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https://github.com/tlatkowski/multihead-siamese-nets
Implementation of Siamese Neural Networks built upon multihead attention mechanism for text semantic similarity task.
https://github.com/tlatkowski/multihead-siamese-nets
attention deep-architectures deep-learning deep-neural-networks multihead-attention multihead-attention-networks natural-language-processing nlp paraphrase paraphrase-identification python3 quora-question-pairs semantic-similarity sentence-similarity siamese-cnn siamese-lstm siamese-neural-network snli tensorflow text-similarity
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Implementation of Siamese Neural Networks built upon multihead attention mechanism for text semantic similarity task.
- Host: GitHub
- URL: https://github.com/tlatkowski/multihead-siamese-nets
- Owner: tlatkowski
- License: mit
- Created: 2018-01-03T20:25:46.000Z (over 6 years ago)
- Default Branch: master
- Last Pushed: 2023-03-24T23:45:44.000Z (over 1 year ago)
- Last Synced: 2024-05-01T15:22:00.133Z (about 2 months ago)
- Topics: attention, deep-architectures, deep-learning, deep-neural-networks, multihead-attention, multihead-attention-networks, natural-language-processing, nlp, paraphrase, paraphrase-identification, python3, quora-question-pairs, semantic-similarity, sentence-similarity, siamese-cnn, siamese-lstm, siamese-neural-network, snli, tensorflow, text-similarity
- Language: Jupyter Notebook
- Homepage:
- Size: 1.43 MB
- Stars: 182
- Watchers: 9
- Forks: 43
- Open Issues: 12
-
Metadata Files:
- Readme: README.md
- Funding: .github/FUNDING.yml
- License: LICENSE
Lists
- awesome-document-similarity - Siamese Neural Networks built upon multihead attention mechanism for text semantic similarity task
README
[](https://opencollective.com/multihead-siamese-nets)   
# Siamese Deep Neural Networks for semantic similarity.
This repository contains an implementation of Siamese Neural Networks in Tensorflow built based on 3 different and major deep learning architectures:
- Convolutional Neural Networks
- Recurrent Neural Networks
- Multihead Attention Networks
The main reason of creating this repository is to compare well-known implementaions of Siamese Neural Networks available on GitHub mainly built upon CNN and RNN architectures with Siamese Neural Network built based on the multihead attention mechanism originally proposed in the Transformer model from [Attention is all you need](https://papers.nips.cc/paper/7181-attention-is-all-you-need.pdf) paper.
# Supported datasets
Current version of pipeline supports the following **3** datasets:
- [The Stanford Natural Language Inference (SNLI) Corpus](https://nlp.stanford.edu/projects/snli/)
- [Quora Question Pairs](https://www.kaggle.com/c/quora-question-pairs)
- :new: Adversarial Natural Language Inference (ANLI) benchmark: [GitHub](https://github.com/facebookresearch/anli/), [arXiv](https://arxiv.org/pdf/1910.14599.pdf)
# Installation
### Data preparation
In order to download data, execute the following commands
(this process can take a while depending on your network throughput):
```
cd bin
chmod a+x prepare_data.sh
./prepare_data.sh
```
As as result of executing above script, **corpora** directory
will be created with **QQP**, **SNLI** and **ANLI** data.
### Dependency installation
This project was developed in and has been tested using **Python 3.6**. The package requirements are stored in the **requirements** folder.
To install the requirements, execute the following command:
For **GPU** usage, execute:
```
pip install -r requirements/requirements-gpu.txt
```
and for **CPU** usage:
```
pip install -r requirements/requirements-cpu.txt
```
# Training models
To train a model run the following command:
```
python3 run.py train SELECTED_MODEL SELECTED_DATASET --experiment_name NAME --gpu GPU_NUMBER
```
where **SELECTED_MODEL** represents one of the selected models among:
- cnn
- rnn
- multihead
and **SELECTED_DATASET** is represented by:
- SNLI
- QQP
- ANLI
**--experiment_name** is an optional argument used for indicating an experiment name. Default value **{SELECTED_MODEL}_{EMBEDDING_SIZE}**.
**--gpu** is an optional argument, use it in order to indicate specific GPU on your machine (the default value is '0').
Example (GPU usage):
Run the following command to train Siamese Neural Network based on CNN and trained on the SNLI corpus:
```
python3 run.py train cnn SNLI --gpu 1
```
Example (CPU usage):
Run the following command to train Siamese Neural Network based on CNN:
```
python3 run.py train cnn SNLI
```
## Training configuration
This repository contains main configuration training file placed in **'config/main.ini'**.
```ini
[TRAINING]
num_epochs = 10
batch_size = 512
eval_every = 20
learning_rate = 0.001
checkpoints_to_keep = 5
save_every = 100
log_device_placement = false
[DATA]
logs_path = logs
model_dir = model_dir
[PARAMS]
embedding_size = 64
loss_function = mse
```
## Model configuration
Additionally each model contains its own specific configuration file in which changing hyperparameters is possible.
