Li Shang

2026

RECOSIM: A Universal, Accurate, and Scalable Simulation Framework for Online Community Recommendations.

Guangping Zhang|Dongsheng Li|Hansu Gu|Peng Zhang|Tun Lu|Li Shang|Ning Gu

ACM Transactions on Information Systems (TOIS) 2026 Volume 44 Issue 1

LLM Agent-based Shilling Attack on Recommender Systems.

Shengkang Gu|Jiahao Liu|Dongsheng Li|Guangping Zhang|Mingzhe Han|Hansu Gu|Peng Zhang|Ning Gu|Li Shang|Tun Lu

Proceedings of the Nineteenth ACM International Conference on Web Search and Data Mining, WSDM 2026, Boise, ID, USA, February 22-26, 2026

2025

Unbiased Collaborative Filtering with Fair Sampling.

Jiahao Liu|Dongsheng Li|Hansu Gu|Peng Zhang|Tun Lu|Li Shang|Ning Gu

Proceedings of the 48th International ACM SIGIR Conference on Research and Development in Information Retrieval, SIGIR 2025, Padua, Italy, July 13-18, 2025

AgentCF++: Memory-enhanced LLM-based Agents for Popularity-aware Cross-domain Recommendations.

Jiahao Liu|Shengkang Gu|Dongsheng Li|Guangping Zhang|Mingzhe Han|Hansu Gu|Peng Zhang|Tun Lu|Li Shang|Ning Gu

Proceedings of the 48th International ACM SIGIR Conference on Research and Development in Information Retrieval, SIGIR 2025, Padua, Italy, July 13-18, 2025

Improving LLM-powered Recommendations with Personalized Information.

Jiahao Liu|Xueshuo Yan|Dongsheng Li|Guangping Zhang|Hansu Gu|Peng Zhang|Tun Lu|Li Shang|Ning Gu

Proceedings of the 48th International ACM SIGIR Conference on Research and Development in Information Retrieval, SIGIR 2025, Padua, Italy, July 13-18, 2025

Oracle-guided Dynamic User Preference Modeling for Sequential Recommendation.

Jiafeng Xia|Dongsheng Li|Hansu Gu|Tun Lu|Peng Zhang|Li Shang|Ning Gu

Proceedings of the Eighteenth ACM International Conference on Web Search and Data Mining, WSDM 2025, Hannover, Germany, March 10-14, 2025

Frequency-aware Graph Signal Processing for Collaborative Filtering.

Jiafeng Xia|Dongsheng Li|Hansu Gu|Tun Lu|Peng Zhang|Li Shang|Ning Gu

Companion Proceedings of the ACM on Web Conference 2025, WWW 2025, Sydney, NSW, Australia, 28 April 2025 - 2 May 2025

2024

Neural Kalman Filtering for Robust Temporal Recommendation.

Jiafeng Xia|Dongsheng Li|Hansu Gu|Tun Lu|Peng Zhang|Li Shang|Ning Gu

Proceedings of the 17th ACM International Conference on Web Search and Data Mining, WSDM 2024, Merida, Mexico, March 4-8, 2024

Hierarchical Graph Signal Processing for Collaborative Filtering.

Jiafeng Xia|Dongsheng Li|Hansu Gu|Tun Lu|Peng Zhang|Li Shang|Ning Gu

Proceedings of the ACM on Web Conference 2024, WWW 2024, Singapore, May 13-17, 2024

2023

Triple Structural Information Modelling for Accurate, Explainable and Interactive Recommendation.

Jiahao Liu|Dongsheng Li|Hansu Gu|Tun Lu|Peng Zhang|Li Shang|Ning Gu

Proceedings of the 46th International ACM SIGIR Conference on Research and Development in Information Retrieval, SIGIR 2023, Taipei, Taiwan, July 23-27, 2023

Personalized Graph Signal Processing for Collaborative Filtering.

Jiahao Liu|Dongsheng Li|Hansu Gu|Tun Lu|Peng Zhang|Li Shang|Ning Gu

Proceedings of the ACM Web Conference 2023, WWW 2023, Austin, TX, USA, 30 April 2023 - 4 May 2023

2018

AdaError: An Adaptive Learning Rate Method for Matrix Approximation-based Collaborative Filtering.

Dongsheng Li|Chao Chen|Qin Lv|Hansu Gu|Tun Lu|Li Shang|Ning Gu|Stephen M. Chu

Proceedings of the 2018 World Wide Web Conference on World Wide Web, WWW 2018, Lyon, France, April 23-27, 2018

2015

WEMAREC: Accurate and Scalable Recommendation through Weighted and Ensemble Matrix Approximation.

Chao Chen|Dongsheng Li|Yingying Zhao|Qin Lv|Li Shang

Proceedings of the 38th International ACM SIGIR Conference on Research and Development in Information Retrieval, Santiago, Chile, August 9-13, 2015