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Shijing Si

7 accepted papers

2024

Leveraging BERT and TFIDF Features for Short Text Clustering via Alignment-Promoting Co-Training

EMNLP 2024main

BERT and TFIDF features excel in capturing rich semantics and important words, respectively. Since most existing clustering methods are solely based on the BERT model, they often fall short in utilizing keyword information, which, however, is very useful in clustering short texts. In this paper, we…

2023

On the Calibration and Uncertainty with Pólya-Gamma Augmentation for Dialog Retrieval Models

AAAI 2023technical

Deep neural retrieval models have amply demonstrated their power but estimating the reliability of their predictions remains challenging. Most dialog response retrieval models output a single score for a response on how relevant it is to a given question. However, the bad calibration of deep neural…

2022

Efficient Document Retrieval by End-to-End Refining and Quantizing BERT Embedding with Contrastive Product Quantization

EMNLP 2022main

Efficient document retrieval heavily relies on the technique of semantic hashing, which learns a binary code for every document and employs Hamming distance to evaluate document distances. However, existing semantic hashing methods are mostly established on outdated TFIDF features, which obviously d…

2021

FairFil: Contrastive Neural Debiasing Method for Pretrained Text Encoders

ICLR 2021poster

Pretrained text encoders, such as BERT, have been applied increasingly in various natural language processing (NLP) tasks, and have recently demonstrated significant performance gains. However, recent studies have demonstrated the existence of social bias in these pretrained NLP models. Although pri…

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