摘要
比较知识库精细关系的两种不同定义,得出等价关系与划分、二元关系与覆盖、以及二元关系与覆盖约简之间的一些有趣联系;进而探讨这两种定义在粗糙集中对提高知识确定性程度的不同作用。这些结论将对基于粗糙集的不确定性研究提供一定的帮助。
This paper mainly compared the two definitions of finer relations in the knowledge bases,drawing some interesting conclusions on the equivalence relations and partitions,the binary relations and coverings,as well as the links of the binary relations and reductions of coverings.What＇s more,we discussed these two definitions＇ different functions of improving degree of certainty in the rough sets.All these conclusions will contribute to the research of the indetermination theory based on the rough sets.
出处
《模糊系统与数学》
CSCD
北大核心
2011年第2期138-145,共8页
Fuzzy Systems and Mathematics
基金
国家自然科学基金资助项目(10671173
10971186)
漳州师范学院科学研究项目(SK09019)
关键词
知识库
等价关系
划分
二元关系
覆盖
覆盖约简
确定性
Knowledge Base
Equivalence Relation
Partition
Binary Relation
Covering
Reduction of Covering
Degree of Certainty
