... scientists and engineers allO. Maimon, L. Rokach (eds.), Data Mining and Knowledge Discovery Handbook, 2nd ed., DOI 10.1007/978-0-387-09 823 -4 _23 , © Springer Science+Business Media, LLC 20 10 22 Granular ... systems (Zadeh, 197 3). Many ideas have beenexplored (Lin, 198 8, Lin, 198 9a, Chu and Chen, 19 92, Raghavan, 199 5, Miyamoto, 20 04, Liu, 20 04, Grzymala-Busse, 20 04, Wang, 20 04,Yao, 20 04, Yao, 20 04).There ... modeling data and thus plays a central role in the pro-cess of knowledge discovery and data mining. Data mining tasks, in these days, require fast and accurate partitioning of huge datasets,...