Li Sun

2026

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Label-Free Contrastive Learning for Open-World Multimodal Social Event Detection.
Zhiwei Yang|Haimei Qin|Hao Peng|Xiaoyan Yu|Li Sun|Lei Jiang
Proceedings of the Nineteenth ACM International Conference on Web Search and Data Mining, WSDM 2026, Boise, ID, USA, February 22-26, 2026
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Towards Multifaceted Graph Condensation in Discrete Realm.
Junda Ye|Zhongbao Zhang|Zhizhen He|Feiyang Wang|Li Sun
Proceedings of the Nineteenth ACM International Conference on Web Search and Data Mining, WSDM 2026, Boise, ID, USA, February 22-26, 2026
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The Devil Within, The Cure Without: Securing Locally Private Graph Learning under Poisoning.
Longzhu He|Peng Tang|Li Sun|Sen Su
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.
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Effective and Unsupervised Social Event Detection and Evolution via RAG and Structural Entropy.
Qitong Liu|Hao Peng|Zuchen Li|Xihang Meng|Ziyu Yang|Jiting Li|Li Sun|Philip S. Yu
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.
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Heterophily-Agnostic Hypergraph Neural Networks with Riemannian Local Exchanger.
Li Sun|Ming Zhang|Wenxin Jin|Zhongtian Sun|Zhenhao Huang|Hao Peng|Sen Su|Philip S. Yu
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.
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SLFM: Semi-Supervised Local Community Detection Based on Hyperbolic Flow Matching.
Haixu Xiong|Li Sun|Yun Xiong|Suyang Zhou|Hongrun Ren|Yangyong Zhu
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.
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Riemannian Graph Tokenizer for Structural Knowledge Transfer.
Qimin Zhou|Haibo Liu|Yujie Wang|Li Sun|Chuan Shi
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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Relational Prompt-Based Pre-Trained Language Models for Social Event Detection.
Pu Li|Xiaoyan Yu|Hao Peng|Yantuan Xian|Linqin Wang|Li Sun|Jingyun Zhang|Philip S. Yu
ACM Transactions on Information Systems (TOIS) 2025 Volume 43 Issue 1
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Hyperbolic Prompt Learning for Incremental Event Detection with LLMs.
Xiujin Zhang|Eiman Tamah Al-Shammari|Haotian Hong|Jessica Lin|Wenxin Jin|Jiting Li|Haotian Hong|Eiman Tamah Al-Shammari|Pengfei Zhang|Jessica Lin|Jiting Li|Kongjing Gu|Hao Peng|Li Sun
Proceedings of the 34th ACM International Conference on Information and Knowledge Management, CIKM 2025, Seoul, Republic of Korea, November 10-14, 2025
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RiemannGFM: Learning a Graph Foundation Model from Riemannian Geometry.
Li Sun|Zhenhao Huang|Suyang Zhou|Qiqi Wan|Hao Peng|Philip S. Yu
Proceedings of the ACM on Web Conference 2025, WWW 2025, Sydney, NSW, Australia, 28 April 2025- 2 May 2025

2024

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Multivariate Time-Series Anomaly Detection based on Enhancing Graph Attention Networks with Topological Analysis.
Zhe Liu|Xiang Huang|Jingyun Zhang|Zhifeng Hao|Li Sun|Hao Peng
Proceedings of the 33rd ACM International Conference on Information and Knowledge Management, CIKM 2024, Boise, ID, USA, October 21-25, 2024
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Table-Filling via Mean Teacher for Cross-domain Aspect Sentiment Triplet Extraction.
Kun Peng|Lei Jiang|Qian Li|Haoran Li|Xiaoyan Yu|Li Sun|Shuo Sun|Yanxian Bi|Hao Peng
Proceedings of the 33rd ACM International Conference on Information and Knowledge Management, CIKM 2024, Boise, ID, USA, October 21-25, 2024
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A Mixed-Curvature Graph Diffusion Model.
Yujie Wang|Shuo Zhang|Junda Ye|Hao Peng|Li Sun
Proceedings of the 33rd ACM International Conference on Information and Knowledge Management, CIKM 2024, Boise, ID, USA, October 21-25, 2024
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Adaptive Differentially Private Structural Entropy Minimization for Unsupervised Social Event Detection.
Zhiwei Yang|Yuecen Wei|Haoran Li|Qian Li|Lei Jiang|Li Sun|Xiaoyan Yu|Chunming Hu|Hao Peng
Proceedings of the 33rd ACM International Conference on Information and Knowledge Management, CIKM 2024, Boise, ID, USA, October 21-25, 2024
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DAMe: Personalized Federated Social Event Detection with Dual Aggregation Mechanism.
Xiaoyan Yu|Yifan Wei|Pu Li|Shuaishuai Zhou|Hao Peng|Li Sun|Liehuang Zhu|Philip S. Yu
Proceedings of the 33rd ACM International Conference on Information and Knowledge Management, CIKM 2024, Boise, ID, USA, October 21-25, 2024
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R-ODE: Ricci Curvature Tells When You Will be Informed.
Li Sun|Jingbin Hu|Mengjie Li|Hao Peng
Proceedings of the 47th International ACM SIGIR Conference on Research and Development in Information Retrieval, SIGIR 2024, Washington DC, USA, July 14-18, 2024
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RicciNet: Deep Clustering via A Riemannian Generative Model.
Li Sun|Jingbin Hu|Suyang Zhou|Zhenhao Huang|Junda Ye|Hao Peng|Zhengtao Yu|Philip S. Yu
Proceedings of the ACM on Web Conference 2024, WWW 2024, Singapore, May 13-17, 2024

2023

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GroupAligner: A Deep Reinforcement Learning with Domain Adaptation for Social Group Alignment.
Li Sun|Yang Du|Shuai Gao|Junda Ye|Feiyang Wang|Fuxin Ren|Mingchen Liang|Yue Wang|Shuhai Wang
ACM Transactions on the Web 2023 Volume 17 Issue 3
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MC2: Unsupervised Multiple Social Network Alignment.
Li Sun|Zhongbao Zhang|Gen Li|Pengxin Ji|Sen Su|Philip S. Yu
ACM Transactions on Intelligent Systems and Technology (TIST) 2023 Volume 14 Issue 4
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SINCERE: Sequential Interaction Networks representation learning on Co-Evolving RiEmannian manifolds.
Junda Ye|Zhongbao Zhang|Li Sun|Yang Yan|Feiyang Wang|Fuxin Ren
Proceedings of the ACM Web Conference 2023, WWW 2023, Austin, TX, USA, 30 April 2023 - 4 May 2023

2022

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A Self-supervised Riemannian GNN with Time Varying Curvature for Temporal Graph Learning.
Li Sun|Junda Ye|Hao Peng|Philip S. Yu
Proceedings of the 31st ACM International Conference on Information & Knowledge Management, Atlanta, GA, USA, October 17-21, 2022
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DiriE: Knowledge Graph Embedding with Dirichlet Distribution.
Feiyang Wang|Zhongbao Zhang|Li Sun|Junda Ye|Yang Yan
WWW '22: The ACM Web Conference 2022, Virtual Event, Lyon, France, April 25 - 29, 2022

2020

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Enhancing Graph Neural Network-based Fraud Detectors against Camouflaged Fraudsters.
Yingtong Dou|Zhiwei Liu|Li Sun|Yutong Deng|Hao Peng|Philip S. Yu
CIKM '20: The 29th ACM International Conference on Information and Knowledge Management, Virtual Event, Ireland, October 19-23, 2020