I am a Ph.D. candidate in the School of Information at University of Michigan. I am fortunate to be advised by Prof. Qiaozhu Mei and be a member of the Foreseer Group. Previously, I received my bachelor degree in Computer Science from Peking University, with a double major in Economics.

I am interested in recommender system, and in general data mining. I am interested in understanding user behaviors from empirical data and design systems that make impact. To achieve this goal, I want to harness both machine learning algorithms and causal inference techniques. Here is my CV.


[Google Scholar profile]

  • Xuanzhe Liu*, Wei Ai*, Huoran Li, Jian Tang, Gang Huang, Feng Feng, Qiaozhu Mei. (* = equal contribution)
    Derive User Preferences of Mobile Apps from their Management Activities.
    ACM Transactions on Information System (TOIS), forthcoming.

  • Wei Ai, Xuan Lu, Xuanzhe Liu, Ning Wang, Gang Huang, Qiaozhu Mei.
    Untangling Emoji Popularity through Semantic Embeddings.
    In Proceedings of the 11th International AAAI Conference on Web and Social Media (ICWSM'17), pp. 2-11, 2017. (14% acceptance)
    [PDF] [Web]

  • Wei Ai, Roy Chen, Yan Chen, Qiaozhu Mei, Webb Phillips.
    Recommending teams promotes pro-social lending in online microfinance.
    Proceedings of the National Academy of Sciences of the United States of America (PNAS), vol. 113, no. 52, pp. 14944-14948, 2016.
    [PDF] [Web]

  • Xuan Lu, Wei Ai, Xuanzhe Liu, Qian Li, Qiaozhu Mei, Ning Wang, Gang Huang.
    Learning from the Ubiquitous Language: An Empirical Analysis of Emoji Usage of Smartphone Users.
    In Proceedings of the 2016 ACM International Joint Conference on Pervasive and Ubiquitous Computing. (UbiComp'16), pp. 770-780, 2016. (26% acceptance)
    [PDF] [Web]

  • Huoran Li*, Wei Ai*, Xuanzhe Liu, Jian Tang, Gang Huang, Feng Feng, Qiaozhu Mei. (* = equal contribution)
    Voting with Their Feet: Inferring User Preferences from App Management Activities.
    In Proceedings of the 25th International World Wide Web Conference (WWW’16), (industry track), pp. 1351-1362, 2016.
    [PDF] [Web]

  • Huoran Li, Wei Ai, Xuanzhe Liu, Qiaozhu Mei, and Feng Feng.
    A Descriptive Analysis of a Large-Scale Collection of App Management Activities.
    In Proceedings of the 24th International Conference on World Wide Web Companion (WWW’15), pp. 61-62, 2015. (poster)
    [PDF] [Web]

  • Lei Chen, Yimin Hu, Wei Ai, Junfeng Hu.
    Extraction of Power Relationship in the Story of Stone Corpus and Construction of Social Network with Power Relationship.
    Journal of Chinese Information Processing, vol. 29, no. 5, pp. 185-194, 2015. (In Chinese)
    [PDF] [Web]


  • Graduate Student Instructor, 2017.1 -- 2017.4
    SI650 Information Retrieval, University of Michigan, Winter 2017.

  • Graduate Student Instructor, 2016.9 - 2016.12
    SI301 Models of Social Information Processing, University of Michigan, Fall 2016.

  • Teaching Assistant, 2013.2 - 2013.6
    Data Structure and Algorithm, Peking University, Spring 2013.

  • Software Engineer Intern at Twitter, 2015.5 - 2015.8
  • Volunteer Intern at Kiva.org, 2014.5
  • Software Engineer Intern at Tencent, 2013.4 - 2013.6