His research interests are mobile computing and social computing, with particular focus on mining with heterogeneous and structured data. He has served as PCs in many leading data mining and artificial intelligence conferences such as KDD, IJCAI, AAAI, WWW, WSDM. He also co-organized the first IEEE ICDM Data Mining Contest in 2007, and the International Workshop on Localization Technology and Location-based Service at IEEE CPSCom’13. He has published 50 papers in the refereed conferences, journals and book chapters. He is a member of AAAI and ACM.