README.md

---
license: mit
base_model: bert-base-cased
tags:
- CENIA
- News
metrics:
- accuracy
model-index:
- name: bert-base-cased-finetuned
  results: []
datasets:
- cmunhozc/usa_news_en
language:
- en
pipeline_tag: text-classification

widget:
  - text: "Poll: Which COVID-related closure in San Francisco has you the most shook up? || President Trump has pardoned Edward DeBartolo Jr., the former San Francisco 49ers owner convicted in a gambling fraud scandal."
    output:
      - label: RELATED
        score: 0
      - label: UNRELATED
        score: 1     
  - text: "The first batch of 2020 census data surprised many. A look at what's next || There were some genuine surprises in the first batch of data from the nation’s 2020 head count released this week by the U.S. Census Bureau."
    output:
      - label: RELATED
        score: 1
      - label: UNRELATED
        score: 0     
---

<!-- This model card has been generated automatically according to the information the Trainer had access to. You
should probably proofread and complete it, then remove this comment. -->

# bert-base-cased-finetuned

This model is a fine-tuned version of [bert-base-cased](https://huggingface.co/bert-base-cased) on the https://huggingface.co/datasets/cmunhozc/usa_news_en train dataset.
It achieves the following results on the evaluation set:
- Loss: 0.0900
- Accuracy: 0.9800

## Model description
 
The fine-tuned model corresponds to a binary classification model that determines whether two English news headlines are related or not related. In the following paper *{News Gathering: Leveraging Transformers to
Rank News}* it can find more details. To utilize the fine-tuned model, you can follow the steps outlined below:

``` 
from transformers import AutoModelForSequenceClassification, AutoTokenizer
from transformers import Trainer

### 1. Load the model:
model_name = "cmunhozc/news-ft-bert-cased"
model = AutoModelForSequenceClassification.from_pretrained(model_name)
tokenizer = AutoTokenizer.from_pretrained(model_name)

### 2. Dataset:
...
encoded_dataset = dataset.map(preprocess_fctn, batched=True, load_from_cache_file=False)
...

### 3. Evaluation:
def compute_metrics(eval_pred):
  predictions, labels = eval_pred
  predictions = np.argmax(predictions, axis=1)

trainer_hf = Trainer(model,
                     eval_dataset    = encoded_dataset['validation'],
                     tokenizer       = tokenizer,
                     compute_metrics = compute_metrics)

trainer_hf.evaluate()

predictions = trainer_hf.predict(encoded_dataset["validation"])
acc_val  = metric.compute(predictions=np.argmax(predictions.predictions,axis=1).tolist(), references=predictions.label_ids)['accuracy']
```
Finally, with the classification above model, you can follow the steps below to generate the news ranking.
- For each news article in the https://huggingface.co/datasets/cmunhozc/google_news_en dataset positioned as the first element in a pair, retrieve all corresponding pairs from the dataset.
- Employing pair encoders, rank the news articles that occupy the second position in each pair, determining their relevance to the first article.
- Organize each list generated by the encoders based on the probabilities obtained for the relevance class.

## Intended uses & limitations

More information needed

## Training, evaluation and test data

The training data is sourced from the *train* split in https://huggingface.co/datasets/cmunhozc/usa_news_en, and a similar procedure is applied for the *validation* set. In the case of testing, the initial segment for the text classification model is derived from the *test_1* and *test_2* splits. As for the ranking model, the test dataset from https://huggingface.co/datasets/cmunhozc/google_news_en is utilized

## Training procedure

### Training hyperparameters

The following hyperparameters were used during training:
- learning_rate: 1e-05
- train_batch_size: 32
- eval_batch_size: 32
- seed: 42
- optimizer: Adam with betas=(0.9,0.999) and epsilon=1e-08
- lr_scheduler_type: linear
- num_epochs: 3

### Training results

| Training Loss | Epoch | Step  | Validation Loss | Accuracy |
|:-------------:|:-----:|:-----:|:---------------:|:--------:|
| 0.0967        | 1.0   | 3526  | 0.0651          | 0.9771   |
| 0.0439        | 2.0   | 7052  | 0.0820          | 0.9776   |
| 0.0231        | 3.0   | 10578 | 0.0900          | 0.9800   |


### Framework versions

- Transformers 4.35.2
- Pytorch 2.1.0+cu121
- Datasets 2.16.1
- Tokenizers 0.15.0