给出了不协调集值决策信息系统的两种属性约简方法:分配约简和部分一致约简。分配约简保持所有对象的可能决策类不变,部分一致约简保持部分对象的一致决策不变。给出了这些约简的判定定理和辨识矩阵,从而得到了属性约简的具体操作方法。
This paper presents two types of the reduction in an inconsistent set-valued decision information system (DIS).The judgment theorem and the discemibihty matrix of the possible reduct and the partly-accordant reduct are given,from which we provide a material approach to knowledge reduction.A possible consistent set is a subset of the attribute set that preserves all possible decision classes.A partly-accordant consistent set is a subset of the attribute set that preserves accordant decision classes of partly object.