Rough Sets, Fuzzy Sets, Data Mining, and Granular Computing 9th International Conference, RSFDGrC 2003, Chongqing, China, May 26-29, 2003, Proceedings - Wang, Guoyin; Wang, Guoyin; Liu, Qing; Liu, Qing; Yao, Yiyu; Yao, Yiyu (Springer Berlin Heidelberg : Imprint: Springer, 2003)