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Pre-train a Discriminative Text Encoder for Dense Retrieval via Contrastive Span Prediction



Xinyu Ma , Jiafeng Guo , Ruqing Zhang , Yixing Fan , Xueqi Cheng

* Accepted to SIGIR 2022 

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GERE: Generative Evidence Retrieval for Fact Verification



Jiangui Chen , Ruqing Zhang , Jiafeng Guo , Yixing Fan , Xueqi Cheng

* Accepted by SIGIR 2022 

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PRADA: Practical Black-Box Adversarial Attacks against Neural Ranking Models



Chen Wu , Ruqing Zhang , Jiafeng Guo , Maarten de Rijke , Yixing Fan , Xueqi Cheng


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Complex Evolutional Pattern Learning for Temporal Knowledge Graph Reasoning



Zixuan Li , Saiping Guan , Xiaolong Jin , Weihua Peng , Yajuan Lyu , Yong Zhu , Long Bai , Wei Li , Jiafeng Guo , Xueqi Cheng

* ACL 2022 main conference 

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What is Event Knowledge Graph: A Survey



Saiping Guan , Xueqi Cheng , Long Bai , Fujun Zhang , Zixuan Li , Yutao Zeng , Xiaolong Jin , Jiafeng Guo


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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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Pre-training Methods in Information Retrieval



Yixing Fan , Xiaohui Xie , Yinqiong Cai , Jia Chen , Xinyu Ma , Xiangsheng Li , Ruqing Zhang , Jiafeng Guo , Yiqun Liu


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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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