### Multihead Attention Network configuration file
```ini
[PARAMS]
num_blocks = 2
num_heads = 8
use_residual = False
dropout_rate = 0.0
```
### Convolutional Neural Network configuration file
```ini
[PARAMS]
num_filters = 50,50,50
filter_sizes = 2,3,4
dropout_rate = 0.0
```
### Recurrent Neural Network configuration file
```ini
[PARAMS]
hidden_size = 128
cell_type = GRU
bidirectional = True
```
## Training models with GPU support on Google Colaboratory
If you don't have a workstation with GPU, you can use the below exemplary Google Colaboratory
notebook for training your models (CNN, RNN or Multihead) on SNLI or QQP datasets with usage of **NVIDIA Tesla T4 16GB GPU**
available within Google Colaboratory backend: [Multihead Siamese Nets in Google Colab](https://colab.research.google.com/drive/1FUEBV1JkQpF2iwFSDW338nAUhzPVZWAa)
# Testing models
Download pretrained models from the following link: [pretrained Siamese Nets models](https://drive.google.com/file/d/1STgv1hIxdVpKLQ6-EZK7J3C4ZtfZgbkS/view?usp=sharing), unzip and put them
in the **./model_dir** directory. After that, you can test models either using the predict mode of pipeline:
```bash
python3 run.py predict cnn
```
or using GUI demo:
```bash
python3 gui_demo.py
```
The below pictures presents Multihead Siamese Nets GUI for:
1. Positive example:
2. Negative example:
# Attention weights visualization
In order to visualize multihead attention weights for compared sentences use GUI demo - check
'Visualize attention weights' checkbox which is visible after choosing model based on multihead attention mechanism.
The example of attention weights visualization looks as follows (4 attention heads):
# Comparison of models
Experiments performed on GPU **Nvidia GeForce GTX 1080Ti**.
## > SNLI dataset.
Experiment parameters:
```ini
Number of epochs : 10
Batch size : 512
Learning rate : 0.001
Number of training instances : 326959
Number of dev instances : 3674
Number of test instances : 36736
Embedding size : 64
Loss function: mean squared error (MSE)
```
Specific hyperparameters of models:
CNN | RNN | Multihead
------------ | ------------- | -------------
num_filters = 50,50,50 | hidden_size = 128 | num_blocks = 2
filter_sizes = 2,3,4 | cell_type = GRU | num_heads = 8
| | bidirectional = True | use_residual = False
| | | layers_normalization = False
Evaluation results:
Model | Mean-Dev-Acc* | Last-Dev-Acc** | Test-Acc | Epoch Time
------------ | ------------ | ------------- | ------------- | -------------
CNN | 76.51 | 75.08 | 75.40 | 15.97s
bi-RNN | 79.36 | 79.52 | 79.56 | 1 min 22.95s
Multihead | 78.52 | 79.61 | 78.29 | 1 min 00.24s
*Mean-Dev-Acc: the mean development set accuaracy over all epochs.
**Last-Dev-Acc: the development set accuaracy for the last epoch.
Training curves (Accuracy & Loss):
![SNLI][results_snli]
[results_snli]: https://github.com/tlatkowski/multihead-siamese-nets/blob/master/pics/snli_train_curves.png "Evaluation results"
## > QQP dataset.
Experiment parameters:
```ini
Number of epochs : 10
Batch size : 512
Learning rate : 0.001
Number of training instances : 362646
Number of dev instances : 1213
Number of test instances : 40428
Embedding size : 64
Loss function: mean squared error (MSE)
```
Specific hyperparameters of models:
CNN | RNN | Multihead
------------ | ------------- | -------------
num_filters = 50,50,50 | hidden_size = 128 | num_blocks = 2
filter_sizes = 2,3,4 | cell_type = GRU | num_heads = 8
| | bidirectional = True | use_residual = False
| | | layers_normalization = False
Evaluation results:
Model | Mean-Dev-Acc* | Last-Dev-Acc** | Test-Acc | Epoch Time
------------ | ------------ | ------------- | ------------- | -------------
CNN | 79.74 | 80.83 | 80.90 | 49.84s
bi-RNN | 82.68 | 83.66 | 83.30 | 4 min 26.91s
Multihead | 80.75 | 81.74 | 80.99 | 4 min 58.58s
*Mean-Dev-Acc: the mean development set accuracy over all epochs.
**Last-Dev-Acc: the development set accuracy for the last epoch.
Training curves (Accuracy & Loss):
![QQP][qqp_results]
[qqp_results]: https://github.com/tlatkowski/multihead-siamese-nets/blob/master/pics/qqp_train_curves.png "Evaluation results"
## Contributors
### Code Contributors
This project exists thanks to all the people who contribute. [[Contribute](CONTRIBUTING.md)].
### Financial Contributors
Become a financial contributor and help us sustain our community. [[Contribute](https://opencollective.com/multihead-siamese-nets/contribute)]
#### Individuals
#### Organizations
Support this project with your organization. Your logo will show up here with a link to your website. [[Contribute](https://opencollective.com/multihead-siamese-nets/contribute)]
