In brief, the rough set theory and method is quite an efficient means to deal with complex system, which is applied to the field of dataABSTRACTmining(DM) and knowledge discovery in database(KDD).

• 总结全文，粗糙集理论与方法对于处理复杂系统不失为一种较为有效的手段，被广泛应用于数据挖掘(DM)和数据库知识发现(KDD)领域中。