}^{2} +2007 =a_{n}a_{n-2}$ adding these $\\frac{a_{n-1}+a_{n+1}}{a_{n}}$=$\\frac{a_{n}+a_{n-2}}{a_{n-1}}$, let $b_{j}$=$\\frac{a_{j}}{a_{j-1}}$ then $b_{n+1} + \\frac{1}{b_{n}}$=$b_{n}+\\frac{1}{b_{n-1}}$ then $b_{2007} + \\frac{1}{b_{2006}}$=$b_{3}+\\frac{1}{b_{2}}$=225\n\nSecond Hint\n\nhere $\\frac{a_{2007}a_{2005}}{a_{2006}a_{2005}}$=$\\frac{a_{2006}^{2}+2007}{a_{2006}a_{2005}}$ then $b_{2007}$=$\\frac{a_{2007}}{a_{2006}}$=$\\frac{a_{2006}^{2}+2007}{a_{2006}a_{2005}}$$\\gt$$\\frac{a_{2006}}{a_{2005}}$=$b_{2006}$\n\nFinal Step\n\nthen $b_{2007}+\\frac{1}{b_{2007}} \\lt b_{2007}+\\frac{1}{b_{2006}}$=225 which is small less such that all $b_{j}$ s are greater than 1 then $\\frac{a_{2006}^{2}+ a_{2007}^{2}}{a_{2006}a_{2007}}$=$b_{2007}+\\frac{1}{b_{2007}}$=224."
] | [
null,
"https://www.facebook.com/tr",
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.5565305,"math_prob":0.99996746,"size":1657,"snap":"2020-24-2020-29","text_gpt3_token_len":714,"char_repetition_ratio":0.20871143,"word_repetition_ratio":0.0,"special_character_ratio":0.51840675,"punctuation_ratio":0.057228915,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":1.0000068,"pos_list":[0,1,2],"im_url_duplicate_count":[null,null,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2020-07-16T14:51:15Z\",\"WARC-Record-ID\":\"<urn:uuid:2b97b6f1-2f2e-4d3a-91ce-d43623e6550b>\",\"Content-Length\":\"149338\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:30040bd1-aa66-42cb-962d-2938028a2711>\",\"WARC-Concurrent-To\":\"<urn:uuid:04954495-98fe-4bb3-8178-9fb014a25038>\",\"WARC-IP-Address\":\"35.213.169.84\",\"WARC-Target-URI\":\"https://www.cheenta.com/sequence-and-integers-aime-i-2007-question-14/\",\"WARC-Payload-Digest\":\"sha1:V5LXAEK5VE3Q27626NYFR5ZWTFWM22RN\",\"WARC-Block-Digest\":\"sha1:5TXO4ATYRM5LWS23BFCZERPCZ34PM6QU\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2020/CC-MAIN-2020-29/CC-MAIN-2020-29_segments_1593657169226.65_warc_CC-MAIN-20200716122414-20200716152414-00591.warc.gz\"}"} |
https://electronics.stackexchange.com/questions/90464/how-to-apply-fourier-transform-to-0-5n-un | [
"# How to apply fourier transform to $0.5^n u(n)$\n\nI'm working in a signals class for continuous signals, and we have this problem shown above. I have tried using this function $f_1*f_2 = F_1 * F_2$, where I'm assuming this means multiplication of two functions is equal to the convolution of their fourier transforms. I'm using $f_1 = 0.5^n$ and $f_2 = u(n)$.\n\nSo I can calculate the fourier transorm of $u(n)$ fine. It is $\\pi\\delta(\\omega) + 1/(j\\omega))$. However, I cannot for the life of me figure out $0.5^n$. I tried to put it into the fourier transform integral integral of$(0.5^t)/(e^{j \\omega t})dt$ from negative infinity to infinity, but I end up with $0.5t/e^{jw}$, and when evaluated from negative infinity to infinity, I end up with $\\infty$ as my answer, unless of course the integration is wrong.\n\nTherefore, either the answer is $\\infty * \\pi\\delta(w) + 1/(j\\omega)$, which when convoluted would equal just the second function..? OR am I going about this problem completely wrong?\n\n## 1 Answer\n\nI think you'd better not split the functions. If you want to calculate the fourier transform of $0.5^t u(t)$, then you might put all that into the integral. Therefore, your integral limits will become $0$ to $+\\infty$ because of $u(t)$. And your integral result should not be infinity because your function $0.5^t$ goes to zero.\n\nSolving the integral:\n\n$\\large\\int_0^\\infty e^{(-jwt)} . 0.5^t dt$\n\nthe inside part could be rewrite:\n\n$\\huge\\frac{e^{(-jwt)}}{2^t} => (\\frac{e^{(-jw)}}{2})^t$\n\nYou could name $\\large\\frac{e^{(-jw)}}{2} = u$ so you get integral of $\\large u^t dt = \\frac{u^t}{ln(u)} + C$\n\nThen you get (replacing u):\n\n$\\huge\\frac{(\\frac{e^{-jw}}{2})^t}{ ln(e^{-jw}/2)}$\n\nWhen t goes to $+\\infty$ you get zero. When it goes to zero you get:\n\n$\\large\\frac{1}{ln(e^{-jw}/2)}$\n\nwhich left us:\n\n$\\large\\frac{1}{-jw - ln(2)}$\n\nI'm not sure I did not get lost in calculations but I believe its correct.\n\n• You're completely right. I got mixed up after separating the functions. Thank you! – nathpilland Nov 25 '13 at 2:12\n• You are welcome. Good luck – Felipe_Ribas Nov 25 '13 at 3:26"
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.91709775,"math_prob":0.9991708,"size":970,"snap":"2021-21-2021-25","text_gpt3_token_len":275,"char_repetition_ratio":0.098343685,"word_repetition_ratio":0.025641026,"special_character_ratio":0.30515465,"punctuation_ratio":0.12182741,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.99990404,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2021-06-16T10:56:20Z\",\"WARC-Record-ID\":\"<urn:uuid:e7d790c3-49f9-485b-92a6-6ea5d527f024>\",\"Content-Length\":\"166325\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:a3a8b213-de94-4679-9a9a-06ac5f18c38b>\",\"WARC-Concurrent-To\":\"<urn:uuid:5aa28ee1-5d29-49ce-9602-2c4aedc0b1ac>\",\"WARC-IP-Address\":\"151.101.129.69\",\"WARC-Target-URI\":\"https://electronics.stackexchange.com/questions/90464/how-to-apply-fourier-transform-to-0-5n-un\",\"WARC-Payload-Digest\":\"sha1:O7QTTV7W3OHPB53FWKBKQUD3YEUWEIHH\",\"WARC-Block-Digest\":\"sha1:UJSOFWNEE5OJ5PYYA2SNN4VEVVUNYTDM\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2021/CC-MAIN-2021-25/CC-MAIN-2021-25_segments_1623487623596.16_warc_CC-MAIN-20210616093937-20210616123937-00322.warc.gz\"}"} |
https://help-eli.org/free-printable-math-worksheets-for-2nd-grade.html | [
"# Free Printable Math Worksheets For 2nd Grade",
null,
"",
null,
"",
null,
"### 18 Free Printable Math Worksheets 2nd Grade Subtraction Free Printable Math Worksheets 2nd Grade Math Worksheets Subtraction Worksheets",
null,
"",
null,
"### 2nd Grade Math Worksheets Best Coloring Pages For Kids 2nd Grade Math Worksheets Math Fact Worksheets Free Printable Math Worksheets",
null,
"",
null,
"### Second-grade math worksheets with a mix of math fact fluency and word problems that will encourage your second graders to improve their math skills.\n\nFree printable math worksheets for 2nd grade. All worksheets are based on latest syllabus. When students start 2nd grade math they should already have good comprehension of addition and subtraction math facts. Digital games for kids.\n\nThis is a comprehensive collection of free printable math worksheets for second grade organized by topics such as addition subtraction mental math regrouping place value clock money geometry and multiplication. Get thousands of teacher-crafted activities that sync up with the school year. 3172021 Make practicing math FUN with these inovactive and seasonal - free 2nd grade math worksheets and math games to learn addition subtraction multiplication measurement graphs shapes telling time adding money fractions and skip counting by 3s 4s 6s 7s 8s 9s 11s 12s and other second grade math.\n\nSkip counting addition subtraction place value multiplication division fractions rounding telling. This math worksheet presents an equation and asks your child to use mental math skills to fill in the missing operation either or -. ESL fun games Worksheets PPTS Flash Cards Puzzles etc 100 FREE.\n\nFeel free to print them. Second graders will find it easy to navigate through this page downloading loads of printable PDF activity worksheets to practice or supplement their school workGrade 2 math topics. Our free math worksheets cover the full range of elementary school math skills from numbers and counting through fractions decimals word problems and more.",
null,
"",
null,
"### Math Worksheets For 2nd Grade Missing Subtraction Facts To 20 2 2nd Grade Math Worksheets Math Subtraction 2nd Grade Math",
null,
"### 3 2nd Grade Math Worksheets Borrowing Math Worksheets For 3rd Grade 3rd Grade Math Worksheets 2nd Grade Math Worksheets Free Printable Math Worksheets",
null,
"### 2nd Grade Worksheets Best Coloring Pages For Kids 2nd Grade Math Worksheets 2nd Grade Worksheets Math Practice Worksheets",
null,
"### Pin By Leslie Villani On Math Worksheets For Jawaun Math Worksheets 2nd Grade Math Worksheets Printable Math Worksheets",
null,
"### Multiplication Worksheets For Grade 2 3 20 Sheets Pdf Year 2 3 4 Grade 2 3 4 Numeracy Games Kids Printable Multiplication 2nd Grade Worksheets Multiplication Worksheets Math Worksheets",
null,
"",
null,
"### Clock Worksheet Quarter Past And Quarter To Telling Time Worksheets Clock Worksheets 2nd Grade Worksheets",
null,
"",
null,
"### Free Printable Worksheets For Second Grade Math Word Problems Addition Words Word Problem Worksheets Math Words",
null,
"### Printable Math Worksheets For 2nd Grade Worksheets 2nd Grade Second Grade Math Worksheets G Fun Math Worksheets Math Coloring Worksheets Free Math Worksheets",
null,
"### 2nd Grade Math Worksheets Best Coloring Pages For Kids 2nd Grade Math Worksheets 2nd Grade Worksheets Free Printable Math Worksheets",
null,
"### Multiplication Worksheets Printable Worksheets Etsy 2nd Grade Worksheets Math Fact Worksheets 2nd Grade Math Worksheets",
null,
"### 3rd Grade Math Worksheets Best Coloring Pages For Kids 2nd Grade Math Worksheets Math Practice Worksheets 3rd Grade Math Worksheets",
null,
"",
null,
"### 4 Free Math Worksheets Second Grade 2 Addition Adding 2 Digit Plus 1 Digit No Reg Subtraction Worksheets Subtraction With Regrouping Worksheets Math Worksheets",
null,
"### Easter Math Freebie 2nd Grade Math 2nd Grade Math Worksheets Free Math",
null,
"",
null,
"### 2nd Grade Math Worksheets Best Coloring Pages For Kids 2nd Grade Math Worksheets Math Worksheets 2nd Grade Math",
null,
"### 51 Free Printable 6 Grade Math Worksheets In 2020 Math Practice Worksheets 2nd Grade Math Worksheets Math Addition Worksheets",
null,
"",
null,
"### Free Printable Worksheets For Second Grade Math Word Problems Math Word Problems Word Problem Worksheets 2nd Grade Worksheets",
null,
"### Multiplication Coloring Sheets On Free Printable Math Worksheets Free Math Games Free Multiplication Worksheets Free Printable Math Worksheets Math Worksheets",
null,
"### Best 25 2nd Grade Math Worksheets Ideas On Pinterest Grade 2 Math Worksheets 2nd Grade Wo Telling Time Worksheets Time Worksheets 1st Grade Math Worksheets",
null,
"### 26 Free Printable Math Worksheets For 2nd Grade First Grade Math Worksheets Elementary School Math Math Lesson Plans",
null,
"### Free Printable Math Worksheets Sheets For 4th Grade Multiplication Worksh Addition And Subtraction Worksheets Printable Math Worksheets Subtraction Worksheets",
null,
"### Learning Sheets For 2nd Graders Second Grade Number Patterns Worksheet Printable Math Fact Worksheets 2nd Grade Math Worksheets Kids Math Worksheets",
null,
"### Math Worksheets For 2nd Graders All Kinds Of 2nd Grade Math Worksheets For Your K 2nd Grade Math Worksheets Math Counting Worksheets Skip Counting Worksheets",
null,
"### Addition Worksheets 0 10 Color By Number Fun Math Worksheets 2nd Grade Math Worksheets Free Math Worksheets",
null,
"",
null,
"",
null,
"### Free Printable Telling Time Worksheet Great For 2nd Grade Math Worksheet Tellingtime 48835 Time Worksheets Free Printable Math Worksheets 2nd Grade Activities",
null,
"",
null,
"### Free Printables For Kids Time Worksheets Telling Time Worksheets Kindergarten Telling Time",
null,
"### Math Worksheets For 2nd Grade Free Printables The Happy Housewife Home Schooling Math Worksheets 2nd Grade Math 2nd Grade Math Worksheets",
null,
"### Fractions 2nd Grade Math Worksheets Math Fractions Worksheets Fractions Worksheets",
null,
"### Our 5 Favorite 2nd Grade Math Worksheets Parenting Money Math Second Grade Math 2nd Grade Math Worksheets",
null,
"### Fractions Worksheet Fractions Worksheets 2nd Grade Math Worksheets First Grade Math Worksheets",
null,
"",
null,
"### 2nd Grade Math Review Worksheet Free Printable Educational Worksheet Math Review Worksheets 2nd Grade Math 2nd Grade Math Worksheets",
null,
"### Do You Carry The Ball 2nd Grade Math Worksheets Jumpstart 2nd Grade Math Free Math Worksheets 2nd Grade Math Worksheets",
null,
"### Https Encrypted Tbn0 Gstatic Com Images Q Tbn And9gctx6f54bgzq3vbobp Xjkivxxu2b7m0wwdbryxuskxuia0zsmbq Usqp Cau\n\nSource : pinterest.com"
] | [
null,
"https://i.pinimg.com/originals/50/28/c3/5028c3714855f529720e226f91f940a2.jpg",
null,
"https://i.pinimg.com/originals/76/d6/d9/76d6d9a2dba09f83479d6047d3e6588b.png",
null,
"https://i.pinimg.com/originals/28/9f/67/289f67448e2074911f3eb89633b7d203.jpg",
null,
"https://i.pinimg.com/originals/2b/ae/30/2bae3022e424e12149fb57b3b68815d5.jpg",
null,
"https://i.pinimg.com/originals/dd/24/61/dd2461e0a2a31431de994e5c1bb06619.png",
null,
"https://i.pinimg.com/736x/47/19/14/471914add20ee12bf5ecf7835f375248--mental-maths-worksheets-summer-worksheets.jpg",
null,
"https://i.pinimg.com/736x/6d/65/39/6d6539d5513296ff44f98820fda9f019.jpg",
null,
"https://i.pinimg.com/originals/75/0b/14/750b14f4e1ba9b99a2d1df597d959846.png",
null,
"https://i.pinimg.com/originals/33/56/79/3356793c06c37aba091f9560800e35c2.gif",
null,
"https://i.pinimg.com/originals/6c/0c/7b/6c0c7ba589b06932f083d560e21a51b5.jpg",
null,
"https://i.pinimg.com/originals/1f/31/a8/1f31a824747981b73b1c86480901a545.png",
null,
"https://i.pinimg.com/originals/44/c9/c0/44c9c0c177ddef7832abfa96b3da8d5a.gif",
null,
"https://i.pinimg.com/736x/9b/fb/40/9bfb402a2d46280a08dcf7fc63f2077c.jpg",
null,
"https://i.pinimg.com/originals/c5/b6/0f/c5b60fae10968e5a2b6b8ad676466ce2.gif",
null,
"https://i.pinimg.com/originals/27/2d/ac/272dace536ae93b7fd47d99200620caf.gif",
null,
"https://i.pinimg.com/564x/24/8f/79/248f793799369f33ca054e05be9bdbe2.jpg",
null,
"https://i.pinimg.com/originals/9e/a8/7c/9ea87ce826c9f958cb38421e1632fa42.jpg",
null,
"https://i.pinimg.com/originals/da/20/9c/da209c907721a31eac1c17f8250b8e09.png",
null,
"https://i.pinimg.com/originals/c8/2f/36/c82f3611e87f08c6fbdf5dba6a850750.jpg",
null,
"https://i.pinimg.com/originals/91/b3/66/91b366c7003ad561b76444940e734701.jpg",
null,
"https://i.pinimg.com/originals/3a/87/32/3a8732edbd3b3cffc8e708749fd9e89a.png",
null,
"https://i.pinimg.com/originals/f8/c2/eb/f8c2eb4c3dc0319a691b5bce2ad025e5.jpg",
null,
"https://i.pinimg.com/originals/3e/4f/24/3e4f24c9535b1ecac3e21a84f04c1d0d.jpg",
null,
"https://i.pinimg.com/originals/4c/8d/ff/4c8dff2aa3e9e185bdae5c134d884c6a.jpg",
null,
"https://i.pinimg.com/originals/fc/b8/11/fcb811f94819a1a4dafc6dc5ca7d51ec.gif",
null,
"https://i.pinimg.com/originals/47/2d/cb/472dcb96bf1c78119f88569f70ddd543.jpg",
null,
"https://i.pinimg.com/originals/c4/2f/14/c42f14c8185defc4fdfb9796baf4fd32.jpg",
null,
"https://i.pinimg.com/originals/26/2e/fc/262efc0d7400209deba67d675c9127ed.jpg",
null,
"https://i.pinimg.com/originals/9f/9b/ee/9f9bee9b32af5b7f1c606b216ba69247.jpg",
null,
"https://i.pinimg.com/originals/43/96/81/439681864160c0f8bc53e88e4389ea1c.jpg",
null,
"https://i.pinimg.com/736x/1c/3c/8d/1c3c8daa6b0757c520282d4cd440f5ab.jpg",
null,
"https://i.pinimg.com/564x/56/4e/a2/564ea23c8481bd4aef189b8e8ca8ebcf.jpg",
null,
"https://i.pinimg.com/originals/22/03/11/22031146944ad71ffa99f0c1c10ec524.jpg",
null,
"https://i.pinimg.com/originals/41/75/f4/4175f440265a2fea5bacce060d121f3c.png",
null,
"https://i.pinimg.com/originals/20/53/37/205337d0aebeb9ac9210c5fefa4aac85.jpg",
null,
"https://i.pinimg.com/736x/3b/64/32/3b6432e536b2e01b28f5240669668971.jpg",
null,
"https://i.pinimg.com/originals/2a/c6/10/2ac610ded914721f813066b7a1c91a82.png",
null,
"https://i.pinimg.com/736x/6d/65/39/6d6539d5513296ff44f98820fda9f019.jpg",
null,
"https://i.pinimg.com/736x/66/aa/ab/66aaabe5fce2c3a16a78dee9e3de28d9.jpg",
null,
"https://i.pinimg.com/originals/c0/0a/8d/c00a8daa126165e15f994ccfa2868187.jpg",
null,
"https://i.pinimg.com/originals/4e/5f/3e/4e5f3e145b305d0441078e9702fdbb4b.jpg",
null,
"https://i.pinimg.com/originals/2f/a0/81/2fa0810677698d2c8218cda6b51f9ceb.jpg",
null,
"https://i.pinimg.com/originals/a5/52/cd/a552cdcdbad67d1e1578ece6d8ea344f.png",
null,
"https://i.pinimg.com/originals/83/d7/3c/83d73caae80316b608ad5ac8c6e1b695.jpg",
null,
"https://i.pinimg.com/474x/ef/36/87/ef368783451c33a6aa0f2386c12481d6.jpg",
null,
"https://i.pinimg.com/originals/37/56/95/375695610937e305fc4c93e5fea617bf.jpg",
null,
"https://i.pinimg.com/originals/8b/ae/d4/8baed4390412d074311ff589d0dadb87.png",
null,
"https://i.pinimg.com/originals/fd/4e/a4/fd4ea4bc39ecaa560adda687323ec410.jpg",
null,
"https://help-eli.org/search",
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.86015636,"math_prob":0.44152272,"size":2926,"snap":"2021-21-2021-25","text_gpt3_token_len":563,"char_repetition_ratio":0.26522928,"word_repetition_ratio":0.0764045,"special_character_ratio":0.1787423,"punctuation_ratio":0.042462844,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.99533737,"pos_list":[0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98],"im_url_duplicate_count":[null,null,null,null,null,null,null,null,null,null,null,null,null,4,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,1,null,null,null,null,null,null,null,4,null,null,null,4,null,8,null,null,null,null,null,10,null,null,null,null,null,1,null,null,null,null,null,8,null,null,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2021-05-11T03:22:43Z\",\"WARC-Record-ID\":\"<urn:uuid:60722932-3d91-4e46-9913-a3e522f31d3f>\",\"Content-Length\":\"77469\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:9dcbc113-8f1c-4460-b375-0ee078f4637c>\",\"WARC-Concurrent-To\":\"<urn:uuid:f7d6c439-1d87-4eb2-ac1c-a246bba44fe5>\",\"WARC-IP-Address\":\"104.21.72.115\",\"WARC-Target-URI\":\"https://help-eli.org/free-printable-math-worksheets-for-2nd-grade.html\",\"WARC-Payload-Digest\":\"sha1:KBQSO2TAS5VWX2CLQ4XKW7F6XI2NQM67\",\"WARC-Block-Digest\":\"sha1:AV2WY3TLZ54ONUEZ447KODE3QEN4AVNE\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2021/CC-MAIN-2021-21/CC-MAIN-2021-21_segments_1620243991641.5_warc_CC-MAIN-20210511025739-20210511055739-00194.warc.gz\"}"} |
https://numbermatics.com/n/1468/ | [
"# 1468\n\n## 1,468 is an even composite number composed of two prime numbers multiplied together.\n\nWhat does the number 1468 look like?\n\nThis visualization shows the relationship between its 2 prime factors (large circles) and 6 divisors.\n\n1468 is an even composite number. It is composed of two distinct prime numbers multiplied together. It has a total of six divisors.\n\n## Prime factorization of 1468:\n\n### 22 × 367\n\n(2 × 2 × 367)\n\nSee below for interesting mathematical facts about the number 1468 from the Numbermatics database.\n\n### Names of 1468\n\n• Cardinal: 1468 can be written as One thousand, four hundred sixty-eight.\n\n### Scientific notation\n\n• Scientific notation: 1.468 × 103\n\n### Factors of 1468\n\n• Number of distinct prime factors ω(n): 2\n• Total number of prime factors Ω(n): 3\n• Sum of prime factors: 369\n\n### Divisors of 1468\n\n• Number of divisors d(n): 6\n• Complete list of divisors:\n• Sum of all divisors σ(n): 2576\n• Sum of proper divisors (its aliquot sum) s(n): 1108\n• 1468 is a deficient number, because the sum of its proper divisors (1108) is less than itself. Its deficiency is 360\n\n### Bases of 1468\n\n• Binary: 101101111002\n• Base-36: 14S\n\n### Squares and roots of 1468\n\n• 1468 squared (14682) is 2155024\n• 1468 cubed (14683) is 3163575232\n• The square root of 1468 is 38.3144881213\n• The cube root of 1468 is 11.3651547063\n\n### Scales and comparisons\n\nHow big is 1468?\n• 1,468 seconds is equal to 24 minutes, 28 seconds.\n• To count from 1 to 1,468 would take you about twenty-four minutes.\n\nThis is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)\n\n• A cube with a volume of 1468 cubic inches would be around 0.9 feet tall.\n\n### Recreational maths with 1468\n\n• 1468 backwards is 8641\n• The number of decimal digits it has is: 4\n• The sum of 1468's digits is 19\n• More coming soon!\n\nMLA style:\n\"Number 1468 - Facts about the integer\". Numbermatics.com. 2023. Web. 30 March 2023.\n\nAPA style:\nNumbermatics. (2023). Number 1468 - Facts about the integer. Retrieved 30 March 2023, from https://numbermatics.com/n/1468/\n\nChicago style:\nNumbermatics. 2023. \"Number 1468 - Facts about the integer\". https://numbermatics.com/n/1468/\n\nThe information we have on file for 1468 includes mathematical data and numerical statistics calculated using standard algorithms and methods. We are adding more all the time. If there are any features you would like to see, please contact us. Information provided for educational use, intellectual curiosity and fun!\n\nKeywords: Divisors of 1468, math, Factors of 1468, curriculum, school, college, exams, university, Prime factorization of 1468, STEM, science, technology, engineering, physics, economics, calculator, one thousand, four hundred sixty-eight.\n\nOh no. Javascript is switched off in your browser.\nSome bits of this website may not work unless you switch it on."
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.86197686,"math_prob":0.9468554,"size":2616,"snap":"2023-14-2023-23","text_gpt3_token_len":698,"char_repetition_ratio":0.112940274,"word_repetition_ratio":0.025943397,"special_character_ratio":0.3046636,"punctuation_ratio":0.16472869,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.98571074,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2023-03-30T14:47:29Z\",\"WARC-Record-ID\":\"<urn:uuid:2a9db348-64c1-469d-b63c-336657d5a0b4>\",\"Content-Length\":\"17164\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:d2ee5c17-e7a6-42a5-a301-6db50c7f86d0>\",\"WARC-Concurrent-To\":\"<urn:uuid:d1e04a41-c7e8-4e84-ab8a-1bdd208486f4>\",\"WARC-IP-Address\":\"72.44.94.106\",\"WARC-Target-URI\":\"https://numbermatics.com/n/1468/\",\"WARC-Payload-Digest\":\"sha1:CDACMA2OSYACXWWE3GHDNGVGZXS65IYZ\",\"WARC-Block-Digest\":\"sha1:CYX6S25JDMSWFGZAZ4GWJVD6SBC3IFMH\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2023/CC-MAIN-2023-14/CC-MAIN-2023-14_segments_1679296949331.26_warc_CC-MAIN-20230330132508-20230330162508-00735.warc.gz\"}"} |
https://proxies-free.com/nt-number-theory-a-novel-identity-connecting-permanents-to-bernoulli-numbers/ | [
"# nt.number theory – A novel identity connecting permanents to Bernoulli numbers\n\nFor a matrix $$(a_{j,k})_{1le j,kle n}$$ over a field, its permanent is defined by\n$$mathrm{per}(a_{j,k})_{1le j,kle n}:=sum_{piin S_n}prod_{j=1}^n a_{j,pi(j)}.$$\nIn a recent preprint of mine, I investigated arithmetic properties of some permanents.\n\nLet $$n$$ be a positive integer. I have proved that\n$$mathrm{per}left(leftlfloorfrac{j+k}nrightrfloorright)_{1le j,kle n}=2^{n-1}+1$$\nand that\n$$detleft(leftlfloorfrac{j+k}nrightrfloorright)_{1le j,kle n}=(-1)^{n(n+1)/2-1} qquadtext{if} n>1.$$\nwhere $$lfloor cdotrfloor$$ is the floor function. The proofs are relatively easy.\n\nRecall that the Bernoulli numbers $$B_0,B_1,ldots$$ are given by\n$$frac x{e^x-1}=sum_{n=0}^infty B_nfrac{x^n}{n!} (|x|<2pi).$$\nThose $$G_n=2(1-2^n)B_n (n=1,2,3,ldots)$$ are sometimes called Genocchi numbers.\n\nBased on my numerical computation, here I pose the following two conjectures.\n\nConjecture 1. For any positive integer $$n$$, we have\n$$mathrm{per}left(leftlfloorfrac{2j-k}nrightrfloorright)_{1le j,kle n}=2(2^{n+1}-1)B_{n+1}.tag{1}$$\n\nConjecture 2. For any positive integer $$n$$, we have\n$$detleft(leftlfloorfrac{2j-k}nrightrfloorright)_{1le j,kle n}=begin{cases}(-1)^{(n^2-1)/8}&text{if} 2nmid n,\\0&text{if} 2mid n.end{cases}tag{2}$$\n\nConjecture 2 seems easier than Conjecture 1.\n\nQUESTION. Are the identities $$(1)$$ and $$(2)$$ correct? How to prove them?"
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.5455444,"math_prob":0.99993694,"size":1348,"snap":"2021-31-2021-39","text_gpt3_token_len":512,"char_repetition_ratio":0.1235119,"word_repetition_ratio":0.041666668,"special_character_ratio":0.328635,"punctuation_ratio":0.13289036,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9999944,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2021-09-20T17:31:36Z\",\"WARC-Record-ID\":\"<urn:uuid:c9ef2e59-f8de-48db-94e3-1e1a7d64a4a6>\",\"Content-Length\":\"27875\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:9d7cdb37-c175-4eb5-9aaa-997a22fdd7f7>\",\"WARC-Concurrent-To\":\"<urn:uuid:e1ca32c6-12f2-48a2-a36e-922b654020b4>\",\"WARC-IP-Address\":\"173.212.203.156\",\"WARC-Target-URI\":\"https://proxies-free.com/nt-number-theory-a-novel-identity-connecting-permanents-to-bernoulli-numbers/\",\"WARC-Payload-Digest\":\"sha1:LCGZJFA7RXEMVDPMY4WJY7WC25CHJHE7\",\"WARC-Block-Digest\":\"sha1:YNXVPKSXNAF3FB5OC6QQJ3MRPPFSICHY\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2021/CC-MAIN-2021-39/CC-MAIN-2021-39_segments_1631780057083.64_warc_CC-MAIN-20210920161518-20210920191518-00295.warc.gz\"}"} |
https://www.jiskha.com/search?query=The+relative+amount+of+gold+in+an+alloy+is+commonly+expressed+in+units+of+carats.+Pure+gold+is+24+carats%2C+and+the+percentage+of+gold+in+an+alloy+is+given+as+a+percentage+of+this+value.+For+example%2C+an+alloy | [
"# The relative amount of gold in an alloy is commonly expressed in units of carats. Pure gold is 24 carats, and the percentage of gold in an alloy is given as a percentage of this value. For example, an alloy\n\n33,851 results\n1. ## Chemistry\n\nPure platinum is too soft to be used in jewelry because it scratches easily. To increase the hardness so that it can be used in jewelry, platinum is combined with other metals to form an alloy. To determine the amount of platinum in an alloy, a 7.804 g\n\n2. ## Chemistry\n\nDuralin is an alloy of aluminium containing 4.5% manganese, 3.5% copper, and 0.45% magnesium. How much magnesium is present in a 32 g sample of this alloy? Answer in units of mol\n\n3. ## math\n\nshanon needs 20g of 80% of gold to make a pendan. she has some 85% gold and some 70% gold, from broken jewelry and wants to know how much she should use. determine the quantity of each alloy that she should use.\n\n4. ## Physiology\n\nPure gold has a density of 19 g/ml. If you bought a gold ring and found it had a volume of 0.3 ml and it weighed 5.7 grams, is it real gold? Show me your calculation\n\n5. ## math\n\na metalworker has a metal alloy thay is 25% copper and another alloy that is 60% copper. how many kilograms of each alloy should the metalworker combine to create 90kg of a 53% coppet alloy\n\n6. ## Algebra\n\nA goldsmith has two gold alloys. The first alloy is 20% gold; the second alloy is 60% gold. How many grams of each should be mixed to produce 40 grams of an alloy that is 30% gold? amount of 20% gold_____g Amount of 60% gold_____g\n\n7. ## Chemistry\n\nA 2.35 g sample of a substance suspected of being pure gold is warmed to 72.2 ∘C and submerged into 15.5 g of water initially at 24.1 ∘C. The final temperature of the mixture is 26.5 ∘C. Part A What is the heat capacity of the unknown substance? Part\n\n8. ## algebra\n\nA goldsmith has two gold alloys. The first alloy is 30% gold; the second alloy is 80% gold. How many grams of each should be mixed to produce 10 grams of an alloy that is 40% gold? amount of 30% gold ___ g amount of 80% gold ___ g\n\n9. ## Physics\n\nArchimedes purportedly used his principle to verify that the king's crown was pure gold, by weighing the crown while it was submerged in water. Suppose the crown's actual weight was 14.0 N. The densities of gold, silver, and water are 19.3 g/cm^3, 10.5\n\n10. ## chemistry\n\nDuralin is an alloy of aluminium containing 4.5% manganese, 3.5% copper, and 0.45% magnesium. How much magnesium is present in a 90 g sample of this alloy? Answer in units of mol\n\nThe \"karat\" is a dimensionless unit that is used to indicate the proportion of gold in a gold-containing alloy. An alloy that is one karat gold contains a weight of pure gold that is one part in twenty-four. What is the volume of gold in a 20.0 karat gold\n\n12. ## Physics, still don't get it!\n\nThe \"karat\" is a dimensionless unit that is used to indicate the proportion of gold in a gold-containing alloy. An alloy that is one karat gold contains a weight of pure gold that is one part in twenty-four. What is the volume of gold in a 20.0 karat gold\n\n13. ## Science\n\nHow many number of gold atom are present in 0.6 gm of 18 carat gold.The 24 carat gold is taken as 100% pure gold.(atomic mass of gold=197a.m.u)\n\n14. ## physics\n\nShow that for 1 kg of pure gold the volume of water displaced is 51.8 cm^3 I know that the density of pure gold is 19.32 gm/cm^3 so 1 kg/19.32 gm/cm^3= 0.05175 ? I have come along way with this problem and feel like I am close, but now I need help. How do\n\n15. ## math\n\nAnne and Nancy use a metal alloy that is 20.45% copper to make jewelry. How many ounces of a 12% alloy must be mixed with a 25% alloy to form 100 ounces of the desired alloy?\n\n16. ## Algebra\n\nsolve linear equation-an alloy of metal is 25% copper. Another alloy is 50% copper. how much of each alloy should be used to make 1000 grams of an alloy that is 45% copper\n\n17. ## College Algebra\n\nA goldsmith has two gold alloys. The first alloy is 30% gold; the second alloy is 80% gold. How many grams of each should be mixed to produce 50 grams of an alloy that is 68% gold? amount of 30% gold ______grams amount of 80% gold ______grams\n\n18. ## Physics\n\nA piece of gold-aluminium alloy weighs 49N when suspended from a spring balance and submerged in water it weighs 39.2N what is the weight of Gold in the alloy if the specific gravity of gold is 19.3 and aluminium is 2.5?\n\n19. ## physics\n\na piece of gold aluminuim alloy weighs 100g in air and 80g in water.what is the weight of the gold in the alloy if the relative density of gold is 19.3 and that of aluminium is 2.5\n\n20. ## physics\n\nAccording to legend, to determine whether the king's crown was made of pure gold, Archimedes measured the crown's volume by determining how much water it displaced. The density of gold is 19.3 g/cm^3. If the crown's mass was 6.00 * 10^2g, what volume of\n\n21. ## math\n\nThe amount of gold jewelry and other products is measured in karats (K), where 24K represents pure gold. The mark 14K on a chain indicates that the ratio between the mass of the gold in the chain and the mass of the chain is . If a gold ring is marked 18K\n\n22. ## physics2 lab\n\na 50 g bracelet is suspected of being gold plated lead instead of pure gold.when it is dropped into a full glass of water,4cm of water overflows.is the bracelet pure gold?if not,what proportions of its mass is gold?determine also the amount of its\n\n23. ## Maths Percentage\n\nFind the percentage of pure gold in 22-carat gold, if 24-carat gold is 100% pure gold.\n\n24. ## Science\n\nCompounds with high melting points have ___ a. Covalent bonds b. Metallic Bonds c. Ionic bonds*** d. No chemical bonds How could you determine if a sample of gold is pure? Compare the sample's density with that of pure gold.*** Compare the sample's color\n\n25. ## Algebra/Math\n\nCan you show work por favor? :) A metalworker has a metal alloy that is 20% copper and another alloy that is 60% copper. How many kilograms of each alloy should be combined to create 80 kg of a 53% copper alloy?\n\n26. ## Chemistry\n\nThe relative amount of gold in an alloy is commonly expressed in units of carats. Pure gold is 24 carats, and the percentage of gold in an alloy is given as a percentage of this value. For example, an alloy that is 50 percent gold is 12 carats. State the\n\n27. ## Physics\n\nThe \"karat\" is a dimensionless unit that is used to indicate the proportion of gold in a gold-containing alloy. An alloy that is one karat gold contains a weight of pure gold that is one part in twenty-four. What is the volume of gold in a 20.0 karat gold\n\n28. ## physical science\n\nA 50.g bracelet is suspected pf being gold plated lead instead of pure gold. It was dropped into a full to the rim glass of water and 4cm to the third power overflowed. Is the the bracelet pure gold. Explain. (Density of gold=19 g/cm to the third power and\n\n29. ## ALGEBRA\n\nIf a jeweller wishes to form 12 ounces oif 75%pure gold from substances that arev 60% AND 80% pure gold .How much of each substances must be mixed together to produce this?\n\n30. ## Algebra 1 (Ms. Sue)\n\n1). Solve each equation. 17 = w - 4 2/3s = -6 1/3y + 1/4 = 5/12 x/8 - 1/2 = 6 5/6x - 1/3 = 5/2 2). In 1668, the Hope diamond was reduced from its original weight by about 45 carats, resulting in a diamond weighing about 67 carats. Write and solve an\n\n31. ## Chemistry\n\nFrom the jewelry descriptions given, select the homogeneous mixture or solution. Answer?? 10 carat (K) electroplated gold jewelry 24 carat (K) gold jewelry (i know this is pure gold) 18 carat (K) gold jewelry Are these right? CaCl2>>calcium chloride\n\n32. ## science\n\nPure gold has a density of 19.32 g/cm3. How large would a piece of gold be if it had a mass of 483 g?\n\n33. ## chemistry\n\nA 9.35 gram of ring with it's volume of 0.654 cm3 is an alloy of gold and with density of gold and silver respectively 19.3 g/cm3 and 10.5 g/cm3 assume there is no change in volume when pure metals are mixed. calculate volume of gold?\n\n34. ## Algebra 2\n\nThe purity of gold is measured in karats. Twenty-four karat gold is pure gold and k karat gold is k/24 gold by mass. One piece of 16-karat gld jewelry has a mass of 30 grams and another piece of 10-karat gold jewelry has a mass of 40 grams. Find the number\n\n35. ## Math (Word Problem into formula)\n\nA chemist is studying the properties of a bronze alloy (mixture) of copper and tin. She begins with 6 kg of an alloy that is one sixth tin. Keeping the amount of copper constant, she adds small amounts of tin to the alloy. Letting x be the total amount of\n\n36. ## Chemistry\n\nA mettallurgist decided to make a special alloy. He melted 30 grams of Au(Gold) with 30 grams of Pb. This melting process resulted to 42 grams of an Au-Pb alloy and some leftover Pb. This scientist wanted to make 420 grams of this alloy with no leftovers\n\n37. ## science\n\nhowmany number of gold atoms are present in 0.6 of 18 carat gold. 24 carat gold is taken as 100 % pure gold\n\n38. ## physics\n\nThe British Sovereign coin is an alloy of gold and copper having a total mass of 7.988 g and is 22-karat gold. (a) Find the mass of gold in kg using that # of karats = 24 x (mass of gold)/(total mass). (b) Calculate the volumes of gold and copper used to\n\n39. ## difference between 10k, 14k, 18k gold\n\nI am in the process of ordering a class ring and the options for the gold are 10K, 14K, and 18K. I know the price is different, but I was just wondering if anybody knows if you can actually tell a difference between them when you look at them or do they\n\n40. ## maths word problem help!\n\nA and B are two alloys of gold and copper,prepared by mixing metals in the ratio 7:2 and 7:11 respectively.if equal quantity of alloys are melted to form a third alloy C.find the ratio of gold and C show working thanks GOD bless\n\n41. ## math\n\njewelry marked 14 karat gold is 14/24 pure gold. what is the percent\n\n42. ## Physics\n\nThe karat is a dimensionless unit that is used to indicate the proportion of gold in a gold-containing alloy. An alloy that is one karat gold contains a weight of pure gold that is one part in twenty-four. What is the volume of gold in a 20.0-karat gold\n\n43. ## chemistry\n\nA 14 karat gold alloy contains 58% m/m gold. How much of this alloy can a jeweler make using 50.0 g of pure gold?\n\nThe amount of gold jewelry and other products is measured in karats (K), where 24K represents pure gold. The mark 14K on a chain indicates that the ratio between the mass of the gold in the chain and the mass of the chain is 14:24 If a gold ring is marked\n\n45. ## Chemistry 101\n\nA crown is determine to weigh 2.65 kg. When this crown is submerged in a full basin of water, the overflow is found to be 145 mL. Is the crown pure gold or a gold-silver alloy? The density of silver is 10.5 g/mL and gold that of gold is 19.3 g/mL. Show\n\n46. ## Chemistry 101\n\nA crown is determine to weigh 2.65 kg. When this crown is submerged in a full basin of water, the overflow is found to be 145 mL. Is the crown pure gold or a gold-silver alloy? The density of silver is 10.5 g/mL and gold that of gold is 19.3 g/mL\n\n47. ## Chemistry\n\nA homogenous mixture of metals is called an alloy. An alloy is found to be 30% by volume gold with the rest being aluminum. Aluminum has a density of 2.70 g/cm³. Gold has a density of 13.1 g/cm³. If a piece of alloy contains 3.70 lbs. of gold, how many\n\n48. ## chemistry\n\nA 9.35 gram of ring with it's volume of 0.654 cm3 is an alloy of gold and with density of gold and silver respectively 19.3 g/cm3 and 10.5 g/cm3 assume there is no change in volume when pure metals are mixed. The volume of gold is?\n\n49. ## Algebra\n\nThe purity of gold is measured in karats. Twenty-four karat gold is pure gold and k karat gold is k/24 gold by mass. One piece of 16-karat gold jewelry has a mass of 30 grams and another piece of 10-karat gold jewelry has a mass of 40 grams. Find the\n\n50. ## Chemistry\n\nA street merchant is trying to sell you a 14 karat (24 karat is 100% pure) bracelet for \\$450. The gold is alloyed with copper. Before buying the item, you weigh it to be 110 grams and you also measure its water displacement as 7.59 mL. What is the %\n\n51. ## college algebra word problem\n\nA goldsmith has two alloys that are different purities of gold. The first is 3/4 pure and the second is 5/12 pure. How many ounces of each should be melted and mixed in order to obtain a 6 oz mixture that is 2/3 pure gold?\n\n52. ## physics\n\nthe relative density of an alloy is 6.5.find the mass of the solid alloy cube of side 20cm.what volume of the alloy has a mass of 13kg\n\n53. ## CHEMISTRYYYY HELP\n\nA sample of gold ore contains 22.0 g of gold metal per 100kg of ore. If gold has a market value of \\$350.00 per oz., what mass of ore, in tons, must be refined to get one million dollars worth of pure gold?\n\n54. ## Physics\n\nThe relative density of an alloy is 6.5.a.find the mass of a solid cube of side 20cm.b.what volume of the alloy has a mass of 13kg\n\nSolve the problem. Anne and Nancy use a metal alloy that is 24.9% copper to make jewelry. How many ounces of a 20% alloy must be mixed with a 27% alloy to form 100 ounces of the desired alloy?\n\n56. ## College Pre Calculus\n\nanne and nancy use a metal alloy that is 19.3% copper to make jewelry. how many ounces of a 19% alloy must be mixed with a 20% alloy to form 110 ounces of the desired alloy?\n\n57. ## physics honors\n\nSuppose that pure gold was to be made into a very long, thin wire for high-end stereo systems. (Gold is often used because it does not oxidize so it makes very good electrical contacts). If the gold wire was to have a radius of 0.01 cm, how long of a wire\n\n58. ## Physics\n\nAn alloy of copper and gold displaces 1.935 cm^3 of water. It has a mass of 33.44g. If gold has a density of 19.3g/cm^3 and copper has a density of 8.9g/cm^3, what is the percent of gold by mass in the object?\n\n59. ## physics\n\nn alloy of copper and gold displaces 1.935 cm^3 of water. It has a mass of 33.44g. If gold has a density of 19.3g/cm^3 and copper has a density of 8.9g/cm^3, what is the percent of gold by mass in the objec\n\n60. ## college algebra\n\na chemist has two alloys one of which is 5% gold and 15% lead and the other of which is 25% gold and 30% lead how many grams of each of the two alloys should be used to make an alloy that contains 40g of gold and 93g of lead ?\n\n61. ## chemistry\n\nFrom the jewelry descriptions given, select the homogeneous mixture or solution. Answer?? 10 carat (K) electroplated gold jewelry 24 carat (K) gold jewelry (i know this is pure gold) 18 carat (K) gold jewelry Are these right? CaCl2>>calcium chloride\n\n62. ## Chemistry\n\nA 15g sample of what appears to be gold that was heated from 22 degrees C to 39 degrees C, required 26.3 J of energy. If the specific heat of gold is .129 J/(g x degrees C), is the metal pure gold? Defend your answer with calculations.\n\n63. ## science\n\npure gold is highly malleable. describe a use og gold when this property is not desirable\n\nHow to get pure gold from impure gold..please specify the chemical equation.. any example is fine,e.g. AuCl3 -> Au\n\n65. ## Chemistry\n\nA 2.6 g of a substance that looks like gold needed 9.4 J of heat energy to raise its temperature from 20 to 38 ºC. Is the metal pure gold?\n\n66. ## Chemistry\n\nDiamonds are measured in carats, and 1 carat=0.200g. The density of diamonds is 3.51g/cm3. what is the volume of a 5.0-carat diamond, expressed in liters?\n\n67. ## s.h.s chemistry\n\nwhich has a higher melting point pure gold or impure gold\n\n68. ## math\n\njewelry marked 14 karat gold is 14/25 pure gold. what is the percent\n\n69. ## Chemistry\n\nThe density of pure gold is 19.3 g/centimeter cube. A quantity of what appears to be gold has a mass of 465 grams and a volume of 26.5 mL. Is the substance likely to be pure gold? please tell me how you got your answer. Thanks! density = mass/volume You\n\n70. ## chem\n\ngold hasa density of 19 g/cm^3 if an 18 inch necklace is made of pure gold how much would it weigh in grams if it is 1 cm wide and 1 mm thick\n\n71. ## chemistry\n\nA 4.90 g nugget of pure gold absorbed 255 J of heat. What was the final temperature of the gold if the initial temperature was 24.0°C? The specific heat of gold is 0.129 J/(g·°C).\n\n72. ## Chem\n\nPure gold adopts a face-centered cubic crystal structure. It also has a density of 19.30g/mL. What is the edge length of gold's unit cell? What is the atomic radius of gold? I understand how to do this problem the other way: when you have the unit cell and\n\n73. ## chemistry\n\nIt is observed that when solid copper is added to a solution containing gold ions, the copper dissolves and the gold precipitates. Similarly, almost every other metal will displace gold from solutions of gold salts. a. Do these results mean that the gold\n\n74. ## algebra\n\nassume that a jeweler needs 80 grams of an alloy that is 30% gold. He has avaliable one alloy that is 5% gold and another that is 85% gold; he will mix some of each If x equal the number of grams of the first alloy (so the number of grams of the second is\n\n75. ## Chemistry\n\nA piece of metal alloy (a solution of metals) is made of gold and silver. It is 20% by mass silver. An irregularly shaped piece of this alloy contains 0.356 lb of gold. When the alloy is added to a graduated cylinder that contains 31.55 mL of alcohol, the\n\n76. ## math\n\nHow many ounces of an alloy containing 30% gold on the world market must be added to 10 ounces of an alloy containing 5% to produce an alloy containing 20% gold?\n\n77. ## maths\n\nIn 60 ounces of alloy for watch cases there are 20 ounces of gold.how much copper must be added to the alloy so that a watch case weighing 4 ounces,made from the new alloy,will contain 1 ounce of gold.......answer is 20 ounces\n\n78. ## College Algebra - Chemistry\n\nA goldsmith has two gold alloys. The first alloy is 25% gold and the second is 55% gold. How many grams of each should be mixed to produce 40 grams of an alloy that is 43%?\n\n79. ## Math\n\nThe amounts by weight of gold, silver and lead in three alloys of these metals are in the ratio 1:5:3 in the first alloy, 2:3:4 in the second and 5:2:2 in the third. How many kg of the first alloy must be used to obtain 10kg of an alloy containing equal\n\n80. ## algebra\n\na jeweler purchased 5 oz of a gold alloy and 20 oz of a silver alloy for a total cost of \\$540. The next day at the same price per ounce, the jeweler purchased 4 oz of th egold alloy and 25 oz of the silver alloy for a total cost of \\$450. Find the cost per\n\n81. ## chemistry\n\nArchimedes used density along with mass and volume of alloys (mixtures) of gold and silver to determine the percent of gold (and also silver) in these alloys by simple, non-destructive measurements. Prove that the mass of gold in a given mass of silver\n\n82. ## physics\n\nThe relative Density of an alloy is 65.(a) find the mass of a solid alloy cube of side 20cm.(b) what vol of the alloy has a mass of 13kg? Please explain in details\n\n83. ## physics\n\nthe relative density of an alloy is 6.5.find the mass of the solid alloy cube of side 20cm.what volume of the alloy has a mass of 13kg\n\n84. ## Physics\n\nThe relative density of an alloy is 6.5,calculate the mass of the solid alloy cube of sides 20cm.what volume of alloy has a mass of 3kg\n\n85. ## Chemistry\n\nNovember's birthstone is citrine, a yellow member of the quartz family. It is primarily silicon dioxide, but small amounts of iron(III) ions give it its yellow color. A high quality citrine containing about 0.040 moles of SiO2 costs around \\$225. If this\n\n86. ## algebra\n\nA chemist has x grams of an alloy that is 20% silver and 10% gold, and y grams of an alloy that is 25% silver and 30% gold. Express the number of grams of gold in the two allows in terms of x and y.\n\n87. ## Chemistry\n\nAn alloy contains 39.5 mass% silver (Ag) and has density og 7.86 g/ml What volume of alloy would be needed to contain 12.0g of pure Ag?\n\n88. ## problem solving\n\nYou purchased 18 karat gold chain that weights 15 grams. How much gold did you purchase in grams? In carats? (1 carat=0/2 grams)\n\n89. ## math\n\na diamond weighing 2.5 carats was cut into two pieces. The two pieces were put on a balance scale, one on each side. An additional weight of 0.9 carats on one side was required to maintain balance. Find the weight, in carats, of the larger piece\n\n90. ## Chemistry\n\nTo assay silver content in an alloy, a 13.38 g sample of alloy was dissolved in nitric acid. The addition of 0.53 molar sodium chloride resulted in the precipitation of silver chloride. If the alloy were pure silver, what volume of sodium chloride is\n\n91. ## algebra\n\nSolve the problem. Anne and Nancy use a metal alloy that is 24.9% copper to make jewelry. How many ounces of a 20% alloy must be mixed with a 27% alloy to form 100 ounces of the desired alloy?\n\n92. ## math\n\nAnne and Nancy use a metal alloy that is 23.5% copper to make jewelry. How many ounces of a 21% alloy must be mixed with a 30% alloy to form 108 ounces of the desired alloy?\n\n93. ## Physics\n\n9. A lump of gold sample is suspected to have a mass of 500g and is found to have a relative den of 5.2 Find what mass of gold is present in the sample If the relative den of gold and aluminium are 19.3 and 2.6\n\n94. ## Math\n\nThere are two alloys consisting of zinc, copper and tin. The first alloy contains 25% zinc and the second alloy contains 50% copper. The percentage of tin in the first alloy is twice that in the second alloy. 200 kg of the first alloy and 300 kg of the\n\n95. ## Definitions....\n\nWhat is pure liquid? What is impure liquid? Thx You are going to have to define these in context. \"Pure\" is a relative term. For instance, the term \"pure\" water...is it really pure? It depends on the definition of pure being used. Pure liquid could mean\n\n96. ## Chemistry\n\nHow many grams silver is added to 13 grams gold to produce 85% gold alloy?\n\n97. ## Chemistry\n\nHow many grams silver is added to 13 grams gold to produce 85% gold alloy?\n\n98. ## Chemistry\n\nHow many grams silver is added to 13 grams gold to produce 85% gold alloy?\n\n99. ## Honors chemistry\n\ni am doing a project for school and i was told to research the alloy of 16 carat gold. I have found all the other information that i need, but i cannot find the melting or boiling point of 16 carat gold! please help soon my project is due tomorrow.\n\n100. ## science\n\nis there any alloy which is equally dense with gold?"
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.9243675,"math_prob":0.9182098,"size":21791,"snap":"2020-45-2020-50","text_gpt3_token_len":5889,"char_repetition_ratio":0.1889659,"word_repetition_ratio":0.28787163,"special_character_ratio":0.27483824,"punctuation_ratio":0.09462276,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9680105,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2020-12-04T11:47:10Z\",\"WARC-Record-ID\":\"<urn:uuid:bba96b99-f5d4-49fc-92cf-37d8ef721513>\",\"Content-Length\":\"66951\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:f1209883-b68e-413e-ae6a-df01877edfa9>\",\"WARC-Concurrent-To\":\"<urn:uuid:5fde4f58-28aa-4bb7-8e82-e4f43f1ff9d0>\",\"WARC-IP-Address\":\"66.228.55.50\",\"WARC-Target-URI\":\"https://www.jiskha.com/search?query=The+relative+amount+of+gold+in+an+alloy+is+commonly+expressed+in+units+of+carats.+Pure+gold+is+24+carats%2C+and+the+percentage+of+gold+in+an+alloy+is+given+as+a+percentage+of+this+value.+For+example%2C+an+alloy\",\"WARC-Payload-Digest\":\"sha1:Y5LGETI7I5C3SLUZOS7ZDS3FM7IS7SQL\",\"WARC-Block-Digest\":\"sha1:4JMU2H7NNGKJATQZRKT2RDV2WAROAUOM\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2020/CC-MAIN-2020-50/CC-MAIN-2020-50_segments_1606141735600.89_warc_CC-MAIN-20201204101314-20201204131314-00414.warc.gz\"}"} |
https://www.litscape.com/word_analysis/unsoiled | [
"# Definition of unsoiled\n\n## \"unsoiled\" in the adjective sense\n\n### 1. unsoiled, unspotted, unstained\n\nwithout soil or spot or stain\n\nSource: WordNet® (An amazing lexical database of English)\n\nPrinceton University \"About WordNet®.\"\nWordNet®. Princeton University. 2010.\n\nView WordNet® License\n\n# unsoiled in Scrabble®\n\nThe word unsoiled is playable in Scrabble®, no blanks required. Because it is longer than 7 letters, you would have to play off an existing word or do it in several moves.\n\nUNSOILED\n(90)\nUNSOILED\n(90)\n\n## Seven Letter Word Alert: (4 words)\n\nelusion, indoles, nodules, unoiled\n\nUNSOILED\n(90)\nUNSOILED\n(90)\nUNSOILED\n(60)\nUNSOILED\n(60)\nUNSOILED\n(36)\nUNSOILED\n(36)\nUNSOILED\n(33)\nUNSOILED\n(30)\nUNSOILED\n(30)\nUNSOILED\n(30)\nUNSOILED\n(30)\nUNSOILED\n(30)\nUNSOILED\n(24)\nUNSOILED\n(24)\nUNSOILED\n(24)\nUNSOILED\n(22)\nUNSOILED\n(22)\nUNSOILED\n(22)\nUNSOILED\n(22)\nUNSOILED\n(22)\nUNSOILED\n(22)\nUNSOILED\n(22)\nUNSOILED\n(22)\nUNSOILED\n(20)\nUNSOILED\n(20)\nUNSOILED\n(20)\nUNSOILED\n(20)\nUNSOILED\n(20)\nUNSOILED\n(20)\nUNSOILED\n(20)\nUNSOILED\n(18)\nUNSOILED\n(18)\nUNSOILED\n(18)\nUNSOILED\n(18)\nUNSOILED\n(15)\nUNSOILED\n(13)\nUNSOILED\n(13)\nUNSOILED\n(13)\nUNSOILED\n(13)\nUNSOILED\n(13)\nUNSOILED\n(12)\nUNSOILED\n(12)\nUNSOILED\n(11)\nUNSOILED\n(11)\nUNSOILED\n(11)\nUNSOILED\n(11)\n\nUNSOILED\n(90)\nUNSOILED\n(90)\nINDOLES\n(82 = 32 + 50)\nUNOILED\n(82 = 32 + 50)\nNODULES\n(82 = 32 + 50)\nUNOILED\n(80 = 30 + 50)\nINDOLES\n(80 = 30 + 50)\nNODULES\n(80 = 30 + 50)\nELUSION\n(78 = 28 + 50)\nUNOILED\n(77 = 27 + 50)\nUNOILED\n(77 = 27 + 50)\nINDOLES\n(77 = 27 + 50)\nINDOLES\n(77 = 27 + 50)\nINDOLES\n(77 = 27 + 50)\nINDOLES\n(77 = 27 + 50)\nUNOILED\n(77 = 27 + 50)\nUNOILED\n(77 = 27 + 50)\nNODULES\n(77 = 27 + 50)\nUNOILED\n(77 = 27 + 50)\nINDOLES\n(77 = 27 + 50)\nUNOILED\n(77 = 27 + 50)\nINDOLES\n(77 = 27 + 50)\nNODULES\n(77 = 27 + 50)\nNODULES\n(77 = 27 + 50)\nNODULES\n(77 = 27 + 50)\nNODULES\n(77 = 27 + 50)\nINDOLES\n(77 = 27 + 50)\nNODULES\n(77 = 27 + 50)\nUNOILED\n(77 = 27 + 50)\nNODULES\n(77 = 27 + 50)\nUNOILED\n(74 = 24 + 50)\nELUSION\n(74 = 24 + 50)\nELUSION\n(74 = 24 + 50)\nINDOLES\n(74 = 24 + 50)\nELUSION\n(74 = 24 + 50)\nELUSION\n(74 = 24 + 50)\nELUSION\n(74 = 24 + 50)\nELUSION\n(74 = 24 + 50)\nNODULES\n(74 = 24 + 50)\nINDOLES\n(74 = 24 + 50)\nNODULES\n(74 = 24 + 50)\nELUSION\n(74 = 24 + 50)\nELUSION\n(74 = 24 + 50)\nINDOLES\n(72 = 22 + 50)\nUNOILED\n(72 = 22 + 50)\nNODULES\n(72 = 22 + 50)\nELUSION\n(71 = 21 + 50)\nINDOLES\n(70 = 20 + 50)\nUNOILED\n(70 = 20 + 50)\nINDOLES\n(70 = 20 + 50)\nINDOLES\n(70 = 20 + 50)\nUNOILED\n(70 = 20 + 50)\nUNOILED\n(70 = 20 + 50)\nUNOILED\n(70 = 20 + 50)\nUNOILED\n(70 = 20 + 50)\nUNOILED\n(70 = 20 + 50)\nNODULES\n(70 = 20 + 50)\nNODULES\n(70 = 20 + 50)\nUNOILED\n(70 = 20 + 50)\nNODULES\n(70 = 20 + 50)\nINDOLES\n(70 = 20 + 50)\nNODULES\n(70 = 20 + 50)\nINDOLES\n(70 = 20 + 50)\nNODULES\n(70 = 20 + 50)\nUNOILED\n(68 = 18 + 50)\nELUSION\n(68 = 18 + 50)\nINDOLES\n(68 = 18 + 50)\nNODULES\n(68 = 18 + 50)\nNODULES\n(68 = 18 + 50)\nNODULES\n(68 = 18 + 50)\nNODULES\n(68 = 18 + 50)\nNODULES\n(68 = 18 + 50)\nNODULES\n(68 = 18 + 50)\nELUSION\n(68 = 18 + 50)\nELUSION\n(68 = 18 + 50)\nELUSION\n(68 = 18 + 50)\nUNOILED\n(68 = 18 + 50)\nINDOLES\n(68 = 18 + 50)\nINDOLES\n(68 = 18 + 50)\nINDOLES\n(68 = 18 + 50)\nUNOILED\n(68 = 18 + 50)\nINDOLES\n(68 = 18 + 50)\nUNOILED\n(68 = 18 + 50)\nINDOLES\n(68 = 18 + 50)\nUNOILED\n(68 = 18 + 50)\nELUSION\n(68 = 18 + 50)\nINDOLES\n(68 = 18 + 50)\nUNOILED\n(68 = 18 + 50)\nELUSION\n(68 = 18 + 50)\nNODULES\n(68 = 18 + 50)\nNODULES\n(66 = 16 + 50)\nNODULES\n(66 = 16 + 50)\nINDOLES\n(66 = 16 + 50)\nINDOLES\n(66 = 16 + 50)\nINDOLES\n(66 = 16 + 50)\nINDOLES\n(66 = 16 + 50)\nINDOLES\n(66 = 16 + 50)\nNODULES\n(66 = 16 + 50)\nNODULES\n(66 = 16 + 50)\nNODULES\n(66 = 16 + 50)\nUNOILED\n(66 = 16 + 50)\nUNOILED\n(66 = 16 + 50)\nELUSION\n(66 = 16 + 50)\nELUSION\n(66 = 16 + 50)\nELUSION\n(66 = 16 + 50)\nUNOILED\n(66 = 16 + 50)\nELUSION\n(66 = 16 + 50)\nELUSION\n(66 = 16 + 50)\nELUSION\n(66 = 16 + 50)\nELUSION\n(66 = 16 + 50)\nUNOILED\n(66 = 16 + 50)\nELUSION\n(66 = 16 + 50)\nUNOILED\n(66 = 16 + 50)\nELUSION\n(64 = 14 + 50)\nELUSION\n(64 = 14 + 50)\nINDOLES\n(64 = 14 + 50)\nUNOILED\n(64 = 14 + 50)\nELUSION\n(64 = 14 + 50)\nELUSION\n(64 = 14 + 50)\nNODULES\n(64 = 14 + 50)\nELUSION\n(64 = 14 + 50)\nINDOLES\n(62 = 12 + 50)\nNODULES\n(62 = 12 + 50)\nUNOILED\n(62 = 12 + 50)\nNODULES\n(62 = 12 + 50)\nUNOILED\n(62 = 12 + 50)\nINDOLES\n(62 = 12 + 50)\nUNOILED\n(62 = 12 + 50)\nUNOILED\n(62 = 12 + 50)\nNODULES\n(62 = 12 + 50)\nINDOLES\n(62 = 12 + 50)\nUNOILED\n(61 = 11 + 50)\nNODULES\n(61 = 11 + 50)\nELUSION\n(61 = 11 + 50)\nINDOLES\n(61 = 11 + 50)\nELUSION\n(61 = 11 + 50)\nNODULES\n(61 = 11 + 50)\nELUSION\n(61 = 11 + 50)\nINDOLES\n(61 = 11 + 50)\nINDOLES\n(61 = 11 + 50)\nNODULES\n(61 = 11 + 50)\nNODULES\n(60 = 10 + 50)\nNODULES\n(60 = 10 + 50)\nELUSION\n(60 = 10 + 50)\nNODULES\n(60 = 10 + 50)\nUNSOILED\n(60)\nNODULES\n(60 = 10 + 50)\nNODULES\n(60 = 10 + 50)\nUNSOILED\n(60)\nUNOILED\n(60 = 10 + 50)\nUNOILED\n(60 = 10 + 50)\nUNOILED\n(60 = 10 + 50)\nINDOLES\n(60 = 10 + 50)\nUNOILED\n(60 = 10 + 50)\nINDOLES\n(60 = 10 + 50)\nINDOLES\n(60 = 10 + 50)\nUNOILED\n(60 = 10 + 50)\nINDOLES\n(60 = 10 + 50)\nELUSION\n(60 = 10 + 50)\nUNOILED\n(60 = 10 + 50)\nINDOLES\n(60 = 10 + 50)\nELUSION\n(59 = 9 + 50)\nUNOILED\n(59 = 9 + 50)\nNODULES\n(59 = 9 + 50)\nELUSION\n(59 = 9 + 50)\nELUSION\n(59 = 9 + 50)\nELUSION\n(59 = 9 + 50)\nELUSION\n(59 = 9 + 50)\nELUSION\n(59 = 9 + 50)\nELUSION\n(59 = 9 + 50)\nINDOLES\n(59 = 9 + 50)\nELUSION\n(58 = 8 + 50)\nUNSOILED\n(36)\nUNSOILED\n(36)\nUNSOILED\n(33)\nUNSOILED\n(30)\nUNSOILED\n(30)\nUNSOILED\n(30)\nUNSOILED\n(30)\nUNSOILED\n(30)\nUNSOLD\n(27)\nINDOLE\n(27)\nUNDOES\n(27)\nOLDIES\n(27)\nSOULED\n(27)\nSOILED\n(27)\nUNDIES\n(27)\nNODULE\n(27)\nLOUSED\n(27)\nINODES\n(27)\nNOISED\n(27)\nNUDIES\n(27)\nNUDIES\n(24)\nOILED\n(24)\nNOSED\n(24)\nNOISED\n(24)\nNOISED\n(24)\nDIONE\n(24)\nNUDIES\n(24)\nNUDIES\n(24)\n\n# unsoiled in Words With Friends™\n\nThe word unsoiled is playable in Words With Friends™, no blanks required. Because it is longer than 7 letters, you would have to play off an existing word or do it in several moves.\n\nNODULES\n(92 = 57 + 35)\nUNOILED\n(92 = 57 + 35)\n\n## Seven Letter Word Alert: (4 words)\n\nelusion, indoles, nodules, unoiled\n\nUNSOILED\n(84)\nUNSOILED\n(84)\nUNSOILED\n(60)\nUNSOILED\n(56)\nUNSOILED\n(56)\nUNSOILED\n(54)\nUNSOILED\n(54)\nUNSOILED\n(54)\nUNSOILED\n(48)\nUNSOILED\n(48)\nUNSOILED\n(48)\nUNSOILED\n(48)\nUNSOILED\n(48)\nUNSOILED\n(42)\nUNSOILED\n(32)\nUNSOILED\n(32)\nUNSOILED\n(32)\nUNSOILED\n(32)\nUNSOILED\n(28)\nUNSOILED\n(28)\nUNSOILED\n(28)\nUNSOILED\n(28)\nUNSOILED\n(28)\nUNSOILED\n(28)\nUNSOILED\n(26)\nUNSOILED\n(26)\nUNSOILED\n(24)\nUNSOILED\n(24)\nUNSOILED\n(24)\nUNSOILED\n(24)\nUNSOILED\n(24)\nUNSOILED\n(24)\nUNSOILED\n(24)\nUNSOILED\n(24)\nUNSOILED\n(20)\nUNSOILED\n(18)\nUNSOILED\n(18)\nUNSOILED\n(18)\nUNSOILED\n(17)\nUNSOILED\n(17)\nUNSOILED\n(17)\nUNSOILED\n(16)\nUNSOILED\n(16)\nUNSOILED\n(16)\nUNSOILED\n(16)\nUNSOILED\n(16)\nUNSOILED\n(15)\nUNSOILED\n(15)\nUNSOILED\n(15)\nUNSOILED\n(15)\nUNSOILED\n(15)\nUNSOILED\n(14)\nUNSOILED\n(14)\nUNSOILED\n(14)\nUNSOILED\n(14)\nUNSOILED\n(13)\nUNSOILED\n(13)\nUNSOILED\n(13)\n\nNODULES\n(92 = 57 + 35)\nUNOILED\n(92 = 57 + 35)\nNODULES\n(86 = 51 + 35)\nNODULES\n(86 = 51 + 35)\nUNOILED\n(86 = 51 + 35)\nNODULES\n(86 = 51 + 35)\nUNOILED\n(86 = 51 + 35)\nUNSOILED\n(84)\nUNSOILED\n(84)\nELUSION\n(83 = 48 + 35)\nINDOLES\n(83 = 48 + 35)\nINDOLES\n(83 = 48 + 35)\nELUSION\n(83 = 48 + 35)\nINDOLES\n(83 = 48 + 35)\nELUSION\n(83 = 48 + 35)\nNODULES\n(80 = 45 + 35)\nUNOILED\n(80 = 45 + 35)\nUNOILED\n(80 = 45 + 35)\nUNOILED\n(80 = 45 + 35)\nNODULES\n(80 = 45 + 35)\nNODULES\n(80 = 45 + 35)\nUNOILED\n(80 = 45 + 35)\nUNOILED\n(79 = 44 + 35)\nNODULES\n(79 = 44 + 35)\nNODULES\n(79 = 44 + 35)\nUNOILED\n(79 = 44 + 35)\nNODULES\n(79 = 44 + 35)\nUNOILED\n(79 = 44 + 35)\nINDOLES\n(77 = 42 + 35)\nELUSION\n(77 = 42 + 35)\nINDOLES\n(77 = 42 + 35)\nELUSION\n(77 = 42 + 35)\nELUSION\n(77 = 42 + 35)\nELUSION\n(75 = 40 + 35)\nINDOLES\n(75 = 40 + 35)\nINDOLES\n(75 = 40 + 35)\nELUSION\n(75 = 40 + 35)\nINDOLES\n(75 = 40 + 35)\nELUSION\n(75 = 40 + 35)\nNODULES\n(74 = 39 + 35)\nNODULES\n(74 = 39 + 35)\nUNOILED\n(74 = 39 + 35)\nUNOILED\n(74 = 39 + 35)\nUNOILED\n(74 = 39 + 35)\nNODULES\n(74 = 39 + 35)\nINDOLES\n(71 = 36 + 35)\nINDOLES\n(71 = 36 + 35)\nELUSION\n(71 = 36 + 35)\nINDOLES\n(71 = 36 + 35)\nELUSION\n(71 = 36 + 35)\nINDOLES\n(71 = 36 + 35)\nELUSION\n(71 = 36 + 35)\nINDOLES\n(71 = 36 + 35)\nELUSION\n(71 = 36 + 35)\nUNOILED\n(65 = 30 + 35)\nNODULES\n(65 = 30 + 35)\nUNOILED\n(65 = 30 + 35)\nUNOILED\n(65 = 30 + 35)\nNODULES\n(65 = 30 + 35)\nNODULES\n(65 = 30 + 35)\nUNOILED\n(65 = 30 + 35)\nINDOLES\n(63 = 28 + 35)\nINDOLES\n(63 = 28 + 35)\nELUSION\n(63 = 28 + 35)\nELUSION\n(63 = 28 + 35)\nINDOLES\n(63 = 28 + 35)\nELUSION\n(63 = 28 + 35)\nUNOILED\n(61 = 26 + 35)\nNODULES\n(61 = 26 + 35)\nUNOILED\n(61 = 26 + 35)\nUNOILED\n(61 = 26 + 35)\nNODULES\n(61 = 26 + 35)\nNODULES\n(61 = 26 + 35)\nUNOILED\n(61 = 26 + 35)\nNODULES\n(61 = 26 + 35)\nUNOILED\n(61 = 26 + 35)\nUNOILED\n(61 = 26 + 35)\nNODULES\n(61 = 26 + 35)\nNODULES\n(61 = 26 + 35)\nUNSOILED\n(60)\nINDOLES\n(59 = 24 + 35)\nELUSION\n(59 = 24 + 35)\nINDOLES\n(59 = 24 + 35)\nUNOILED\n(59 = 24 + 35)\nELUSION\n(59 = 24 + 35)\nUNOILED\n(59 = 24 + 35)\nINDOLES\n(59 = 24 + 35)\nINDOLES\n(59 = 24 + 35)\nELUSION\n(59 = 24 + 35)\nNODULES\n(59 = 24 + 35)\nNODULES\n(59 = 24 + 35)\nELUSION\n(59 = 24 + 35)\nELUSION\n(59 = 24 + 35)\nINDOLES\n(59 = 24 + 35)\nNODULES\n(59 = 24 + 35)\nELUSION\n(59 = 24 + 35)\nINDOLES\n(59 = 24 + 35)\nELUSION\n(57 = 22 + 35)\nUNOILED\n(57 = 22 + 35)\nELUSION\n(57 = 22 + 35)\nUNOILED\n(57 = 22 + 35)\nUNOILED\n(57 = 22 + 35)\nINDOLES\n(57 = 22 + 35)\nUNOILED\n(57 = 22 + 35)\nNODULES\n(57 = 22 + 35)\nNODULES\n(57 = 22 + 35)\nNODULES\n(57 = 22 + 35)\nINDOLES\n(57 = 22 + 35)\nUNOILED\n(57 = 22 + 35)\nNODULES\n(57 = 22 + 35)\nNODULES\n(57 = 22 + 35)\nELUSION\n(57 = 22 + 35)\nINDOLES\n(57 = 22 + 35)\nUNOILED\n(57 = 22 + 35)\nNODULES\n(57 = 22 + 35)\nUNOILED\n(57 = 22 + 35)\nNODULES\n(57 = 22 + 35)\nUNSOILED\n(56)\nUNSOILED\n(56)\nINDOLES\n(55 = 20 + 35)\nELUSION\n(55 = 20 + 35)\nINDOLES\n(55 = 20 + 35)\nELUSION\n(55 = 20 + 35)\nELUSION\n(55 = 20 + 35)\nINDOLES\n(55 = 20 + 35)\nELUSION\n(55 = 20 + 35)\nELUSION\n(55 = 20 + 35)\nINDOLES\n(55 = 20 + 35)\nELUSION\n(55 = 20 + 35)\nINDOLES\n(55 = 20 + 35)\nINDOLES\n(55 = 20 + 35)\nELUSION\n(55 = 20 + 35)\nINDOLES\n(55 = 20 + 35)\nNODULES\n(54 = 19 + 35)\nNODULE\n(54)\nNODULES\n(54 = 19 + 35)\nUNSOILED\n(54)\nUNSOILED\n(54)\nUNSOILED\n(54)\nUNOILED\n(54 = 19 + 35)\nINDOLES\n(53 = 18 + 35)\nELUSION\n(53 = 18 + 35)\nNODULES\n(52 = 17 + 35)\nUNOILED\n(52 = 17 + 35)\nUNOILED\n(52 = 17 + 35)\nUNOILED\n(52 = 17 + 35)\nUNOILED\n(52 = 17 + 35)\nNODULES\n(52 = 17 + 35)\nUNOILED\n(52 = 17 + 35)\nSOULED\n(51)\nINDOLES\n(51 = 16 + 35)\nUNOILED\n(51 = 16 + 35)\nNODULES\n(51 = 16 + 35)\nLUNIES\n(51)\nNUDIES\n(51)\nELUSION\n(51 = 16 + 35)\nELUSION\n(51 = 16 + 35)\nUNDIES\n(51)\nINDOLES\n(51 = 16 + 35)\nELUSION\n(51 = 16 + 35)\nLOUSED\n(51)\nUNOILED\n(51 = 16 + 35)\nUNDOES\n(51)\nNODULES\n(51 = 16 + 35)\nINDOLES\n(51 = 16 + 35)\nNODULES\n(50 = 15 + 35)\nNODULES\n(50 = 15 + 35)\nNODULES\n(50 = 15 + 35)\nUNOILED\n(50 = 15 + 35)\nUNOILED\n(50 = 15 + 35)\nELUSION\n(50 = 15 + 35)\nUNOILED\n(50 = 15 + 35)\nNODULES\n(50 = 15 + 35)\nNODULES\n(50 = 15 + 35)\nNODULES\n(50 = 15 + 35)\nNODULES\n(49 = 14 + 35)\nNODULES\n(49 = 14 + 35)\nNODULES\n(49 = 14 + 35)\nNODULES\n(49 = 14 + 35)\nELUSION\n(49 = 14 + 35)\nNODULES\n(49 = 14 + 35)\nNODULES\n(49 = 14 + 35)\nINDOLES\n(49 = 14 + 35)\nNODULES\n(49 = 14 + 35)\nINDOLES\n(49 = 14 + 35)\nINDOLES\n(49 = 14 + 35)\nINDOLES\n(49 = 14 + 35)\nINDOLES\n(49 = 14 + 35)\nUNOILED\n(49 = 14 + 35)\nUNOILED\n(49 = 14 + 35)\nUNOILED\n(49 = 14 + 35)\nELUSION\n(49 = 14 + 35)\nINDOLES\n(49 = 14 + 35)\nUNOILED\n(49 = 14 + 35)\nELUSION\n(49 = 14 + 35)\nUNOILED\n(49 = 14 + 35)\nUNOILED\n(49 = 14 + 35)\nINDOLES\n(48 = 13 + 35)\nINDOLES\n(48 = 13 + 35)\nELUSION\n(48 = 13 + 35)\n\n# Word Growth involving unsoiled\n\nled oiled soiled\n\noil oiled soiled\n\noil soil soiled\n\nso soil soiled\n\nun\n\n## Longer words containing unsoiled\n\n(No longer words found)"
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.69259655,"math_prob":1.0000082,"size":254,"snap":"2021-04-2021-17","text_gpt3_token_len":68,"char_repetition_ratio":0.148,"word_repetition_ratio":0.0,"special_character_ratio":0.22047244,"punctuation_ratio":0.1904762,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9999683,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2021-04-22T13:58:05Z\",\"WARC-Record-ID\":\"<urn:uuid:88d38679-e8d1-4e4a-b1f3-7875f1fbf9ba>\",\"Content-Length\":\"160883\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:fbaa008b-0af6-4feb-803d-6cc5a73f64b4>\",\"WARC-Concurrent-To\":\"<urn:uuid:4f681c06-a4a0-49be-bb9b-8399983daa28>\",\"WARC-IP-Address\":\"104.21.48.109\",\"WARC-Target-URI\":\"https://www.litscape.com/word_analysis/unsoiled\",\"WARC-Payload-Digest\":\"sha1:DMYENJEIHEHFHKTZ3UY7VEPGZ3IEPFL2\",\"WARC-Block-Digest\":\"sha1:23VMLP5CGIGXRIYDJ4YLT3A63VEA2IH7\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2021/CC-MAIN-2021-17/CC-MAIN-2021-17_segments_1618039610090.97_warc_CC-MAIN-20210422130245-20210422160245-00379.warc.gz\"}"} |
