中文摘要：

进一步研究了直觉模糊信息系统的优势关系及其约简方法。首先针对直觉模糊信息系统定义了优势关系并研究其性质,给出相关的证明,然后定义了在该优势关系下直觉模糊信息系统目标集的上下近似集并证明其性质。接着分析了直觉模糊决策表的研究现状及其不足之处,提出了直觉模糊决策表的条件属性相对于决策属性的属性依赖度、属性重要度的概念,给出了相对属性约简与相对核属性的计算方法,最后通过实例表明所提方法的有效性和合理性。

英文摘要：

The dominance relation and the reduction method of the intuitionistic fuzzy information system （IFIS）is further investigated.Firstly,the dominance relation of IFIS is defined and the corresponding properties are researched and proved as well.Then,the upper and lower approximations of the target set of IFIS are given and the properties are also proved.Secondly,the current research status and deficiencies of the intuitionistic fuzzy decision table are analyzed,then the attribute dependency degree and attribute importance degree of the intuitionistic fuzzy decision table are proposed.Moreover,the methods of how to calculate relative attribute reduction and core attributes are proposed.Finally,a numerical example is given to demonstrate the effectiveness and rationality of the proposed method.