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Evaluating Extrapolation Performance of Dense Retrieval



Jingtao Zhan , Xiaohui Xie , Jiaxin Mao , Yiqun Liu , Min Zhang , Shaoping Ma


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Interacting with Non-Cooperative User: A New Paradigm for Proactive Dialogue Policy



Wenqiang Lei , Yao Zhang , Feifan Song , Hongru Liang , Jiaxin Mao , Jiancheng Lv , Zhenglu Yang , Tat-Seng Chua

* Accepted to SIGIR 2022 

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KuaiRec: A Fully-observed Dataset for Recommender Systems



Chongming Gao , Shijun Li , Wenqiang Lei , Biao Li , Peng Jiang , Jiawei Chen , Xiangnan He , Jiaxin Mao , Tat-Seng Chua

* 11 pages, 7 figures 

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Interpreting Dense Retrieval as Mixture of Topics



Jingtao Zhan , Jiaxin Mao , Yiqun Liu , Jiafeng Guo , Min Zhang , Shaoping Ma


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Learning Discrete Representations via Constrained Clustering for Effective and Efficient Dense Retrieval



Jingtao Zhan , Jiaxin Mao , Yiqun Liu , Jiafeng Guo , Min Zhang , Shaoping Ma

* WSDM 2022 

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POSSCORE: A Simple Yet Effective Evaluation of Conversational Search with Part of Speech Labelling



Zeyang Liu , Ke Zhou , Jiaxin Mao , Max L. Wilson

* 11 pages 

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Jointly Optimizing Query Encoder and Product Quantization to Improve Retrieval Performance



Jingtao Zhan , Jiaxin Mao , Yiqun Liu , Jiafeng Guo , Min Zhang , Shaoping Ma

* Accepted by CIKM 2021 as a full paper 

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Optimizing Dense Retrieval Model Training with Hard Negatives



Jingtao Zhan , Jiaxin Mao , Yiqun Liu , Jiafeng Guo , Min Zhang , Shaoping Ma

* To be published in SIGIR2021 

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THU[email protected]: Leveraging Semantic Understanding and Exact Matching for Legal Case Retrieval and Entailment



Yunqiu Shao , Bulou Liu , Jiaxin Mao , Yiqun Liu , Min Zhang , Shaoping Ma


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