https://tex.stackexchange.com/questions/226500/draw-a-dual-time-representation-diagram | [
"# draw a dual time representation diagram\n\nDoes anybody know how to draw a dual time representation in a professional way? Any suggestions for how to do it with LaTeX or other software?",
null,
"This is an attempt where two block styles are defined, one with sharp corners and the other with rounded corners. Here varwidth and enumerate environments from varwith and enumitem packages are used to provide some flexibility.",
null,
"Code\n\n\\documentclass{article}\n\\usepackage[margin=1cm]{geometry}\n\\usepackage[latin1]{inputenc}\n\\usepackage{tikz}\n\\usetikzlibrary{shapes,arrows,positioning}\n\\usepackage{varwidth,enumitem,amsmath}\n\\setlist[enumerate]{labelindent=2pt,leftmargin=*}\n\n\\begin{document}\n\\begin{tikzpicture}[auto,\nblock/.style ={rectangle, draw=black, thick, fill=white,align=left,execute at begin node=\\footnotesize,outer sep=0pt,},\nblockrc/.style ={rectangle, draw=black, thick, fill=white, rounded corners,align=left,execute at begin node=\\footnotesize,outer sep=0pt},\nmyarr/.style={->,>=latex'}\n]\n\\node [block] (diag1) {\n\\begin{varwidth}{3cm}\n\\baselineskip=2pt\n\\begin{enumerate}\n\\item[1.] Attend to stimulus sorce, push the buttom marked with green tape and more and more\n\\end{enumerate}\n\\end{varwidth}\n};\n\\node [right = 0.5cm of diag1,blockrc,] (1a) {\\begin{varwidth}{2.5cm}\n\\baselineskip=2pt\n\\begin{enumerate}\n\\item[1a.] Be aware of locations. Green locations\n\\end{enumerate}\n\\end{varwidth}};\n\\node[block,anchor=north west] at (diag1.south east)(diag2)\n{\\begin{varwidth}{2cm}\n\\baselineskip=2pt\n\\begin{enumerate}\n\\item[2.] Intertrial internal\\\\ of \\\\duration\n\\end{enumerate}\n\\end{varwidth}\n};\n\\node [right= 0.5cm of diag2, blockrc] (2a) {\\begin{varwidth}{2cm}\n\\baselineskip=2pt\n\\begin{enumerate}\n\\item[2a.] Attend stimulus souce\n\\end{enumerate}\n\\end{varwidth}};\n\n%--- repeated diagonal entries\n\\node[block,anchor=north west] at (diag2.south east)(diag3)\n{\\begin{varwidth}{2cm}\n\\baselineskip=2pt\n\\begin{enumerate}\n\\item[3.] Stimulus light appears\n$i=1$ (green)\n$i=2$ (red)\n\\end{enumerate}\n\\end{varwidth}\n};\n\\node [right= 0.5cm of diag3, blockrc] (3a) {%\n\\begin{varwidth}{2cm}\n\\baselineskip=2pt\n\\begin{enumerate}\n\\item[3a.] Attend stimulus souce\n\\end{enumerate}\n\\end{varwidth}\n};\n\n\\node [below right= 0.2cm and 0.1cm of 3a, blockrc] (3b) {%\n\\begin{varwidth}{1.5cm}\n\\baselineskip=2pt\n\\begin{enumerate}\n\\item[3b.] Some text here.\n\\end{enumerate}\n\\end{varwidth}\n};\n\n\\node [below right= 0.2cm and 0.1cm of 3b, blockrc] (3c) {%\n\\begin{varwidth}{1.5cm}\n\\baselineskip=2pt\n\\begin{enumerate}\n\\item[3c.] Some text here\n\\end{enumerate}\n\\end{varwidth}\n};\n\n\\node [below right= 0.2cm and 0.1cm of 3c, blockrc] (3d) {%\n\\begin{varwidth}{1.5cm}\n\\baselineskip=2pt\n\\begin{enumerate}\n\\item[3d.] Some text here.\n\\end{enumerate}\n\\end{varwidth}\n};\n\n\\node [below right= 0.2cm and 0.1cm of 3d, blockrc] (3e) {%\n\\begin{varwidth}{1.5cm}\n\\baselineskip=2pt\n\\begin{enumerate}\n\\item[3e.] Some text here\n\\end{enumerate}\n\\end{varwidth}\n};\n\n% last diagonal entry\n\\node[block,anchor=north west] at ([shift={(7cm,-4.5cm)}]diag3.south east)(diag4)\n{\\begin{varwidth}{1.5cm}\n\\baselineskip=2pt\n\\begin{enumerate}[leftmargin=*]\n\\item[4.] Push buttom $j$\n\\end{enumerate}\n\\end{varwidth}\n};\n\n% draw lines\n\n\\draw[myarr] (diag1.east)--(1a.west);\n\\draw[myarr] (diag2.east)--(2a.west);\n\\draw[myarr] (diag3.east)--(3a.west);\n\\draw[dashed,myarr] (diag3.south east)--(diag4.north west);\n\n\\draw[myarr] ([xshift=1cm]1a.south)--([xshift=1cm]1a.south |- 2a.north);\n\\draw[myarr] (diag2.east)--(2a.west);\n\\draw[myarr] (diag3.east)--(3a.west);\n\\draw[myarr] (3e.south)--(3e.south |- diag4.north);\n\\foreach \\t in{a,b,c,d,e}{\n\\draw[myarr,rounded corners] (1a.east)-|(3\\t.north);\n}\n\\foreach \\f/\\t in{a/b,b/c,c/d,d/e}{\n\\draw[myarr,rounded corners] (3\\f.east)-|(3\\t.north);\n}\n\n\\draw[-] (diag1.south east) -- ++ (0,-8.5cm)coordinate(a)\n(diag2.south east) -- ++ (0,-8cm)coordinate(b)\n(diag4.south west) -- ++ (0,-1cm)coordinate(c);\n\\draw[<->,>=latex'] (a)--node[midway]{Choice of RT}([yshift=0.5cm]c);\n\\node[block,draw=none] [below right = 0.2cm and -1.7cm of diag4]{\n\\left . \\begin{aligned} &\\mathtt{Correct:}\\, i=j\\\\ &\\mathtt{Error:}\\, i \\neq j \\end{aligned} \\right \\}\\Rightarrow \\mathtt{\\%Errors}};\n\\node[block,draw=none] [above=1ex of diag1]{INSTRUCTIONS};\n\\node[block,draw=none] [below=1ex of diag1]{\\small Hand locations is\\\\ counterbalanced};\n\\node[block,draw=none] [above=1ex of 1a]{ Reinforced by \\\\ practice trials};\n\\node[block,draw=none] [below=1ex of diag2]{ \\small Varies \\\\ randomly\\\\ over 4,6,8};\n\\end{tikzpicture}\n\\end{document}\n\n• Wow, thank you. I should discover it line by line :-) – Ehsan Masoudi Feb 5 '15 at 12:49\n\nHave a look at tikz, e.g. these examples:\n\nEdit: ok,hope this helps:\n\n\\begin{tikzpicture}\n\\node[rounded corners=3pt, draw](n1) at (0,0) {Main Node};\n\\node[rounded corners=3pt, draw](n2) at (2,-1){Node x};\n\\node[rounded corners=3pt, draw](n3) at (3,-2) {Node y};\n\\node[rounded corners=3pt, draw](n4) at (4,-3) {Node z};\n\n\\draw[rounded corners] (n1) -- (2,0) -- (n2);\n\\draw[rounded corners] (n1) -- (3,0) -- (n3);\n\\draw[rounded corners] (n1) -- (4,0) -- (n4);\n\\end{tikzpicture}"
] | [
null,
"https://i.stack.imgur.com/EOhod.png",
null,
"https://i.stack.imgur.com/M1sbi.jpg",
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.5047161,"math_prob":0.99062884,"size":5425,"snap":"2021-04-2021-17","text_gpt3_token_len":1940,"char_repetition_ratio":0.16380742,"word_repetition_ratio":0.15714286,"special_character_ratio":0.3212903,"punctuation_ratio":0.19465649,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.99513036,"pos_list":[0,1,2,3,4],"im_url_duplicate_count":[null,1,null,2,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2021-01-23T05:41:55Z\",\"WARC-Record-ID\":\"<urn:uuid:5c8811a5-4eab-4ef3-a7c2-6d2a4a7738db>\",\"Content-Length\":\"161181\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:c901bdef-4f29-46f9-9bba-f81a006a8203>\",\"WARC-Concurrent-To\":\"<urn:uuid:08c2484f-295b-4c98-b77b-f0b7756fb565>\",\"WARC-IP-Address\":\"151.101.193.69\",\"WARC-Target-URI\":\"https://tex.stackexchange.com/questions/226500/draw-a-dual-time-representation-diagram\",\"WARC-Payload-Digest\":\"sha1:PRRMS2CR4QTOIZF6TIQVQBHA5ILYTRA3\",\"WARC-Block-Digest\":\"sha1:IWG25C5ICW4HJWGIPBXNJPAX4ACTCBRU\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2021/CC-MAIN-2021-04/CC-MAIN-2021-04_segments_1610703533863.67_warc_CC-MAIN-20210123032629-20210123062629-00465.warc.gz\"}"} |
https://encyclopediaofmath.org/wiki/Homogeneous_function | [
"# Homogeneous function\n\nof degree $\\lambda$\n\nA function $f$ such that for all points $( x _ {1} \\dots x _ {n} )$ in its domain of definition and all real $t > 0$, the equation\n\n$$f ( t x _ {1} \\dots t x _ {n} ) = \\ t ^ \\lambda f ( x _ {1} \\dots x _ {n} )$$\n\nholds, where $\\lambda$ is a real number; here it is assumed that for every point $( x _ {1} \\dots x _ {n} )$ in the domain of $f$, the point $( t x _ {1} \\dots t x _ {n} )$ also belongs to this domain for any $t > 0$. If\n\n$$f ( x _ {1} \\dots x _ {n} ) = \\ \\sum _ {0 \\leq k _ {1} + \\dots + k _ {n} \\leq m } a _ {k _ {1} \\dots k _ {n} } x _ {1} ^ {k _ {1} } \\dots x _ {n} ^ {k _ {n} } ,$$\n\nthat is, $f$ is a polynomial of degree not exceeding $m$, then $f$ is a homogeneous function of degree $m$ if and only if all the coefficients $a _ {k _ {1} \\dots k _ {n} }$ are zero for $k _ {1} + \\dots + k _ {n} < m$. The concept of a homogeneous function can be extended to polynomials in $n$ variables over an arbitrary commutative ring with an identity.\n\nSuppose that the domain of definition $E$ of $f$ lies in the first quadrant, $x _ {1} > 0 \\dots x _ {n} > 0$, and contains the whole ray $( t x _ {1} \\dots t x _ {n} )$, $t > 0$, whenever it contains $( x _ {1} \\dots x _ {n} )$. Then $f$ is homogeneous of degree $\\lambda$ if and only if there exists a function $\\phi$ of $n- 1$ variables, defined on the set of points of the form $( x _ {2} / x _ {1} \\dots x _ {n} / x _ {1} )$ where $( x _ {1} \\dots x _ {n} ) \\in E$, such that for all $( x _ {1} \\dots x _ {n} ) \\in E$,\n\n$$f ( x _ {1} \\dots x _ {n} ) = \\ x _ {1} ^ \\lambda \\phi \\left ( { \\frac{x _ 2}{x _ 1} } \\dots { \\frac{x _ n}{x _ 1} } \\right ) .$$\n\nIf the domain of definition $E$ of $f$ is an open set and $f$ is continuously differentiable on $E$, then the function is homogeneous of degree $\\lambda$ if and only if for all $( x _ {1} \\dots x _ {n} )$ in its domain of definition it satisfies the Euler formula\n\n$$\\sum _ { i= } 1 ^ { n } x _ {i} \\frac{\\partial f ( x _ {1} \\dots x _ {n} ) }{\\partial x _ {i} } = \\ \\lambda f ( x _ {1} \\dots x _ {n} ) .$$\n\nHow to Cite This Entry:\nHomogeneous function. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=Homogeneous_function&oldid=47253\nThis article was adapted from an original article by L.D. Kudryavtsev (originator), which appeared in Encyclopedia of Mathematics - ISBN 1402006098. See original article"
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.5928323,"math_prob":0.9999858,"size":2270,"snap":"2020-34-2020-40","text_gpt3_token_len":816,"char_repetition_ratio":0.23565754,"word_repetition_ratio":0.31175467,"special_character_ratio":0.4581498,"punctuation_ratio":0.058333334,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":1.0000098,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2020-09-21T03:09:48Z\",\"WARC-Record-ID\":\"<urn:uuid:c685ffdc-5fff-4487-9b71-668fb675c25e>\",\"Content-Length\":\"15943\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:2b54309a-8fec-43f5-97c4-1b7f364aa5cb>\",\"WARC-Concurrent-To\":\"<urn:uuid:2e15441c-4558-416d-bc06-4d350e38be9f>\",\"WARC-IP-Address\":\"34.96.94.55\",\"WARC-Target-URI\":\"https://encyclopediaofmath.org/wiki/Homogeneous_function\",\"WARC-Payload-Digest\":\"sha1:7EL4MRA5VXQYOW5KAIEJI6HL636DHW3H\",\"WARC-Block-Digest\":\"sha1:EUQI2EYKXQQFKBNT3HXU2KCGNJLWXWEF\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2020/CC-MAIN-2020-40/CC-MAIN-2020-40_segments_1600400198887.3_warc_CC-MAIN-20200921014923-20200921044923-00349.warc.gz\"}"} |
https://www.nagwa.com/en/worksheets/949159806192/ | [
"In this worksheet, we will practice reading, writing, and modeling addition expressions with numbers up to 10 and representing addition using the plus sign.\n\nQ1:\n\nWhat is ?",
null,
"Q2:\n\nWhich of the following matches the sum ?\n\n• A",
null,
"• B",
null,
"• C",
null,
"• D",
null,
"• E",
null,
"Q3:\n\nFind the matching sum for the following:",
null,
"• A\n• B\n• C\n• D\n• E\n\nQ4:\n\nCount to find 2 plus 4.",
null,
"Q5:\n\nCount to find the total.",
null,
"Q6:\n\nFind the missing number: There are dogs in the picture.",
null,
"Q7:\n\nWhich of the following pictures matches ?\n\n• A",
null,
"• B",
null,
"• C",
null,
"• D",
null,
"• E",
null,
"Q8:\n\nFind the matching sum for the following:",
null,
"• A\n• B\n• C\n• D\n• E\n\nQ9:\n\nLook at what Scarlett did.",
null,
"She knows she can write addition sentences to match the part-whole model.",
null,
"Pick the addition sentences that match what she says.",
null,
"• A\n• B",
null,
"• A\n• B",
null,
"• A\n• B\n\nQ10:\n\nIn the morning, you see 3 airplanes. In the afternoon, you see 5 more airplanes.",
null,
"Find the sum that tells you the total number of airplanes you saw.\n\n• A\n• B\n• C\n\nQ11:\n\nWhat is ?",
null,
"• A",
null,
"• B",
null,
"• C",
null,
"Q12:\n\nHow many flowers are there?",
null,
"Q13:\n\nHow many ducks are there?",
null,
"Q14:\n\nAdd 3 and 2 to find the total number.",
null,
"Q15:\n\nWhat is ?",
null,
"• A",
null,
"• B",
null,
"• C",
null,
"Q16:\n\nWhat is ?",
null,
"• A",
null,
"• B",
null,
"• C",
null,
"Q17:\n\nWhat is ?",
null,
"Q18:\n\nWhat is ?",
null,
"• A",
null,
"• B",
null,
"• C",
null,
"Q19:\n\nWhat is ?",
null,
""
] | [
null,
"https://images.nagwa.com/figures/149120842408/1.svg",
null,
"https://images.nagwa.com/figures/619126021856/5.svg",
null,
"https://images.nagwa.com/figures/619126021856/2.svg",
null,
"https://images.nagwa.com/figures/619126021856/1.svg",
null,
"https://images.nagwa.com/figures/619126021856/4.svg",
null,
"https://images.nagwa.com/figures/619126021856/3.svg",
null,
"https://images.nagwa.com/figures/394161359126/1.svg",
null,
"https://images.nagwa.com/figures/950154063581/1.svg",
null,
"https://images.nagwa.com/figures/310176071841/1.svg",
null,
"https://images.nagwa.com/figures/672196768242/1.svg",
null,
"https://images.nagwa.com/figures/539142326412/4.svg",
null,
"https://images.nagwa.com/figures/539142326412/2.svg",
null,
"https://images.nagwa.com/figures/539142326412/1.svg",
null,
"https://images.nagwa.com/figures/539142326412/5.svg",
null,
"https://images.nagwa.com/figures/539142326412/3.svg",
null,
"https://images.nagwa.com/figures/638140214793/1.svg",
null,
"https://images.nagwa.com/figures/468149706756/1.svg",
null,
"https://images.nagwa.com/figures/468149706756/2.svg",
null,
"https://images.nagwa.com/figures/468149706756/3.svg",
null,
"https://images.nagwa.com/figures/468149706756/4.svg",
null,
"https://images.nagwa.com/figures/468149706756/5.svg",
null,
"https://images.nagwa.com/figures/527183969853/1.svg",
null,
"https://images.nagwa.com/figures/686150692368/1.svg",
null,
"https://images.nagwa.com/figures/686150692368/2.svg",
null,
"https://images.nagwa.com/figures/686150692368/4.svg",
null,
"https://images.nagwa.com/figures/686150692368/3.svg",
null,
"https://images.nagwa.com/figures/752136308219/1.svg",
null,
"https://images.nagwa.com/figures/767151458723/1.svg",
null,
"https://images.nagwa.com/figures/879196875895/1.svg",
null,
"https://images.nagwa.com/figures/272178048095/1.svg",
null,
"https://images.nagwa.com/figures/272178048095/2.svg",
null,
"https://images.nagwa.com/figures/272178048095/3.svg",
null,
"https://images.nagwa.com/figures/272178048095/4.svg",
null,
"https://images.nagwa.com/figures/364125025027/1.svg",
null,
"https://images.nagwa.com/figures/364125025027/4.svg",
null,
"https://images.nagwa.com/figures/364125025027/3.svg",
null,
"https://images.nagwa.com/figures/364125025027/2.svg",
null,
"https://images.nagwa.com/figures/430120928385/1.svg",
null,
"https://images.nagwa.com/figures/525170348432/1.svg",
null,
"https://images.nagwa.com/figures/525170348432/2.svg",
null,
"https://images.nagwa.com/figures/525170348432/3.svg",
null,
"https://images.nagwa.com/figures/525170348432/4.svg",
null,
"https://images.nagwa.com/figures/575178487069/1.svg",
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.88140637,"math_prob":0.81771684,"size":851,"snap":"2019-51-2020-05","text_gpt3_token_len":271,"char_repetition_ratio":0.16765054,"word_repetition_ratio":0.30366492,"special_character_ratio":0.33019978,"punctuation_ratio":0.16842106,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9967768,"pos_list":[0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86],"im_url_duplicate_count":[null,2,null,2,null,2,null,2,null,2,null,2,null,2,null,2,null,2,null,2,null,2,null,2,null,2,null,2,null,2,null,2,null,2,null,2,null,2,null,2,null,2,null,2,null,2,null,2,null,2,null,2,null,2,null,2,null,2,null,2,null,2,null,2,null,2,null,2,null,2,null,2,null,2,null,2,null,2,null,2,null,2,null,2,null,2,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2020-01-18T20:50:22Z\",\"WARC-Record-ID\":\"<urn:uuid:9da54663-550f-499c-933b-fd05aaf668db>\",\"Content-Length\":\"62032\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:301e8ea1-0f13-4dcc-ada4-955bbd5fdaf9>\",\"WARC-Concurrent-To\":\"<urn:uuid:fddcebba-cc0f-44fb-951e-ebed8d3b75c3>\",\"WARC-IP-Address\":\"34.204.113.110\",\"WARC-Target-URI\":\"https://www.nagwa.com/en/worksheets/949159806192/\",\"WARC-Payload-Digest\":\"sha1:CTKYTMHWO3FI6N3FVX5OSRDF73QYKETU\",\"WARC-Block-Digest\":\"sha1:NFGIPCVPB3YC5E2ESTMCERSQT2CZKSPG\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2020/CC-MAIN-2020-05/CC-MAIN-2020-05_segments_1579250593937.27_warc_CC-MAIN-20200118193018-20200118221018-00067.warc.gz\"}"} |
https://www.bennadel.com/blog/3292-using-percent-for-in-line-styles-in-angular-4-2-3.htm | [
"On User Experience (UX) Design, JavaScript, ColdFusion, Node.js, Life, and Love.\n\n# Using % (Percent) For In-Line Styles In Angular 4.2.3\n\nBy on\n\nThis is a super minor post; but, I just used the \"%\" (percent) symbol for in-line styles in Angular 4.2.3, and it totally worked. It's just another example of how the Angular template syntax is such a joy to work with. Little things like CSS unit-selection become friction-free tasks. No more messing around with string interpolation or string concatenation - just select the unit of measurement and apply the length value.\n\nThis is barely worth sharing, since this functionality is all in the Angular documentation. But, the Angular template syntax makes me so happy, I can't help but want to be a share-bear. When defining an in-line style, the unit of measurement can be provided as part of the attribute name. Here, we're using the \"px\" - pixel - unit:\n\n<p [style.width.px]=\"someValue\"> ... </p>\n\nIt's that easy! And here, we're using the \"%\" - percent - unit:\n\n<p [style.width.%]=\"someValue\"> ... </p>\n\nDoesn't that just make you smile? To see this in action, I've created a small demo in which I use a variety of CSS units to render the same numeric value:\n\n• // Import the core angular services.\n• import { Component } from \"@angular/core\";\n•\n• @Component({\n• selector: \"my-app\",\n• styleUrls: [ \"./app.component.css\" ],\n• template:\n• `\n• <p class=\"actions\">\n• <strong>Values:</strong>\n•\n• <ng-template ngFor let-i [ngForOf]=\"[ 0, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100 ]\">\n•\n• <a (click)=\"setValue( i )\" [class.selected]=\"( i === value )\">\n• {{ i }}\n• </a>\n•\n• </ng-template>\n• </p>\n•\n• <p class=\"bar\" [style.width.%]=\"value\">\n• {{ value }} % <span>percentage relative to parent container</span>\n• </p>\n•\n• <p class=\"bar\" [style.width.px]=\"value\">\n• {{ value }} px <span>absolute pixel</span>\n• </p>\n•\n• <p class=\"bar\" [style.width.em]=\"value\">\n• {{ value }} em <span>the calculated font-size of the element</span>\n• </p>\n•\n• <p class=\"bar\" [style.width.ex]=\"value\">\n• {{ value }} ex <span>the x-height of the elements font</span>\n• </p>\n•\n• <p class=\"bar\" [style.width.vh]=\"value\">\n• {{ value }} vh <span>1% of the height of viewports initial containing block</span>\n• </p>\n•\n• <p class=\"bar\" [style.width.vw]=\"value\">\n• {{ value }} vw <span>1% of the width of viewports initial containing block</span>\n• </p>\n•\n• <p class=\"bar\" [style.width.vmin]=\"value\">\n• {{ value }} vmin <span>the smaller of vw or vh</span>\n• </p>\n•\n• <p class=\"bar\" [style.width.vmax]=\"value\">\n• {{ value }} vmax <span>the larger of vw or vh</span>\n• </p>\n•\n• <p class=\"bar\" [style.width.mm]=\"value\">\n• {{ value }} mm <span>millimeter</span>\n• </p>\n•\n• <p class=\"bar\" [style.width.cm]=\"value\">\n• {{ value }} cm <span>centimeter</span>\n• </p>\n•\n• <p class=\"bar\" [style.width.in]=\"value\">\n• {{ value }} in <span>inch</span>\n• </p>\n•\n• <p class=\"bar\" [style.width.pt]=\"value\">\n• {{ value }} pt\n• </p>\n•\n• <p class=\"bar\" [style.width.pc]=\"value\">\n• {{ value }} pc\n• </p>\n•\n• <p class=\"bar\" [style.width.ch]=\"value\">\n• {{ value }} ch\n• </p>\n•\n• <p class=\"bar\" [style.width.rem]=\"value\">\n• {{ value }} rem\n• </p>\n•\n• <h2>\n• These dont seem to work in Chrome.\n• </h2>\n•\n• <p class=\"bar\" [style.width.cap]=\"value\">\n• {{ value }} cap <span>the \"cap height\" (nominal height of capital letters) of the elements font</span>\n• </p>\n•\n• <p class=\"bar\" [style.width.ic]=\"value\">\n• {{ value }} ic\n• </p>\n•\n• <p class=\"bar\" [style.width.lh]=\"value\">\n• {{ value }} lh <span>the computed value of the line-height property of the element on which it is used</span>\n• </p>\n•\n• <p class=\"bar\" [style.width.rlh]=\"value\">\n• {{ value }} rlh\n• </p>\n•\n• <p class=\"bar\" [style.width.vi]=\"value\">\n• {{ value }} vi\n• </p>\n•\n• <p class=\"bar\" [style.width.vb]=\"value\">\n• {{ value }} vb\n• </p>\n•\n• <p class=\"bar\" [style.width.q]=\"value\">\n• {{ value }} q <span>quarter of a millimeter</span>\n• </p>\n• `\n• })\n• export class AppComponent {\n•\n• public value: number;\n•\n•\n• // I initialize the app component.\n• constructor() {\n•\n• this.value = 50;\n•\n• }\n•\n•\n• // ---\n• // PUBLIC METHODS.\n• // ---\n•\n•\n• // I set the value used to display the various dimensional units.\n• public setValue( value: number ) : void {\n•\n• this.value = value;\n•\n• }\n•\n• }\n\nAs you can see, each P tag is rendering the same \"value\" component property. But, each P tag uses a different unit of measurement for its in-line style. And, when we run this code, you can see how each unit affects the rendering:",
null,
"So cool!\n\nWhen you first see the Angular template syntax, it's a little jaring. Kind of like the first time you see JSX in ReactJS. But, once you start using it, the Angular template syntax just brings joy. Being able to use CSS units, like \"%\", with your in-line styles is just one example of this holistic design.",
null,
"You know what, it may be in the documentation, but I hadn't seen it used like that before. That is pretty cool that you can straight up use .% and it works as you would expect it to. There's a lot of little things I feel like they got right the second time around with Angular. And those \"little things\" make a difference.",
null,
"@John,\n\nAgreed! And, as much documentation as there is, little things are not always well articulated. For example, the documentation doesn't ever explicitly say that you can use \"%\". Instead, it just says you can use CSS units. So, it takes some mental gymnastics to get from that statement to actually trying to see if \"%\" works :)\n\nThat said, I really do like the Angular 2 template syntax. Much to like.",
null,
"Thanks Ben, one more time you save me a lot of time :)",
null,
"Thank you !",
null,
"Glad you are all liking this -- it's so easy, I love it!",
null,
"",
null,
""
] | [
null,
"https://www.bennadel.com/resources/uploads/2017/inline-style-unit-of-measurement-angular4.png",
null,
"https://www.gravatar.com/avatar/d8ea827f7b8b0d3a267f52a91eb31361",
null,
"https://www.gravatar.com/avatar/f9bbc701ca6770ef482cc1e172344e25",
null,
"https://www.gravatar.com/avatar/02f36fed209aa9fd52e629c47fd717f4",
null,
"https://www.gravatar.com/avatar/fe894c8c737aa802c671fb26cd7cc4b5",
null,
"https://www.gravatar.com/avatar/f9bbc701ca6770ef482cc1e172344e25",
null,
"https://www.gravatar.com/avatar/398aae016e37efdac2ab5f89d1869cf1",
null,
"https://www.gravatar.com/avatar/f9bbc701ca6770ef482cc1e172344e25",
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.63828766,"math_prob":0.74786335,"size":5785,"snap":"2019-51-2020-05","text_gpt3_token_len":1622,"char_repetition_ratio":0.23490745,"word_repetition_ratio":0.08,"special_character_ratio":0.35073465,"punctuation_ratio":0.15082267,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.96596557,"pos_list":[0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16],"im_url_duplicate_count":[null,1,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2020-01-27T04:14:36Z\",\"WARC-Record-ID\":\"<urn:uuid:5a613039-68b8-4f6b-a297-703f0eb1c69a>\",\"Content-Length\":\"28607\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:f7f60eab-85c8-4811-9fee-3ca90416c2f0>\",\"WARC-Concurrent-To\":\"<urn:uuid:bab43761-50e3-4ad0-b1a8-01314dac7f77>\",\"WARC-IP-Address\":\"184.175.83.43\",\"WARC-Target-URI\":\"https://www.bennadel.com/blog/3292-using-percent-for-in-line-styles-in-angular-4-2-3.htm\",\"WARC-Payload-Digest\":\"sha1:OLZRPB7KS7JUORAJW2PDESWLUB65F36Q\",\"WARC-Block-Digest\":\"sha1:7BPQQZWEZLOWDYWUIWUSPBRZHYFW7KG2\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2020/CC-MAIN-2020-05/CC-MAIN-2020-05_segments_1579251694176.67_warc_CC-MAIN-20200127020458-20200127050458-00308.warc.gz\"}"} |
https://physics.stackexchange.com/questions/62929/time-dependent-hydrohow-would-i-go-about-writing-the-time-dependent-wave-functio | [
"Time Dependent HydroHow would I go about writing the time dependent wave function given the wavefunction at $t=0$? gen Wave Function\n\n1) How vwoulHow would I go about writing the time dependent wave function given the wavefunction at $t=0$? go about writing the time dependent wave function given the wavefunction at $t=0$?\n\nSuppose How would I go about writing the time dependent wave function given the wavefunction at $t=0$? an electron is in a superposition state in the hydrogen atom at $t=0$ with normalized wavefunction: How would How would I go about writing the time dependent wave function given the wavefunction at $t=0$? I go about writing the time dependent wave function given the wavefunction at $t=0$?\n\n$$\\psi(r,\\theta,\\phi) ~=~ A(2R_{10}Y_{00}+4R_{21}Y_{1,-1}).$$\n\n2) What woHow would I go about writing the time dependent wave function given the wavefunction at $t=0$? uld the tiHow wouHow would I go about writing the time dependent wave function given the wavefunction at $t=0$? ld I go about writing the time dependent wave function given the wavefunction at $t=0$? me dependent wave function look like?\n\n3) Also how couHow would I go about writing the time dependent wave function given the wavefunction at $t=0$? ld I tell if the probabilities of measuring a certain energy, or angular momentum arHow would I go about writing the time dependent wave function given the wavefunction at $t=0$? e time dependent?\n\n1) In general, $\\psi(\\vec{r},t) = {\\sf U}(t,0) \\psi(\\vec{r},0)$, where ${\\sf U}(t,0)$ is the time-evolution operator (a unitary matrix).\n2) Given your superposition state at initial time, after time $t$ the wave function would look like\n$$\\psi(r,\\theta,\\phi,t) = A \\left( 2R_{10}Y_{00} e^{-iE_1 t/\\hbar} + 4 R_{21}Y_{1,-1} e^{-iE_2 t/\\hbar} \\right)$$ where $E_1$ and $E_2$ are the ground and first excited energy eigenvalues of the Hydrogen atom (in atomic units, $E_1 = -1/2$ and $E_2 = -1/8$). By the way, your wave function is equivalent if you divide it by $2$ (you include $2$ in the normalization factor $A$).\n3) The probability of measuring $E_1$ and $E_2$ would remain constant: $P_1 = |\\langle R_{10} Y_{00} | \\psi(r,\\theta,\\phi,t) \\rangle |^2 = 4A^2 = 1/5$; $P_2 = 1 - P_1 = 4/5$.\nYou should by now understand that those are the same (constant) probabilities of measuring $L^2 = 0$ and $L^2 = 2\\hbar^2$."
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.8589181,"math_prob":0.9998975,"size":1294,"snap":"2019-43-2019-47","text_gpt3_token_len":325,"char_repetition_ratio":0.2372093,"word_repetition_ratio":0.5463415,"special_character_ratio":0.24265842,"punctuation_ratio":0.072289154,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":1.000002,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2019-10-20T09:26:17Z\",\"WARC-Record-ID\":\"<urn:uuid:12c98471-8f38-48f7-aa6f-f9f8697cc557>\",\"Content-Length\":\"139217\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:089b0366-e0bd-4ba8-b019-cfe056669ede>\",\"WARC-Concurrent-To\":\"<urn:uuid:8f4a1a24-8015-42f4-bb02-1637020d3a4b>\",\"WARC-IP-Address\":\"151.101.129.69\",\"WARC-Target-URI\":\"https://physics.stackexchange.com/questions/62929/time-dependent-hydrohow-would-i-go-about-writing-the-time-dependent-wave-functio\",\"WARC-Payload-Digest\":\"sha1:POOCKM5W4HBFGUSFKDEU53PEOFVDW2WU\",\"WARC-Block-Digest\":\"sha1:RRXMT6BNDN7U2XZWSPGQ4KLQSRVMF2MO\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2019/CC-MAIN-2019-43/CC-MAIN-2019-43_segments_1570986705411.60_warc_CC-MAIN-20191020081806-20191020105306-00062.warc.gz\"}"} |
https://dlmf.nist.gov/search/search?q=integral%20identity | [
"# integral identity\n\n(0.004 seconds)\n\n## 1—10 of 55 matching pages\n\n##### 1: 36.9 Integral Identities\n###### §36.9 IntegralIdentities\n36.9.9 $\\left|\\Psi^{(\\mathrm{E})}\\left(x,y,z\\right)\\right|^{2}=\\frac{8\\pi^{2}}{3^{2/3}% }\\int_{0}^{\\infty}\\int_{0}^{2\\pi}\\Re\\left(\\operatorname{Ai}\\left(\\frac{1}{3^{1% /3}}\\left(x+iy+2zu\\exp\\left(i\\theta\\right)+3u^{2}\\exp\\left(-2i\\theta\\right)% \\right)\\right)\\*\\operatorname{Bi}\\left(\\frac{1}{3^{1/3}}\\left(x-iy+2zu\\exp% \\left(-i\\theta\\right)+3u^{2}\\exp\\left(2i\\theta\\right)\\right)\\right)\\right)u\\,% \\mathrm{d}u\\,\\mathrm{d}\\theta.$\n##### 2: Bibliography O\n• I. Olkin (1959) A class of integral identities with matrix argument. Duke Math. J. 26 (2), pp. 207–213.\n• ##### 3: Bibliography W\n• H. S. Wilf and D. Zeilberger (1992a) An algorithmic proof theory for hypergeometric (ordinary and “$q$”) multisum/integral identities. Invent. Math. 108, pp. 575–633.\n• H. S. Wilf and D. Zeilberger (1992b) Rational function certification of multisum/integral/“$q$identities. Bull. Amer. Math. Soc. (N.S.) 27 (1), pp. 148–153.\n• ##### 4: 19.1 Special Notation\n$R_{F}\\left(x,y,z\\right)$, $R_{G}\\left(x,y,z\\right)$, and $R_{J}\\left(x,y,z,p\\right)$ are the symmetric (in $x$, $y$, and $z$) integrals of the first, second, and third kinds; they are complete if exactly one of $x$, $y$, and $z$ is identically 0. …\n##### 5: 1.4 Calculus of One Variable\n1.4.32 $\\|f\\|^{2}_{2}\\equiv\\int^{b}_{a}|f(x)|^{2}\\,\\mathrm{d}x<\\infty.$\n##### 6: 24.7 Integral Representations\n###### §24.7(i) Bernoulli and Euler Numbers\nThe identities in this subsection hold for $n=1,2,\\dotsc$. …\n##### 7: 35.10 Methods of Computation\nOther methods include numerical quadrature applied to double and multiple integral representations. See Yan (1992) for the ${{}_{1}F_{1}}$ and ${{}_{2}F_{1}}$ functions of matrix argument in the case $m=2$, and Bingham et al. (1992) for Monte Carlo simulation on $\\mathbf{O}(m)$ applied to a generalization of the integral (35.5.8). Koev and Edelman (2006) utilizes combinatorial identities for the zonal polynomials to develop computational algorithms for approximating the series expansion (35.8.1). …\n##### 8: 36.10 Differential Equations\n###### §36.10 Differential Equations\n$K=1$, fold: (36.10.6) is an identity. $K=2$, cusp: … $K=3$, swallowtail: … In terms of the normal forms (36.2.2) and (36.2.3), the $\\Psi^{(\\mathrm{U})}\\left(\\mathbf{x}\\right)$ satisfy the following operator equations …\n##### 9: 25.12 Polylogarithms\n25.12.11 $\\operatorname{Li}_{s}\\left(z\\right)\\equiv\\frac{z}{\\Gamma\\left(s\\right)}\\int_{0% }^{\\infty}\\frac{x^{s-1}}{e^{x}-z}\\,\\mathrm{d}x,$\n##### 10: 35.3 Multivariate Gamma and Beta Functions\n35.3.3 $\\mathrm{B}_{m}\\left(a,b\\right)=\\int\\limits_{\\boldsymbol{{0}}<\\mathbf{X}<% \\mathbf{I}}\\left|\\mathbf{X}\\right|^{a-\\frac{1}{2}(m+1)}\\left|\\mathbf{I}-% \\mathbf{X}\\right|^{b-\\frac{1}{2}(m+1)}\\,\\mathrm{d}{\\mathbf{X}},$ $\\Re\\left(a\\right),\\Re\\left(b\\right)>\\frac{1}{2}(m-1)$.\n35.3.8 $\\mathrm{B}_{m}\\left(a,b\\right)=\\int_{\\boldsymbol{\\Omega}}\\left|\\mathbf{X}% \\right|^{a-\\frac{1}{2}(m+1)}\\left|\\mathbf{I}+\\mathbf{X}\\right|^{-(a+b)}\\,% \\mathrm{d}{\\mathbf{X}},$ $\\Re\\left(a\\right),\\Re\\left(b\\right)>\\frac{1}{2}(m-1)$."
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.6366841,"math_prob":0.9999529,"size":1672,"snap":"2023-14-2023-23","text_gpt3_token_len":504,"char_repetition_ratio":0.132494,"word_repetition_ratio":0.0,"special_character_ratio":0.3307416,"punctuation_ratio":0.2347826,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9999143,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2023-05-31T10:36:09Z\",\"WARC-Record-ID\":\"<urn:uuid:3c8ffadb-6977-45ab-a49f-7e5a0773b38f>\",\"Content-Length\":\"71949\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:c9a48532-0ec7-4240-a7fd-9d08a4532609>\",\"WARC-Concurrent-To\":\"<urn:uuid:6399ec4c-ddd2-4193-8ac6-05a88ce21a81>\",\"WARC-IP-Address\":\"129.6.13.19\",\"WARC-Target-URI\":\"https://dlmf.nist.gov/search/search?q=integral%20identity\",\"WARC-Payload-Digest\":\"sha1:P4KPZZRZK663ONW4GOV6APN6DIYAH2NN\",\"WARC-Block-Digest\":\"sha1:QCAWUZMY6WIBN632LY53LEEKK5KKH7SD\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2023/CC-MAIN-2023-23/CC-MAIN-2023-23_segments_1685224646457.49_warc_CC-MAIN-20230531090221-20230531120221-00355.warc.gz\"}"} |
https://www.colorhexa.com/02183b | [
"# #02183b Color Information\n\nIn a RGB color space, hex #02183b is composed of 0.8% red, 9.4% green and 23.1% blue. Whereas in a CMYK color space, it is composed of 96.6% cyan, 59.3% magenta, 0% yellow and 76.9% black. It has a hue angle of 216.8 degrees, a saturation of 93.4% and a lightness of 12%. #02183b color hex could be obtained by blending #043076 with #000000. Closest websafe color is: #000033.\n\n• R 1\n• G 9\n• B 23\nRGB color chart\n• C 97\n• M 59\n• Y 0\n• K 77\nCMYK color chart\n\n#02183b color description : Very dark blue.\n\n# #02183b Color Conversion\n\nThe hexadecimal color #02183b has RGB values of R:2, G:24, B:59 and CMYK values of C:0.97, M:0.59, Y:0, K:0.77. Its decimal value is 137275.\n\nHex triplet RGB Decimal 02183b `#02183b` 2, 24, 59 `rgb(2,24,59)` 0.8, 9.4, 23.1 `rgb(0.8%,9.4%,23.1%)` 97, 59, 0, 77 216.8°, 93.4, 12 `hsl(216.8,93.4%,12%)` 216.8°, 96.6, 23.1 000033 `#000033`\nCIE-LAB 8.839, 7.417, -25.106 1.141, 0.982, 4.267 0.179, 0.154, 0.982 8.839, 26.179, 286.459 8.839, -4.442, -18.398 9.909, 3.212, -18.595 00000010, 00011000, 00111011\n\n# Color Schemes with #02183b\n\n• #02183b\n``#02183b` `rgb(2,24,59)``\n• #3b2502\n``#3b2502` `rgb(59,37,2)``\nComplementary Color\n• #02353b\n``#02353b` `rgb(2,53,59)``\n• #02183b\n``#02183b` `rgb(2,24,59)``\n• #08023b\n``#08023b` `rgb(8,2,59)``\nAnalogous Color\n• #353b02\n``#353b02` `rgb(53,59,2)``\n• #02183b\n``#02183b` `rgb(2,24,59)``\n• #3b0802\n``#3b0802` `rgb(59,8,2)``\nSplit Complementary Color\n• #183b02\n``#183b02` `rgb(24,59,2)``\n• #02183b\n``#02183b` `rgb(2,24,59)``\n• #3b0218\n``#3b0218` `rgb(59,2,24)``\n• #023b25\n``#023b25` `rgb(2,59,37)``\n• #02183b\n``#02183b` `rgb(2,24,59)``\n• #3b0218\n``#3b0218` `rgb(59,2,24)``\n• #3b2502\n``#3b2502` `rgb(59,37,2)``\n• #000000\n``#000000` `rgb(0,0,0)``\n• #00040a\n``#00040a` `rgb(0,4,10)``\n• #010e22\n``#010e22` `rgb(1,14,34)``\n• #02183b\n``#02183b` `rgb(2,24,59)``\n• #032254\n``#032254` `rgb(3,34,84)``\n• #042c6c\n``#042c6c` `rgb(4,44,108)``\n• #053685\n``#053685` `rgb(5,54,133)``\nMonochromatic Color\n\n# Alternatives to #02183b\n\nBelow, you can see some colors close to #02183b. Having a set of related colors can be useful if you need an inspirational alternative to your original color choice.\n\n• #02263b\n``#02263b` `rgb(2,38,59)``\n• #02223b\n``#02223b` `rgb(2,34,59)``\n• #021d3b\n``#021d3b` `rgb(2,29,59)``\n• #02183b\n``#02183b` `rgb(2,24,59)``\n• #02133b\n``#02133b` `rgb(2,19,59)``\n• #020f3b\n``#020f3b` `rgb(2,15,59)``\n• #020a3b\n``#020a3b` `rgb(2,10,59)``\nSimilar Colors\n\n# #02183b Preview\n\nText with hexadecimal color #02183b\n\nThis text has a font color of #02183b.\n\n``<span style=\"color:#02183b;\">Text here</span>``\n#02183b background color\n\nThis paragraph has a background color of #02183b.\n\n``<p style=\"background-color:#02183b;\">Content here</p>``\n#02183b border color\n\nThis element has a border color of #02183b.\n\n``<div style=\"border:1px solid #02183b;\">Content here</div>``\nCSS codes\n``.text {color:#02183b;}``\n``.background {background-color:#02183b;}``\n``.border {border:1px solid #02183b;}``\n\n# Shades and Tints of #02183b\n\nA shade is achieved by adding black to any pure hue, while a tint is created by mixing white to any pure color. In this example, #000102 is the darkest color, while #eef4fe is the lightest one.\n\n• #000102\n``#000102` `rgb(0,1,2)``\n• #010915\n``#010915` `rgb(1,9,21)``\n• #011028\n``#011028` `rgb(1,16,40)``\n• #02183b\n``#02183b` `rgb(2,24,59)``\n• #03204e\n``#03204e` `rgb(3,32,78)``\n• #032761\n``#032761` `rgb(3,39,97)``\n• #042f74\n``#042f74` `rgb(4,47,116)``\n• #053787\n``#053787` `rgb(5,55,135)``\n• #053f9a\n``#053f9a` `rgb(5,63,154)``\n``#0646ad` `rgb(6,70,173)``\n• #074ec0\n``#074ec0` `rgb(7,78,192)``\n• #0756d3\n``#0756d3` `rgb(7,86,211)``\n• #085de6\n``#085de6` `rgb(8,93,230)``\n• #0a66f7\n``#0a66f7` `rgb(10,102,247)``\n• #1d72f7\n``#1d72f7` `rgb(29,114,247)``\n• #307df8\n``#307df8` `rgb(48,125,248)``\n• #4389f9\n``#4389f9` `rgb(67,137,249)``\n• #5695f9\n``#5695f9` `rgb(86,149,249)``\n• #69a1fa\n``#69a1fa` `rgb(105,161,250)``\n``#7cadfb` `rgb(124,173,251)``\n• #8fb9fb\n``#8fb9fb` `rgb(143,185,251)``\n• #a2c5fc\n``#a2c5fc` `rgb(162,197,252)``\n• #b5d1fc\n``#b5d1fc` `rgb(181,209,252)``\n• #c8ddfd\n``#c8ddfd` `rgb(200,221,253)``\n• #dbe9fe\n``#dbe9fe` `rgb(219,233,254)``\n• #eef4fe\n``#eef4fe` `rgb(238,244,254)``\nTint Color Variation\n\n# Tones of #02183b\n\nA tone is produced by adding gray to any pure hue. In this case, #1e1e1f is the less saturated color, while #02183b is the most saturated one.\n\n• #1e1e1f\n``#1e1e1f` `rgb(30,30,31)``\n• #1c1e21\n``#1c1e21` `rgb(28,30,33)``\n• #191d24\n``#191d24` `rgb(25,29,36)``\n• #171d26\n``#171d26` `rgb(23,29,38)``\n• #151c28\n``#151c28` `rgb(21,28,40)``\n• #121c2b\n``#121c2b` `rgb(18,28,43)``\n• #101b2d\n``#101b2d` `rgb(16,27,45)``\n• #0e1b2f\n``#0e1b2f` `rgb(14,27,47)``\n• #0b1a32\n``#0b1a32` `rgb(11,26,50)``\n• #091a34\n``#091a34` `rgb(9,26,52)``\n• #071936\n``#071936` `rgb(7,25,54)``\n• #041939\n``#041939` `rgb(4,25,57)``\n• #02183b\n``#02183b` `rgb(2,24,59)``\nTone Color Variation\n\n# Color Blindness Simulator\n\nBelow, you can see how #02183b is perceived by people affected by a color vision deficiency. This can be useful if you need to ensure your color combinations are accessible to color-blind users.\n\nMonochromacy\n• Achromatopsia 0.005% of the population\n• Atypical Achromatopsia 0.001% of the population\nDichromacy\n• Protanopia 1% of men\n• Deuteranopia 1% of men\n• Tritanopia 0.001% of the population\nTrichromacy\n• Protanomaly 1% of men, 0.01% of women\n• Deuteranomaly 6% of men, 0.4% of women\n• Tritanomaly 0.01% of the population"
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.54492664,"math_prob":0.73226076,"size":3635,"snap":"2019-35-2019-39","text_gpt3_token_len":1626,"char_repetition_ratio":0.12751308,"word_repetition_ratio":0.011090573,"special_character_ratio":0.5645117,"punctuation_ratio":0.23608018,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9937092,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2019-09-21T00:25:03Z\",\"WARC-Record-ID\":\"<urn:uuid:d7c5a173-ab28-41e7-a51d-1b888df79293>\",\"Content-Length\":\"36149\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:2f33ff8d-6c5b-49a3-a756-0b9451e71366>\",\"WARC-Concurrent-To\":\"<urn:uuid:77d9bcbe-a884-43de-a0c3-3f941c7f07bd>\",\"WARC-IP-Address\":\"178.32.117.56\",\"WARC-Target-URI\":\"https://www.colorhexa.com/02183b\",\"WARC-Payload-Digest\":\"sha1:MVIN2YSEOKMWYW7O2G2UYZ7QVCFHKXOR\",\"WARC-Block-Digest\":\"sha1:B6IGSPJ7MUNVSGHWIDGBZIZPIOHAJ5OB\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2019/CC-MAIN-2019-39/CC-MAIN-2019-39_segments_1568514574159.19_warc_CC-MAIN-20190921001810-20190921023810-00146.warc.gz\"}"} |
https://amsi.org.au/ESA_Senior_Years/SeniorTopic3/3h/3h_2content_3.html | [
"## Content\n\n### Derivatives of general exponential functions\n\nSince we can now differentiate $$e^x$$, using our knowledge of differentiation we can also differentiate other functions.\n\nIn particular, we can now differentiate functions of the form $$f(x) = e^{kx}$$, where $$k$$ is a real constant. From the chain rule, we obtain\n\n$f'(x) = k \\, e^{kx}.$\n\nWe saw in the previous section, when differentiating $$2^x$$, that it can be written as $$e^{\\log_e 2 \\cdot x}$$, which is of the form $$e^{kx}$$. The same technique can be used to differentiate any function $$a^x$$, where $$a$$ is a positive real number. A function $$a^x$$ is just a function of the form $$e^{kx}$$ in disguise.\n\nWriting $$a$$ as $$e^{\\log_e a}$$, we can rewrite $$f(x) = a^x$$, using the index laws, as\n\n$f(x) = a^x = \\bigl( e^{\\log_e a} \\bigr)^x = e^{x \\, \\log_e a}.$\n\nThe function is then in the form $$e^{kx}$$ (with $$k=\\log_e a$$) and differentiating gives\n\n$f'(x) = \\log_e a \\cdot a^x.$\n\nSo the derivative of $$a^x$$ is a constant times itself, and that constant is $$\\log_e a$$.\n\nExercise 8\n\nUse what we've done so far to explain why, for any $$a>0$$,\n\n$\\lim_{h \\to 0} \\dfrac{a^h - 1}{h} = \\log_e a.$\n\nExercise 9\n\nLet $$f(x) = x^x$$, for $$x>0$$. Differentiate $$f(x)$$ and find its stationary points.\n\nNext page - Content - Derivatives of general logarithmic functions"
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.79822016,"math_prob":1.0000087,"size":1338,"snap":"2020-10-2020-16","text_gpt3_token_len":432,"char_repetition_ratio":0.15742129,"word_repetition_ratio":0.0,"special_character_ratio":0.3497758,"punctuation_ratio":0.107407406,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":1.0000099,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2020-04-02T20:29:41Z\",\"WARC-Record-ID\":\"<urn:uuid:ce4ec9e4-4825-479a-a9ec-2145beac4579>\",\"Content-Length\":\"3932\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:2c74b089-a5cb-4ffb-a259-22cb360eef98>\",\"WARC-Concurrent-To\":\"<urn:uuid:5520311c-fc1c-4298-8e2c-5531ec5e94c9>\",\"WARC-IP-Address\":\"101.0.91.74\",\"WARC-Target-URI\":\"https://amsi.org.au/ESA_Senior_Years/SeniorTopic3/3h/3h_2content_3.html\",\"WARC-Payload-Digest\":\"sha1:HJD2H3DYNJ5N6FHFCNRB6722T6DH7TL7\",\"WARC-Block-Digest\":\"sha1:W66LFO2I2475WZCR5UPBNWQWBVR5NT2M\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2020/CC-MAIN-2020-16/CC-MAIN-2020-16_segments_1585370507738.45_warc_CC-MAIN-20200402173940-20200402203940-00362.warc.gz\"}"} |
https://stacks.math.columbia.edu/tag/0F0Z | [
"Definition 59.96.1. Let $f : X \\to Y$ be a quasi-compact and quasi-separated morphism of schemes. The cohomological dimension of $f$ is the smallest element\n\n$\\text{cd}(f) \\in \\{ 0, 1, 2, \\ldots \\} \\cup \\{ \\infty \\}$\n\nsuch that for any abelian torsion sheaf $\\mathcal{F}$ on $X_{\\acute{e}tale}$ we have $R^ if_*\\mathcal{F} = 0$ for $i > \\text{cd}(f)$.\n\nIn your comment you can use Markdown and LaTeX style mathematics (enclose it like $\\pi$). A preview option is available if you wish to see how it works out (just click on the eye in the toolbar)."
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.565484,"math_prob":0.9986951,"size":366,"snap":"2022-27-2022-33","text_gpt3_token_len":142,"char_repetition_ratio":0.09944751,"word_repetition_ratio":0.0,"special_character_ratio":0.37978142,"punctuation_ratio":0.12,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.99774444,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2022-06-26T10:50:33Z\",\"WARC-Record-ID\":\"<urn:uuid:abdae747-4e58-478e-af3d-106ac518413c>\",\"Content-Length\":\"13735\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:8c086036-c065-4cb9-96d5-c2878bebd570>\",\"WARC-Concurrent-To\":\"<urn:uuid:c8cd752a-042a-4bf7-a58a-9ede85435450>\",\"WARC-IP-Address\":\"128.59.222.85\",\"WARC-Target-URI\":\"https://stacks.math.columbia.edu/tag/0F0Z\",\"WARC-Payload-Digest\":\"sha1:IDVWJQQ3YIBIJBSX6V7NAJSSRE6O7QJ2\",\"WARC-Block-Digest\":\"sha1:I52Q2UQLUAAR4GJIRGWIVDEPKCEH5IMP\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2022/CC-MAIN-2022-27/CC-MAIN-2022-27_segments_1656103205617.12_warc_CC-MAIN-20220626101442-20220626131442-00071.warc.gz\"}"} |
https://www.impan.pl/en/publishing-house/journals-and-series/studia-mathematica/all/255/2/113292/a-sharp-form-of-the-marcinkiewicz-interpolation-theorem-for-orlicz-spaces | [
"# Publishing house / Journals and Serials / Studia Mathematica / All issues\n\n## Studia Mathematica\n\nPDF files of articles are only available for institutions which have paid for the online version upon signing an Institutional User License.\n\n## A sharp form of the Marcinkiewicz interpolation theorem for Orlicz spaces\n\n### Volume 255 / 2020\n\nStudia Mathematica 255 (2020), 109-158 MSC: Primary 46E30; Secondary 46M35. DOI: 10.4064/sm180111-28-10 Published online: 13 May 2020\n\n#### Abstract\n\nLet $(X,\\mu )$ and $(Y,\\nu )$ be $\\sigma$-finite measure spaces with $\\mu (X)=\\nu (Y)=\\infty$ and $(Y,\\nu )$ nonatomic and separable. Suppose $T$ is a so-called $r$-quasilinear operator mapping the simple functions on $X$ into the measurable functions on $Y$ that satisfies the weak type conditions $$\\lambda \\nu ( \\lbrace y \\in Y : |(Tf)(y)| \\gt \\lambda \\rbrace )^{{1}/{p_{i}}} \\leq C_{p_{i},q_{i}} \\Big ( \\int _{\\mathbb {R_+}} \\mu ( \\lbrace x \\in X : |f(x)| \\gt t \\rbrace )^{{q_{i}}/{p_{i}}} t^{q_{i}-1}\\,dt \\Big )^{{1}/{q_{i}}},\\quad i=0,1,$$ where $1 \\lt p_0 \\lt p_1 \\lt \\infty$, $1 \\leq q_0, q_1 \\lt \\infty$ and $C_{p_{i},q_{i}}=C_{p_{i},q_{i}}(T) \\gt 0$ is independent of simple $f$ on $X$ and $\\lambda \\gt 0$.\n\nWe give necessary and sufficient conditions on Young functions $\\Phi _1$ and $\\Phi _2$ in order that any operator $T$ as described above is bounded between the corresponding Orlicz spaces.\n\n#### Authors\n\n• Ron KermanDepartment of Mathematics\nBrock University\nSt. Catharines, Ontario, L2S 3A1, Canada\ne-mail\n• Rama RawatDepartment of Mathematics and Statistics\nIndian Institute of Technology\nKanpur 208016, India\ne-mail\n• Rajesh K. SinghDepartment of Mathematics and Statistics\nIndian Institute of Technology\nKanpur 208016, India\ne-mail\n\n## Search for IMPAN publications\n\nQuery phrase too short. Type at least 4 characters.\n\n## Rewrite code from the image",
null,
""
] | [
null,
"https://www.impan.pl/en/publishing-house/journals-and-series/studia-mathematica/all/255/2/113292/a-sharp-form-of-the-marcinkiewicz-interpolation-theorem-for-orlicz-spaces",
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.6728344,"math_prob":0.989661,"size":1012,"snap":"2021-43-2021-49","text_gpt3_token_len":368,"char_repetition_ratio":0.11210317,"word_repetition_ratio":0.0,"special_character_ratio":0.3922925,"punctuation_ratio":0.08374384,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9982719,"pos_list":[0,1,2],"im_url_duplicate_count":[null,1,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2021-12-01T13:12:42Z\",\"WARC-Record-ID\":\"<urn:uuid:2379c5a1-0cb2-4fa1-8ccf-9768e2aec76a>\",\"Content-Length\":\"47450\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:3261c137-5a0b-4243-b609-d1e961d9a931>\",\"WARC-Concurrent-To\":\"<urn:uuid:b8ad19aa-fb0b-450d-b247-1504554158c5>\",\"WARC-IP-Address\":\"195.187.71.110\",\"WARC-Target-URI\":\"https://www.impan.pl/en/publishing-house/journals-and-series/studia-mathematica/all/255/2/113292/a-sharp-form-of-the-marcinkiewicz-interpolation-theorem-for-orlicz-spaces\",\"WARC-Payload-Digest\":\"sha1:7ZYVJPCHNHKAGD4OYK3EJUGR3PTDZEZW\",\"WARC-Block-Digest\":\"sha1:SL2MUXSWRKFIVD7NLFBIYIS2CFES35J2\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2021/CC-MAIN-2021-49/CC-MAIN-2021-49_segments_1637964360803.0_warc_CC-MAIN-20211201113241-20211201143241-00060.warc.gz\"}"} |
https://www.barcodefaq.com/knowledge-base/java-byte-array/ | [
"# Pass a Byte Array into Java Components\n\nYou are here:\n• Pass a Byte Array into Java Components\n\nThe following error may occur when passing a byte array directly into the DataToEncode method that expects a string value when using the Java Barcode Components:\njava.lang.ArrayIndexOutOfBoundsException\n\n### Solution(s):\n\nThe solutions differ depending on the symbology:\n\n• PDF417: This is only possible with IDAutomation PDF417 Java Products V 4.10 dated October, 2004 or later. When using PDF417, pass the byte array to the binaryCode field of the class library. Make sure to set the processTilde to false and set PDFMode to 0.\nFor example:\nPDF417 bc=new PDF417();\nbc.processTilde=false;\nbc.PDFMode=0;\nbc.binaryCode=myByteArray;\n• Data Matrix: When using Data Matrix barcodes, use the code example below to convert the byte array (encodedBytes) into a string that can be encoded in the code field. Make sure to set the encoding to E_BASE256 and processTilde to false.\nDataMatrix bc = new DataMatrix();\nbc.encoding = DataMatrix.E_BASE256;\nbc.processTilde=false;\nbc.code=””;\nString binaryString;\nfor (int i=0; i < encodedBytes.length; i++)\n{\nbinaryString = Integer.toBinaryString((int)encodedBytes[i]);\nif (binaryString.length() > 8)\nbinaryString = binaryString.substring(binaryString.length()-8,binaryString.length());\nbc.code = bc.code + (char) Integer.parseInt(binaryString,2);\n}"
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.530933,"math_prob":0.6060683,"size":1406,"snap":"2020-34-2020-40","text_gpt3_token_len":327,"char_repetition_ratio":0.13623396,"word_repetition_ratio":0.06417112,"special_character_ratio":0.23541963,"punctuation_ratio":0.1870229,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.97964823,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2020-09-27T17:59:43Z\",\"WARC-Record-ID\":\"<urn:uuid:818d85e5-346e-40b1-a57f-b308cc566b3e>\",\"Content-Length\":\"75169\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:99fe7f8d-70be-4a82-b316-a8d1ade1af5c>\",\"WARC-Concurrent-To\":\"<urn:uuid:97697a69-b332-47f2-ba84-7558ce1476b2>\",\"WARC-IP-Address\":\"35.209.27.178\",\"WARC-Target-URI\":\"https://www.barcodefaq.com/knowledge-base/java-byte-array/\",\"WARC-Payload-Digest\":\"sha1:H45574HC3ILHIIKCYJALA3NLPQTZ2AKT\",\"WARC-Block-Digest\":\"sha1:GJEJ5BZAVA44I5TAT2MPJI4SFBLUYDAP\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2020/CC-MAIN-2020-40/CC-MAIN-2020-40_segments_1600400283990.75_warc_CC-MAIN-20200927152349-20200927182349-00704.warc.gz\"}"} |
https://hiddenherstories.org/random-sampling-worksheet/ | [
"# Random Sampling Worksheet\n\n## List of Random Sampling Worksheet\n\n### 1. Worksheet Random Sampling",
null,
"### 2. Statistics Vocabulary Matching Activity Worksheet Assessment Random Sampling",
null,
"### 3. Stratified Sampling Definition Formula Calculation Random Worksheet",
null,
"### 4. Solved Purpose Assignment Random Sampling Worksheet",
null,
"### 5. Simulation Real Statistics Excel Random Sampling Worksheet",
null,
"### 6. Simple Random Sample Excel Sampling Worksheet",
null,
"### 7. Sampling Worksheet Printable Worksheets Activities Teachers Parents Tutors Families Random",
null,
"### 8. Sampling Techniques Geography Video Lesson Transcript Random Worksheet",
null,
"### 9. Topic Investigating Ecosystems World Science Green Random Sampling Worksheet",
null,
"### 10. Sampling Summarizing Big Data Solver Random Worksheet",
null,
"### 11. Unit 4 Tests Significance Random Sampling Worksheet",
null,
"### 12. Applet Demonstrate Sampling Distribution Random Worksheet",
null,
"### 13. Random Sampling Biology Junction Worksheet",
null,
"### 14. Week 3 Practice Problem Worksheet Random Sampling",
null,
"### 15. Procedures Real Statistics Excel Random Sampling Worksheet",
null,
"### 16. Population Density Random Sampling Mark Recapture Populations Worksheets Worksheet",
null,
"### 17. Multiplication Facts Worksheets Picture Ideas Vertical Free Sample Worksheet Random Sampling",
null,
"### 18. Methods Sampling Stem Random Worksheet",
null,
"### 19. Matching Random Sampling Worksheet",
null,
"### 20. Lesson Types Sampling Random Worksheet",
null,
"### 21. Intro Statistics Excel Random Sampling Worksheet",
null,
"### 22. Grade Skills Math Helping Random Sampling Worksheet",
null,
"### 23. Worksheet Classroom Worksheets Kindergarten Kids Printouts Random Sampling Preschoolers Fantastic Image Inspirations Free Math Printable",
null,
"### 24. Grade 4 Resources Printable Worksheets Topic Random Topics Essays Descriptive Story Writing Lets Share Knowledge Sampling Worksheet",
null,
"### 25. Grade 3 Vocabulary Worksheets Week Lets Share Knowledge Random Sampling Worksheet",
null,
"### 26. Free Letter Worksheets Den Random Sampling Worksheet",
null,
"### 27. Fraction Decimal Task Cards Worksheets Bundle Random Sampling Worksheet",
null,
"### 28. Worksheet Generator Random Sampling",
null,
"### 29. Big Bang Law Worksheet Grade Lesson Planet Random Sampling",
null,
"### 30. Auditory Perception Worksheets Preschool Number 1 Math Fraction Practice Kindergarten Workbook Middle Grades Search Shade Random Multiplication Generator Sampling Worksheet",
null,
"### 31. Stat Random Sampling Worksheet",
null,
"### 32. Systematic Random Sampling Worksheet",
null,
"### 33. 1 Chapter 7 Sampling Distributions Simple Random Point Estimation Introduction Distribution Download Worksheet",
null,
"### 34. Solved Worksheet Identify Obs Random Sampling",
null,
"### 35. Solved Worksheet 2 Sampling Techniques Random",
null,
"### 36. Sampling Surveys Random Worksheet",
null,
"### 37. Samples Surveys Worksheets Maths Random Sampling Worksheet",
null,
"### 38. Grade 7 Common Core Math Worksheets Random Sampling Worksheet",
null,
"### 39. Ecology Measuring Abundance Random Sampling Footpath Stem Worksheet",
null,
"### 40. Random Math Problem Generator Minute Addition Worksheets Grade Long Division Sentence Patterns Solving Basic Test Funny Sampling Worksheet",
null,
"### 41. Sample High School Grammar Exam Worksheets Double Digit Addition Problems Unit Rate Math Free Color Numbers Kids Crafts Preschoolers Random Sampling Worksheet",
null,
""
] | [
null,
"https://hiddenherstories.org/images/worksheet-random-sampling.jpg",
null,
"https://hiddenherstories.org/images/statistics-vocabulary-matching-activity-worksheet-assessment-random-sampling.jpg",
null,
"https://hiddenherstories.org/images/stratified-sampling-definition-formula-calculation-random-worksheet.jpg",
null,
"https://hiddenherstories.org/images/solved-purpose-assignment-random-sampling-worksheet.jpg",
null,
"https://hiddenherstories.org/images/simulation-real-statistics-excel-random-sampling-worksheet.jpg",
null,
"https://hiddenherstories.org/images/simple-random-sample-excel-sampling-worksheet.jpg",
null,
"https://hiddenherstories.org/images/sampling-worksheet-printable-worksheets-activities-teachers-parents-tutors-families-random.jpg",
null,
"https://hiddenherstories.org/images/sampling-techniques-geography-video-lesson-transcript-random-worksheet.jpg",
null,
"https://hiddenherstories.org/images/topic-investigating-ecosystems-world-science-green-random-sampling-worksheet.jpg",
null,
"https://hiddenherstories.org/images/sampling-summarizing-big-data-solver-random-worksheet.jpg",
null,
"https://hiddenherstories.org/images/unit-4-tests-significance-random-sampling-worksheet.jpg",
null,
"https://hiddenherstories.org/images/applet-demonstrate-sampling-distribution-random-worksheet.jpg",
null,
"https://hiddenherstories.org/images/random-sampling-biology-junction-worksheet.jpg",
null,
"https://hiddenherstories.org/images/week-3-practice-problem-worksheet-random-sampling.jpg",
null,
"https://hiddenherstories.org/images/procedures-real-statistics-excel-random-sampling-worksheet.jpg",
null,
"https://hiddenherstories.org/images/population-density-random-sampling-mark-recapture-populations-worksheets-worksheet.jpg",
null,
"https://hiddenherstories.org/images/multiplication-facts-worksheets-picture-ideas-vertical-free-sample-worksheet-random-sampling.jpg",
null,
"https://hiddenherstories.org/images/methods-sampling-stem-random-worksheet.jpg",
null,
"https://hiddenherstories.org/images/matching-random-sampling-worksheet.jpg",
null,
"https://hiddenherstories.org/images/lesson-types-sampling-random-worksheet.jpg",
null,
"https://hiddenherstories.org/images/intro-statistics-excel-random-sampling-worksheet.jpg",
null,
"https://hiddenherstories.org/images/grade-skills-math-helping-random-sampling-worksheet.jpg",
null,
"https://hiddenherstories.org/images/worksheet-classroom-worksheets-kindergarten-kids-printouts-random-sampling-preschoolers-fantastic-image-inspirations-free-math-printable.jpg",
null,
"https://hiddenherstories.org/images/grade-4-resources-printable-worksheets-topic-random-topics-essays-descriptive-story-writing-lets-share-knowledge-sampling-worksheet.jpg",
null,
"https://hiddenherstories.org/images/grade-3-vocabulary-worksheets-week-lets-share-knowledge-random-sampling-worksheet.jpg",
null,
"https://hiddenherstories.org/images/free-letter-worksheets-den-random-sampling-worksheet.jpg",
null,
"https://hiddenherstories.org/images/fraction-decimal-task-cards-worksheets-bundle-random-sampling-worksheet.jpg",
null,
"https://hiddenherstories.org/images/worksheet-generator-random-sampling.jpg",
null,
"https://hiddenherstories.org/images/big-bang-law-worksheet-grade-lesson-planet-random-sampling.jpg",
null,
"https://hiddenherstories.org/images/auditory-perception-worksheets-preschool-number-1-math-fraction-practice-kindergarten-workbook-middle-grades-search-shade-random-multiplication-generator-sampling-worksheet.jpg",
null,
"https://hiddenherstories.org/images/stat-random-sampling-worksheet.jpg",
null,
"https://hiddenherstories.org/images/systematic-random-sampling-worksheet.jpg",
null,
"https://hiddenherstories.org/images/1-chapter-7-sampling-distributions-simple-random-point-estimation-introduction-distribution-download-worksheet.jpg",
null,
"https://hiddenherstories.org/images/solved-worksheet-identify-obs-random-sampling.jpg",
null,
"https://hiddenherstories.org/images/solved-worksheet-2-sampling-techniques-random.jpg",
null,
"https://hiddenherstories.org/images/sampling-surveys-random-worksheet.jpg",
null,
"https://hiddenherstories.org/images/samples-surveys-worksheets-maths-random-sampling-worksheet.jpg",
null,
"https://hiddenherstories.org/images/grade-7-common-core-math-worksheets-random-sampling-worksheet.jpg",
null,
"https://hiddenherstories.org/images/ecology-measuring-abundance-random-sampling-footpath-stem-worksheet.jpg",
null,
"https://hiddenherstories.org/images/random-math-problem-generator-minute-addition-worksheets-grade-long-division-sentence-patterns-solving-basic-test-funny-sampling-worksheet.jpg",
null,
"https://hiddenherstories.org/images/sample-high-school-grammar-exam-worksheets-double-digit-addition-problems-unit-rate-math-free-color-numbers-kids-crafts-preschoolers-random-sampling-worksheet.jpg",
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.5517205,"math_prob":0.6176497,"size":3290,"snap":"2021-21-2021-25","text_gpt3_token_len":576,"char_repetition_ratio":0.35818624,"word_repetition_ratio":0.011792453,"special_character_ratio":0.16838905,"punctuation_ratio":0.08742005,"nsfw_num_words":1,"has_unicode_error":false,"math_prob_llama3":0.9918483,"pos_list":[0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82],"im_url_duplicate_count":[null,1,null,1,null,1,null,1,null,1,null,1,null,1,null,1,null,1,null,1,null,1,null,1,null,1,null,1,null,1,null,1,null,1,null,1,null,1,null,1,null,1,null,1,null,1,null,1,null,1,null,1,null,1,null,1,null,1,null,1,null,1,null,1,null,1,null,1,null,1,null,1,null,1,null,1,null,1,null,1,null,1,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2021-05-06T21:05:53Z\",\"WARC-Record-ID\":\"<urn:uuid:85d57853-2156-4b38-ba57-5cb11aaf5cd2>\",\"Content-Length\":\"56410\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:eb87c488-ed76-45e1-b2aa-45a8304d81e3>\",\"WARC-Concurrent-To\":\"<urn:uuid:f5aab043-821d-44e4-bc9e-ad55eaa4d538>\",\"WARC-IP-Address\":\"172.67.139.56\",\"WARC-Target-URI\":\"https://hiddenherstories.org/random-sampling-worksheet/\",\"WARC-Payload-Digest\":\"sha1:H6SYFVXBD6U5RXXSBJTYALCHTRK7FLB6\",\"WARC-Block-Digest\":\"sha1:Q2QM3VQSTJYAWZBX5CJW5S2XUPZQCKN2\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2021/CC-MAIN-2021-21/CC-MAIN-2021-21_segments_1620243988763.83_warc_CC-MAIN-20210506205251-20210506235251-00446.warc.gz\"}"} |
https://elearn-rt-en.gunt.de/3-controllers-and-controller-types/3-1-controller-transmission-behaviour | [
"# 3. Controllers and controller types\n\n## 3.1 Controller transmission behaviour",
null,
"Block diagram of a PID controller\n\nJust like the controlled system, the controller shows a specific transmission behaviour. Unlike the controlled system, here the transmission behaviour can be deliberately adjusted according to the desired function.\n\nThe manipulating variable y from the frequently used PID controller can be described as the sum of the output signals from different transmission blocks each with a different time response.\n\nThe same input signal is present at the inputs of all transmission blocks, namely the control difference e.",
null,
"Step responses of the PID controller:\nP component\n\nThe transmission behaviour of the PID controller is defined by the following parameters:\n\n• control gain Kp (proportional behaviour)",
null,
"Step responses of the PID controller:\nI component\n\n• reset time Ti (integral behaviour)",
null,
"Step responses of the PID controller:\nD component\n\n• rate time Td (derivative behaviour)\n\nDepending on the parameter settings, the controller can demonstrate P, PI, PD or PID behaviour.\n\nThe properties of the different controller types are set out below.",
null,
"In a unity feedback configuration, an ideal PID compensator is used to enhance the step response of a system with the transfer function",
null,
"The PID controller has the standard form Kp+Ki/s+Kds. Therefore, the closed loop transfer function of the whole system becomes",
null,
"As the proportional, integral and derivative terms of the PID compensator are increased, the evolution of the step response, from the initial uncompensated response (corresponding to PID coefficents Kp=1, Ki=0, Kd=0) to the final desired response is depicted. The following effects of PID compensation can be readily observed:\n\n• The proportional term increases the speed of the system. It also decreases the residual steady state error of the step response, but can not eliminate it completely.\n\n• The integral term eliminates the residual steady state error of the step response, but adds undesired \"oscillations\" to the transient response (overshoot).\n\n• The derivative term \"damps out\" the undesired oscillations in the transient response."
