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Improving Document Classification with Multi-Sense Embeddings

Introduction

  • For text classification and information retrieval tasks, text data has to be represented as a fixed dimension vector.
  • We propose important modification to the simple feature construction technique named Sparse Composite Document Vector (SCDV)
  • Our proposed technique improve SCDV by ultizing multi-sense word embedding. For details about the modifications, see our ECAI paper: Improving Document Classification with Multi-Sense Embeddings
  • We demonstrate our method through experiments on multi-class classification on 20newsgroup dataset and multi-label text classification on Reuters-21578 dataset.

Testing

There are 2 folders named 20news and Reuters which contains code related to multi-class classification on 20Newsgroup dataset and multi-label classification on Reuters dataset.

20Newsgroup

Change directory to 20NewsGroup for experimenting on 20Newsgroup dataset and all train and test data files (both annotated and non-annoated with adagram-julia are there) as follows:

$ cd 20NewsGroup

Get word vectors (with Doc2VecC on polysemous corpus) for all words in vocabulary (you can also create other word embedding by following local readme):

$ cd Word_Vectors
$ cd doc2vecC
$ sh go_polysemy_20news_polysemy.sh 
$ cd ../
# Word2Vec.py takes word vector dimension as an argument. you can input a dimension of 200.

Get word topic vectors for all the word vectors and sparse GMM (read local readMe for more details):

$ cd Word_Topic_Vectors
$ python3 create_wtv.py 200 60 doc2vecc 0.3
$ cd ../
# create_wtv.py takes word vector dimension, number of clusters as arguments, type of embeddings and sparsity threshold. We took word vector dim 200, 60 as number of clusters, doc2vecc train word-vectors and sparsity threshold of 0.3

Get Sparse Document Vectors (SCDV) for documents in train and test set and accuracy of prediction on test set (read local readMe for more details):

$ cd SVM_classifier
$ python SVM.py 200 60
$ cd ../
# SCDV.py takes word vector dimension and number of clusters as arguments. We took word vector dimension as 200 and number of clusters as 60.

Reuters

Change directory to Reuters for experimenting on Reuters-21578 dataset. Similar to 20newsgroup folder, read local readMe for more details.

Requirements

Minimum requirements:

  • Python 2.7+
  • NumPy 1.8+
  • Scikit-learn
  • Pandas
  • Gensim

References

[1] Mekala, Dheeraj, Vivek Gupta, Bhargavi Paranjape, and Harish Karnick. "SCDV: Sparse Composite Document Vectors using soft clustering over distributional representations." In Proceedings of the 2017 Conference on Empirical Methods in Natural Language Processing, pp. 659-669. 2017

Recommended Citations

@inproceedings{gupta2020multisense,
  title={Improving Document Classification with Multi-Sense Embeddings},
  author={Gupta, Vivek and Saw, Ankit and Nokhiz, Pegah and Gupta, Harshit and Talukdar, Partha},
  booktitle={Proceedings of the European Conference on Artificial Intelligence},
  year={2020}
}
@inproceedings{mekala2017scdv,
  title={SCDV: Sparse Composite Document Vectors using soft clustering over distributional representations},
  author={Mekala, Dheeraj and Gupta, Vivek and Paranjape, Bhargavi and Karnick, Harish},
  booktitle={Proceedings of the 2017 Conference on Empirical Methods in Natural Language Processing},
  pages={659--669},
  year={2017}
}

Note: You need not download the orignal 20Newsgroup or Reuters-21578 dataset. The annotated datasets using AgaGram is also available in data directory. All other datasets are also present in their respective directories. We used SGMl parser for parsing Reuters-21578 dataset from here