Knowledge reduction of set-valued information system based on variable precision tolerance relation

Computer Engineering and Applications ›› 2008, Vol. 44 ›› Issue (9): 27-29.

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Knowledge reduction of set-valued information system based on variable precision tolerance relation

CHEN Zi-chun^1,2,QIN Ke-yun¹

1.Department of Mathematics，Southwest Jiaotong University，Chengdu 610013，China
2.School of Mathematics and Computer，Xihua University，Chengdu 610039，China

Received:2007-10-22 Revised:2007-12-24 Online:2008-03-21 Published:2008-03-21
Contact: CHEN Zi-chun

集值信息系统基于变精度相容关系的知识约简

陈子春^1,2,秦克云¹

1．西南交通大学理学院，成都 610013
2．西华大学数学与计算机学院，成都 610039

通讯作者: 陈子春

Abstract

Abstract: A new variable precision tolerance relation is defined in set-valued information system by tolerance grade of attribute’set-valued，based on the variable precision tolerance relation the problem of knowledge reduction and the judgment in decision consistent set-valued information system are studied，and the influence of tolerance level on knowledge reduction are discussed.

Key words: decision consistent set-valued information system, tolerance grade, variable precision tolerance relation, knowledge reduction

摘要： 借助于属性集值的相似程度在集值信息系统上定义了一种变精度相容关系，给出了这种变精度相容关系下目标协调集值信息系统的知识约简与判定，并讨论了相容水平对目标协调集值信息系统的知识约简的影响。

关键词: 目标协调集值信息系统, 相容水平, 变精度相容关系, 知识约简

CHEN Zi-chun^1,2,QIN Ke-yun¹. Knowledge reduction of set-valued information system based on variable precision tolerance relation[J]. Computer Engineering and Applications, 2008, 44(9): 27-29.

陈子春^1,2,秦克云¹. 集值信息系统基于变精度相容关系的知识约简[J]. 计算机工程与应用, 2008, 44(9): 27-29.

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Knowledge reduction of set-valued information system based on variable precision tolerance relation

集值信息系统基于变精度相容关系的知识约简

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