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How graph convolutions amplify popularity bias for recommendation?
Graph convolutional networks (GCNs) have become prevalent in recommender system (RS) due to their superiority in modeling collaborative …
JiajiaChen
,
JiancanWu
,
Jiawei Chen
,
XinXin
,
YongLi
,
XiangnanHe
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DOI
ReCRec: Reasoning the Causes of Implicit Feedback for Debiased Recommendation
Implicit feedback (e.g., user clicks) is widely used in building recommender systems (RS). However, the inherent notorious exposure …
Siyi Lin
,
ShengZhou
,
Jiawei Chen
,
Yan Feng
,
Qihao Shi
,
Chun Chen
,
YingLi
,
Can Wang
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DOI
Understanding Contrastive Learning via Distributionally Robust Optimization
This study reveals the inherent tolerance of contrastive learning (CL) towards sampling bias, wherein negative samples may encompass …
Junkang Wu
,
Jiawei Chen
,
Jiancan Wu
,
Wentao Shi
,
Xiang Wang
,
Xiangnan He
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