State of the art Semantic Sentence Embeddings

Last update: Dec 30, 2022

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Deep Learning Contrastive-Tension

Overview

Contrastive Tension

State of the art Semantic Sentence Embeddings

Published Paper · Huggingface Models · Report Bug

Overview

This is the official code accompanied with the paper Semantic Re-Tuning via Contrastive Tension.
The paper was accepted at ICLR-2021 and official reviews and responses can be found at OpenReview.

Contrastive Tension(CT) is a fully self-supervised algorithm for re-tuning already pre-trained transformer Language Models, and achieves State-Of-The-Art(SOTA) sentence embeddings for Semantic Textual Similarity(STS). All that is required is hence a pre-trained model and a modestly large text corpus. The results presented in the paper sampled text data from Wikipedia.

This repository contains:

Tensorflow 2 implementation of the CT algorithm
State of the art pre-trained STS models
Tensorflow 2 inference code
PyTorch inference code

Requirements

While it is possible that other versions works equally fine, we have worked with the following:

Python = 3.6.9
Transformers = 4.1.1

Usage

All the models and tokenizers are available via the Huggingface interface, and can be loaded for both Tensorflow and PyTorch:

import transformers

tokenizer = transformers.AutoTokenizer.from_pretrained('Contrastive-Tension/RoBerta-Large-CT-STSb')

TF_model = transformers.TFAutoModel.from_pretrained('Contrastive-Tension/RoBerta-Large-CT-STSb')
PT_model = transformers.AutoModel.from_pretrained('Contrastive-Tension/RoBerta-Large-CT-STSb')

Inference

To perform inference with the pre-trained models (or other Huggigface models) please see the script ExampleBatchInference.py.
The most important thing to remember when running inference is to apply the attention_masks on the batch output vector before mean pooling, as is done in the example script.

CT Training

To run CT on your own models and text data see ExampleTraining.py for a comprehensive example. This file currently creates a dummy corpus of random text. Simply replace this to whatever corpus you like.

Pre-trained Models

Note that these models are not trained with the exact hyperparameters as those disclosed in the original CT paper. Rather, the parameters are from a short follow-up paper currently under review, which once again pushes the SOTA.

All evaluation is done using the SentEval framework, and shows the: (Pearson / Spearman) correlations

Unsupervised / Zero-Shot

As both the training of BERT, and CT itself is fully self-supervised, the models only tuned with CT require no labeled data whatsoever.
The NLI models however, are first fine-tuned towards a natural language inference task, which requires labeled data.

Model	Avg Unsupervised STS	STS-b	#Parameters
Fully Unsupervised
BERT-Distil-CT	75.12 / 75.04	78.63 / 77.91	66 M
BERT-Base-CT	73.55 / 73.36	75.49 / 73.31	108 M
BERT-Large-CT	77.12 / 76.93	80.75 / 79.82	334 M
Using NLI Data
BERT-Distil-NLI-CT	76.65 / 76.63	79.74 / 81.01	66 M
BERT-Base-NLI-CT	76.05 / 76.28	79.98 / 81.47	108 M
BERT-Large-NLI-CT	77.42 / 77.41	80.92 / 81.66	334 M

Supervised

These models are fine-tuned directly with STS data, using a modified version of the supervised training object proposed by S-BERT.
To our knowledge our RoBerta-Large-STSb is the current SOTA model for STS via sentence embeddings.

Model	STS-b	#Parameters
BERT-Distil-CT-STSb	84.85 / 85.46	66 M
BERT-Base-CT-STSb	85.31 / 85.76	108 M
BERT-Large-CT-STSb	85.86 / 86.47	334 M
RoBerta-Large-CT-STSb	87.56 / 88.42	334 M

Other Languages

Model	Language	#Parameters
BERT-Base-Swe-CT-STSb	Swedish	108 M

License

Distributed under the MIT License. See LICENSE for more information.

Contact

If you have questions regarding the paper, please consider creating a comment via the official OpenReview submission.
If you have questions regarding the code or otherwise related to this Github page, please open an issue.

For other purposes, feel free to contact me directly at: [email protected]

Acknowledgements

Comments

AttributeError: module 'ContrastiveTension.Inference' has no attribute 'generateSentenceEmbeddings'

Hi, thank you for open-sourcing your work! I found this error when executing ExampleTraining.py There is no function generateSentenceEmbeddings under Inference.py. Could you please update this? Thank you! File "/content/gdrive/MyDrive/Contrastive-Tension-master/STSData/Evaluation.py", line 36, in evaluateSTS embs = Inference.generateSentenceEmbeddings(model, tokenizer, batchTexts) AttributeError: module 'ContrastiveTension.Inference' has no attribute 'generateSentenceEmbeddings'

opened by mmmargarettttt 0
ContrastiveTension

Hi Everyone.

It's probably just me, but I keep getting the message: "ModuleNotFoundError: No module named 'ContrastiveTension'." I was trying to run the "ExampleBatchInference.py" script. Can someone please explain why?

Thank you so much in advance. I wish you all a great day! Angelina.

opened by angelinachu 0
TypeError: () missing 1 required positional argument: 'b'
Hi, I read your work and found that it very interested and I'm trying to reproduce this work by following the example that you posted. However, when the example is running to evalFunc the error happened

87 if (evalFunc != None): ---> 88 eval_1 = evalFunc(model.model1, tokenizer) 89 print("Evaluation Scores Model-1:", eval_1) 90 eval_2 = evalFunc(model.model2, tokenizer) TypeError: <lambda>() missing 1 required positional argument: 'b'

I use the setting and model that you provided in this.

Thank you for the answer.
opened by mrpeerat 1
Model is only saved when an evalFunc is passed

First of all, thank you for open-sourcing the training scripts. This looks very promising for semantic search and I'm currently evaluating some use-cases.

Something I noticed while playing around with it:

If no evalFunc is passed, we never make it to the branch of the code that calls .save_pretrained().

opened by etiennedi 0

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State of the art Semantic Sentence Embeddings

Related tags

Overview

Contrastive Tension

State of the art Semantic Sentence Embeddings

Overview

Requirements

Usage

Inference

CT Training

Pre-trained Models

Unsupervised / Zero-Shot

Supervised

Other Languages

License

Contact

Acknowledgements

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Comments

AttributeError: module 'ContrastiveTension.Inference' has no attribute 'generateSentenceEmbeddings'

ContrastiveTension

TypeError: () missing 1 required positional argument: 'b'

Model is only saved when an evalFunc is passed

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