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# Sentiment Analysis
## Overview
This is an implementation of the Sentiment Analysis model as described in the [this paper](https://arxiv.org/abs/1412.1058). The implementation is with the reference to [paddle version](https://github.com/mlperf/reference/tree/master/sentiment_analysis/paddle).

The model makes use of concatenation of two CNN layers with different kernel sizes. Batch normalization and dropout layers are used to prevent over-fitting.

## Dataset
The [keras](https://keras.io)'s [IMDB Movie reviews sentiment classification](https://keras.io/datasets/#imdb-movie-reviews-sentiment-classification) dataset is used. The dataset file download is handled by keras module, and the downloaded files are stored at ``~/.keras/datasets` directory. The compressed file's filesize as of June 15 2018 is 17MB.

## Running Code
### Train and evaluate model
To train and evaluate the model, issue the following command:
```
python sentiment_main.py
```
Arguments:
  * `--dataset`: The dataset name to be downloaded and preprocessed. By default, it is `imdb`.

There are other arguments about models and training process. Use the `--help` or `-h` flag to get a full list of possible arguments with detailed descriptions.

## Benchmarks
The model was recorded to have the accuracy of 90.1% for the IMDB dataset.