关键词: 模糊目标信息系统, 粗糙集, 属性约简, 优势关系, 决策规则

Abstract: In the fuzzy decision information system，the acquisition of optimal ordered decision rules is discussed by using the fuzzy rough set model based on dominance relation.Firstly，three kinds of attribute reduction of objects in fuzzy objects information system are defined by using dominance relation.Then the judgment theorems are given，and discernibility functions with corresponding to them are constructed and used to compute the attribute reduction of objects by using Boolean reasoning techniques.Finally，based on these reductions，three new types of optimal decision rules are obtained.

Key words: fuzzy objects information system, rough set, attribute reduction, dominance relation, decision rule