Editorship

• Associate Editor, IEEE Transactions on Knowledge and Data Engineering (TKDE), 2003-08.
• Associate Editor, ACM/Springer Multimedia Systems Journal, 2005-10.

Conference Chairs

• Program Co-Chair, Industry Track, IEEE BigMM Conference, 2016.
• Honorable General Co-Chair, IEEE BigData Congress, Taipei Satellite Session, Taipei, 2015.
• Symposium Co-Chair, Greater China MOOC, JiaYuGuan, July 2014.
• Program Chair, Industry Day, Joint Conference of Artificial Intelligence, Beijing, 2013.
• Program Chair (industry track) of IEEE Data Engineering (ICDE), Los Angeles, 2010.
• Program Senior Member of KDD, Washington DC, 2010.
• Program Area Chair of WWW 2010, North Carolina, 2010.
• Panel Chair of ACM MM 2010, Florence, 2010.
• Panel Program Chair of IEEE Data Engineering (ICDE), Shanghai, 2009.
• Program Chair (industry track) of ACM CIVR, Santorini Island, Greece, 2009.
• Workshop Chair of ACM Multimedia, Beijing, 2009.
• Program Vice-chair of WWW 2008.
• Program Vice-chair of IEEE Data Engineering (ICDE), Cancun Mexico, April 2008.
• Special Session Chair of ACM International Conference on Multimedia, Germany, October 2007.
• General Co-chair (Jan 05 - March 06) of the ACM International Conference on Multimedia, Santa Barbara, October 2006.
• General Co-chair of the International Conference on Multimedia Modeling, Beijing, January 2006.
• General Co-chair of the annual ACM Workshop on Video Surveillance and Sensor Networks, 2005.
• Panel Co-chair of the ACM International Conference on Multimedia, 2005.
• Program Co-chair of IS&T/SPIE Storage and Retrieval Methods and Applications for Multimedia, San Jose, January 2005, 2006.
• Program Co-chair of the ACM Workshop on Foundations of Multimedia (FOM) (in cooperation with ACM MM), Singapore, 2005.
• Program Co-chair of the IEEE Workshop on Managing Data for Emerging Multimedia Applications (EMMA) (in cooperation with ICDE), Tokyo, 2005.
• Program Co-chair of the annual ACM Workshop on Video Surveillance and Sensor Networks (in cooperation with ACM MM), Berkeley, 2003; Columbia Univ., 2004.
• Program Area Chair, IEEE International Conference on Multimedia, 2004, 2005.

Program Committee

• Program Committee member of VLDB 2006, 2008, 2009, 2010.
• Program Committee member of ACM KDD 2007, 2010, 2011, 2012, 2013, 2014, 2015.
• Program Committee member of WWW 2006, 2007, 2008, 2009, 2010, 2011.
• Program Committee member of the ACM International Conference on Multimedia, 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010, 2012, 2013.
• Program Committee member of the ACM SIGIR Conf., 2010.
• Program Committee member of the ACM SIGMOD Conf., 2004.
• Program Committee member of the ACM CIKM Conf., 2003, 2004, 2008, 2009, 2010, 2012.
• Program Committee member of the SIAM Data Mining Conf., 2004, 2011.
• Program Committee member of the IEEE Big Data Conf., 2015.
• Program Committee member of the IEEE Data Engineering Conf. (ICDE), 2002, 2007.
• Program Committee member of the IEEE Data Minimg Conf. (ICDM), 2006, 2012.
• Program Committee member of the Internation Conference on Artificial Intelligence (AAAI), 2004, 2015, 2016.
• Panel moderator, the ACM SIGMOD Workshop on Computer Vision Meets Databases (CVDB), 2005.
• Program Committee member of the ACM SIGMOD Workshop on Computer Vision Meets Databases (CVDB), 2004,2005.
• Co-chair, Special Session on Active Learning, IEEE Multimedia, 2004.
• Program Committee member of the IEEE Multimedia Conf., 2002, 2003, 2004, 2005.
• Scientific Committee member of the Tutorial and Research Workshop of Perception and Interactive Technologies, Kloster Irsee, Germany, 2006.
• Program Committee member of the ICCCAS Multimedia Communications, 2004.
• Program Committee member of the Workshop on Multimedia Information Retrieval (MIR), 2006.
• Program Committee member of the Workshop on Multimedia Information Systems (MIS), 2004, 2005.
• Program Committee member of the DAtabase Systems For Advanced Applications (DASFAA) Conf., 2004, 2010, 2011.
• Chair, Special Session on Video Surveillance, IEEE PCM Conf., 2003.
• Program Committee member of International Conference on Computer Vision (ICCV), 2003.
• Program Committee member of the Web Information System Engineering Conf. (WISE), 2002,2003,2004,2005.
• Program Committee member of the Web-age Information Management Conf. (WAIM), 2002,2003.
• Program Committee member of the IS&T/SPIE Storage and Retrieval for Databases, 2003,2004.
• Associate Program Committee Chair of the ACM Multimedia Conf., 2002.
• Program Committee member of the IEEE Pacific-rim Knowledge Discovery Conf., 2002.
• Program Committee member of the IS&T/SPIE Imaging and Multimedia Technology, 2002,2004.
• Program Committee member of the IEEE CBAIVL Workshop, 2000, 2001.
• Panelist, National Science Foundation, 2002-.
• Member of the Executive Committee UC Digital Media Innovation Program, 2000-.
• Local Arrangement Chair of the ACM SIGMOD Conf., 2001.
• Referee for ACM Transactions on Database Systems, ACM Transactions on Multimedia Systems, ACM Transactions on Information Systems, IEEE Transactions on Multimedia, IEEE Transactions on Circuits and Systems for Video Technology, IEEE Transactions on Knowledge and Database Systems, IEEE Transactions on Pattern Analysis and Machine Intelligence, Kluwer Academic Journals, Journal of Electronic Imaging, ACM SIGMOD Conf., ACM PODS Conf., etc.