不完备信息系统中的确定优势粗糙决策规则提取

Extracting Decision Rules from Incomplete Information Decision System by Rough Set Model Based on Definitive Dominance Relation

以不完备信息决策系统为研究对象,提出了基于确定优势关系的粗糙集模型。在确定优势关系粗糙集的基础上,提出了相对下、上近似约简的概念,给出了求得相对下、上近似约简的具体方法,并在此基础上提取不完备信息系统中的确定优势粗糙决策规则。应用实例表明了所提出的新方法的有效性。

In this paper,the concept of rough set model based on definitive dominance relation is proposed in the incomplete information decision system.Moreover,based on the definitive dominance-based rough set model,two types of knowledge reductions,the relative lower and upper approximate reductions are proposed.Then,the practical approaches to compute the relative lower and upper approximate reductions are presented.On this basis,one can extract decision rules from incomplete information decision system.Finally,an illustrative example is employed to show the validity of such model and approaches.