Changhua Pei

2026

Smart Eye: LLM-Guided Proposer-Verifier Framework for Industrial-Scale Log Anomaly Detection.

Changhua Pei|Hang Cui|Jingjing Li|Yuxuan Li|Zihan Liu|Xinyuan Liao|Cenjie Hu|Jiabao Wang|Zheyuan Li|Zexin Wang|Haotian Si|Ke Xiang|Gaogang Xie|Dan Pei

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.

ViTs: Teaching Machines to See Time Series Anomalies Like Human Experts.

Zexin Wang|Changhua Pei|Yang Liu|Hengyue Jiang|Quan Zhou|Haotian Si|Hang Cui|Jianhui Li|Gaogang Xie|Jingjing Li|Dan Pei

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

Flow-of-Action: SOP Enhanced LLM-Based Multi-Agent System for Root Cause Analysis.

Changhua Pei|Zexin Wang|Fengrui Liu|Zeyan Li|Yang Liu|Xiao He|Rong Kang|Tieying Zhang|Jianjun Chen|Jianhui Li|Gaogang Xie|Dan Pei

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

2024

Revisiting VAE for Unsupervised Time Series Anomaly Detection: A Frequency Perspective.

Zexin Wang|Changhua Pei|Minghua Ma|Xin Wang|Zhihan Li|Dan Pei|Saravan Rajmohan|Dongmei Zhang|Qingwei Lin|Haiming Zhang|Jianhui Li|Gaogang Xie

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

2023

CMDiagnostor: An Ambiguity-Aware Root Cause Localization Approach Based on Call Metric Data.

Qingyang Yu|Changhua Pei|Bowen Hao|Mingjie Li|Zeyan Li|Shenglin Zhang|Xianglin Lu|Rui Wang|Jiaqi Li|Zhenyu Wu|Dan Pei

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

2021

Towards Long-term Fairness in Recommendation.

Yingqiang Ge|Shuchang Liu|Ruoyuan Gao|Yikun Xian|Yunqi Li|Xiangyu Zhao|Changhua Pei|Fei Sun|Junfeng Ge|Wenwu Ou|Yongfeng Zhang

WSDM '21, The Fourteenth ACM International Conference on Web Search and Data Mining, Virtual Event, Israel, March 8-12, 2021

Variation Control and Evaluation for Generative Slate Recommendations.

Shuchang Liu|Fei Sun|Yingqiang Ge|Changhua Pei|Yongfeng Zhang

WWW '21: The Web Conference 2021, Virtual Event / Ljubljana, Slovenia, April 19-23, 2021.

2020

Understanding Echo Chambers in E-commerce Recommender Systems.

Yingqiang Ge|Shuya Zhao|Honglu Zhou|Changhua Pei|Fei Sun|Wenwu Ou|Yongfeng Zhang

Proceedings of the 43rd International ACM SIGIR conference on research and development in Information Retrieval, SIGIR 2020, Virtual Event, China, July 25-30, 2020

2019

BERT4Rec: Sequential Recommendation with Bidirectional Encoder Representations from Transformer.

Fei Sun|Jun Liu|Jian Wu|Changhua Pei|Xiao Lin|Wenwu Ou|Peng Jiang

Proceedings of the 28th ACM International Conference on Information and Knowledge Management, CIKM 2019, Beijing, China, November 3-7, 2019.

Value-aware Recommendation based on Reinforcement Profit Maximization.

Changhua Pei|Xinru Yang|Qing Cui|Xiao Lin|Fei Sun|Peng Jiang|Wenwu Ou|Yongfeng Zhang

The World Wide Web Conference, WWW 2019, San Francisco, CA, USA, May 13-17, 2019

2018

Multi-Source Pointer Network for Product Title Summarization.

Fei Sun|Peng Jiang|Hanxiao Sun|Changhua Pei|Wenwu Ou|Xiaobo Wang

Proceedings of the 27th ACM International Conference on Information and Knowledge Management, CIKM 2018, Torino, Italy, October 22-26, 2018