关键词: 区间值信息系统 相似水平 变精度相容关系 属性约简

Abstract: A new variable precision tolerance relation was defined in interval-valued information system by similarity grade of attribute＇ s interval-valued. Based on the variable precision tolerance relation, the problem of attribute reduction and the iudgment in i

Key words: Interval-valued information system, Similarity level, Variable precision tolerance relation, Attribute reduction