Lei Chen

2026

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Privacy Matters: Data Attack to Make User Preferences Unlearnable in Recommendation.
Pengyang Shao|Le Wu|Kun Zhang|Lei Chen|Meng Wang
ACM Transactions on Information Systems (TOIS) 2026 Volume 44 Issue 4
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BalDRO: A Distributionally Robust Optimization based Framework for Large Language Model Unlearning.
Pengyang Shao|Naixin Zhai|Lei Chen|Yonghui Yang|Fengbin Zhu|Xun Yang|Meng Wang
Proceedings of the ACM Web Conference 2026, WWW 2026, Dubai, United Arab Emirates, originally scheduled for April 13-17, 2026, rescheduled for June 29 - July 3, 2026.

2025

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Enhancing ID-based Recommendation with Large Language Models.
Lei Chen|Chen Gao|Xiaoyi Du|Hengliang Luo|Depeng Jin|Yong Li|Meng Wang
ACM Transactions on Information Systems (TOIS) 2025 Volume 43 Issue 5

2024

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Mitigating Recommendation Biases via Group-Alignment and Global-Uniformity in Representation Learning.
Miaomiao Cai|Min Hou|Lei Chen|Le Wu|Haoyue Bai|Yong Li|Meng Wang
ACM Transactions on Intelligent Systems and Technology (TIST) 2024 Volume 15 Issue 5

2023

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Improving Recommendation Fairness via Data Augmentation.
Lei Chen|Le Wu|Kun Zhang|Richang Hong|Defu Lian|Zhiqiang Zhang|Jun Zhou|Meng Wang
Proceedings of the ACM Web Conference 2023, WWW 2023, Austin, TX, USA, 30 April 2023 - 4 May 2023

2022

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Investigating Accuracy-Novelty Performance for Graph-based Collaborative Filtering.
Minghao Zhao|Liqiang Nie|Yile Liang|Mohammad Akbari|Le Wu|Lei Chen|Yile Liang|Mohammad Akbari|Tao Li|Jian Zhang|Lei Chen|Tao Li|Tat-Seng Chua|Tat-Seng Chua|Jian Zhang|Qilin Deng|Kai Wang|Xudong Shen|Tangjie Lv|Runze Wu
SIGIR '22: The 45th International ACM SIGIR Conference on Research and Development in Information Retrieval, Madrid, Spain, July 11 - 15, 2022

2021

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Set2setRank: Collaborative Set to Set Ranking for Implicit Feedback based Recommendation.
Lei Chen|Le Wu|Kun Zhang|Richang Hong|Meng Wang
SIGIR '21: The 44th International ACM SIGIR Conference on Research and Development in Information Retrieval, Virtual Event, Canada, July 11-15, 2021
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Learning Fair Representations for Recommendation: A Graph-based Perspective.
Le Wu|Lei Chen|Pengyang Shao|Richang Hong|Xiting Wang|Meng Wang
WWW '21: The Web Conference 2021, Virtual Event / Ljubljana, Slovenia, April 19-23, 2021.

2020

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Learning to Transfer Graph Embeddings for Inductive Graph based Recommendation.
Le Wu|Yonghui Yang|Lei Chen|Defu Lian|Richang Hong|Meng Wang
Proceedings of the 43rd International ACM SIGIR conference on research and development in Information Retrieval, SIGIR 2020, Virtual Event, China, July 25-30, 2020