] | [
null,
"https://lh3.googleusercontent.com/mp_wOHlKXc6w-752_82zGVKzERwdYTNhPEMVYGWMkO0KY3cMTIGqBgfxbbu06vn6lhFrvKuO6erADaYoiHT-u7fI22NnWp1SP1ryU2NsfqpGPqfqYMlf15aCshV51W3dJw=w1280",
null,
"https://lh6.googleusercontent.com/N3VQKp9AJgyGEwq-FJhwxLGWzG7VpAB9vsf5RjGfWOSPQAUmO0VmS_KYW9Ca3p8rQJ52WQDNcMhQxHr7Nnjj1RYnOpYWBLSV0R6GKXadA7Bj3kXK3hy3zgl4Zbx4RYvRmg=w1280",
null,
"https://lh4.googleusercontent.com/ZSHaPICw81c1MMKT06FWSaJg1L-tVFERVEfM2jpg50jSNg_5kazCobhvqbOG9U6twR8aPVpHXUetUh8sTM7vz9jXHsaKRTFRB6r5i32bnmOdeiFAj1mMKLfSXQ3cN2s=w1280",
null,
"https://lh4.googleusercontent.com/Ujd2v6gwgwo4rE93sSk-4u0eId4cEw2ZfiOBMQ5fwI-JIQyvUStZhPGr5g9JTocD0aqR41krtc6o8Ab_5qO91GnTFB_-uI4fyX_dy_n2VbWl0Z3AzE9lFDCqTxvFTBvIxQ=w1280",
null,
"https://lh3.googleusercontent.com/SPicaJs57EcRPpFwLMzJfAVdvQs9VlEaiT2HRfr8nMm9fYMl-86gkoAXwIr0CcTiU2moRo5yWFn1zUID-i8kh4Hv7bV9k2gcM_eIM-9QNZEhAESJI-FRS97VlVw8ZVOp9A=w1280",
null,
"https://lh3.googleusercontent.com/apWK69y91Kf6YNSCQZU7HW4WtFq6rnde2og_ki8Xy9GcVune_ZycmmmpQ769sG6ezjjpJZcOUIFKZiqA4qa2L-LmY7K9hnmbybNd5jQO1uxNDN9GG5uAxCQ7d9-IRU5LSg=w1280",
null,
"https://lh6.googleusercontent.com/92qef_mdEzFqqkODbu_Xa6sbNXdIzlzw8FtwcTpWXMCYdioNQ_qB-4LhVwIH2SymV2opR514uvn2WOf6OEW-ibY-HrFCyIAzdxq53P7sAMv0nBs9yK2EBkvONG7klfaBmw=w1280",
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.85009795,"math_prob":0.5475514,"size":2095,"snap":"2022-27-2022-33","text_gpt3_token_len":405,"char_repetition_ratio":0.1860354,"word_repetition_ratio":0.063897766,"special_character_ratio":0.17804296,"punctuation_ratio":0.09269663,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.96191204,"pos_list":[0,1,2,3,4,5,6,7,8,9,10,11,12,13,14],"im_url_duplicate_count":[null,1,null,1,null,1,null,1,null,1,null,1,null,1,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2022-08-16T14:03:37Z\",\"WARC-Record-ID\":\"<urn:uuid:aff27531-a463-43f3-a1e8-3f3808350a95>\",\"Content-Length\":\"87412\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:19b4f50c-389f-4707-b9e7-2b9872838ff7>\",\"WARC-Concurrent-To\":\"<urn:uuid:01e12857-2d25-432f-8f11-17ee7d32a17e>\",\"WARC-IP-Address\":\"172.217.2.115\",\"WARC-Target-URI\":\"https://elearn-rt-en.gunt.de/3-controllers-and-controller-types/3-1-controller-transmission-behaviour\",\"WARC-Payload-Digest\":\"sha1:TOYI2BD2H7E442EKRVTX4PDIXSYJ7PF5\",\"WARC-Block-Digest\":\"sha1:TTR7QQ2I5QKNMHKOHSVRAKZJATFB75US\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2022/CC-MAIN-2022-33/CC-MAIN-2022-33_segments_1659882572304.13_warc_CC-MAIN-20220816120802-20220816150802-00666.warc.gz\"}"} |
https://pages.vassar.edu/magnes/final-data/ | [
"# Final Data\n\nIn this post I will present my actual data findings with minimal interpretation. In the next blog post, “Conclusion,” I will interpret the data I collected and compare it to expected values.\n\n### Preliminary Data Recap:\n\nIn my previous post I had measured the discharge of several different capacitor values in series with an inductor.\n\nBelow were the resulting plots of Voltage vs Time (Figures 1-3):\n\nFor the 1465, 1007, and 47 nF capacitors the measured frequency of oscillation was 128, 155, and 730 Hz, respectively.\n\n### Voltage As a Function Of Time and Frequency of Oscillation\n\nIt is helpful to layer these three plots on top of each other (Figure 4). In doing so we can readily compare the curves to each other.\n\nFrom Figure 4 it is evident that the higher the capacitor value, the lower the frequency of oscillation. This is not surprising, given the equation that the frequency and inductor*capacitor product are inversely related:",
null,
".\n\nHow are frequency and capacitance, or frequency and inductance related? I recorded the frequency of oscillation in several different LC circuits to try and illustrate this relationship. For three different inductor values I discharged five different capacitor values. The resulting plot (Figure 5) is below:\n\nBecause it is harder to see the shape of the blue line in Figure 5, I plotted it separately (Figure 6):\n\nFigures 5 and 6 experimentally illustrate the inverse square root relationship between frequency and capacitance/inductance.\n\nI then plotted the frequency of oscillation with respect to inductor value (Figure 7):\n\n### Exponential Rate Of Decay\n\nIf you take a look at Figure 4 again, notice that despite changing capacitor values, the exponential decay of each curve is relatively the same. The decay for each curve is the same because the decay coefficient β is a function of resistance and inductance, not capacitance(",
null,
"). In Equation (1) you can see the decay term of the voltage, e^(-βt):",
null,
"(1)\n\nIn order to measure the decay constant I used Origin Pro to fit an exponential curve to the peaks of the voltage plots. The formula used for this function fit was as follows:",
null,
"Where R0 is the decay coefficient, -β\n\nFigure 8 below is an example of this function fit:",
null,
"Figure 8\n\nI fit an exponential function to the 996 mH and 1007 nF, 47 nF oscillations as well, resulting in the table below (Figure 9):\n\nTheoretically the β value should be the same for all of them.\n\nIn order to explore how the decay coefficient β changes I needed to change the inductor values. Because the voltage curves were more manageable at greater LC values, I used the largest capacitor I had and varied the inductor value. The results were as follows (Figures 10-11):\n\nThe resulting decay coefficients are as follows (Figure 12):\n\nWhich can also be represented in as a scatter plot, despite having so few points(Figure 13):"
] | [
null,
"https://pages.vassar.edu/magnes/wp-content/ql-cache/quicklatex.com-3846befc02e30525946dcbd26531f39a_l3.png",
null,
"https://pages.vassar.edu/magnes/wp-content/ql-cache/quicklatex.com-743184c97ab219269c0c3f3fd7cbd0d0_l3.png",
null,
"https://pages.vassar.edu/magnes/wp-content/ql-cache/quicklatex.com-a548b249cf71c4644ad2c71d2ec0c460_l3.png",
null,
"http://pages.vassar.edu/magnes/files/2014/05/gif.latex_.gif",
null,
"http://pages.vassar.edu/magnes/files/2014/05/996-mH-exp-fit.jpg",
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.9145097,"math_prob":0.9460685,"size":2812,"snap":"2023-40-2023-50","text_gpt3_token_len":623,"char_repetition_ratio":0.14280626,"word_repetition_ratio":0.0,"special_character_ratio":0.21763869,"punctuation_ratio":0.096045196,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9994136,"pos_list":[0,1,2,3,4,5,6,7,8,9,10],"im_url_duplicate_count":[null,null,null,null,null,null,null,null,null,null,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2023-09-28T21:28:27Z\",\"WARC-Record-ID\":\"<urn:uuid:a1f4cb1e-51eb-4823-80f7-086d9cd0624d>\",\"Content-Length\":\"61067\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:a9463bad-2459-454d-9fc7-ddded6d61d4f>\",\"WARC-Concurrent-To\":\"<urn:uuid:4c7027b1-7384-4802-9f81-b5a6ba9ca24b>\",\"WARC-IP-Address\":\"143.229.0.73\",\"WARC-Target-URI\":\"https://pages.vassar.edu/magnes/final-data/\",\"WARC-Payload-Digest\":\"sha1:F5NVG4AEEVAND4CDQIIZRA63W75YVGDU\",\"WARC-Block-Digest\":\"sha1:6XYDZRVJ5HH3RSYMDVYBHICAJHU2NPL4\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2023/CC-MAIN-2023-40/CC-MAIN-2023-40_segments_1695233510454.60_warc_CC-MAIN-20230928194838-20230928224838-00145.warc.gz\"}"} |
https://www.intlpress.com/site/pub/pages/journals/items/cag/content/vols/0024/0002/a007/index.html | [
"# Communications in Analysis and Geometry\n\n## Volume 24 (2016)\n\n### Compact embedded minimal surfaces in $\\mathbb{S}^2 \\times \\mathbb{S}^1$\n\nPages: 409 – 429\n\nDOI: http://dx.doi.org/10.4310/CAG.2016.v24.n2.a7\n\n#### Authors\n\nJosé M. Manzano (Department of Mathematics, King’s College London, The Strand, London, United Kingdom)\n\nJulia Plehnert (Discrete Differential Geometry Lab, University of Göttingen, Germany)\n\nFrancisco Torralbo (Departamento Ciencias Básicas, Centro Universitario de la Defensa (CUD) San Javier, Santiago de la Rivera, Spain)\n\n#### Abstract\n\nWe prove that closed surfaces of all topological types, except for the non-orientable odd-genus ones, can be minimally embedded in $\\mathbb{S}^2 \\times \\mathbb{S}^1 r$, for arbitrary radius $r$. We illustrate it by obtaining some periodic minimal surfaces in $\\mathbb{S}^2 \\times \\mathbb{R}$ via conjugate constructions. The resulting surfaces can be seen as the analogy to the Schwarz P-surface in these homogeneous $3$-manifolds.\n\n#### 2010 Mathematics Subject Classification\n\nPrimary 53A10. Secondary 53C30.\n\nFull Text (PDF format)\n\nPublished 14 June 2016"
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.70207983,"math_prob":0.4367388,"size":764,"snap":"2019-13-2019-22","text_gpt3_token_len":219,"char_repetition_ratio":0.13421053,"word_repetition_ratio":0.020618556,"special_character_ratio":0.2827225,"punctuation_ratio":0.12587413,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9622488,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2019-03-21T20:09:45Z\",\"WARC-Record-ID\":\"<urn:uuid:6625db04-0dd4-4b1a-8fbb-12200aa16b72>\",\"Content-Length\":\"8831\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:74fa24e0-7baf-4ba6-a403-41cee5459cde>\",\"WARC-Concurrent-To\":\"<urn:uuid:d8077a0b-11ef-4004-ac9c-0156985c3381>\",\"WARC-IP-Address\":\"107.180.41.239\",\"WARC-Target-URI\":\"https://www.intlpress.com/site/pub/pages/journals/items/cag/content/vols/0024/0002/a007/index.html\",\"WARC-Payload-Digest\":\"sha1:EM4XCA3OZWW6RM4EIOTQI4WP3Z4E5CAI\",\"WARC-Block-Digest\":\"sha1:QZUN7PBJWDOVSSM7IE3RIVIWGKVFJR4I\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2019/CC-MAIN-2019-13/CC-MAIN-2019-13_segments_1552912202572.29_warc_CC-MAIN-20190321193403-20190321215403-00327.warc.gz\"}"} |
http://slideplayer.com/slide/5297199/ | [
"",
null,
"Volume of Rectangular Prism and Cylinder Grade 6.\n\nPresentation on theme: \"Volume of Rectangular Prism and Cylinder Grade 6.\"— Presentation transcript:\n\nVolume of Rectangular Prism and Cylinder Grade 6\n\nConfidential 2 Warm Up Find the Surface area of each rectangular Prism to the nearest tenth 5.5cm 2.3cm 10cm 1. 2. 7.8 in. 6.2 in. 5.4 in.\n\nConfidential 3 Warm Up Find the surface area of Cylinders: 4. r = 6mm, h = 10 mm 5. r = 3.5 ft, h = 24 ft 3. Write the formula for the surface area of a Cube in which each edge measures x units.\n\nConfidential 4 Surface Area of a Prism The surface area of a prism is the sum of the areas of all the sides of the prism. The formula for the surface area of a prism therefore depends on the type of prism. Surface Area of a Cylinder The surface area of a cylinder is the sum of the areas of the two bases and the lateral face of the cylinder. surface area of a cylinder = 2* r 2 + 2 rh Lets review what we have learned in the last lesson\n\nConfidential 5 Types of prism The name of a prism depends upon its base polygons. If the bases are triangles, then it is a TRIANGULAR prism. A RECTANGULAR prism has bases which are rectangles. The other types of prisms are pentagonal prism, hexagonal prism and octagonal prism. Surface Area of prism: Surface Area of any prism = Lateral area + Area of two ends\n\nConfidential 6 What is volume? The amount of space occupied by an object is called its volume. Cubic units are used to measure the volume. For example m 3, cm 3, in 3, ft 3 etc.\n\nConfidential 7 Volume of Rectangular Prism Prism is a 3D figure. The volume of a rectangular prism is given by the formula: Volume = l × b × h Where l is the length of the rectangular prism. b is the width of the rectangular prism. h is the height of the rectangular prism.\n\nConfidential 8 Practice Example 1: Find the volume of the rectangular prism whose length is 12 cm, width 6 cm and height 8cm. Solution: Volume = l × b × h Volume = 12 × 6 × 8 Volume = 576 cm 3 The volume of the rectangular prism is 576 cm 3. Volume = l x b x h\n\nConfidential 9 Practice Example 2: Find the volume of the rectangular prism whose length is 6 in, width 6 in and height 4 in. Solution: Volume = l × b × h Volume = 6 × 6 × 4 Volume = 144 in 3 The volume of the rectangular prism is 144 in 3. Volume = l x b x h\n\nConfidential 10 Volume of Cylinder Cylinder is a 3D figure. The volume of a cylinder is given by the formula: Volume = r 2 h Where r is the radius of the base of the cylinder. h is the height of the rectangular prism. and pi = 3.14.\n\nConfidential 11 Practice Example 3: Find the volume of the cylinder whose radius is 10 cm and height 6cm. Solution: Volume = r 2 h Volume = 3.14 × 10 2 × 6 Volume = 1884 cm 3 The volume of the cylinder is 1884 cm 3. Volume = r 2 h\n\nConfidential 12 Practice Example 4: Find the volume of the cylinder whose diameter is 22 cm and height 14 cm. Solution: Radius r = Diameter/2 = 22/2 = 11 cm Volume = r 2 h Volume = 3.14 × 11 2 × 14 Volume = 5319.6 cm 3 The volume of the cylinder is 5319.6 cm 3. Volume = r 2 h\n\nConfidential 13\n\nConfidential 15 Your Turn Find the volume of the rectangular prism whose: 1. l=5 cm, b = 3 cm, h = 4 cm 2. l=4 in, b = 3 in, h = 5 in 3. l=12 cm, b = 2 cm, h = 7cm 4. l=10 m, b = 5 m, h = 5 m 5. l=5 km, b = 5 km, h = 11km\n\nConfidential 16 Your Turn Find the volume of the cylinder whose: 6. r = 5 cm, h = 4 cm 7. r = 10 in, h = 2 in 8. r = 1 km, h = 5 km 9. r = 1 m, h = 1 m 10. r = 2 cm, h = 2 cm\n\nConfidential 17 Q1: Find the length of the rectangular prism whose area is 980 cm 3, width is 10cm and height is 7 cm.\n\nConfidential 18 Q2: Find the height of the cylinder whose area is 314 cm 3, and radius is 10 cm.\n\nConfidential 19 Q3: A match box measures 4cm by 2 cm by 2 cm. What will be the volume of the a packet containing a maximum of 12 such boxes?\n\nConfidential 20 Let Us Review The amount of space occupied by an object is called its volume. The volume of a rectangular prism is given by the formula: Volume = length × width × height The volume of a cylinder is given by the formula: Volume = π (radius) 2 x height\n\nConfidential 21 You Had a Great Lesson Today! Remember to practice what you have learned today\n\nDownload ppt \"Volume of Rectangular Prism and Cylinder Grade 6.\"\n\nSimilar presentations"
] | [
null,
"http://slideplayer.com/static/blue_design/img/slide-loader4.gif",
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.8699626,"math_prob":0.9964687,"size":4266,"snap":"2019-43-2019-47","text_gpt3_token_len":1290,"char_repetition_ratio":0.2114031,"word_repetition_ratio":0.19146608,"special_character_ratio":0.31973746,"punctuation_ratio":0.115188584,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.99954855,"pos_list":[0,1,2],"im_url_duplicate_count":[null,null,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2019-10-18T06:38:29Z\",\"WARC-Record-ID\":\"<urn:uuid:2f61a23b-8adb-4074-85f7-9160003578ae>\",\"Content-Length\":\"160867\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:43dc7b14-16fa-48f8-b3c4-00df81567425>\",\"WARC-Concurrent-To\":\"<urn:uuid:8ceffc7b-dea4-4a41-88e3-879170a6bb4e>\",\"WARC-IP-Address\":\"144.76.166.55\",\"WARC-Target-URI\":\"http://slideplayer.com/slide/5297199/\",\"WARC-Payload-Digest\":\"sha1:TVT2MIKRZQPWT3M54KEH5WVWIORCN5TI\",\"WARC-Block-Digest\":\"sha1:VUAI53TSDTG62FZXDPCCFXDFA2IHFNEV\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2019/CC-MAIN-2019-43/CC-MAIN-2019-43_segments_1570986677964.40_warc_CC-MAIN-20191018055014-20191018082514-00082.warc.gz\"}"} |
https://connectedmentor.com/qa/question-is-there-a-prime-number-that-is-even.html | [
"",
null,
"# Question: Is There A Prime Number That Is Even?\n\n## Which are not twin primes?\n\nProperties of Twin Primes(2,3) are not considered as twin primes, since there is no composite number in between them and the difference between the two primes is not equal to 2.5 is an only prime number which is available in two different pairs.More items….\n\n## What is the smallest odd prime number?\n\n33 is the smallest odd prime number.\n\n## Why is 2 an even number?\n\nHow is 2 an even number? An even number is any integer (a whole number) that can be divided by 2. If you can cleanly divide a number by 2, the number is even. … That means the number is even, as it can cleanly be divided by 2, with no remaining remainder.\n\n## Why is 11 not a prime number?\n\nFor 11, the answer is: yes, 11 is a prime number because it has only two distinct divisors: 1 and itself (11). As a consequence, 11 is only a multiple of 1 and 11.\n\n## Why can’t even numbers be prime numbers?\n\nTwo is a prime because it is divisible by only two and one. All the other even numbers are not prime because they are all divisible by two. That leaves only the odd numbers.\n\n## What is the HCF of two Coprime numbers?\n\n1The HCF of two coprime numbers is always 1 .\n\n## What is 1 called if it is not a prime?\n\nA natural number greater than 1 that is not prime is called a composite number. For example, 5 is prime because the only ways of writing it as a product, 1 × 5 or 5 × 1, involve 5 itself. However, 4 is composite because it is a product (2 × 2) in which both numbers are smaller than 4.\n\n## Is 2 prime or even?\n\nProof: The definition of a prime number is a positive integer that has exactly two distinct divisors. Since the divisors of 2 are 1 and 2, there are exactly two distinct divisors, so 2 is prime. … In fact, the only reason why most even numbers are composite is that they are divisible by 2 (a prime) by definition.\n\n## Is 2 and 3 twin primes?\n\nUsually the pair (2, 3) is not considered to be a pair of twin primes. … The first few twin prime pairs are: (3, 5), (5, 7), (11, 13), (17, 19), (29, 31), (41, 43), (59, 61), (71, 73), (101, 103), (107, 109), (137, 139), … OEIS: A077800.\n\n## Why is 28 the perfect number?\n\nA number is perfect if all of its factors, including 1 but excluding itself, perfectly add up to the number you began with. 6, for example, is perfect, because its factors — 3, 2, and 1 — all sum up to 6. 28 is perfect too: 14, 7, 4, 2, and 1 add up to 28.\n\n## What is the fastest way to find a prime number?\n\nTo prove whether a number is a prime number, first try dividing it by 2, and see if you get a whole number. If you do, it can’t be a prime number. If you don’t get a whole number, next try dividing it by prime numbers: 3, 5, 7, 11 (9 is divisible by 3) and so on, always dividing by a prime number (see table below).\n\n## Why is 2 the only prime even number?\n\nExplanation: A prime number can have only 1 and itself as factors. Any even number has 2 as a factor so if the number has itself , 2 and 1 as factors it can not be prime. 2 is an even number that has only itself and 1 as factors so it is the only even number that is a prime.\n\n## Is 1 a prime number?\n\nProof: The definition of a prime number is a positive integer that has exactly two positive divisors. However, 1 only has one positive divisor (1 itself), so it is not prime.\n\n## Are 2 and 3 prime numbers?\n\nThe first five prime numbers: 2, 3, 5, 7 and 11. A prime number is an integer, or whole number, that has only two factors — 1 and itself. Put another way, a prime number can be divided evenly only by 1 and by itself."
] | [
null,
"https://mc.yandex.ru/watch/66668905",
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.9534483,"math_prob":0.99518514,"size":3939,"snap":"2020-45-2020-50","text_gpt3_token_len":1100,"char_repetition_ratio":0.21753494,"word_repetition_ratio":0.13563502,"special_character_ratio":0.30033004,"punctuation_ratio":0.14941302,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9987039,"pos_list":[0,1,2],"im_url_duplicate_count":[null,null,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2020-10-27T06:12:17Z\",\"WARC-Record-ID\":\"<urn:uuid:3b7c5453-8a4b-433d-b114-90e32b65c43a>\",\"Content-Length\":\"35713\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:cdb1a94b-085b-4563-983d-c529dde4888d>\",\"WARC-Concurrent-To\":\"<urn:uuid:132b9547-843f-4aec-9a1a-9858e0679292>\",\"WARC-IP-Address\":\"87.236.16.235\",\"WARC-Target-URI\":\"https://connectedmentor.com/qa/question-is-there-a-prime-number-that-is-even.html\",\"WARC-Payload-Digest\":\"sha1:JRIERLC3TSGLXEUGLOFYXVORJYXBV5AN\",\"WARC-Block-Digest\":\"sha1:KCU6NUHRVL2GIHLAQ5TSQ3S4WI7HGYZH\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2020/CC-MAIN-2020-45/CC-MAIN-2020-45_segments_1603107893402.83_warc_CC-MAIN-20201027052750-20201027082750-00074.warc.gz\"}"} |
http://poradnia13.waw.pl/hemp-oil-zfvdctp/7a5fc5-pv-cell-simulink-model | [
"The overall PV system with MPPT is implemented in MATLAB/Simulink. Cite As srikanth dakoju (2021). mathematical modeling of PV Cell. However, the partial shading has not been considered. To parameterize the model… Fig 1 is model of the most commonly used PV cell; a current source, parallel with on diode, a . Operation and Characteristics of PV or Solar Cells 2.1Principle ofOperation Solar Cell An array of solar cells … developed with Matlab/Simulink and validated with a PV cell and a commercial module. plot (Vpv,Ipv) plot (Vpv, Ppv) ISSN (Print) : 2320 – 3765 ISSN … The proposed method is implemented in MATLAB/Simulink … which models a PV cell is derived from the physics of p–n junction . 2. chapter III the mathematical model of the ideal PV cell and also the practical PV cell are described. 5 Jun 2018. . PVM S PVC = Where M designates a PV module and C designate a PV cell. Equivalent circuit of solar cell and mathematical model for solar cell and array are examined in this paper. A 100-kW PV array is connected to a 25-kV grid via a DC-DC boost converter and a three-phase three-level Voltage Source Converter (VSC). X-Y plotter is used to plot I-V and P-V characteristics XY graph is plotted by Matlab code and is given below. PVM S PVC = I NI. Fig. 3. 36 solar cell are connected in series. The simulink model of a PV cell module is as shown in Fig.3.It is modelled by the (1),(2),(3)&(4) and I-V and P-V graphs are plotted as shown in Fig.7.& Fig.8. QUCS advantages are use equations to define value, for examples in Fig. 5 include variable Ipv and Is (Isat) used in Eq. The most similar will be the best model… These five parameters of PV cell/module are in fact related to two environmental parameters of solar insolation & tem- perature and owing to … Open Model. A PV array model based on the mathematical model of solar cell is developed using MATLAB/Simulink blocks . However, these models are not adequate for application involving hybrid energy system since they need a flexible tuning of some parameters in the system and not easily understandable for readers to use by themselves. Muhammad Anas. Therefore, this paper presents a step-by-step procedure for the simulation of PV cells/modules/ arrays with Tag tools in Matlab/Simulink… As shown in Figs. Maximum Power Point Tracking (MPPT) is implemented in the boost converter by means of a Simulink® model using the 'Incremental Conductance + Integral Regulator' technique. 5.- Model PV Cell for commercial cell in Qucs. Dynamic PV model in Simulink. 2 has been developed. PV (Photovoltaic) systems are one of the most renowned renewable, green and clean sources of energy where power is generated from sunlight converting into electricity by the use of PV solar cells. Updated 19 Jan 2015. Follow; Download. An average model of a small PV farm (400 kW) connected to a 25-kV grid using two-stage converter. 71 Downloads. 7 and 8, the above PV cell model has been used as sub-system and then was masked as a 3.1 Simulation Using Matlab/Simulink Simulink block PV custom icon to facilitate the The simplified PV module model has been simulated integration of the PV module model in any application. 26 Apr 2017. PV characteristic curves of photovoltaic modules. Simulink model for each equation is presented with numerical results for different values of irradiation and temperature. A circuit based simulation model for a PV cell for estimating the IV characteristic curves of photovoltaic panel with respect to changes on environmental parameters (temperature and irradiance) and cell parameters (parasitic resistance and ideality factor).This paper could be used to analyze in the development of MPPT(maximum … None of the simulated modules show filtering. Static PV models, are those of constant temperature and solar radiation inputs, whereas dynamic PV models are those with a varying temperature or solar radiation input. Model a rooftop single-phase grid-connected solar photovoltaic (PV) system. Bode plot of 72 PV cells … 3.9. PV solar panel model using simscape solar cell model. Most of the inputs to the simulator are given in the PV … A vehicle-to-grid system used to … Further V-I and P-V output characteristic of solar PV-cell are … Comments and Ratings (2) sara Ghandi. ..... 18 Figure 15. In Section 2, the physical equations governing the PV module (also applicable to PV cell) are presented. Fig. The model takes solar radiation and cell temperature as input parameters and outputs I–V and P–V characteristics under various conditions and also includes the effect of the temperature variations on the cell characteristics. , a Matlab-based modeling and simulation scheme suitable for studying the I-V and P-V characteristics of a PV … software including Matlab/Simulink. The tabulation of the above numerical results gives the relationship of module parameters with characteristics curves of PV … This model is more accurate than the single diode model especially at low insolation levels; therefore this will gives more accurate prediction of the performance of the solar cell system. Upon the mathematical analysis of the PV cell in Sect. MATLAB/Simulink Model of Solar PV Module and MPPT Algorithm ..... 17 Figure 14. and shunt resistor R. p. Figure 1: Equivalent Circuit of PV cell PV cells are grouped in larger units called PV modules which are further interconnected in a parallel or series configuration to form PV arrays. 5. N. series and N. p = number of cells parallel. The model represents a grid-connected rooftop solar PV that is implemented without an intermediate DC-DC converter. Whereas (Rustemli et al., 2011) implemented an accurate one-diode model, but for a constant ideality factor and Rs. This block allows you to model preset PV modules from the National Renewable Energy Laboratory (NREL) System Advisor Model (2018) as well as PV … Internally the block still simulates only the equations for a single solar cell, but scales up the output voltage according to the number of cells. The modeling of PV array serve as a fundamental component for any research activity related with PV system. This simulation model can be used to show the U-I output characteristics of the PV array under various irradiation levels and temperatures condition. 1. In addition, (Nema et al., 2011) carried out a study on PV cells… As previously investigated, the polarization effects are described using Eq. Meanwhile, this model can … The second model is on mathematical equations and the electrical circuit of the PV panel. This file focuses on a Matlab/SIMULINK model of a photovoltaic cell, panel and array. 24-hour Simulation of a Vehicle-to-Grid (V2G) System. The simulation model developed using MATLAB/Simulink and the results obtained are presented and discussed in chapter IV. The output power and energy from PV … This example shows optimization of the Solar Cell block's parameters to fit data defined over a range of different temperatures. Overview; Models; In this simulation, PV solar panel model using solar cell model available in simscape library. 2, the Matlab/Simulink model of Fig. and is extended to obtain the module output characteristics (Lasnier & Ang, 1990; Samanta, Dash, & Rayaguru, 2014). Within this work, we would apply a numerical model to a p-i-n … The third one is the mathworks PV panel. Modeling Solar Photovoltaic Cell and Simulated Performance Analysis of a 250W PV Module Isl . Then the simulation results obtained are also compared with the standard results provided by the manufacturer. The essential input parameters such as V m , I m , V oc , I sc , N s , KI, T c and G are taken from the manufacturer’s datasheet for the typical 110W modules selected for analysis for standalone sys- tem using two methods, the mathematical modeling and the Also the user can input the PV … The objective of the models is to achieve similar IV and PV characteristics curves to the graphs that are in the datasheet of the manufacturer of the different solar panels. The generic model that shows in Fig. 6, where it is modeled various PV cells changing 3. 6.- Generic Model PV Cell in Qucs. MATLAB; Simulink; Control System Toolbox; MATLAB Release Compatibility. The simulation model of PV array is presented on the basis of PV array’s physical equivalent circuit and its mathematical model by Matlab/Simulink. (4). sseries resistor R . In this study, the PV cell temperature is calculated as a function of the ambient temperature and irradiance variation[ ]: = 1.14 +0.0175 ( 300 ) +30. This model has also been designed in the form of Simulink block libraries. PV modules are coupled together form a PV … It uses the MATLAB® optimization function fminsearch.Other products available for performing this type of parameter fitting with Simscape™ Electrical™ models are the Optimization Toolbox™ and Simulink… Abstract: This paper presents the simulation model of PV-cell in MATLAB/Simulink; further performance of PV module/array is analyzed by simulation results. PV Cell simulation with QUCS 7 2013 Fig. The first model is based on mathematical equations. 1 – PV Cell circuit model The complete behavior of PV cells are described by five model parameters (I ph, N, I s, R s, R sh) which is rep-resentative of a physical PV cell/module . ... one-diode PV cell model as follows: s = number of cells in . This paper carried out a MATLAB/Simulink model of PV cell behavior under different varying parameters such as solar radiation, ambient temperature, series resistor, shunt resistor, etc. Unlike fossil fuels, solar energy has great environmental advantages as they have no harmful emissions during power generation. V NV. Partial shading of a 250-W PV module consisting of 60 cells connected in series. ..... 16 Figure 13. each solar cell … According to equations a voltage feedback is required … Description. Model for simulation of a solar cell has been developed in Simelectronics (MATLAB/Simulink) using solar cell block and other interfacing blocks. The thermal network models the heat exchange that occurs between the physical components of the PV panel (glass cover, heat exchanger, back cover) and the … Artificial Neural Network based tracker technique is proposed. View License × License. A solar cell block is available in simelectronics, which was used with many other … This results in a more efficient simulation than if equations for each cell … The electrical portion of the network contains a Solar Cell block, which models a set of photovoltaic (PV) cells, and a Load subsystem, which models a resistive load. MATLAB / Simulink software package. This example supports design decisions about the number of panels and the connection topology required to deliver the target power. I am trying to construct a PV array in simulink. () Continuous Powergui Load and measurement Cell temperature Irradiance G G T w PV I yI T C T C V y V y Wind speed Outside temp F : e Matlab/Simulink block diagram of PV model… Dynamic PV model of 72 PV cells in series (3 sets of 24 cells) in Simulink. The array is built of strings of modules connected in parallel, each string consisting of modules connected in series. Solar Cell Model in Matlab / Simulink “ Embedded MATLAB Function ” B. am2013.pdf. You can model any number of solar cells connected in series using a single Solar Cell block by setting the parameter Number of series cells to a value larger than 1. My motto is to observe characteristic for partial shading PV array with different irradiation's for each module.I have modeled individual PV modules as current sources with series and parallel combination of solar cells. Partial Shading of a PV Module. In Ref. Bode plot of Module D from 1 Hz to 100 kHz using the equivalent dynamic circuit values from impedance spectroscopy. This later has been constructed under Matlab/Simulink as shown in Fig. to achieve a circuit based simulation model of a Photovoltaic (PV) cell in order to estimate the electrical behavior of the practical cell with respect to change in environmental parameters like irradiation and temperature. This model can be used to get characteristic curves of any type of PV … Open Model . PV cell circuit model and equations PV cell + _ Rs VD Rp I ID SC − − − PV =0 p D SC D I R V I I = (VD /VT −1) ID Io e VPVcell =VD −RsIPV KCL: Diode characteristic: KVL: ECEN2060 4 2 Ppv 1 Vpv Switch Saturation Rs Rs Product Io*(exp(u/Vt)-1) PN-junction characteristic Ns Ns max MinMax G Insolation to current gain Diode … Model developed in Simulink environment / SimPowerSystems. The PV Array block implements an array of photovoltaic (PV) modules. 10 Ratings. The main aim of this work is the improvement of the PV solar cell simulator based on a two-diode model. A Simulation model for simulation of a single solar cell and two solar cells in series has been developed using Sim electronics (Mat lab /Simulink) environment and is presented here in this paper. Requires. Paper Linked to these data: https://hal.archives … Created with R2009a … In this paper, a PV … 2. Of a small PV farm ( 400 kW ) connected to a 25-kV using... Decisions about the number of cells in strings of modules connected in series according to equations a feedback. = Where M designates a PV cell model available in simscape library serve as fundamental... From impedance spectroscopy = Where M designates a PV cell grid-connected rooftop solar PV is. Simulink block libraries Where M designates a PV cell irradiation levels and condition. Unlike fossil fuels, solar energy has great environmental advantages as they have no harmful emissions during power.! A constant ideality factor and Rs plotted by MATLAB code and is given below different values of irradiation and.! Toolbox ; MATLAB Release Compatibility implemented without an intermediate DC-DC converter impedance spectroscopy under MATLAB/Simulink as shown Fig! Has not been considered PV module ( also applicable to PV cell a voltage feedback is required … PV panel. By the manufacturer previously investigated, the partial shading of a 250-W PV module consisting of cells! Obtained are presented and discussed in chapter IV shading has not been considered been! Are described using Eq research activity related with PV System with MPPT is implemented in MATLAB/Simulink ….. Connected in series cells connected in parallel, each string consisting of 60 cells connected in parallel, each consisting! On mathematical equations and the results obtained are also compared with the results... Be used to plot I-V and P-V characteristics XY graph is plotted by MATLAB code and is given.... Harmful emissions during power generation 2, the partial shading has not been considered //hal.archives … Description have harmful. Physical equations governing the PV module and C designate a PV module and C a! ) carried out a study on PV cells… software including MATLAB/Simulink 3 sets of 24 cells ) in.. Using the equivalent dynamic circuit values from impedance spectroscopy ( V2G ) System P-V characteristics XY graph plotted! Power generation topology required to deliver the target power various irradiation levels and temperatures condition results provided by the.. Carried out a study on PV cells… software including MATLAB/Simulink and n. =... Commercial cell in Sect DC-DC converter PV model in Simulink fuels, solar energy has great environmental as. Simulation results = Where M designates a PV cell and mathematical model for solar cell and array are examined this... Model in Simulink, PV solar panel model using solar cell and a module. In parallel pv cell simulink model each string consisting of modules connected in series from spectroscopy! Section 2, the physical equations governing the PV array serve as a fundamental component any... … Description decisions about the number of cells parallel apply a numerical model to a grid... The physical equations governing the PV array block implements an array of photovoltaic ( PV ) modules and energy PV! ) in Simulink connection topology required to deliver the target power ; Models ; in simulation! Has also been designed in the form of Simulink block libraries results provided by the.. The simulation results the PV module consisting of 60 cells connected in series ( 3 sets 24. Model can be used to plot I-V and P-V characteristics XY graph is plotted by MATLAB and! Second model is on mathematical equations and the results obtained are also compared with standard. This work, we would apply a numerical model to a 25-kV using. Obtained are also compared with the standard results provided by the manufacturer characteristics graph. Advantages are use equations to define value, for examples in Fig changing dynamic PV model in Simulink ).! Cell model addition, ( Nema et al., 2011 ) implemented accurate. Of strings of modules connected in series Where M designates a PV cell for commercial cell in Qucs is! Implemented an accurate one-diode model, but for a constant ideality factor and Rs cell and a module. Array under various irradiation levels and temperatures condition PVC = Where M a! Isat ) used in Eq simulation model can be used to show the U-I output characteristics of the PV block. Is built of strings of modules connected in series MATLAB Release Compatibility as they have no emissions... Matlab code and is given below related with PV System with MPPT implemented! 2, the physical equations governing the PV array serve as a component! Of PV module/array is analyzed by simulation results MATLAB Release Compatibility fuels, solar energy has great advantages! The partial shading has not been considered and a commercial module has constructed! Mathematical analysis of the PV solar panel model using simscape solar cell model rooftop solar PV that implemented... 400 kW ) connected to a p-i-n … PV solar panel model using solar cell based. Model as follows: s = number of panels and the electrical circuit of solar model. Has been constructed under MATLAB/Simulink as shown in Fig has been constructed MATLAB/Simulink. ; further performance of PV module/array is analyzed by simulation results obtained are presented and discussed in chapter.! However, the polarization effects are described using Eq ]... one-diode PV cell commercial...: https: //hal.archives … Description of photovoltaic modules been pv cell simulink model under MATLAB/Simulink as in. ; Control System Toolbox ; MATLAB Release Compatibility modules connected in series 3., each string consisting of modules connected in series cell for commercial cell in Qucs in this simulation model be... / Simulink software package the target power the output power and energy PV! As shown in Fig example supports design decisions about the number of cells parallel MATLAB/Simulink and the electrical circuit solar. Modeling of PV array serve as a fundamental component for any research activity with! Developed with MATLAB/Simulink and the results obtained are also compared with the results.... one-diode PV cell a numerical model to a 25-kV grid using two-stage converter curves of photovoltaic.... Model of 72 PV cells changing dynamic PV model in Simulink show the U-I output characteristics of the PV serve. Matlab/Simulink ; further performance of PV module/array is analyzed by simulation results in the form Simulink! A small PV farm ( 400 kW ) connected to a 25-kV grid using two-stage converter cells in! No harmful emissions during power generation presented with numerical results for different values of and! Of irradiation and temperature to equations a voltage feedback is required … PV characteristic curves of photovoltaic PV. Emissions during power generation, the physical equations governing the PV array various! Simulation of a Vehicle-to-Grid ( V2G ) System the target power model for each is... By simulation results obtained are also compared with the standard results provided by the manufacturer the model… modeling. And array are examined in this paper an array of photovoltaic modules results obtained are.... Rustemli et al., 2011 ) implemented an accurate one-diode model, for... Available in simscape library serve as a fundamental component for any research activity related with System! Research activity related with PV System method is implemented in MATLAB/Simulink … Fig: https: //hal.archives ….! For a constant ideality factor and Rs as shown in Fig and is given below MATLAB/Simulink and the connection required... ; MATLAB Release pv cell simulink model ) are presented apply a numerical model to a 25-kV grid using converter! Different values of irradiation and temperature of 60 cells connected in parallel, each string of! Modeling pv cell simulink model PV cell model as follows: s = number of panels the... This simulation, PV solar panel model using simscape solar cell and array are examined in this.. Pv panel is modeled various PV cells changing dynamic PV model of PV-cell in MATLAB/Simulink the! 24 cells ) in Simulink of 72 PV cells changing dynamic PV model of PV. Data: https: //hal.archives … Description described using Eq from impedance spectroscopy PV cells in mathematical equations the...: this paper model using simscape solar cell and a commercial module paper to... C designate a PV cell a constant ideality factor and Rs and in. Simulation model developed using MATLAB/Simulink and validated pv cell simulink model a PV cell ) are presented abstract this. Designed in the form of Simulink block libraries deliver the target power an one-diode... Of the PV panel that is implemented in MATLAB/Simulink … Fig X-Y is! Software including MATLAB/Simulink grid-connected rooftop solar PV that is implemented without an intermediate converter. The proposed method is implemented in MATLAB/Simulink ; further performance of PV cell for commercial cell in Sect PV. An accurate one-diode model, but for a constant ideality factor and Rs mathematical modeling of PV array various. ] X-Y plotter is used to plot I-V and P-V characteristics XY graph is plotted by MATLAB code is... Modules connected in series panels and the electrical circuit of solar cell simulator based on a two-diode.. String consisting of 60 cells connected in series numerical model to a p-i-n … solar... And the electrical circuit of solar cell simulator based on a two-diode.! Temperatures condition value, for examples in Fig the improvement of the solar. Environmental advantages as they have no harmful emissions during power generation cells connected series! Et al., 2011 ) implemented an accurate one-diode model, but for constant. X-Y plotter is used to show the U-I output characteristics of the PV serve. Equation is presented with numerical results for different values of irradiation and temperature PV panel Control System Toolbox MATLAB! ( V2G ) System as they have no harmful emissions during power generation temperatures condition, this can! Simulation of a 250-W PV module and C designate a PV module and C designate PV. Cells parallel / Simulink software package show the U-I output characteristics of PV!"
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.8612032,"math_prob":0.8912776,"size":23001,"snap":"2021-21-2021-25","text_gpt3_token_len":4878,"char_repetition_ratio":0.15597686,"word_repetition_ratio":0.19261424,"special_character_ratio":0.2102952,"punctuation_ratio":0.10829222,"nsfw_num_words":1,"has_unicode_error":false,"math_prob_llama3":0.9925072,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2021-06-14T04:46:39Z\",\"WARC-Record-ID\":\"<urn:uuid:320954b6-dfcc-4ca8-8318-a8f00bec4243>\",\"Content-Length\":\"36923\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:ec8980c3-7643-496e-add4-83bead01cf8e>\",\"WARC-Concurrent-To\":\"<urn:uuid:f7a75e5c-6f0a-446b-9d9a-9c599b040010>\",\"WARC-IP-Address\":\"46.41.144.58\",\"WARC-Target-URI\":\"http://poradnia13.waw.pl/hemp-oil-zfvdctp/7a5fc5-pv-cell-simulink-model\",\"WARC-Payload-Digest\":\"sha1:WDSNKOU4RCSS27W4SFFJUAU6RHW64AOA\",\"WARC-Block-Digest\":\"sha1:JHVRSRJH75GKK5M63LI6HJ25QMVWMRVV\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2021/CC-MAIN-2021-25/CC-MAIN-2021-25_segments_1623487611445.13_warc_CC-MAIN-20210614043833-20210614073833-00013.warc.gz\"}"} |
https://www.causal.app/excel/how-to-sum-absolute-values | [
"Excel Guides\n\n## How to Sum Absolute Values in Excel\n\nTo sum absolute values in Excel, you can use the ABS function. This function returns the absolute value of a number, which is a number without its sign. So, if a number is positive, the ABS function will return the same number. If a number is negative, the ABS function will return the positive version of that number.\n\nFor example, let's say you have a list of numbers in column A and you want to sum the absolute values of those numbers. You can use the following formula:\n\n``````=SUM(ABS(A1:A5))\n``````\n\nThis formula will sum the absolute values of the numbers in cells A1 through A5.\n\n### Excel\n\nGet started with Causal today.\nBuild models effortlessly, connect them directly to your data, and share them with interactive dashboards and beautiful visuals."
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.79381466,"math_prob":0.9700611,"size":571,"snap":"2022-05-2022-21","text_gpt3_token_len":128,"char_repetition_ratio":0.17107584,"word_repetition_ratio":0.06,"special_character_ratio":0.22241682,"punctuation_ratio":0.11570248,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.99098986,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2022-05-21T23:02:23Z\",\"WARC-Record-ID\":\"<urn:uuid:3c873cbf-6f8d-4e9f-9e2c-18f5ab3542e4>\",\"Content-Length\":\"10751\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:848135fa-96cb-477d-9ca1-4189f61efd61>\",\"WARC-Concurrent-To\":\"<urn:uuid:1ec5f39b-b96e-4c33-95e3-4cbc642aa5fb>\",\"WARC-IP-Address\":\"184.73.183.75\",\"WARC-Target-URI\":\"https://www.causal.app/excel/how-to-sum-absolute-values\",\"WARC-Payload-Digest\":\"sha1:JACREZLRURGPXMTPDUCH3XG7Q7K7OT47\",\"WARC-Block-Digest\":\"sha1:EQOHQL3BJY3PHY6DJA7IVSVUN3AL2JXI\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2022/CC-MAIN-2022-21/CC-MAIN-2022-21_segments_1652662541747.38_warc_CC-MAIN-20220521205757-20220521235757-00071.warc.gz\"}"} |
http://www.ncl.ucar.edu/Document/Functions/Built-in/dim_sum_n.shtml | [
"",
null,
"NCL Home > Documentation > Functions > General applied math\n\n# dim_sum_n\n\nComputes the arithmetic sum of a variable's given dimension(s) at all other dimensions.\n\n## Prototype\n\n```\tfunction dim_sum_n (\nx : numeric,\ndims [*] : integer\n)\n\nreturn_val : float or double\n```\n\n## Arguments\n\nx\n\nA variable of numeric type and any dimensionality.\n\ndims\n\nThe dimension(s) of x on which to calculate the sum. Must be consecutive and monotonically increasing.\n\n## Return value\n\nThe output will be double if x is double, and float otherwise.\n\nThe output dimensionality will be the same as all but dims's dimensions of the input variable. The dimension rank of the input variable will be reduced by the rank of dims.\n\n## Description\n\nThe dim_sum_n function computes the sum of all elements of the dimensions indicated by dims' for each index of the remaining dimensions. Missing values are ignored.\n\nUse the dim_sum_n_Wrap function if metadata retention is desired. The interface is identical.\n\n## Examples\n\nExample 1\n\nCreate a variable, q, of size (3,5,10) array. Then calculate the sum of the rightmost dimension.\n\n``` q = random_uniform(-20,100,(/3,5,10/))\nqav = dim_sum_n(q,2) ;==> qav(3,5)\n\n; Use dim_sum_n_Wrap if metadata retention is desired\n; qav = dim_sum_n_Wrap(q,2) ;==> qav(3,5)\n```\nExample 2\n\nLet x be of size (ntim,nlat,mlon) and with named dimensions \"time\", \"lat\" and \"lon\", respectively. Then, for each time and latitude, the zonal sum (i.e., sum of all non-missing longitudes) is:\n\n``` xSumLon = dim_sum_n(x,2) ; ==> xSumLon(ntim,nlat)\n\n; Use dim_sum_n_Wrap if metadata retention is desired\n; xSumLon = dim_sum_n_Wrap(x,2) ; ==> xSumLon(time,lat)\n```\nExample 3\n\nLet x be defined as in Example 2: x(time,lat,lon). Compute the sum over time at each latitude/longitude grid point.\n\n``` xSumTime = dim_sum_n(x, 0) ; ==> xSumTime(nlat,nlon)\n\n; Use dim_sum_n_Wrap if metadata retention is desired\n; xSumTime = dim_sum_n_Wrap(x, 0) ; ==> xSumTime(lat,lon)\n```\nExample 4\n\nLet x be defined as x(time,lev,lat,lon). Compute the sum over time and level at each latitude/longitude grid point.\n\n``` xSum = dim_sum_n(x, (/0,1/)) ; ==> xSum(nlat,nlon)\n\n; Use dim_sum_n_Wrap if metadata retention is desired\n; xSum = dim_sum_n_Wrap(x, (/0,1/)) ; ==> xSum(nlat,nlon)\n```\nTo compute the sum over lat and lon at each time/lev grid point:\n``` xSum = dim_sum_n(x,(/2,3/)) ; ==> xSum(nlev,ntim)\n\n; Use dim_sum_n_Wrap if metadata retention is desired\n; xSum = dim_sum_n_Wrap(x,(/2,3/)) ; ==> xSum(nlev,ntim)\n```\nExample 5\n\nLet p(time,lat,lon) contain hourly (eg, 0Z, 1Z, ... 23Z) accumulated precipitation totals. Create a variable containing accumulated 6-hour (0Z, 6Z, 12Z, 18Z) totals. Note: The subscripting below assigns the 0Z-to-5Z total to the 0 subscript (0Z time); the 6Z-to-11Z total to subscript 1 (6Z time); etc. If different assignments are desired the user should make the appropriate adjustments.\n\n``` dimp = dimsizes( p )\nntim = dimp(0) ; number of times in array\nnlat = dimp(1)\nmlon = dimp(2)\n\nnhr = 6 ; 24 for daily total; 12 for twelve hour total\n\nnhrdim = ntim/nhr ; number of nhr-hour segments\n\nptot = new ( (/nhrdim,nlat,mlon/), typeof(p), getFillValue(p) )\nntStrt = 0\nntLast = nhr-1\n\ndo nt=0,ntim-1,nhr\nptot(nt/nhr,:,:) = dim_sum_n( p(ntStrt:ntLast,:,:) , 0)\n\nntStrt = ntStrt + nhr\nntLast = ntLast + nhr\nend do\n; optional meta data assignment\n; unnecessary if using dim_sum_n_Wrap\ncopy_VarMeta(p(::nhr,:,:), ptot) ; meta data; ::nhr makes time assignment\nptot@long_name = nhr+\"-hr accumulated ...\"\n\nprintVarSummary( ptot )\nprintMinMax( ptot, True )\n```"
] | [
null,
"http://www.ncl.ucar.edu/Images/NCL_NCAR_NSF_banner.png",
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.52866465,"math_prob":0.99954,"size":3566,"snap":"2022-05-2022-21","text_gpt3_token_len":1078,"char_repetition_ratio":0.1521617,"word_repetition_ratio":0.06591337,"special_character_ratio":0.29444757,"punctuation_ratio":0.22330096,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9998696,"pos_list":[0,1,2],"im_url_duplicate_count":[null,null,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2022-05-25T17:36:57Z\",\"WARC-Record-ID\":\"<urn:uuid:13543cfe-0902-4d23-a271-2c06e8a1ddb4>\",\"Content-Length\":\"21162\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:e3ecebf1-c43a-436b-84ed-4b60cca9c104>\",\"WARC-Concurrent-To\":\"<urn:uuid:54a0e5c6-1f3f-4449-a119-a0873a439356>\",\"WARC-IP-Address\":\"128.117.225.48\",\"WARC-Target-URI\":\"http://www.ncl.ucar.edu/Document/Functions/Built-in/dim_sum_n.shtml\",\"WARC-Payload-Digest\":\"sha1:SPXBZVUY547VFCDPD5VYJXZIH3KC5HGD\",\"WARC-Block-Digest\":\"sha1:OMIZ6B5ML2WAV7TDGG4U4PYQVLDW7HCD\",\"WARC-Identified-Payload-Type\":\"application/xhtml+xml\",\"warc_filename\":\"/cc_download/warc_2022/CC-MAIN-2022-21/CC-MAIN-2022-21_segments_1652662588661.65_warc_CC-MAIN-20220525151311-20220525181311-00151.warc.gz\"}"} |
https://tiagoms.com/posts/gamlss/ | [
"# GAMLSS: Exploring its applications beyond traditional regression modeling\n\nR\nGAMLSS\nregression\nAuthors\n\nTiago Mendonça dos Santos\n\nLucas Petri Damiani\n\nPublished\n\nJune 1, 2023\n\nGeneralized Additive Models for Location Scale and Shape (GAMLSS) are a type of statistical model that allows for simultaneous modeling of the mean, variance, and shape of data distributions. These models were introduced by and extend Generalized Additive Models (GAMs). GAMLSS allows for location, scale and shape parameters to depend on explanatory variables, which is particularly useful in many applications where variability and distribution shape are important. One of the advantages of GAMLSS is its ability to model complex distributions, such as mixture distributions and zero-inflated distributions.\n\nThis post describes some applications of GAMLSS, which will be updated over time. Some examples of applications include modeling length of stay (LOS), ventilator-free days, temperature, mortality, and income, among others. In this post, we explore some of these applications and demonstrate how GAMLSS can be used to accurately model the data.\n\nThe main references for the applications presented here are the following books:\n\nAt the end of this post, you’ll find a list of links to relevant materials on the subject.\n\nTo perform the analyses presented here, we’ll be using the following packages and supporting functions:\n\nlibrary(tidyverse)\nlibrary(patchwork)\nlibrary(rsample)\nlibrary(gamlss)\nlibrary(gamlss.dist)\nlibrary(gamlss.tr)\n\ntheme_set(theme_bw())\n\ninv_logit <- function(p) exp(p) / (1 + exp(p))\n\n# Application of Zero Inflated Beta Binomial (ZIBB)\n\nIn the next section, we will introduce the beta binomial (BB) distribution and some of its variations, as well as the zero-inflated beta binomial (ZIBB) distribution. To demonstrate how to model these distributions using gamlss, we will provide an example of a control/intervention study.\n\n## Beta Binomial (BB)\n\nThe probabilities of the BB $$\\sim (n, \\mu, \\sigma)$$ distribution can be described by\n\n$P(Y = y|n, \\mu, \\sigma) = \\binom{n}{y}\\frac{\\text{B}(y + \\mu/\\sigma, n + (1 - \\mu)/\\sigma -y)}{\\text{B}(\\mu/\\sigma, (1 - \\mu)/\\sigma)}$\n\nfor $$y = 0, 1, \\dots, n$$, where $$0 < \\mu < 1$$, $$\\sigma > 0$$ and $$n$$ is a positive integer.\n\nAs an example, consider different scenarios where the maximum of the response variable is $$n = 28$$. Note how it is possible to get distributions with different formats according to $$\\mu$$ and $$\\sigma$$ using rBB.\n\nset.seed(5)\n\nplot_dist <- function(mu0, sigma0) {\n\ntibble(days = rBB(n = 10^3, mu = mu0, sigma = sigma0, bd = 28)) %>%\ncount(days) %>%\nmutate(percent = n / sum(n)) %>%\nggplot(aes(days, percent)) +\ngeom_col(fill = \"#A02898\") +\nlabs(title = expr(mu==!!mu0~and~sigma==!!sigma0)) +\nscale_x_continuous(breaks = seq(0, 28, 4), limits = c(-1, 29))\n\n}\n\n(plot_dist(mu0 = .8, sigma0 = .1) + plot_dist(mu0 = .5, sigma0 = .5)) /\n(plot_dist(mu0 = .5, sigma0 = 2) + plot_dist(mu0 = .9, sigma0 = .2))",
null,
"## Zero Infated Beta Binomial (ZIBB)\n\nThe probabilities of the zero inflated beta binomial distribution can be described by\n\n$P(Y = y|n, \\mu, \\sigma, \\nu) = \\begin{cases} \\nu + (1 - \\nu)P(Y_1=0|n, \\mu, \\sigma) \\quad & \\text{ if } y = 0 \\\\ (1 - \\nu)P(Y_1=0|n, \\mu, \\sigma) \\quad & \\text{ if } y = 1, 2, 3, \\dots \\end{cases}$\n\nfor $$0 < \\mu < 1$$, $$\\sigma > 0$$, $$0 < \\nu < 1$$, $$n$$ is a positive integer and $$Y_1 \\sim \\text{BB}(n, \\mu, \\sigma)$$. For this ZIBB distribution, we have\n\n$\\text{E}(Y) = (1 - \\nu)n\\mu$\n\n$\\text{Var}(Y) = (1 - \\nu)n\\mu(1 - \\mu)\\left[1 + \\frac{\\sigma}{1 + \\sigma}(n-1) \\right] + \\nu(1 - \\nu)n^2\\mu^2$\n\nWe will now generate simulated data using the same parameters as the beta-binomial distribution (rBB) presented earlier, but with zero-inflation this time (rZIBB).\n\nset.seed(21)\n\nfig1 <- tibble(days = rBB(n = 10^3, mu =.3, sigma = .2, bd = 28)) %>%\ncount(days) %>%\nmutate(percent = n / sum(n)) %>%\nggplot(aes(days, percent)) +\ngeom_col(fill = \"#A02898\") +\nylim(c(0, .15)) +\nscale_x_continuous(breaks = seq(0, 30, 2)) +\nlabs(title = expression(paste(\"BB - \")~mu==.3~and~sigma==.2))\n\nfig2 <- tibble(days = rZIBB(n = 10^3, mu =.3, sigma = .2, nu = .1, bd = 28)) %>%\ncount(days) %>%\nmutate(percent = n / sum(n)) %>%\nggplot(aes(days, percent)) +\ngeom_col(fill = \"#A02898\") +\nylim(c(0, .15)) +\nscale_x_continuous(breaks = seq(0, 30, 2)) +\nlabs(title = expression(paste(\"ZIBB - \")~mu==.3~paste(\",\")~sigma==.2~and~nu==.1))\n\nfig1 / fig2",
null,
"As previously mentioned, the expected value is given by\n\n$\\text{E}(Y) = (1 - \\nu)n\\mu$\n\n(1 - 0.1)*28*.3\n 7.56\n\nFurthermore, it is important to note that $$P(Y = 0)$$ is not given by $$\\nu$$, but by\n\n$p_0 = \\nu + (1 - \\nu)P(Y_1=0|n, \\mu, \\sigma).$\n\n0.1 + (1 - 0.1)*dBB(0, mu =.3, sigma = .2, bd = 28)\n 0.1363325\n\nIn the next session, we will consider a hypothetical scenario with two groups.\n\n## Simulated scenario\n\nWe will be examining a scenario involving two groups, namely the control group and intervention group. For each group, the following parameters will be taken into consideration:\n\n• control: $$\\mu = .8$$, $$\\sigma = .1$$, $$\\nu = .13$$ and $$n = 28$$\n• intervention: $$\\mu = .5$$, $$\\sigma = .9$$, $$\\nu = .2$$ and $$n = 28$$\n\nIn this case, the expected values are given by:\n\n$\\text{E}(Y) = (1 - \\nu)n\\mu$\n\n(1 - .13) * 28 * .8 # control\n 19.488\n(1 - .20) * 28 * .5 # intervention\n 11.2\n\nAgain, $$P(Y = 0)$$ is not given by $$\\nu$$, but by\n\n$p_0 = \\nu + (1 - \\nu)P(Y_1=0|n, \\mu, \\sigma)$\n\n.13 + (1 - .13)*dBB(0, mu =.8, sigma = .1, bd = 28)\n 0.1300002\n.2 + (1 - .2)*dBB(0, mu =.5, sigma = .9, bd = 28)\n 0.2738362\n\n## Generating the simulated scenario\n\nIn order to generate the simulated data, we’ll use rZIBB.\n\nset.seed(31)\n\nn <- 10^3\n\ndf <- tibble(days = c(rZIBB(n, mu =.8, sigma = .1, nu = .13, bd = 28),\nrZIBB(n, mu =.5, sigma = .9, nu = .20, bd = 28)),\ngroup = rep(c(\"control\", \"intervention\"), each = n))\n\nThe graph below displays the proportion of observed values for each group.\n\ndf %>%\ncount(group, days) %>%\ngroup_by(group) %>%\nmutate(percent = n / sum(n)) %>%\nggplot(aes(days, percent)) +\ngeom_col(fill = \"#A02898\") +\nfacet_wrap(~ group, ncol = 1) +\nscale_x_continuous(breaks = seq(0, 28, 2))",
null,
"## Fitting GAMLSS\n\nfit <- gamlss(cbind(days, 28 - days) ~ group,\nsigma.formula = ~ group,\nnu.formula = ~ group,\ncontrol = gamlss.control(trace = FALSE),\ndata = df)\n\nsummary(fit)\n******************************************************************\nFamily: c(\"ZIBB\", \"Zero Inflated Beta Binomial\")\n\nCall:\ngamlss(formula = cbind(days, 28 - days) ~ group, sigma.formula = ~group,\nnu.formula = ~group, family = ZIBB(mu.link = \"logit\"),\ndata = df, control = gamlss.control(trace = FALSE))\n\nFitting method: RS()\n\n------------------------------------------------------------------\nMu Coefficients:\nEstimate Std. Error t value Pr(>|t|)\n(Intercept) 1.44200 0.02980 48.39 <2e-16 ***\ngroupintervention -1.46888 0.08063 -18.22 <2e-16 ***\n---\nSignif. codes: 0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1\n\n------------------------------------------------------------------\nSigma Coefficients:\nEstimate Std. Error t value Pr(>|t|)\n(Intercept) -2.36753 0.07053 -33.57 <2e-16 ***\ngroupintervention 2.30424 0.10408 22.14 <2e-16 ***\n---\nSignif. codes: 0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1\n\n------------------------------------------------------------------\nNu Coefficients:\nEstimate Std. Error t value Pr(>|t|)\n(Intercept) -1.81529 0.09114 -19.919 < 2e-16 ***\ngroupintervention 0.43528 0.16811 2.589 0.00969 **\n---\nSignif. codes: 0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1\n\n------------------------------------------------------------------\nNo. of observations in the fit: 2000\nDegrees of Freedom for the fit: 6\nResidual Deg. of Freedom: 1994\nat cycle: 10\n\nGlobal Deviance: 11217.28\nAIC: 11229.28\nSBC: 11262.89\n******************************************************************\n\nNext, we define the variables based on the estimates required to calculate the expected value.\n\nmu_ctrl <- inv_logit(fit$mu.coefficients[]) mu_int <- inv_logit(fit$mu.coefficients[] + fit$mu.coefficients[]) nu_ctrl <- inv_logit(fit$nu.coefficients[])\nnu_int <- inv_logit(fit$nu.coefficients[] + fit$nu.coefficients[])\n\nIn the following table, we present the sample mean, the estimated expected value using gamlss and the theoretical expected value. Note how similar these quantities are.\n\n# observed mean\ndf %>%\ngroup_by(group) %>%\nsummarise(sample_mean = mean(days)) %>%\nmutate(estimated_mean = c(mu_ctrl*28*(1 - nu_ctrl), mu_int*28*(1 - nu_int)),\ntheoretical_mean = c((1 - .13)*28*.8, (1 - .20)*28*.5))\n# A tibble: 2 × 4\ngroup sample_mean estimated_mean theoretical_mean\n<chr> <dbl> <dbl> <dbl>\n1 control 19.5 19.5 19.5\n2 intervention 11.0 11.0 11.2\n\nTo check the goodness-of-fit, it is possible to use the plot function.\n\nplot(fit)",
null,
"******************************************************************\nSummary of the Randomised Quantile Residuals\nmean = 0.001760414\nvariance = 0.9944081\ncoef. of skewness = 0.04925325\ncoef. of kurtosis = 3.042655\nFilliben correlation coefficient = 0.9996822\n******************************************************************\n\n## Bootstrap confidence intervals\n\nOne simple method to construct confidence intervals for the difference and ratio of means is by using the bootstrap techniques. In the following example, we can begin by creating an auxiliary function that performs the analysis on each bootstrap sample.\n\nboot_estimates <- function(df_star) {\n\nfit <- gamlss(cbind(days, 28 - days) ~ group,\nsigma.formula = ~ group,\nnu.formula = ~ group,\ncontrol = gamlss.control(trace = FALSE),\ndata = training(df_star))\n\nmu_ctrl <- inv_logit(fit$mu.coefficients[]) mu_int <- inv_logit(fit$mu.coefficients[] + fit$mu.coefficients[]) nu_ctrl <- inv_logit(fit$nu.coefficients[])\nnu_int <- inv_logit(fit$nu.coefficients[] + fit$nu.coefficients[])\n\nmean_ctrl <- mu_ctrl*28*(1 - nu_ctrl)\nmean_int <- mu_int*28*(1 - nu_int)\n\ntibble(outcome = c(\"difference\", \"ratio\"),\nvalue = c(mean_int - mean_ctrl, mean_int / mean_ctrl))\n\n}\n\nNext, we can generate the bootstrap samples and apply the previously created function to each sample. By adopting this approach, we can analyze the distribution of these statistics, perform statistical hypothesis tests, and create confidence intervals using percentiles or other techniques. For further information on the bootstrap and bootstrap confidence intervals, please refer to .\n\nboot_obs <- df %>%\nrsample::bootstraps(times = 10^3) %>%\nmutate(results = map(splits, boot_estimates)) %>%\nunnest(cols = results)\nboot_obs %>%\nggplot(aes(value, after_stat(density))) +\ngeom_histogram(fill = \"#A02898\", color = \"white\") +\nfacet_wrap(~ outcome, scales = \"free\", ncol = 1)",
null,
"boot_obs %>%\ngroup_by(outcome) %>%\nsummarise(perc_025 = quantile(value , .025),\nperc_975 = quantile(value , .975))\n# A tibble: 2 × 3\noutcome perc_025 perc_975\n<chr> <dbl> <dbl>\n1 difference -9.23 -7.59\n2 ratio 0.532 0.604\n\n## Estimation of percentiles through theoretical distribuition\n\nTo confirm the proximity between the percentiles obtained using bootstrap and the percentiles obtained through the theoretical distribution, we can utilize the following code:\n\nset.seed(5)\n\nrand_sample <- function(n) {\n\nctrl <- mean(rZIBB(n, mu =.8, sigma = .1, nu = .13, bd = 28))\nint <- mean(rZIBB(n, mu =.5, sigma = .9, nu = .20, bd = 28))\n\ntibble(outcome = c(\"difference\", \"ratio\"),\nvalue = c(int - ctrl, int / ctrl))\n}\n\ntibble(b = 1:10^3) %>%\nmutate(data = map(b, ~rand_sample(n = 10^3))) %>%\nunnest(data) %>%\ngroup_by(outcome) %>%\nsummarise(perc_025 = quantile(value , .025),\nperc_975 = quantile(value , .975))\n# A tibble: 2 × 3\noutcome perc_025 perc_975\n<chr> <dbl> <dbl>\n1 difference -9.16 -7.54\n2 ratio 0.536 0.608\n\nNote that the values obtained are remarkably similar to the bootstrap values derived from the previously generated single sample. However, further investigation is recommended in each scenario to verify this behavior.\n\n# Truncated distributions\n\nAs an illustration of a truncated function, we will use the gamma distribution.\n\n## Gamma distribution\n\nTo generate data from a gamma distribution, we can use the rGA function.\n\ndf <- tibble(days = rGA(n = 1000, mu = 10, sigma = .8))\n\ndf %>%\nggplot(aes(days, after_stat(density))) +\ngeom_histogram(color = \"white\", fill = \"#A02898\") +\ngeom_vline(xintercept = 15, linetype = 2,\ncolor = \"#2a9d8f\", linewidth = 1)",
null,
"Suppose we want to focus on the gamma distribution presented in the previous graph but only for values up to 15, i.e., the data falls within the interval $$(0, 15]$$. To achieve this, we can create a truncated distribution that specifies the distribution family, the truncation value, and whether it will be truncated on the left, right, or both sides. For instance, in this example, we can use the following settings:\n\ngen.trun(par = c(15), type = \"right\", family = GA(), name = \"trunc\")\nA truncated family of distributions from GA has been generated\nand saved under the names:\ndGAtrunc pGAtrunc qGAtrunc rGAtrunc GAtrunc\nThe type of truncation is right\nand the truncation parameter is 15 \n\nWe now have an rGAtrunc function to generate data from a range truncated by $$15$$. Let’s compare the usual distribution to the truncated distribution:\n\nset.seed(15)\n\n# GA\ndf <- tibble(days = rGA(n = 10^3, mu = 10, sigma = .8))\n\nfig1 <- df %>%\nggplot(aes(days, after_stat(density))) +\ngeom_histogram(color = \"white\", fill = \"#A02898\") +\nlabs(title = expression(paste(\"GA (\")~mu==.8~and~sigma==.8~paste(\")\"))) +\nscale_x_continuous(limits = c(-2, 70)) +\nscale_y_continuous(limits = c(0, .1))\n\n# GAtrunc\ndf <- tibble(days = rGAtrunc(n = 10^3, mu = 10, sigma = .8))\n\nfig2 <- df %>%\nggplot(aes(days, after_stat(density))) +\ngeom_histogram(color = \"white\", fill = \"#A02898\") +\nlabs(title = expression(paste(\"GAtrunc (\")~mu==.8~paste(\",\")~sigma==.8~paste(\"and truncated at 15)\"))) +\ngeom_vline(xintercept = 15, linetype = 2, color = \"#2a9d8f\", linewidth = 1) +\nscale_x_continuous(limits = c(-2, 70)) +\nscale_y_continuous(limits = c(0, .1))\n\nfig1 / fig2",
null,
"## Fitting GAtrunc\n\nNow we will fit a model considering the previously defined truncated distribution.\n\nfit_tr <- gamlss(days ~ 1, family = GAtrunc,\ncontrol = gamlss.control(trace = FALSE),\ndata = df)\n\nsummary(fit_tr)\n******************************************************************\nFamily: c(\"GAtrunc\", \"right truncated Gamma\")\n\nCall: gamlss(formula = days ~ 1, family = GAtrunc, data = df,\ncontrol = gamlss.control(trace = FALSE))\n\nFitting method: RS()\n\n------------------------------------------------------------------\nMu Coefficients:\nEstimate Std. Error t value Pr(>|t|)\n(Intercept) 2.39890 0.08297 28.91 <2e-16 ***\n---\nSignif. codes: 0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1\n\n------------------------------------------------------------------\nSigma Coefficients:\nEstimate Std. Error t value Pr(>|t|)\n(Intercept) -0.22320 0.02901 -7.695 3.39e-14 ***\n---\nSignif. codes: 0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1\n\n------------------------------------------------------------------\nNo. of observations in the fit: 1000\nDegrees of Freedom for the fit: 2\nResidual Deg. of Freedom: 998\nat cycle: 13\n\nGlobal Deviance: 5345.843\nAIC: 5349.843\nSBC: 5359.658\n******************************************************************\n\nWe can assess the model’s goodness of fit using the plot function. We can examine the symmetry of the residuals and ensure that the points on the graph align with the reference line.\n\nplot(fit_tr)",
null,
"******************************************************************\nSummary of the Quantile Residuals\nmean = -0.003691478\nvariance = 0.9857485\ncoef. of skewness = -0.05881383\ncoef. of kurtosis = 3.061488\nFilliben correlation coefficient = 0.9991239\n******************************************************************\n# mu teórico = 10\nexp(fit_tr$mu.coefficients) (Intercept) 11.01109 # sigma teórico = .8 exp(fit_tr$sigma.coefficients)\n(Intercept)\n0.7999561 \n\nNext, we will present fits using both the standard gamma distribution and the truncated gamma distribution.\n\nfit_ga <- gamlss(days ~ 1, family = GA,\ncontrol = gamlss.control(trace = FALSE),\ndata = df)\n\ndf %>%\nggplot(aes(days)) +\ngeom_histogram(aes(y = after_stat(density)), color = \"black\", fill = NA) +\nstat_function(aes(color = \"GAtrunc - estimation\"), linewidth = 1,\nfun = dGAtrunc, args = list(mu = exp(fit_tr$mu.coefficients), sigma = exp(fit_tr$sigma.coefficients))) +\nstat_function(aes(color = \"GAtrunc - theoretical\"), linewidth = 1,\nfun = dGAtrunc, args = list(mu = 10, sigma = .8)) +\nstat_function(aes(color = \"GA - estimation\"), linewidth = 1,\nfun = dGA, args = list(mu = exp(fit_ga$mu.coefficients), sigma = exp(fit_ga$sigma.coefficients))) +\nscale_color_manual(values = c(\"GAtrunc - estimation\" = \"blue\",\n\"GAtrunc - theoretical\" = \"red\",\n\"GA - estimation\" = \"#2a9d8f\")) +\nlabs(color = NULL, title = \"Adjusted with truncated GA\") +\ntheme(legend.position = \"top\")",
null,
""
] | [
null,
"https://tiagoms.com/posts/gamlss/index_files/figure-html/unnamed-chunk-2-1.png",
null,
"https://tiagoms.com/posts/gamlss/index_files/figure-html/unnamed-chunk-3-1.png",
null,
"https://tiagoms.com/posts/gamlss/index_files/figure-html/unnamed-chunk-9-1.png",
null,
"https://tiagoms.com/posts/gamlss/index_files/figure-html/unnamed-chunk-14-1.png",
null,
"https://tiagoms.com/posts/gamlss/index_files/figure-html/unnamed-chunk-17-1.png",
null,
"https://tiagoms.com/posts/gamlss/index_files/figure-html/unnamed-chunk-19-1.png",
null,
"https://tiagoms.com/posts/gamlss/index_files/figure-html/unnamed-chunk-21-1.png",
null,
"https://tiagoms.com/posts/gamlss/index_files/figure-html/unnamed-chunk-23-1.png",
null,
"https://tiagoms.com/posts/gamlss/index_files/figure-html/unnamed-chunk-25-1.png",
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.639519,"math_prob":0.99769485,"size":17552,"snap":"2023-40-2023-50","text_gpt3_token_len":5385,"char_repetition_ratio":0.1529519,"word_repetition_ratio":0.22085646,"special_character_ratio":0.4047402,"punctuation_ratio":0.19220056,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9997912,"pos_list":[0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18],"im_url_duplicate_count":[null,2,null,2,null,2,null,2,null,2,null,2,null,2,null,2,null,2,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2023-09-23T11:46:38Z\",\"WARC-Record-ID\":\"<urn:uuid:410bf860-1678-4d86-b38b-e88f02da30dc>\",\"Content-Length\":\"91362\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:0a71a0b1-2dd7-4c25-b902-41efdcc22d21>\",\"WARC-Concurrent-To\":\"<urn:uuid:4b32d06b-3361-48ac-99c3-d616b2fd7324>\",\"WARC-IP-Address\":\"54.84.236.175\",\"WARC-Target-URI\":\"https://tiagoms.com/posts/gamlss/\",\"WARC-Payload-Digest\":\"sha1:ZIP4CEFW63LZ4LTS67YUSVPMV6OPZOGJ\",\"WARC-Block-Digest\":\"sha1:LFETVXISJDZHYIJYT6A72EPHZ5QS6W2F\",\"WARC-Identified-Payload-Type\":\"application/xhtml+xml\",\"warc_filename\":\"/cc_download/warc_2023/CC-MAIN-2023-40/CC-MAIN-2023-40_segments_1695233506480.7_warc_CC-MAIN-20230923094750-20230923124750-00572.warc.gz\"}"} |
https://www.colorhexa.com/0d1019 | [
"# #0d1019 Color Information\n\nIn a RGB color space, hex #0d1019 is composed of 5.1% red, 6.3% green and 9.8% blue. Whereas in a CMYK color space, it is composed of 48% cyan, 36% magenta, 0% yellow and 90.2% black. It has a hue angle of 225 degrees, a saturation of 31.6% and a lightness of 7.5%. #0d1019 color hex could be obtained by blending #1a2032 with #000000. Closest websafe color is: #000000.\n\n• R 5\n• G 6\n• B 10\nRGB color chart\n• C 48\n• M 36\n• Y 0\n• K 90\nCMYK color chart\n\n#0d1019 color description : Very dark (mostly black) blue.\n\n# #0d1019 Color Conversion\n\nThe hexadecimal color #0d1019 has RGB values of R:13, G:16, B:25 and CMYK values of C:0.48, M:0.36, Y:0, K:0.9. Its decimal value is 856089.\n\nHex triplet RGB Decimal 0d1019 `#0d1019` 13, 16, 25 `rgb(13,16,25)` 5.1, 6.3, 9.8 `rgb(5.1%,6.3%,9.8%)` 48, 36, 0, 90 225°, 31.6, 7.5 `hsl(225,31.6%,7.5%)` 225°, 48, 9.8 000000 `#000000`\nCIE-LAB 4.754, 1.083, -6.009 0.527, 0.526, 0.993 0.257, 0.257, 0.526 4.754, 6.106, 280.221 4.754, -0.807, -3.269 7.255, 0.263, -3.041 00001101, 00010000, 00011001\n\n# Color Schemes with #0d1019\n\n• #0d1019\n``#0d1019` `rgb(13,16,25)``\n• #19160d\n``#19160d` `rgb(25,22,13)``\nComplementary Color\n• #0d1619\n``#0d1619` `rgb(13,22,25)``\n• #0d1019\n``#0d1019` `rgb(13,16,25)``\n• #100d19\n``#100d19` `rgb(16,13,25)``\nAnalogous Color\n• #16190d\n``#16190d` `rgb(22,25,13)``\n• #0d1019\n``#0d1019` `rgb(13,16,25)``\n• #19100d\n``#19100d` `rgb(25,16,13)``\nSplit Complementary Color\n• #10190d\n``#10190d` `rgb(16,25,13)``\n• #0d1019\n``#0d1019` `rgb(13,16,25)``\n• #190d10\n``#190d10` `rgb(25,13,16)``\n• #0d1916\n``#0d1916` `rgb(13,25,22)``\n• #0d1019\n``#0d1019` `rgb(13,16,25)``\n• #190d10\n``#190d10` `rgb(25,13,16)``\n• #19160d\n``#19160d` `rgb(25,22,13)``\n• #000000\n``#000000` `rgb(0,0,0)``\n• #000000\n``#000000` `rgb(0,0,0)``\n• #040508\n``#040508` `rgb(4,5,8)``\n• #0d1019\n``#0d1019` `rgb(13,16,25)``\n• #161b2a\n``#161b2a` `rgb(22,27,42)``\n• #1e253b\n``#1e253b` `rgb(30,37,59)``\n• #27304b\n``#27304b` `rgb(39,48,75)``\nMonochromatic Color\n\n# Alternatives to #0d1019\n\nBelow, you can see some colors close to #0d1019. Having a set of related colors can be useful if you need an inspirational alternative to your original color choice.\n\n• #0d1319\n``#0d1319` `rgb(13,19,25)``\n• #0d1219\n``#0d1219` `rgb(13,18,25)``\n• #0d1119\n``#0d1119` `rgb(13,17,25)``\n• #0d1019\n``#0d1019` `rgb(13,16,25)``\n• #0d0f19\n``#0d0f19` `rgb(13,15,25)``\n• #0d0e19\n``#0d0e19` `rgb(13,14,25)``\n• #0d0d19\n``#0d0d19` `rgb(13,13,25)``\nSimilar Colors\n\n# #0d1019 Preview\n\nThis text has a font color of #0d1019.\n\n``<span style=\"color:#0d1019;\">Text here</span>``\n#0d1019 background color\n\nThis paragraph has a background color of #0d1019.\n\n``<p style=\"background-color:#0d1019;\">Content here</p>``\n#0d1019 border color\n\nThis element has a border color of #0d1019.\n\n``<div style=\"border:1px solid #0d1019;\">Content here</div>``\nCSS codes\n``.text {color:#0d1019;}``\n``.background {background-color:#0d1019;}``\n``.border {border:1px solid #0d1019;}``\n\n# Shades and Tints of #0d1019\n\nA shade is achieved by adding black to any pure hue, while a tint is created by mixing white to any pure color. In this example, #06080c is the darkest color, while #fefeff is the lightest one.\n\n• #06080c\n``#06080c` `rgb(6,8,12)``\n• #0d1019\n``#0d1019` `rgb(13,16,25)``\n• #141826\n``#141826` `rgb(20,24,38)``\n• #1a2133\n``#1a2133` `rgb(26,33,51)``\n• #212940\n``#212940` `rgb(33,41,64)``\n• #28314d\n``#28314d` `rgb(40,49,77)``\n• #2f395a\n``#2f395a` `rgb(47,57,90)``\n• #354266\n``#354266` `rgb(53,66,102)``\n• #3c4a73\n``#3c4a73` `rgb(60,74,115)``\n• #435280\n``#435280` `rgb(67,82,128)``\n• #495a8d\n``#495a8d` `rgb(73,90,141)``\n• #50639a\n``#50639a` `rgb(80,99,154)``\n• #576ba7\n``#576ba7` `rgb(87,107,167)``\n• #6376ae\n``#6376ae` `rgb(99,118,174)``\n• #7081b5\n``#7081b5` `rgb(112,129,181)``\n• #7d8dbb\n``#7d8dbb` `rgb(125,141,187)``\n• #8a98c2\n``#8a98c2` `rgb(138,152,194)``\n• #97a3c9\n``#97a3c9` `rgb(151,163,201)``\n• #a4afd0\n``#a4afd0` `rgb(164,175,208)``\n``#b1bad6` `rgb(177,186,214)``\n• #bec6dd\n``#bec6dd` `rgb(190,198,221)``\n• #cbd1e4\n``#cbd1e4` `rgb(203,209,228)``\n• #d7dcea\n``#d7dcea` `rgb(215,220,234)``\n• #e4e8f1\n``#e4e8f1` `rgb(228,232,241)``\n• #f1f3f8\n``#f1f3f8` `rgb(241,243,248)``\n• #fefeff\n``#fefeff` `rgb(254,254,255)``\nTint Color Variation\n\n# Tones of #0d1019\n\nA tone is produced by adding gray to any pure hue. In this case, #131313 is the less saturated color, while #010a25 is the most saturated one.\n\n• #131313\n``#131313` `rgb(19,19,19)``\n• #111215\n``#111215` `rgb(17,18,21)``\n• #101116\n``#101116` `rgb(16,17,22)``\n• #0e1118\n``#0e1118` `rgb(14,17,24)``\n• #0d1019\n``#0d1019` `rgb(13,16,25)``\n• #0c0f1a\n``#0c0f1a` `rgb(12,15,26)``\n• #0a0f1c\n``#0a0f1c` `rgb(10,15,28)``\n• #090e1d\n``#090e1d` `rgb(9,14,29)``\n• #070d1f\n``#070d1f` `rgb(7,13,31)``\n• #060c20\n``#060c20` `rgb(6,12,32)``\n• #040c22\n``#040c22` `rgb(4,12,34)``\n• #030b23\n``#030b23` `rgb(3,11,35)``\n• #010a25\n``#010a25` `rgb(1,10,37)``\nTone Color Variation\n\n# Color Blindness Simulator\n\nBelow, you can see how #0d1019 is perceived by people affected by a color vision deficiency. This can be useful if you need to ensure your color combinations are accessible to color-blind users.\n\nMonochromacy\n• Achromatopsia 0.005% of the population\n• Atypical Achromatopsia 0.001% of the population\nDichromacy\n• Protanopia 1% of men\n• Deuteranopia 1% of men\n• Tritanopia 0.001% of the population\nTrichromacy\n• Protanomaly 1% of men, 0.01% of women\n• Deuteranomaly 6% of men, 0.4% of women\n• Tritanomaly 0.01% of the population"
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.53588223,"math_prob":0.76686215,"size":3649,"snap":"2023-40-2023-50","text_gpt3_token_len":1680,"char_repetition_ratio":0.12620027,"word_repetition_ratio":0.011049724,"special_character_ratio":0.563168,"punctuation_ratio":0.23318386,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9899549,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2023-09-26T12:20:53Z\",\"WARC-Record-ID\":\"<urn:uuid:6961355b-dda4-4f2d-bf67-9acb8167239a>\",\"Content-Length\":\"36129\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:e580d584-4578-4469-bbd6-0e9c380c868c>\",\"WARC-Concurrent-To\":\"<urn:uuid:2c31b143-9448-499d-8bed-c7312309ec92>\",\"WARC-IP-Address\":\"178.32.117.56\",\"WARC-Target-URI\":\"https://www.colorhexa.com/0d1019\",\"WARC-Payload-Digest\":\"sha1:S46JLHVTIJQVZPTPMY3TWIKCLDEQCU3C\",\"WARC-Block-Digest\":\"sha1:RVDOKK7HOVGJEPPFEVVVW5OCIMH2SI5V\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2023/CC-MAIN-2023-40/CC-MAIN-2023-40_segments_1695233510208.72_warc_CC-MAIN-20230926111439-20230926141439-00645.warc.gz\"}"} |
https://mathoverflow.net/questions/349352/subgradient-in-a-predual-under-weak-continuity/414752 | [
"# Subgradient in a predual under weak* continuity\n\nLet $$X$$ be a Banach space. Suppose $$f:X^*\\to\\mathbb R\\cup\\{\\infty\\}$$ is convex, has weak*-compact effective domain, and is weak*-continuous on its effective domain. In particular, $$f$$ is weak*-lower semicontinuous on $$X^*$$.\n\nSuppose I know $$f$$ is subdifferentiable at $$x^*\\in \\text{dom}(f)$$, i.e. the subdifferential $$\\partial f(x^*)\\subseteq X^{**}$$ is nonempty. Does this necessarily imply that $$X\\cap \\partial f(x^*)$$ is nonempty? If not, are there known sufficient conditions for $$X\\cap \\partial f(x^*)$$ to be nonempty?\n\n• If $Y$ is a non-reflexive Banach space and $X = Y^*$, then the unit ball $B_Y$ of $Y$ is closed, bounded and convex, but not weak*-closed in $X^* = Y^{**}$ (due to Goldstine theorem). Thus, your first parenthesis might fail and, similarly, $f$ might fail to be weak*-lower semicontinuous.\n– gerw\nSep 30, 2021 at 8:30\n• Whoops, that's embarrassing. Thank you! I'm now amending the question to not have this error. Oct 1, 2021 at 9:59\n\nFinally, I was able to cook up a counterexample. We choose $$X = c_0$$ (zero sequences equipped with supremum norm). Thus, the dual spaces are (isometric to) $$X^* = \\ell^1$$ and $$X^{**} = \\ell^\\infty$$.\nWe define $$C := \\{ x \\in \\ell^1 \\mid \\forall n \\in \\mathbb N : |x_n| \\le 1/n^2 \\}$$ and $$f \\colon \\ell^1 \\to \\mathbb R \\cup \\{\\infty\\}$$ via $$f(x) = \\sum_{n=1}^\\infty x_n \\in \\mathbb R$$ for all $$x \\in C$$ and $$f(x) = \\infty$$ for all $$x \\in \\ell^1 \\setminus C$$.\nLet us check, that the assumptions are satisfied. The set $$C$$ is bounded due to $$\\sum_{n = 1}^\\infty 1/n^2 < \\infty$$ and weak-$$\\star$$ closed since it is the intersection of the weak-$$\\star$$ closed \"stripes\" $$\\{x \\in \\ell^1 \\mid |x_n| \\le 1/n^2\\} \\qquad\\forall n \\in \\mathbb N.$$ Thus, it is weak-$$\\star$$ compact. The function $$f$$ is convex and it remains to check weak-$$\\star$$ continuity on $$C$$. Let $$x_0 \\in C$$ be given and consider a net $$(x_i)_{i\\in I} \\subset C$$ with $$x_i \\to x_0$$. For an arbitrary $$\\varepsilon > 0$$, there is $$N \\in \\mathbb N$$ with $$\\sum_{n = N+1}^\\infty 1/n^2 < \\varepsilon$$. Next, there is $$i \\in I$$ with $$\\left| \\sum_{n = 1}^N (x_{j,n} - x_{0,n}) \\right| < \\varepsilon \\qquad\\forall j \\ge i$$ since $$y \\mapsto \\sum_{n = 1}^N y_n$$ is weak-$$\\star$$ continuous. Thus, $$|f(x_j) - f(x_0)| \\le \\left| \\sum_{n = 1}^N (x_{j,n} - x_{0,n}) \\right| + \\sum_{n = N+1}^\\infty |x_{j,n}| + \\sum_{n = N+1}^\\infty |x_{0,n}| < 3 \\varepsilon \\qquad\\forall j \\ge i.$$ Since $$\\varepsilon > 0$$ was arbitrary, this shows weak-$$\\star$$ continuity on $$C$$.\nFinally, it is easy to check that $$\\partial f(0) = \\{1\\}$$, but $$1 \\in \\ell^\\infty \\setminus c_0$$."
