Associate Professor · NTU CCDS · Singapore

Sun
Aixin

Associate Dean (Undergraduate Education)

Faculty at the College of Computing and Data Science, Nanyang Technological University. B.A.Sc. (First Class Honours) and Ph.D. from NTU in 2001 and 2004. Research spans information retrieval, recommender systems, and natural language processing — with ~300 published papers and over 26,000 citations.

✉ axsun AT ntu DOT edu DOT sg
☎ (+65) 6790 5139
⌂ S3-B1C-117, NTU
🏆
Test of Time Award SIGIR 2025 — Honorable Mention for "Time-Aware Point-of-Interest Recommendation"
🥇
Best Student Paper Award IEEE Services Computing 2020 · Honorable Mention at SIGIR 2016
→ Publications All Papers ~300 peer-reviewed works → Team Research Group Students & projects → Resources Datasets Open research data → Teaching Courses Instructor & tutor

Recent Papers

SELECTED 2024–2026
RecSys
A Position Paper on Recommender Systems in the Era of Autonomous Agents.
Aixin Sun
RecSys 2026
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CV
Error Analyses of Auto-Regressive Video Diffusion Models.
Jing Wang*, Fengzhuo Zhang*, Xiaoli Li, Vincent Y. F. Tan, Tianyu Pang, Chao Du, Aixin Sun, Zhuoran Yang
Journal of Machine Learning Research (JMLR) — Accepted.
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RecSys
A Task-Centric Perspective on Recommender Systems
Aixin Sun
Communications of the ACM (CACM) — Accepted.
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RecSys IR
OneTrans: Unified Feature Interaction and Sequence Modeling with One Transformer in Industrial Recommender
Zhaoqi Zhang, Haolei Pei, Jun Guo, Tianyu Wang, Yufei Feng, Hui Sun, Shaowei Liu, Aixin Sun
WWW 2026 — Industry Track
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RecSys
Hesitation and Tolerance in Recommender Systems
Kuan Zou, Aixin Sun, Yitong Ji, Hao Zhang, Jing Wang, Zhuohao Zhang, Xuemeng Jiang
ACM CHI 2026
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IR
A Flexible and Scalable Framework for Video Moment Search
Chongzhi Zhang, Xizhou Zhu, Aixin Sun
SIGIR-AP 2025
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IR
TVR-Ranking: A Dataset for Ranked Video Moment Retrieval with Imprecise Queries
Renjie Liang, Chongzhi Zhang, Li Li, Jing Wang, Xizhou Zhu, Aixin Sun
SIGIR-AP 2025
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IR NLP
Towards Storage-Efficient Visual Document Retrieval: An Empirical Study on Reducing Patch-Level Embeddings
Yubo Ma, Jinsong Li, Yuhang Zang, Xiaobao Wu et al., Aixin Sun
ACL 2025 Findings
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NLP IR
MMLongBench-Doc: Benchmarking Long-context Document Understanding with Visualizations
Yubo Ma, Yuhang Zang, Liangyu Chen et al., Aixin Sun
NeurIPS 2024 — Datasets & Benchmarks
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RecSys
A Survey of Real-World Recommender Systems: Challenges, Constraints, and Industrial Perspectives
Kuan Zou, Aixin Sun
Working Paper
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View all publications →

News

2025–2026
July 2026
Glad to have my position paper accepted at RecSys 2026!
May 2026
Congratulations to Jing and Fengzhuo for JMLR paper acceptance.
Apr 2026
Congratulations to Guoxiu and Yequan for ICML paper acceptance.
Jan 2026
Keynote titled "A Flexible and Scalable Framework for Video Moment Search" at the AAAI 2026 Workshop on New Frontiers in Information Retrieval.
Jan 2026
Paper acceptances — Zhaoqi Zhang to WWW26 and Zou Kuan to CHI26. Congratulations!
Nov 2025
Keynote on Storage-Efficient Visual Document Retrieval at the BigIS Workshop, IEEE ICDM 2025.
Sept 2025
Keynote on Multimodality Recommender Systems at the DaQuaMRec workshop, RecSys 2025, Prague.
Sept 2025
Two papers accepted at SIGIR-AP 2025 — both on ranked video moment retrieval (TVR-Ranking and Flexible Framework).
Jul 2025
"Time-Aware Point-of-Interest Recommendation" receives Test of Time Honorable Mention Award at SIGIR 2025. 🏆 Award
May 2025
The DecayPop algorithm achieves top performance on Yambda-5B — a 5-billion interaction dataset from Yandex.

Professional Service

EDITORIAL & COMMITTEES
Editorial Roles
Conference Roles
2026
SIGIR SAC ARR Action Editor
2025
SIGIR AC RecSys SPC NeurIPS AC ARR Action Editor
2024
WWW Search Track Co-Chair SIGIR SPC RecSys SPC NeurIPS AC
2023
EMNLP Publication Chair WSDM DC Co-Chair SIGIR SPC WWW SPC