摘要
利用限制容差关系和集对分析方法,分别给出了不完备信息系统(IIS)下对象依赖和属性依赖的定义,并将其应用于IIS约简,提出了利用基于限制容差关系的对象依赖进行对象约简和利用基于集对分析的知识依赖进行属性约简的方法以及相应的算法,以这些算法为依据进行约简得到了较好的结果.最后结合两个实例加以分析,验证这种限制容差关系模型和集对分析方法相结合的方法对处理IIS是合理有效的.
Data dependency is an important foundation of knowledge reduction and knowledge reasoning under incomplete information system （IIS）. This paper gives the definition of object dependency using limited tolerance relation under IIS, and the one of attribute dependency using set pair analysis. Then it brings forward the methods and the algorithms of object reduction according to object dependency and attribute reduction according to attribute dependency. By two examples, it is verified that the new method bonding limited tolerance relation and set pair analysis is reasonable and effective at last.
出处
《系统工程理论与实践》
EI
CSCD
北大核心
2007年第11期97-103,共7页
Systems Engineering-Theory & Practice
基金
江苏省高校自然科学基金(02KJA120001)
关键词
知识依赖
不完备信息系统
限制容差关系
集对分析
属性约简
knowledge dependency
incomplete information system
limited tolerance relation
set pair analysis
attribute reduction
