摘要
区间值信息系统是单值信息系统的一种广义模型,通过引入变精度相容关系以及极大变精度相容类,提出区间值信息系统的属性约简与对象的相对属性约简。进一步,基于区分矩阵,定义一种区分函数与相对区分函数,得到计算区间值信息系统上属性约简与相对约简的具体操作方法。
Interval-valued information systems are generalized models of single-valued information systems. By introducing a variable precision tolerance relation and a kind of maximal variable precision tolerance class,this paper proposes the attribute reduction and the relative attribute reduction for its objectin intervalvalued information systems. Furthmore, the paper difines a kind of discernibility function and relative discernibility function based on the discernibility matrix, and get the means of computing the attribute reduction and relative attribute reduction of interval-valued information system.
出处
《模糊系统与数学》
CSCD
北大核心
2009年第6期126-132,共7页
Fuzzy Systems and Mathematics
基金
国家自然科学基金资助项目(60474022)
关键词
区间值信息系统
极大变精度相容类
属性约简
区分函数
Interval-valued Information System
Maximal Variable Precision Tolerance Class
Attribute Reduction
Discernibility Function