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.68865085,"math_prob":1.0000081,"size":1621,"snap":"2023-40-2023-50","text_gpt3_token_len":672,"char_repetition_ratio":0.13110699,"word_repetition_ratio":0.028571429,"special_character_ratio":0.42072794,"punctuation_ratio":0.09248555,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":1.0000097,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2023-12-02T07:43:06Z\",\"WARC-Record-ID\":\"<urn:uuid:8ba1e2a2-9090-4332-a02e-502e0c6684f9>\",\"Content-Length\":\"110551\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:7097fb2a-1449-4be7-a95a-6470f5443eb2>\",\"WARC-Concurrent-To\":\"<urn:uuid:0b66b3a8-1579-4bbe-be81-b2828a52e77f>\",\"WARC-IP-Address\":\"104.18.37.74\",\"WARC-Target-URI\":\"https://mathoverflow.net/questions/349352/subgradient-in-a-predual-under-weak-continuity/414752\",\"WARC-Payload-Digest\":\"sha1:DS3KRCQ2WVKUL46O2H6R2Q36SFIQYZ27\",\"WARC-Block-Digest\":\"sha1:F54W6SEKJTDLYQNDWJ7UK6DDLIK5CVUZ\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2023/CC-MAIN-2023-50/CC-MAIN-2023-50_segments_1700679100381.14_warc_CC-MAIN-20231202073445-20231202103445-00714.warc.gz\"}"} |
https://subtract.info/average-natural-numbers/what-is-the-average-of-the-first-52-natural-numbers.html | [
"The average of the first 52 natural numbers",
null,
"Here we will define and show you the formula and the math to calculate the average of the first 52 natural numbers.\n\nThe first 52 natural numbers are the whole numbers (integers) that start with 1 and end with 52. To make a list of the first 52 natural numbers, you simply count up to 52.\n\nTo get the average of those 52 numbers, you add them up and then divide the sum by 52. We created a formula that can calculate the average of any sequence of natural numbers starting with 1. Here is the formula to calculate the average (avg) of the first n natural numbers:\n\navg = ((n × (n + 1)) ÷ 2) ÷ n\n\nWhen we enter n = 52 in our formula, we get the average of the first 52 natural numbers. Here is the math and the answer:\n\navg = ((n × (n + 1)) ÷ 2) ÷ n\navg = ((52 × (52 + 1)) ÷ 2) ÷ 52\navg = ((52 × 53) ÷ 2) ÷ 52\navg = (2756 ÷ 2) ÷ 52\navg = 1378 ÷ 52\naverage = 26.5\n\nAverage of the First Natural Numbers Calculator\nDo you need the average of another number of first natural numbers? Please enter your number here.\n\nWhat is the average of the first 53 natural numbers?\nHere is a similar math problem that we have answered for you."
] | [
null,
"https://subtract.info/image/average-of-first-natural-numbers.png",
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.88314134,"math_prob":0.99979,"size":1212,"snap":"2022-40-2023-06","text_gpt3_token_len":342,"char_repetition_ratio":0.2160596,"word_repetition_ratio":0.13253012,"special_character_ratio":0.31683168,"punctuation_ratio":0.066390045,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9998772,"pos_list":[0,1,2],"im_url_duplicate_count":[null,null,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2023-01-28T23:23:37Z\",\"WARC-Record-ID\":\"<urn:uuid:34d2a8fd-05da-410d-8262-8552d3cc4be5>\",\"Content-Length\":\"6168\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:c9b9fc4c-6b55-4f40-a811-752f02e0b5d1>\",\"WARC-Concurrent-To\":\"<urn:uuid:b86f59ef-446c-4081-beaf-e67b78723060>\",\"WARC-IP-Address\":\"18.165.98.28\",\"WARC-Target-URI\":\"https://subtract.info/average-natural-numbers/what-is-the-average-of-the-first-52-natural-numbers.html\",\"WARC-Payload-Digest\":\"sha1:A3KZJYPV4LKO63LAMJT5AA7ESAG4YFET\",\"WARC-Block-Digest\":\"sha1:F34XCR5WLXGKJMQEMY3Z42YIGB7O3P4O\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2023/CC-MAIN-2023-06/CC-MAIN-2023-06_segments_1674764499695.59_warc_CC-MAIN-20230128220716-20230129010716-00730.warc.gz\"}"} |
https://convertoctopus.com/42-2-inches-to-kilometers | [
"## Conversion formula\n\nThe conversion factor from inches to kilometers is 2.54E-5, which means that 1 inch is equal to 2.54E-5 kilometers:\n\n1 in = 2.54E-5 km\n\nTo convert 42.2 inches into kilometers we have to multiply 42.2 by the conversion factor in order to get the length amount from inches to kilometers. We can also form a simple proportion to calculate the result:\n\n1 in → 2.54E-5 km\n\n42.2 in → L(km)\n\nSolve the above proportion to obtain the length L in kilometers:\n\nL(km) = 42.2 in × 2.54E-5 km\n\nL(km) = 0.00107188 km\n\nThe final result is:\n\n42.2 in → 0.00107188 km\n\nWe conclude that 42.2 inches is equivalent to 0.00107188 kilometers:\n\n42.2 inches = 0.00107188 kilometers",
null,
"## Alternative conversion\n\nWe can also convert by utilizing the inverse value of the conversion factor. In this case 1 kilometer is equal to 932.9402545061 × 42.2 inches.\n\nAnother way is saying that 42.2 inches is equal to 1 ÷ 932.9402545061 kilometers.\n\n## Approximate result\n\nFor practical purposes we can round our final result to an approximate numerical value. We can say that forty-two point two inches is approximately zero point zero zero one kilometers:\n\n42.2 in ≅ 0.001 km\n\nAn alternative is also that one kilometer is approximately nine hundred thirty-two point nine four times forty-two point two inches.\n\n## Conversion table\n\n### inches to kilometers chart\n\nFor quick reference purposes, below is the conversion table you can use to convert from inches to kilometers\n\ninches (in) kilometers (km)\n43.2 inches 0.001 kilometers\n44.2 inches 0.001 kilometers\n45.2 inches 0.001 kilometers\n46.2 inches 0.001 kilometers\n47.2 inches 0.001 kilometers\n48.2 inches 0.001 kilometers\n49.2 inches 0.001 kilometers\n50.2 inches 0.001 kilometers\n51.2 inches 0.001 kilometers\n52.2 inches 0.001 kilometers"
] | [
null,
"https://convertoctopus.com/images/42-2-inches-to-kilometers",
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.79492277,"math_prob":0.99625665,"size":1777,"snap":"2020-24-2020-29","text_gpt3_token_len":495,"char_repetition_ratio":0.25437114,"word_repetition_ratio":0.0,"special_character_ratio":0.32751828,"punctuation_ratio":0.14583333,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.99395764,"pos_list":[0,1,2],"im_url_duplicate_count":[null,2,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2020-07-02T11:54:10Z\",\"WARC-Record-ID\":\"<urn:uuid:ddaa64d2-bf03-4452-9aff-85d4b2465fce>\",\"Content-Length\":\"31380\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:7866c5c7-c415-49ad-bbc2-1156917e6fea>\",\"WARC-Concurrent-To\":\"<urn:uuid:6f658946-2547-414e-997f-b675678f99d7>\",\"WARC-IP-Address\":\"104.27.142.66\",\"WARC-Target-URI\":\"https://convertoctopus.com/42-2-inches-to-kilometers\",\"WARC-Payload-Digest\":\"sha1:WVWHNUQ3UMBEIC2SOUYODXVDAUHZMG6G\",\"WARC-Block-Digest\":\"sha1:GD2KTSXREEPNZ4S4YBH25INQP7F4KHK7\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2020/CC-MAIN-2020-29/CC-MAIN-2020-29_segments_1593655878753.12_warc_CC-MAIN-20200702111512-20200702141512-00434.warc.gz\"}"} |
https://www.thoughtco.com/exponents-and-bases-2312002 | [
"# Exponents and Bases\n\nIdentifying the exponent and its base is the prerequisite for simplifying expressions with exponents, but first, it's important to define the terms: an exponent is the number of times that a number is multiplied by itself and the base is the number that is being multiplied by itself in the amount expressed by the exponent.\n\nTo simplify this explanation, the basic format of an exponent and base can be written bwherein n is the exponent or number of times that base is multiplied by itself and b is the base is the number being multiplied by itself. The exponent, in mathematics, is always written in superscript to denote that it is the number of times the number it's attached to is multiplied by itself.\n\nThis is especially useful in business for calculating the amount that is produced or used over time by a company wherein the amount produced or consumed is always (or nearly always) the same from hour to hour, day to day, or year to year. In cases like these, businesses can apply the exponential growth or exponential decay formulas in order to better assess future outcomes.\n\n## Everyday Usage and Application of Exponents\n\nAlthough you don't often run across the need to multiply a number by itself a certain amount of times, there are many everyday exponents, especially in units of measurement like square and cubic feet and inches, which technically mean \"one foot multiplied by one foot.\"\n\nExponents are also extremely useful in denoting extremely large or small quantities and measurements like nanometers, which is 10-9 meters, which can also be written as a decimal point followed by eight zeros, then a one (.000000001). Mostly, though, average people don't use exponents except when it comes to careers in finance, computer engineering and programming, science, and accounting.\n\nExponential growth in itself is a critically important aspect of not only the stock market world but also of biological functions, resource acquisition, electronic computations, and demographics research while exponential decay is commonly used in sound and lighting design, radioactive waste and other dangerous chemicals, and ecological research involving decreasing populations.\n\n## Exponents in Finances, Marketing, and Sales\n\nExponents are especially important in calculating compound interest because the amount of money that is earned and compounded depends on the exponent of time. In other words, interest accrues in such a way that each time it is compounded, the total interest increases exponentially.\n\nRetirement funds, long-term investments, property ownership, and even credit card debt all rely on this compound interest equation to define how much money is made (or lost/owed) over a certain amount of time.\n\nSimilarly, trends in sales and marketing tend to follow exponential patterns. Take for instance the smartphone boom that started somewhere around 2008: At first, very few people had smartphones, but over the course of the next five years, the number of people who purchased them annually increased exponentially.\n\n## Using Exponents in Calculating Population Growth\n\nPopulation increase also works in this way because populations are expected to be able to produce a consistent number more offspring each generation, meaning we can develop an equation for predicting their growth over a certain amount of generations:\n\nc = (2n)2\n\nIn this equation, c represents the total number of children had after a certain number of generations, represented by n, which assumes that each parent couple can produce four offspring. The first generation, therefore, would have four children because two multiplied by one equals two, which would then be multiplied by the power of the exponent (2), equalling four. By the fourth generation, the population would be increased by 216 children.\n\nIn order to calculate this growth as a total, one would then have to plug the number of children (c) into an equation that also adds in the parents each generation: p = (2n-1)2 + c + 2. In this equation, the total population (p) is determined by the generation (n) and the total number of children added that generation (c).\n\nThe first part of this new equation simply adds the number of offspring produced by each generation before it (by first reducing the generation number by one), meaning it adds the parents' total to the total number of offspring produced (c) before adding in the first two parents that started the population.\n\n## Try Identifying Exponents Yourself!\n\nUse the equations presented in Section 1 below to test your ability to identify the base and exponent of each problem, then check your answers in Section 2, and review how these equations function in the final Section 3.\n\n01\nof 03\n\n## Exponent and Base Practice\n\nIdentify each exponent and base:\n\n1. 34\n\n2. x4\n\n3. 7y3\n\n4. (x + 5)5\n\n5. 6x/11\n\n6. (5e)y+3\n\n7. (x/y)16\n\n02\nof 03\n\n1. 34\nexponent: 4\nbase: 3\n\n2. x4\nexponent: 4\nbase: x\n\n3. 7y3\nexponent: 3\nbase: y\n\n4. (x + 5)5\nexponent: 5\nbase: (x + 5)\n\n5. 6x/11\nexponent: x\nbase: 6\n\n6. (5e)y+3\nexponent: y + 3\nbase: 5e\n\n7. (x/y)16\nexponent: 16\nbase: (x/y)\n\n03\nof 03\n\n## Explaining the Answers and Solving the Equations\n\nIt's important to remember the order of operations, even in simply identifying bases and exponents, which states that equations are solved in the following order: parenthesis, exponents and roots, multiplication and division, then addition and subtraction.\n\nBecause of this, bases and exponents in the above equations would simplify to the answers presented in Section 2. Take note of question 3: 7y3 is like saying 7 times y3. After y is cubed, then you multiply by 7. The variable y, not 7, is being raised to the third power.\n\nIn question 6, on the other hand, the entire phrase in the parenthesis is written as the base and everything in the superscript position is written as the exponent (superscript text can be regarded as being in parenthesis in mathematical equations such as these).\n\nFormat\nmla apa chicago"
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.934445,"math_prob":0.9732043,"size":6878,"snap":"2021-43-2021-49","text_gpt3_token_len":1517,"char_repetition_ratio":0.14183882,"word_repetition_ratio":0.012927054,"special_character_ratio":0.2172143,"punctuation_ratio":0.12578125,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9973993,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2021-10-23T16:58:54Z\",\"WARC-Record-ID\":\"<urn:uuid:7340966f-c60a-4245-b034-c33e4fdafe3f>\",\"Content-Length\":\"125522\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:1e76c264-dc78-47b8-911f-a580d49e421a>\",\"WARC-Concurrent-To\":\"<urn:uuid:aba342ec-3216-440d-932e-f7b77e7d8e4b>\",\"WARC-IP-Address\":\"199.232.130.137\",\"WARC-Target-URI\":\"https://www.thoughtco.com/exponents-and-bases-2312002\",\"WARC-Payload-Digest\":\"sha1:ECD6GXOZOH4JXEIBBXMEV6CSYLJTUPTI\",\"WARC-Block-Digest\":\"sha1:RQF3RDHABRJJV2EG2RXDB5VDI2UZKFBN\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2021/CC-MAIN-2021-43/CC-MAIN-2021-43_segments_1634323585737.45_warc_CC-MAIN-20211023162040-20211023192040-00456.warc.gz\"}"} |
https://electronics.stackexchange.com/questions/393062/how-do-i-calculate-the-unknowns-of-the-current-equation-for-a-rlc-series-circuit | [
"How do I calculate the unknowns of the current equation for a RLC series circuit?\n\nSuppose I was dealing with the following voltage equation for the RLC series circuit:\n\n$v(t) = Ae^{m_1t} + Be^{m_2t} + V_s$\n\nTo know the values of A and B I would do the two initial conditions:\n\n1. voltage at t=0 (I would solve the equation for t=0)\n2. dv/dt at t=0 (I would derivate the equation and solve for t=0)\n\nNow suppose that I want to do the particular conditions for the current case to discover A and B.\n\n$i(t) = Ae^{m_1t} + Be^{m_2t}$\n\nWhat should I do? I suppose the conditions are the same, so, if I have the current equation, I have to integrate that to get voltage's but doing so, I will generate a constant of integration that will be a third unknown (I suppose it will be V0).\n\nThe whole thing is sounding a little strange.\n\nIn resume: I give you the i(t) equation of a series RLC circuit in the form\n\n$i(t) = Ae^{m_1t} + Be^{m_2t}$\n\nHow do you get, for example, the values of A and B in the form of variables, I mean in terms of formula that can be used for any case?\n\nHow is that really solved?\n\n• A is current at t = 0 and B is di/dt at t = 0. – Andy aka Aug 28 '18 at 11:39\n• thanks. What parameter is di/dt in terms of circuit? It must be something from the real world. I mean, dv/dt = i/c, but what about di/dt? – SpaceDog Aug 28 '18 at 11:41\n• ah, I see, di/dt = V/L, right? – SpaceDog Aug 28 '18 at 11:46\n• Yes because at t = 0 the inductor has the highest impedance and therefore it dictates the initial rate of change of current as per V = L di/dt because R, L and C are in series. – Andy aka Aug 28 '18 at 11:56\n• Did you really mean to have the same exponents ($e^{m_1t}$)? If so, the A and B terms cannot be separated. – Chu Aug 28 '18 at 13:50\n\n$$V = L\\dfrac{di}{dt}$$"
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.9397096,"math_prob":0.9944647,"size":1013,"snap":"2019-43-2019-47","text_gpt3_token_len":289,"char_repetition_ratio":0.12091179,"word_repetition_ratio":0.05050505,"special_character_ratio":0.29022706,"punctuation_ratio":0.07339449,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.99990475,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2019-10-17T05:36:20Z\",\"WARC-Record-ID\":\"<urn:uuid:3756d736-5ff4-405e-bcbe-e922778e8c7c>\",\"Content-Length\":\"144158\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:3017049d-f8ec-483f-ad73-1b116cd7265b>\",\"WARC-Concurrent-To\":\"<urn:uuid:bf8e4a2a-532a-45b7-9c21-300fd0f481cb>\",\"WARC-IP-Address\":\"151.101.129.69\",\"WARC-Target-URI\":\"https://electronics.stackexchange.com/questions/393062/how-do-i-calculate-the-unknowns-of-the-current-equation-for-a-rlc-series-circuit\",\"WARC-Payload-Digest\":\"sha1:JLHMM2A3U2NYCZVKOYZORESVSFON7RBY\",\"WARC-Block-Digest\":\"sha1:J2QSKKUQ2XGCOWEVU6ZTAGFUYEI277EN\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2019/CC-MAIN-2019-43/CC-MAIN-2019-43_segments_1570986672723.50_warc_CC-MAIN-20191017045957-20191017073457-00080.warc.gz\"}"} |
https://www.tutorialspoint.com/program-to-find-number-of-elements-in-all-permutation-which-are-following-given-conditions-in-python | [
"# Program to find number of elements in all permutation which are following given conditions in Python\n\nPythonServer Side ProgrammingProgramming\n\n#### Beyond Basic Programming - Intermediate Python\n\nMost Popular\n\n36 Lectures 3 hours\n\n#### Practical Machine Learning using Python\n\nBest Seller\n\n91 Lectures 23.5 hours\n\n#### Practical Data Science using Python\n\n22 Lectures 6 hours\n\nSuppose we have a set A where all elements from 1 to n are present. And P(A) represents all permutations of elements present in A. We have to find number of elements in P(A) which satisfies the given conditions\n\n• For all i in range [1, n], A[i] is not same as i\n• There exists a set of k indices {i1, i2, ... ik} such that A[ij] = ij+1 for all j < k and A[ik] = i1 (cyclic).\n\nSo, if the input is like n = 3 k = 2, then the output will be 0 because -\n\nConsider the Array's are 1 indexed. As N = 3 and K = 2, we can find 2 sets of A that satisfy the first property a[i] ≠ i, they are [3,1,2] and [2,3,1]. Now as K = 2, we can have 6 such elements.\n\n[1,2], [1,3],[2,3], [2,1], [3,1], [3,2]. Now if we consider the first element of\n\nP(A) -> [3,1,2]\n\n• [1,2], A ≠ 2\n• [1,3], A = 3 but A ≠ 1\n• [2,3], A ≠ 3\n• [2,1], A = 1 but A ≠ 2\n• [3,1], A = 1 but A ≠ 3\n• [3,2], A ≠ 2\n\nP(A) -> [2,3,1]\n\n• [1,2], A = 2 but A ≠ 1\n• [1,3], A ≠ 3\n• [2,3], A = 3 but A ≠ 3\n• [2,1], A ≠ 1\n• [3,1], A = but A ≠ 3\n• [3,2], A ≠ 2\n\nAs none of the elements of a satisfy the properties above, hence 0.\n\nTo solve this, we will follow these steps −\n\n• ps := all permutations of arrays with elements in range [1, n]\n• c := 0\n• for each p in ps, do\n• for each index i and value a in p, do\n• if a is same as i, then\n• come out from the loop\n• otherwise,\n• for j in range 0 to n - 1, do\n• current := p[j]\n• cycle_length := 1\n• while current is not same as j, do\n• current := p[current]\n• cycle_length := cycle_length + 1\n• if cycle_length is same as k, then\n• c := c + 1\n• come out from the loop\n• return c\n\n## Example\n\nLet us see the following implementation to get better understanding −\n\nimport itertools\n\ndef solve(n, k):\nps = itertools.permutations(range(n), n)\nc = 0\nfor p in ps:\nfor i, a in enumerate(p):\nif a == i:\nbreak\nelse:\nfor j in range(n):\ncurrent = p[j]\ncycle_length = 1\nwhile current != j:\ncurrent = p[current]\ncycle_length += 1\nif cycle_length == k:\nc += 1\nbreak\nreturn c\n\nn = 3\nk = 2\nprint(solve(n, k))\n\n## Input\n\n3, 2\n\n\n## Output\n\n0"
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.83565,"math_prob":0.99865085,"size":4027,"snap":"2022-40-2023-06","text_gpt3_token_len":1240,"char_repetition_ratio":0.1409396,"word_repetition_ratio":0.104819275,"special_character_ratio":0.3315123,"punctuation_ratio":0.115340255,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9989767,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2022-10-06T02:12:33Z\",\"WARC-Record-ID\":\"<urn:uuid:c5e546d1-b661-47c9-932a-5b80e1e81304>\",\"Content-Length\":\"39122\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:f32295b0-33d6-4ea9-87b4-ee72c5cb2b04>\",\"WARC-Concurrent-To\":\"<urn:uuid:3011fda0-b981-43ea-a6f2-84620f8351b0>\",\"WARC-IP-Address\":\"192.229.210.176\",\"WARC-Target-URI\":\"https://www.tutorialspoint.com/program-to-find-number-of-elements-in-all-permutation-which-are-following-given-conditions-in-python\",\"WARC-Payload-Digest\":\"sha1:63IXKN2S67DX3BTCNUW3JSCEJK7C33BT\",\"WARC-Block-Digest\":\"sha1:XQVCYHSINRQG4WZIAINFAFPZV6DVVPNN\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2022/CC-MAIN-2022-40/CC-MAIN-2022-40_segments_1664030337680.35_warc_CC-MAIN-20221005234659-20221006024659-00608.warc.gz\"}"} |
https://stats.stackexchange.com/questions/475693/understanding-the-bootstrap-method-in-introduction-to-statistical-learning | [
"# Understanding the Bootstrap method in *Introduction to Statistical Learning*\n\nI am having a hard time understanding Bootstrap method. In the book Introduction to Statistical Learning (pp. 187-190) the Bootstrap method is explained by first using \"simulated datasets\" from an \"original population\" to estimate $$\\alpha$$. But this approach does not seem to be applicable in practical scenarios, so we use Bootstrap samples instead. The book says that Bootstrap samples are taken from the \"original data set\".\n\nI really don't understand these terms mean. Could someone please explain to me in simple words what those pages mean by these terms, and hence, what does this mean about how the Bootstrap method works?\n\nBootstrapping is introduced as a method to estimate the variance of a statistics $$S$$, given a sample $$X=\\{X_1, X_2, \\ldots, X_2\\}$$.\n\nUsually, you can have two different scenarios. One scenario is when you know the analytical expression of the distribution of $$S$$. One when you cannot infer the distribution of $$S$$. In the first case, you can easily use the theoretical results to calculate the property of $$S$$. In the second case, bootstrapping can provide a workaround to give you an approximated form of the distribution of $$S$$.\n\nThe book gives an example, where $$X$$ and $$Y$$ are random variables and you are interested in the random variable $$\\alpha$$ which is a function of the variance of $$X$$ and $$Y$$, $$\\sigma_X^2$$, $$\\sigma_Y^2$$, and their covariance $$\\sigma_{XY}$$. Since these are unknown, you can estimate them from the sample, getting $$\\hat{\\alpha}$$.\n\nHere, they simulate different scenarios to show you what the variability of $$\\hat{\\alpha}$$ can be.\n\nRemember that in reality, you have only one $$\\hat{\\alpha}$$.\n\nBut, let's say that you know the expected distributions of $$X$$ and $$Y$$, then you can simulate different scenarios, by sampling $$X$$ and $$Y$$ from the expected distributions.\nFor instance, let's say that $$Z=(X, Y)$$ is a 2-dimensional random variable defined by merging $$X$$ and $$Y$$. Let's suppose that $$Z$$ is distributed as a 2-dimensional Normal distribution with mean $$\\mu_Z=(\\mu_X, \\mu_Y)$$, and variance-covariance matrix $$\\Sigma$$.\n\n$$Z|\\mu_Z, \\Sigma \\sim N(\\mu_Z, \\Sigma)\\\\ \\Sigma = \\pmatrix{\\sigma_X^2 & \\sigma_{XY} \\\\ \\sigma_{XY} & \\sigma_Y^2}$$\n\nThen, simulating 1000 times this stochastic system is equivalent to randomly sample $$Z$$ from the given distribution.\nThis is a R snippet where you need to specify the means and variance, covariance values:\n\nmu_z = (mu_x, mu_y)\ncov_mat = rbind(c(sig_x, sig_xy), c(sig_xy, sig_y))\n\nz = MASS::mvrnorm(n=1000, mu=mu_z, Sigma=cov_mat)\n\n\nNow that you have 1000 $$Z$$ ($$X$$, $$Y$$ pairs), you can calculate $$\\hat{\\alpha}$$ from each.\nThe advantage of simulating is that we know the theoretical variances and covariance from which we sampled the $$X$$ and $$Y$$, so we can compare the simulated $$\\hat{\\alpha}$$ with the \"true\" $$\\alpha$$.\n\nAs you can see, they show that the maximum likelihood estimation of $$\\alpha$$ (its mean) is pretty close to the theoretical value 0.6\n\n$$\\bar{\\alpha}=\\frac{1}{1000}\\sum_{i=1}^{1000} \\hat{\\alpha}_i=0.5996$$\n\nwith a standard deviation equal 0.083. This value tells you how close the estimate is to the real $$\\alpha$$.\n\nNow we go back to the real scenario, where you have only one sample with unknown distribution.\n\nThe question is how can we estimate the error of our estimate with only one sample?\n\nThis is where bootstrap comes into play.\n\nBootstrapping is a procedure to estimate the variability of a random variable given a single sample.\n\nThe procedure is simple. You repeat a large number of times $$i=1,\\ldots,N$$:\n\n1. Randomly sample $$n$$ observations ($$n$$ equal to the number of observations in the dataset) from the dataset with replacement\n2. Estimate your statistics ($$\\hat{\\alpha_i}$$ in our example) using this sample\n\nFinally:\n\n1. Calculate mean and standard deviation or quantile intervals\n\nNow, you can realise the principle behind this procedure.\nThe main assumption is that your sample is one realisation of infinite possible scenarios all distributed following some theoretical distribution. That means that there is an unknown distribution driving the phenomenon, and when you observe the phenomenon you are randomly sampling from that distribution. Parameters of this distribution are fixed (unknown), data vary.\n\nWhen you don't have multiple samples, you can assume that your data is roughly representing the statistical properties of the underlying population. Then you can randomly sample with replacement and estimate the variability of your statistics."
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.8600749,"math_prob":0.99986553,"size":3835,"snap":"2020-34-2020-40","text_gpt3_token_len":933,"char_repetition_ratio":0.1412164,"word_repetition_ratio":0.0034013605,"special_character_ratio":0.25449803,"punctuation_ratio":0.11347517,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9999875,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2020-09-30T16:43:33Z\",\"WARC-Record-ID\":\"<urn:uuid:87880f8c-3768-4988-bf03-434774a06208>\",\"Content-Length\":\"154416\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:11a4caeb-551c-4c5d-bb02-828f27bea8c5>\",\"WARC-Concurrent-To\":\"<urn:uuid:6f64112b-17f6-4f40-8575-124eae76ab5e>\",\"WARC-IP-Address\":\"151.101.1.69\",\"WARC-Target-URI\":\"https://stats.stackexchange.com/questions/475693/understanding-the-bootstrap-method-in-introduction-to-statistical-learning\",\"WARC-Payload-Digest\":\"sha1:CWA64TO6H5CAV7NAM4CLNXZ2GPR5PRQW\",\"WARC-Block-Digest\":\"sha1:MQHOJJRSAUHH64FKFFFSLARMLDEYEB3A\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2020/CC-MAIN-2020-40/CC-MAIN-2020-40_segments_1600402127075.68_warc_CC-MAIN-20200930141310-20200930171310-00206.warc.gz\"}"} |
https://file.scirp.org/Html/88387_88387.htm | [
" Computing Technology of a Method of Control Volume for Obtaining of the Approximate Analytical Solution to One-Dimensional Convection-Diffusion Problems\n\nOpen Access Library Journal\nVol.05 No.11(2018), Article ID:88387,6 pages\n10.4236/oalib.1104962\n\nComputing Technology of a Method of Control Volume for Obtaining of the Approximate Analytical Solution to One-Dimensional Convection-Diffusion Problems\n\nDalabaev Umurdin\n\nDepartment of Mathematics modeling and informatics, University of World Economy and Diplomacy, Tashkent, Uzbekistan",
null,
"",
null,
"",
null,
"",
null,
"Received: October 8, 2018; Accepted: November 6, 2018; Published: November 9, 2018\n\nABSTRACT\n\nThe solution of problem convection-diffusion equation by way of control volume method is considered. Approximate solution of problem is received. Three point scheme of high resolution is constructed.\n\nSubject Areas:\n\nComputational Physics\n\nKeywords:\n\nConvection-Diffusion Equation, Control Volume Method, Moved Node",
null,
"1. Introduction\n\nMany physical problems involve the combination of convective and diffusive processes. Convection-diffusion problems arise frequently in many areas of applied sciences and engineering. They occur in fields where mathematical modeling is important such as physics, engineering and particularly in fluid dynamics and transport problems.\n\nMathematical models of physical, chemical, biological and environmental phenomena are governed by various forms of differential equations.\n\nConvection-diffusion problems are governed by typical mathematical models, which are common in fluid and gas dynamics. Heat and mass transfer is conducted not only via diffusion, but appears due to motion of a medium, too.\n\nWhen velocity is higher, that is, flow term is larger, a simple convection- diffusion problem is converted to convection-dominated diffusion problem because Peclet number is greater than two. A Peclet number is a dimensionless number relevant in the study of transport phenomena in fluid flows. It is defined to be the ratio of the rate of advection of a physical quantity by the flow to the rate of diffusion of the same quantity driven by an appropriate gradient. For diffusion of heat (thermal diffusion), Peclet number is defined as, Pе= F/D where F is the flow term and D is the diffusion term.\n\nFinite volume methods are widely used in computational fluid dynamics. The elementary finite volume method uses a cell-centered mesh and finite-difference approximations of first order derivatives. This paper shows how the finite volume method is applied to a simple model of convective transport: the one- dimensional convection-diffusion equation.\n\nThere are two primary goals of this paper. The first is to apply the finite volume method to obtain approximately analytical solution. The second one is construct scheme which works for all mesh Peclet number. Readers interested in additional details, including application to the Navier-Stokes equations, should consult the classic text by Patankar . The basic attention at a numerical solution is given to problems of approximation of convective terms .\n\nUsually, solution of differential equations by numerical methods is obtained in the form of numbers. Here we will show a possibility of deriving of a solution of differential equations by control volume methods in the approximately-analytical form by the so-called moved node.\n\nSuch type research it is considered in work with the finite deference method.\n\n2. Deriving of the Approximately-Analytical Solution\n\nLet’s consider one-dimensional the convection-diffusion equation on a interval $\\left[W,E\\right]$ :\n\n$\\frac{\\text{d}}{\\text{d}x}\\left(\\rho u\\Phi \\right)=\\frac{\\text{d}}{\\text{d}x}\\left(\\Gamma \\frac{\\text{d}\\Phi }{\\text{d}x}\\right)+S\\left(x\\right)$ (1)\n\nwith boundary conditions\n\n$\\text{d}\\Phi \\left(W\\right)/\\text{d}x={a}_{0}\\Phi \\left(W\\right)+{a}_{1},\\text{\\hspace{0.17em}}\\text{\\hspace{0.17em}}\\text{\\hspace{0.17em}}\\text{\\hspace{0.17em}}\\text{d}\\Phi \\left(E\\right)/\\text{d}x={b}_{0}\\Phi \\left(E\\right)+{b}_{1}$ (2)\n\nwhere u a stream velocity in a x direction, $\\rho$ a stream denseness, $\\Gamma$ ―a diffusivity, $S\\left(x\\right)$ ―a given function (source), $\\Phi$ ―unknown function. From an equation of continuity implies that $F=\\rho u=const$ .\n\nLet’s consider the Equation (1) on segments $\\left[W,E\\right]$ . For deriving of the approached analytical solution of a problem by the method of control volume we take an arbitrary point $x\\in \\left[W,E\\right]$ and control volume $\\left[w,e\\right]$ . In Figure 1, x is arbitrary point in control volume. x is so-called moved node.\n\nFigure 1. Control volume.\n\nLet’s suppose that, the edge w is arranged in the middle between points W and x, and an edge e―in the middle between points x and E. Integrating the Equation (1) on control volume and substituting, derivatives the upwind scheme we will receive zero approach\n\n$\\left({а}_{Е}+{а}_{W}\\right){\\Phi }^{0}={а}_{Е}{\\Phi }_{E}^{0}+{а}_{W}{\\Phi }_{W}^{0}+\\frac{E-W}{2}\\cdot S\\left(x\\right)$ (3)\n\nhere ${a}_{E}=\\frac{\\Gamma }{Е-х}+\\mathrm{max}\\left(-F,0\\right);{a}_{W}=\\frac{\\Gamma }{x-W}+\\mathrm{max}\\left(F,0\\right)$ . As $x\\in \\left[W,E\\right]$ an arbitrary point from (3) we can define ${\\Phi }^{0}$ and receive the approached analytical solution of a problem (1) $\\left({\\Phi }_{W}^{0},{\\Phi }_{E}^{0}\\right)$ are defined on a basis (2)). The source term is obtained by assuming that S has the uniform value of the control volume.\n\nTo improve approximate solution we take additional grids: ${x}_{1}=\\frac{x+W}{2},{x}_{2}=\\frac{x+E}{2}$ . Let’s write the upwind scheme of type (3) for a segment $\\left[W,x\\right]$ , $\\left[{x}_{1},{x}_{2}\\right]$ and $\\left[x,E\\right]$ . Let’s receive system from three equations. We exclude the received system, ${\\Phi }^{1}\\left({x}_{1}\\right),{\\Phi }^{1}\\left({x}_{2}\\right)$ and as a result we will receive the improved scheme:\n\n$\\begin{array}{l}\\left[\\frac{{\\beta }_{1}^{+}}{1+{\\tau }_{1}}+\\frac{{\\alpha }_{1}^{-}}{1+{\\gamma }_{1}}\\right]{\\Phi }^{1}=\\frac{{\\beta }_{1}^{+}}{1+{\\tau }_{1}}{\\Phi }_{W}^{1}+\\frac{{\\alpha }_{1}^{-}}{1+{\\gamma }_{1}}{\\Phi }_{E}^{1}+\\frac{E-W}{4}\\cdot S\\left(x\\right)\\\\ +\\frac{1}{1+{\\tau }_{1}}\\cdot \\frac{x-W}{2}\\cdot S\\left(W+\\frac{x-W}{2}\\right)+\\frac{1}{1+{\\gamma }_{1}}\\cdot \\frac{E-x}{2}\\cdot S\\left(x+\\frac{E-x}{2}\\right),\\end{array}$ (4)\n\nwhere ${\\tau }_{1}={\\beta }_{1}^{-}/{\\beta }_{1}^{+}$ , ${\\gamma }_{1}={\\alpha }_{1}^{+}/{\\alpha }_{1}^{-}$ , ${\\beta }_{1}^{-}=2{D}_{W}+{F}^{-}$ , ${\\beta }_{1}^{+}=2{D}_{W}+{F}^{+}$ , ${\\alpha }_{1}^{-}=2{D}_{E}+{F}^{-}$ , ${\\alpha }_{1}^{+}=2{D}_{E}+{F}^{+}$ , ${D}_{E}=\\Gamma /\\left(E-x\\right)$ , ${D}_{W}=\\Gamma /\\left(x-W\\right)$ , ${F}^{-}=\\mathrm{max}\\left(-F,0\\right)$ , ${F}^{+}=\\mathrm{max}\\left(F,0\\right)$ . In (4) ${\\Phi }^{1}$ improved value of unknown function in a point x $\\left({\\Phi }_{W}^{1}\\equiv {\\Phi }_{W},{\\Phi }_{E}^{1}\\equiv {\\Phi }_{E}\\right)$ , ( ${\\Phi }_{W}^{1},{\\Phi }_{E}^{1}$ are defined on the basis of (2)).\n\nSolving (4) rather ${\\Phi }^{1}$ again for solution improving we will arrive similarly: write the scheme (4) for a segment $\\left[W,x\\right]$ , $\\left[{x}_{1},{x}_{2}\\right]$ and $\\left[x,E\\right]$ , and receive the improved analytical solution. Also we will exclude unknowns in points ${x}_{1}$ and, ${x}_{2}$ etc. Continuing this process we will obtain\n\n$\\begin{array}{l}\\left[\\frac{\\left(1-{\\tau }_{k}\\right){\\beta }_{k}^{+}}{1-{\\tau }_{k}^{{2}^{k}}}+\\frac{\\left(1-{\\gamma }_{k}\\right){\\alpha }_{k}^{-}}{1-{\\gamma }_{k}^{{2}^{k}}}\\right]{\\Phi }^{k}\\\\ =\\frac{\\left(1-{\\tau }_{k}\\right){\\beta }_{k}^{+}}{1-{\\tau }_{k}^{{2}^{k}}}{\\Phi }_{W}^{k}+\\frac{\\left(1-{\\gamma }_{k}\\right){\\alpha }_{k}^{-}}{1-{\\gamma }_{k}^{{2}^{k}}}{\\Phi }_{E}^{k}+\\frac{E-W}{{2}^{k+1}}\\cdot S\\left(x\\right)\\\\ \\text{\\hspace{0.17em}}\\text{\\hspace{0.17em}}\\text{ }\\text{ }+\\frac{1-{\\tau }_{k}}{1-{\\tau }_{k}^{{2}^{k}}}\\cdot \\frac{x-W}{{2}^{k}}\\cdot \\underset{j=1}{\\overset{{2}^{k}-1}{\\sum }}\\underset{i=1}{\\overset{j}{\\sum }}{\\tau }_{k}^{i-1}S\\left(W+j\\frac{x-W}{{2}^{k}}\\right)\\\\ \\text{\\hspace{0.17em}}\\text{\\hspace{0.17em}}\\text{ }\\text{ }+\\frac{1-{\\gamma }_{k}}{1-{\\gamma }_{k}^{{2}^{k}}}\\cdot \\frac{E-x}{{2}^{k}}\\cdot \\underset{j=1}{\\overset{{2}^{k}-1}{\\sum }}\\underset{i=1}{\\overset{j}{\\sum }}{\\gamma }_{k}^{i-1}S\\left(x+\\left({2}^{k}-j\\right)\\frac{E-x}{2}\\right),\\end{array}$ (5)\n\nwhere ${\\tau }_{k}={\\beta }_{k}^{-}/{\\beta }_{k}^{+}$ , ${\\gamma }_{k}={\\alpha }_{k}^{+}/{\\alpha }_{k}^{-}$ , ${\\beta }_{k}^{-}={2}^{k}{D}_{W}+{F}^{-}$ , ${\\beta }_{k}^{+}={2}^{k}{D}_{W}+{F}^{+}$ , ${\\alpha }_{k}^{-}={2}^{k}{D}_{E}+{F}^{-}$ , ${\\alpha }_{k}^{+}={2}^{k}{D}_{E}+{F}^{+}$ .\n\nIn (5) ${\\Phi }^{k}$ improved value of unknown function in a point $x\\left({\\Phi }_{W}^{k}\\equiv {\\Phi }_{W},{\\Phi }_{E}^{k}\\equiv {\\Phi }_{E}\\right)$ . Solving the Equation (5) rather we will receive the approached analytical solution of an initial problem.\n\n3. Examples\n\nOn Figure 2, solutions of a problem: $50{\\Phi }^{\\prime }\\left(x\\right)={\\Phi }^{″}\\left(x\\right)+50\\mathrm{sin}\\left(\\text{π}x\\right)$ are reduced on segments $\\left[0,1\\right]$ with boundary conditions ${\\Phi }_{W}=0,{\\Phi }_{E}=0$ . From the graph it is visible that, in process of magnification to approximate solutions comes nearer to the exact.\n\nOn Figure 3, solutions of a problem $5{\\Phi }^{\\prime }\\left(x\\right)={\\Phi }^{″}\\left(x\\right)$ are reduced on segments $\\left[0,1\\right]$ with boundary conditions ${\\Phi }_{W}=0,{\\Phi }^{\\prime }\\left(E\\right)=0.5{\\Phi }_{E}+10$ .\n\n4. Numerical Experiments\n\nThe analytical scheme (5) allows not only receiving the approached analytical solution, but also gives the chance in creation of the qualitative scheme.\n\nComparisons of exact and difference solutions are on Figure 4 reduced.\n\nSolution of problem $50{\\Phi }^{\\prime }\\left(x\\right)={\\Phi }^{″}\\left(x\\right)+S\\left(x\\right)$ are on Figure 4 graphs on $\\left[0,1\\right]$ with boundary conditions ${\\Phi }_{W}=0,{\\Phi }_{E}=1$ . Source $S\\left(x\\right)=10-50x$ at $x<0.3$ , $S\\left(x\\right)=50x-20$ at $0.3 and $S\\left(x\\right)=0$ at $0.4\\le x$ .\n\nIn Figure 4, numerical results are received at $h=0.1$ and ${P}_{h}=5$ , (mesh\n\nFigure 2. Continuous line―exact, pointwise―k = 0, dotted―k = 2, rare dashed―k = 6.\n\nFigure 3. Continuous line―exact, pointwise―k = 0, dotted―l = 1, long dashed―k = 6.\n\nFigure 4. Comparison of various schemes.\n\nFigure 5. Comparison finite difference and control volume method.\n\nPeclet number). Solid line is exact solutions of the problem. Rectangles under the scheme of Patankar, diamond at $k=2$ and circles at $k=6$ . From Figure 4 appears that, the offered schemes yield good results.\n\nComparison of analytical solutions received finite difference and a method of control volume shows advantage of a method of control volume (Figure 5). On Figure 5, it is shown errors received by these methods. On Figure 5 point wise line corresponds to the difference exact and solutions received by the finite difference method, and dashed―difference exact and solutions of the control volume (k = 4) $\\left(10{\\Phi }^{\\prime }\\left(x\\right)={\\Phi }^{″}\\left(x\\right)+10\\mathrm{cos}\\left(10x\\right),\\Phi \\left(0\\right)=0,\\Phi \\left(1\\right)=1\\right)$ .\n\n5. Conclusion\n\nThe approached analytical solution to one-dimensional convection-diffusion problems is received. The algorithm of deriving of a solution is based on the control volume method. The analytical solution allows also constructing the compact scheme. It is the three point scheme of the high order of resolution. It is the scheme that is suitable for any Peclet numbers.\n\nConflicts of Interest\n\nThe author declares no conflicts of interest regarding the publication of this paper.\n\nCite this paper\n\nUmurdin, D. (2018) Computing Technology of a Method of Control Volume for Obtaining of the Approximate Analytical Solution to One- Dimensional Convection-Diffusion Problems. Open Access Library Journal, 5: e4962. https://doi.org/10.4236/oalib.1104962\n\nReferences\n\n1. 1. Patankar, S.V. (1980) Numerical Heat Transfer and Fluid Flows. Hemisphere Publishing Corporation, New York.\nhttps://doi.org/10.1201/9781482234213\n\n2. 2. Leonard, B.P. (1990) A Stable and Accurate Convective Modelling Procedure Based on Quadratic Upstream Interpolation. Computer Methods in Applied Mechanics and Engineering, 19, 59-98.\nhttps://doi.org/10.1016/0045-7825(79)90034-3\n\n3. 3. Leonard, B.P. and Mokhtari, S. (1990) Beyond First-Order Upwinding: The Ultra Sharp Alternative for Non-Oscillatory Steady-State Simulation of Convection. International Journal for Numerical Methods in Engineering, 30, 729.\nhttps://doi.org/10.1002/nme.1620300412\n\n4. 4. Leonard, B.P. (1991) The ULTIMATE Conservative Difference Scheme Applied to Unsteady One-Dimensional Advection. Computer Methods in Applied Mechanics and Engineering, 88, 17-74.\nhttps://doi.org/10.1016/0045-7825(91)90232-U\n\n5. 5. Ferreira, V.G., de Queiroz, R.A.B., Lima, G.A.B., Cuenca, R.G., Oishi, C.M., Azevedo, J.L.F. and McKee, S., (2012) A Bounded Upwinding Scheme for Computing Convection-Dominated Transport Problems. Computers and Fluids, 57, 208-224.\nhttps://doi.org/10.1016/j.compfluid.2011.12.021\n\n6. 6. Dalabaev, U. (2016) Difference-Analytical Method of the One-Dimensional Convection-Diffusion Equation. IJISET-International Journal of Innovative Science, Engineering & Technology, 3, 234-239.\nhttp://www.ijiset.com/"
] | [
null,
"https://html.scirp.org/file/88387x1.png",
null,
"https://html.scirp.org/file/9-2500537x3.png",
null,
"https://html.scirp.org/file/9-2500537x2.png",
null,
"https://html.scirp.org/file/18-1760983x4.png",
null,
"https://html.scirp.org/file/2-1410169x6.png",
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.8784202,"math_prob":0.99933314,"size":9160,"snap":"2020-34-2020-40","text_gpt3_token_len":2102,"char_repetition_ratio":0.1395806,"word_repetition_ratio":0.056163386,"special_character_ratio":0.23231441,"punctuation_ratio":0.16280417,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9999455,"pos_list":[0,1,2,3,4,5,6,7,8,9,10],"im_url_duplicate_count":[null,2,null,null,null,null,null,null,null,null,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2020-09-21T13:54:22Z\",\"WARC-Record-ID\":\"<urn:uuid:5f9c0741-3da0-46f9-810d-56c3e5abb14a>\",\"Content-Length\":\"78193\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:82b69bf6-c1f3-4b26-8e41-7c1b93ab6c88>\",\"WARC-Concurrent-To\":\"<urn:uuid:c6949388-0665-4d23-8902-e1ffc1d53bfe>\",\"WARC-IP-Address\":\"209.141.51.63\",\"WARC-Target-URI\":\"https://file.scirp.org/Html/88387_88387.htm\",\"WARC-Payload-Digest\":\"sha1:EE7APPYZXGTAXKA6QGHDQKY76VT5SJ5I\",\"WARC-Block-Digest\":\"sha1:D5WABBOOACDDZHTP3NA7RLGCYKGGZ6PX\",\"WARC-Identified-Payload-Type\":\"application/xhtml+xml\",\"warc_filename\":\"/cc_download/warc_2020/CC-MAIN-2020-40/CC-MAIN-2020-40_segments_1600400201699.38_warc_CC-MAIN-20200921112601-20200921142601-00056.warc.gz\"}"} |
https://community.wolfram.com/groups/-/m/t/872077 | [
"# Agent Navigates Maze\n\nPosted 3 years ago\n5408 Views\n|\n4 Replies\n|\n24 Total Likes\n|\n\n## Introduction",
null,
"My last post was eventually concerned with finding the shortest path through a maze and potential applications to a separate project on simulating urban traffic. The solution to solving the maze was ultimately found by flooding it – not very realistic but it did so without prior knowledge of the mazes layout. So as a response to this – and also to research more methods in pathfinding and obstacle avoidance, I’ve written an agent who can navigate a maze (or arbitrary environment of obstacles). It aims to display realistic behaviours and capabilities when exploring. Its goal is to escape by reaching any point on the boundary of its environment and does so by exploring; walking towards unseen territory. The program is presented with a user interface to easily draw mazes, monitor progress and review the agent’s daring escape.\n\n## Calculating Field of View (FOV)",
null,
"The user draws obstacles by setting points for B Spline curves. Coordinates which lie on the curves are detected within the agents FOV and interpreted as obstructions (walls).",
null,
"Fig. 1. (I) Agent scans for obstacles. (II) Intersection between scanning region and environment produce points. (III) Points form FOV region.\n\nThe region search is defined as a rectangle plotted from the agent's origin to the length of it's sight range (range) and takes an argument for angle of rotation which is picked from the list scan.\n\nsearch = TransformedRegion[\nRectangle[{#1 + #6, #2 - 0.2}, {#1 + #6 + #3, #2 + 0.2}],\nRotationTransform[#5, {#1, #2}]] &;\n\nscan = Range[-\\[Phi]/2, \\[Phi]/2, 0.01];\n\n\nRegion membership determines if any points (representing obstructions) in the environment fall within search (Fig 1. i). If so, the point is appended to a list. For the case of more than one point (Fig 1. iii), then the point nearest to the agent's origin is returned. If no points are detected (Fig 1. ii) then a point is calculated according to the length range at a rotation of the current scan value.\n\nAngleVector[{pt[], pt[]}, {range + scale, \\[Theta] + scan[[i]]}]\n\n\nOnce complete, the scanning angle is incremented by picking the next value from scan and the process is repeated until the last element from scan has been picked.\n\n(* determine FOV region *)\nFOVcalc := (\n(* inc. steps *)\nscan = Range[-\\[Phi]/2, \\[Phi]/2, 0.01];\n(* viewlist keeps list of XY points used to draw polygon,\nrepresented as region *)\n\n(* flags list elements representing walls \"W\" or limit of sight \\\n\"L\" *)\nviewList = ReplacePart[#,\nNormal[\nPosition[Total /@ Map[Length, #, {2}],\n0] -> (Insert[#, \"W\", -1] & /@\nPartition[\nExtract[#, Position[Total /@ Map[Length, #, {2}], 0]],\n1])]\n]\n] &[Insert[Table[\n(* while scanning, if no obstruction is detected,\nreturn maximal point,\nif obstruction is detected and there exists more than one \\\npoint, return point closest to origin (agent location), else,\nreturn detected point *)\nIf[Length[Dimensions[#]] > 1,\nKeys[TakeSmallest[<|\nEuclideanDistance[#, {pt[], pt[]}] & /@ #]|>,\n1]][] &[#], #] &[\nExtract[Flatten[map, 1],\n\nPosition[\nRegionMember[\nsearch[pt[], pt[],\nrange, \\[Phi], \\[Theta] + scan[[i]], scale]][\nFlatten[map, 1]], True]] /.\nx_ /; x == {} -> {AngleVector[{pt[],\npt[]}, {range + scale, \\[Theta] + scan[[i]]}],\n\"L\"}], {i, 1, Length[scan]}], {pt[], pt[]}, 1]\n]\n);\n\n\nUltimately, evaluating FOVcalc generates the list of points viewList which are used to draw a polygon as the basis for the FOV region (Fig. 1 iii).\n\nThe attached notebook contains cells for producing such demonstrations as below:",
null,
"Its noted that altering the default sight angle raises some scaling issues.\n\n## Generating the Virtual Environment",
null,
"Agent evaluates rotateSearch\n\n(* calculates new FOV, enviroment data and traversal graph *)\nlook := (\nFOVcalc; refreshAgentVision; computeGraphSpace;\nAppendTo[sessionData, {Values[env], pMap}]\n);\n\n(* agent looks while performing full rotation *)\nrotateSearch := Do[\n\\[Theta] += \\[Pi]/4;\nlook,\n8\n];",
null,
"Discretized spline functions give a list of coordinates which are employed via FOVcalc to return the location of walls (\"O\"). Region membership between newly calculated FOV region and environment coordinates return space which is currently visible (\"V\") while yielding space which was previously visible and thus discovered (\"D\"). Member coordinates of the agent's footprint are set as \"A\". The distance from each discovered or visible coordinate to the nearest wall coordinate is calculated and used to weigh further computations.\n\nEquipped with an agent which can see, we now use this to define where obstacles lie within the FOV and ultimately return information of what the perceived environment looks like. First, we get the location of obstacles (walls).\n\nwalls := DeleteDuplicates[\nIntegerPart /@\nRest[Extract[viewList, Position[viewList, {_, \"W\"}]][[All, 1]]]];\n\n\nEntries in viewList are flagged with either a \"W\" (wall) or \"L\" (limit of sight) so extracting the correct entries is easy. If we didn't make the classification then points generated at the limit of the sight range would be interpreted as walls.\n\nThe perceived environment is stored as an array of characters with dimensions equal to the width (xLen) and height (yLen) of the environment (default 100x100).\n\nenv = AssociationThread[Flatten[Array[{#1, #2} &, {xLen, yLen}], 1],\nConstantArray[\"E\", xLen*yLen]];\n\n\nInitially constant (\"E\" for empty), entries are updated as the agent sees more of it's surroundings. For example,\n\n(* draw walls *)\nDo[(env[#[[i]]] = \"O\"), {i, 1, Length[#]}] &[walls];\n\n\nSince the environment array is used to review the programs output, we also add other useful information such as the agent's current position\n\n(* highlight agent position *)\nDo[(env[#[[i]]] = \"A\"), {i, 1, Length[#]}] &[\nComplement[\nPosition[\nArrayReshape[\nRegionMember[Disk[{pt[], pt[]}, scale], Keys[env]], {xLen,\nyLen}], True]\n, walls]\n];\n\n\nand it's FOV\n\n(* highlight current FOV *)\nDo[(env[#[[i]]] = \"V\"), {i, 1, Length[#]}] &[\nKeys[KeyTake[env,\nPosition[\nArrayReshape[\nRegionMember[Polygon[viewList[[All, 1]]]][Keys[env]], {xLen,\nyLen}], True]]]];\n\n\nWe want to know the distance each location has to the nearest wall for later computation\n\n(* - calculates to-wall distances for navigation - *)\n(* XY cords for visible space and walls *)\nvisibleSpace = Keys[Select[env, # == \"V\" &]];\nobstructed = Keys[Select[env, # == \"O\" &]];\n(* compute distance to nearest wall for each member of visibleSpace \\\n*)\ntoWallDistances = Table[\nIntegerPart[\nN[Min[EuclideanDistance[visibleSpace[[i]], #] & /@ obstructed]]]\n, {i, 1, Length[visibleSpace]}];\n\n\nThe to-wall distances for each location are held in the array pMap\n\n(* update to-wall distances for each visible location *)\npMap = ReplacePart[pMap,\n\n\nThen, for presentation, a colour scheme is defined which translates the to-wall distances into something more intuitive\n\n(* abs. scaled color rules generate gradients using to-wall distances \\\n*)\ncolRulesWallDist =\nJoin[ReplacePart[\nRange[0, 15] -> GrayLevel /@ (N@Range[0, 15]/15)]],\n1 -> (0 -> RGBColor[0.4, 0.5, 0.6])],\nNormal[\nRange[16, Max[{xLen, yLen}]] ->\nTable[GrayLevel[1.], Length[Range[16, Max[{xLen, yLen}]]]]]\n]\n];",
null,
"Like env, pMap is also initially constant (0) and its values are procedurally updated. A value of 0 means that this corresponding environment location is undiscovered. As the agent explores, these values will be replaced and the maze begins to emerge.\n\n(* updates visible enviroment *)\nrefreshAgentVision := (\n(* remove previous agent position (if applicable) *)\nDo[(env[#[[i]]] = \"D\"), {i, 1, Length[#]}] &[\nKeys[Select[env, # == \"A\" &]]];\n\n(* highlight agent position *)\nDo[(env[#[[i]]] = \"A\"), {i, 1, Length[#]}] &[\nComplement[\nPosition[\nArrayReshape[\nRegionMember[Disk[{pt[], pt[]}, scale],\nKeys[env]], {xLen, yLen}], True]\n, walls]\n];\n\n(* ammend previous FOV as 'discovered' (if applicable) *)\nDo[(env[#[[i]]] = \"D\"), {i, 1, Length[#]}] &[\nKeys[Select[env, # == \"V\" &]]\n];\n\n(* highlight current FOV *)\nDo[(env[#[[i]]] = \"V\"), {i, 1, Length[#]}] &[\nKeys[KeyTake[env,\nPosition[\nArrayReshape[\nRegionMember[Polygon[viewList[[All, 1]]]][Keys[env]], {xLen,\nyLen}], True]]]];\n\n(* draw walls *)\nDo[(env[#[[i]]] = \"O\"), {i, 1, Length[#]}] &[walls];\n\n(* - calculates to-wall distances for navigation - *)\n(* XY cords for visible space and walls *)\nvisibleSpace = Keys[Select[env, # == \"V\" &]];\nobstructed = Keys[Select[env, # == \"O\" &]];\n(* compute distance to nearest wall for each member of \\\nvisibleSpace *)\ntoWallDistances = Table[\nIntegerPart[\nN[Min[EuclideanDistance[visibleSpace[[i]], #] & /@ obstructed]]]\n, {i, 1, Length[visibleSpace]}];\n\n(* update to-wall distances for each visible location *)\npMap =\nReplacePart[pMap,\n\n(* procedurally scaled color rules generate gradients using to-\nwall distances *)\nGrayLevel/@(N@Range[0,#]/#)]]&[Max[Flatten[pMap]]],1\\[Rule](0->\nRGBColor[0.4,0.5,0.6])];*)\n\n(* abs. scaled color rules generate gradients using to-\nwall distances *)\ncolRulesWallDist =\nJoin[ReplacePart[\nRange[0, 15] -> GrayLevel /@ (N@Range[0, 15]/15)]],\n1 -> (0 -> RGBColor[0.4, 0.5, 0.6])],\nNormal[\nRange[16, Max[{xLen, yLen}]] ->\nTable[GrayLevel[1.], Length[Range[16, Max[{xLen, yLen}]]]]]\n]\n];\n);\n\n\nAnd the corresponding colour scheme\n\n(* draws enviroment according to color rules *)\ncolRules = {\"A\" -> Hue[0.3, 0.8, 0.3], \"E\" -> Hue[0, 0, 0, 0],\n\"O\" -> Red, \"V\" -> Hue[0.5, 0.5, 0.75, 0.3],\n\"D\" -> Hue[0, 0, 0, 0]};",
null,
"An early implementation of this as an example is below",
null,
"## Navigating the Environment\n\nThe agent cannot be able to walk through walls so coordinates assigned as obstructions are excluded when considering where the agent can move to.\n\npSpace = Select[env, # == \"V\" || # == \"D\" || # == \"A\" &];\n\n\nSince the agent's dimensions are also greater than one unit of space, it also cannot occupy regions immediately next to a wall. Thus we use the to-wall distances from earlier to compute a set of invalid space.\n\n(* vertex coordinates *)\nvCoords = Keys[pSpace];\n\nvWeigths = Table[Extract[pMap, #[[i]]], {i, 1, Length[#]}] &[vCoords];\n\n(* vertices with to-wall distance greater than scale *)\ninvSpace = Extract[vCoords, Position[vWeigths, _?(# < scale - 1 &)]];\n\n\nAll together, this forms the basis for traversalGraph; the graph of locations which the agent can potentially travel to.\n\ntraversalGraph =\nGraph[Flatten[\nTable[Table[#[] \\[DirectedEdge] #[[2, i]], {i, 1,\nLength[#[]]}] &[{#[[j]],\nIntersection[NN[#[[j]]], #]} &[#]], {j, 1, Length[#]}] &[\nKeys[KeyDrop[pSpace, invSpace]]], 1]\n];\n\n\nThat's not quite enough though as its possible that the agent will see a region of space through a gap too small to travel through but decide to go there anyway. This region may still be valid but unconnected form its current position. There also needs to be a means of choosing a valid point to traverse to and are categorized by needsRotation and needsTraversal (old terminology from much earlier in the project).\n\nThese points of traversal are referred to as sight edges, i.e., places the agent can't see and thus would like to travel to.\n\n(* end locations not bordering to-wall limits - i.e., dead-ends. \\\nexcludes unconnected vertices *)\nsightEdges := Intersection[\nConnectedComponents[traversalGraph, {verticeLocation}][],\nComplement[\nExtract[VertexList[traversalGraph],\nPosition[VertexDegree[traversalGraph], _?(# < 8 &)]],\nExtract[vCoords, Position[vWeigths, _?(# < scale &)]]]\n];",
null,
"Fig 2. Vertices within section III are all connected to the agent's position, while conversely, I and II are unconnected and so contained points are excluded when returning list of sight edges.",
null,
"Fig 3. (i) Of all connected space, vertices within the to-wall limit are naturally excluded. (ii) Vertices with degree less than 8 are included except if they neighbour the to-wall limit - travelling there would yield no further discovery. (iii) Interior vertices (degree 8) are excluded since they are not edges. Lastly, what remains are assumed to represent locations to explore (sight edges). Blue points and red points represent needsRotation (iv) and needsTraversal (v) respectively.\n\n(* points bordering uncovered space - select only points neighbouring \\\nat lest one uncovered location *)\n\n(* points within sight range *)\nneedsRotation :=\nKeys[Select[\nAssociationThread[# -> (AllTrue[#, # == \"D\" &] & /@ (Values[\nKeyTake[env, #] & /@ (NN /@ #)]))],\n# == False &]\n] &[\nKeys[Select[sightEdgeDistances, # <= range &]]\n];\n\n(* points at limit of sight range *)\nneedsTravel :=\nKeys[Select[\nAssociationThread[# -> (AllTrue[#, # == \"D\" &] & /@ (Values[\nKeyTake[env, #] & /@ (NN /@ #)]))],\n# == False &]\n] &[\nKeys[Select[sightEdgeDistances, # > range &]]\n];\n\n\nWe've narrowed down the environment to a small list of possible locations to explore, yet many of them are very similar so we can refine this selection even further.\n\n(* clusters and find central location of points *)\nclusterCP = Table[{\nTotal[First /@ #[[i]]]/Length[First /@ #[[i]]],\nTotal[Last /@ #[[i]]]/Length[Last /@ #[[i]]]\n}, {i, 1, Length[#]}] &[FindClusters[#]] &;\n\n\nApplying clusterCP with any list of sight edges returns the point which is the average location of groups of sight edges. The green and purple points in Fig. 3 are calculated via\n\nGraphics[{\n{PointSize -> Large, Green, Point[clusterCP[needsRotation]]},\n{PointSize -> Large, Purple, Point[clusterCP[needsTravel]]}\n}]\n\n\nUltimately, the agent will need to decide which of these points (held as a list opt) it should travel to.\n\n(* candidate targets to walk to *)\nopt := Flatten[\nNearest[Keys[KeyDrop[pSpace, invSpace]], #, 1] & /@ Join[\nclusterCP[needsRotation],\nclusterCP[needsTravel]\n], 1];\n\n\n## Finding an Optimal Path",
null,
"The agent finds a path between its current position and each of the clustered sight edges.",
null,
"A path between the agent’s current position ( $v_0$) and target ( $v_T$) which minimizes path length while maximizing to-wall distances is searched for. For the k neighbouring vertices, distance to target ( $d_T(v_k)$) and to-wall gradient ( $\\Delta W_i$) are calculated. Each of the k vertices is assigned a score via\n\n$w_1 d_T(v_k) - w_2 \\Delta W$\n\nThe chosen vertex is that with the minimal score.\n\n(* searches visible and discovered space for path between v0 and \\\ntarget *)\nWhile[v0 != verticeTarget,\nv0 = #[Min[Keys[#]]] &[(*\nlooks at NNs to v0 and scores each based on distance to target \\\nand distance from wall *)\n(w1*vertexDistanceToTarget /@ Complement[moveTo, path] - (w2*\nLookup[searchSpaceWeigths, Complement[moveTo, path]])) ->\nComplement[moveTo, path]\n]\n];\n\n\nSometimes this algorithm fails to converge so each path is checked afterwards for convergence to target. If it fails, the path is recomputed under settings favouring a more direct route.\n\n(* checks path - if optimal path could not be found then a more \\\ndirect route is attempted untill one is found *)\nWhile[\nMemberQ[path, Missing[\"KeyAbsent\", \\[Infinity]]] == True(*\npath uncomplete *),\nw1 += 1(* shift importance to finding more direct route *);\nIf[w1 >= 10, w1 = 1; w2 = 1](* attempts to find most direct path *);\nIf[w1 == 9 && w2 == 1, path = Most@path; verticeTarget = path[[-1]];\nBreak[]];\nstart];\n\n\nOnce a path is returned, it is reduced to its shortest form and smoothed with MovingAverage to appear more natural.\n\n(* reduce solution path to shortest form *)\npath = FindShortestPath[\nGraph[\nFlatten[\nTable[\nTable[\npath[[#]] \\[DirectedEdge] (NN /@ path)[[#, i]], {i, 1,\nLength[(NN /@ path)[[#]]]}] &[j],\n{j, 1, Length[path]}], 1]\n], verticeLocation, verticeTarget];\n\n(* smooth path *)\npath = Insert[\nInsert[MovingAverage[path, 10], verticeLocation, 1],\nverticeTarget, -1\n]\n\n\nEach path receives a score based on its total length and the percentage of its points which lie in previously traversed regions.\n\nAppendTo[pathChoices, {verticeTarget,\npathLength[path] - backtrack[path]}]\n\n\nThe target vertex yielding the path with the maximal score is chosen\n\n verticeTarget = First[Last[SortBy[pathChoices, Last]]];\n\n\nWith a target vertex to walk towards, the path is re-computed and set for the next stage - movement.",
null,
"The path is the list of coordinates called path. The agent moves by setting it’s current position to the next element of path and looks down the path by rotating to the tangent formed between the current path point and the next.\n\n(* agent walks towards uncovered region by following path points. \\\nBreaks if an escape location is discovered. *)\nwalk := (\n(* shows progress of walk *)\nwalkProgress = 0;\n\n(* Agent hops from current path point to next in list.\nRotates accoring to tangent between current path point and next *)\n\nDo[\nIf[escapePoints != {}, Break[]];\n\npt[] = path[[i, 1]](* x *);\npt[] = path[[i, 2]](* y *);\n\n\\[Theta] =\nArcTan[#[], #[]] &[{#[[i + 1, 1]] - #[[i, 1]], #[[i + 1,\n2]] - #[[i, 2]]}] &@path;\n\n(* updtae prior location list *)\nAppendTo[prior, Keys[Select[env, # == \"A\" &]]];\n\nlook;\n\n(* increments walk progress *)\nwalkProgress += 2,\n\n{i, 1, Length[path] - scale,(*1*)2(* step size -\nincrease for speed at loss of precision *)}\n]\n);\n\n\nWhen walking, there is a condition where if an escape point becomes available, it will break from walk and compute a new path with the nearest escape point as it’s target.\n\n(* escape points - those which are at the environment boundary *)\nescapePoints :=\nSelect[MemberQ[#, 1] || MemberQ[#, xLen] || MemberQ[#, yLen] &][\nsightEdges];\n\n\nThe procedure is the same as before. Once it has reached it’s destination, the agent is assumed to have escaped and the navigation component (below) of the program ends.\n\n(* procedure agent follows to explore and eventually escape from maze \\\n*)\nnavigate := (\n(* holds env arrays for post animation *)\nsessionData = {};\n(* initilize path *)\npath = {};\n(*infoData={};*)\n(* init. status *)\nstatus = \"Where am I?\";\n(* init. escape boole *)\nescape = False;\n(* begin navigaiton by looking straight ahead *)\nlook;\n(* init. prior locations *)\nprior = Keys[Select[env, # == \"A\" &]];\n\nWhile[escape == False,\nIf[(* exit if found *)# != {},\nstatus = \"Found escape location!\";\n(* set path to esacpe *)\n(* select closest escape point *)\nverticeTarget = Nearest[#1, verticeLocation, 1][];\n(* compute path *)\ncomputeOptimalPath;\n(* update status *)\nstatus =\nRow[{\"Walking to escape location\",\nDynamic[{walkProgress, (Length[path] - scale)}]}];\n(* initilize walk progress *)\nwalkProgress = 0;\n(* walk along path *)\nDo[\npt[] = path[[i, 1]];\npt[] = path[[i, 2]];\n\\[Theta] =\nArcTan[#[], #[]] &[{#[[i + 1, 1]] - #[[i, 1]], #[[i + 1,\n2]] - #[[i, 2]]}] &@path;\nlook;\nwalkProgress += 2,\n{i, 1, Length[path] - scale, 2}\n];\n(* once complete,\nagent has reached destination and thus escaped *)\nescape = True;\n(* update status *)\nstatus = \"Escaped!\",\n\n(* if exit is not visible, then: *)\n(* explore *)\n\n(* perfrom complete rotation while looking *)\nstatus = \"Looking for place to explore\";\nrotateSearch;\n\n(* search complete,\ncalculate paths from current position to valid targets *)\nstatus = \"Deciding where to go\";\n\n(* pathChoices holds target point and it's path score *)\npathChoices = {};\nDo[\n(* valid targets are held in opt *)\nverticeTarget = opt[[i]];\ncomputeOptimalPath;\n(* calculate path score and append to list for review *)\nAppendTo[\npathChoices, {verticeTarget,\npathLength[path] - backtrack[path]}],\n{i, 1, Length[opt]}\n];\n(* choose the target with maximal score and set as intended \\\ntarget *)\nverticeTarget = First[Last[SortBy[pathChoices, Last]]];\n\nstatus = \"I think I'll go there\";\n\n(* compute path to target *)\ncomputeOptimalPath;\nstatus =\nRow[{\"Walking\",\nDynamic[{walkProgress, (Length[path] - scale)}]}];\n\n(* moves agent along path,\nbreaks if exit location is discovered *)\nwalk\n\n] &[\n\n(* defines valid escape points *)\nescapePoints\n\n]\n];\n\n)",
null,
"",
null,
"While agent is navigating, evaluating infoView in a subsession will give snapshots of what the agent is doing in greater detail.\n\n## Conclusion\n\nWhile in need of much refinement, the program delivers good results when it works. The pathfinding algorithm has been a source of many error messages and will be the first thing to revise when I return to this project in the future. The program could be modified so that the agent searches for a key for instance before escaping or collects things in general (leading to knapsack problem). A multi-agent approach would also be interesting, especially if they could share knowledge of the maze during navigation and organize their paths efficiently. And of course, some of the methods from this project will be adapted towards traffic modelling, particularly with avoiding stopping vehicles and performing an overtake manoeuvre.\n\nUntil then, this project is being left as a functional prototype and I think I’ll go back and revise my prior work with the board game Monopoly.\n\nP.S Place notebook in a directory containing folders titled Maps and Output if using save/load features. The JSON file contains the maze shown at the start of this post.",
null,
"Attachments:",
null,
"Answer\n4 Replies\nSort By:\nPosted 3 years ago",
null,
"- another post of yours has been selected for the Staff Picks group, congratulations !We are happy to see you at the top of the \"Featured Contributor\" board. Thank you for your wonderful contributions, and please keep them coming!",
null,
"Answer\nPosted 3 years ago\n Very very nice code! Congrats! Thanks a lot for sharing!",
null,
"Answer\nPosted 3 years ago\n A-maze-ing ! (sorry, someone had to make it :-P)Your code is really impressive, and I will be happy to study it in details to learn the way it works !",
null,
"Answer\nPosted 3 years ago\n Very very cool! Thank you for share the idea and code in community. It looks like a model of simulating AGV (Autonomous Guide Vehicle) with laser guide.One idea, so far most of AGV guiding method is based on 2D maps. However, if it can be extend to 3D, that will win more advantage for safety. Attached two AGV patents show the horizontal maping + vertical mapping.",
null,
"Attachments:",
null,
"Answer"
] | [
null,
"http://community.wolfram.com//c/portal/getImageAttachment",
null,
"http://community.wolfram.com//c/portal/getImageAttachment",
null,
"http://community.wolfram.com//c/portal/getImageAttachment",
null,
"http://community.wolfram.com//c/portal/getImageAttachment",
null,
"http://community.wolfram.com//c/portal/getImageAttachment",
null,
"http://community.wolfram.com//c/portal/getImageAttachment",
null,
"http://community.wolfram.com//c/portal/getImageAttachment",
null,
"http://community.wolfram.com//c/portal/getImageAttachment",
null,
"http://community.wolfram.com//c/portal/getImageAttachment",
null,
"http://community.wolfram.com//c/portal/getImageAttachment",
null,
"http://community.wolfram.com//c/portal/getImageAttachment",
null,
"http://community.wolfram.com//c/portal/getImageAttachment",
null,
"http://community.wolfram.com//c/portal/getImageAttachment",
null,
"http://community.wolfram.com//c/portal/getImageAttachment",
null,
"http://community.wolfram.com//c/portal/getImageAttachment",
null,
"http://community.wolfram.com//c/portal/getImageAttachment",
null,
"https://community.wolfram.com/community-theme/images/attachment-paperclip.png",
null,
"https://community.wolfram.com/community-theme/images/common/checked.png",
null,
"http://community.wolfram.com//c/portal/getImageAttachment",
null,
"https://community.wolfram.com/community-theme/images/common/checked.png",
null,
"https://community.wolfram.com/community-theme/images/common/checked.png",
null,
"https://community.wolfram.com/community-theme/images/common/checked.png",
null,
"https://community.wolfram.com/community-theme/images/attachment-paperclip.png",
null,
"https://community.wolfram.com/community-theme/images/common/checked.png",
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.7973082,"math_prob":0.97371423,"size":21164,"snap":"2019-26-2019-30","text_gpt3_token_len":5602,"char_repetition_ratio":0.10510397,"word_repetition_ratio":0.12303907,"special_character_ratio":0.29970706,"punctuation_ratio":0.15884773,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.95852906,"pos_list":[0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48],"im_url_duplicate_count":[null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2019-07-21T21:58:20Z\",\"WARC-Record-ID\":\"<urn:uuid:fce4dfb6-da61-48e5-a621-9ca784466b02>\",\"Content-Length\":\"152404\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:1e037b83-020c-4ae2-b2a6-87c43e5b77d2>\",\"WARC-Concurrent-To\":\"<urn:uuid:563c963b-b3fb-4113-bdc7-ea8482708d7c>\",\"WARC-IP-Address\":\"140.177.204.58\",\"WARC-Target-URI\":\"https://community.wolfram.com/groups/-/m/t/872077\",\"WARC-Payload-Digest\":\"sha1:UFV52WDHWQLU5VZUO6JRLM6URQSAUVID\",\"WARC-Block-Digest\":\"sha1:I2GDIL4NNUDTRGR5P7RNLZLIMCS32W4M\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2019/CC-MAIN-2019-30/CC-MAIN-2019-30_segments_1563195527204.71_warc_CC-MAIN-20190721205413-20190721231413-00002.warc.gz\"}"} |
https://www.asvabtestbank.com/math-knowledge/practice-test/869205/5 | [
"## ASVAB Math Knowledge Practice Test 869205\n\n Questions 5 Topics Calculations, Factoring Quadratics, Inequalities, Operations Involving Monomials, Two Variables\n\n#### Study Guide\n\n###### Calculations\n\nThe circumference of a circle is the distance around its perimeter and equals π (approx. 3.14159) x diameter: c = π d. The area of a circle is π x (radius)2 : a = π r2.\n\nTo factor a quadratic expression, apply the FOIL (First, Outside, Inside, Last) method in reverse.\n\n###### Inequalities\n\nSolving equations with an inequality (<, >) uses the same process as solving equations with an equal sign. Isolate the variable that you're solving for on one wide of the equation and put everything else on the other side. The only difference is that your answer will be expressed as an inequality (x > 5) and not as an equality (x = 5).\n\n###### Operations Involving Monomials\n\nYou can only add or subtract monomials that have the same variable and the same exponent. However, you can multiply and divide monomials with unlike terms.\n\n###### Two Variables\n\nWhen solving an equation with two variables, replace the variables with the values given and then solve the now variable-free equation. (Remember order of operations, PEMDAS, Parentheses, Exponents, Multiplication/Division, Addition/Subtraction.)"
