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Dr. Sun Aixin is an Associate Professor and Associate Chair (Academic) at the School of Computer Science and Engineering (SCSE), Nanyang Technological University (NTU), Singapore. He has been a faculty member of SCSE since 2005 and was the Assistant Chair (Acadmic) from 2020 to 2023, and Assistant Chair (Admissions and Outreach) from 2016 to 2020. He is a member of Singapore Data Science Consortium (SDSC) Technical Committee, and SDSC institution representative of NTU.

Dr. Sun received B.A.Sc (1st class honours) and Ph.D. both in Computer Engineering from NTU in 2001 and 2004 respectively. His current research interests include information retrieval, text mining, social computing, and digital libraries. He has published about 200 papers in major international journals and conferences. According to Google Scholar, his papers have received more than 15,500 citations, with h-index 57.

Dr. Sun is an associate editor of ACM Transactions on Information Systems (TOIS), Neurocomputing, editorial board member of Journal of the Association for Information Science and Technology (JASIST), and Information Retrieval Journal. He has served as the Doctoral Consortium co-chair for WSDM2023, demonstration track co-chair for SIGIR2020, ICDM2018, CIKM2017, PC co-chair for AIRS2019, and general chair for ADMA2017. He was a member of the best paper committee for SIGIR2020 and SIGIR2022. He has also served as Area Chair, Senior PC member or PC member for many conferences including SIGIR, WWW, WSDM, 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 Information Systems (TOIS)
  • Journal of the Association for Information Science and Technology (JASIST)
  • Information Retrieval Journal (IRJ)
  • Neurocomputing
• Conference organization and PC members:
  • 2023: EMNLP (Publication Chair), SIGIR (SPC, and PC for Perspectives Paper Track), WWW (SPC), IJCAI (AC), WSDM (DC Co-Chair)
  • 2022: WWW (SPC), IJCAI (SPC), ECIR, SIGIR(SPC, and PC for Perspectives Paper Track), KDD (PC for Applied Data Science Track)
  • 2021: WSDM, IJCAI (AC), NAACL-HIT (AC), SIGIR (SPC), ACL, NeurIPS (PC for Datasets and Benchmarks Track)
  • 2020: SIGIR (Demo Co-Chair, Member of Best Paper Committee, PC Member), PAKDD (Publicity Co-Chair), EMNLP (AC), WWW, WSDM, IJCAI (SPC)
  • 2019: AIRS (PC Co-Chair), WWW, WSDM, SIGIR, NLPCC, CIKM (SPC)

Revisiting Recommender Systems

• Take a Fresh Look at Recommender Systems from an Evaluation Standpoint. SIGIR2023
  Aixin Sun RecSys Here is a short summary
• A Re-visit of the Popularity Baseline in Recommender Systems.
  Yitong Ji, Aixin Sun, Jie Zhang, and Chenliang Li. SIGIR 2020 (Short paper) RecSys
• A Critical Study on Data Leakage in Recommender System Offline Evaluation.
  Yitong Ji, Aixin Sun, Jie Zhang, and Chenliang Li. ACM TOIS 41(3):1-27 2023.RecSys
• Do Loyal Users Enjoy Better Recommendations? Understanding Recommender Accuracy from a Time Perspective.
  Yitong Ji, Aixin Sun, Jie Zhang, and Chenliang Li. ICTIR 2022 RecSys

Survey papers

• Temporal Sentence Grounding in Videos: A Survey and Future Directions.
  Hao Zhang, Aixin Sun, Wei Jing, and Joey Tianyi Zhou. Accepted in IEEE PAMI 2023 IR NLP CV
• A Survey on Neural Open Information Extraction: Current Status and Future Directions.
  Shaowen Zhou, Bowen Yu, Aixin Sun, Cheng Long, Jingyang Li, and Jian Sun. IJCAI 2022 NLP
• A Survey on Deep Learning for Named Entity Recognition. [800+ Citations]
  Jing Li, Aixin Sun, Jianglei Han, and Chenliang Li. TKDE 34(1): 50-70 (2022). NLP IR
• Deep Learning based Recommender System: A Survey and New Perspectives [2200+ Citations]
  Shuai Zhang, Lina Yao, Aixin Sun, and Yi Tay. ACM Computing Surveys. Feb 2019 RecSys
• A Survey of Location Prediction on Twitter [200+ Citations]
  Xin Zheng, Jialong Han, Aixin Sun. IEEE TKDE. 30(9): 1652-1671 Twitter POI

Recent papers

• MS-DETR: Natural Language Video Localization with Sampling Moment-Moment Interaction.
  Wang Jing, Aixin Sun, Hao Zhang and Xiaoli Li. Accepted in ACL 2023. NLP
• Few-shot Event Detection: An Empirical Study and a Unified View.
  Yubo Ma, Zehao Wang, Yixin Cao and Aixin Sun. Accepted in ACL 2023. NLP
• Negation Scope Refinement via Boundary Shift Loss.
  Yin Wu and Aixin Sun. Accepted in ACL 2023 Findings. NLP
• Take a Fresh Look at Recommender Systems from an Evaluation Standpoint.
  Aixin Sun. Accepted in SIGIR 2023. RecSys
• SelfCF: A Simple Framework for Self-supervised Collaborative Filtering.
  Xin Zhou, Aixin Sun, Yong Liu, Jie Zhang, Chunyan Miao. Accepted in ACM TORS 2023. RecSys
• EDU-Capsule: Aspect-based Sentiment Analysis at Clause Level.
  Ting Lin*, Aixin Sun, and Yequan Wang. Knowledge and Information Systems (KAIS), 65(2): 517-541 (2023) NLP
• Asking Clarifying Questions: to Benefit or to Disturb Users in Web Search?
  Jie Zou, Aixin Sun, Cheng Long∧, Mohammad Aliannejadi, Evangelos Kanoulas. Information Processing & Management (IP&M), 60 (2): 103176. 2023 IR
• DOCoR: Document-level OpenIE with Coreference Resolution.
  Shan Jie Yong, Kuicai Dong, Aixin Sun. WSDM 2023: 1204-1207 (Demo paper) NLP
• Syntactic Multi-view Learning for Open Information Extraction.
  Kuicai Dong, Aixin Sun, Jung-Jae Kim and Xiaoli Li. EMNLP 2022 NLP
• CORT: A New Baseline for Comparative Opinion Classification by Dual Prompts.
  Yequan Wang, Hengran Zhang, Aixin Sun and Xuying Meng. EMNLP 2022 Findings NLP