2011

• General Co-Chair, ACML 2011, Third Asian Conference on Machine Learning, Nov. 13-15, 2011, Taipei.
• Vice Chair of ACM SIGART (ACM Special Interest Group on Artificial Intelligence). July 2010 -
       - Introduction to SIGART at Chinese Computer Federation:《中国计算机学会通讯》 2011年第11期
• IJCAI-11 Chair of Special Track on Integrated and Embedded Artificial Intelligence (IEAI CFP)
• IEEE ICDM 2011: Vice Chair of Program Committee.
• ACM WSDM 2011 (Hong Kong, February 7-10, 2011), Publicity Chair and Senior PC.
• ACM KDD 2011: Senior PC Member
• AAAI 2011: Area Chair
• ACM UbiComp 2011: PC Member
• ACM CIKM 2011: Senior PC Member
• NSF Workshop on Pervasive Computing at Scale (PeCS 2011)
• The National Academies and A*STAR (Singapore), March 2011: "Realizing the Value of Big Data", Article 1, Article 2
• MLA 2011: Chinese Workshop on Machine Learning Applications, Tsinghua University, Nov 2011.
• 2011 CCDM (2011中国数据挖掘年会), Industry Panel: Large Scale Recommendation Systems, May 5-7, 2011, Guangzhou, China

2010

• ACM KDD 2010: PC Co-Chair, 2010 (KDD 2010 Social Network Site)
• ACM IUI 2010 (ACM Intelligent User Interfaces Conference, Feb 2010, Hong Kong, China), General Co-Chair
• 2010 ACM Hong Kong Bioinformatics Symposium (HKUST): PC Co-Chair
• Co-Guest Editor: IEEE Intelligent Systems Special Issue on Social Learning
• AAAI 2010 AI-Web: Senior PC
• 2010 Dragon-star Lecture on Data Mining (2010 龙星计 划: May 10-14, 2010.)
• ACML 2010 Program Committee Co-Chair
• ICDM 2010: Vice PC Chair
• Co-organizer of MLA 2010: Machine Learning and Applications Workshop, Nanjing, Nov 7/8, 2010.
• Guest Editors: IEEE Intelligent Systems: Social Learning (July/Aug 2010)

2009

• Organizing Committee Member: NIPS 2009 Workshop on Transfer Learning for Structured Data (TLSD-09).
• Co-Chair: The First International Workshop on Transfer Mining (IEEE ICDM 2009 Workshop).
• PC Co-Chair: 2010 ACM Hong Kong Bioinformatics Symposium (HKUST).
• Co-Guest Editor: IEEE Intelligent Systems Special Issue on Mobile Information Retrieval (Vol. 25, Issue 1, 2010) (Guest Editor's Introduction: PDF).
• General Co-Chair: 2009 Advanced Data Mining and Applications Conference (ADMA'09), Beijing China, August 2009 (Conference Photo 5MB).
• Chair: 2009 IEEE ICDM Data Mining Contest and 2007 IEEE ICDM Data Mining Contest.
• Co-Organizer: The 7th Chinese Workshop on Machine Learning and Applications MLA '09.
• Vice Chair in Knowledge Management Track: 2009 ACM CIKM Conference.
• Area Chair: the First Asian Machine Learning Conference (ACML 2009), Nov 2-4, 2009.
• PC Member: the Fifth Asia Information Retrieval Symposium (AIRS 2009), ICCBR 2009.
• Program Chair: 2009 ACM-Hong Kong Student Research and Career Day. 2009
• Workshop Co-Chair: the 2nd IEEE Pervasive Computing Conference, Workshop on Intelligent Pervasive Devices (PerDev2009).

2008 and before

• Associate Editor: International Journal of Knowledge and Information Systems, Springer, 2003 - 2008.
• PC Member: NIPS 2009, ICDM 2009, IJCAI 2009, IJCAI 2009 Workshop on Grand Challenges for Reasoning from Experiences and Workshop on Learning Structural Knowledge From Observations, etc.
• Guest Editor: IEEE Intelligent System, Special Issue on Data Mining and Bioinformatics (2005).
• Guest Editor: IEEE Transactions on Data and Knowledge Engineering, Special Issue on Data Preparation (2006).
• Guest Editor: IEEE/ACM Transactions on Computational Biology and Bioinformatics Special Issue on Machine Learning and Bioinformatics (2005).
• Co-Guest Editor: IEEE Intelligent Systems Special Issue on Data and Information Cleaning and Preprocessing (2004).
• Co-Guest Editor: IEEE Intelligent Systems Special Issue on Mining the Web for Actionable Knowledge (2004).
• Co-Guest Editor: Applied Artificial Intelligence Journal, Special Issue on Data Cleaning and Preparation for Data Mining (2003).
• Co-Guest Editor: Computational Intelligence Journal, Special Issue on Case-Base Maintenance (2001).
• Program Co-Chair: The Ninth Biennial Pacific Rim Artificial Intelligence Conference (PRICAI 2006), Guilin, Guangxi, China, 2006.
• Program Co-Chair: 2007 Pacific Asia Conference on Knowledge Discovery and Data Mining (PAKDD 2007), Nanjing, China, 2007.
• Tutorial Co-Chair: The Twentieth National Conference on Artificial Intelligence (AAAI 2005, and AAAI 2006) (Call for Tutorials).
• IEEE ICDM 2007 Data Mining Contest Co-Chair (Aug to Oct 2007): Link to 2007 ICDM Data Mining Contest and Data Sets.
• AAAI-08 AI on the Web Senior PC, ICML-08 PC, WWW-08 China Track PC, PAKDD 2008 Area Chair, PRICAI 2008 Area Chair, CIKM 2008 PC, WSDM 2008 PC, IEEE Percom Workshop on Power-aware Computing 2008/09, IUI-09 Senior PC, Workshop Chair, ACM SIGKDD Conference 2007.  Workshop CFP,  Workshop List.
• Industry Track & Demo-Exhibits Co-Chair: IEEE Web Intelligence Conference/ACM WI-Intelligent Agent Technology'04, Beijing, China.
• Co-Chair: AIPS Workshop on Real World Planning, Toulouse, France, 2002.
• Conference Committee Member and Reviewer: AAAI 2007, IJCAI 2007, KDD 2007, ICDM 2007, ICAPS 2007, ICCBR 2007, APBC07, AAAI04, ICDM 04, PRICAI04, KCAP03, ICCBR03, ICDM03, WISE03, ICAPS03, APWEB03, AAAI02, AIPS '02, IUI '02, AAMAS 02.
• Conference Chair: ICCBR 2001 (2001 International Conference on Case Based Reasoning, Vancouver BC, Canada).