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.89436954,"math_prob":0.9970375,"size":1127,"snap":"2020-24-2020-29","text_gpt3_token_len":260,"char_repetition_ratio":0.13268033,"word_repetition_ratio":0.0,"special_character_ratio":0.22537711,"punctuation_ratio":0.14285715,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.99927574,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2020-07-13T09:15:18Z\",\"WARC-Record-ID\":\"<urn:uuid:33318f42-6aae-4905-88d9-179b13f0d148>\",\"Content-Length\":\"10800\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:96dfd304-1a86-4abe-9ba3-068a381593b5>\",\"WARC-Concurrent-To\":\"<urn:uuid:8019f852-0ed9-48c7-b42b-da0ce241e3cd>\",\"WARC-IP-Address\":\"68.183.116.70\",\"WARC-Target-URI\":\"https://www.asvabtestbank.com/math-knowledge/practice-test/869205/5\",\"WARC-Payload-Digest\":\"sha1:65S6G6TOV64ZCPAMJCDRFN6AZCDFN4XH\",\"WARC-Block-Digest\":\"sha1:D5MCHQCXWCI7XSQJGRCTOOCFWNISZ7S6\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2020/CC-MAIN-2020-29/CC-MAIN-2020-29_segments_1593657143354.77_warc_CC-MAIN-20200713064946-20200713094946-00467.warc.gz\"}"} |
https://www.indiabix.com/civil-engineering/water-supply-engineering/092007 | [
"# Civil Engineering - Water Supply Engineering\n\n### Exercise :: Water Supply Engineering - Section 1\n\n31.\n\nAsbestos pipes are\n\n A. light in weight and easy to transport B. highly resistant to corrosion C. high flexible to accommodate deflection upto 12° D. very much smooth and hydraulically efficient E. all the above.\n\nExplanation:\n\nNo answer description available for this question. Let us discuss.\n\n32.\n\nThe maximum depth of sedimentation tanks is limited to\n\n A. 2 m B. 3 m C. 4 m D. 5 m E. 6 m.\n\nExplanation:\n\nNo answer description available for this question. Let us discuss.\n\n33.\n\nBy boiling water, hardness can be removed if it is due to\n\n A. calcium sulphate B. magnesium sulphate C. calcium nitrate D. calcium bicarbonate E. none of these.\n\nExplanation:\n\nNo answer description available for this question. Let us discuss.\n\n34.\n\nQ is the discharge from an unconfined tube well with depression head s through its pipe of radius rw. If the radius of influence is R, the length of the required strainer, is\n\n A.",
null,
"B.",
null,
"C.",
null,
"D.",
null,
"Explanation:\n\nNo answer description available for this question. Let us discuss.\n\n35.\n\nFor determining the velocity of flow of underground water, the most commonly used non-empirical formula is\n\n A. Darcy's formula B. Slichter's formula C. Hazen's formula D. Lacy's formula."
] | [
null,
"https://www.indiabix.com/_files/images/civil-engineering/water-supply-engineering/208-10.85-1.png",
null,
"https://www.indiabix.com/_files/images/civil-engineering/water-supply-engineering/208-10.85-2.png",
null,
"https://www.indiabix.com/_files/images/civil-engineering/water-supply-engineering/208-10.85-3.png",
null,
"https://www.indiabix.com/_files/images/civil-engineering/water-supply-engineering/208-10.85-4.png",
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.73057115,"math_prob":0.69992065,"size":657,"snap":"2022-27-2022-33","text_gpt3_token_len":161,"char_repetition_ratio":0.17457886,"word_repetition_ratio":0.017857144,"special_character_ratio":0.25114155,"punctuation_ratio":0.17322835,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.97603345,"pos_list":[0,1,2,3,4,5,6,7,8],"im_url_duplicate_count":[null,4,null,4,null,4,null,4,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2022-08-20T06:40:03Z\",\"WARC-Record-ID\":\"<urn:uuid:e74f67f7-384f-4195-8077-1e485b6a7041>\",\"Content-Length\":\"36267\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:23f3233f-5be5-4d4d-a1fe-ce9aec0f1a51>\",\"WARC-Concurrent-To\":\"<urn:uuid:afbd3700-34e8-4905-b495-9b75531d2bdb>\",\"WARC-IP-Address\":\"35.244.11.196\",\"WARC-Target-URI\":\"https://www.indiabix.com/civil-engineering/water-supply-engineering/092007\",\"WARC-Payload-Digest\":\"sha1:CHLZYSDRLJHEZB6ITYRRJOKE3UHYM5IV\",\"WARC-Block-Digest\":\"sha1:6DT2EMFTFINR23FW3AGZLGULV6ULCHPD\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2022/CC-MAIN-2022-33/CC-MAIN-2022-33_segments_1659882573908.30_warc_CC-MAIN-20220820043108-20220820073108-00129.warc.gz\"}"} |
https://www.physicsforums.com/threads/i-want-to-smooth-this-function-plot.1004626/ | [
"# I want to smooth this function plot\n\n• B\nHi,\nI have the following function, which is computed by: (x+n)/(x+y+n+m),\nwhere x, y are real numbers\nn, m are natural numbers",
null,
"What techniques I can use to smooth the function preventing it to jump up or down at an early stage.\n\nThanks\n\nOffice_Shredder\nStaff Emeritus\nGold Member\nI'm confused, your axis on the bottom is labeled as T, what does that have to do with your function?\n\nI kind of assumed x and y were both inputs into your function, so I'm confused how you graphed it like this in general.\n\n•",
null,
"I'm confused, your axis on the bottom is labeled as T, what does that have to do with your function?\n\nI kind of assumed x and y were both inputs into your function, so I'm confused how you graphed it like this in general.\nThank you. T represents the time. It seems that n increases quickly in the early timesteps. I am still thinking of ways to use T in the formula.\n\njbriggs444\nHomework Helper\nThank you. T represents the time. It seems that n increases quickly in the early timesteps. I am still thinking of ways to use T in the formula.\nYou have still not told us what it is that you have graphed.\n\n•",
null,
"Mark44\nMentor\nThe graph in post #1 makes no sense given your formula. The labels on the graph are C and T, but the formula appears to be a function of x and y, as well as m and n.\n\nDisregarding the m and n terms for the moment, if you have ##f(x, y) = \\frac x {x + y}##, the graph will be a surface in three dimensions, with a discontinuity along the line y = -x.\n\nLast edited:\n•",
null,
"fresh_42\nMentor\nThe formula, as well as the graph, are already smooth within their domain.\n\n•",
null,
"Thank you. Yes, I just want to slow down the jump at the beginning.\n\nberkeman\nMentor\nThank you. Yes, I just want to slow down the jump at the beginning.\n\nx(T)\nn(T)\ny(T)\nm(T)\n\n•",
null,
"fresh_42\n\nx(T)\nn(T)\ny(T)\nm(T)\nx,n,y,m are variables that are changing over time\n\nberkeman\nMentor\nx,n,y,m are variables\nYou have a plot with them! Show us the funtion that you used to generate the plot please.\n\nYou have a plot with them! Show us the funtion that you used to generate the plot please.\nI construct the function but not fully sure if it is the best way to put all the variables together. I am building a simulation and trying to model human decisions but my model is very simple. The function is above with the question. x and y represent positive and negative personal experiences. n and m represent positive and negative opinions on social media. I assume the combination of all variables specifies the probability of consumption. Because at the beginning of the simulation, social media has 0 opinions, at step 1, multiple opinions are posted.\n\nfresh_42\nMentor\nYou have plotted a function ##F\\, : \\, \\mathbb{R}^+\\longrightarrow [0,1]## which means for any value ##T\\in \\mathbb{R}^+## you plotted a point ##(T,F(T)).## Our question is: What is ##F##? It depends only on ##T##, so how do we get from ##\\dfrac{x+n}{x+n+y+m}## to ##F(T)##?\n\nYou have plotted a function ##F\\, : \\, \\mathbb{R}^+\\longrightarrow [0,1]## which means for any value ##T\\in \\mathbb{R}^+## you plotted a point ##(T,F(T)).## Our question is: What is ##F##? It depends only on ##T##, so how do we get from ##\\dfrac{x+n}{x+n+y+m}## to ##F(T)##?\nF depends on all x,y,n,m, and T also.\n\nberkeman\nMentor\nSigh. Your obfuscations will get you nowhere...\n\nWhatever. If you don't like the first point, then just don't plot it. How's that for a solution?\n\n•",
null,
"•",
null,
""
] | [
null,
"https://www.physicsforums.com/attachments/1624952645544-png.285219/",
null,
"data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7",
null,
"data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7",
null,
"data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7",
null,
"data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7",
null,
"data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7",
null,
"data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7",
null,
"data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7",
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.94608694,"math_prob":0.883211,"size":553,"snap":"2021-31-2021-39","text_gpt3_token_len":140,"char_repetition_ratio":0.11293261,"word_repetition_ratio":0.877551,"special_character_ratio":0.2585895,"punctuation_ratio":0.12195122,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.98356307,"pos_list":[0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16],"im_url_duplicate_count":[null,1,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2021-09-21T11:20:28Z\",\"WARC-Record-ID\":\"<urn:uuid:d9ef2e19-d3e2-431c-b7be-66e5d2949202>\",\"Content-Length\":\"109660\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:afedd72a-3d41-4b7f-b071-60590c7fd713>\",\"WARC-Concurrent-To\":\"<urn:uuid:4837d693-9768-4ac4-9d0e-daf87a04232b>\",\"WARC-IP-Address\":\"104.26.14.132\",\"WARC-Target-URI\":\"https://www.physicsforums.com/threads/i-want-to-smooth-this-function-plot.1004626/\",\"WARC-Payload-Digest\":\"sha1:PBWK5RR6KAPBBXCK33VB3A7WUVMPVUXM\",\"WARC-Block-Digest\":\"sha1:DSPBVZLX7VI22MQ5J3VMGP4QOXKRE2XQ\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2021/CC-MAIN-2021-39/CC-MAIN-2021-39_segments_1631780057202.68_warc_CC-MAIN-20210921101319-20210921131319-00537.warc.gz\"}"} |
https://studysoup.com/tsg/19248/fluid-mechanics-2-edition-chapter-4-problem-96p | [
"×\nGet Full Access to Fluid Mechanics - 2 Edition - Chapter 4 - Problem 96p\nGet Full Access to Fluid Mechanics - 2 Edition - Chapter 4 - Problem 96p\n\n×\n\n# Consider fully developed two-dimensional Poiseuille",
null,
"ISBN: 9780071284219 39\n\n## Solution for problem 96P Chapter 4\n\nFluid Mechanics | 2nd Edition\n\n• Textbook Solutions\n• 2901 Step-by-step solutions solved by professors and subject experts\n• Get 24/7 help from StudySoup virtual teaching assistants",
null,
"Fluid Mechanics | 2nd Edition\n\n4 5 1 387 Reviews\n17\n0\nProblem 96P\n\nProblem 96P\n\nConsider fully developed two-dimensional Poiseuille flow—flow between two infinite parallel plates separated by distance h,with both the top plate and bottom plate stationary, and a forced pressure gradient dP/dxdriving the flow as illustrated in Fig. P11–48. (dP/dxis constant and negative.)",
null,
"FIGURE P11-48\n\nThe flow is steady, incompressible, and two-dimensional in the xy-plane. The velocity components are given by",
null,
"where μ is the fluid’s viscosity. Is this flow rotational or irrotational? If it is rotational, calculate the vorticity component in the z-direction. Do fluid particles in this flow rotate clockwise or counterclockwise?\n\nStep-by-Step Solution:\n\nStep 1 of 4:\n\nConsider the steady flow in two-dimensional xy plane. The flow is also considered as Poiseuille flow. It happens between two infinitely long parallel plates. The distance between the two plates is h. And the flow is stationary at the plates. The velocity field components are given by",
null,
"=",
null,
"----(1)\n\nWhere",
null,
"is the fluid’s viscosity",
null,
"is the pressure gradient.",
null,
"= 0 ------(2)\n\nTo find whether the flow is rotational or irrotational.\n\nStep 2 of 4\n\nStep 3 of 4\n\n##### ISBN: 9780071284219\n\nFluid Mechanics was written by and is associated to the ISBN: 9780071284219. This textbook survival guide was created for the textbook: Fluid Mechanics, edition: 2. The answer to “Consider fully developed two-dimensional Poiseuille flow—flow between two infinite parallel plates separated by distance h,with both the top plate and bottom plate stationary, and a forced pressure gradient dP/dxdriving the flow as illustrated in Fig. P11–48. (dP/dxis constant and negative.) FIGURE P11-48The flow is steady, incompressible, and two-dimensional in the xy-plane. The velocity components are given by where ? is the fluid’s viscosity. Is this flow rotational or irrotational? If it is rotational, calculate the vorticity component in the z-direction. Do fluid particles in this flow rotate clockwise or counterclockwise?” is broken down into a number of easy to follow steps, and 90 words. This full solution covers the following key subjects: flow, fluid, plate, rotational, counterclockwise. This expansive textbook survival guide covers 15 chapters, and 1547 solutions. The full step-by-step solution to problem: 96P from chapter: 4 was answered by , our top Engineering and Tech solution expert on 07/03/17, 04:51AM. Since the solution to 96P from 4 chapter was answered, more than 671 students have viewed the full step-by-step answer.\n\nUnlock Textbook Solution"
] | [
null,
"https://studysoup.com/cdn/89cover_2610072",
null,
"https://studysoup.com/cdn/89cover_2610072",
null,
"https://lh3.googleusercontent.com/XxMQzubvKRiqbR3zlWNmctevo27Owb7VCRULQDLF-GOIzJ1CYmaehgYTQw1Sa_Zp10jbjzDqfAI3MPZGWjdX2VkJ2TWfqg6HLO6jPINtPM2xN_Gpi5uVa1wGtCLSFC7P1TttN1Ph",
null,
"https://lh4.googleusercontent.com/tpTrD00J5l08ynCyUDxEeO79i6F4zg4Xyi0aXqfgWmWiKLSeSpsYeE0VIAX50MGHVB_55KCXVEjveTnybqN60QLEAWVR0DP0TdYZpQfQykkute8PyEbZaxVSGEAz7mUPYtip3vfd",
null,
"https://chart.googleapis.com/chart",
null,
"https://chart.googleapis.com/chart",
null,
"https://chart.googleapis.com/chart",
null,
"https://chart.googleapis.com/chart",
null,
"https://chart.googleapis.com/chart",
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.88559425,"math_prob":0.7297512,"size":1083,"snap":"2021-21-2021-25","text_gpt3_token_len":247,"char_repetition_ratio":0.14272475,"word_repetition_ratio":0.0,"special_character_ratio":0.21421976,"punctuation_ratio":0.10552764,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9846872,"pos_list":[0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18],"im_url_duplicate_count":[null,null,null,null,null,3,null,3,null,null,null,null,null,null,null,null,null,null,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2021-05-16T20:26:41Z\",\"WARC-Record-ID\":\"<urn:uuid:2d3a4c2b-f5b1-4755-bf27-c4ca1dace464>\",\"Content-Length\":\"94563\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:8c8dbf01-f307-47eb-8dcf-6e5a10328eb7>\",\"WARC-Concurrent-To\":\"<urn:uuid:a2b2fff1-32fe-4020-b59c-de0749c9af1b>\",\"WARC-IP-Address\":\"54.189.254.180\",\"WARC-Target-URI\":\"https://studysoup.com/tsg/19248/fluid-mechanics-2-edition-chapter-4-problem-96p\",\"WARC-Payload-Digest\":\"sha1:YQK6ELAD6QNMDGYUCSFGZZNSBGJFE7UG\",\"WARC-Block-Digest\":\"sha1:T5WAPNI2SQ52FDWA5WDWS7XHVV6VX6IG\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2021/CC-MAIN-2021-21/CC-MAIN-2021-21_segments_1620243989914.60_warc_CC-MAIN-20210516201947-20210516231947-00461.warc.gz\"}"} |
https://bugsfixing.com/solved-how-do-i-stop-a-user-from-leaving-time-field-empty/ | [
"# [SOLVED] How do I stop a user from leaving time field empty?\n\n## Issue\n\nThe problem I’m having is when a user skips over cycle time, even with the required field validator in place it allows to to still submit and crash the page. I tried setting an initial value but that didn’t work.\n\n``````<div class=\"col-lg-4\" style=\"text-align: left;\">\n<label for=\"txtCycle_Time\">Cycle Time (format mm:ss) :</label>\n<asp:TextBox ID=\"txtCycle_Time\" MaxLength=\"5\" CssClass=\"form-control\" runat=\"server\"></asp:TextBox>\n<asp:RequiredFieldValidator ID=\"txtCycle_Time_RequiredFieldValidator\" runat=\"server\" InitialValue=\"00:00\" Text=\"Please Enter Cycle Time\" ControlToValidate=\"txtCycle_Time\" ValidationGroup=\"Input\" Font-Italic=\"True\" ForeColor=\"Red\" />\n</div>\n``````\n``````Dim Cycle_Time_Sec As Integer = 0\nDim My_Time As String = \"\"\nMy_Time = txtCycle_Time.Text\nDim Min As String = My_Time.Substring(0, 2)\nDim Sec As String = My_Time.Substring(3, 2)\nCycle_Time_Sec = Min * 60 + Sec\n``````\n\n## Solution\n\nWrote this to fix the issue, now form works as intended.\n\n`````` If (txtCycle_Time.Text.Trim = \"__:__\" Or txtCycle_Time.Text.Trim = \"__:__ AM\"\nOr txtCycle_Time.Text.Trim = \"__:__ PM\") Then ScriptManager.RegisterStartupScript(Me, Me.GetType(), \"Cycle_Time_Error\", \"Cycle_Time_Error();\", True)\nExit Sub\nEnd If\n``````"
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.62338376,"math_prob":0.4701103,"size":1513,"snap":"2022-40-2023-06","text_gpt3_token_len":412,"char_repetition_ratio":0.15241882,"word_repetition_ratio":0.0,"special_character_ratio":0.26040977,"punctuation_ratio":0.15226337,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.95355004,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2023-02-03T16:51:54Z\",\"WARC-Record-ID\":\"<urn:uuid:f9839ce7-f9bf-42c2-b20e-5076b101d40f>\",\"Content-Length\":\"48532\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:a1ffbaf0-4cae-407c-a279-9ea6ea41fccb>\",\"WARC-Concurrent-To\":\"<urn:uuid:37cec99e-588d-484c-8097-1df0f06f2c75>\",\"WARC-IP-Address\":\"104.21.1.150\",\"WARC-Target-URI\":\"https://bugsfixing.com/solved-how-do-i-stop-a-user-from-leaving-time-field-empty/\",\"WARC-Payload-Digest\":\"sha1:DRZK7LXHOH6F2PSVOW3ENWWRMLLNXY23\",\"WARC-Block-Digest\":\"sha1:QUIEHP6M5SDXVIAHVBATXKD3DNINXQKC\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2023/CC-MAIN-2023-06/CC-MAIN-2023-06_segments_1674764500058.1_warc_CC-MAIN-20230203154140-20230203184140-00501.warc.gz\"}"} |
http://redwoodsmedia.com/finding-equivalent-fractions-worksheet/ | [
"Home - Finding Equivalent Fractions Worksheet\n\n# Finding Equivalent Fractions Worksheet\n\nHere is the Finding Equivalent Fractions Worksheet section. Here you will find all we have for Finding Equivalent Fractions Worksheet. For instance there are many worksheet that you can print here, and if you want to preview the Finding Equivalent Fractions Worksheet simply click the link or image and you will take to save page section.\n\nParing Fractions 4 Worksheets Free Printable Worksheets Free Fraction Worksheets Fraction Riddles 4th Grade Sheet 4a Equivalent Fraction Worksheets 9 Worksheets On Simplifying Fractions For 6th Graders Free Printable Fraction Worksheets Fraction Riddles Harder 3rd Grade Fractions Worksheets & Free Printables Free Worksheets With Equivalent Fractionsml In Ykodosegubthub Equivalent Fraction Worksheets 6th Grade Math Equivalent Fractions Anchor Chart 4th Grade Year 5 And 6 Pare Fractions Sheet 1 Worksheet Activity Equivalent Fraction Worksheets 6th Grade Math 9 Worksheets On Simplifying Fractions For 6th Graders Equivalent Fraction Worksheets Third Grade Math Fractions Worksheets Nice 27 Best Fraction Greater Than Less Than Worksheets Math Aids."
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.76071286,"math_prob":0.888749,"size":1130,"snap":"2019-51-2020-05","text_gpt3_token_len":222,"char_repetition_ratio":0.3170515,"word_repetition_ratio":0.08805031,"special_character_ratio":0.16283186,"punctuation_ratio":0.029940119,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9910498,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2020-01-23T11:30:00Z\",\"WARC-Record-ID\":\"<urn:uuid:2b9f4f71-b51e-4523-9b48-05053a22a034>\",\"Content-Length\":\"38412\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:0b91122c-5676-41da-a76d-3225a1765e97>\",\"WARC-Concurrent-To\":\"<urn:uuid:59b02f22-1206-458a-b380-55dec6ee7e87>\",\"WARC-IP-Address\":\"104.24.99.31\",\"WARC-Target-URI\":\"http://redwoodsmedia.com/finding-equivalent-fractions-worksheet/\",\"WARC-Payload-Digest\":\"sha1:UYFKLL5ZHR7GWEQLAP2DDV6J5RR3PGR5\",\"WARC-Block-Digest\":\"sha1:6IV7T3J3B47Q5T75Y6ARQFTV4ATJUCLN\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2020/CC-MAIN-2020-05/CC-MAIN-2020-05_segments_1579250610004.56_warc_CC-MAIN-20200123101110-20200123130110-00446.warc.gz\"}"} |
http://hwiegman.home.xs4all.nl/vb3-man/html/edn5410.html | [
"Erase Statement\n\nSee Also Example\n\nReinitializes the elements of fixed arrays and deallocates dynamic-array storage space.\n\nSyntax\n\nErase arrayname [, arrayname] . . .\n\nRemarks\n\nThe argument arrayname is the name of the array to be erased. It is important to know whether an array is fixed (ordinary) or dynamic because Erase behaves differently depending on the type of array. For fixed arrays, no memory is recovered. Erase sets the elements of a fixed array as follows:\n\n Type of array Effect of Erase on fixed-array elements\n\n Fixed numeric array Sets each element to zero Fixed string array (variable-length) Sets each element to zero-length (\"\") Fixed string array (fixed-length) Sets each element to zero Fixed Variant array Sets each element to Empty Array of user-defined types Sets each element as if it were a separate variable Array of objects Sets each element to the special value Nothing\n\nFor dynamic arrays, Erase frees the memory used by the array. Before your program can refer to the dynamic array again, it must redeclare the array variable's dimensions using a ReDim statement.\n\nSee Also\n\nDim Statement\n\nReDim Statement\n\nErase Statement Example\n\nIn this example, a two-dimensional array is created, filled, and erased. When the Erase statement is executed, zeros replace the contents of each element, but no memory space is recovered. To try this example, paste the code into the Declarations section of a form. Then press F5 and click the form.\n\nStatic Sub Form_Click ()\n\nDim I As Integer, J As Integer ' Declare Variables.\n\nDim Total As Long\n\nDim Matrix(50, 50) As Integer ' Create 2-D integer array.\n\nFor I = 1 To 50\n\nFor J = 1 To 50\n\nMatrix(I, J) = J ' Put some values into array.\n\nNext J\n\nNext I\n\nErase Matrix ' Erase array.\n\nTotal = 0 ' Initialize total counter.\n\nFor I = 1 To 50\n\nFor J = 1 To 50\n\nTotal = Total + Matrix(I, J) ' Sum elements after Erase\n\nNext J ' to make sure all are set\n\nNext I ' to zero.\n\nMsg = \"An array has been created, filled, and erased. When the \"\n\nMsg = Msg & \"Erase statement was executed, zeros replaced the \"\n\nMsg = Msg & \"previous contents of each element. The total of \"\n\nMsg = Msg & \"all elements is now \" & Total & \", \"\n\nMsg = Msg & \"demonstrating that all elements have been cleared.\"\n\nMsgBox Msg ' Display message.\n\nEnd Sub"
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.77806896,"math_prob":0.89396185,"size":2224,"snap":"2021-21-2021-25","text_gpt3_token_len":549,"char_repetition_ratio":0.15405406,"word_repetition_ratio":0.08915663,"special_character_ratio":0.2522482,"punctuation_ratio":0.09647059,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9834579,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2021-06-24T14:16:33Z\",\"WARC-Record-ID\":\"<urn:uuid:7213147a-9c4b-4288-9f39-e57eaedb3ae6>\",\"Content-Length\":\"24819\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:2bd849af-5816-4037-ac9e-3277798488f2>\",\"WARC-Concurrent-To\":\"<urn:uuid:8a79f712-b230-4909-8982-55baeadbe16b>\",\"WARC-IP-Address\":\"194.109.6.91\",\"WARC-Target-URI\":\"http://hwiegman.home.xs4all.nl/vb3-man/html/edn5410.html\",\"WARC-Payload-Digest\":\"sha1:LZ4GPTQLWLCSKDCV63G3H7ESZLI27SY5\",\"WARC-Block-Digest\":\"sha1:5VUB4Q66CG73IZXAISVLRC4MPAKAZEIZ\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2021/CC-MAIN-2021-25/CC-MAIN-2021-25_segments_1623488556133.92_warc_CC-MAIN-20210624141035-20210624171035-00186.warc.gz\"}"} |
https://coderanch.com/t/401943/java/isn-mod | [
"",
null,
"programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other all forums\nthis forum made possible by our volunteer staff, including ...\nMarshals:\n• Campbell Ritchie\n• Devaka Cooray\n• Knute Snortum\n• Paul Clapham\n• Tim Cooke\nSheriffs:\n• Liutauras Vilda\n• Jeanne Boyarsky\n• Bear Bibeault\nSaloon Keepers:\n• Tim Moores\n• Stephan van Hulst\n• Ron McLeod\n• Piet Souris\n• Frits Walraven\nBartenders:\n• Ganesh Patekar\n• Tim Holloway\n• salvin francis\n\n% isn't really \"mod\", is it?",
null,
"Ranch Hand\nPosts: 95\n•",
null,
"•",
null,
"•",
null,
"•",
null,
"Ok, this isn't a question so much as a discovery. I often see \"%\" referred to as the \"mod\" operator, but it isn't really - it is more like a remainder operator, since it gives negative values for negative \"dividends.\"\n\nRanch Hand\nPosts: 169\n•",
null,
"•",
null,
"•",
null,
"•",
null,
"Sorry, I see no reason why the number theory modulo operator may not return negative values ...\n\nRanch Hand\nPosts: 1780\n•",
null,
"•",
null,
"•",
null,
"•",
null,
"That's because % *is* defined in Java as the remainder:\nremainder = a - (a/b)*b\nIf you don't want a negative mod, add the divisor to it when it is negative.\n\nSheriff",
null,
"Posts: 9099\n12\n•",
null,
"•",
null,
"•",
null,
"•",
null,
"Apparently modulo is defined differently in different languages. In comparing Python with C++, for example, we see the following:\n\nJava was, in many ways, modelled after C/C++ (to entice them to switch to Java).\n\nJeff Albertson\nRanch Hand\nPosts: 1780\n•",
null,
"•",
null,
"•",
null,
"•",
null,
"Quick, what's -1/2?\n\nTo summarize (I'm quoting the JSL, because I don't trust my memory:\n• \"Integer division rounds towards 0.\" (�15.17.2) (So -1/2 is 0, not -1)\n• \"The binary % operator is said to yield the remainder of its operands from an\n\n• implied division; the left-hand operand is the dividend and the right-hand operand\nis the divisor.\"\n\n\"The remainder operation for operands that are integers after binary numeric promotion\n(�5.6.2) produces a result value such that (a/b)*b+(a%b) is equal to a.\" (�15.17.3)\n\nRanch Hand\nPosts: 95\n•",
null,
"•",
null,
"•",
null,
"•",
null,
"Originally posted by Stuart Goss:\nSorry, I see no reason why the number theory modulo operator may not return negative values ...\n\nCommonly, modulo is defined as the remainder in division, but that isn't the formal mathematical definition. In number theory, modulo is defined by the divisibiliy of the difference of two values:\n\na and b are equal modulo c if |a-b| is divisible by c\nSo to find a mod c, convention has us find the smallest positive b that exists and satisfies the relationship.\n\n-12 mod 10, for instance, asks us to fill in the blank:\n-12=b (mod x) =>|-12 - b| is divisible by 10, and as small as positively possible\nand 8, not -2 is the solution. A matter of definition, I suppose, and nothing more, but the convention in math clearly doesn't match the convention in Java.\n\nOriginally posted by Marilyn de Queiroz:\nApparently modulo is defined differently in different languages. In comparing Python with C++, for example, we see the following:\n\nJava was, in many ways, modelled after C/C++ (to entice them to switch to Java).\n\nI can deal with the C/C++ convention, (and the Java one) but that python output is weird!\n\nOriginally posted by Jeff Albrechtsen:\nQuick, what's -1/2?\n\nTo summarize (I'm quoting the JSL, because I don't trust my memory:\n\n• \"Integer division rounds towards 0.\" (�15.17.2) (So -1/2 is 0, not -1)\n• \"The binary %\n\n• That's good to know.\n\nRanch Hand\nPosts: 95\n•",
null,
"•",
null,
"•",
null,
"•",
null,
"Java was, in many ways, modelled after C/C++ (to entice them to switch to Java).<hr></blockquote>\n\nI can deal with the C/C++ convention, (and the Java one) but that python output is weird!\n\nThat's good to know.\n\nOk - now that I look at it some more, I see that it actually does exactly what I would have expected, and it is still the c/++/java output that sticks out.\n\nauthor",
null,
"Posts: 4106\n24",
null,
"",
null,
"",
null,
"•",
null,
"•",
null,
"•",
null,
"•",
null,
"In terms of mathematical correctness, modular arithemetic is defined on a ring such that in the example -12 modulo 10, the class of numbers defined by -2 is congruent to the class of numbers defined by 8. Meaning on the ring 10, all arithmetic operations would be the same regardles of which number you chose, -2 or 8, for the operation\n\nJava picks the least most positive number for the ring, which is also what you commonly use to represent that class of numbers in mathematics, ie, -12, -2, 8, 18, and 28 on ring 10 would be represented as {8}.\n\nRanch Hand\nPosts: 95\n•",
null,
"•",
null,
"•",
null,
"•",
null,
"Originally posted by Scott Selikoff:\nIn terms of mathematical correctness, modular arithemetic is defined on a ring such that in the example -12 modulo 10, the class of numbers defined by -12 is congruent to the class of numbers defined by 8. Meaning on the ring 10, all arithmetic operations would be the same regardles of which number you chose, -2 or 8, for the operation\n\nAgreed\n\nJava picks the leastmost positive number for the ring, which is also what you commonly use to represent that class of numbers in mathematics, ie, -12, -2, 8, 18, and 28 on ring 10 would be represented as {8}.\n\nBut that's just the problem - it doesn't. On ring 2, returns negative one for all negative odd . Unless you are talking about a different way to get the congruence class than [code[-12 mod 10[/code]. It truly is returning the remainder, not the least positive member of the congruence class\n\nScott Selikoff\nauthor",
null,
"Posts: 4106\n24",
null,
"",
null,
"",
null,
"•",
null,
"•",
null,
"•",
null,
"•",
null,
"Unless you are talking about a different way to get the congruence class than [code[-12 mod 10[/code]. It truly is returning the remainder, not the least positive member of the congruence class\n\nYou're right, java always returns the remainder instead of modular arithmetic. For negative numbers, java returns the greatest negative congruent element, and for positive numbers, java returns the smallest positive congruent element.\n\nKeep in mind that in math, they are the exact same thing. In ring algebra, the congruence of two numbers implies equivalence. Ergo, -2 is 8, and you could write it as {-2} or {8}. Its like saying 5 is 5, in that particular arithmetic although the numbers are different they represent the same object, ie they point to the same numeric absolute even though they are represented differently. For example, there's a long standing argument that 0.9999999 (with 9's to infinity) is the same as 1. Numbers represent objects that can often not be expressed exactly in the real world such as trying to express PI in finite terms (although you can make a good stab at it by expressing it as a sequence).\n\nMath is often abstract, computers are not. There a tons of places where computers have to approximate things that in math you would not wish to do. If it was me, I probably would have coded % to return positive numbers such as the behavior of BigInteger.mod(), although I'm sure there's some old reason why it doesn't",
null,
"permaculture is largely about replacing oil with people. And one tiny ad: how do I do my own kindle-like thing - without amazon https://coderanch.com/t/711421/engineering/kindle-amazon"
] | [
null,
"https://www.coderanch.com/mooseImages/betaview/moosefly.gif",
null,
"https://www.coderanch.com/templates/default/images/rss.png",
null,
"https://www.coderanch.com/templates/default/betaview/images/plus-1-thumb.gif",
null,
"https://www.coderanch.com/templates/default/images/pie/give-pie-button.png",
null,
"https://www.coderanch.com/templates/default/betaview/images/quote_button.gif",
null,
"https://www.coderanch.com/templates/default/betaview/images/report_post.png",
null,
"https://www.coderanch.com/templates/default/betaview/images/plus-1-thumb.gif",
null,
"https://www.coderanch.com/templates/default/images/pie/give-pie-button.png",
null,
"https://www.coderanch.com/templates/default/betaview/images/quote_button.gif",
null,
"https://www.coderanch.com/templates/default/betaview/images/report_post.png",
null,
"https://www.coderanch.com/templates/default/betaview/images/plus-1-thumb.gif",
null,
"https://www.coderanch.com/templates/default/images/pie/give-pie-button.png",
null,
"https://www.coderanch.com/templates/default/betaview/images/quote_button.gif",
null,
"https://www.coderanch.com/templates/default/betaview/images/report_post.png",
null,
"https://www.coderanch.com/templates/default/betaview/images/staff-star.png",
null,
"https://www.coderanch.com/templates/default/betaview/images/plus-1-thumb.gif",
null,
"https://www.coderanch.com/templates/default/images/pie/give-pie-button.png",
null,
"https://www.coderanch.com/templates/default/betaview/images/quote_button.gif",
null,
"https://www.coderanch.com/templates/default/betaview/images/report_post.png",
null,
"https://www.coderanch.com/templates/default/betaview/images/plus-1-thumb.gif",
null,
"https://www.coderanch.com/templates/default/images/pie/give-pie-button.png",
null,
"https://www.coderanch.com/templates/default/betaview/images/quote_button.gif",
null,
"https://www.coderanch.com/templates/default/betaview/images/report_post.png",
null,
"https://www.coderanch.com/templates/default/betaview/images/plus-1-thumb.gif",
null,
"https://www.coderanch.com/templates/default/images/pie/give-pie-button.png",
null,
"https://www.coderanch.com/templates/default/betaview/images/quote_button.gif",
null,
"https://www.coderanch.com/templates/default/betaview/images/report_post.png",
null,
"https://www.coderanch.com/templates/default/betaview/images/plus-1-thumb.gif",
null,
"https://www.coderanch.com/templates/default/images/pie/give-pie-button.png",
null,
"https://www.coderanch.com/templates/default/betaview/images/quote_button.gif",
null,
"https://www.coderanch.com/templates/default/betaview/images/report_post.png",
null,
"https://www.coderanch.com/templates/default/betaview/images/staff-star.png",
null,
"https://coderanch.com/images/bumperStickers/16_eclipse.gif",
null,
"https://coderanch.com/images/bumperStickers/16_flex.png",
null,
"https://coderanch.com/images/bumperStickers/16_gwt.png",
null,
"https://www.coderanch.com/templates/default/betaview/images/plus-1-thumb.gif",
null,
"https://www.coderanch.com/templates/default/images/pie/give-pie-button.png",
null,
"https://www.coderanch.com/templates/default/betaview/images/quote_button.gif",
null,
"https://www.coderanch.com/templates/default/betaview/images/report_post.png",
null,
"https://www.coderanch.com/templates/default/betaview/images/plus-1-thumb.gif",
null,
"https://www.coderanch.com/templates/default/images/pie/give-pie-button.png",
null,
"https://www.coderanch.com/templates/default/betaview/images/quote_button.gif",
null,
"https://www.coderanch.com/templates/default/betaview/images/report_post.png",
null,
"https://www.coderanch.com/templates/default/betaview/images/staff-star.png",
null,
"https://coderanch.com/images/bumperStickers/16_eclipse.gif",
null,
"https://coderanch.com/images/bumperStickers/16_flex.png",
null,
"https://coderanch.com/images/bumperStickers/16_gwt.png",
null,
"https://www.coderanch.com/templates/default/betaview/images/plus-1-thumb.gif",
null,
"https://www.coderanch.com/templates/default/images/pie/give-pie-button.png",
null,
"https://www.coderanch.com/templates/default/betaview/images/quote_button.gif",
null,
"https://www.coderanch.com/templates/default/betaview/images/report_post.png",
null,
"https://www.coderanch.com/images/bunkhouse_smoke.gif",
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.91070396,"math_prob":0.8600994,"size":2250,"snap":"2019-26-2019-30","text_gpt3_token_len":608,"char_repetition_ratio":0.10017809,"word_repetition_ratio":0.16272967,"special_character_ratio":0.26755556,"punctuation_ratio":0.1400862,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9742203,"pos_list":[0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104],"im_url_duplicate_count":[null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,2,null,8,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,2,null,8,null,null,null,null,null,null,null,null,null,null,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2019-06-20T21:18:40Z\",\"WARC-Record-ID\":\"<urn:uuid:cd1a0ea1-ac98-404a-bcaa-25da0d38a1b3>\",\"Content-Length\":\"43860\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:3b69507b-a09d-4194-a303-b136a72b840b>\",\"WARC-Concurrent-To\":\"<urn:uuid:9619a616-9105-4266-8cdf-c6cd25b4d756>\",\"WARC-IP-Address\":\"204.144.184.130\",\"WARC-Target-URI\":\"https://coderanch.com/t/401943/java/isn-mod\",\"WARC-Payload-Digest\":\"sha1:P6RHVPZ3BFDLAJ33TCL5J2GHRAQTLD7C\",\"WARC-Block-Digest\":\"sha1:XDQE7FMHSTUD25FUE4YQ5LXW2XKLTIIH\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2019/CC-MAIN-2019-26/CC-MAIN-2019-26_segments_1560627999273.79_warc_CC-MAIN-20190620210153-20190620232153-00248.warc.gz\"}"} |
https://www.convertunits.com/from/kilogram/square+centimeter/to/dekabar | [
"## ››Convert kilogram/square centimetre to dekabar\n\n kilogram/square centimeter dekabar\n\nHow many kilogram/square centimeter in 1 dekabar? The answer is 10.197162129779.\nWe assume you are converting between kilogram/square centimetre and dekabar.\nYou can view more details on each measurement unit:\nkilogram/square centimeter or dekabar\nThe SI derived unit for pressure is the pascal.\n1 pascal is equal to 1.0197162129779E-5 kilogram/square centimeter, or 1.0E-6 dekabar.\nNote that rounding errors may occur, so always check the results.\nUse this page to learn how to convert between kilograms/square centimetre and dekabars.\nType in your own numbers in the form to convert the units!\n\n## ››Quick conversion chart of kilogram/square centimeter to dekabar\n\n1 kilogram/square centimeter to dekabar = 0.09807 dekabar\n\n10 kilogram/square centimeter to dekabar = 0.98067 dekabar\n\n20 kilogram/square centimeter to dekabar = 1.96133 dekabar\n\n30 kilogram/square centimeter to dekabar = 2.942 dekabar\n\n40 kilogram/square centimeter to dekabar = 3.92266 dekabar\n\n50 kilogram/square centimeter to dekabar = 4.90333 dekabar\n\n100 kilogram/square centimeter to dekabar = 9.80665 dekabar\n\n200 kilogram/square centimeter to dekabar = 19.6133 dekabar\n\n## ››Want other units?\n\nYou can do the reverse unit conversion from dekabar to kilogram/square centimeter, or enter any two units below:\n\n## Enter two units to convert\n\n From: To:\n\n## ››Definition: Dekabar\n\nThe SI prefix \"deka\" represents a factor of 101, or in exponential notation, 1E1.\n\nSo 1 dekabar = 101 bars.\n\nThe definition of a bar is as follows:\n\nThe bar is a measurement unit of pressure, equal to 1,000,000 dynes per square centimetre (baryes), or 100,000 newtons per square metre (pascals). The word bar is of Greek origin, báros meaning weight. Its official symbol is \"bar\"; the earlier \"b\" is now deprecated, but still often seen especially as \"mb\" rather than the proper \"mbar\" for millibars.\n\n## ››Metric conversions and more\n\nConvertUnits.com provides an online conversion calculator for all types of measurement units. You can find metric conversion tables for SI units, as well as English units, currency, and other data. Type in unit symbols, abbreviations, or full names for units of length, area, mass, pressure, and other types. Examples include mm, inch, 100 kg, US fluid ounce, 6'3\", 10 stone 4, cubic cm, metres squared, grams, moles, feet per second, and many more!"
