He received the B.S. and the Ph.D. degrees from Zhejiang University in 1999 and 2004, respectively. From January 2006 to July 2007, he performed postdoctoral research in the University of Nottingham, UK. His current research interests include ubiquitous computing, human activity recognition, location-aware computing, database, etc. He published more than 70 academic papers in journals and conferences such as TMC, TCYB, TMM, TITS, TBME, PR, UbiComp, AAAI, MM, PerCom, etc. He has served as the chairman of conferences, e.g., GPC, NCM, and DMAMH. He has also served as the TPC member of conferences, e.g., ACCV, CASA, NetGames, CUTE, and CCF Bigdata. He is a member of CCF Pervasive Computing Committee.