中文摘要：

E-mail：liuyubao@mail.sysu.edu.cn Yu-Bao Liu received his B.Eng. and M.Eng. degrees, both in computer science, from Xiangtan University, China in 1997, 2000, respectively, and his Ph.D. degree in computer science from Huazhong University of Science and Technology in 2003, China. He is currently a lecturer in the Department of Computer Science of Sun Yat-Sen University. He has published more than 30 refereed journal and conference papers. His research interests include database system, data warehouse and data mining. He is also a member of China Computer Federation （CCF）. E-mail：issjyin@mail.sysu.edu.cn; Jia-Rong Cai is a graduate student of the Department of Computer Science of Sun Yat-Sen University. His research interests include data mining and information retrieval. E-mail：kelvin2004_cai@163.com Jian Yin received the B.S., M.S., and Ph.D. degrees from Wuhan University, China, in 1989, 1991, and 1994, respectively, all in computer science. He joined Sun Yat-Sen University in July 1994 and now he is a professor with Information Science and Technology School. He served as a PC member of ICMLC 2005, PRICAI 2006,PAKDD 2006, 2007, 2008. His current research interests are in the areas of data mining, database, artificial intelligence, and machine learning. E-mail：adafu@cse.cuhk.edu.hk Ada Wai-Chee Fu received her B.Sc. degree in computer science from the Chinese University of Hong Kong in 1983, and both M.Sc. and Ph.D. degrees in computer science from Simon Fraser University of Canada in 1986, 1990, respectively. She worked at Bell Northern Research in Ottawa, Canada from 1989 to 1993 on a wide-area distributed database project and joined the Chinese University of Hong Kong in 1993, where she is now an associate professor in the Department of Computer Science and Engineering. Her research interests include issues in database systems, data mining, and P2P data retrieval. She is a member of the ACM and IEEE associations.