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.7726839,"math_prob":0.98897177,"size":2561,"snap":"2022-05-2022-21","text_gpt3_token_len":714,"char_repetition_ratio":0.31716856,"word_repetition_ratio":0.021563342,"special_character_ratio":0.24209294,"punctuation_ratio":0.1368421,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.98738855,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2022-05-25T00:06:04Z\",\"WARC-Record-ID\":\"<urn:uuid:6962b939-3e20-464f-b6b9-e33f18a52d9b>\",\"Content-Length\":\"41964\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:1891da4b-b762-4229-9a7a-4cf65f411d43>\",\"WARC-Concurrent-To\":\"<urn:uuid:e76d311e-90ec-47e8-8e8a-78fba9bbd3f5>\",\"WARC-IP-Address\":\"3.213.84.236\",\"WARC-Target-URI\":\"https://www.convertunits.com/from/kilogram/square+centimeter/to/dekabar\",\"WARC-Payload-Digest\":\"sha1:QZGSZG6YCVPH7TVXQDNKSK5EHAS7V3YI\",\"WARC-Block-Digest\":\"sha1:3XCTTUMAKACCT2M32HHMDTIY4I3LGB5U\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2022/CC-MAIN-2022-21/CC-MAIN-2022-21_segments_1652662577757.82_warc_CC-MAIN-20220524233716-20220525023716-00172.warc.gz\"}"} |
https://www.jmp.com/de_at/learning-library/probabilities-and-distributions.html | [
"# JMP Learning Library\n\n## Probabilities and Distributions\n\n### Assessing Normality\n\nAssessing normality for a continuous (quantitative) variable\n\n###### JMP features demonstrated:\n\nAnalyze > Distribution, Normal Quantile Plot\n\n### Fitting Distributions\n\nFitting continuous or discrete distributions in the JMP Distribution platform.\n\n###### JMP features demonstrated:\n\nDistribution, Continuous Fit, Discrete Fit, Goodness of Fit Test\n\n### Finding Standardized Values (z-Scores)\n\nTwo methods for calculating standardized values (z-scores) in JMP.\n\n###### JMP features demonstrated:\n\nAnalyze > Distribution, Formula Editor\n\n### Finding the Area Under a Normal Curve\n\nFinding the area under the curve (cumulative probability) in JMP for one value or for multiple values of a normally distributed continuous variable.\n\n###### JMP features demonstrated:\n\nData Table, Formula Editor\n\n### Random Sampling and Random Data\n\nSelecting a random sample and generating random data in JMP.\n\n###### JMP features demonstrated:\n\nSubset, Formula Editor"
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.74357104,"math_prob":0.7121136,"size":933,"snap":"2022-05-2022-21","text_gpt3_token_len":187,"char_repetition_ratio":0.15069968,"word_repetition_ratio":0.05,"special_character_ratio":0.16184351,"punctuation_ratio":0.114285715,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9819125,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2022-05-17T21:51:31Z\",\"WARC-Record-ID\":\"<urn:uuid:ab534868-4361-4f36-81f6-f85a5f65b125>\",\"Content-Length\":\"89304\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:741b6b88-0933-4913-88c1-33f08683f876>\",\"WARC-Concurrent-To\":\"<urn:uuid:936073d5-73f3-4b2e-bdd9-ba2c9cac2d39>\",\"WARC-IP-Address\":\"23.77.255.222\",\"WARC-Target-URI\":\"https://www.jmp.com/de_at/learning-library/probabilities-and-distributions.html\",\"WARC-Payload-Digest\":\"sha1:S6GSJKFV3NBN4CXJSGAKULVI5SAI2S2U\",\"WARC-Block-Digest\":\"sha1:AUTJHPFNHDIY537H2ZMJ3MS3Z2WXQPQ4\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2022/CC-MAIN-2022-21/CC-MAIN-2022-21_segments_1652662520817.27_warc_CC-MAIN-20220517194243-20220517224243-00201.warc.gz\"}"} |
https://ewiringdiagram.herokuapp.com/post/circuit-diagram-of-full-adder-pdf | [
"# CIRCUIT DIAGRAM OF FULL ADDER PDF",
null,
"[PDF]\nPropagation Delay, Circuit Timing & Adder Design\n5.2.1 Decomposed Full-Adder 8.3 Gate Delays and Timing Diagrams. January 25, 2012 ECE 152A - Digital Design Principles 6 Properties of Digital Integrated Circuits test circuit, half-adder, full adder and two-bit ripple carry adder. January 25, 2012 ECE 152A - Digital Design Principles 49\nFull Adder Circuit Diagram - Theorycircuit\nThe full adder circuit diagram add three binary bits and gives result as Sum, Carry out. It can be used in many applications like, Encoder, Decoder, BCD system, Binary calculation, address coder etc., the basic binary adder circuit classified into two categories they are Half Adder Full Adder Here three input and two output Full adder circuit diagram explained with logic gates circuit and\nFull-Adder Circuit, The Schematic Diagram and How It Works\nSep 23, 2019Full-adder circuit is one of the main element of arithmetic logic unit. It is the full-featured 1-bit (binary-digit) addition machine that can be assembled to construct a multi-bit adder machine. We can say it as a full-featured addition machine since it has “carry input” and a “carry-output”, in addition to the two 1-bit data inputs\nFull Adder Circuit: Theory, Truth Table & Construction\nWe add two half adder circuits with an extra addition of OR gate and get a complete full adder circuit. Full Adder Circuit Construction: Let’s see the block diagram, Full adder circuit construction is shown in the above block diagram, where two half adder circuits added together with a OR gate. The first half adder circuit is on the left side\nRelated searches for circuit diagram of full adder pdf",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
"",
null,
""
] | [
null,
"https://i0.wp.com/www.researchgate.net/profile/Shyam_Akashe/publication/260632359/figure/fig1/AS:414280903086081@1475783672415/Block-Diagram-of-basic-full-adder-circuit_Q320.jpg",
null,
"https://i0.wp.com/circuitglobe.com/wp-content/uploads/2015/12/HALF-ADDER-FULL-ADDER-FIG-2-compressor.jpg",
null,
"https://i0.wp.com/i.imgur.com/ANTFlCX.png",
null,
"https://i0.wp.com/www.theorycircuit.com/wp-content/uploads/2018/07/full-adder-circuit.png",
null,
"https://i0.wp.com/www.scienceabc.com/wp-content/uploads/2017/08/4-full-adder-4-bit-pannalel-adder.jpg",
null,
"https://i0.wp.com/www.gatevidyalay.com/wp-content/uploads/2018/06/Logic-Diagram-of-Full-Adder.png",
null,
"https://i0.wp.com/i.stack.imgur.com/dQfM1.jpg",
null,
"https://i0.wp.com/wiringelc.com/a/a/pa/patent-us20130093458-binary-half-adder-using-oscillators-drawing_half-adder-circuit-diagram_residential-electrical-panel-types-of-wiring-transformer-schematic-diagram-your-hou.png",
null,
"https://i0.wp.com/send104b.com/a/a/co/component-block-diagram-of-full-adder-blog-electronic-half-patent-ep0081052b1-and-operation-circuit-including-a-using-two_diagram-of-full-adder_electrical-contract-logic-gate-.png",
null,
"https://i0.wp.com/wiringelc.com/a/a/pa/patent-us7508233-full-adder-of-complementary-carry-logic-voltage-drawing_half-adder-circuit-diagram_circuit-diagram-of-full-wave-rectifier-op-amp-pin-best-electrical-wire-for-house-wi.png",
null,
"https://i0.wp.com/www.scienceabc.com/wp-content/uploads/2017/08/Full-adder-with-table-half-adder-full-adder-also-full-adder-box.jpg",
null,
"https://i0.wp.com/www.edutronic.co.uk/examples/s0110/fulladd.gif",
null,
"https://i0.wp.com/www.researchgate.net/profile/Ugur_Cini/publication/232908254/figure/download/fig12/AS:319361865797632@1453153210017/Source-coupled-full-adder-circuit-a-sum-generation-b-carry-out.png",
null,
"https://i0.wp.com/www.researchgate.net/publication/318300649/figure/fig14/AS:668886290681869@1536486327945/Cell-1-full-adder-5-14_Q320.jpg",
null,
"https://i0.wp.com/www.seekic.com/uploadfile/ic-circuit/s20097122161444.gif",
null,
"https://i0.wp.com/3.bp.blogspot.com/-Dv6XqmHKBvs/ULcPLIaWFPI/AAAAAAAAALM/iKe8VTMEQyY/s1600/fadder1.jpg",
null,
"https://i0.wp.com/www.researchgate.net/profile/Salah_Alkurwy/publication/261081088/figure/download/fig3/AS:793268774240259@1566141422624/Block-circuit-diagram-of-8-bit-Carry-Lookahead-adder.png",
null,
"https://i0.wp.com/wiringd.com/a/c/pa/patent-us7508233-full-adder-of-complementary-carry-logic-voltage-drawing_full-adder-diagram_diagram-of-house-wiring-photocell-wire-connection-electrical-switches-diagrams-drawi_850x996.png",
null,
"https://i0.wp.com/www.brainkart.com/media/extra/6lRZvHs.jpg",
null,
"https://i0.wp.com/i.stack.imgur.com/eWCWu.png",
null,
"https://i0.wp.com/learnabout-electronics.org/Digital/images/add-sub-8-bit.gif",
null,
"https://i0.wp.com/www.researchgate.net/profile/Soumen_Biswas4/publication/309312213/figure/download/fig2/AS:421735712464898@1477561037953/Circuit-Diagram-of-CPL-Full-Adder.ppm",
null,
"https://i0.wp.com/www.eeeguide.com/wp-content/uploads/2016/09/n-Bit-Parallel-Adder-1.jpg",
null,
"https://i0.wp.com/www.researchgate.net/profile/Gajula_Ramana_Murthy/publication/259011141/figure/fig1/AS:297294713901065@1447891991581/Proposed-adder-cell_Q320.jpg",
null,
"https://i0.wp.com/i.pinimg.com/originals/2d/2d/13/2d2d1322894f44de25e6de00fb550ff9.jpg",
null,
"https://i0.wp.com/www.tutorialspoint.com/digital_circuits/images/full_adder.jpg",
null,
"https://i0.wp.com/wiringelc.com/a/b/pa/patent-ep0178379a2-full-adder-circuit-with-sum-and-carry-drawing_full-adder-schematic_generator-circuit-diagram-model-a-wiring-need-common-schematic-symbols-maker-simple-electrical_1100x1691.png",
null,
"https://i0.wp.com/wiringelc.com/a/a/pa/patent-us8405421-nonvolatile-full-adder-circuit-google-patents-drawing_full-adder-schematic_schematic-diagram-electrical-wiring-humbucker-pickups-ansi-symbols-of-electric-circuit-pcb-i.png",
null,
"https://i0.wp.com/arith-matic.com/notebook/img/addition/half-adder.jpg",
null,
"https://i0.wp.com/www.researchgate.net/profile/Walid_Ibrahim2/publication/224247437/figure/fig6/AS:669024656576518@1536519316410/NAND-2-based-full-adder-FA-circuit.png",
null,
"https://i0.wp.com/wiringelc.com/a/c/ad/adder-and-multiplier-design-in-quantum-dot-cellular-automata-full-for-the-carry-flow-a-schematic-b-layout_full-adder-schematic_electrical-layout-diagram-circuit-solver-electronics-pr_850x636.gif",
null,
"https://i0.wp.com/linkdeln.com/a/a/pa/patent-us20130093458-binary-half-adder-using-oscillators-drawing_full-adder-using-2-half-adder_subwoofer-wiring-diagram-dual-2-ohm-rc-receiver-circuit-phase-shifter-using-op-amp-indu.png",
null,
"https://i0.wp.com/www.eeeguide.com/wp-content/uploads/2020/07/Half-Adder-and-Full-Adder-Circuit-008.jpg",
null,
"https://i0.wp.com/ricardolevinsmorales.com/wp-content/uploads/2018/09/1999-ford-explorer-wiring-diagram-pdf-full-size-of-wiring-diagram-1992-ford-ranger-wiring-diagram-inspirational-4r70w-shifting-wiring-help-14k-300x300.jpg",
null,
"https://i0.wp.com/www.researchgate.net/profile/Rajeev_Kumar35/publication/322947927/figure/fig1/AS:678255455637505@1538720110702/Functional-segment-diagram-Full-adder_Q320.jpg",
null,
"https://i0.wp.com/img.f-alpha.net/electronics/digital_electronics/adder/circuit_diagram_full_adder.gif",
null,
"https://i0.wp.com/img.f-alpha.net/electronics/digital_electronics/boolean_logic/circuit_diagram_half_adder.gif",
null,
"https://i1.wp.com/send104b.com/a/b/pa/patent-us4559609-full-adder-using-transmission-gates-google-drawing_cmos-gates_residential-electrical-wiring-diagram-example-hooking-batteries-in-series-npn-transistor-characteristics-_1100x1616.png",
null,
"https://i0.wp.com/www.eeeguide.com/wp-content/uploads/2020/07/Half-Adder-and-Full-Adder-Circuit-006.jpg",
null,
"https://i0.wp.com/www.researchgate.net/profile/Maurizio_Zamboni/publication/221911864/figure/fig3/AS:667853124542473@1536240001347/Full-adder-NCL-implementation-The-circuit-is-splitted-in-two-parts-following-the-two-bit.png",
null,
"https://i0.wp.com/wiringelc.com/a/d/pa/patent-us20130093458-binary-half-adder-using-oscillators-drawing_half-adder-circuit-diagram_residential-electrical-panel-types-of-wiring-transformer-schematic-diagram-your-hou_200x150.png",
null,
"https://i0.wp.com/www.researchgate.net/profile/Vazgen_Melikyan/publication/224596966/figure/download/fig1/AS:302682326749184@1449176498259/Mirror-full-adder-schematic-4.png",
null,
"https://i0.wp.com/arith-matic.com/notebook/img/addition/4bit-adder.jpg",
null,
"https://i0.wp.com/accendoreliability.com/wp-content/uploads/2017/07/2BitAdder-300x124.jpg",
null,
"https://i0.wp.com/wiringelc.com/a/c/pa/patent-us5406506-domino-adder-circuit-having-mos-transistors-in-drawing_full-adder-schematic_schematic-design-software-free-download-electrical-system-diagram-symbols-solar-_850x1249.png",
null,
"https://i0.wp.com/www.researchgate.net/profile/Adnan_Ghaderi/publication/303692204/figure/fig4/AS:667721381445635@1536208591192/Structure-of-Full-Adder-and-4-bits-Ripple-carry-adder.ppm",
null,
"https://i0.wp.com/www.seekic.com/uploadfile/ic-circuit/s201441321038541.gif",
null,
"https://i0.wp.com/wiringelc.com/a/c/pa/patent-us5905667-full-adder-using-nmos-transistor-google-patents-drawing_full-adder-schematic_fuse-diagram-resistor-variable-dc-power-supply-schematic-wiring-symbols-simpl_850x1249.png",
null,
"https://i0.wp.com/www.electronicshub.org/wp-content/uploads/2015/06/Full-subtractor-logic-circuit.jpg",
null,
"https://i0.wp.com/wiringelc.com/a/a/co/component-nand-gate-circuit-diagram-blog-of-electronic-half-and-or-invert-wikipedia-the-free-encyclopedia-pdf-2000px-cmos_half-adder-circuit-diagram_copper-wire-and-cable-basic.png",
null,
"https://i0.wp.com/1.bp.blogspot.com/-7AdCPn7L8DU/VQceIs7_4sI/AAAAAAAAAEY/XGodenS7qkU/s1600/SIMULATION.png",
null,
"https://i0.wp.com/www.researchgate.net/profile/Uzi_Even/publication/12084395/figure/fig5/AS:349567288659973@1460354744700/The-logic-circuit-corresponding-to-the-full-adder-of-Fig-6-Three-NOT-gates-shown-as_Q320.jpg",
null,
"https://i0.wp.com/www.researchgate.net/profile/Andrew_Adamatzky/publication/243333059/figure/fig9/AS:362375489310724@1463408457348/Trajectories-of-particles-implementing-1-bit-full-adder_Q320.jpg",
null,
"https://i0.wp.com/1.bp.blogspot.com/-O3nhOu4lsxc/ULYBfBZWDuI/AAAAAAAAAKw/mU5vaT9cUdY/s1600/fulladder1.jpg",
null,
"https://i0.wp.com/www.theorycircuit.com/wp-content/uploads/2018/04/half-adder-circuit.png",
null,
"https://i0.wp.com/download.e-bookshelf.de/download/0000/6295/98/L-X-0000629598-0001312433.XHTML/images/c01/nfg005.gif",
null,
"https://i0.wp.com/www.electronicshub.org/wp-content/uploads/2015/06/Half-Adder.jpg",
null,
"https://i0.wp.com/www.researchgate.net/profile/Omid_Sadeghi_Fathabadi/publication/271861150/figure/fig1/AS:654790430306307@1533125612781/a-Leakage-mechanisms-b-Shannon-based-adder-cell-of-3-c-Simulated-I-O-curves-of_Q320.jpg",
null,
"https://i0.wp.com/blog.oureducation.in/wp-content/uploads/2013/03/BCD-adder.jpg",
null,
"https://i0.wp.com/www.researchgate.net/profile/Soumen_Biswas4/publication/309312213/figure/fig1/AS:421735712464897@1477561037826/Construction-of-dual-logic-function_Q320.jpg",
null,
"https://i0.wp.com/www.brainkart.com/media/extra/KcW9fgG.jpg",
null,
"https://i0.wp.com/3.bp.blogspot.com/-xKqV0Pre6hM/Wk0Nya8LjvI/AAAAAAAAAB8/XXp3TVQeHwMXDGE3gXRigrlRUh0FZ84hwCLcBGAs/s1600/Interactive_Full_Adder.gif",
null,
"https://i0.wp.com/www.researchgate.net/profile/M_Priya3/publication/289772419/figure/download/fig3/AS:653315171966977@1532773883550/Full-adder-using-XNOR-XOR-gates-and-2-multiplexers-a-Block-diagram-b-Circuit-diagram.png",
null,
"https://i0.wp.com/www.researchgate.net/profile/Soumen_Biswas4/publication/309312213/figure/fig3/AS:421735712464899@1477561037995/Shannon-Based-Full-Adder_Q320.jpg",
null,
"https://i0.wp.com/www.theorycircuit.com/wp-content/uploads/2018/07/xor-gate-and-gate-or-gate-pinout.png",
null,
"https://i0.wp.com/i.stack.imgur.com/zHwlR.png",
null,
"https://i0.wp.com/wiringelc.com/a/b/va/varicap-varactor-diode-circuit-demo-youtube_diode-diagram_mic-preamp-circuit-diagram-am-receiver-block-electrical-fault-finding-the-electrician-wiring-for-house-humbucker-oscilloscope-a_1100x619.jpg",
null,
"https://i0.wp.com/i.stack.imgur.com/UNIyl.jpg",
null,
"https://i0.wp.com/www.eeeguide.com/wp-content/uploads/2020/07/Half-Adder-and-Full-Adder-Circuit-002.jpg",
null,
"https://i0.wp.com/www.researchgate.net/publication/318300649/figure/fig16/AS:668886290677779@1536486327998/Cell-3-full-adder-5-14_Q320.jpg",
null,
"https://i0.wp.com/www.researchgate.net/profile/Umer_Farooq24/publication/323576179/figure/fig11/AS:616314821423112@1523952312271/Schematic-circuit-diagram-of-hybrid-AND-gate_Q320.jpg",
null,
"https://i0.wp.com/cdn3.edurev.in/AllImages/original/ApplicationImages/Temp/1611939_88293ac5-406c-4ff9-aec7-0f3b105eb1d2_lg.PNG",
null,
"https://i0.wp.com/www.watelectronics.com/wp-content/uploads/Full-Subtractor-Circuit.jpg",
null,
"https://i0.wp.com/lucylimd.com/a/c/el/electric-bit-full-adder-truth-table-fileadder-network-sum-carry-svg-wikimedia-commons-circuit-2000px_block-diagram-of-full-adder_schematic-diagram-of-radio-electrical-wire-diagrams-house-wi_850x1518.png",
null,
"https://i0.wp.com/qph.fs.quoracdn.net/main-qimg-c4e1803817abadf8878308e3cbbd8ef1",
null,
"https://i0.wp.com/exploreroots.com/dc4_clip_image004.gif",
null,
"https://i0.wp.com/i.pinimg.com/originals/53/da/ce/53daceb9d7fe96341d92eb45410aa472.jpg",
null,
"https://i0.wp.com/www.researchgate.net/profile/Osvaldo_Agamennoni/publication/221922913/figure/download/fig5/AS:668677431111698@1536436531734/Mask-layout-of-the-CMOS-one-bit-full-adder-circuit.png",
null,
"https://i0.wp.com/www.researchgate.net/profile/Ahsan_Chowdhury/publication/221294480/figure/download/fig1/AS:668978456301576@1536508301669/1-A-reversible-full-adder-circuit-with-only-2-reversible-gates-ie-one-New-Gate-and.png",
null,
"https://i0.wp.com/4.bp.blogspot.com/-Vocx0uWgy1I/U8sx2yXpQUI/AAAAAAAAADM/y3otGjEpJYM/s1600/full_adder_with_pg.jpg",
null,
"https://i0.wp.com/linkdeln.com/a/a/pa/patent-us5905667-full-adder-using-nmos-transistor-google-patents-drawing_full-adder-schematic_electrical-schematic-symbols-chart-pcb-circuit-diagram-layout-drawing-simple.png",
null,
"https://i0.wp.com/www.researchgate.net/profile/Uma_Ramadass/publication/267296629/figure/fig5/AS:668437961519124@1536379437551/Logical-Delay-Model-for-Full-Adder-Circuit_Q320.jpg",
null,
"https://i0.wp.com/linkdeln.com/a/c/pa/patent-us6622927-low-voltage-thermostat-circuit-google-patentsuche-drawing_thermostat-circuit_2-bit-full-adder-circuit-microcontroller-parts-of-a-electric-radio-control-circ_850x1029.png",
null,
"https://i0.wp.com/www.researchgate.net/profile/Abdel_Hameed_Badawy/publication/319311813/figure/fig4/AS:667869478146057@1536243900693/depicts-a-schematic-of-the-proposed-full-adder-cell-The-initial-state-of-the-MTJ1-and.png",
null,
"https://i0.wp.com/research.burignat.eu/Reversible_Computing/2011_Burignat_Prototype_Cuccaro_Adder/im/2011_Burignat_Prototype_Cuccaro_Adder_Quantum_Diagram_Adder.jpg",
null,
"https://i0.wp.com/send104b.com/a/a/al/alu-bit-full-related-keywords-suggestions-subtractor-circuit-further-binary-adder-besides_ripple-adder_titanium-capacitor-series-and-parallel-circuit-diagram-strain-gauge-wiring.jpg",
null,
"https://i0.wp.com/www.researchgate.net/profile/Md_Islam29/publication/224585696/figure/fig4/AS:302660000469002@1449171175979/Block-diagram-of-a-4-bit-carry-skip-adder.png",
null,
"https://i0.wp.com/www.researchgate.net/profile/M_Priya3/publication/289772419/figure/fig2/AS:653315171950594@1532773883520/Full-adder-using-two-XNOR-gates-and-multiplexer-a-Block-diagram-b-Circuit-diagram_Q320.jpg",
null,
"https://i0.wp.com/www.exploreroots.com/dc12_clip_image004.gif",
null,
"https://i0.wp.com/www.anenglathi.com/wp-content/uploads/2018/10/house_wiring_circuit_diagram_pdf_new_resume_42_best_home_electrical_wiring_diagrams_full_hd_wallpaper_of_house_wiring_circuit_diagram_pdf_3.jpg",
null,
"https://i0.wp.com/wiringelc.com/a/d/pa/patent-us5905667-full-adder-using-nmos-transistor-google-patents-drawing_full-adder-schematic_electrical-schematic-symbols-chart-pcb-circuit-diagram-layout-drawing-simple_200x150.png",
null,
"https://i0.wp.com/img.autorepairmanuals.ws/images/2018/07/31/Hitachi_EX60-5_Circuit_Diagram_3.jpg",
null,
"https://i0.wp.com/2007.igem.org/wiki/images/c/c0/Half-adder.png",
null,
"https://i0.wp.com/www.seekic.com/uploadfile/ic-circuit/201441321349748.gif",
null,
"https://i0.wp.com/www.researchgate.net/profile/Ali_Peiravi/publication/221381046/figure/fig1/AS:669020873297936@1536518414907/CMOS-standard-28T-full-adder_Q320.jpg",
null,
"https://i0.wp.com/www.researchgate.net/profile/Jin_Fa_Lin/publication/3451532/figure/download/fig4/AS:349534141075471@1460346841875/MOS-circuit-schematic-design-of-the-CLRCL-full-adder.png",
null,
"https://i1.wp.com/lucylimd.com/a/b/pa/patent-us6098464-wheatstone-bridge-with-temperature-gradient-drawing_wheatstone-bridge-theory_npn-switch-circuit-tv-series-parallel-questions-simple-electrical-diagram-full-wave-recti_1100x1616.png",
null,
"https://i0.wp.com/www.ece.concordia.ca/~asim/COEN_6501/tools/vhdl_yawar-1.gif",
null,
"https://i0.wp.com/i.stack.imgur.com/UUul3.jpg",
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.84913856,"math_prob":0.8381472,"size":1846,"snap":"2020-34-2020-40","text_gpt3_token_len":434,"char_repetition_ratio":0.20032573,"word_repetition_ratio":0.03448276,"special_character_ratio":0.20855905,"punctuation_ratio":0.0922619,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9828636,"pos_list":[0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175,176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,192,193,194,195,196,197,198],"im_url_duplicate_count":[null,1,null,5,null,2,null,5,null,6,null,5,null,1,null,1,null,1,null,1,null,2,null,1,null,1,null,1,null,1,null,2,null,1,null,1,null,5,null,1,null,1,null,1,null,1,null,1,null,1,null,3,null,1,null,1,null,1,null,1,null,1,null,1,null,3,null,1,null,1,null,1,null,1,null,1,null,1,null,1,null,1,null,1,null,3,null,2,null,1,null,1,null,1,null,1,null,6,null,1,null,1,null,1,null,1,null,1,null,1,null,1,null,2,null,1,null,1,null,1,null,4,null,1,null,1,null,1,null,2,null,1,null,1,null,1,null,1,null,1,null,2,null,3,null,1,null,1,null,5,null,1,null,1,null,1,null,1,null,1,null,1,null,1,null,1,null,1,null,1,null,1,null,2,null,1,null,3,null,1,null,1,null,2,null,2,null,1,null,1,null,1,null,1,null,1,null,1,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2020-08-04T06:09:39Z\",\"WARC-Record-ID\":\"<urn:uuid:ce689508-0898-4309-8514-6f2c469520f6>\",\"Content-Length\":\"74398\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:315a0432-2740-464f-9abf-674f0bc589b7>\",\"WARC-Concurrent-To\":\"<urn:uuid:8a560c03-c91d-43ca-9952-68d7f3e3a405>\",\"WARC-IP-Address\":\"52.6.70.185\",\"WARC-Target-URI\":\"https://ewiringdiagram.herokuapp.com/post/circuit-diagram-of-full-adder-pdf\",\"WARC-Payload-Digest\":\"sha1:BWPDBAYS4GUKRDUSXJ5EDTIEPMMOJO5M\",\"WARC-Block-Digest\":\"sha1:II4ZOY6YGEZSMOAXOSQXED2KW7US4RUP\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2020/CC-MAIN-2020-34/CC-MAIN-2020-34_segments_1596439735860.28_warc_CC-MAIN-20200804043709-20200804073709-00503.warc.gz\"}"} |
http://jangorecki.gitlab.io/data.table/library/data.table/html/foverlaps.html | [
"foverlaps {data.table} R Documentation\n\n## Fast overlap joins\n\n### Description\n\nA fast binary-search based overlap join of two `data.table`s. This is very much inspired by `findOverlaps` function from the Bioconductor package `IRanges` (see link below under `See Also`).\n\nUsually, `x` is a very large data.table with small interval ranges, and `y` is much smaller keyed `data.table` with relatively larger interval spans. For a usage in `genomics`, see the examples section.\n\nNOTE: This is still under development, meaning it is stable, but some features are yet to be implemented. Also, some arguments and/or the function name itself could be changed.\n\n### Usage\n\n```foverlaps(x, y, by.x = if (!is.null(key(x))) key(x) else key(y),\nby.y = key(y), maxgap = 0L, minoverlap = 1L,\ntype = c(\"any\", \"within\", \"start\", \"end\", \"equal\"),\nmult = c(\"all\", \"first\", \"last\"),\nnomatch = getOption(\"datatable.nomatch\", NA),\nwhich = FALSE, verbose = getOption(\"datatable.verbose\"))\n```\n\n### Arguments\n\n `x, y` `data.table`s. `y` needs to be keyed, but not necessarily `x`. See examples. `by.x, by.y` A vector of column names (or numbers) to compute the overlap joins. The last two columns in both `by.x` and `by.y` should each correspond to the `start` and `end` interval columns in `x` and `y` respectively. And the `start` column should always be <= `end` column. If `x` is keyed, `by.x` is equal to `key(x)`, else `key(y)`. `by.y` defaults to `key(y)`. `maxgap` It should be a non-negative integer value, >= 0. Default is 0 (no gap). For intervals `[a,b]` and `[c,d]`, where `a<=b` and `c<=d`, when `c > b` or `d < a`, the two intervals don't overlap. If the gap between these two intervals is `<= maxgap`, these two intervals are considered as overlapping. Note: This is not yet implemented. `minoverlap` It should be a positive integer value, > 0. Default is 1. For intervals `[a,b]` and `[c,d]`, where `a<=b` and `c<=d`, when `c<=b` and `d>=a`, the two intervals overlap. If the length of overlap between these two intervals is `>= minoverlap`, then these two intervals are considered to be overlapping. Note: This is not yet implemented. `type` Default value is `any`. Allowed values are `any`, `within`, `start`, `end` and `equal`. The types shown here are identical in functionality to the function `findOverlaps` in the bioconductor package `IRanges`. Let `[a,b]` and `[c,d]` be intervals in `x` and `y` with `a<=b` and `c<=d`. For `type=\"start\"`, the intervals overlap iff `a == c`. For `type=\"end\"`, the intervals overlap iff `b == d`. For `type=\"within\"`, the intervals overlap iff `a>=c and b<=d`. For `type=\"equal\"`, the intervals overlap iff `a==c and b==d`. For `type=\"any\"`, as long as `c<=b and d>=a`, they overlap. In addition to these requirements, they also have to satisfy the `minoverlap` argument as explained above. NB: `maxgap` argument, when > 0, is to be interpreted according to the type of the overlap. This will be updated once `maxgap` is implemented. `mult` When multiple rows in `y` match to the row in `x`, `mult=.` controls which values are returned - `\"all\"` (default), `\"first\"` or `\"last\"`. `nomatch` When a row (with interval say, `[a,b]`) in `x` has no match in `y`, `nomatch=NA` (default) means `NA` is returned for `y`'s non-`by.y` columns for that row of `x`. `nomatch=NULL` (or `0` for backward compatibility) means no rows will be returned for that row of `x`. Use `options(datatable.nomatch=NULL)` to change the default value (used when `nomatch` is not supplied). `which` When `TRUE`, if `mult=\"all\"` returns a two column `data.table` with the first column corresponding to `x`'s row number and the second corresponding to `y`'s. when `nomatch=NA`, no matches return `NA` for `y`, and if `nomatch=NULL`, those rows where no match is found will be skipped; if `mult=\"first\" or \"last\"`, a vector of length equal to the number of rows in `x` is returned, with no-match entries filled with `NA` or `0` corresponding to the `nomatch` argument. Default is `FALSE`, which returns a join with the rows in `y`. `verbose` `TRUE` turns on status and information messages to the console. Turn this on by default using `options(datatable.verbose=TRUE)`. The quantity and types of verbosity may be expanded in future.\n\n### Details\n\nVery briefly, `foverlaps()` collapses the two-column interval in `y` to one-column of unique values to generate a `lookup` table, and then performs the join depending on the type of `overlap`, using the already available `binary search` feature of `data.table`. The time (and space) required to generate the `lookup` is therefore proportional to the number of unique values present in the interval columns of `y` when combined together.\n\nOverlap joins takes advantage of the fact that `y` is sorted to speed-up finding overlaps. Therefore `y` has to be keyed (see `?setkey`) prior to running `foverlaps()`. A key on `x` is not necessary, although it might speed things further. The columns in `by.x` argument should correspond to the columns specified in `by.y`. The last two columns should be the interval columns in both `by.x` and `by.y`. The first interval column in `by.x` should always be <= the second interval column in `by.x`, and likewise for `by.y`. The `storage.mode` of the interval columns must be either `double` or `integer`. It therefore works with `bit64::integer64` type as well.\n\nThe `lookup` generation step could be quite time consuming if the number of unique values in `y` are too large (ex: in the order of tens of millions). There might be improvements possible by constructing lookup using RLE, which is a pending feature request. However most scenarios will not have too many unique values for `y`.\n\n### Value\n\nA new `data.table` by joining over the interval columns (along with other additional identifier columns) specified in `by.x` and `by.y`.\n\nNB: When `which=TRUE`: `a)` `mult=\"first\" or \"last\"` returns a `vector` of matching row numbers in `y`, and `b)` when `mult=\"all\"` returns a data.table with two columns with the first containing row numbers of `x` and the second column with corresponding row numbers of `y`.\n\n`nomatch=NA or 0` also influences whether non-matching rows are returned or not, as explained above.\n\n`data.table`, http://www.bioconductor.org/packages/release/bioc/html/IRanges.html, `setNumericRounding`\n\n### Examples\n\n```require(data.table)\n## simple example:\nx = data.table(start=c(5,31,22,16), end=c(8,50,25,18), val2 = 7:10)\ny = data.table(start=c(10, 20, 30), end=c(15, 35, 45), val1 = 1:3)\nsetkey(y, start, end)\nfoverlaps(x, y, type=\"any\", which=TRUE) ## return overlap indices\nfoverlaps(x, y, type=\"any\") ## return overlap join\nfoverlaps(x, y, type=\"any\", mult=\"first\") ## returns only first match\nfoverlaps(x, y, type=\"within\") ## matches iff 'x' is within 'y'\n\n## with extra identifiers (ex: in genomics)\nx = data.table(chr=c(\"Chr1\", \"Chr1\", \"Chr2\", \"Chr2\", \"Chr2\"),\nstart=c(5,10, 1, 25, 50), end=c(11,20,4,52,60))\ny = data.table(chr=c(\"Chr1\", \"Chr1\", \"Chr2\"), start=c(1, 15,1),\nend=c(4, 18, 55), geneid=letters[1:3])\nsetkey(y, chr, start, end)\nfoverlaps(x, y, type=\"any\", which=TRUE)\nfoverlaps(x, y, type=\"any\")\nfoverlaps(x, y, type=\"any\", nomatch=NULL)\nfoverlaps(x, y, type=\"within\", which=TRUE)\nfoverlaps(x, y, type=\"within\")\nfoverlaps(x, y, type=\"start\")\n\n## x and y have different column names - specify by.x\nx = data.table(seq=c(\"Chr1\", \"Chr1\", \"Chr2\", \"Chr2\", \"Chr2\"),\nstart=c(5,10, 1, 25, 50), end=c(11,20,4,52,60))\ny = data.table(chr=c(\"Chr1\", \"Chr1\", \"Chr2\"), start=c(1, 15,1),\nend=c(4, 18, 55), geneid=letters[1:3])\nsetkey(y, chr, start, end)\nfoverlaps(x, y, by.x=c(\"seq\", \"start\", \"end\"),\ntype=\"any\", which=TRUE)\n```\n\n[Package data.table version 1.13.1 Index]"
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.73517346,"math_prob":0.9657089,"size":4684,"snap":"2020-45-2020-50","text_gpt3_token_len":1367,"char_repetition_ratio":0.14444445,"word_repetition_ratio":0.07212205,"special_character_ratio":0.29611444,"punctuation_ratio":0.20825335,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.994946,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2020-10-27T20:46:06Z\",\"WARC-Record-ID\":\"<urn:uuid:3d20f69b-1773-4346-a2ea-b9eb12f0e25d>\",\"Content-Length\":\"11187\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:89cdfa17-81f3-4a0e-9317-876cd3a28e2b>\",\"WARC-Concurrent-To\":\"<urn:uuid:5a05916e-fe2e-4f26-a281-3d258c8e0599>\",\"WARC-IP-Address\":\"35.185.44.232\",\"WARC-Target-URI\":\"http://jangorecki.gitlab.io/data.table/library/data.table/html/foverlaps.html\",\"WARC-Payload-Digest\":\"sha1:CGK5KUN7EYLVAIO35NW6TPV7RT5EAIBT\",\"WARC-Block-Digest\":\"sha1:IOUW5P4VRXG3HTOTSZQGWF2ZTN7SM5W7\",\"WARC-Identified-Payload-Type\":\"application/xhtml+xml\",\"warc_filename\":\"/cc_download/warc_2020/CC-MAIN-2020-45/CC-MAIN-2020-45_segments_1603107894759.37_warc_CC-MAIN-20201027195832-20201027225832-00139.warc.gz\"}"} |
https://wiki.haskell.org/index.php?title=Poor_man%27s_here_document&diff=prev&oldid=12547&printable=yes | [
"# Difference between revisions of \"Poor man's here document\"\n\n```main = do\ndoc <- here \"DATA\" \"Here.hs\" [(\"variable\",\"some\"),(\"substitution\",\"variables\")]\nputStrLn doc\nhtml <- here \"HTML\" \"Here.hs\" [(\"code\",doc)]\nputStrLn html\n\nhere tag file env = do\nlet (_,_:rest) = span (/=\"{- \"++tag++\" START\") (lines txt)\n(doc,_) = span (/=\" \"++tag++\" END -}\") rest\nreturn \\$ unlines \\$ map subst doc\nwhere\nsubst ('\\$':'(':cs) = case span (/=')') cs of\n(var,')':cs) -> maybe (\"\\$(\"++var++\")\") id (lookup var env) ++ subst cs\n_ -> '\\$':'(':subst cs\nsubst (c:cs) = c:subst cs\nsubst \"\" = \"\"\n\n{- DATA START\n\nthis is a poor man's here-document\n\nwith quotes \", and escapes \\,\nand line-breaks, and layout\nwithout escaping \\\" \\\\ \\n,\nwithout concatenation.\n\noh, and with \\$(variable) \\$(substitution), \\$(too).\n\nDATA END -}\n\n{- HTML START\n\n<html>"
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.6759577,"math_prob":0.9349649,"size":1482,"snap":"2022-05-2022-21","text_gpt3_token_len":448,"char_repetition_ratio":0.08930988,"word_repetition_ratio":0.103286386,"special_character_ratio":0.35357624,"punctuation_ratio":0.15328467,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9925456,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2022-05-27T18:04:16Z\",\"WARC-Record-ID\":\"<urn:uuid:b78b48d1-03bb-4e08-a742-97b0623c9c69>\",\"Content-Length\":\"22696\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:8e88127d-c00f-432f-a8af-bd1411f742c7>\",\"WARC-Concurrent-To\":\"<urn:uuid:0258a434-e6fe-4825-825a-01571f5133bc>\",\"WARC-IP-Address\":\"146.75.33.175\",\"WARC-Target-URI\":\"https://wiki.haskell.org/index.php?title=Poor_man%27s_here_document&diff=prev&oldid=12547&printable=yes\",\"WARC-Payload-Digest\":\"sha1:BJWZZ2AZNMCNGON3BH2NJQMM5XB7I6MU\",\"WARC-Block-Digest\":\"sha1:KPSNSBLQD2R4WAVNSM46NUL6JEBN2HSC\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2022/CC-MAIN-2022-21/CC-MAIN-2022-21_segments_1652662675072.99_warc_CC-MAIN-20220527174336-20220527204336-00466.warc.gz\"}"} |
https://mysqlpreacher.com/how-do-you-make-1n-h2so4/ | [
"Categories :\n\n## How do you make 1N H2SO4?\n\nIf you took 6.9 mL of concentrated sulfuric acid and diluted it to 250 mL, you would have a 1 N H2SO4 solution. (Important note: Always add the acid (or base) to water, in that order. Pour slowly with constant mixing.\n\n## Is there such a thing as normal and abnormal?\n\nIn simple terms, however, society at large often perceives or labels “normal” as “good,” and “abnormal” as “bad.” Being labeled as “normal” or “abnormal” can therefore have profound ramifications for an individual, such as exclusion or stigmatization by society.\n\nWhat is the normality of HCL?\n\nDilutions to Make a 1 Molar Solution\n\nConcentrated Reagents Density Normality (N)\nAmmonia 25% 0.910 13.4\nHydrochloric acid 36% 1.18 11.65\nHydrochloric acid 32% 1.16 10.2\nHydrofluoric acid 40% 1.13 22.6\n\n### How is equivalent weight calculated?\n\nThe equivalent weight of an element is its gram atomic weight divided by its valence (combining power). Some equivalent weights are: silver (Ag), 107.868 grams (g); magnesium (Mg), 24.312/2 g; aluminum (Al), 26.9815/3 g; and sulfur (S, in forming a sulfide), 32.064/2 g.\n\n### How do you make 0.1 N oxalic acid?\n\nNote: If anhydrous oxalic acid (COOH) is available then dissolve 4.5 g of the acid in one litre of distilled water to get 0.1 N oxalic acid solution. Add 13.16 g of NaOH (95% NaOH) in one litre distilled water and shake well.\n\nWhat does normality mean?\n\nNormality is a measure of concentration equal to the gram equivalent weight per litre of solution. Gram equivalent weight is the measure of the reactive capacity of a molecule. The solute’s role in the reaction determines the solution’s normality. Normality is also known as the equivalent concentration of a solution.\n\n## How do you prepare a solution for normality?\n\nNormal solutions are prepared by dissolving gram equivalent weight of solute making 1 litre of solution. It means, to prepare 1 liter solution, we have to dissolve the solute equal to the equivalent weight of the solute in grams.\n\n## How do you make a N 20 solution?\n\nProcedure\n\n1. Rinse and fill the burette with the given KMnO4 solution.\n2. Weigh exactly 1.58 g of oxalic acid crystals and dissolve in water to prepare 500 ml of.\n3. Add one test tube (~ 20 ml) full of dilute sulphuric acid (~ 4 N) to the solution in , titration flask.\n4. Note the initial reading of the burette.\n\nHow do you calculate normality?\n\nNormality Formula\n\n1. Normality = Number of gram equivalents × [volume of solution in litres]-1\n2. Number of gram equivalents = weight of solute × [Equivalent weight of solute]-1\n3. N = Weight of Solute (gram) × [Equivalent weight × Volume (L)]\n4. N = Molarity × Molar mass × [Equivalent mass]-1\n5. N = Molarity × Basicity = Molarity × Acidity.\n\n### What is equivalent weight of H2SO4?\n\nEquivalent weights may be calculated from molar masses if the chemistry of the substance is well known: sulfuric acid has a molar mass of 98.078(5) g mol−1, and supplies two moles of hydrogen ions per mole of sulfuric acid, so its equivalent weight is 98.078(5) g mol−1/2 eq mol−1 = 49.039(3) g eq−1.\n\n### What is the formula of normality in chemistry?\n\nHence, N = NumberofequivalentsVolumeinlitres = 2/1 = 2 Eq/lt. Question: What is the normality of 0.1381 M NaOH? Since the Equivalent Weight of NaOH is equal to Molar Mass hence the molarity is equal to Normality in this case.\n\nHow can we prepare 0.1 N HCL?\n\nCalculations: Stock bottle of 37% HCL. 37 ml of solute/100 ml of solution. Therefore add 8.3 ml of 37% HCL to 1 liter of D5W or NS to create a 0.1N HCL solution.\n\n7.9995\n\n## What is difference between normality and molarity?\n\nOne of the main differences between the normality and molarity of a solution is that normality describes the amount of gram equivalent of compound present in the solution while molarity describes the number of moles present in the solution.\n\nWhat is the molarity of 1N H2SO4?\n\n2M\n\n### How do you test for normality of H2SO4?\n\nIf you know the Molarity of an acid or base solution, you can easily convert it to Normality by multiplying Molarity by the number of hydrogen (or hydroxide) ions in the acid (or base). For example, a 2 M H2SO4 solution will have a Normality of 4N (2 M x 2 hydrogen ions).\n\n### What is 0.02 N H2SO4?\n\nSpecifications\n\nConcentration or Composition (by Analyte or Components) 0.02N (N/50)\nTraceability to NIST LOT 84L Potassium acid phthalate\nBoiling Point 100°C\nChemical Name or Material Sulfuric Acid Solution, 0.02N (N/50)\n\nWhat is health as normality?\n\nNormality as health may be defined on various levels: Biological (physical) normality: A whole of undisturbed functions. There are, however, non-reflected presumptions: it is not said what. is the aim of an organism. A “humanistic” definition must precede. Psychological normality: A well balanced result of an adequate.\n\n## What is normality of a solution?\n\nNormality (N) is defined as the number of mole equivalents per liter of solution:normality = number of mole equivalents/1 L of solution. Like molarity, normality relates the amount of solute to the total volume of solution; however, normality is specifically used for acids and bases.\n\n## What is 0.1 N NaOH?\n\nSo the equivalent weight of NaOH is 40. To make 1 N solution, dissolve 40.00 g of sodium hydroxide in water to make volume 1 liter. For a 0.1 N solution (used for wine analysis) 4.00 g of NaOH per liter is needed.\n\nHow do you make 0.5 N H2SO4?\n\nSulphuric Acid Solution Standardization Weigh accurately about 0.8 g of anhydrous Sodium Carbonate, previously heated at about 270°C for 1 hour. Dissolve it in 100 ml of water and add 0.1 ml of methyl red solution. Add the acid slowly from a burette, with constant stirring, until the solution becomes faintly pink.\n\n### What is the equivalent weight of na2co3?\n\nGive The General Formula To Represent An Alkane What Happens To The Kinetic Energy If The Speed Of An Object Doubles\n\n### Why Oxalic acid is primary standard?\n\nA primary standard is some substance such as oxalic acid which can be precisely weighed out in pure form, so that the number of moles present can be accurately determined from the measured weight and the known molar mass. The standard solutions used in an acid-base titration need not always be primary standards.\n\nWhat is mental normality?\n\nIn the broadest sense, clinical normality is the idea of uniformity of physical and psychological functioning across individuals. Psychiatric normality, in a broad sense, states that psychopathology are disorders that are deviations from normality. Normality, and abnormality, can be characterized statistically.\n\n## What is pH of 0.1 N HCl?\n\npH of common acids like sulfuric, acetic and more\n\nAcid Normality pH\nHydrochloric 0.1 N 1.1\nHydrochloric 0.01 N 2.0\nHydrocyanic 0.1 N 5.1\nHydrogen sulfide 0.1 N 4.1\n\n## How do you make 2 N HCl?\n\n2N HCl. Prepare 1 L of 2N HCl by mixing 834 ml of deionized water and 166 ml of concentrated 12N HCl. This solution is stable at room temperature. Caution: This solution should be prepared under a hood with the HCl slowly being added to the deionized water.\n\nWhy is equivalent weight used?\n\nThe idea of equivalent mass to compare chemically different elements! Atoms combine with each other to form chemical compounds, such that the elements are always present in definite proportions by mass and this property can be used to make chemically different molecules with different mass, equal.\n\n### What is normal and abnormal Behaviour?\n\n“Any behavior that pertains to accepted societal patterns is called normal behaviour whereas that is against social norms is called abnormal behaviour.”\n\n### How do you make 2 N H2SO4?\n\nSo 200 ml of concentrated HCl is diluted to 1000 ml with water to make 2N HCl. for 2N H2SO4 98 G of H2SO4 is required. So 100 ml of concentrated H2SO4 is diluted to 1000 ml with water to make 2N H2SO4.\n\nWhat is equivalent weight HCl?\n\n85.1g"
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.8938754,"math_prob":0.9762112,"size":7948,"snap":"2023-40-2023-50","text_gpt3_token_len":2158,"char_repetition_ratio":0.16553374,"word_repetition_ratio":0.019159911,"special_character_ratio":0.25440362,"punctuation_ratio":0.11974922,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9921135,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2023-12-01T16:50:14Z\",\"WARC-Record-ID\":\"<urn:uuid:89ab87fe-73e1-4326-9b11-2e6644235338>\",\"Content-Length\":\"113251\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:b2fc2b37-e9cb-4a88-b5bb-eebdad99dd0b>\",\"WARC-Concurrent-To\":\"<urn:uuid:316852a3-8297-4ba4-94ab-6ebd4cc04b74>\",\"WARC-IP-Address\":\"104.21.74.24\",\"WARC-Target-URI\":\"https://mysqlpreacher.com/how-do-you-make-1n-h2so4/\",\"WARC-Payload-Digest\":\"sha1:TK4PCB2VZZJF2DOAW37ME45BFQZSJ3XG\",\"WARC-Block-Digest\":\"sha1:ZWRDDZTNEBCXRKFUPEO3IN4LJDAVZI5S\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2023/CC-MAIN-2023-50/CC-MAIN-2023-50_segments_1700679100290.24_warc_CC-MAIN-20231201151933-20231201181933-00019.warc.gz\"}"} |
https://www.solidangl.es/2021/03/spr21-mat130-circles-and-ellipses.html | [
"$$\\definecolor{flatred}{RGB}{192, 57, 43} \\definecolor{flatblue}{RGB}{41, 128, 185} \\definecolor{flatgreen}{RGB}{39, 174, 96} \\definecolor{flatpurple}{RGB}{142, 68, 173} \\definecolor{flatlightblue}{RGB}{52, 152, 219} \\definecolor{flatlightred}{RGB}{231, 76, 60} \\definecolor{flatlightgreen}{RGB}{46, 204, 113} \\definecolor{flatteal}{RGB}{22, 160, 133} \\definecolor{flatpink}{RGB}{243, 104, 224}$$\n\n## March 27, 2021\n\n### Circles and Ellipses\n\nGo to Preview Activity\n\nTextbook Reference: Section 10.1 The Ellipse\n\nCongratulations! You've made it through the first half of the course. Pat yourself on the back for making it this far.\n\nAs of our last session, we're now done with our in-depth study of the circular functions. For the rest of the semester, we'll be jumping around between number of smaller but interconnected topics — conic sections, parametric equations, polar coordinates, vectors, and complex numbers.\n\nThat doesn't mean the circular functions are going away though.\n\nOn the contrary, we'll see them pop up every so often as just the right tool to get a better understanding of how the above topics work.\n\nBy the way, I'm trying something new with how to organize my lessons! To see the different parts, click the buttons to open each tab. When you finish reading one tab, move on to the next. Make sure to read all tabs so you're ready to do the Preview Activity.\n\n## Conic sections\n\nOur next topic is actually one of the most ancient objects of study in the history of geometry. When we take an infinite double cone as shown in the figure below and slice through it with a plane, the shape we get is called a conic section.\n\nDepending on the angle of the plane compared to the side of the cone, we can get a number of different curved shapes: a circle, an ellipse, a parabola, or a hyperbola.\n\nThese shapes have been studied intensely since ancient Greece (most notably by Apollonius of Perga), no doubt in part because of their wide variety of applications such as acoustic design, non-invasive surgery, and planetary motion. They also lend themselves well to the tools of analytic geometry, as they have relatively simple algebraic equations (needing nothing more complicated than quadratics!) so we can use algebra to investigate their properties.\n\nNext tab: Circles\n\nGo to top\n\n## Circles\n\nArguably the simplest type of conic section is a circle, which we get by slicing the cone at a perfectly horizontal angle.\n\nEven when studying a simple shape like a circle, though, there's always more interesting things we can find (as you've no doubt seen this semester).\n\nIn fact, have you ever actually tried to define a circle?\n\nIt's trickier than it sounds! You might start off with talking about it being round, but there are lots of round shapes. Or you might say it has the same width all the way around, but even this isn't enough to characterize a circle. After some thought, though, you might come up with a definition like this:\n\nA circle is a plane figure, consisting of all points that are some fixed distance (called the radius) from a given center point.\n\nThis is good so far, but we can do even better. Let's give names to some of these objects — we'll say that the radius is $$r$$, the center point is $$(h,k)$$, and that any arbitrary point on the circle will be $$(x,y)$$. (Notice that this means $$h$$, $$k$$, and $$r$$ stay the same for a given circle, while $$x$$ and $$y$$ can be used to describe any point on the circle.) Let's add this to our definition:\n\nA circle is a plane figure, consisting of all points $$(x,y)$$ that are some fixed distance $$r$$ (called the radius) from a given center point $$(h,k)$$.\n\nWhat's nice about this is that now we can also describe it algebraically! The defining property of a circle can be written using the distance formula as follows: $\\sqrt{(x-h)^2+(y-k)^2}=r$ To avoid using ugly square roots, we can then square both sides: $\\boxed{(x-h)^2+(y-k)^2=r^2}$ This is what we'll use from now on as the equation of a circle.\n\n### Example\n\nIf a circle has its center at $$(3,-2)$$ and a radius of $$5$$, its equation is: $(x-3)^2+(y+2)^2=25$ In fact, if you go type this into Desmos right now, this is exactly the graph you'll see.\n\nNext tab: Ellipses\n\nGo to top\n\n## Ellipses\n\nIf we cut our double cone at a slightly tilted angle, we'll end up with an oval shape called an ellipse.\n\nWe'll look at the algebraic equation for an ellipse in class; for now, we're just going to look at \"anatomy\" of an ellipse.\n\nUnlike on a circle, the points on an ellipse aren't always the same distance from the center. The largest distance across the ellipse (the \"big diameter\") is called the major axis, while the smallest distance across the ellipse (the \"small diameter\") is called the minor axis. The respective \"big radius\" and \"small radius\" are often called the semimajor axis and semiminor axis.\n\nIn addition, there are two special points inside an ellipse called the foci (marked below with X's).\n\nThe special property of the foci is that, given any point on the ellipse, the sum of the distances from that point to either focus always adds up to the same number, regardless of which point on the ellipse you choose.\n\nDrag the black point around the ellipse. Try a few different points and watch what happens when you add the two distances shown.\n\nOne interesting thing about the foci of an ellipse is that if you shoot a ray from one focus of an ellipse and reflect off the rim of the ellipse, it will always bounce back to the other focus. We'll see why this is useful in class.\n\nGo to top\n\n# Preview Activity 19\n\n...wait, 19? What happened to 17 and 18?\n\nWell, remember how I said that we wouldn't actually end up doing Preview Activities for the last two classes? I'm essentially going to \"give\" you two free Preview Activities, just to make sure things don't get confusing between keeping the lesson numbers matched up. 🙂\n\nAnswer these questions and submit your answers as a document on Moodle. (Please submit as .docx or .pdf if possible.)\n\n1. Suppose the equation of a circle is $$(x+1)^2+(y-2)^2=4$$. Find the center and radius of the circle by looking at the equation; then check your answer by putting it into Desmos. If your center and radius didn't match your graph, what mistake did you make?\n2. If you look at the graph of $$(x+1)^2+(y-2)^2=4$$, it appears to go through the point $$(0.4,3.4)$$, but it's difficult to be sure from the graph alone. Use the equation to determine whether or not the graph actually goes through this point.\n3. Using Desmos, graph the ellipse with the following equation: $\\dfrac{(x+1)^2}{9}+\\dfrac{(y-3)^2}{4}=1$ How do you think the numbers in this equation were obtained, based on the figure?\n4. Do you think an ellipse is a type of circle? Why or why not?\n5. Answer AT LEAST one of the following questions:\n1. What was something you found interesting about this activity?\n2. What was an \"a-ha\" moment you had while doing this activity?\n3. What was the muddiest point of this activity for you?\n4. What question(s) do you have about anything you've done?\n\nName\n\nEmail *\n\nMessage *"
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.94663465,"math_prob":0.98223937,"size":6534,"snap":"2021-21-2021-25","text_gpt3_token_len":1546,"char_repetition_ratio":0.11577336,"word_repetition_ratio":0.02110818,"special_character_ratio":0.24165902,"punctuation_ratio":0.108270675,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.99661314,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2021-06-20T00:20:54Z\",\"WARC-Record-ID\":\"<urn:uuid:253825c4-c109-432b-9b6a-59b077ce3e50>\",\"Content-Length\":\"53242\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:6c2fee04-c323-4196-a958-4d68b28df98f>\",\"WARC-Concurrent-To\":\"<urn:uuid:f23a894a-74b5-4597-b44d-1d3e8f1ecf61>\",\"WARC-IP-Address\":\"172.217.8.19\",\"WARC-Target-URI\":\"https://www.solidangl.es/2021/03/spr21-mat130-circles-and-ellipses.html\",\"WARC-Payload-Digest\":\"sha1:5ATD5TUZDJ2RIDBKPBR2UIXAGHSRO2WR\",\"WARC-Block-Digest\":\"sha1:46C76CJ4J3GMDQE53WWLUBJTGEZBIWEV\",\"WARC-Identified-Payload-Type\":\"application/xhtml+xml\",\"warc_filename\":\"/cc_download/warc_2021/CC-MAIN-2021-25/CC-MAIN-2021-25_segments_1623487653461.74_warc_CC-MAIN-20210619233720-20210620023720-00001.warc.gz\"}"} |
https://brokensandals.net/technical/programming-challenges/ | [
"brokensandals.net -> Programming challenges\n\nMy solutions, with detailed explanations, for various programming challenges.\n\n Euler 1 I compare five solutions to a simple problem: summing multiples of 3 and 5. Euler 2 I explore Fibonacci numbers a little bit by comparing seven solutions to a simple problem. Array Manipulation A deceptively simple-sounding problem: perform a series of updates to an array, and report the highest value in the array at the end. The trick is doing this quickly for a large array or large number of updates. I explain a couple efficient solutions. Count Triplets You're asked to count the how many triplets can be formed with indices of an array such that their values are in geometric progression. I explain O(N3) and O(N) solutions. Hints are available. Matrix Layer Rotation This problem asks you to find the outcome of \"rotating\" a matrix in a specific way a given number of times, without going through each iteration. I explain the solution and discuss program structure in detail. Maximum Subarray Sum A challenging problem: given an array, find the subarray whose sum modulo a given number is highest. I explain the solution with illustrations. Hints are available. Sock Merchant and Ransom Note Two beginner problems focused on hashtables. I compare and contrast functional and imperative approaches for each, and also discuss a tradeoff between time and space efficiency. Hints are available. Special String Again A string problem in which you must count the number of substrings meeting certain criteria. I explain O(N3), O(N2), and O(N) solutions. Hints are available."
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.8742435,"math_prob":0.90305305,"size":1580,"snap":"2023-40-2023-50","text_gpt3_token_len":348,"char_repetition_ratio":0.13007614,"word_repetition_ratio":0.016064256,"special_character_ratio":0.20253165,"punctuation_ratio":0.10689655,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.97485316,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2023-12-10T04:28:22Z\",\"WARC-Record-ID\":\"<urn:uuid:c1ec7605-26c8-402d-9bf0-5987b349236c>\",\"Content-Length\":\"4877\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:3d04a86f-1ee7-47a8-a733-f59cb951cd3a>\",\"WARC-Concurrent-To\":\"<urn:uuid:9c1ce63a-dbb5-4ed5-aed6-94613aed72c3>\",\"WARC-IP-Address\":\"104.198.14.52\",\"WARC-Target-URI\":\"https://brokensandals.net/technical/programming-challenges/\",\"WARC-Payload-Digest\":\"sha1:JKIWEH4G5P2LKTUCZ2B432C7A6HHXFCJ\",\"WARC-Block-Digest\":\"sha1:O4IAX2MMHKMXOEONLVPV5UT5VHXPIWEC\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2023/CC-MAIN-2023-50/CC-MAIN-2023-50_segments_1700679101195.85_warc_CC-MAIN-20231210025335-20231210055335-00192.warc.gz\"}"} |
https://www.asap-fasteners.com/manufacturers/amplifonix/ | [
"AS9120B, ISO 9001:2015, and FAA 0056B Accredited\nSend Instant RFQ\n\n# Amplifonix - Aviation Parts Catalog\n\n## Amplifonix - Aviation Fasteners, Bearings Parts\n\nAt ASAP Fasteners, owned and operated by ASAP Semiconductor, our goal is to make parts procurement for parts like BX6155, BX6176, BX6559, BX6572, BX6675 by Amplifonix as quick and efficient as possible.\n\nCustomers can browse for parts and components like Other Connectors with their NSN from top brands Amplifonix. To get started with one of the fastest and most competitive quotes on the market, simply fill out and submit an RFQ.\n\nShowing 1 of 21\n• Part No Part Type Description NSN QTY RFQ\nBX5119 other connectors frequency (mhz) = 5 - 500 gain (typ/min) (db) = 15.5 / 14 noise figure (typ/max) ( N/A Avl\nBX5131 other connectors frequency (mhz) = 5 - 1300 gain (typ/min) (db) = 18 / 17 noise figure (typ/max) (d N/A Avl\nBX5149 other connectors frequency (mhz) = 5 - 150 gain (typ/min) (db) = 23.5 / 22.5 noise figure (typ/max) N/A Avl\nBX5150 other connectors frequency (mhz) = 10 - 300 gain (typ/min) (db) = 20 / 19 noise figure (typ/max) (d N/A Avl\nBX5670 other connectors frequency (mhz) = 20 - 250 gain (typ/min) (db) = 8.2 / 7 noise figure (typ/max) (d N/A Avl\nBX6155 other connectors frequency (mhz) = 300 - 1000 gain (typ/min) (db) = 12.5 / 10.5 noise figure (typ/m N/A Avl\nBX6176 other connectors frequency (mhz) = 5 - 1000 gain (typ/min) (db) = 13.5 / 12 noise figure (typ/max) N/A Avl\nBX6559 other connectors frequency (mhz) = 5 - 500 gain (typ/min) (db) = 11.5 / 10 noise figure (typ/max) ( N/A Avl\nBX6572 other connectors frequency (mhz) = 5 - 500 gain (typ/min) (db) = 14.7 / 13.5 noise figure (typ/max) N/A Avl\nBX6675 other connectors frequency (mhz) = 5 - 500 gain (typ/min) (db) = 20.5 / 19 noise figure (typ/max) ( N/A Avl\nBX6721 other connectors frequency (mhz) = 5 - 500 gain (typ/min) (db) = 30 / 28 noise figure (typ/max) (db N/A Avl\nBX7270 other connectors frequency (mhz) = 10 - 250 gain (typ/min) (db) = 8.3 / 7 noise figure (typ/max) (d N/A Avl\nBX7271 other connectors frequency (mhz) = 5 - 250 gain (typ/min) (db) = 18 / 16 noise figure (typ/max) (db N/A Avl\nBX7272 other connectors frequency (mhz) = 10 - 200 gain (typ/min) (db) = 14.7 / 14 noise figure (typ/max) N/A Avl\nBX7382 other connectors frequency (mhz) = 20 - 250 gain (typ/min) (db) = 18 / 16 noise figure (typ/max) (d N/A Avl\nBX9111 other connectors frequency (mhz) = 5 - 1000 gain (typ/min) (db) = 15 / 14 noise figure (typ/max) (d N/A Avl\nBX9125 other connectors frequency (mhz) = 10 - 1500 gain (typ/min) (db) = 10.5 / 9 noise figure (typ/max) N/A Avl\nBX9139 other connectors frequency (mhz) = 10 - 2000 gain (typ/min) (db) = 8 / 6 noise figure (typ/max) (db N/A Avl\nBX9331 other connectors frequency (mhz) = 10 - 2000 gain (typ/min) (db) = 11.5 / 10.5 noise figure (typ/ma N/A Avl\nBX9333 other connectors frequency (mhz) = 5 - 1000 gain (typ/min) (db) = 11.5 / 10 noise figure (typ/max) N/A Avl\nBX9700 other connectors frequency (mhz) = 200 - 2000 gain (typ/min) (db) = 12 / 9.5 noise figure (typ/max) N/A Avl\nBX9712 other connectors frequency (mhz) = 500 - 2000 gain (typ/min) (db) = 11.5 / 10 noise figure (typ/max N/A Avl\nBX9713 other connectors frequency (mhz) = 500 - 2000 gain (typ/min) (db) = 11 / 8.5 noise figure (typ/max) N/A Avl\nBXO9316 other connectors frequency range (mhz) = 2500 - 4000 p1db comp point (typ/min) (dbm) = 9 / 7 tuning N/A Avl\nBXO9334 other connectors frequency range (mhz) = 1000 - 1600 p1db comp point (typ/min) (dbm) = 12.5 / 10 tu N/A Avl\nFP5103 other connectors frequency (mhz) = 5 - 300 gain (typ/min) (db) = 11.5 / 10 noise figure (typ/max) ( N/A Avl\nFP5104 other connectors frequency (mhz) = 10 - 500 gain (typ/min) (db) = 12 / 10.5 noise figure (typ/max) N/A Avl\nFP5834 other connectors frequency (mhz) = 10 - 100 gain (typ/min) (db) = 19.7 / 18.7 noise figure (typ/max N/A Avl\nFP6157 other connectors frequency (mhz) = 20 - 500 gain (typ/min) (db) = 13 / 10.5 noise figure (typ/max) N/A Avl\nFP6191 other connectors frequency (mhz) = 100 - 600 gain (typ/min) (db) = 23.5 / 22 noise figure (typ/max) N/A Avl\nFP6198 other connectors frequency (mhz) = 10 - 500 gain (typ/min) (db) = 15 / 13.5 noise figure (typ/max) N/A Avl\nFP6444 other connectors frequency (mhz) = 10 - 400 gain (typ/min) (db) = 13 / 12 noise figure (typ/max) (d N/A Avl\nFP6487 other connectors frequency (mhz) = 10 - 400 gain (typ/min) (db) = 15.5 / 14 noise figure (typ/max) N/A Avl\nFP6521 other connectors frequency (mhz) = 5 - 500 gain (typ/min) (db) = 30 / 28 noise figure (typ/max) (db N/A Avl\nFP6554 other connectors frequency (mhz) = 5 - 400 gain (typ/min) (db) = 27.5 / 25 noise figure (typ/max) ( N/A Avl\nFP6607 other connectors frequency (mhz) = 5 - 500 gain (typ/min) (db) = 15 / 14 noise figure (typ/max) (db N/A Avl\nPN6117 other connectors frequency (mhz) = 5 - 250 gain (typ/min) (db) = 8.2 / 7 noise figure (typ/max) (db N/A Avl\nPN7207 other connectors frequency (mhz) = 10 - 300 gain (typ/min) (db) = 18 / 17 noise figure (typ/max) (d N/A Avl\nTN6557 other connectors frequency (mhz) = 10 - 500 gain (typ/min) (db) = 15 / 13.5 noise figure (typ/max) N/A Avl\nTN6721 other connectors frequency (mhz) = 5 - 500 gain (typ/min) (db) = 30 / 28 noise figure (typ/max) (db N/A Avl\nTN7207 other connectors frequency (mhz) = 10 - 300 gain (typ/min) (db) = 18 / 17 noise figure (typ/max) (d N/A Avl\nTN7208 other connectors frequency (mhz) = 5 - 250 gain (typ/min) (db) = 22.5 / 21 noise figure (typ/max) ( N/A Avl\nTN7211 other connectors frequency (mhz) = 30 - 200 gain (typ/min) (db) = 8.5 / 7.5 noise figure (typ/max) N/A Avl\nTN7270 other connectors frequency (mhz) = 10 - 250 gain (typ/min) (db) = 8.3 / 7 noise figure (typ/max) (d N/A Avl\nTN9269 other connectors frequency (mhz) = 10 - 1200 gain (typ/min) (db) = 22 / 20 noise figure (typ/max) ( N/A Avl\nTN9318 other connectors frequency (mhz) = 10 - 1000 gain (typ/min) (db) = 14.7 / 13.5 noise figure (typ/ma N/A Avl\nTON9052 other connectors frequency range (mhz) = 600 - 900 p1db comp point (typ/min) (dbm) = 15 / 13 tuning N/A Avl\nTON9250 other connectors frequency range (mhz) = 2000 - 2500 p1db comp point (typ/min) (dbm) = 11.5 / 9 tun N/A Avl\nTON9308 other connectors frequency range (mhz) = 350 - 400 p1db comp point (typ/min) (dbm) = 6 / 4 tuning v N/A Avl\nTON9329 other connectors frequency range (mhz) = 1875 - 1975 p1db comp point (typ/min) (dbm) = 7 / 5 tuning N/A Avl"
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.62788033,"math_prob":0.9895007,"size":6593,"snap":"2022-27-2022-33","text_gpt3_token_len":2845,"char_repetition_ratio":0.24131128,"word_repetition_ratio":0.62857145,"special_character_ratio":0.48854846,"punctuation_ratio":0.033795495,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.98875237,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2022-08-19T10:49:28Z\",\"WARC-Record-ID\":\"<urn:uuid:e38804b9-0d1d-494e-b7a4-661458649487>\",\"Content-Length\":\"69147\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:0b023f5b-3a1b-4d03-8dd4-d7daeb1611d3>\",\"WARC-Concurrent-To\":\"<urn:uuid:60aeb78e-c638-4a96-8286-bdc5287d28fc>\",\"WARC-IP-Address\":\"169.60.158.218\",\"WARC-Target-URI\":\"https://www.asap-fasteners.com/manufacturers/amplifonix/\",\"WARC-Payload-Digest\":\"sha1:K4QM6C7BVCVBSQB5VWSOXKSTTUY3YQTE\",\"WARC-Block-Digest\":\"sha1:JXP5IY4CP4KN4QV7I5YQCBJXCAVKYA7H\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2022/CC-MAIN-2022-33/CC-MAIN-2022-33_segments_1659882573667.83_warc_CC-MAIN-20220819100644-20220819130644-00559.warc.gz\"}"} |
http://www.java2s.com/example/csharp-book/longcount.html | [
"# CSharp - LINQ LongCount\n\n## Introduction\n\nThe LongCount operator returns the number of elements in the input sequence as a long.\n\n## Prototypes\n\nThere are two prototypes we cover. The First LongCount Prototype\n\n```public static long LongCount<T>(\nthis IEnumerable<T> source);\n```\n\nThe first prototype of the LongCount operator returns the total number of elements in the source input sequence by enumerating the entire input sequence and counting the number of elements.\n\nThe second prototype of the LongCount operator enumerates the source input sequence and counts every element by the predicate method.\n\n```public static long LongCount<T>(\nthis IEnumerable<T> source,\nFunc<T, bool> predicate);\n```\n\n## Exceptions\n\nArgumentNullException is thrown if any argument is null.\n\nThe following code generated two sequences using the Range operator and concatenated them together using the Concat operator.\n\n## Demo\n\n```using System;\nusing System.Linq;\nusing System.Collections;\nusing System.Collections.Generic;\nclass Program//from w ww. jav a 2s. co m\n{\nstatic void Main(string[] args)\n{\nlong count = Enumerable.Range(0, int.MaxValue).\nConcat(Enumerable.Range(0, int.MaxValue)).LongCount();\n\nConsole.WriteLine(count);\n}\n}\n```\n\n## Result",
null,
""
] | [
null,
"http://www.java2s.com/example/csharp-book/longcount-5c6d3.png",
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.55874044,"math_prob":0.83718514,"size":1110,"snap":"2019-13-2019-22","text_gpt3_token_len":217,"char_repetition_ratio":0.13471971,"word_repetition_ratio":0.054421768,"special_character_ratio":0.19729729,"punctuation_ratio":0.15656565,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.95416856,"pos_list":[0,1,2],"im_url_duplicate_count":[null,1,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2019-05-20T04:44:09Z\",\"WARC-Record-ID\":\"<urn:uuid:c740e9a1-de6e-4205-9dbd-6b499b18fee0>\",\"Content-Length\":\"6776\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:3f7f4cf1-58c5-4718-8cbb-f14e50bf4626>\",\"WARC-Concurrent-To\":\"<urn:uuid:caa45269-9566-4d96-83a7-8a35939036ae>\",\"WARC-IP-Address\":\"45.40.136.91\",\"WARC-Target-URI\":\"http://www.java2s.com/example/csharp-book/longcount.html\",\"WARC-Payload-Digest\":\"sha1:IKYVLIQLOMAT4FFMTQDWTJAARARCHGSH\",\"WARC-Block-Digest\":\"sha1:2Q5CVLXDL5GXSE2KSBFEIO7T4A6LPMFA\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2019/CC-MAIN-2019-22/CC-MAIN-2019-22_segments_1558232255562.23_warc_CC-MAIN-20190520041753-20190520063753-00252.warc.gz\"}"} |
http://derminelift.info/blank-addition-worksheets/fraction-addition-worksheet-color-the-fractions-blank-worksheets-and-blank-double-digit-addition-worksheets/ | [
"# Fraction Addition Worksheet Color The Fractions Blank Worksheets And Blank Double Digit Addition Worksheets",
null,
"fraction addition worksheet color the fractions blank worksheets and blank double digit addition worksheets.\n\nblank math addition worksheets printable hundreds chart rounding grid free,printable blank addition worksheets 3 digit fill in the and subtraction activities dice worksheet,fill in the blank addition and subtraction worksheets printable best image collection number line 3 digit,kindergarten blank addition worksheets fraction test worksheet free math and subtraction,blank addition and subtraction worksheets 3 digit domino decimals mixed operations,blank addition and subtraction worksheets 3 digit kindergarten grid printable math tables worksheet chart patterns,blank number line addition worksheets kids ten frame kindergarten by double digit and subtraction,blank domino addition worksheets and subtraction sentence 3 digit,blank 3 digit addition worksheets kids adding with zero fill in the and subtraction number line,place value worksheets grade yahoo search results image and chart printable blank addition double digit subtraction."
] | [
null,
"http://derminelift.info/wp-content/uploads/2018/03/fraction-addition-worksheet-color-the-fractions-blank-worksheets-and-blank-double-digit-addition-worksheets.jpg",
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.6785563,"math_prob":0.612223,"size":1051,"snap":"2019-13-2019-22","text_gpt3_token_len":167,"char_repetition_ratio":0.2712512,"word_repetition_ratio":0.04511278,"special_character_ratio":0.14557564,"punctuation_ratio":0.070063695,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.99397403,"pos_list":[0,1,2],"im_url_duplicate_count":[null,1,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2019-05-23T18:05:50Z\",\"WARC-Record-ID\":\"<urn:uuid:e29c8678-1c70-4d52-90b1-0a6be15f0f64>\",\"Content-Length\":\"37475\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:11c9a627-228c-4982-9911-23e5a0d084b1>\",\"WARC-Concurrent-To\":\"<urn:uuid:5a7cf69b-429d-4edb-9f5b-8db45033e7e8>\",\"WARC-IP-Address\":\"104.27.180.203\",\"WARC-Target-URI\":\"http://derminelift.info/blank-addition-worksheets/fraction-addition-worksheet-color-the-fractions-blank-worksheets-and-blank-double-digit-addition-worksheets/\",\"WARC-Payload-Digest\":\"sha1:P7FFIB6GABWQZ7MSNL7F2JDMFPJQP2BA\",\"WARC-Block-Digest\":\"sha1:QJNXC2TJOHBPK5R4FILWV5AJDED6OUC5\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2019/CC-MAIN-2019-22/CC-MAIN-2019-22_segments_1558232257316.10_warc_CC-MAIN-20190523164007-20190523190007-00081.warc.gz\"}"} |
https://hirecalculusexam.com/iwrite-math-pre-calculus-12/ | [
"# Iwrite Math Pre Calculus 12\n\nIwrite Math Pre Calculus 12th Edition: Lecture Notes in Mathematics 457, Springer 11.12.2014 Abstract Math precalculus is the famous classical calculus problem, also known simply as fuzzy or fuzzy-precalculus. It is particularly emphasized in Cauchy reduction calculus of fuzzy} 1. Introduction Fuzzy precalculus refers to fuzzy calculus with a reference to a set of functions. For example, fuzzy fuzzy-precalculus convexity (FUBF Pre Calculus) and fuzzy fuzzy regularity (FUBF Regularity) are common topics in Cauchy reduction calculus. Fuzzy fuzzy-precalculus is the her response popular topic in computational fuzzy analysis from its foundation. In this paper, the mathematical problem of fuzzy fuzzy-precalculus is compared to fuzzy fuzzy-regularity, a classic fuzzy approach, and the feasibility of its computational efficiency is presented. Precedence In FUBF Pre Calculus, fuzzy precalculus is presented as Deremin.} Fuzzy precalculus derives from fuzzy fuzzy-regularity in [X]→\\mathbb{R} where $\\mathbb{R}$ be a two-dimensional space such that $\\{x_0,\\ldots,x_{m} \\}$,$\\{y_0,\\ldots,y_{m-1} \\}$,$\\{y_{m-1} \\}$,$\\{y_{m},\\ldots,y_{m-r} \\}$ stands for some fuzzy sets or sets. A vector $\\vb \\in \\mathbb{R}^n$, denoting the fuzzy-value, is defined as $\\vb = x_0 + \\ldots + x_{n-m}$, and $K$ is the fuzzy kernel. Our framework allows for many different types of fuzzy systems. According to [X]→\\mathbb{R}, the fuzzy system: $\\mathcal{F} = \\mathcal{X}^{\\mathbb{R}}$ is a fuzzy system on $\\mathbb{R}^n$ with domain important link denoting the solution space of fuzzy-fuzzy system which is defined as follows: $$\\begin{array}{rl} \\mathcal{F} : \\quad & & \\mathcal{X}^{\\mathbb{R}}\\ne0\\\\ \\vb : & & \\mathcal{F} \\ne\\emptyset \\end{array}$$ There is no restriction for a system on the reference domain of fuzzy systems in this paper. However the fuzzy systems: $\\mathbb{R}^n \\rightarrow \\mathcal{F}$ on $\\mathbb{R}^n$ have the potential for system to be further partitioned as: They are partitioned into a large enough set $\\mathcal{V}= \\{v_0,\\ldots,v_{\\min} \\}$, where $v_i$ is the source of the fuzzy fuzzy-fuzzy system assigned by see post fuzzy fuzzy system $\\mathcal{F}$ on $\\mathbb{R}^n$. Fuzzy fuzzy-precalculus concepts ================================ The main definition of fuzzy precalculus in following two sections is given below. Let $x \\in \\left\\{0,1\\right\\}$. A fuzzy processor is a function $f : \\mathbb{Z} \\times \\mathbb{R}^{2} \\rightarrow \\left\\{0,1\\right\\}$ such that $f(0)=0$ and $f(1)=1$, $f(2)=0$, $f(3)=1$, $f(4)=0$, $f(5)=1$, $f(6)=1$, $f(7)=1$, $f(8)=0$, $f(9) = 2$, $f(10) = 0$, $f(11)=1$. For a fuzzy number $x$ with respect to $\\mathbb{R}$, $x(x)$ denotes the fuzzyIwrite Math Pre Calculus 12.1 $x$ and $y$ are defined with $x^2 – 2\\epsilon$ and, using Weierstrass Equation that all roots are distinct. $x$ and $y$ are in the lower (upper) part of $[x,y]^2$.\n\n## Need Someone To Do My Statistics Homework\n\nAssuming $B=\\{u: u^2+(y^2-u^2) x \\}$, $B^2=\\{1,\\dfrac{u^2x^2}{x^2-x}\\}=\\{a,\\dfrac{(u^2+a)x-(1+a)u}{x-x^2}\\}$, we have $x=u$, let $q(x)=bx^2+cxu^2=\\dfrac{u^2+(a-c)u}{a-c}$, and $y=\\dfrac{u^2x}{-u}$. It follows that $x\\equiv 1$, $y\\equiv 1$. This reduces to the proposition whose proof begins by noting that $B^2$ is a submanifold of $B$ (and not a ball), but by dropping $B$ we can prove that $B^2\\ni (x,y)\\mapsto (x^2,y^2, \\frac{y^2}{(y^2-x^2)^2},p)$. Given $A\\subset G$, $\\frac{(A\\cap G)^2}{J(G)}\\sim B^2$. To solve $p=x^2/x-y^2/y-a$, notice that $g(A’)\\sim g(B’)$, so $p=xf=xf^2=xf^2g=xf^2(x/x-y)=f(x/x-y)$, which implies $x^2<0$. Thus, since we have given sufficient conditions to have $x^2=p$, they must be satisfied. Note that $x>0$, $y>q$, and $y\\leq q$ and follow from the inequalities. Thus, we get for $A\\subset B^2$, $y\\leq q$, that the desired $A$, for $x \\in A$, must lie in $$\\bigcup_{a\\in A^{-1}}B^2 a^{-1}\\{y^2/y\\}\\in B_q(B^2)^{\\www}(M,\\{x,y,g=\\limits{g\\,|\\,Z\\}});$$ in other words, $B^2\\sim B$. Next, we will give a new proof of Equation in Lemma $lemma:eql$ using $I$ operations on the dual power algebra. Given $I\\subset G$, $I$ is given an induction on $o = (A_o,\\leq B_o)$, where $$A_o=\\bigwedge\\limits_a\\mathcal{A}\\Bigl(I_o\\times(dB_o-I)\\Bigr)$$ are the power blocks. A nonempty intersection contains all the corresponding powers of the normals $I$. (The superscript $(n)}$ becomes $g^{\\gtrless (n)}$, which is positive.) Observe that by Equation, the set of nonzero simple roots consists of all ones greater than $\\frac{1}{y}{x!} + \\frac{1}{z}{x!} + \\frac{1}{x}{u!}$, where $x,u$ are two arbitrary real numbers and $Z=|\\{a\\,:\\, (x,a)|=1\\}|$. For $I$ nonempty, assume that $I$ is nonzero. Then $y\\leq c_0(A_1,\\leq\\lambda)$, where the constant $\\lambda$ is unique up to addition. Following the notation by @Mikulin77 [section 5] toIwrite Math Pre Calculus 12 12: A Computer Assignment by Alvaro Arzner and Carin Fernandez – Computational algebra and programming analysis – from its history to the present day – and with its associated contributions. John Doolittle was born in Brooklyn, NY. He studied computer science at the University of Leipsic. He went onto work for the University of Amsterdam, where he completed the Masters of Engineering degree in 1971 in the mathematics department of the Rensselaer Polytechnic Institute, in Haifa, Israel. In 1974 he completed his PhD at the Hebrew University of Jerusalem.\n\n## City Colleges Of Chicago Online Classes",
null,
""
] | [
null,
"https://hirecalculusexam.com/wp-content/uploads/2022/11/New-POPUP-1024x576.png",
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.90851855,"math_prob":0.9999714,"size":9156,"snap":"2023-40-2023-50","text_gpt3_token_len":2565,"char_repetition_ratio":0.11767919,"word_repetition_ratio":0.004421518,"special_character_ratio":0.27599388,"punctuation_ratio":0.11117288,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":1.0000091,"pos_list":[0,1,2],"im_url_duplicate_count":[null,null,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2023-09-30T04:01:18Z\",\"WARC-Record-ID\":\"<urn:uuid:41d70867-9e9b-42c6-a5f4-3c1b0f4aaa44>\",\"Content-Length\":\"78937\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:3a8346b7-a915-4e67-9676-5f6adb1f1337>\",\"WARC-Concurrent-To\":\"<urn:uuid:90fcb077-b5d5-42f7-9c06-2ec150534a95>\",\"WARC-IP-Address\":\"104.21.85.143\",\"WARC-Target-URI\":\"https://hirecalculusexam.com/iwrite-math-pre-calculus-12/\",\"WARC-Payload-Digest\":\"sha1:2VMMGR7EHTIBHDVH6I2HB5M7SNHSRVLP\",\"WARC-Block-Digest\":\"sha1:IZ7XJJUR4E2VCHYBUM7P24GN42YWV7T2\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2023/CC-MAIN-2023-40/CC-MAIN-2023-40_segments_1695233510575.93_warc_CC-MAIN-20230930014147-20230930044147-00834.warc.gz\"}"} |
http://umj.imath.kiev.ua/index.php/umj/article/view/1801 | [
"# Common fixed-point theorems for hybrid generalized $(F, ϕ)$ -contractions under the common limit range property with applications ......................\n\nWe consider a relatively new hybrid generalized $F$ -contraction involving a pair of mappings and use this contraction to prove a common fixed-point theorem for a hybrid pair of occasionally coincidentally idempotent mappings satisfying generalized $(F, \\varphi)$-contraction condition with the common limit range property in complete metric spaces. A similar result involving a hybrid pair of mappings satisfying the rational-type Hardy – Rogers $(F, \\varphi)$-contractive condition is also proved. We generalize and improve several results available from the existing literature. As applications of our results, we prove two theorems for the existence of solutions of certain system of functional equations encountered in dynamic programming and the Volterra integral inclusion. Moreover, we provide an illustrative example.\nAhmadullahM., ImdadM., and NashineH. K. “Common Fixed-Point Theorems for Hybrid generalized $(F, ϕ)$ -Contractions under the Common Limit Range Property With Applications ......................”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 69, no. 11, Nov. 2017, pp. 1534-50, http://umj.imath.kiev.ua/index.php/umj/article/view/1801."
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.7952531,"math_prob":0.9406187,"size":1383,"snap":"2020-45-2020-50","text_gpt3_token_len":308,"char_repetition_ratio":0.14068165,"word_repetition_ratio":0.011494253,"special_character_ratio":0.23355025,"punctuation_ratio":0.28832117,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9531542,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2020-12-02T22:21:28Z\",\"WARC-Record-ID\":\"<urn:uuid:e2bb8147-8f49-4d8b-974b-bf1c9ef3a5c5>\",\"Content-Length\":\"23645\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:c3418752-8ef7-413b-999d-aa67bde76da7>\",\"WARC-Concurrent-To\":\"<urn:uuid:beb0707d-8728-4a3f-9e52-9d14e80a9a0b>\",\"WARC-IP-Address\":\"194.44.31.54\",\"WARC-Target-URI\":\"http://umj.imath.kiev.ua/index.php/umj/article/view/1801\",\"WARC-Payload-Digest\":\"sha1:3QZDR4OPQHWN5ZZSRJT2SCJLSHFI5U5Z\",\"WARC-Block-Digest\":\"sha1:ZOIPZGTNSZBZ4NO6ROZARX4OJTVGEDAF\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2020/CC-MAIN-2020-50/CC-MAIN-2020-50_segments_1606141716970.77_warc_CC-MAIN-20201202205758-20201202235758-00507.warc.gz\"}"} |
https://www.colorhexa.com/abb540 | [
"# #abb540 Color Information\n\nIn a RGB color space, hex #abb540 is composed of 67.1% red, 71% green and 25.1% blue. Whereas in a CMYK color space, it is composed of 5.5% cyan, 0% magenta, 64.6% yellow and 29% black. It has a hue angle of 65.1 degrees, a saturation of 47.8% and a lightness of 48%. #abb540 color hex could be obtained by blending #ffff80 with #576b00. Closest websafe color is: #99cc33.\n\n• R 67\n• G 71\n• B 25\nRGB color chart\n• C 6\n• M 0\n• Y 65\n• K 29\nCMYK color chart\n\n#abb540 color description : Moderate yellow.\n\n# #abb540 Color Conversion\n\nThe hexadecimal color #abb540 has RGB values of R:171, G:181, B:64 and CMYK values of C:0.06, M:0, Y:0.65, K:0.29. Its decimal value is 11253056.\n\nHex triplet RGB Decimal abb540 `#abb540` 171, 181, 64 `rgb(171,181,64)` 67.1, 71, 25.1 `rgb(67.1%,71%,25.1%)` 6, 0, 65, 29 65.1°, 47.8, 48 `hsl(65.1,47.8%,48%)` 65.1°, 64.6, 71 99cc33 `#99cc33`\nCIE-LAB 70.923, -18.888, 56.248 34.244, 42.076, 11.168 0.391, 0.481, 42.076 70.923, 59.335, 108.561 70.923, -1.706, 67.769 64.866, -19.283, 35.198 10101011, 10110101, 01000000\n\n# Color Schemes with #abb540\n\n• #abb540\n``#abb540` `rgb(171,181,64)``\n• #4a40b5\n``#4a40b5` `rgb(74,64,181)``\nComplementary Color\n• #b58540\n``#b58540` `rgb(181,133,64)``\n• #abb540\n``#abb540` `rgb(171,181,64)``\n• #71b540\n``#71b540` `rgb(113,181,64)``\nAnalogous Color\n• #8540b5\n``#8540b5` `rgb(133,64,181)``\n• #abb540\n``#abb540` `rgb(171,181,64)``\n• #4071b5\n``#4071b5` `rgb(64,113,181)``\nSplit Complementary Color\n• #b540ab\n``#b540ab` `rgb(181,64,171)``\n• #abb540\n``#abb540` `rgb(171,181,64)``\n• #40abb5\n``#40abb5` `rgb(64,171,181)``\n• #b54a40\n``#b54a40` `rgb(181,74,64)``\n• #abb540\n``#abb540` `rgb(171,181,64)``\n• #40abb5\n``#40abb5` `rgb(64,171,181)``\n• #4a40b5\n``#4a40b5` `rgb(74,64,181)``\n• #767c2c\n``#767c2c` `rgb(118,124,44)``\n• #878f33\n``#878f33` `rgb(135,143,51)``\n• #99a239\n``#99a239` `rgb(153,162,57)``\n• #abb540\n``#abb540` `rgb(171,181,64)``\n• #b7c04e\n``#b7c04e` `rgb(183,192,78)``\n• #bec761\n``#bec761` `rgb(190,199,97)``\n• #c6ce74\n``#c6ce74` `rgb(198,206,116)``\nMonochromatic Color\n\n# Alternatives to #abb540\n\nBelow, you can see some colors close to #abb540. Having a set of related colors can be useful if you need an inspirational alternative to your original color choice.\n\n• #b5a240\n``#b5a240` `rgb(181,162,64)``\n• #b5ac40\n``#b5ac40` `rgb(181,172,64)``\n• #b5b540\n``#b5b540` `rgb(181,181,64)``\n• #abb540\n``#abb540` `rgb(171,181,64)``\n• #a1b540\n``#a1b540` `rgb(161,181,64)``\n• #98b540\n``#98b540` `rgb(152,181,64)``\n• #8eb540\n``#8eb540` `rgb(142,181,64)``\nSimilar Colors\n\n# #abb540 Preview\n\nThis text has a font color of #abb540.\n\n``<span style=\"color:#abb540;\">Text here</span>``\n#abb540 background color\n\nThis paragraph has a background color of #abb540.\n\n``<p style=\"background-color:#abb540;\">Content here</p>``\n#abb540 border color\n\nThis element has a border color of #abb540.\n\n``<div style=\"border:1px solid #abb540;\">Content here</div>``\nCSS codes\n``.text {color:#abb540;}``\n``.background {background-color:#abb540;}``\n``.border {border:1px solid #abb540;}``\n\n# Shades and Tints of #abb540\n\nA shade is achieved by adding black to any pure hue, while a tint is created by mixing white to any pure color. In this example, #070703 is the darkest color, while #fcfcf8 is the lightest one.\n\n• #070703\n``#070703` `rgb(7,7,3)``\n• #141608\n``#141608` `rgb(20,22,8)``\n• #22240d\n``#22240d` `rgb(34,36,13)``\n• #303312\n``#303312` `rgb(48,51,18)``\n• #3d4117\n``#3d4117` `rgb(61,65,23)``\n• #4b501c\n``#4b501c` `rgb(75,80,28)``\n• #595e21\n``#595e21` `rgb(89,94,33)``\n• #676d26\n``#676d26` `rgb(103,109,38)``\n• #747b2c\n``#747b2c` `rgb(116,123,44)``\n• #828a31\n``#828a31` `rgb(130,138,49)``\n• #909836\n``#909836` `rgb(144,152,54)``\n• #9da73b\n``#9da73b` `rgb(157,167,59)``\n• #abb540\n``#abb540` `rgb(171,181,64)``\n• #b5bf4a\n``#b5bf4a` `rgb(181,191,74)``\n• #bbc458\n``#bbc458` `rgb(187,196,88)``\n• #c1c967\n``#c1c967` `rgb(193,201,103)``\n• #c7ce75\n``#c7ce75` `rgb(199,206,117)``\n• #cdd384\n``#cdd384` `rgb(205,211,132)``\n• #d3d992\n``#d3d992` `rgb(211,217,146)``\n• #d8dea1\n``#d8dea1` `rgb(216,222,161)``\n• #dee3af\n``#dee3af` `rgb(222,227,175)``\n• #e4e8be\n``#e4e8be` `rgb(228,232,190)``\n• #eaedcc\n``#eaedcc` `rgb(234,237,204)``\n• #f0f2db\n``#f0f2db` `rgb(240,242,219)``\n• #f6f7e9\n``#f6f7e9` `rgb(246,247,233)``\n• #fcfcf8\n``#fcfcf8` `rgb(252,252,248)``\nTint Color Variation\n\n# Tones of #abb540\n\nA tone is produced by adding gray to any pure hue. In this case, #7c7c79 is the less saturated color, while #daee07 is the most saturated one.\n\n• #7c7c79\n``#7c7c79` `rgb(124,124,121)``\n• #84866f\n``#84866f` `rgb(132,134,111)``\n• #8c8f66\n``#8c8f66` `rgb(140,143,102)``\n• #94995c\n``#94995c` `rgb(148,153,92)``\n• #9ba253\n``#9ba253` `rgb(155,162,83)``\n• #a3ac49\n``#a3ac49` `rgb(163,172,73)``\n• #abb540\n``#abb540` `rgb(171,181,64)``\n• #b3be37\n``#b3be37` `rgb(179,190,55)``\n• #bbc82d\n``#bbc82d` `rgb(187,200,45)``\n• #c2d124\n``#c2d124` `rgb(194,209,36)``\n``#cadb1a` `rgb(202,219,26)``\n• #d2e411\n``#d2e411` `rgb(210,228,17)``\n• #daee07\n``#daee07` `rgb(218,238,7)``\nTone Color Variation\n\n# Color Blindness Simulator\n\nBelow, you can see how #abb540 is perceived by people affected by a color vision deficiency. This can be useful if you need to ensure your color combinations are accessible to color-blind users.\n\nMonochromacy\n• Achromatopsia 0.005% of the population\n• Atypical Achromatopsia 0.001% of the population\nDichromacy\n• Protanopia 1% of men\n• Deuteranopia 1% of men\n• Tritanopia 0.001% of the population\nTrichromacy\n• Protanomaly 1% of men, 0.01% of women\n• Deuteranomaly 6% of men, 0.4% of women\n• Tritanomaly 0.01% of the population"
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.5117086,"math_prob":0.64972866,"size":3699,"snap":"2019-51-2020-05","text_gpt3_token_len":1587,"char_repetition_ratio":0.124492556,"word_repetition_ratio":0.011111111,"special_character_ratio":0.54257905,"punctuation_ratio":0.23337092,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9792934,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2020-01-25T15:12:13Z\",\"WARC-Record-ID\":\"<urn:uuid:f6abe60d-93f9-48c6-8c6f-8fcc9456b9ae>\",\"Content-Length\":\"36302\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:965a3c6f-64da-433f-8369-b69186189248>\",\"WARC-Concurrent-To\":\"<urn:uuid:6de22b71-1390-41ab-aa9d-9ba5555ec3a2>\",\"WARC-IP-Address\":\"178.32.117.56\",\"WARC-Target-URI\":\"https://www.colorhexa.com/abb540\",\"WARC-Payload-Digest\":\"sha1:G4ZJZ4APX5KSE2ALEEQQPNUZVXLQEGMA\",\"WARC-Block-Digest\":\"sha1:HHB6AKPHMNAPGHSFGKHKPNUTJLTFNBGY\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2020/CC-MAIN-2020-05/CC-MAIN-2020-05_segments_1579251672537.90_warc_CC-MAIN-20200125131641-20200125160641-00250.warc.gz\"}"} |
https://da.khanacademy.org/math/precalculus/x9e81a4f98389efdf:vectors/x9e81a4f98389efdf:vectors-intro/v/example-finding-components-of-a-vector | [
"Hovedindhold\n\n# Komposanter af vektorer\n\n## Video udskrift\n\n- [Voiceover] Find the components of vector AB. So when they're talking about the components, at least in this context, they're just talking about breaking it down into if we start at point A and we're finishing at point B, how much do we have to move in the X direction? So this is going to be essentially our change in X. And then how much do we have to move in the Y direction to go from point A to point B? So this one over here is going to be our change in X. I just wrote the Greek letter Delta for change in X. And then, the second component is going to be our change in Y. And to think about that, let's just think about what our starting and final points are, our initial and our terminal point are. So, this point right over here, point A, its coordinates are (4,4). And then point B, its coordinates are, let's see its X coordinate is (-7,-8). So let's first think about what our change in X is, and like always, I encourage you to pause the video and try to work through it on your own. Well let's see, if we're starting at four and then we are going from X equals four. That's where we're starting, to X equals negative seven. So that right over there is our change in X. And there's a couple of ways you could compute that. You could say, \"Look, we finished at negative seven. \"We started at negative four.\" You take your final point or where you end up, so that's negative seven, and you subtract your initial point, minus four, which is going to be equal to negative 11. The negative tells us that we decreased in X by 11. And you could see that. If you could just visually count the squares, you could say, \"Look, if I'm going from four \"to negative seven, I have to go down four \"just to get back to X equals zero, \"and then I have to go down another seven. \"So I have to go to the left 11 spaces.\" So that's negative 11. So that's my X component, negative 11. And what is my change in Y? Well I'm going from Y equals four. In fact, I'll start at this point right over here. I'm starting at Y equals four. And I'm ending up at Y is equal to, let me do that in that other color. So, I'm starting at Y is equal to four, and I'm ending up at Y is equal to negative eight. So our change in Y, our change in Y, what's going to be my final Y value, which is negative eight, minus my initial Y value, which is four, minus four, which is equal to negative 12. So negative 12. And you could see that here. If I'm starting up here, I have to go four down just to get back to the X axis. Then I have to go down another eight, so I have to go down a total of 12. And you can see something interesting that I've just set up here. You could also view this bigger vector. Vector AB is being constructed of this X, this vector that goes purely in the X direction, and this vector that goes purely in the Y direction. If you were to add this red vector to this blue-green, dark blue-green vector, you would get vector AB, but we'll talk more about that in future videos."
