Cheng Long

2026

Cross-city Time Series Forecasting with Retrieval-Augmented Large Language Models.

Yue Jiang|Chenxi Liu|Yile Chen|Qin Chao|Shuai Liu|Cheng Long|Gao Cong

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

Facet-Aware Multi-Head Mixture-of-Experts Model for Sequential Recommendation.

Mingrui Liu|Sixiao Zhang|Cheng Long

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

HHGT: Hierarchical Heterogeneous Graph Transformer for Heterogeneous Graph Representation Learning.

Qiuyu Zhu|Liang Zhang|Qianxiong Xu|Kaijun Liu|Cheng Long|Xiaoyang Wang

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

Mask-based Membership Inference Attacks for Retrieval-Augmented Generation.

Mingrui Liu|Sixiao Zhang|Cheng Long

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

2024

Knowledge-Enhanced Conversational Recommendation via Transformer-Based Sequential Modeling.

Jie Zou|Aixin Sun|Cheng Long|Evangelos Kanoulas

ACM Transactions on Information Systems (TOIS) 2024 Volume 42 Issue 6

Watermarking Recommender Systems.

Sixiao Zhang|Cheng Long|Wei Yuan|Hongxu Chen|Hongzhi Yin

Proceedings of the 33rd ACM International Conference on Information and Knowledge Management, CIKM 2024, Boise, ID, USA, October 21-25, 2024

OpenSiteRec: An Open Dataset for Site Recommendation.

Xinhang Li|Xiangyu Zhao|Yejing Wang|Yu Liu|Chong Chen|Cheng Long|Yong Zhang|Chunxiao Xing

Proceedings of the 47th International ACM SIGIR Conference on Research and Development in Information Retrieval, SIGIR 2024, Washington DC, USA, July 14-18, 2024

Defense Against Model Extraction Attacks on Recommender Systems.

Sixiao Zhang|Hongzhi Yin|Hongxu Chen|Cheng Long

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

2023

Asking Clarifying Questions: To benefit or to disturb users in Web search?

Jie Zou|Aixin Sun|Cheng Long|Mohammad Aliannejadi|Evangelos Kanoulas

Information Processing and Management 2023 Volume 60 Issue 2

2022

Traffic Speed Imputation with Spatio-Temporal Attentions and Cycle-Perceptual Training.

Qianxiong Xu|Sijie Ruan|Cheng Long|Liang Yu|Chen Zhang

Proceedings of the 31st ACM International Conference on Information & Knowledge Management, Atlanta, GA, USA, October 17-21, 2022

Improving Conversational Recommender Systems via Transformer-based Sequential Modelling.

Jie Zou|Evangelos Kanoulas|Pengjie Ren|Zhaochun Ren|Aixin Sun|Cheng Long

SIGIR '22: The 45th International ACM SIGIR Conference on Research and Development in Information Retrieval, Madrid, Spain, July 11 - 15, 2022

Prototype Feature Extraction for Multi-task Learning.

Shen Xin|Yuhang Jiao|Cheng Long|Yuguang Wang|Xiaowei Wang|Sen Yang|Ji Liu|Jie Zhang

WWW '22: The ACM Web Conference 2022, Virtual Event, Lyon, France, April 25 - 29, 2022

2021

Robust Road Network Representation Learning: When Traffic Patterns Meet Traveling Semantics.

Yile Chen|Xiucheng Li|Gao Cong|Zhifeng Bao|Cheng Long|Yiding Liu|Arun Kumar Chandran|Richard Ellison

CIKM '21: The 30th ACM International Conference on Information and Knowledge Management, Virtual Event, Queensland, Australia, November 1 - 5, 2021

2020

Generating Full Spatiotemporal Vehicular Paths: A Data Fusion Approach.

Nan Xiao|Nan Hu|Liang Yu|Cheng Long

CIKM '20: The 29th ACM International Conference on Information and Knowledge Management, Virtual Event, Ireland, October 19-23, 2020

Multi-Channel Sellers Traffic Allocation in Large-scale E-commerce Promotion.

Shen Xin|Yizhou Ye|Martin Ester|Cheng Long|Jie Zhang|Zhao Li|Kaiying Yuan|Yanghua Li

CIKM '20: The 29th ACM International Conference on Information and Knowledge Management, Virtual Event, Ireland, October 19-23, 2020

Context-aware Deep Model for Joint Mobility and Time Prediction.

Yile Chen|Cheng Long|Gao Cong|Chenliang Li

WSDM '20: The Thirteenth ACM International Conference on Web Search and Data Mining, Houston, TX, USA, February 3-7, 2020