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Dr. Sun Aixin is an Associate Professor and Associate Dean (Undergraduate Education) at the College of Computing and Data Science (CCDS), Nanyang Technological University (NTU), Singapore, where he has been a faculty member since 2005. His previous roles include Associate Chair (Academic) from 2023 to 2024 and Assistant Chair from 2016 to 2023. Dr. Sun also serves on the Singapore Data Science Consortium (SDSC) Technical Committee and is NTU's SDSC institution representative. He received B.A.Sc (1st class honours) in Computer Engineering and Ph.D. from NTU in 2001 and 2004, respectively. His research interests encompass information retrieval, recommender systems, and NLP. He has about 300 publications with more than 23,000 citations and an h-index of 68 accoring to Google Scholar.

Dr. Sun is an associate editor for ACM Transactions on Information Systems (TOIS), ACM Transactions on Recommender Systems (TORS), ACM Transactions on Intelligent Systems and Technology (TIST), and an editorial board member of the Journal of the Association for Information Science and Technology (JASIST). He has held significant conference roles, including Doctoral Consortium co-chair for WSDM2023, demonstration track co-chair for SIGIR2020, ICDM2018, and CIKM2017, PC co-chair for AIRS2019, and general chair for ADMA2017. He has also contributed to the best short paper committee for SIGIR2020 and SIGIR2022 and served as an Area Chair, Senior PC member, or PC member for numerous key conferences such as SIGIR, WWW, WSDM, NeurIPS, EMNLP, AAAI, and IJCAI.

Email: axsun AT ntu DOT edu DOT sg Phone: (+65) 6790 5139 Office: N4-2C-102

Professional services

• Associate Editor and Editorial Board Member:
  • ACM Transactions on Recommender Systems (TORS), Feb 2025 -- Present
  • ACM Transactions on Information Systems (TOIS), Aug 2022 -- Present
  • ACM Transactions on Intelligent Systems and Technology (TIST), June 2024 -- Present
  • Journal of the Association for Information Science and Technology (JASIST), Jan 2018 -- Present
  • ACM Transactions on Asian and Low-Resource Language Information Processing (TALLIP), Aug 2023 -- Dec 2024
  • Information Retrieval Journal, Springer, Oct 2017 -- Dec 2023
  • Neurocomputing, Aug 2018 -- May 2025
• Conference organization and PC members:
  • 2025: Action Editor for ARR (ACL, EACL, NAACL), SIGIR (AC, and PC for Perspectives Paper Track), RecSys (SPC), NeurIPS (AC for Datasets and Benchmarks Track)
  • 2024: WWW (Search Track Co-Chair). Action Editor for ARR (ACL, EACL, NAACL), SIGIR (SPC, and PC for Perspectives Paper Track), RecSys (SPC), NeurIPS (AC for Datasets and Benchmarks Track)
  • 2023: EMNLP (Publication Chair), SIGIR (SPC, and PC for Perspectives Paper Track), WWW (SPC), IJCAI (AC), WSDM (DC Co-Chair), NeurIPS (AC for Datasets and Benchmarks Track), SIGIR-AP (SPC)
  • 2022: WWW (SPC), IJCAI (SPC), ECIR, SIGIR(SPC, and PC for Perspectives Paper Track), KDD (PC for Applied Data Science Track)

Recent papers

• Towards Storage-Efficient Visual Document Retrieval: An Empirical Study on Reducing Patch-Level Embeddings
  Yubo Ma, Jinsong Li, Yuhang Zang, Xiaobao Wu, Xiaoyi Dong, Pan Zhang, Yuhang Cao, Haodong Duan, Jiaqi Wang, Yixin Cao, Aixin Sun. ACL 2025 Findings IR NLP
• Punctuation Restoration: A Case Study of BERT-Based Models' Task-Specific Excellence
  Qishuai Zhong and Aixin Sun. IEEE ICASSP 2025. NLP
• MMLONGBENCH-DOC: Benchmarking Long-context Document Understanding with Visualizations
  Yubo Ma, Yuhang Zang, Liangyu Chen, Meiqi Chen, Yizhu Jiao, Xinze Li, Xinyuan Lu, Ziyu Liu, Yan Ma, Xiaoyi Dong, Pan Zhang, Liangming Pan, Yu-Gang Jiang, Jiaqi Wang, Yixin Cao, and Aixin Sun. NeurIPS2024 D&B NLP IR
• SciAgent: Tool-augmented Language Models for Scientific Reasoning
  Yubo Ma, Zhibin Gou, Junheng Hao, Ruochen Xu, Shuohang Wang, Liangming Pan, Yujiu Yang, Yixin Cao, Aixin Sun. EMNLP 2024. Accepted NLP
• Right Tool, Right Job: Recommendation for Repeat and Exploration Consumption in Food Delivery
  Jiayu Li, Aixin Sun, Weizhi Ma, Peijie Sun and Min Zhang. RecSys 2024 Accepted RecSys
• Not All Videos Become Outdated: Short-Video Recommendation by Learning to Deconfound Release Interval Bias
  Lulu Dong, Guoxiu He and Aixin Sun. RecSys 2024 Accepted. RecSys
• Knowledge-Enhanced Conversational Recommendation via Transformer-based Sequential Modelling
  Jie Zou, Aixin Sun, Cheng Long, Evangelos Kanoulas. TOIS 2024. RecSys
• On Context Utilization in Summarization with Large Language Models
  Mathieu Ravaut, Aixin Sun, Nancy F. Chen, Shafiq Joty. ACL 2024. NLP IR
• Towards Verifiable Generation: A Benchmark for Knowledge-aware Language Model Attribution.
  Xinze Li, Yixin Cao, Liangming Pan, Yubo Ma, Aixin Sun. ACL 2024 Findings. NLP
• Parameter-Efficient Conversational Recommender System as a Language Processing Task
  Mathieu Ravaut, Hao Zhang, Lu Xu, Aixin Sun, Yong Liu. EACL 2024. NLP RecSys
• DiffuRec: A Diffusion Model for Sequential Recommendation
  Zhihao Li, Aixin Sun, Chenliang Li. ACM TOIS: 42(3), Article 66. May 2024. RecSys
• DP-GCN: Node Classification by Connectivity and Local Topology Structure on Real-World Network
  Zhe Chen, Aixin Sun. ACM TKDD. Accepted 2004. DM IR
• Large Language Model Is Not a Good Few-shot Information Extractor, but a Good Reranker for Hard Samples!
  Yubo Ma, Yixin Cao, Yong Ching Hong, Aixin Sun. EMNLP 2023 Findings. NLP IR