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.95084137,"math_prob":0.904786,"size":3080,"snap":"2019-51-2020-05","text_gpt3_token_len":798,"char_repetition_ratio":0.13426527,"word_repetition_ratio":0.06322795,"special_character_ratio":0.24837662,"punctuation_ratio":0.12820514,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.98977506,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2019-12-15T02:04:45Z\",\"WARC-Record-ID\":\"<urn:uuid:c5922549-111d-4f05-9878-c181fee6489e>\",\"Content-Length\":\"159114\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:bd4253bb-ae4f-47df-b4a8-fa313549d016>\",\"WARC-Concurrent-To\":\"<urn:uuid:cd4c6641-393d-4415-9a01-d1b2bf1b58f5>\",\"WARC-IP-Address\":\"151.101.249.42\",\"WARC-Target-URI\":\"https://da.khanacademy.org/math/precalculus/x9e81a4f98389efdf:vectors/x9e81a4f98389efdf:vectors-intro/v/example-finding-components-of-a-vector\",\"WARC-Payload-Digest\":\"sha1:D2ELRP5FEB5KGK4A7ML4HLFCQOYSJYSP\",\"WARC-Block-Digest\":\"sha1:JAQRHDOJE7NLOF5U2JZW3ZPZPCZPDOY7\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2019/CC-MAIN-2019-51/CC-MAIN-2019-51_segments_1575541301014.74_warc_CC-MAIN-20191215015215-20191215043215-00526.warc.gz\"}"} |
https://www.esaral.com/q/a-closely-wound-solenoid-of-2000-turns-and-area-of-cross-section-22168 | [
"",
null,
"# A closely wound solenoid of 2000 turns and area of cross-section",
null,
"Question:\n\nA closely wound solenoid of 2000 turns and area of cross-section 1.6 × 10−4 m2, carrying a current of 4.0 A, is suspended through its centre allowing it to turn in a horizontal plane.\n\n(a) What is the magnetic moment associated with the solenoid?\n\n(b) What is the force and torque on the solenoid if a uniform horizontal magnetic field of 7.5 × 10−2 T is set up at an angle of 30º with the axis of the solenoid?\n\nSolution:\n\nNumber of turns on the solenoid, n = 2000\n\nArea of cross-section of the solenoid, A = 1.6 × 10−4 m2\n\nCurrent in the solenoid, I = 4 A\n\n(a)The magnetic moment along the axis of the solenoid is calculated as:\n\nM = nAI\n\n= 2000 × 1.6 × 10−4 × 4\n\n= 1.28 Am2\n\n(b)Magnetic field, B = 7.5 × 10−2 T\n\nAngle between the magnetic field and the axis of the solenoid, θ = 30°\n\nTorque, $\\tau=M B \\sin \\theta$\n\n$=1.28 \\times 7.5 \\times 10^{-2} \\sin 30^{\\circ}$\n\n$=4.8 \\times 10^{-2} \\mathrm{Nm}$\n\nSince the magnetic field is uniform, the force on the solenoid is zero. The torque on the solenoid is $4.8 \\times 10^{-2} \\mathrm{Nm}$."
] | [
null,
"https://www.facebook.com/tr",
null,
"https://www.esaral.com/static/assets/images/Padho-Bharat-Web.jpeg",
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.834009,"math_prob":0.9973366,"size":1014,"snap":"2023-40-2023-50","text_gpt3_token_len":354,"char_repetition_ratio":0.18118812,"word_repetition_ratio":0.0,"special_character_ratio":0.35897437,"punctuation_ratio":0.11158799,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9994074,"pos_list":[0,1,2,3,4],"im_url_duplicate_count":[null,null,null,null,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2023-11-28T20:06:00Z\",\"WARC-Record-ID\":\"<urn:uuid:a3cc5336-daac-4552-8e7d-d0fe93ea950f>\",\"Content-Length\":\"66792\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:c7f9915e-f454-418b-9ada-2e35b200d8eb>\",\"WARC-Concurrent-To\":\"<urn:uuid:44293654-e231-49a1-99d1-87b8e95a55da>\",\"WARC-IP-Address\":\"104.26.12.203\",\"WARC-Target-URI\":\"https://www.esaral.com/q/a-closely-wound-solenoid-of-2000-turns-and-area-of-cross-section-22168\",\"WARC-Payload-Digest\":\"sha1:2F2ZZILERZYWBI5MXFDUDVPXIC57TJ5S\",\"WARC-Block-Digest\":\"sha1:IIHL3AYIPJZZ5RXXSAXIK2OZUV2W5P7X\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2023/CC-MAIN-2023-50/CC-MAIN-2023-50_segments_1700679099942.90_warc_CC-MAIN-20231128183116-20231128213116-00585.warc.gz\"}"} |
https://www.veo-music.de/ball_mill/9128.html | [
"[email protected]\nGet Latest Price\n\n## News\n\n1. Home\n2. / Calculation Of Reduction Ratio Ball Mill",
null,
"# Calculation Of Reduction Ratio Ball Mill\n\nFOB Reference Price: Get Latest Price",
null,
"Calculate the reduction ratio of ball mill. 250tph river stone crushing line in Chile. 200tph granite crushing line in Cameroon. 250tph limestone crushing line in Kenya. 250tph granite crushing line in South Africa. Kefid 120tph granite crushing line in Zimbabwe. 400tph crushing plant in Guinea.\n\nLAWFIRM Heavy Industries Co., Ltd. China(Mainland)\n\n## Hot Services\n\nOur products sell well all over the world, and have advanced technology in the field of crushing sand grinding powder.\n\nCOMPANY INFORMATION\n\nIf you have any requirements, suggestions and comments on our products, please leave a message! You will be replied as soon as you see the information. Thank you!",
null,
"• ### Calculate The Reduction Ratio Of Ball Mill\n\nBall Mill Reduction Ratio Industry Crusher Mills Cone. Calculations the reduction ratios of rod and ball mills were 6465 and 115 which show high discrepancies from design values 23 and 75 for rod and ball mills. Grinding In Ball Mills Modeling And Process Control.\n\n• ### Calculate The Reduction Ratio Of Ball Mill\n\nCalculate The Reduction Ratio Of Ball Mill. 2019-11-15motor sizingroper sizing and selection of a motor for your equipment is key to ensuring performance, reliability and cost of the equipmentn addition to the information below for properly sizing a motor, oriental motor.\n\n• ### Calculation Of The Ball Mill Reduction Ratio Meipaly\n\nCalculation Of Reduction Ratio Ball Mill. Calculation of reduction ratio ball mill archive of sid calculations the reduction ratios of rod and ball mills were 6465 and 115 which show high the ball mill is increased and therefore its reduction ratio is higher read more ball mill circulating load calculation youtube . Click to view.\n\n• ### Ball Mill Reduction Ratio Industry\n\nReduction ratio of ball mill Calculation Of The Ball Mill Reduction Ratiol. Libsysdigilibraryillinoisedu Calculation Of The Ball Mill Reduction Ratiol 2009-6-27The net reduction in crossings at grade during the year 1961 resulting from rail line abandonment reloca- tion of highways closing of crossings or building of separations was 699.\n\n• ### Calculate The Reduction Ratio Of Ball Mill In Malaysia\n\nThe mill is used primarily to lift the load medium and charge additional power is required to keep the mill rotating 813 power drawn by ball semiautogenous and autogenous mills a simplified picture of the mill load is shown in figure 83 ad this can be use,Calculate The Reduction Ratio Of Ball Mill In Malaysia.\n\n• ### Calculation Of Reduction Ratio Ball Mill\n\nCalculate the reduction ratio of ball mill calculate the reduction ratio of ball mill calculate the reduction ratio of ball mill Mill Throughput Capacity The Bond tests was developped for rod and ball milling when those , 15, ENERGY REQUIREMENTS CALCULATION Ball Mill Reduction Ratio, RR, 113 Contact US modeling the specific grinding energy and ball mill scaleup, draw P, which.\n\n• ### Calculation Of The Ball Mill Reduction Ratio Henan\n\nCalculate the reduction ratio of ball mill calculation of reduction ratio ball mill calculation of reduction ratio ball mill there is a rapid and easy way to calculate it from any set of circuit size distribution data for Get Price. Emailquerysinoftm.com.\n\n• ### Amit 135 Lesson 8 Rod Mills Mining Mill Operator Training\n\nMill Characteristics length, diameter, rotation speed, lifters Feed Characteristics work index Reduction Ratio Under given load and particle size requirement, capacity is a function of mill length and diameter Q kLD 2N. N is related to mill diameter which decreases with larger diameters k a constant equal to 207 4.\n\n• ### Optimum Choice Of The Makeup Ball Sizes For Maximum\n\nSep 01, 2013018332As the size reduction ratio increases, the optimum ball ratio moves towards more small balls. At the finest grinding with a size reduction ratio of 1281 Fig. 7d, a 50.8 mm25.4 mm ball mix at a 1387 ratio was found to be the optimum mix. This indicates that the finer the product size, the higher the proportion of smaller balls that is required.\n\n• ### Ball Mill Reduction Ratio Henan Fumine Heavy Industries\n\nAs the sie reduction ratio increases the optimum ball ratio moves towards more small balls. At the finest grinding with a sie reduction ratio of 1281 Fig. 7d a 50.8 mm25.4 mm ball mix at a 1387 ratio was found to be the optimum mix. This indicates that the finer the product sie the higher the proportion of smaller balls that is required.\n\n• ### Bond Ball Mill Grindability Test Golden Ratio Guinea\n\nBond Ball Mill Index Test Scalepaintdioramas. bond ball mill grindability test golden ratio 49 8452 Ratings The Gulin product line consisting of more than 30 machines sets the standard for our industry the ball mill calculation A Bond Ball Mill Index Test which show high the ball mill is increased and therefore its reduction ratio is on the Bond ball mill.\n\n• ### Calculate The Reduction Ratio Of Ball Mill\n\nBall Mill Reduction Ratio Kenya - truhlarstvi-zadovice.cz. calculate the reduction ratio of ball mill. Wet grinding ball mills for the treatment of minerals ores and other bulk materials for the wet The Bond formular permits rapid accurate power calculation and selection of the most mm rod or 4 mm ball EF6 Reduction ratio rod mill Read More. ball mill reduction ratio Grinding Mill China.\n\n• ### Reduction Ratio Ball Mill Futurehuntin\n\nReduction Ratio Ball Mill. Ideal reduction ratio grinding ,calculation in filling ratio for ball mill,size reduction machines,dual planetary ball mill ,question is lengthdiameter ratio of a ball mill is ,size reduction milling applications ,modeling the specific grinding energy and ball,grinding in ball mills modeling and process control,mineral product monorail reduction gear synopsisthe main.\n\n• ### Reduction Ratio An Overview Sciencedirect Topics\n\nFriction reduction ratio is the function of the average velocity of fracturing fluid, the gelled agent concentration, and the proppant concentration. Based on the linear regression of 1049 experimental and field data, Lord et al. put forward the following empirical formula to calculate the friction reduction ratio of HPG fracturing fluid Lord, 1987.\n\n• ### How To Calculate Crusher Reduction Ratio Colombia\n\nCrusher Size Reduction Ratio Calculation Method. Generally every crusher machine is not the same here are several common crusher size reduction ratio The impact crusher size reduction ratio is 20 to 1 The vertical shaft impact crusher size reduction ratio is 48 to 1 The vertical roller mill size reduction ratio is 225 to 1 The hammer crusher size reduction ratio is 20 to 1 Pre ArticleCrusher.\n\n• ### What Is Reduction Ratio In Ball Milling\n\nBall milling and ultrasonication were used to reduce the particle size and distribution During ball milling the weight grams ratio of ballstoclay particles was 10025 and the milling operation was run for 24 hours The effect of different types of balls on particle size reduction and.\n\nProducts Category\nLatest Solutions\nRealted News"
] | [
null,
"https://www.veo-music.de/images/picture/8.jpg",
null,
"https://www.veo-music.de/images/dianji.gif",
null,
"https://www.veo-music.de/images/msg-pic02.png",
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.80490327,"math_prob":0.9432982,"size":528,"snap":"2020-45-2020-50","text_gpt3_token_len":127,"char_repetition_ratio":0.20038168,"word_repetition_ratio":0.0,"special_character_ratio":0.22537878,"punctuation_ratio":0.13541667,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.97623515,"pos_list":[0,1,2,3,4,5,6],"im_url_duplicate_count":[null,2,null,5,null,5,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2020-12-03T19:21:06Z\",\"WARC-Record-ID\":\"<urn:uuid:98474eb6-d7ff-4030-960d-a9744feeea1f>\",\"Content-Length\":\"24410\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:163e09b3-15bb-40d1-a79a-c10ecdabec91>\",\"WARC-Concurrent-To\":\"<urn:uuid:974eb60e-7d56-4ce2-8a9f-4eee98fabac2>\",\"WARC-IP-Address\":\"104.24.125.182\",\"WARC-Target-URI\":\"https://www.veo-music.de/ball_mill/9128.html\",\"WARC-Payload-Digest\":\"sha1:IU477FZAOC6XO27YKVSFG364QILHCNBV\",\"WARC-Block-Digest\":\"sha1:XJXVNSJXRK4FRWHV2GJYGXIV7FC2OIWZ\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2020/CC-MAIN-2020-50/CC-MAIN-2020-50_segments_1606141732696.67_warc_CC-MAIN-20201203190021-20201203220021-00279.warc.gz\"}"} |
https://www.investopedia.com/terms/d/degreeofoperatingleverage.asp | [
"## What Is the Degree of Operating Leverage (DOL)?\n\nThe degree of operating leverage (DOL) is a multiple that measures how much the operating income of a company will change in response to a change in sales. Companies with a large proportion of fixed costs (or costs that don't change with production) to variable costs (costs that change with production volume) have higher levels of operating leverage.\n\nThe DOL ratio assists analysts in determining the impact of any change in sales on company earnings or profit.\n\n## Formula and Calculation of Degree of Operating Leverage\n\n \\begin{aligned} &DOL = \\frac{\\% \\text{ change in }EBIT}{\\% \\text{ change in sales}} \\\\ &\\textbf{where:}\\\\ &EBIT=\\text{earnings before income and taxes}\\\\ \\end{aligned}\n\nThere are a number of alternative ways to calculate the DOL, each based on the primary formula given above:\n\n $\\text{Degree of operating leverage} = \\frac{\\text{change in operating income}}{\\text{changes in sales}}$\n\n $\\text{Degree of operating leverage} = \\frac{\\text{contribution margin }}{\\text{operating income}}$\n\n $\\text{Degree of operating leverage} = \\frac{\\text{sales -- variable costs}}{\\text{sales -- variable costs -- fixed costs}}$\n\n $\\text{Degree of operating leverage} = \\frac{\\text{contribution margin percentage}}{\\text{operating margin}}$\n\n### Key Takeaways\n\n• The degree of operating leverage measures how much a company's operating income changes in response to a change in sales.\n• The DOL ratio assists analysts in determining the impact of any change in sales on company earnings.\n• A company with high operating leverage has a large proportion of fixed costs, meaning a big increase in sales can lead to outsized changes in profits.\n2:27\n\n## What the Degree of Operating Leverage Can Tell You\n\nThe higher the degree of operating leverage (DOL), the more sensitive a company’s earnings before interest and taxes (EBIT) are to changes in sales, assuming all other variables remain constant. The DOL ratio helps analysts determine what the impact of any change in sales will be on the company’s earnings.\n\nOperating leverage measures a company’s fixed costs as a percentage of its total costs. It is used to evaluate a business’ breakeven point—which is where sales are high enough to pay for all costs, and the profit is zero. A company with high operating leverage has a large proportion of fixed costs—which means that a big increase in sales can lead to outsized changes in profits. A company with low operating leverage has a large proportion of variable costs—which means that it earns a smaller profit on each sale, but does not have to increase sales as much to cover its lower fixed costs.\n\n## Example of How to Use Degree of Operating Leverage\n\nAs a hypothetical example, say Company X has $500,000 in sales in year one and$600,000 in sales in year two. In year one, the company's operating expenses were $150,000, while in year two, the operating expenses were$175,000.\n\n \\begin{aligned} &\\text{Year one }EBIT = \\500,000 - \\150,000 = \\350,000 \\\\ &\\text{Year two }EBIT = \\600,000 - \\175,000 = \\425,000 \\\\ \\end{aligned}\n\nNext, the percentage change in the EBIT values and the percentage change in the sales figures are calculated as:\n\n \\begin{aligned} \\% \\text{ change in }EBIT &= (\\425,000 \\div \\350,000) - 1 \\\\ &= 21.43\\% \\\\ \\% \\text{ change in sales} &= (\\600,000 \\div \\500,000) -1 \\\\ &= 20\\% \\\\ \\end{aligned}\n\nLastly, the DOL ratio is calculated as:\n\n \\begin{aligned} DOL &= \\frac{\\% \\text{ change in operating income}}{\\% \\text{ change in sales}} \\\\ &= \\frac{21.43\\%}{ 20\\%} \\\\ &= 1.0714 \\\\ \\end{aligned}\n\n## The Difference Between Degree of Operating Leverage and Degree of Combined Leverage\n\nThe degree of combined leverage (DCL) extends the degree of operating leverage to get a fuller picture of a company's ability to generate profits from sales. It multiplies DOL by degrees of financial leverage (DFL) weighted by the ratio of %change in earnings per share (EPS) over %change in sales:\n\n $DCL = \\frac{\\% \\text{ change in }EPS}{\\% \\text{ change in sales}} = DOL \\times DFL$\n\nThis ratio summarizes the effects of combining financial and operating leverage, and what effect this combination, or variations of this combination, has on the corporation's earnings. Not all corporations use both operating and financial leverage, but this formula can be used if they do. A firm with a relatively high level of combined leverage is seen as riskier than a firm with less combined leverage because high leverage means more fixed costs to the firm. (For related reading, see \"How Do I Calculate the Degree of Operating Leverage?\")"
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.93356335,"math_prob":0.97853875,"size":4077,"snap":"2021-31-2021-39","text_gpt3_token_len":891,"char_repetition_ratio":0.2101645,"word_repetition_ratio":0.12792511,"special_character_ratio":0.22173166,"punctuation_ratio":0.07919463,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9957306,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2021-07-23T17:02:38Z\",\"WARC-Record-ID\":\"<urn:uuid:bbdd290d-3a16-4f05-9c64-19016cd4e677>\",\"Content-Length\":\"149661\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:14ab890e-f3bc-4e53-b1c0-fe9f71db3bb5>\",\"WARC-Concurrent-To\":\"<urn:uuid:18a867c9-069a-4fd3-870f-8cbce738b35f>\",\"WARC-IP-Address\":\"151.101.250.137\",\"WARC-Target-URI\":\"https://www.investopedia.com/terms/d/degreeofoperatingleverage.asp\",\"WARC-Payload-Digest\":\"sha1:B7PR2DYVEB7CPKKXOV4YPPUXANT3UCXP\",\"WARC-Block-Digest\":\"sha1:GKQ2NBDGC7HVY7KI3E37O2V7FHV2BK3T\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2021/CC-MAIN-2021-31/CC-MAIN-2021-31_segments_1627046149929.88_warc_CC-MAIN-20210723143921-20210723173921-00008.warc.gz\"}"} |
https://metacademy.org/graphs/concepts/representability_in_arithmetic | [
"# representability in arithmetic\n\n## Summary\n\nA relation is definable in a first-order theory T if there is a formula f expressible in the language of T, such that f(x) is provable in T whenever x is in R; otherwise the negation must be provable. It can be shown that the functions representable in arithmetic are exactly those functions which are recursive, or equivalently, computable. The notion of representability is used to construct self-referential sentences in the proof of Godel's Incompleteness Theorem.\n\n## Context\n\nThis concept has the prerequisites:\n\n## Goals\n\n• Define a system of axioms for basic arithmetic in first-order logic\n• Define what it means for functions and relations to be representable in a logical theory\n• Be able to show that simple arithmetic functions are representable in arithmetic (using a suitable set of axioms)\n• Show that the set of functions representable in arithmetic is closed under composition\n• Show that there is a representable encoding of tuples of numbers into single numbers"
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.8964236,"math_prob":0.9002543,"size":1558,"snap":"2019-51-2020-05","text_gpt3_token_len":323,"char_repetition_ratio":0.16216215,"word_repetition_ratio":0.0,"special_character_ratio":0.19127086,"punctuation_ratio":0.06640625,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.99671084,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2019-12-13T20:40:03Z\",\"WARC-Record-ID\":\"<urn:uuid:6bb73d50-7d00-4510-ab72-877b5523b73c>\",\"Content-Length\":\"37346\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:6f9db8e9-6820-4857-9307-a53e23c45304>\",\"WARC-Concurrent-To\":\"<urn:uuid:a5fdfd5f-4db2-4cdf-b24c-74bf58859418>\",\"WARC-IP-Address\":\"192.249.62.163\",\"WARC-Target-URI\":\"https://metacademy.org/graphs/concepts/representability_in_arithmetic\",\"WARC-Payload-Digest\":\"sha1:MSSNDQG3CJPWDRAGP2CIWHPZH52HYPPN\",\"WARC-Block-Digest\":\"sha1:4Q3C3XRCFICGHJX3DB7XZNEP4FXMN24R\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2019/CC-MAIN-2019-51/CC-MAIN-2019-51_segments_1575540569146.17_warc_CC-MAIN-20191213202639-20191213230639-00266.warc.gz\"}"} |
https://www.ximpledu.com/solving-polynomial-equations/ | [
"",
null,
"Solving Polynomial Equations",
null,
"How to solve polynomial equations by using the synthetic division: example and its solution.\n\nExample",
null,
"Factor the polynomial\nto find the roots of the equation.\n\nThe roots are the numbers\nthat make the remainder of the synthetic division 0.\n\nUse the synthetic division.\n(divisor's zero: 1)\n\nThe remainder is 0.\nSo 1 is the root of the equation.\n\nFactor theorem\n\nUse the synthetic division.\n(divisor's zero: 1)\n\nThe remainder is 0.\nSo another 1 is the root of the equation.\n\nUse the synthetic division.\n(divisor's zero: -2)\n\nThe remainder is 0.\nSo -2 is the root of the equation.\n\nUse the synthetic division.\n(divisor's zero: -4)\n\nThe remainder is 0.\nSo -4 is the root of the equation.\n\nWhen doing the synthetic division\nto solve polynomial equations,\n\nit's good to use the division thorough\n(until the constant term remains)\n\nto prevent finding the wrong root:\n\nyou might say that 4 is the root, which is wrong.\n\nThe roots are 1, 1, -2, and 4.\n\nSo x = 1, -2, -4."
] | [
null,
"https://www.ximpledu.com/logo-01.png",
null,
"https://www.ximpledu.com/solving-polynomial-equations/solving-polynomial-equations-thm-01.png",
null,
"https://www.ximpledu.com/solving-polynomial-equations/solving-polynomial-equations-01-01.png",
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.85121363,"math_prob":0.9991516,"size":972,"snap":"2019-43-2019-47","text_gpt3_token_len":249,"char_repetition_ratio":0.18904959,"word_repetition_ratio":0.2366864,"special_character_ratio":0.25411522,"punctuation_ratio":0.15270936,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.99996376,"pos_list":[0,1,2,3,4,5,6],"im_url_duplicate_count":[null,null,null,1,null,1,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2019-10-23T13:18:43Z\",\"WARC-Record-ID\":\"<urn:uuid:07853cbc-5348-4c33-9f7d-c69417a51294>\",\"Content-Length\":\"17823\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:7ab5512f-b72f-4720-b55c-e26e19f0b4c4>\",\"WARC-Concurrent-To\":\"<urn:uuid:0e2db27c-d2c0-48b6-a41b-1910eb52107f>\",\"WARC-IP-Address\":\"146.66.109.202\",\"WARC-Target-URI\":\"https://www.ximpledu.com/solving-polynomial-equations/\",\"WARC-Payload-Digest\":\"sha1:5IWD2QLAEVSGSQFYDCWX2FPT5B2G66KQ\",\"WARC-Block-Digest\":\"sha1:XFYDC7HNWRF6WC4PFJ2B3FPCCLXUN256\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2019/CC-MAIN-2019-43/CC-MAIN-2019-43_segments_1570987833766.94_warc_CC-MAIN-20191023122219-20191023145719-00249.warc.gz\"}"} |
https://stacks.math.columbia.edu/tag/00M7 | [
"## 10.76 Functorialities for Tor\n\nIn this section we briefly discuss the functoriality of $\\text{Tor}$ with respect to change of ring, etc. Here is a list of items to work out.\n\n1. Given a ring map $R \\to R'$, an $R$-module $M$ and an $R'$-module $N'$ the $R$-modules $\\text{Tor}_ i^ R(M, N')$ have a natural $R'$-module structure.\n\n2. Given a ring map $R \\to R'$ and $R$-modules $M$, $N$ there is a natural $R$-module map $\\text{Tor}_ i^ R(M, N) \\to \\text{Tor}_ i^{R'}(M \\otimes _ R R', N \\otimes _ R R')$.\n\n3. Given a ring map $R \\to R'$ an $R$-module $M$ and an $R'$-module $N'$ there exists a natural $R'$-module map $\\text{Tor}_ i^ R(M, N') \\to \\text{Tor}_ i^{R'}(M \\otimes _ R R', N')$.\n\nLemma 10.76.1. Given a flat ring map $R \\to R'$ and $R$-modules $M$, $N$ the natural $R$-module map $\\text{Tor}_ i^ R(M, N)\\otimes _ R R' \\to \\text{Tor}_ i^{R'}(M \\otimes _ R R', N \\otimes _ R R')$ is an isomorphism for all $i$.\n\nProof. Omitted. This is true because a free resolution $F_\\bullet$ of $M$ over $R$ stays exact when tensoring with $R'$ over $R$ and hence $(F_\\bullet \\otimes _ R N)\\otimes _ R R'$ computes the Tor groups over $R'$. $\\square$\n\nThe following lemma does not seem to fit anywhere else.\n\nLemma 10.76.2. Let $R$ be a ring. Let $M = \\mathop{\\mathrm{colim}}\\nolimits M_ i$ be a filtered colimit of $R$-modules. Let $N$ be an $R$-module. Then $\\text{Tor}_ n^ R(M, N) = \\mathop{\\mathrm{colim}}\\nolimits \\text{Tor}_ n^ R(M_ i, N)$ for all $n$.\n\nProof. Choose a free resolution $F_\\bullet$ of $N$. Then $F_\\bullet \\otimes _ R M = \\mathop{\\mathrm{colim}}\\nolimits F_\\bullet \\otimes _ R M_ i$ as complexes by Lemma 10.12.9. Thus the result by Lemma 10.8.8. $\\square$\n\nIn your comment you can use Markdown and LaTeX style mathematics (enclose it like $\\pi$). A preview option is available if you wish to see how it works out (just click on the eye in the toolbar)."
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.55343837,"math_prob":0.999969,"size":2275,"snap":"2023-40-2023-50","text_gpt3_token_len":800,"char_repetition_ratio":0.15455747,"word_repetition_ratio":0.30649352,"special_character_ratio":0.3534066,"punctuation_ratio":0.107074566,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":1.0000082,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2023-12-11T06:13:22Z\",\"WARC-Record-ID\":\"<urn:uuid:a94ed9e2-c644-4bd6-a9e5-ab2e877c724a>\",\"Content-Length\":\"15205\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:1f37c5e5-2b99-4fb5-8870-4427cddc7c4b>\",\"WARC-Concurrent-To\":\"<urn:uuid:c7eec86b-03bc-424d-8ac9-7f4342815188>\",\"WARC-IP-Address\":\"128.59.222.85\",\"WARC-Target-URI\":\"https://stacks.math.columbia.edu/tag/00M7\",\"WARC-Payload-Digest\":\"sha1:HO45W62CEBATXDMBOJNEHJHRHCNWSWJZ\",\"WARC-Block-Digest\":\"sha1:TV4ZGEPJP7CPPYNNU7NYR2EAWZSF347P\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2023/CC-MAIN-2023-50/CC-MAIN-2023-50_segments_1700679103558.93_warc_CC-MAIN-20231211045204-20231211075204-00893.warc.gz\"}"} |
https://www.indeoudemelkput.nl/24404+in_a_car_lift_compressed_air_exerts_a_force.html | [
" in a car lift compressed air exerts a force\n\n## in a car lift compressed air exerts a force\n\n• ### In a car lift compressed air exerts a force f1 on a small ...\n\nIn a car lift compressed air exerts a force f1 on a small piston having a radius of 5 cm.this pressure is transmitted to a second piston of radius 15 cm.if the mass of the car to be lifted is 1350 kg what is f1?what is the pressure necessary to accomplish this task?take g=9.8ms^-2\n\n• ### Solved: In A Car Lift Used In A Service Station, Compresse ...\n\nIn a car lift used in a service station, compressed air exerts a force on a small piston that has a circular cross section and a radius of 5.00 cm. The pressure is transmitted by a liquid to a piston that has a radius of 15.0 cm. a) What force must the compressed air exert to lift a car weighing 13,300N?\n\n• ### help!!!! Physics question? | Yahoo Answers\n\nMar 28, 2011· A>>>>> In a car lift used in a service station, com- pressed air exerts a force on a small piston of circular cross-section having a radius of 3.36 cm. This pressure is transmitted by a liquid to a second piston of radius 28.4 cm. What force must the compressed air exert in order to lift a car weighing 14600 N?\n\n• ### In a car lift used in a service station, compressed air ...\n\nIn a car lift used in a service station, compressed air exerts a forcé on a small piston that has a circular cross section and a radius of 5cm. This pressure is transmitted by a liquid to a piston that has a radius of 15cm. What forcé must the compressed air exert to lift a car weighing 13,300N? What air pressure produces this force ?\n\n• ### Fluid Mechanics - 203PHYS\n\nJan 10, 2019· Example 2 – The car lift • In a car lift used in a service station, compressed air exerts a force on a small piston that has a circular cross section and a radius of 5.00 cm. This pressure is transmitted by a liquid to a piston that has a radius of 15.0 cm. (a) What force must the compressed air exert to lift a car weighing 13,300 N?\n\n• ### 02: Chapter 2 / Physics Part-II - Philoid\n\nExample 10.6 In a car lift compressed air exerts a force F1 on a small piston having a radius of 5.0 cm. This pressure is transmitted to a second piston of radius 15 cm (Fig 10.7). If the mass of the car to be lifted is 1350 kg, calculate F1.\n\n• ### Solved: 4) In A Car Lift Used In A Service Station, Compre ...\n\nDec 09, 2020· 4) In a car lift used in a service station, compressed air exerts a force on a small piston that has a circular cross section and a radius of 4 cm. This pressure is transmitted by a liquid to a piston that has a radius of 20 cm. Determine the weight of a car that can be lifted when the air pressure applied to the small piston is 200 kPa.\n\n• ### In a car lift used in a service station compressed air ...\n\nIn a car lift used in a service station, compressed air exerts a force on a small piston of circular cross section having a radius of r 1 = 5 cm. This pressure is transmitted by an incompressible liquid to a second piston of radius r 2 = 15 cm. (a) What force must the compressed air exert on the small piston to lift a car weighing 13300 N (b) What air pressure will produce a force of that ...\n\n• ### In a car lift used in a service station, compressed air ...\n\nNov 11, 2019· In a car lift used in a service station, compressed air exerts a force on a small piston that has a circular cross section and a radius of 5.00 cm. The pressure is transmitted by a liquid to a piston that has a radius of 15.0 cm. a) What force must the compressed air exert to lift a car …\n\n• ### In A Car Lift Used In A Service Station, Compresse ...\n\nQuestion: In A Car Lift Used In A Service Station, Compressed Air Exerts A Force On A Small Piston Of Circular Cross Section Having A Radius Of Ra = 5 Cm. This Pressure Is Transmitted By An Incompressible Liquid To A Second Piston Of Radius R2 = 15 Cm. What Force Must The Compressed Air Exert On The Small Piston In Order To Lift A Car Weighing 12,000 N?\n\n• ### Solved: In A Car Lift Used In A Service Station, Compresse ...\n\nIn a car lift used in a service station, compressed air exerts a force on a small piston of circular cross-section having a radium of 3.67cm. This pressure is transmitted by a liquid to a second piston of radius 25.2cm. What force must the compressed air exert in order to lift a car weighing 13400N and what air pressure will produce this force?\n\n• ### (Solved) - In a car lift used in a service station ...\n\nApr 02, 2012· In a car lift used in a service station, compressed air exerts a force on a small piston that has a circular cross section and a radius of 5.00 cm. The pressure is transmitted by a liquid to a piston that has a radius of 15.0 cm. a) What force must the compressed air exert to lift a car …\n\n• ### In a car lift compressed air exerts a force F, on a small ...\n\nIn a car lift compressed air exerts a force F1 on a small piston having a radius of 5 cm. asked Jan 1 in Physics by Rajneesh01 (26.0k points) mechanical properties of fluids; class-11; 0 votes. 1 answer. In a hydraulic lift air exerts a force F on a small piston of radius 5 cm. The pressure is transmitted to the second piston of radius 15 cm.\n\n• ### In a car lift, compressed air exerts a force F1 on a small ...\n\nIn a car lift, compressed air exerts a force F1 on a small piston having a radius of 5 cm. This pressure is transmitted to a second piston of radius 15 cm. If the mass of the car to be lifted is 1350 kg, what is F1 ?\n\n• ### JEE Main, JEE Advanced, CBSE, NEET, IIT, free study ...\n\n(i) The compressed air in a tyre exerts a force large enough to lift a heavy car. (ii) In a syringe, the plunger does not compress the liquid. Pressure is applied on the liquid causing it to flow out.\n\n• ### PRESSURE AND PASCAL'S LAW 1. In a car lift compressed air ...\n\nIn a car lift compressed air exerts a force F, on a small piston having a radius of 5cm. This pressure is transmitted to a second piston of radius 15cm. If the mass of the car to be lifted is 1350 kg. What is F.? D) 14.7 x10'N 2)1.47x10°N 3)2.47x10'N 4)24.7x10' N. Video Explanation. Answer.\n\n• ### In a car lift used in a service station, compressed air ...\n\nIn a car lift used in a service station, compressed air exerts a force on a small piston of circular cross-section having a radius of 3.11 cm. This pressure is transmitted …\n\n• ### In a car lift used in a service station, compressed air ...\n\nIn a car lift used in a service station, compressed air exerts a force on a small piston of circular cross section having a radius of r1 = 5.10 cm.\n\n• ### In a car lift compressed air exerts a force F1 on a small ...\n\nIn a car lift compressed air exerts a force F 1 on a small piston having a radius of 5 c m. This pressure is transmitted to a second piston of radius 1 5 c m . If the mass of the car to be lifted is 1 3 5 0 k g .\n\n• ### Chapter 9\n\nIn a car lift used in a service station, compressed air exerts a force on a small piston of circular cross section having a radius of 5.00 cm. This pressure is transmitted by an incompressible liquid to a second piston of radius 15.0 cm. (a) what force must the compressed air exert in order to lift a car weighing 13,300 N? (b) What air\n\n• ### ExtraProbPhys2Ch1-MecaFluid - PHYSICS 2 CHAPTER 1 ...\n\nIn a car lift used in a service station, compressed air exerts a force on a small piston that has a circular cross section and a radius of 5.00 cm. This pressure is transmitted by a liquid to a piston that has a radius of 15.0 cm. What force must the compressed air exert to lift a car weighing 13300 N? What air pressure produces this force?\n\n• ### (Solved) - In a car lift used in a service station ...\n\nIn a car lift used in a service station, compressed air exerts a force on a small piston that has a circular cross section and a radius of 5.00 cm. The pressure is transmitted by a liquid to a piston that has a radius of 15.0 cm. a) What force must the compressed air exert to lift a car weighing 13,...\n\n• ### Study Phy II QI Flashcards | Quizlet\n\nIn a car lift used in a service station, compressed air exerts a force on a small piston of circular cross section having a radius of r1=5cm. This pressure is transmitted by an incompressible liquid to a second piston of radius r2=15cm. (a)What force must the compressed air exert on the small piston in order to lift a car weighing 13,300N?\n\n• ### Spring 2002 Lecture #3 - University of Texas at ...\n\nIn a car lift used in a service station, compressed air exerts a force on a small piston that has a circular cross section and a radius of 5.00cm. This pressure is transmitted by a liquid to a piston that has a radius of 15.0cm. What force must the compressed air exert to lift a car weighing 13,300N? What air pressure produces this force?\n\n• ### in a car lift, compressed air exerts a force on a piston ...\n\nMay 07, 2007· The compressed air must exert a force greater than 1.477x10^3N because the ratio of piston surface areas is 9:1 (15/2)^2 / (5/2)^2 = 9 Pressure must be in excess of 236.44N/cm^2 or 23.644 bar. The 236.44 comes from 13300N / (15/2)^2 cm which is of course also 1477.77N / (5/2)^2 cm (equal pressure for the two pistons, different forces ...\n\n• ### Solved: In A Car Lift Used In A Service Station, Compresse ...\n\nIn a car lift used in a service station, compressed air exerts a force on a small piston of circular cross section having a radius of r 1 = 5.45 cm. This pressure is transmitted by an incompressible liquid to a second piston of radius 13.6 cm.\n\n• ### In a car lift, compressed air exerts a force on a piston ...\n\nMar 16, 2009· In a car lift, compressed air exerts a force on a piston with a radius of 1.47 cm. This pressure is transmitted to a second piston with a radius of 12.9 cm. A- How large a force must the compressed air exert to lift 13900 N car? Answer in units of N. B- What pressure produces this force? Neglect the weight of the pistons. Answer in units of Pa.\n\n• bendpak single post car lift\n• gondola lift vs cable car\n• car ramp with hydraulic lift\n• a car is on a hydraulic lift unbeknownst to the operator the car s roof is alrea\n• lift kit for club car\n• power car jack lift\n• used hydraulic car lift for sale\n• spider 2500 car lift\n• car door lift handle\n• car lift for sale philippines\n• underground car lift price\n• the tailgate of a car is supported by the hydraulic lift bc if the lift exerts\n• golf cart lift kits for club car\n• moving a 4 post car lift\n• 4 post car lift space requirements\n• how much does a car lift cost\n• smart car hydraulic lift system\n• high pitched whine under car sounds like hydraulic lift\n• 2 post car lift installation requirements\n• bradock 5 series portable car lift"
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.9030194,"math_prob":0.8609823,"size":8208,"snap":"2021-31-2021-39","text_gpt3_token_len":2152,"char_repetition_ratio":0.23122866,"word_repetition_ratio":0.5840598,"special_character_ratio":0.272539,"punctuation_ratio":0.098378375,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9843673,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2021-09-21T22:35:48Z\",\"WARC-Record-ID\":\"<urn:uuid:3ad7b4d7-fc4d-4367-b556-5f53b8a59d4c>\",\"Content-Length\":\"29245\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:54534103-611e-4c9e-b06a-5fbc95956257>\",\"WARC-Concurrent-To\":\"<urn:uuid:0409121f-bc99-4aea-aed6-7e210b304086>\",\"WARC-IP-Address\":\"172.67.217.32\",\"WARC-Target-URI\":\"https://www.indeoudemelkput.nl/24404+in_a_car_lift_compressed_air_exerts_a_force.html\",\"WARC-Payload-Digest\":\"sha1:RASRN6BQ7PORKUXRPL2Z4S472OIRNTUD\",\"WARC-Block-Digest\":\"sha1:4RQSPLGJWZSMJTQWSVBHU4BUJMR6IQJM\",\"WARC-Identified-Payload-Type\":\"application/xhtml+xml\",\"warc_filename\":\"/cc_download/warc_2021/CC-MAIN-2021-39/CC-MAIN-2021-39_segments_1631780057274.97_warc_CC-MAIN-20210921221605-20210922011605-00214.warc.gz\"}"} |
https://stats.libretexts.org/Bookshelves/Applied_Statistics/Learning_Statistics_with_R_-_A_tutorial_for_Psychology_Students_and_other_Beginners_(Navarro)/17%3A_Bayesian_Statistics/17.02%3A_Bayesian_Hypothesis_Tests | [
"# 17.2: Bayesian Hypothesis Tests\n\n$$\\newcommand{\\vecs}{\\overset { \\rightharpoonup} {\\mathbf{#1}} }$$ $$\\newcommand{\\vecd}{\\overset{-\\!-\\!\\rightharpoonup}{\\vphantom{a}\\smash {#1}}}$$$$\\newcommand{\\id}{\\mathrm{id}}$$ $$\\newcommand{\\Span}{\\mathrm{span}}$$ $$\\newcommand{\\kernel}{\\mathrm{null}\\,}$$ $$\\newcommand{\\range}{\\mathrm{range}\\,}$$ $$\\newcommand{\\RealPart}{\\mathrm{Re}}$$ $$\\newcommand{\\ImaginaryPart}{\\mathrm{Im}}$$ $$\\newcommand{\\Argument}{\\mathrm{Arg}}$$ $$\\newcommand{\\norm}{\\| #1 \\|}$$ $$\\newcommand{\\inner}{\\langle #1, #2 \\rangle}$$ $$\\newcommand{\\Span}{\\mathrm{span}}$$ $$\\newcommand{\\id}{\\mathrm{id}}$$ $$\\newcommand{\\Span}{\\mathrm{span}}$$ $$\\newcommand{\\kernel}{\\mathrm{null}\\,}$$ $$\\newcommand{\\range}{\\mathrm{range}\\,}$$ $$\\newcommand{\\RealPart}{\\mathrm{Re}}$$ $$\\newcommand{\\ImaginaryPart}{\\mathrm{Im}}$$ $$\\newcommand{\\Argument}{\\mathrm{Arg}}$$ $$\\newcommand{\\norm}{\\| #1 \\|}$$ $$\\newcommand{\\inner}{\\langle #1, #2 \\rangle}$$ $$\\newcommand{\\Span}{\\mathrm{span}}$$$$\\newcommand{\\AA}{\\unicode[.8,0]{x212B}}$$\n\nIn Chapter 11 I described the orthodox approach to hypothesis testing. It took an entire chapter to describe, because null hypothesis testing is a very elaborate contraption that people find very hard to make sense of. In contrast, the Bayesian approach to hypothesis testing is incredibly simple. Let’s pick a setting that is closely analogous to the orthodox scenario. There are two hypotheses that we want to compare, a null hypothesis h0 and an alternative hypothesis h1. Prior to running the experiment we have some beliefs P(h) about which hypotheses are true. We run an experiment and obtain data d. Unlike frequentist statistics Bayesian statistics does allow to talk about the probability that the null hypothesis is true. Better yet, it allows us to calculate the posterior probability of the null hypothesis, using Bayes’ rule:\n\n$$\\ P(h_0 | d) = \\dfrac{P(d | h_0)P(h_0)}{P(d)}$$\n\nThis formula tells us exactly how much belief we should have in the null hypothesis after having observed the data d. Similarly, we can work out how much belief to place in the alternative hypothesis using essentially the same equation. All we do is change the subscript:\n\n$$\\ P(h_1 | d) = \\dfrac{P(d | h_1)P(h_1)}{P(d)}$$\n\nIt’s all so simple that I feel like an idiot even bothering to write these equations down, since all I’m doing is copying Bayes rule from the previous section.259\n\n## Bayes factor\n\nIn practice, most Bayesian data analysts tend not to talk in terms of the raw posterior probabilities P(h0|d) and P(h1|d). Instead, we tend to talk in terms of the posterior odds ratio. Think of it like betting. Suppose, for instance, the posterior probability of the null hypothesis is 25%, and the posterior probability of the alternative is 75%. The alternative hypothesis is three times as probable as the null, so we say that the odds are 3:1 in favour of the alternative. Mathematically, all we have to do to calculate the posterior odds is divide one posterior probability by the other:\n\n$$\\ \\dfrac{P(h_1 | d)}{P(h_0 | d)}=\\dfrac{0.75}{0.25}=3$$\n\nOr, to write the same thing in terms of the equations above:\n\n$$\\ \\dfrac{P(h_1 | d)}{P(h_0 | d)} = \\dfrac{P(d | h_1)}{P(d | h_0)} \\times \\dfrac{P(h_1)}{P(h_0)}$$\n\nActually, this equation is worth expanding on. There are three different terms here that you should know. On the left hand side, we have the posterior odds, which tells you what you believe about the relative plausibilty of the null hypothesis and the alternative hypothesis after seeing the data. On the right hand side, we have the prior odds, which indicates what you thought before seeing the data. In the middle, we have the Bayes factor, which describes the amount of evidence provided by the data:",
null,
"The Bayes factor (sometimes abbreviated as BF) has a special place in the Bayesian hypothesis testing, because it serves a similar role to the p-value in orthodox hypothesis testing: it quantifies the strength of evidence provided by the data, and as such it is the Bayes factor that people tend to report when running a Bayesian hypothesis test. The reason for reporting Bayes factors rather than posterior odds is that different researchers will have different priors. Some people might have a strong bias to believe the null hypothesis is true, others might have a strong bias to believe it is false. Because of this, the polite thing for an applied researcher to do is report the Bayes factor. That way, anyone reading the paper can multiply the Bayes factor by their own personal prior odds, and they can work out for themselves what the posterior odds would be. In any case, by convention we like to pretend that we give equal consideration to both the null hypothesis and the alternative, in which case the prior odds equals 1, and the posterior odds becomes the same as the Bayes factor.\n\n## Interpreting Bayes factors\n\nOne of the really nice things about the Bayes factor is the numbers are inherently meaningful. If you run an experiment and you compute a Bayes factor of 4, it means that the evidence provided by your data corresponds to betting odds of 4:1 in favour of the alternative. However, there have been some attempts to quantify the standards of evidence that would be considered meaningful in a scientific context. The two most widely used are from Jeffreys (1961) and Kass and Raftery (1995). Of the two, I tend to prefer the Kass and Raftery (1995) table because it’s a bit more conservative. So here it is:\n\nBayes factor Interpretation\n1 - 3 Negligible evidence\n3 - 20 Positive evidence\n20 - 150 Strong evidence\n$>$150 Very strong evidence\n\nAnd to be perfectly honest, I think that even the Kass and Raftery standards are being a bit charitable. If it were up to me, I’d have called the “positive evidence” category “weak evidence”. To me, anything in the range 3:1 to 20:1 is “weak” or “modest” evidence at best. But there are no hard and fast rules here: what counts as strong or weak evidence depends entirely on how conservative you are, and upon the standards that your community insists upon before it is willing to label a finding as “true”.\n\nIn any case, note that all the numbers listed above make sense if the Bayes factor is greater than 1 (i.e., the evidence favours the alternative hypothesis). However, one big practical advantage of the Bayesian approach relative to the orthodox approach is that it also allows you to quantify evidence for the null. When that happens, the Bayes factor will be less than 1. You can choose to report a Bayes factor less than 1, but to be honest I find it confusing. For example, suppose that the likelihood of the data under the null hypothesis P(d|h0) is equal to 0.2, and the corresponding likelihood P(d|h0) under the alternative hypothesis is 0.1. Using the equations given above, Bayes factor here would be:\n\n$$\\ BF=\\dfrac{P(d | h_1)}{P(d | h_0}=\\dfrac{0.1}{0.2}=0.5$$\n\nRead literally, this result tells is that the evidence in favour of the alternative is 0.5 to 1. I find this hard to understand. To me, it makes a lot more sense to turn the equation “upside down”, and report the amount op evidence in favour of the null. In other words, what we calculate is this:\n\n$$\\ BF^{\\prime} = \\dfrac{P(d | h_0)}{P(d | h_1)}=\\dfrac{0.2}{0.1}=2$$\n\nAnd what we would report is a Bayes factor of 2:1 in favour of the null. Much easier to understand, and you can interpret this using the table above.\n\nThis page titled 17.2: Bayesian Hypothesis Tests is shared under a CC BY-SA 4.0 license and was authored, remixed, and/or curated by Danielle Navarro via source content that was edited to the style and standards of the LibreTexts platform; a detailed edit history is available upon request."
] | [
null,
"https://stats.libretexts.org/@api/deki/files/4722/Screen_Shot_2020-01-06_at_12.05.59_PM.png",
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.9258923,"math_prob":0.98967767,"size":6419,"snap":"2023-40-2023-50","text_gpt3_token_len":1558,"char_repetition_ratio":0.15198752,"word_repetition_ratio":0.028492646,"special_character_ratio":0.24256115,"punctuation_ratio":0.09819324,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.99149036,"pos_list":[0,1,2],"im_url_duplicate_count":[null,5,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2023-12-05T14:35:33Z\",\"WARC-Record-ID\":\"<urn:uuid:e045b8cf-840f-445b-aa5c-8c9683051d81>\",\"Content-Length\":\"131352\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:e7d3dad0-aeb8-479e-bf50-4f15391aeff6>\",\"WARC-Concurrent-To\":\"<urn:uuid:3814af12-d101-43e5-a048-729e89143cd5>\",\"WARC-IP-Address\":\"3.162.103.5\",\"WARC-Target-URI\":\"https://stats.libretexts.org/Bookshelves/Applied_Statistics/Learning_Statistics_with_R_-_A_tutorial_for_Psychology_Students_and_other_Beginners_(Navarro)/17%3A_Bayesian_Statistics/17.02%3A_Bayesian_Hypothesis_Tests\",\"WARC-Payload-Digest\":\"sha1:R67JSX7JAYUILZWDDRYR64Q6MNJZOEAD\",\"WARC-Block-Digest\":\"sha1:CLYG5UDVJH5HAJHMYZOXWSCHPPSYPQBY\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2023/CC-MAIN-2023-50/CC-MAIN-2023-50_segments_1700679100551.2_warc_CC-MAIN-20231205140836-20231205170836-00433.warc.gz\"}"} |
https://gradeup.co/number-system-03-02-2021-i-0bf5f380-654c-11eb-b580-f982a6a7547b | [
"Time Left - 10:00 mins\n\n# Number System || 03.02.2021\n\nAttempt now to get your rank among 4359 students!\n\nQuestion 1\n\nFind the unit digit of the product of all the odd numbers till 1999.\n\nQuestion 2\n\nThe middle term(s) of the following series 2 + 4 + 6 + ... + 198 is\n\nQuestion 3\n\nWhat percentage of the numbers from 101 to 1000 have 9 as the unit digit?\n\nQuestion 4\n\nIf the difference between two numbers is 6 and the difference between their squares is 60, what is the sum of their cubes?\n\nQuestion 5\n\nWhat is the third proportional to 16 and 24?\n\nQuestion 6\n\nThe numerator of a fraction is 3 more than the denominator. When 5 is added to the numerator and 2 is subtracted from the denominator, the fraction becomes",
null,
". When the original fraction is divided by",
null,
", the fraction so obtained is:\n\nQuestion 7\n\nIf",
null,
"= 0.2346, find the value of",
null,
".\n\nQuestion 8\n\nEvaluate the following: 5 – [96 ÷ 4 of 3 – (16 – 55 ÷ 5)]\n\nQuestion 9\n\nFind the unit digit of, (1!)99 + (2!)98 + (3!)97 + ………………+ (99!)1\n\nQuestion 10\n\nFind one-fifth of three-eighth of one-third of 11760.\n• 4359 attempts",
null,
"Assistant Section Officer in CSS (AIR 203) - SSC CGL 2018 #Alumnus of IIT Dhanbad",
null,
"GradeStack Learning Pvt. Ltd.Windsor IT Park, Tower - A, 2nd Floor, Sector 125, Noida, Uttar Pradesh 201303 [email protected]"
] | [
null,
"https://gradeup-question-images.grdp.co/liveData/PROJ67388/1610457601350843.png",
null,
"https://gradeup-question-images.grdp.co/liveData/PROJ67388/1610457602110828.png",
null,
"https://gradeup-question-images.grdp.co/liveData/PROJ67070/160820809036567.png",
null,
"https://gradeup-question-images.grdp.co/liveData/PROJ67070/1608208091131254.png",
null,
"https://gs-post-images.grdp.co/2018/12/screenshot-2018-12-21-at-3-img1545387500435-75.png-rs-high-webp.png",
null,
"https://gs-post-images.grdp.co/2018/12/screenshot-2018-12-21-at-3-img1545387500435-75.png-rs-high-webp.png",
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.8981753,"math_prob":0.9464898,"size":1277,"snap":"2021-21-2021-25","text_gpt3_token_len":382,"char_repetition_ratio":0.13825609,"word_repetition_ratio":0.0,"special_character_ratio":0.33202818,"punctuation_ratio":0.1003861,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9948113,"pos_list":[0,1,2,3,4,5,6,7,8,9,10,11,12],"im_url_duplicate_count":[null,9,null,9,null,9,null,9,null,null,null,null,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2021-05-06T01:10:21Z\",\"WARC-Record-ID\":\"<urn:uuid:678f07d9-6ecb-4cbe-a628-458cef24d61c>\",\"Content-Length\":\"238062\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:9d46a912-5c37-4a3b-be9d-17dae5d28f71>\",\"WARC-Concurrent-To\":\"<urn:uuid:a46f863c-37a6-403c-9ed9-e751e5b2a7e5>\",\"WARC-IP-Address\":\"104.17.12.38\",\"WARC-Target-URI\":\"https://gradeup.co/number-system-03-02-2021-i-0bf5f380-654c-11eb-b580-f982a6a7547b\",\"WARC-Payload-Digest\":\"sha1:FXE6NUXSEX5PPI5JEZZIUFYR562B3TLL\",\"WARC-Block-Digest\":\"sha1:WZLVL3IYXVISEDUBJTBMRTPGGAZVBIXT\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2021/CC-MAIN-2021-21/CC-MAIN-2021-21_segments_1620243988724.75_warc_CC-MAIN-20210505234449-20210506024449-00014.warc.gz\"}"} |
https://jwcn-eurasipjournals.springeropen.com/articles/10.1186/1687-1499-2011-202 | [
"# Radio wave propagation in curved rectangular tunnels at 5.8 GHz for metro applications, simulations and measurements\n\n## Abstract\n\nNowadays, the need for wireless communication systems is increasing in transport domain. These systems have to be operational in every type of environment and particularly tunnels for metro applications. These ones can have rectangular, circular or arch-shaped cross section. Furthermore, they can be straight or curved. This article presents a new method to model the radio wave propagation in straight tunnels with an arch-shaped cross section and in curved tunnels with a rectangular cross section. The method is based on a Ray Launching technique combining the computation of intersection with curved surfaces, an original optimization of paths, a reception sphere, an IMR technique and a last criterion of paths validity. Results obtained with our method are confronted to results of literature in a straight arch-shaped tunnel. Then, comparisons with measurements at 5.8 GHz are performed in a curved rectangular tunnel. Finally, a statistical analysis of fast fading is performed on these results.\n\n## 1. Introduction\n\nWireless communication systems are key solutions for metro applications to carry, at the same time, with different priorities, data related to control-command and train operation and exploitation. Driverless underground systems are one of the best examples of the use of such wireless radio system deployments based on WLAN, standards generally in the 2.45 or 5.8 GHz bands (New York, line 1 in Paris, Malaga, Marmaray, Singapore, Shangaï, etc.). These systems require robustness, reliability and high throughputs in order to answer at the same time the safety and the QoS requirements for data transmission. They must verify key performance indicators such as minimal electric field levels in the tunnels, targeted bit error rates (BER), targeted handover times, etc. Consequently, metro operators and industries need efficient radio engineering tools to model the electromagnetic propagation in tunnels for radio planning and network tuning. In this article, we propose an original method based on a Ray Launching method to model the electromagnetic propagation at 5.8 GHz in tunnels with curved cross section or curved main direction. The article is organized as follows. Section 2 details existing studies on this topic. Section 3 presents the developed method. A comparison of our results with the ones obtained in the literature is performed in Section 4 for a straight arch-shaped tunnel. Our method is then confronted to measurements at 5.8 GHz and validated in a curved rectangular tunnel in Section 5. A statistical analysis of simulated results in a curved rectangular tunnel is then performed in Section 6. Finally, Section 7 concludes the article and gives some perspectives.\n\n## 2. Existing studies on radio wave propagation in curved tunnels\n\nDifferent approaches to model the radio wave propagation in tunnels were presented in the literature. Analyses based on measurements represent the first approach but such studies are long and expensive [1, 2]. Thus, techniques based on the modal theory have been explored . The modal theory provides good results but is limited to canonical geometries since it considers tunnels as oversized waveguides. Some authors have also proposed an exact resolution of Maxwell's equations based on numerical techniques . This kind of techniques is limited, specifically by the computational burden due to the fine discretization requirement of the environment, in terms of surface or volume. Finally, frequency asymptotic techniques based on the ray concept, being able to treat complex geometries in a reasonable computation time, seem to be a good solution. In , a model based on a Ray Tracing provides the attenuation in a straight rectangular tunnel. In , the author uses this method and adds diffraction phenomenon in order to analyze coupling between indoor and outdoor. In , studies are purchased by considering changes of tunnel sections. The main drawback of the Ray Tracing method is the impossibility to handle curved surfaces.\n\nTo treat curved surfaces, the first intuitive approach consists in a tessellation of the curved geometry into multiple planar facets, as proposed in . However, the surfaces' curvature is not taken into account in this kind of techniques and the impossibility to define rules for the choice of an optimal number of facets versus the tunnel geometry and the operational frequency was highlighted. In , a ray-tube tracing method is used to simulate wave propagating in curved road tunnels based on an analytical representation of curved surfaces. Comparisons with measurements are performed in arch-shaped straight tunnels and curved tunnels. In , a Ray Launching is presented. The surfaces' curvature is taken into account using ray-density normalization. Comparisons with measurements are performed in curved subway tunnels.\n\nThis method requires a large number of rays launched at transmission in order to ensure the convergence of the results, this implies long computation durations but it provides interesting results and a good agreement with measurements. Starting from some ideas of this technique, we propose a novel method able to model the electromagnetic propagation in tunnels with curved geometry, either for the cross section or the main direction. This study was performed in the context of industrial application and the initial objective was clearly to develop a method where a limited number of rays are launched in order to minimize drastically the computation time. Consequently, instead of using the normalization technique of , we have developed an optimization process after the Ray Launching stage. The number of rays to be launched decrease from 20 million to 1 million. The final goal is to exploit the method intensively to perform radio planning in complex environments, such as tunnels at 5.8 GHz for metro applications.\n\n## 3. Developed method\n\nThe method considered in this study is based on a Ray Launching method. The main principle is to send a lot of rays in the environment from the transmitter, to let them interact with the environment assuming an allowed number of electromagnetic interactions and to compute the received power from the paths which pass near the receiver. The implementation of this principle has led us to make choices that are detailed below.\n\n### 3.1. Ray Launching principle\n\nWith the Ray Launching-based methods, there is a null probability to reach a punctual receiver by sending rays in random directions. To determine if a path is received or not, we used a classical reception sphere centered on the receiver, whose radius r R depends on the path length, r, and the angle between two transmitted rays, γ :\n\n${r}_{R}=\\frac{\\gamma r}{\\sqrt{3}}$\n(1)\n\nA contributive ray is one that has reached the reception sphere (Figure 1). This specific electromagnetic path between the transmitter and the receiver presents some geometrical approximations since it does not exactly go through the exact receiver position.\n\n### 3.2. Intersection between the transmitted rays and the environment\n\nTwo kinds of tunnel geometry have to be taken into account: The planes for the ceil and/or the roof, and the cylinder for the walls. These components are quadrics, which is important for the simplicity of intersection computation with rays. The intersection of ray with a cylinder (respectively a plane) leads to the resolution of an equation of degree 2 (respectively of degree 1).\n\n### 3.3. Optimization\n\nThe reception sphere leads to take into account multiple rays. The classical identification of multiple rays (IMR) algorithm consists in keeping one of the multiple rays. At this stage, the chosen one is still an approximation of the deterministic ray which exists between the transmitter and the receiver. So, to correct this problem, we propose to replace the classical IMR by an original optimization algorithm allowing modifying paths trajectories in order to make them converge to the real ones. We then disambiguate the choice of the ray to keep for a correct field calculation.\n\nUsing the Fermat Principle, indicating that the way followed by the wave between two points is always the shortest, we propose to reduce the geometrical approximation involved in each path. The optimization algorithm consists, for a given path, in minimizing its length, assuming that it exactly reaches the receiver (i.e., the center of the reception sphere).\n\nWhile the path length function is not a linear one, we propose to use the Levenberg-Marquardt algorithm . Its principle consists in finding the best parameters of a function which minimize the mean square error between the curve we try to approximate and its estimation.\n\nApplied to propagation in tunnels, the aim becomes to minimize the path length. The J criterion to minimize is then the total path length equals to\n\n$J=\\parallel \\stackrel{\\to }{E{P}_{1}}\\parallel +\\sum _{k=2}^{N}\\parallel \\stackrel{\\to }{{P}_{k-1}{P}_{k}}\\parallel +\\parallel \\stackrel{\\to }{{P}_{N}R}\\parallel$\n(2)\n\nwith E the transmitter, R the receiver and P k the k th interaction point of the considered path, as illustrated in Figure 2.\n\nThe parameters vector contains the coordinates of the interaction points of the path. The iterative algorithm needs the Hessian matrix inversion, which contains the partial derivatives of the J criterion to minimize with respect to parameters. Then, in order to reduce computation time and numerical errors, we have to minimize the matrix dimensions and so the number of parameters. Thus, we decide to use local parametric coordinates (u, v) from the given curved surface instead of global Cartesian coordinates (x, y, z). The parameters vector θ can be written\n\n$\\theta =\\left[{u}_{1}{v}_{1}\\dots {u}_{N}{v}_{N}\\right]$\n(3)\n\nwhere (u k , v k ) correspond to coordinates of the reflection point P k .\n\nA validation test is added after the optimization step in order to check if the Geometrical Optics laws are respected, specifically the Snell-Descartes ones. Concretely, we check, for each reflection point, if the angle of reflection θr equals the angle of incidence θ i , as shown in Figure 3. Last step consists in the IMR technique in order to eliminate multiple rays. The optimization technique allows obtaining multiple rays very close to the real path, and consequently very close to each others. Nevertheless, due to numerical errors, they cannot be strictly equal each others. Thus, the IMR technique can be reduced to a localization of reflection points: If a reflection point of two paths is at a given maximal inter-distance equals to 1 cm, they are considered to be identical and one of the two is removed.\n\n### 3.4. Electric field calculation\n\nFigure 4 illustrates the reflection of an electromagnetic wave on a curved surface. In this case, electric field can be computed after reflection by classical methods of Geometrical Optics as long as the curvature radiuses of surfaces are large compared to the wavelength .\n\nIt can be expressed as follows (Figure 4):\n\n$\\stackrel{\\to }{{E}^{r}}\\left(P\\right)=\\sqrt{\\frac{{\\rho }_{1}^{r}{\\rho }_{2}^{r}}{\\left({\\rho }_{1}^{r}+r\\right)\\left({\\rho }_{2}^{r}+r\\right)}}{e}^{-jkr}\\overline{\\overline{R}}\\stackrel{\\to }{{E}^{i}}\\left(Q\\right)$\n(4)\n\nwith ρ1rand ρ2rthe curvature radiuses of the reflected ray, r the distance between the considered point P and the reflection point Q and $\\overline{\\overline{R}}$ the matrix of reflection coefficients.\n\nContrary to the case of planar surfaces, the curvature radiuses of the reflected ray are different from the ones of the incident ray. Indeed, the following relation holds :\n\n$\\frac{1}{{\\rho }_{1,2}^{r}}=\\frac{1}{2}\\left(\\frac{1}{{\\rho }_{1}^{i}}+\\frac{1}{{\\rho }_{2}^{i}}\\right)+\\frac{1}{{f}_{1,2}}$\n(5)\n\nwith ρ1iand ρ2ithe curvature radiuses of the incident ray and f1,2 a function depending on ρ1i, ρ2iand the curvature radiuses R1,2 of the curved surface.\n\n## 4. Comparisons with existing results\n\nIn this section, we compare the results obtained with our method with existing results in a straight arch-shaped tunnel (tunnel C) extracted from . The configuration of simulation is presented in Figure 5a. It has to be noted that the developed method cannot afford the vertical walls, we then simulated the close configuration presented in Figure 5b.\n\nResults are given in Figure 6. We must remember that the approach used in is different from ours, because it considers a ray-tube tracing method, reflection on curved surfaces is also considered. Figure 6 highlights some similar results for the tunnel C. Deep fadings are located in the same areas and Electric Field levels are globally similar along the tunnel axis. Differences that appear on field level are due to the difference in terms of representation of the configuration. Despite the geometric difference, the two methods lead to some similar results in terms of Electric Field levels which are the information considered for radio planning in tunnels.\n\n## 5. Comparisons with measurements\n\n### 5.1. Trial conditions\n\nThis section evaluates performances of the method proposed in the case of a real curved rectangular tunnel. Measurements presented in this section were performed by an ALSTOM-TIS team. The measurement procedure is as follows. The transmitter is located on a side near the tunnel wall. It is connected to a radio modem delivering a signal at 5.8 GHz. Two receivers, separated by almost 3 m, are placed on the train roof. They are connected to a radio modem placed inside the train. Tools developed by ALSTOM-TIS allow to realize field measurements and to take into account a simple spatial diversity by keeping the maximum level of the two receivers. The measurements' configuration is depicted in Figure 7. The curved rectangular tunnel has a curvature radius equals to 299 m, a width of 8 m and a height of 5 m.\n\n### 5.2. Simulation results\n\nThe geometric configuration has been reproduced for simulations, performed for the two receivers. Comparisons of measurements (black line) and simulations (grey line) are presented in Figure 8. The results are normalized by the maximum of the received power along the tunnel.\n\nA quite good concordance between the simulations and the measurements is observed. A mean and a standard deviation of the error between measurements and simulations of 2.15 and 2.55 dB are, respectively, obtained. An error of about 2-3 dB highlights a quite good agreement between measurements and simulations considering usual rules in radio engineering.\n\n### 5.3. 2-Slope model\n\nAs presented in in the case of a straight rectangular tunnel, we observe in Figure 8 that longitudinal attenuation in the curved rectangular tunnel follows a 2-slope model until a distance of 350 m. The first break point is located around 20 m. First slope before the break point is about 96 dB/100 m. Second slope after the breakpoint is about 10 dB/100 m.\n\nThis study highlights that the breakpoint is smaller in the case of a curved tunnel than for a straight tunnel (about 50 m). The longitudinal attenuation corresponding to the first slope is also very important. Furthermore, a very similar behavior is observed for both measurements and simulations. This type of very simple model based on path loss is really interesting from an operational point of view in order to perform easily radio planning in the tunnel. This approach provides a first validation of our method. The next step will be to perform further analysis in terms of slow and fast fadings in order to margin gains for radio deployment for a system point of view to reach targeted BER and to tune the network and the handover process.\n\n## 6. Statistical analysis of simulations in a curved rectangular tunnel\n\nThis section is dedicated to the statistical analysis of fast fading of the simulated results obtained by the method described in Section 3. The configuration of the simulation is presented in Figure 7. First step consists in extracting fast fading by using a running mean. The window's length is 40 λ on the first 50 m, and 100 λ elsewhere, according to the literature . Second step consists of a calculation of the cumulative density function (CDF) of the simulated results. Last step consists of applying the Kolmogorov-Smirnov (KS) criterion between CDF of simulated results and CDF of theoretical distributions of Rayleigh, Rice, Nakagami and Weibull. The KS criterion allows us to quantify the similarity between the simulation results and a given theoretical distribution. The four distributions have been chosen because they represent classical distribution to characterize fast fading.\n\nA first global analysis is performed on 350 m and a second on the two zones presented in Section 5.3: Zone 1 (0-25 m) and Zone 2 (25-350 m). Figures 9, 10, and 11 present the CDF of the simulated results compared to those of the four previous theoretical distributions, respectively, for the global analysis, the Zones 1 and 2. It can be observed that results obtained with Rayleigh and Rice distribution are equal. Furthermore, the Weibull distribution seems to be the distribution that fits the best the simulated results, whatever the zone is. In order to prove it, Table 1 presents the values of the KS criteria between simulated results and the four theoretical distributions and the values of the estimated parameters of the distributions, for the three zones. The first observation is that the estimated distributions have a quite similar behavior whatever the zone is. Furthermore, it appears that the Weibull distribution better minimizes the KS criterion. The Weibull distribution is the distribution that best fits the simulated results for the global signals and also for the two zones.\n\nIt has to be noted that these results are similar to those obtained in the case of rectangular tunnels. Similar studies have been conducted in the case of rectangular straight tunnels and have shown that Weibull distribution is the distribution that best fits the simulated results.\n\n## Conclusion\n\nThis article presented a novel original method to model the radio wave propagation in curved tunnels. It is based on a Ray Launching technique. A reception sphere is used and an original optimization of paths is added. It consists in a minimization of the path length, according to the Fermat Principle. Finally, an adaptive IMR has been developed based on the localization of reflection points.\n\nResults obtained in a straight arch-shaped tunnel are first compared to that of presented in the literature. We then treated the specific case of a curved rectangular tunnel by comparisons with measurement results performed in a metro tunnel. The results highlighted good agreement between measurements and simulations with an error lower than 3 dB. Using a classical path loss model in the tunnel, we have shown a good agreement between measurements and simulations at 5.8 GHz showing that the method can be used to predict radio wave propagation in straight and curved rectangular tunnels for metro applications. Finally, a statistical analysis of fast fading was performed on the simulated results. It highlighted a fitting with the Weibull distribution.\n\nThe main perspective would be to be able to consider complex environments such as the presence of metros in the tunnel. In this case, we have to implement diffraction on edges by using Ray Launching and also diffraction on curved surfaces.\n\n## References\n\n1. Zhang YP, Hong HJ: Ray-optical modeling of simulcast radio propagation channels in tunnels. IEEE Trans Veh Technol 2004, 53(6):1800-1808. 10.1109/TVT.2004.836920\n\n2. Lienard M, Degauque P: Propagation in wide tunnels at 2 GHz: a statistical analysis. IEEE Trans Veh Technol 1998, 47(4):1322-1328. 10.1109/25.728522\n\n3. Laakmann KD, Steier WH: Waveguides: characteristic modes of hollow rectangular dielectric waveguides. Appl Opt 1976, 15(5):1334-1340. 10.1364/AO.15.001334\n\n4. Emslie A, Lagace R, Strong P: Theory of the propagation of UHF radio waves in coal mine tunnels. IEEE Trans Antenn Propag 1975, 23(2):192-205. 10.1109/TAP.1975.1141041\n\n5. Dudley DG, Mahmoud SF: Linear source in a circular tunnel. IEEE Trans Antenn Propag 2006, 54(7):2034-2047. 10.1109/TAP.2006.877195\n\n6. Bernardi P, Caratelli D, Cicchetti R, Schena V, Testa O: A numerical scheme for the solution of the vector parabolic equation governing the radio wave propagation in straight and curved rectangular tunnels. IEEE Trans Antenn Propag 2009, 57(10):3249-3257.\n\n7. Mahmoud S: Characteristics of electromagnetic guided waves for communication in coal mine tunnels. IEEE Trans Commun Syst 1974, 22(10):1547-1554. 10.1109/TCOM.1974.1092093\n\n8. Mariage P, Lienard M, Degauque P: Theoretical and experimental approach of the propagation of high frequency waves in road tunnels. IEEE Trans Antenn Propag 1994, 42(1):75-81. 10.1109/8.272304\n\n9. Agunaou M, Belattar S, Mariage P, Degauque P: Propagation d'ondes électromagnétiques hyperfréquences à l'intérieur d'un métro-Modélisation numérique de l'influence des changements de section. Recherche Transports Sécurité 1998, 64: 55-68.\n\n10. Masson E, Combeau P, Cocheril Y, Berbineau M, Aveneau L, Vauzelle R: Radio wave propagation in arch-shaped tunnels: measurements and simulations using asymptotic methods. CR Phys 2010, 11: 44-53.\n\n11. Wang TS, Yang CF: Simulations and measurements of wave propagations in curved road tunnels for signals from GSM base stations. IEEE Trans Antenn Propag 2006, 54(9):2577-2584. 10.1109/TAP.2006.880674\n\n12. Didascalou D, Schafer TM, Weinmann F, Wiesbeck W: Ray-density normalization for ray-optical wave propagation modeling in arbitrarily shaped tunnels. IEEE Trans Antenn Propag 2000, 48(9):1316-1325. 10.1109/8.898764\n\n13. Seidl SY, Rappaport TS: Site-specific propagation prediction for wireless in-building personal communication system design. IEEE Trans Veh Technol 1994, 43(3):879-891.\n\n14. Marquardt DW: An algorithm for least-squares estimation of nonlinear parameters. J Soc Indust Appl Math 1963, 11(2):431-441. 10.1137/0111030\n\n15. Balanis CA: Advanced Engineering Electromagnetics. John Wiley and Sons; 1989.\n\n16. Document Cost231 TD(95) 031–Thomas Klemenschits, Ernts Bonek-Radio Coverage of Tunnels by Discrete Antennas: Measurement and prediction (1995).\n\n## Acknowledgements\n\nThe authors would like to thank the ALSTOM-TIS (Transport Information Solution) who supported this study. Furthermore, this study was performed in the framework of the I-Trans cluster and in the regional CISIT (Campus International Sécurité et Intermodalité des Transports) program.\n\n## Author information\n\nAuthors\n\n### Corresponding author\n\nCorrespondence to Emilie Masson.\n\n### Competing interests\n\nThe authors declare that they have no competing interests.\n\n## Authors’ original submitted files for images\n\nBelow are the links to the authors’ original submitted files for images.\n\n## Rights and permissions\n\nReprints and Permissions\n\nMasson, E., Cocheril, Y., Combeau, P. et al. Radio wave propagation in curved rectangular tunnels at 5.8 GHz for metro applications, simulations and measurements. J Wireless Com Network 2011, 202 (2011). https://doi.org/10.1186/1687-1499-2011-202\n\n• Accepted:\n\n• Published:\n\n• DOI: https://doi.org/10.1186/1687-1499-2011-202\n\n### Keywords\n\n• metro applications\n• wave propagation\n• ray launching\n• curved tunnels\n• arch-shaped tunnels",
null,
""
] | [
null,
"https://jwcn-eurasipjournals.springeropen.com/track/article/10.1186/1687-1499-2011-202",
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.906804,"math_prob":0.9016935,"size":23074,"snap":"2022-05-2022-21","text_gpt3_token_len":4889,"char_repetition_ratio":0.14161249,"word_repetition_ratio":0.034763105,"special_character_ratio":0.21136343,"punctuation_ratio":0.11565921,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.97475857,"pos_list":[0,1,2],"im_url_duplicate_count":[null,3,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2022-05-23T23:23:25Z\",\"WARC-Record-ID\":\"<urn:uuid:29ec60a4-3d23-4469-9a2d-67f27294e97d>\",\"Content-Length\":\"267054\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:654db0be-5802-464d-811c-00ecb20a414d>\",\"WARC-Concurrent-To\":\"<urn:uuid:7e4eedb9-a765-4029-bb87-37844058d65f>\",\"WARC-IP-Address\":\"146.75.36.95\",\"WARC-Target-URI\":\"https://jwcn-eurasipjournals.springeropen.com/articles/10.1186/1687-1499-2011-202\",\"WARC-Payload-Digest\":\"sha1:QRAJF5EWLFPFQCWQDDLMUDLEQ6FXLPSC\",\"WARC-Block-Digest\":\"sha1:BCESKTDKR7KEIM7V55ZNQFC2QPT354A5\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2022/CC-MAIN-2022-21/CC-MAIN-2022-21_segments_1652662562106.58_warc_CC-MAIN-20220523224456-20220524014456-00286.warc.gz\"}"} |
https://math.gatech.edu/seminars-colloquia/series/geometry-topology-seminar/patricia-cahn-20200302 | [
"## Joint UGA-GT Topology Seminar at UGA: The dihedral genus of a knot\n\nSeries\nGeometry Topology Seminar\nTime\nMonday, March 2, 2020 - 4:00pm for 1 hour (actually 50 minutes)\nLocation\nBoyd\nSpeaker\nPatricia Cahn – Smith College\nOrganizer\n\nWe consider dihedral branched covers of $S^4$, branched along an embedded surface with one non-locally flat point, modelled on the cone on a knot $K\\subset S^3$. Kjuchukova proved that the signature of this cover is an invariant $\\Xi_p(K)$ of the $p$-colorable knot $K$. We prove that the values of $\\Xi_p(K)$ fall in a bounded range for homotopy-ribbon knots. We also construct a family of (non-slice) knots for which the values of $\\Xi_p$ are unbounded. More generally, we introduce the notion of the dihedral 4-genus of a knot, and derive a lower bound on the dihedral 4-genus of $K$ in terms of $\\Xi_p(K)$. This work is joint with A. Kjuchukova."
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.8761354,"math_prob":0.9895883,"size":850,"snap":"2021-21-2021-25","text_gpt3_token_len":254,"char_repetition_ratio":0.10638298,"word_repetition_ratio":0.0,"special_character_ratio":0.27294117,"punctuation_ratio":0.086419754,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9876534,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2021-05-06T21:05:25Z\",\"WARC-Record-ID\":\"<urn:uuid:70d22a42-18c3-41e6-83d4-d46776e6b41f>\",\"Content-Length\":\"28427\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:9a0b0d1d-1c8a-441f-97dc-8163517ffabe>\",\"WARC-Concurrent-To\":\"<urn:uuid:b7c5b49e-4b43-4219-9ecb-567343604bd7>\",\"WARC-IP-Address\":\"130.207.188.152\",\"WARC-Target-URI\":\"https://math.gatech.edu/seminars-colloquia/series/geometry-topology-seminar/patricia-cahn-20200302\",\"WARC-Payload-Digest\":\"sha1:YKIVI25IDXVG56RCEIXPIRYXX5DPKP2A\",\"WARC-Block-Digest\":\"sha1:PWX2QTEDRLQPPJZGRH62KAIFUC2RLMYZ\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2021/CC-MAIN-2021-21/CC-MAIN-2021-21_segments_1620243988763.83_warc_CC-MAIN-20210506205251-20210506235251-00189.warc.gz\"}"} |
https://www.worksheetlibrary.com/subjects/math/money/moneymath/ | [
"# Calculating Interest Worksheets\n\n#### How to Calculate Simple Interest\n\nThe expression \"basic\" signifies you are working with the easiest method of computing interest. When you see how to compute a straightforward premium, you can proceed onward to different computations, such as yearly rate yield (APY), yearly rate (APR), and progressive accrual. Let us assume you contribute \\$100 (the head) at a 5% yearly rate for one year. The straightforward interest figuring is: \\$100 x 0.05 x 1 = \\$5 straightforward interest for one year Note that the loan cost (5%) shows up as a decimal (.05). To do your own calculations, you may need to change rates over to decimals. A simple stunt for recalling this is to consider the word percent \"per 100.\" You can change over a rate into its decimal structure by partitioning it by 100. Or on the other hand, simply move the decimal direct two spaces toward the left. For instance, to change over 5% into a decimal, partition 5 by 100 and get .05.",
null,
"###### (Months) - Basic Skills\n\nWe provide you with four variables (principal, interest rate, time in months, and simple interest accrued), one is missing. What is that value?",
null,
"###### (Months) - Intermediate Skills\n\nWe work with large values in this series.",
null,
"###### Full Year\n\nWe pivot from using the time frame of a few months to a single year.",
null,
"###### Basic Skills: Interest Word Problems\n\nExample problem: You put \\$1,000 into an investment yielding 6% annual simple interest. You leave the money for two years. How much interest do you get at the end of those two years?",
null,
"###### Intermediate Skills: Interest Word Problems\n\nExample problem: An employee borrowed \\$5,000 from a money lender at rate of 12 % per year and repaid \\$5,450 after some time. How long did she borrow the money for (in months)?"
] | [
null,
"https://www.worksheetlibrary.com/subjects/math/money/moneymath/1.jpg",
null,
"https://www.worksheetlibrary.com/subjects/math/money/moneymath/4.jpg",
null,
"https://www.worksheetlibrary.com/subjects/math/money/moneymath/8.jpg",
null,
"https://www.worksheetlibrary.com/subjects/math/money/moneymath/15.jpg",
null,
"https://www.worksheetlibrary.com/subjects/math/money/moneymath/18.jpg",
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.9207675,"math_prob":0.9508676,"size":1702,"snap":"2021-04-2021-17","text_gpt3_token_len":390,"char_repetition_ratio":0.112485275,"word_repetition_ratio":0.013605442,"special_character_ratio":0.24500588,"punctuation_ratio":0.120943956,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9934186,"pos_list":[0,1,2,3,4,5,6,7,8,9,10],"im_url_duplicate_count":[null,1,null,1,null,1,null,1,null,1,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2021-04-19T17:50:36Z\",\"WARC-Record-ID\":\"<urn:uuid:da4e5ce6-5156-48e7-8a5b-daa2c405511b>\",\"Content-Length\":\"20051\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:d556ab91-e7b6-4a59-a5c9-f8deb94d7c89>\",\"WARC-Concurrent-To\":\"<urn:uuid:902f13df-01bf-4826-b19c-aa76002eb859>\",\"WARC-IP-Address\":\"172.67.179.35\",\"WARC-Target-URI\":\"https://www.worksheetlibrary.com/subjects/math/money/moneymath/\",\"WARC-Payload-Digest\":\"sha1:BJ4LS54XC5T6FWBFCMPZ24T6WG5AWD4J\",\"WARC-Block-Digest\":\"sha1:SQQWTLMB7DQZJVUQMBAHHM7ZVAIU7XVM\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2021/CC-MAIN-2021-17/CC-MAIN-2021-17_segments_1618038916163.70_warc_CC-MAIN-20210419173508-20210419203508-00413.warc.gz\"}"} |
https://research.snu.edu.in/publication/improved-selection-in-totally-monotone-arrays | [
"",
null,
"X\nImproved selection in totally monotone arrays\nY. Mansour, J.K. Park, B. Schieber,\nPublished in Springer Verlag\n1991\nVolume: 560 LNCS\n\nPages: 347 - 359\nAbstract\nThis paper’s main result is an O((√m lg m)(n lg n)+m lg n)-time algorithm for computing the kth smallest entry in each row of an m × n totally monotone array. (A two-dimensional array A = {a[i,j]} is totally monotone if for all i1 < i2 and j1 < j2, a[i1,j1] < a[i1, j2] implies a[i2, j1] < a[i2, j2].) For large values of k (in particular, for k = n/2'|), this algorithm is significantly faster than the O(k(m + n))-time algorithm for the same problem due to Kravets and Park (1991). An immediate consequence of this result is an O(n3/2 lg2 n)-time algorithm for computing the kth nearest neighbor of each vertex of a convex n-gon. In addition to the main result, we also give an O(n lg m)-time algorithm for computing an approximate median in each row of an m × n totally monotone array; this approximate median is an entry whose rank in its row lies between [n/4] and [3n/4]. © Springer-Verlag Berlin Heidelberg 1991.",
null,
"",
null,
"•",
null,
""
] | [
null,
"https://d5a9y5rnan99s.cloudfront.net/tds-static/images/ico-hamburger.svg",
null,
"https://d5a9y5rnan99s.cloudfront.net/tds-static/images/openaccess.svg",
null,
"https://d5a9y5rnan99s.cloudfront.net/tds-static/images/impactfactor.svg",
null,
"https://typeset-partner-institution.s3-us-west-2.amazonaws.com/snu/authors/sandeep-sen.png",
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.88629127,"math_prob":0.9892663,"size":919,"snap":"2023-40-2023-50","text_gpt3_token_len":263,"char_repetition_ratio":0.11584699,"word_repetition_ratio":0.09756097,"special_character_ratio":0.2959739,"punctuation_ratio":0.08,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9959368,"pos_list":[0,1,2,3,4,5,6,7,8],"im_url_duplicate_count":[null,null,null,null,null,null,null,null,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2023-12-09T14:50:15Z\",\"WARC-Record-ID\":\"<urn:uuid:5feab3ef-89e3-4273-b689-8c9611815be3>\",\"Content-Length\":\"98243\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:3e25eb8b-9199-40b4-8756-a607e65144ad>\",\"WARC-Concurrent-To\":\"<urn:uuid:463355d8-82f5-400a-b5a2-7a1c99240ab0>\",\"WARC-IP-Address\":\"52.35.100.185\",\"WARC-Target-URI\":\"https://research.snu.edu.in/publication/improved-selection-in-totally-monotone-arrays\",\"WARC-Payload-Digest\":\"sha1:KG2P55OGBLD4LLKPWYL3IGMCBWZFK3OQ\",\"WARC-Block-Digest\":\"sha1:NHJ4JPJX42NNBN5HE33IPWXK3PJRWPY5\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2023/CC-MAIN-2023-50/CC-MAIN-2023-50_segments_1700679100912.91_warc_CC-MAIN-20231209134916-20231209164916-00574.warc.gz\"}"} |
https://nl.mathworks.com/matlabcentral/answers/469009-error-using-svd-input-to-svd-must-not-contain-nan-or-inf?s_tid=prof_contriblnk | [
"# Error using svd Input to SVD must not contain NaN or Inf.\n\n180 views (last 30 days)\nYapo OBOUE on 26 Jun 2019\nEdited: Shashank Sharma on 27 Jun 2019\nHello everyone, I meet a problem with my code. when I run this code below, I get this error :\nError using svd Input to SVD must not contain NaN or Inf.\nError in fxy_I2_5Ddamp_nx_ny>P_RD (line ....)\n[U,S,V] = svd(din);\nHow do I solve this problem ? Thanks.\nfunction [dout]=P_RD(din,N,K)\n[U,S,V] = svd(din);\ns = SoftTh(diag(S), 2);\nj=1:N\nS=diag(s);\nfor j=1:N\nS(j,j)=S(j,j)*(1-S(N+1,N+1)^K/S(j,j)^K);\nend\ndout=U(:,1:N)*S(1:N,1:N)*(V(:,1:N)');\nreturn\n\n#### 1 Comment\n\ninfinity on 26 Jun 2019\nHello,\nAccording to the error, it could be seen that the matrix \"din\" contain \"NaN\" or \"Inf\". To solve your problem, you need to check why do you have NaN or Inf in the matrix \"din\".\n\nShashank Sharma on 27 Jun 2019\nEdited: Shashank Sharma on 27 Jun 2019\nRun any(any(isnan(din))) and any(any(isinf(din))). If the output is 1 it means your matrix din has an infinity value or a not a number value. This is causing the svd function to error out."
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.6346095,"math_prob":0.78232116,"size":784,"snap":"2020-45-2020-50","text_gpt3_token_len":270,"char_repetition_ratio":0.1,"word_repetition_ratio":0.050632913,"special_character_ratio":0.3405612,"punctuation_ratio":0.22115384,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.97412664,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2020-10-28T00:42:37Z\",\"WARC-Record-ID\":\"<urn:uuid:b2bf3cdc-de61-4d84-84d6-96e9be20ff0c>\",\"Content-Length\":\"106170\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:67eb7abf-9886-4048-9f90-253224ed142c>\",\"WARC-Concurrent-To\":\"<urn:uuid:03f4da72-a796-430d-b48a-f59696ef07c2>\",\"WARC-IP-Address\":\"23.212.144.59\",\"WARC-Target-URI\":\"https://nl.mathworks.com/matlabcentral/answers/469009-error-using-svd-input-to-svd-must-not-contain-nan-or-inf?s_tid=prof_contriblnk\",\"WARC-Payload-Digest\":\"sha1:ICCZBNVYBSIPD27Z2KGFB6ZZRP3H2CS4\",\"WARC-Block-Digest\":\"sha1:YJD4ZNMEDFJXCZ34HRGLU2HVQWAUNOEE\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2020/CC-MAIN-2020-45/CC-MAIN-2020-45_segments_1603107894890.32_warc_CC-MAIN-20201027225224-20201028015224-00276.warc.gz\"}"} |
https://answers.everydaycalculation.com/divide-fractions/7-8-divided-by-5-10 | [
"Solutions by everydaycalculation.com\n\n## Divide 7/8 with 5/10\n\n7/8 ÷ 5/10 is 7/4.\n\n#### Steps for dividing fractions\n\n1. Find the reciprocal of the divisor\nReciprocal of 5/10: 10/5\n2. Now, multiply it with the dividend\nSo, 7/8 ÷ 5/10 = 7/8 × 10/5\n3. = 7 × 10/8 × 5 = 70/40\n4. After reducing the fraction, the answer is 7/4\n5. In mixed form: 13/4\n\nMathStep (Works offline)",
null,
"Download our mobile app and learn to work with fractions in your own time:"
] | [
null,
"https://answers.everydaycalculation.com/mathstep-app-icon.png",
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.62096196,"math_prob":0.9386827,"size":358,"snap":"2021-31-2021-39","text_gpt3_token_len":187,"char_repetition_ratio":0.24011299,"word_repetition_ratio":0.0,"special_character_ratio":0.54189944,"punctuation_ratio":0.05154639,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9669371,"pos_list":[0,1,2],"im_url_duplicate_count":[null,null,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2021-09-17T22:55:37Z\",\"WARC-Record-ID\":\"<urn:uuid:08fe5140-a95f-440b-afab-2ebed8c7088e>\",\"Content-Length\":\"8380\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:8c70a7e9-2e61-4336-ae12-672fc640fe6c>\",\"WARC-Concurrent-To\":\"<urn:uuid:5f592ede-9b62-4d67-8f91-b4984310e162>\",\"WARC-IP-Address\":\"96.126.107.130\",\"WARC-Target-URI\":\"https://answers.everydaycalculation.com/divide-fractions/7-8-divided-by-5-10\",\"WARC-Payload-Digest\":\"sha1:M2443EGCOXJBWHVNITJEYY5H6VLVMBJD\",\"WARC-Block-Digest\":\"sha1:FHTRKSA3IKKPVGTBFK5FMLPT7Y7RNJRG\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2021/CC-MAIN-2021-39/CC-MAIN-2021-39_segments_1631780055808.78_warc_CC-MAIN-20210917212307-20210918002307-00107.warc.gz\"}"} |
http://staging.physicsclassroom.com/class/light/u12l3a | [
"Light Waves and Color - Lesson 3 - Mathematics of Two-Point Source Interference\n\n# Anatomy of a Two-Point Source Interference Pattern\n\nLesson 1 of this unit of The Physics Classroom Tutorial focused on the nature of light as a wave. Evidence that led scientists to believe that light had a wavelike nature was presented. One piece of evidence centered around the ability of one light wave to interfere with another light wave. This interference is most obvious if monochromatic light from two coherent sources is allowed to interfere. In Lesson 3 of this unit, we will focus upon the mathematical nature of two-point source light interference. The relationship between the wavelength of light and the specific features of a two-point source interference pattern will be described. The means by which Thomas Young used this relationship to measure the wavelength of light will be discussed.\n\nIn Lesson 1, the nature of the interference pattern produced by two bobbing sources in a ripple tank (water tank) was discussed.",
null,
"The diagram at the right depicts the pattern resulting from the propagation of water waves across the surface of the water. The waves propagate outward from the point sources, forming a series of concentric circles about the source. In the diagram, the thick lines represent wave crests and the thin lines represent wave troughs. The crests and troughs from the two sources interfere with each other at a regular rate to produce nodes (pictured in blue on the diagram) and antinodes (pictured in red) along the water surface. The nodal positions are locations where the water is undisturbed; the antinodal positions are locations where the water is undergoing maximum disturbances above and below the surrounding water level. One unique feature of the two-point source interference pattern is that the antinodal and nodal positions all lie along distinct lines. Each line can be described as a relatively straight hyperbola. The spatial separation between the antinodal and nodal lines in the pattern is related to the wavelength of the waves. The mathematical relationship will be explored later in this lesson. For now, we will investigate the underlying causes of this unique pattern and introduce some nomenclature (naming conventions) that will be utilized throughout the lesson.\n\nThe animation below shows a series of concentric circles about two point sources (labeled as S1 and S2). The pattern could be the result of water waves in a ripple tank resulting from two vibrating sources; or the result of sound waves from two speakers traveling through a room; or the result of two light waves moving through a room after passing through two slits or pinholes in a sheet of paper. Like the diagram above, the thick lines represent wave crests and the thin lines represent wave troughs. The red dots in the animation represent the antinodal positions; the blue dots represent the nodal positions. The red lines drawn through the antinodal points (red dots) are referred to as antinodal lines and the blue lines drawn through the nodal points (blue dots) are referred to as nodal lines.",
null,
"A naming and numbering system is used to refer to these antinodal and nodal lines. An antinodal line extends outward from the sources in the exact center of the pattern. This antinodal line is referred to as the central antinodal line. More antinodal lines are present to the left and to the right of the central antinodal line. These are referred to as the first antinodal line, the second antinodal line, the third antinodal line (if present), etc. Each antinodal line is separated by a nodal line. The nodal lines are also named; the first nodal line to the left or to the right of the central antinodal line is referred to as the first nodal line. The second nodal line and the third nodal line are found as one moves further to the left and to the right of the center of the pattern.\n\nEach line in the pattern is assigned a number, known as the order number and represented by the letter m. The numbering system associated with this pattern is just as creative as the naming system. The central antinodal line is assigned an order number of 0. The first antinodal line is assigned an order number of 1; the second antinodal line is assigned an order number of 2; the third antinodal line is assigned an order number of 3; etc. Nodal lines are assigned half-numbers. The first nodal line, located between the central antinodal line (m = 0) and the first antinodal line (m = 1) is assigned the order number of 0.5. The second nodal line, located between the first antinodal line (m = 1) and the second antinodal line (m = 2) is assigned the order number of 1.5. Finally, the third nodal line, located between the second antinodal line (m = 2) and the third antinodal line (m = 3) is assigned the order number of 2.5. Subsequently, if one were to start in the center of the pattern and observe the lines (both antinodal and nodal) and associated numbers to the left or to the right of the central antinodal line, the numbers would start at 0 and increase by one-half:\n\n0",
null,
"0.5",
null,
"1",
null,
"1.5",
null,
"2",
null,
"2.5",
null,
"etc.\n\nEach whole number is associated with an antinodal line and each half-number is associated with a nodal line. (The numbering and naming systems used here for nodal lines differs slightly from that used in many textbooks. The reason for the numbering system will be more clear after the next part of this lesson.)\n\n1. Observe the two-point source interference pattern shown below. Several points are marked and labeled with a letter.",
null,
"Which of the labeled points are ...\n\na. ... on nodal lines?\n\nb. ... on antinodal lines?\n\nc. ... formed as the result of constructive interference?\n\nd. ... formed as the result of destructive interference?\n\n2. Observe the two-point source interference pattern shown below. Several points are marked and labeled with a letter.",
null,
"Which of the labeled points are ...\n\na. ... on the central antinodal line?\n\nb. ... on the first antinodal line?\n\nc. ... on the second antinodal line?\n\nd. ... on the first nodal line?\n\ne. ... on the second nodal line?\n\nf. ... on the third nodal line?\n\nNext Section:"
] | [
null,
"http://www.physicsclassroom.com/Class/light/u12l1b2.gif",
null,
"http://www.physicsclassroom.com/Class/light/u12l3a1.gif",
null,
"http://www.physicsclassroom.com/Class/light/spacer.gif",
null,
"http://www.physicsclassroom.com/Class/light/spacer.gif",
null,
"http://www.physicsclassroom.com/Class/light/spacer.gif",
null,
"http://www.physicsclassroom.com/Class/light/spacer.gif",
null,
"http://www.physicsclassroom.com/Class/light/spacer.gif",
null,
"http://www.physicsclassroom.com/Class/light/spacer.gif",
null,
"http://www.physicsclassroom.com/Class/light/u12l3a2.gif",
null,
"http://www.physicsclassroom.com/Class/light/u12l3a3.gif",
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.9349368,"math_prob":0.96910286,"size":5984,"snap":"2022-27-2022-33","text_gpt3_token_len":1319,"char_repetition_ratio":0.19197324,"word_repetition_ratio":0.15009746,"special_character_ratio":0.2078877,"punctuation_ratio":0.11703958,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.96316016,"pos_list":[0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20],"im_url_duplicate_count":[null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2022-06-30T10:57:54Z\",\"WARC-Record-ID\":\"<urn:uuid:b5f8b224-e89d-4d4b-8f60-451f48fc6903>\",\"Content-Length\":\"173456\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:3eed0b72-5b30-425e-9671-c6c0a654bd65>\",\"WARC-Concurrent-To\":\"<urn:uuid:c4c3e93e-e83a-49a0-b978-d8644dfc82ad>\",\"WARC-IP-Address\":\"64.25.118.17\",\"WARC-Target-URI\":\"http://staging.physicsclassroom.com/class/light/u12l3a\",\"WARC-Payload-Digest\":\"sha1:7NZ2DAOKRTMI3MGMBQOY75YKJSJSXSDL\",\"WARC-Block-Digest\":\"sha1:67XWPD2IL4IIQM542J7D72N6OJOHEDL4\",\"WARC-Identified-Payload-Type\":\"application/xhtml+xml\",\"warc_filename\":\"/cc_download/warc_2022/CC-MAIN-2022-27/CC-MAIN-2022-27_segments_1656103671290.43_warc_CC-MAIN-20220630092604-20220630122604-00448.warc.gz\"}"} |
https://www.calculatoratoz.com/en/activity-of-anodic-electrolyte-of-concentration-cell-with-transference-calculator/Calc-23895 | [
"## Activity of anodic electrolyte of concentration cell with transference Solution\n\nSTEP 0: Pre-Calculation Summary\nFormula Used\nAnodic Ionic Activity = Cathodic Ionic Activity/(exp((EMF of the Cell*[Faraday])/(Transport Number of Anion*[R]*Temperature)))\nThis formula uses 3 Constants, 1 Functions, 5 Variables\nConstants Used\n[R] - Universal gas constant Value Taken As 8.31446261815324 Joule / Kelvin * Mole\ne - Napier's constant Value Taken As 2.71828182845904523536028747135266249\nFunctions Used\nexp - Exponential function, exp(Number)\nVariables Used\nAnodic Ionic Activity - (Measured in Mole per Kilogram) - The Anodic ionic activity is the measure of the effective concentration of a molecule or ionic species in a anodic half cell.\nCathodic Ionic Activity - (Measured in Mole per Kilogram) - The Cathodic ionic activity is the measure of the effective concentration of a molecule or ionic species in a cathodic half cell.\nEMF of the Cell - (Measured in Volt) - The EMF of the Cell or electromotive force of a cell is the maximum potential difference between two electrodes of a cell.\nTransport Number of Anion - The Transport Number of Anion is ratio of current carried by anion to total current.\nTemperature - (Measured in Kelvin) - Temperature is the degree or intensity of heat present in a substance or object.\nSTEP 1: Convert Input(s) to Base Unit\nCathodic Ionic Activity: 0.2 Mole per Kilogram --> 0.2 Mole per Kilogram No Conversion Required\nEMF of the Cell: 0.5 Volt --> 0.5 Volt No Conversion Required\nTransport Number of Anion: 50 --> No Conversion Required\nTemperature: 85 Kelvin --> 85 Kelvin No Conversion Required\nSTEP 2: Evaluate Formula\nSubstituting Input Values in Formula\nEvaluating ... ...\na1 = 0.0510640098337223\nSTEP 3: Convert Result to Output's Unit\n0.0510640098337223 Mole per Kilogram --> No Conversion Required\n0.0510640098337223 Mole per Kilogram <-- Anodic Ionic Activity\n(Calculation completed in 00.031 seconds)\nYou are here -\nHome »\n\n## Credits\n\nCreated by Prashant Singh\nK J Somaiya College of science (K J Somaiya), Mumbai\nPrashant Singh has created this Calculator and 700+ more calculators!\nVerified by Prerana Bakli\nNational Institute of Technology (NIT), Meghalaya\nPrerana Bakli has verified this Calculator and 800+ more calculators!\n\n## < 10+ Activity of electrolytes Calculators\n\nActivity coefficient of cathodic electrolyte of concentration cell with transference\nCathodic Activity Coefficient = (exp((EMF of the Cell*[Faraday])/(2*Transport Number of Anion*[R])))*((Anodic Electrolyte Molality*Anodic Activity Coefficient)/Cathodic Electrolyte Molality) Go\nActivity coefficient of anodic electrolyte of concentration cell with transference\nAnodic Activity Coefficient = ((Cathodic Electrolyte Molality*Cathodic Activity Coefficient)/Anodic Electrolyte Molality)/(exp((EMF of the Cell*[Faraday])/(2*Transport Number of Anion*[R]))) Go\nActivity coefficient of cathodic electrolyte of concentration cell without transference\nCathodic Activity Coefficient = (exp((EMF of the Cell*[Faraday])/(2*[R]*Temperature)))*((Anodic Electrolyte Molality*Anodic Activity Coefficient)/Cathodic Electrolyte Molality) Go\nActivity Coefficient of Anodic Electrolyte of Concentration Cell without Transference\nAnodic Activity Coefficient = ((Cathodic Electrolyte Molality*Cathodic Activity Coefficient)/Anodic Electrolyte Molality)/(exp((EMF of the Cell*[Faraday])/(2*[R]*Temperature))) Go\nActivity of cathodic electrolyte of concentration cell with transference\nCathodic Ionic Activity = (exp((EMF of the Cell*[Faraday])/(Transport Number of Anion*[R]*Temperature)))*Anodic Ionic Activity Go\nActivity of anodic electrolyte of concentration cell with transference\nAnodic Ionic Activity = Cathodic Ionic Activity/(exp((EMF of the Cell*[Faraday])/(Transport Number of Anion*[R]*Temperature))) Go\nActivity of cathodic electrolyte of concentration cell without transference\nCathodic Ionic Activity = Anodic Ionic Activity*(exp((EMF of the Cell*[Faraday])/([R]*Temperature))) Go\nActivity of anodic electrolyte of concentration cell without transference\nAnodic Ionic Activity = Cathodic Ionic Activity/(exp((EMF of the Cell*[Faraday])/([R]*Temperature))) Go\nActivities of electrolyte given concentration and fugacity\nIonic activity = (Actual concentration^2)*(Fugacity^2) Go\nActivity coefficient given the ionic activity\nActivity Coefficient = (Ionic activity/Molality) Go\n\n## Activity of anodic electrolyte of concentration cell with transference Formula\n\nAnodic Ionic Activity = Cathodic Ionic Activity/(exp((EMF of the Cell*[Faraday])/(Transport Number of Anion*[R]*Temperature)))\n\n## What is concentration cell with transference?\n\nA cell in which the transference of a substance from a system of high concentration to one at low concentration results in the production of electrical energy is called a concentration cell. It consists of two half cells having two identical electrodes and identical electrolytes but with different concentrations. EMF of this cell depends upon the difference of concentration. In a concentration cell with transference, there is a direct transference of electrolytes. The same electrode is reversible with respect to one of the ions of the electrolyte.\n\n## How to Calculate Activity of anodic electrolyte of concentration cell with transference?\n\nActivity of anodic electrolyte of concentration cell with transference calculator uses Anodic Ionic Activity = Cathodic Ionic Activity/(exp((EMF of the Cell*[Faraday])/(Transport Number of Anion*[R]*Temperature))) to calculate the Anodic Ionic Activity, The Activity of anodic electrolyte of concentration cell with transference formula is defined as the relation with emf of the cell and with the transport number of the anion in the electrolytic solution. Anodic Ionic Activity is denoted by a1 symbol.\n\nHow to calculate Activity of anodic electrolyte of concentration cell with transference using this online calculator? To use this online calculator for Activity of anodic electrolyte of concentration cell with transference, enter Cathodic Ionic Activity (a2), EMF of the Cell (Ecell), Transport Number of Anion (t-) & Temperature (T) and hit the calculate button. Here is how the Activity of anodic electrolyte of concentration cell with transference calculation can be explained with given input values -> 0.051064 = 0.2/(exp((0.5*[Faraday])/(50*[R]*85))).\n\n### FAQ\n\nWhat is Activity of anodic electrolyte of concentration cell with transference?\nThe Activity of anodic electrolyte of concentration cell with transference formula is defined as the relation with emf of the cell and with the transport number of the anion in the electrolytic solution and is represented as a1 = a2/(exp((Ecell*[Faraday])/(t-*[R]*T))) or Anodic Ionic Activity = Cathodic Ionic Activity/(exp((EMF of the Cell*[Faraday])/(Transport Number of Anion*[R]*Temperature))). The Cathodic ionic activity is the measure of the effective concentration of a molecule or ionic species in a cathodic half cell, The EMF of the Cell or electromotive force of a cell is the maximum potential difference between two electrodes of a cell, The Transport Number of Anion is ratio of current carried by anion to total current & Temperature is the degree or intensity of heat present in a substance or object.\nHow to calculate Activity of anodic electrolyte of concentration cell with transference?\nThe Activity of anodic electrolyte of concentration cell with transference formula is defined as the relation with emf of the cell and with the transport number of the anion in the electrolytic solution is calculated using Anodic Ionic Activity = Cathodic Ionic Activity/(exp((EMF of the Cell*[Faraday])/(Transport Number of Anion*[R]*Temperature))). To calculate Activity of anodic electrolyte of concentration cell with transference, you need Cathodic Ionic Activity (a2), EMF of the Cell (Ecell), Transport Number of Anion (t-) & Temperature (T). With our tool, you need to enter the respective value for Cathodic Ionic Activity, EMF of the Cell, Transport Number of Anion & Temperature and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.\nHow many ways are there to calculate Anodic Ionic Activity?\nIn this formula, Anodic Ionic Activity uses Cathodic Ionic Activity, EMF of the Cell, Transport Number of Anion & Temperature. We can use 2 other way(s) to calculate the same, which is/are as follows -\n• Anodic Ionic Activity = Cathodic Ionic Activity/(exp((EMF of the Cell*[Faraday])/([R]*Temperature)))\n• Anodic Ionic Activity = Cathodic Ionic Activity/(exp((EMF of the Cell*Number of positive and negative ions*Valencies of positive and negative ions*[Faraday])/(Transport Number of Anion*Total number of ions*[R]*Temperature)))",
null,
"Let Others Know"
] | [
null,
"https://www.calculatoratoz.com/Images/share.png",
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.8938948,"math_prob":0.9669371,"size":1751,"snap":"2022-27-2022-33","text_gpt3_token_len":358,"char_repetition_ratio":0.20721236,"word_repetition_ratio":0.11155379,"special_character_ratio":0.19360365,"punctuation_ratio":0.06993007,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9954635,"pos_list":[0,1,2],"im_url_duplicate_count":[null,null,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2022-06-26T10:39:41Z\",\"WARC-Record-ID\":\"<urn:uuid:fec6d238-0377-4881-8621-324279698d84>\",\"Content-Length\":\"110701\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:4fc274a0-d684-4423-9a79-e245e0b5c46a>\",\"WARC-Concurrent-To\":\"<urn:uuid:0a9735b9-1de5-44ef-80cc-c1fa2d1b6d22>\",\"WARC-IP-Address\":\"67.43.15.151\",\"WARC-Target-URI\":\"https://www.calculatoratoz.com/en/activity-of-anodic-electrolyte-of-concentration-cell-with-transference-calculator/Calc-23895\",\"WARC-Payload-Digest\":\"sha1:OHDJWJJG6WQT3QPJTCAYKYPLPAU2CBWW\",\"WARC-Block-Digest\":\"sha1:C6KJTGT6AOHAVGRMUWJVAGPGMY2PHOPG\",\"WARC-Identified-Payload-Type\":\"application/xhtml+xml\",\"warc_filename\":\"/cc_download/warc_2022/CC-MAIN-2022-27/CC-MAIN-2022-27_segments_1656103205617.12_warc_CC-MAIN-20220626101442-20220626131442-00632.warc.gz\"}"} |
https://www.includehelp.com/python/why-the-output-of-numpy-where-condition-is-not-an-array-but-a-tuple-of-arrays.aspx | [
"# Why the output of numpy.where(condition) is not an array, but a tuple of arrays?\n\nLearn, why the output of numpy.where(condition) is not an array, but a tuple of arrays?\nSubmitted by Pranit Sharma, on February 21, 2023\n\nNumPy is an abbreviated form of Numerical Python. It is used for different types of scientific operations in python. Numpy is a vast library in python which is used for almost every kind of scientific or mathematical operation. It is itself an array which is a collection of various methods and functions for processing the arrays.\n\n## Output of numpy.where(condition)\n\nBasically, numpy.where do have 2 'operational modes', first one returns the indices, where the condition is True and if optional parameters x and y are present (same shape as condition, or broadcastable to such shape!), it will return values from x when the condition is True otherwise from y. So, this makes where more versatile and enables it to be used more often.\n\nIt returns a tuple of length equal to the dimension of the numpy ndarray on which it is called (in other words ndim) and each item of the tuple is a numpy ndarray of indices of all those values in the initial ndarray for which the condition is True.\n\nWhen it returns a tuple, each element of the tuple refers to a dimension. We can understand with the help of the following example,\n\n## Python code to demonstrate why the output of numpy.where(condition) is not an array, but a tuple of arrays\n\n```# Import numpy\nimport numpy as np\n\n# Creating a numpy array\narr = np.array([\n[1, 2, 3, 4, 5, 6],\n[-2, 1, 2, 3, 4, 5]])\n\n# Display original array\nprint(\"Original array:\\n\",arr,\"\\n\")\n\n# using where\nres = np.where(arr > 3)\n\n# Display result\nprint(\"Result:\\n\",res)\n```\n\nOutput:",
null,
"As we can see, the first element of the tuple refers to the first dimension of relevant elements; the second element refers to the second dimension."
] | [
null,
"https://www.includehelp.com/python/images/output-of-numpy-where-condition.jpg",
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.8334539,"math_prob":0.9571684,"size":1909,"snap":"2023-14-2023-23","text_gpt3_token_len":447,"char_repetition_ratio":0.12860893,"word_repetition_ratio":0.09756097,"special_character_ratio":0.23677318,"punctuation_ratio":0.13265306,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.99745727,"pos_list":[0,1,2],"im_url_duplicate_count":[null,1,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2023-06-03T12:19:12Z\",\"WARC-Record-ID\":\"<urn:uuid:5751479d-35d0-490e-abac-556347c26d99>\",\"Content-Length\":\"139001\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:1905a240-cadd-4e95-bf90-4a274d0f639d>\",\"WARC-Concurrent-To\":\"<urn:uuid:80f0ef13-53aa-43b4-af3d-0b0a3b511581>\",\"WARC-IP-Address\":\"104.26.1.56\",\"WARC-Target-URI\":\"https://www.includehelp.com/python/why-the-output-of-numpy-where-condition-is-not-an-array-but-a-tuple-of-arrays.aspx\",\"WARC-Payload-Digest\":\"sha1:JPZ4UQZ7UKWDDU2GW7NGIH5QYTF23B4U\",\"WARC-Block-Digest\":\"sha1:4FQPBOL6QDMMTWC3F3VC2B2QZWHIXEMW\",\"WARC-Identified-Payload-Type\":\"application/xhtml+xml\",\"warc_filename\":\"/cc_download/warc_2023/CC-MAIN-2023-23/CC-MAIN-2023-23_segments_1685224649193.79_warc_CC-MAIN-20230603101032-20230603131032-00198.warc.gz\"}"} |
https://divisiblebot.com/4-digit-numbers-divisible-by/224/ | [
"# 4 Digit Numbers Divisible By 224\n\nIn this article we will look at 4 digit numbers and find out how many of them are divisible by the number 224.\n\nWhen we are talking about four digit numbers, we obviously mean numbers that have four digits in them.\n\nFour-digit numbers range from 1000-9999 and there are a total of 9000 4-digit numbers.\n\nWe can check whether a four digit number is divisible by 224 by dividing it by 224 and getting a result that is a whole number with no remainder (decimal places).\n\nLuckily for you, I've already done the calculation for you. Below are all of the four digit numbers divisible by 224.\n\n## How Many Four Digit Numbers are Divisible By 224?\n\nThere are a total of 40 four-digit numbers that are divisible by 224.\n\nI have listed all of the 4-digit numbers that are divisible by 224 in an ascending list below:\n\n1120, 1344, 1568, 1792, 2016, 2240, 2464, 2688, 2912, 3136, 3360, 3584, 3808, 4032, 4256, 4480, 4704, 4928, 5152, 5376, 5600, 5824, 6048, 6272, 6496, 6720, 6944, 7168, 7392, 7616, 7840, 8064, 8288, 8512, 8736, 8960, 9184, 9408, 9632, 9856\n\n## How Many Four Digit Numbers are Not Divisible By 224?\n\nWe know that there are a total of 9000 four digit numbers, and that 40 of them are divisible by 224. So we can easily work out that there are 8960 that are not divisible by 224:\n\n9000 - 40 = 8960\n\n## What is the Sum of All Four Digit Numbers Divisible By 224?\n\nMaybe you need to find out what the sum of all the 4 digit numbers that are divisible by 224. You can do it manually yourself using the list above, but I'm a bot, and bots make light work of sums like this.\n\nThe sum of all 4-digit numbers divisible by 224 is 219520.\n\n## What is the Smallest Four Digit Number Divisible By 224?\n\nSince I was kind to you, I listed the numbers above in ascending order. This means that the smallest/lowest 4-digit number that is divisible by 224 is the first number on that list. In this case, the number 1120 is the smallest four digit number divisible by 224.\n\n## What is the Largest Four Digit Number Divisible By 224?\n\nThe largest/greatest 4-digit number that is divisible by 224 is, you guessed it, the last number on that list above. In this case, the number 9856 is the largest four digit number divisible by 224.\n\n## How Many Even Four Digit Numbers Are Divisible By 224?\n\nIf you want to get all of the even 4-digit numbers that are divisible by 224, I can do that too.\n\nThere are a total of 40 even four digit numbers divisible by 224.\n\n1120, 1344, 1568, 1792, 2016, 2240, 2464, 2688, 2912, 3136, 3360, 3584, 3808, 4032, 4256, 4480, 4704, 4928, 5152, 5376, 5600, 5824, 6048, 6272, 6496, 6720, 6944, 7168, 7392, 7616, 7840, 8064, 8288, 8512, 8736, 8960, 9184, 9408, 9632, 9856\n\n## How Many Odd Four Digit Numbers Are Divisible By 224?\n\nSince we listed all of the even numbers, we might as well get all of the odd 4-digit numbers that are divisible by 224 as well.\n\nThere are a total of 0 odd four digit numbers divisible by 224.\n\nIf you made it this far down the page, you must really, really, love lists of four digit numbers divisible by 224!\n\nHopefully, you found this article useful and educational and you can now go forth and try to calculate more divisibility problems by yourself!\n\nIf you found this content useful in your research, please do us a great favor and use the tool below to make sure you properly reference us wherever you use it. We really appreciate your support!\n\n• \"4 Digit Numbers Divisible By 224\". DivisibleBot.com. Accessed on October 16, 2021. https://divisiblebot.com/4-digit-numbers-divisible-by/224/.\n\n• \"4 Digit Numbers Divisible By 224\". DivisibleBot.com, https://divisiblebot.com/4-digit-numbers-divisible-by/224/. Accessed 16 October, 2021."
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.83590454,"math_prob":0.95727515,"size":6247,"snap":"2021-43-2021-49","text_gpt3_token_len":1848,"char_repetition_ratio":0.3925997,"word_repetition_ratio":0.18626529,"special_character_ratio":0.3544101,"punctuation_ratio":0.16102332,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.99215037,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2021-10-16T14:24:06Z\",\"WARC-Record-ID\":\"<urn:uuid:5222bb63-1696-4664-913a-d542f4762df5>\",\"Content-Length\":\"17759\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:82f6759d-1573-40bd-9c25-23a4e3f0b997>\",\"WARC-Concurrent-To\":\"<urn:uuid:1e50fa31-2a76-44b0-bfdf-10d1acb3c40b>\",\"WARC-IP-Address\":\"104.131.1.205\",\"WARC-Target-URI\":\"https://divisiblebot.com/4-digit-numbers-divisible-by/224/\",\"WARC-Payload-Digest\":\"sha1:OBJ5YM7OWVZNVZZDXDINAKLKRQOYHLTZ\",\"WARC-Block-Digest\":\"sha1:AQZW3T2QLNEX2PVTFCFPUP6P7VY2UJHN\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2021/CC-MAIN-2021-43/CC-MAIN-2021-43_segments_1634323584886.5_warc_CC-MAIN-20211016135542-20211016165542-00373.warc.gz\"}"} |
https://www.blog.sindibad.tn/action-physics-most-fundamental-property/ | [
"# Is ACTION Physics Most Fundamental Property?\n\n##### Definition of Fundamental Properties\n\nTo explain the universe, there are main four fundamental properties are available. With the help of these fundamental properties we can know measure surroundings.\n\nThe four fundamental properties are\n\n▪ Length\n\n▪ Mass\n\n▪ Time\n\n▪ Charge\n\nLength\n\nLength can be defined as the travelled distance by the light in a certain time. The unit of the measured length is meter. The meter is the length of the path travelled by the light in vacuum during a time interval of",
null,
"of a second.\n\nMass\n\nThe amount of substance containing in an object, is known as mass of that object. Everywhere the mass of the object is constant. Like, if one object has a mass of 1 kg on Earth’s surface, the mass will be same on sun’s surface, Moon surface. Mass is a scalar quantity.\n\nThe expression for mass of an object is W=mg\n\nWhere, W is the weight of the object, M is the mass of the object, and G is the gravitational acceleration.\n\nKilogram (Kg) is used to measure of mass, i.e. kilogram is equal to the mass of the international prototype of the kilogram\n\nTime\n\nTime is the",
null,
"of mean solar day.\n\nSecond (s) is the measurement of time, i.e. the second is duration of 192631770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the cesium 133 atom.\n\nCharge\n\nCharge can be defined as the amount of transfer of 6.24×1018 number of electrons. The unit of charge is coulomb. There are two types of electric charges, i.e. positive charge and negative charge. Charge is a fundamental property of matter. Because of charge matter can experience a force when the matter is placed in a electromagnetic field.\n\nIt’s about time we discussed an obscure concept in physics that may be more fundamental than energy and entropy and perhaps time itself. That’s right – the time has come for Action.\n\n## Like it? Share with your friends!",
null,
"Dislike\n297\nDislike",
null,
"love\n2676\nlove",
null,
"omg\n2081\nomg",
null,
"scary\n1784\nscary",
null,
"wtf\n892\nwtf"
] | [
null,
"https://media.cheggcdn.com/study/caf/caf36e2a-9b8a-4992-940f-b409faf9c7eb/DC-274V1.png",
null,
"https://media.cheggcdn.com/study/2c5/2c509b18-3626-4ca9-b548-3335b677489f/DC-274V2.png",
null,
"https://www.blog.sindibad.tn/wp-content/plugins/boombox-theme-extensions/boombox-reactions/svg/dislike.svg",
null,
"https://www.blog.sindibad.tn/wp-content/plugins/boombox-theme-extensions/boombox-reactions/svg/love_2.svg",
null,
"https://www.blog.sindibad.tn/wp-content/plugins/boombox-theme-extensions/boombox-reactions/svg/omg_2.svg",
null,
"https://www.blog.sindibad.tn/wp-content/plugins/boombox-theme-extensions/boombox-reactions/svg/scary_2.svg",
null,
"https://www.blog.sindibad.tn/wp-content/plugins/boombox-theme-extensions/boombox-reactions/svg/wtf_anime.svg",
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.9184728,"math_prob":0.9756688,"size":1960,"snap":"2022-27-2022-33","text_gpt3_token_len":430,"char_repetition_ratio":0.14263804,"word_repetition_ratio":0.005830904,"special_character_ratio":0.2122449,"punctuation_ratio":0.09768637,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9629335,"pos_list":[0,1,2,3,4,5,6,7,8,9,10,11,12,13,14],"im_url_duplicate_count":[null,2,null,2,null,null,null,null,null,null,null,null,null,null,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2022-08-12T21:21:49Z\",\"WARC-Record-ID\":\"<urn:uuid:38c988c4-e9f5-4351-b0e1-c56501bc88e9>\",\"Content-Length\":\"483688\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:6f55a555-576f-47b5-8590-3f15902336ad>\",\"WARC-Concurrent-To\":\"<urn:uuid:c46ef706-cbc1-4640-8da0-2df62cee14b5>\",\"WARC-IP-Address\":\"46.105.57.169\",\"WARC-Target-URI\":\"https://www.blog.sindibad.tn/action-physics-most-fundamental-property/\",\"WARC-Payload-Digest\":\"sha1:P3XDIV7ECIS3T7WJ4QPVAFIRNVQ6RJYI\",\"WARC-Block-Digest\":\"sha1:NKXS6D2L6F5CZMMTHDIJZQHVA7RBYC7K\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2022/CC-MAIN-2022-33/CC-MAIN-2022-33_segments_1659882571758.42_warc_CC-MAIN-20220812200804-20220812230804-00209.warc.gz\"}"} |
http://psfx.org.br/forum/archive.php?id=entex-pse-discontinued-b03b2c | [
"# entex pse discontinued\n\nFree math problem solver answers your algebra homework questions with step-by-step explanations. To figure out what the variable is, you need to get it by itself on one side of the equals sign. In 1637, René Descartes published La Géométrie, inventing analytic geometry and introducing modern algebraic notation. This article presents algebra’s history, tracing the evolution of the equation, number systems, symbols, and the modern abstract structural view of algebra. Consider the following situation. I am at least 16 years of age. I am going on a trip. How would this happen? François Viète's work on new algebra at the close of the 16th century was an important step towards modern algebra. Math explained in easy language, plus puzzles, games, quizzes, worksheets and a forum. A quadratic equation is a polynomial equation of degree 2 in one variable of type f(x) = ax2 + bx + c. The cubic polynomials are polynomials with degree 3. To ask a question, go to a section to the right and select \"Ask Free Tutors\".Most sections have archives with hundreds of problems solved by the tutors. Students, teachers, parents, and everyone can find solutions to their math problems instantly. Grade 9 ratio algebra questions with answers are presented. Algebra 1 Expressions Equations And Applications P. Foerster ed. Donate or volunteer today! { x } ^ { 2 } - 4 x - 5 = 0. x2 − 4x − 5 = 0. Algebra Questions with Answers for Grade 9. A total of 8 items can fit in the bag. GCSE Maths Algebra learning resources for adults, children, parents and teachers. Kids can use our free, exciting games to play and compete with their friends as they progress in this subject! Splitting the 12 into 10 + 2 gives us an opportunity to complete the question mentally using the distributive property. On this page, you will find Algebra worksheets mostly for middle school students on algebra topics such as algebraic expressions, equations and graphing functions.. Take our high school math courses in Pre-algebra, Algebra 1, Algebra 2 and Geometry.We have also prepared practice tests for the SAT and ACT. Algebra concepts that pupils can work on here include: Solving and writing variable equations to find answers to real-world problems Support us to become better via paypal! Available as a mobile and desktop website as well as native iOS and Android apps. To graph a linear equation in slope-intercept form, we can use the information given by that form. Because 6 − 2 = 4. I am at least 16 years of age. To recall, a polynomial equation is an equation consisting of variables, exponents and coefficients. Free math lessons and math homework help from basic math to algebra, geometry and beyond. GeoGebra Math Apps Get our free online math tools for graphing, geometry, 3D, and more! In one bag I carry some t-shirts, shorts, and towels. Printable in convenient PDF format. Basic math formulas Algebra word problems. Try Math Solver. Easy stuff. Whatever is left on the other side of the equals sign is your answer. Let’s form the equation now. To figure out what the variable is, you need to get it by itself on one side of the equals sign. For a trigonometry equation, the expression includes the trigonometric functions of a variable. Test your knowledge of introductory Algebra with this Algebra practice exam. Simply put, algebra is about finding the unknown or putting real life variables into equations and then solving them. This Algebra 1 math course is divided into 12 chapters and each chapter is divided into several lessons. Lessons. Solutions and detailed explanations are … Online math solver with free step by step solutions to algebra, calculus, and other math problems. Condition is \"Good\". The price of h pieces of candy is \\$2.00. Compatible numbers. Our mission is to provide a free, world-class education to anyone, anywhere. Free Pre-Algebra, Algebra, Trigonometry, Calculus, Geometry, Statistics and Chemistry calculators step-by-step . These Equations Worksheets are a good resource for students in the 5th Grade through the 8th Grade. For instance, the unit circle is the set of zeros of x^2+y^2=1 and is an algebraic variety, as are all of the conic sections. Desmos offers best-in-class calculators, digital math activities, and curriculum to help every student love math and love learning math. Online Algebra Solver I advice you to sign up for this algebra solver. These Algebra 1 Equations Worksheets will produce distance, rate, and time word problems with ten problems per worksheet. Email. Learn how to solve an equation with plenty of examples. If we add some weight to just one side, the scale will tip on one side and the two sides are no longer in balance. Math skills assessment. As long as you do the same thing to both sides of the equation it will remain balanced. x + 13 = 24: Each piece of candy costs 25 cents. All the trigonometric equations are all considered as algebraic functions. For math, science, nutrition, history, geography, engineering, mathematics, linguistics, sports, finance, music… Wolfram|Alpha brings expert-level knowledge and capabilities to the broadest possible range of people—spanning all professions and education levels. Faced by high-school and college students Statistics and Chemistry calculators step-by-step a filter. Most common problems in algebra and basic math to algebra, geometry and introducing algebraic. Multiply 35 × 2 to get it by itself on one side of the equals.!, multiplication, and very flexible brackets on both sides of the equation will use my information to me! In one bag I carry some t-shirts, shorts, and more formal. Ten problems per worksheet with free step by step explanation on how to solve equation. In cases where one can not easily add the other factor before multiplying equations up to solving equations 2^3! } = 4^9 \\$ \\$ 4^ { x+1 } = 4^9 \\$ \\$ step 1 algebra solver resource where can. Information to send me a newsletter try to get 70 strong foundation math. Missing numbers worksheets for younger students they progress in this subject struggling with it thing... Numbers and/or variables on both sides, like this: x + =! Test and worksheet Generators for math teachers Just punch in your browser in. Put, algebra, in particular, from rings price of h pieces of candy costs 25.! 3D, and towels shirts + 2 = 9 × 4 costs cents. } - 4 x - 5 = 0. x2 − 4x − 5 0... Desmos offers best-in-class calculators, digital math activities, and time word problems with ten problems per worksheet +! Variables, exponents and coefficients multivariate polynomials and calculus faced by high-school and college students help. Are common and variables are the norm Circle ; Factoring different roles expressions are set equal to each other and... + … free algebra solver specific numbers - Calculate properties of planes, coordinates and shapes! And a forum high-school and college students, in particular, from rings know about then solving.... Students, teachers, parents, and division the difference algebraic geometry equations expression and in... Automatically answer the most common problems in algebra, in particular, from rings introductory with!: False: 2 z are equations but 6p > 77 is equal. Have exactly the same thing to both sides, like this: x + 2 21. 77 is not solver I advice you to sign up for this algebra solver and algebra calculator showing step step. Kids can use the information given by that form to help every student math! Step-By-Step... Pre algebra explanation on how to reach the answer 1 worksheets! Have to react to a penalty kick ; equation of Circle ; Factoring a descent that! Solving them 500 to his two sons algebraic geometry is a descent that. Is left on the other factor before multiplying provided in each math worksheets a. 'S algebra 1 expressions equations and Applications P. Foerster ed 9 × 4 quizzes... And math homework help from basic math section plus solving simple equations, system of equations, percent problems relations. Will be twenty-four years old equation of Circle ; Factoring the 5th Grade through the 8th.... Plus solving simple equations, simplifying expressions including expressions with fractions, slopes! Website uses cookies to ensure you get the variable is in your equation and it calculates the.... Any expression you choose per worksheet gcse Maths algebra learning resources for adults algebraic geometry equations children, parents teachers. Equations worksheets are printable PDF exercises of the equals sign equation is an equation consisting of variables exponents... Like this: x + 2 = 9 × 4 by using this uses! 4Ac + 2ad ) True: False: 2 it by itself on one side of the highest.... Same way, what would depict an inequality 2 to get 420 can solve all problems the. Infinite algebra 1 worksheets created with Infinite algebra 1 write: it is as! The 12 into 10 + 2 = 9 × 4 's algebra 1 worksheets created with Infinite algebra 1 means. Math homework help from basic math to algebra, in particular, from rings to sign for... S what equations are usually set up with numbers and/or variables on sides!, illuminating, engaging, and everyone can find solutions to their math problems instantly Generators... 1 expressions equations and Applications P. Foerster ed solve a Diophantine equation whose solutions have recursive. Equation and it calculates the answer is 6, right their math instantly. Math tools for graphing, geometry, Statistics and Chemistry calculators step-by-step side ( LHS ) of past. And desktop website as well as native iOS and Android apps free questions... Years she will be twenty-four years old and worksheet Generators for math teachers Just in... Specific numbers difference between them, difference between expression and equations in algebra, equations and Applications P. Foerster.. Rate, and other math problems instantly ten problems per worksheet you need to get it by itself algebra... Step-By-Step... Pre algebra 9 = z are equations but 6p > 77 is not equal to algebra. Course is divided into 12 chapters and each chapter is divided into several lessons answer! With digits or in words distance, rate, and other math problems instantly starts off with missing. Lessons and math homework help from basic math to algebra, geometry, 3D, and towels in which expressions. Desktop website as well as native iOS and Android apps math app expression and equations in algebra are polynomial. \\$ 2.00 one side of the equations in algebra usually means finding out what the variable itself! That point to draw the entire line printable PDF exercises of algebraic geometry equations equation it will remain.... Problems in algebra are: polynomial equations are all about- “ equating one quantity with ”. Your equation and it calculates the answer keys an equation in slope-intercept form we. Of candy is \\$ 2.00 and it calculates the answer like the linear equations + free., coordinates and 3D shapes step-by-step... Pre algebra two sons point the line is and... + 2ad ) True: False: 2 are set equal to the right-hand side gives you step... Same way, what would depict an inequality shapes step-by-step... Pre algebra,! The web or with our math app information given by that form on... Here is the difference between them, difference between expression and equations in algebra calculus. Page starts off with some missing numbers worksheets for younger students, percent problems relations... Brush up on algebra I given by that form algebra at your own pace build... Linear equations plus puzzles, games, quizzes, worksheets and a forum 8 items fit. 6P > 77 is not equal to the right-hand side ( RHS ) of the highest quality Eleni is years..."
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.9097653,"math_prob":0.9896229,"size":11826,"snap":"2021-21-2021-25","text_gpt3_token_len":2538,"char_repetition_ratio":0.14997463,"word_repetition_ratio":0.1475996,"special_character_ratio":0.2189244,"punctuation_ratio":0.15226877,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.99831,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2021-06-21T10:42:02Z\",\"WARC-Record-ID\":\"<urn:uuid:0e0525f1-c699-4ec1-8225-1997773a08fd>\",\"Content-Length\":\"29569\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:cbab0189-d6d9-49d3-b55c-9538481e8179>\",\"WARC-Concurrent-To\":\"<urn:uuid:5487d4a6-97fd-4618-8f23-95cae279db91>\",\"WARC-IP-Address\":\"187.17.111.35\",\"WARC-Target-URI\":\"http://psfx.org.br/forum/archive.php?id=entex-pse-discontinued-b03b2c\",\"WARC-Payload-Digest\":\"sha1:ATO4ZCAALYZAADJQU2VEG42JCEZK3KGB\",\"WARC-Block-Digest\":\"sha1:6D6MV6XHML2WEFM24BEJUJSB5TDX7EHC\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2021/CC-MAIN-2021-25/CC-MAIN-2021-25_segments_1623488269939.53_warc_CC-MAIN-20210621085922-20210621115922-00286.warc.gz\"}"} |
https://brainmass.com/statistics/correlation-and-regression-analysis/multiple-regression-example-real-life-638088 | [
"Explore BrainMass\n\n# Multiple Regression Example from Real Life\n\nThis content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!\n\nIdentify a research question from your professional life or research interests that could be addressed with multiple regression with two predictor variables. Describe the predictor variables ( X1, X2), the outcome variable ( Y), and the associated measurement scales. Articulate the expected outcome. Indicate why multiple regression would be an appropriate analysis for this research question.\n\nhttps://brainmass.com/statistics/correlation-and-regression-analysis/multiple-regression-example-real-life-638088\n\n#### Solution Preview\n\nResearch question:\n\nIs there a significant relationship between the annual salary, the education level (in years), and the working experience (in years)?\n\nHere, the outcome variable (Y) is the annual salary, ...\n\n#### Solution Summary\n\nThe Solution uses an example from real life for a research question with variables and measurement scales.\n\n\\$2.19"
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.8549699,"math_prob":0.53327185,"size":1077,"snap":"2020-45-2020-50","text_gpt3_token_len":218,"char_repetition_ratio":0.1248835,"word_repetition_ratio":0.0,"special_character_ratio":0.19591458,"punctuation_ratio":0.15,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.96548617,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2020-11-30T14:04:28Z\",\"WARC-Record-ID\":\"<urn:uuid:7419d6d8-e239-4c26-bc01-7dfbd1a14f51>\",\"Content-Length\":\"39549\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:84e0237d-754b-45fa-a237-8daebb60c3a8>\",\"WARC-Concurrent-To\":\"<urn:uuid:1b72add6-545f-4c36-9fc5-9c67d7ce68e1>\",\"WARC-IP-Address\":\"65.39.198.123\",\"WARC-Target-URI\":\"https://brainmass.com/statistics/correlation-and-regression-analysis/multiple-regression-example-real-life-638088\",\"WARC-Payload-Digest\":\"sha1:VFADKDJCF7MY2M3P2YDSQKVDNUXGXSWV\",\"WARC-Block-Digest\":\"sha1:PDAOQQS7L25ALYFGLVBVSWJE2IKQITRR\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2020/CC-MAIN-2020-50/CC-MAIN-2020-50_segments_1606141216175.53_warc_CC-MAIN-20201130130840-20201130160840-00043.warc.gz\"}"} |
https://theviralcode.com/2017/08/15/binary-search-python/ | [
"Binary Search | Python\n\nBinary Search implementation in Python\n\ndef binary_search(arr,ele):\n\"\"\"\nbinary_search works only on sorted array, also it follows divide and conquer fundamentals\n\"\"\"\n\nfirst = 0\nlast = len(arr) - 1 # as indexing starts at 0\nfound = False\n\nmid = (first+last)/2 # to get mid point of array\n\nif arr[mid] == ele:\nfound = True\nelse:\nif ele < arr[mid]:\nlast = mid - 1\nelse:\nfirst = mid + 1\n\nreturn found\n\nb = binary_search([1,2,3,4,5],2)\nprint b"
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.84415776,"math_prob":0.9108552,"size":992,"snap":"2022-05-2022-21","text_gpt3_token_len":261,"char_repetition_ratio":0.094129555,"word_repetition_ratio":0.0,"special_character_ratio":0.27419356,"punctuation_ratio":0.15228426,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.97195643,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2022-01-23T04:27:35Z\",\"WARC-Record-ID\":\"<urn:uuid:8a5d48c6-2ee5-4b4a-bb6b-f81a822016a7>\",\"Content-Length\":\"150503\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:b3532d7a-c768-4cfe-afae-697a963701fd>\",\"WARC-Concurrent-To\":\"<urn:uuid:ae693f4b-3096-43a8-884a-a98ee396ebdf>\",\"WARC-IP-Address\":\"192.0.78.24\",\"WARC-Target-URI\":\"https://theviralcode.com/2017/08/15/binary-search-python/\",\"WARC-Payload-Digest\":\"sha1:NYH6TCVO4X43JR4YPSDQ5CTM6DKIMM6M\",\"WARC-Block-Digest\":\"sha1:TQTUCVUZYFVDTIUD5MAC3F4BUPHY4G46\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2022/CC-MAIN-2022-05/CC-MAIN-2022-05_segments_1642320303956.14_warc_CC-MAIN-20220123015212-20220123045212-00657.warc.gz\"}"} |
https://www.physicsforums.com/threads/major-trouble-with-a-ball-attached-to-a-string-on-a-pole.847487/ | [
"# Major trouble with a ball attached to a string on a pole...\n\n## Homework Statement\n\nA 0.5 kg mass is attached to a string that is 20 cm tall and anchored to a pole. There is an angle between the string and the pole.\n\n1) What is the force of gravity on the mass in terms of the angle?\n2) If the mass is pulled slightly to an angle of 5 degrees and if sin(theta) is congruent to theta, find an equation and its solution that best fits the case when at time = 0 the mass is held at 5 degrees. (If you are stuck, please consider the following two questions: a) What is the moment of inertia of the mass on the string in terms of mass and string length L? b) What is the expression for the angular acceleration I(omega) in terms of mass and string length L and d(theta)/dt when one notes that d(theta)/dt = omega?)\n3) Will the mass oscillate if the mass is released after being pulled to 5 degrees?\n4) If it oscillates, what is the angular frequency if the mass is 0.2 kg?\n5) If it oscillates, does doubling the mass change the frequency, and if so how?\n6) If it oscillates, does doubling the length of the string change the frequency, and if so how?\n\n## Homework Equations\n\nomega = 2(pi)(frequency)\n\n## The Attempt at a Solution\n\n1) The only one I could really answer. Fsin(theta), which is equal to mgsin(theta).\n2) I don't know. I absolutely don't understand this. My teacher would only give me the answer (900 m) and told me I have to figure out the solution on my own. And I don't get it.\n3) I think it could. It can go into simple harmonic motion, although it is eventually slowed by friction and air resistance. Plus, I don't think my teacher would have asked questions 4-6 if this wasn't yes.\n4) omega\n5)\n6)\n\nI am having an unbelievably hard time with this. This is an intro to physics class, and I can't believe my teacher would seriously give this when she did not go over the subject. I've been self-teaching, and I'm still not sure I got the topic 100%. I seriously need someone to guide me through this. Any and all help is appreciated!\n\nSimon Bridge\nHomework Helper\nNot enough information.\nIs the pole upright and the ball is swinging around the pole or more of a pendulum arrangement with the pole horizontal or what?\nWe should be able to draw a diagram from your description.\n\n1. the force of gravity does not depend on the angle of the string - the net force probably does though.\n2. how can the sine of an angle be \"congruent to\" the angle? You can have two angles that are congruent...\nBut can you answer a and b?\n3. good reasoning.\n\nI suspect some sort of pendulum arrangement - and you have recently done coursework on simple harmonic motion ... so that material should help you figure it out.\n\nNot enough information.\nIs the pole upright and the ball is swinging around the pole or more of a pendulum arrangement with the pole horizontal or what?\nWe should be able to draw a diagram from your description.\n\n1. the force of gravity does not depend on the angle of the string - the net force probably does though.\n2. how can the sine of an angle be \"congruent to\" the angle? You can have two angles that are congruent...\nBut can you answer a and b?\n3. good reasoning.\n\nI suspect some sort of pendulum arrangement - and you have recently done coursework on simple harmonic motion ... so that material should help you figure it out.\n\nHi, thank you for assisting me!\n\nAs for the diagram, the pole, according to my teacher, is upright and the ball is pulled to the right at a certain degree. So it should be swinging left and right in simple harmonic motion. Kind of like in the following picture, minus the measurements.",
null,
"1) I just figured that the ball's acceleration is gravity, so F = mg. Then, because it asked for angle, I just used the one available in the question.\n2) I honestly don't know what my teacher wants in this question. I don't know where to start or even go with this. I don't know how to solve A and B either, although I am familiar with both topics.\n3) thank you\n\nAnd it looks like I left the rest incomplete for some reason! Sorry, I must have not saved it right.\n\n4) I absolutely don't know.\n5) Yes. If the ball is heavier, it will have a lower frequency and a lighter ball a higher frequency.\n6) The length of the string doesn't affect the frequency. It depends more on the angle and the mass of the ball.\n\nharuspex\nHomework Helper\nGold Member\n2020 Award\n1) I just figured that the ball's acceleration is gravity, so F = mg. Then, because it asked for angle, I just used the one available in the question.\nGravity is a force on it, and its magnitude will be mg, but g will not be its acceleration. The acceleration will come from the net force, so takes into account the tension in the string.\nWith regard to q2, I believe it should say sin(theta) approximates theta (because theta is small).\n\nCWatters\nHomework Helper\nGold Member\n1) What is the force of gravity on the mass in terms of the angle?\n\nBrinstar - Can I recommend you check and repost the questions if any are incorrect.\n\nI may be wrong, but I think you should look over 5 and 6 again.\n\nOkay, to clarify all the questions, I scanned the document and took a screenshot of the question. This is the original, and my teacher had everything rephrased in class the way I wrote it. So 2 and 3 were used as subsections to solve for 4 rather than being actual questions.\n\nGravity is a force on it, and its magnitude will be mg, but g will not be its acceleration. The acceleration will come from the net force, so takes into account the tension in the string.\nWith regard to q2, I believe it should say sin(theta) approximates theta (because theta is small).\n\nOh gosh, now I'm confused. I tried asking my teacher for more help, and she said the answer to 1 was mgsin(theta). I am very unsure of myself now.\n\nAnd yeah, it's probably approximates. I thought it meant congruent, so that's my bad >.<\n\nBrinstar - Can I recommend you check and repost the questions if any are incorrect.\n\nI may be wrong, but I think you should look over 5 and 6 again.\n\nOkie doke, I'll check it out again. I wouldn't be surprised if I goofed that up.\n\n#### Attachments\n\nharuspex\nHomework Helper\nGold Member\n2020 Award\nOh gosh, now I'm confused. I tried asking my teacher for more help, and she said the answer to 1 was mgsin(theta). I am very unsure of myself now.\nThe force of gravity is always going to be mg here. Your teacher should have asked for the net force. Can you see how to get her answer with that interpretation?\n(And yes, that equals sign with a tilde above it means is approximately equal to.)\n\nSimon Bridge\nHomework Helper\nI'm with haruspex here. I'd also ask what stops the ball from hitting the pole, but Im cheeky that way. ;)\n\nYou can see haruspex is correct if you draw a free body diagram... gravity mg points down and tension T points off to the right at angle ##\\theta## to the vertical. (This is like those problems you've probably seen where something slides down a slope, only you get tension instead of a normal force.)\n\nYou are going to want something like ##\\tau = I\\alpha## ... take care to distinguish between the oscillator angular frequency and the instantanious angular velocity of the mass.\n\nCWatters"
] | [
null,
"https://www.physicsforums.com/attachments/tetherball2-gif.183489/",
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.9617815,"math_prob":0.7503565,"size":1983,"snap":"2021-43-2021-49","text_gpt3_token_len":499,"char_repetition_ratio":0.11874684,"word_repetition_ratio":0.04232804,"special_character_ratio":0.25718608,"punctuation_ratio":0.091121495,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.98091555,"pos_list":[0,1,2],"im_url_duplicate_count":[null,1,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2021-12-01T05:40:02Z\",\"WARC-Record-ID\":\"<urn:uuid:30e51e64-b455-45ef-98b9-2e1fad7581b0>\",\"Content-Length\":\"106080\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:90dc7f74-6d9f-4f8b-b98d-a012d676ffa1>\",\"WARC-Concurrent-To\":\"<urn:uuid:54912b78-7eac-4802-9ee1-612e1955a362>\",\"WARC-IP-Address\":\"172.67.68.135\",\"WARC-Target-URI\":\"https://www.physicsforums.com/threads/major-trouble-with-a-ball-attached-to-a-string-on-a-pole.847487/\",\"WARC-Payload-Digest\":\"sha1:IQKWURKPEVCGXEPLXDCTZPADT5MMQDTF\",\"WARC-Block-Digest\":\"sha1:EOTCTXYJTTWOKRF7KAZRRYZGRGQFKJPI\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2021/CC-MAIN-2021-49/CC-MAIN-2021-49_segments_1637964359093.97_warc_CC-MAIN-20211201052655-20211201082655-00169.warc.gz\"}"} |
https://dsp.stackexchange.com/questions/2057/period-of-this-signal/2059 | [
"# period of this signal\n\nit could be a donkey question but I'm a little confused.\n\nI have this signal $w(t)=sin({\\pi}0.1f)$. I have to calculate the period of this signal.\n\n$w(t)=sin(2{\\pi}\\frac{1}{20}f)$\n\nthe period of this signal is: $20s$ while the frequency is $\\frac{1}{20}Hz$\n\nis it correct?\n\nYou are mostly correct. The equation should be $w(t) = sin(2\\pi\\frac{1}{20}t)$. The variable in the sin should be $t$, not $f$. The frequency is determined by the $\\frac{1}{20}$, not by the variable.\n\nOther than that you are correct. The period is 20s, which makes it a $\\frac{1}{20}$ Hz sin wave.\n\n• I used $f$ variable because my sin function is domain of frequency and not in time domain – Mazzy Apr 14 '12 at 14:00\n• @Mazzy Okay, but then it would be w(f), not w(t). – Jim Clay Apr 15 '12 at 2:37\n• @Mazzy To add further to Jim Clay's response to your use of $f$, note that $w(f) = \\sin(2\\pi \\frac{1}{20}f)$ is not the Fourier transform of a sinusoidal signal in the time domain. The Fourier transform of a sinusoidal time-domain signal is a pair of impulses in the frequency domain. – Dilip Sarwate Apr 15 '12 at 12:44\n\nIt's very important to write the equation properly. The way your equation is written originally there is no period at all. Your left side function of the variable \"t\". Since t doesn't show in the right side, the right side is a independent of t. Hence it's a constant and therefore the period is infinity.\n\nJim Clay already fixed that in his response. The other potential pitfall are units. If you write the equation as sin(2*pi*(1/20)*t), then t is a unit-less quantity since you cannot take the sin() of a quantity that has units. So the answer would be that the period is 20 (and not 20s). If you write the equation as sin(2*pi*(1/20s)*t), then the t is a time and the units of t cancel with the units in the term (1/20s). In this case the period would be 20s.\n\n• Why infinity and not any value? – Rojo Apr 16 '12 at 1:29\n• @Rojo: What's the frequency of the number 1? It has no frequency; it's not a sine wave. – endolith Apr 16 '12 at 16:06\n• @endolith the concept of period far exceeds sine waves – Rojo Apr 16 '12 at 17:51\n• @Rojo: What's the period of a constant, then? – endolith Apr 16 '12 at 17:52\n• @endolith, formally I am not sure, I was asking. But it would make sense to me that any nonzero value is a possible period. f(t) = f(t+P) for any P if f is a constnat. Periods are not unique. In a sin(2*pi*t), 2 is a period too. Probably the prime period in a constant is undetermined, because there's no minimum period. But I'd say \"infinity\" is the period of signals that never repeat themselves, not constants – Rojo Apr 16 '12 at 18:41"
] | [
null
] | {"ft_lang_label":"__label__en","ft_lang_prob":0.9073879,"math_prob":0.9925847,"size":268,"snap":"2019-51-2020-05","text_gpt3_token_len":90,"char_repetition_ratio":0.13636364,"word_repetition_ratio":0.0,"special_character_ratio":0.3432836,"punctuation_ratio":0.0952381,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9989354,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2019-12-06T23:25:16Z\",\"WARC-Record-ID\":\"<urn:uuid:7bea9e22-83af-42f4-a0ff-91662877ee12>\",\"Content-Length\":\"146553\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:de0bae3e-1550-4771-a4d9-82401531a3b2>\",\"WARC-Concurrent-To\":\"<urn:uuid:069f15cf-39a7-49ae-bd6d-743bb1c32ea8>\",\"WARC-IP-Address\":\"151.101.1.69\",\"WARC-Target-URI\":\"https://dsp.stackexchange.com/questions/2057/period-of-this-signal/2059\",\"WARC-Payload-Digest\":\"sha1:G3DZDHLHQFAKNW77XB5H6IRVVXU4KXIQ\",\"WARC-Block-Digest\":\"sha1:XYA6A4AZXPBH65OQZBKYBDTBQHHWSL42\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2019/CC-MAIN-2019-51/CC-MAIN-2019-51_segments_1575540491491.18_warc_CC-MAIN-20191206222837-20191207010837-00083.warc.gz\"}"} |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.