摘要
基于变精度的思想,提出了一种新的不完备信息系统变精度粗糙集模型。基于该模型给出了不完备信息系统的β上(下)分布约简和β上(下)近似约简。给出了求解不完备信息系统β上(下)分布约简的辨识矩阵方法。
A new variable--precision rough set model for incomplete information systems is established based on variable rough sets models β upper (lower) distribution reduction and β upper (lower) approximate reduction are introduced for incomplete information systems.The methods for discernibility matrixes for β upper(lower) distribution reduction are also presented.
出处
《计算机工程与应用》
CSCD
北大核心
2009年第13期65-67,共3页
Computer Engineering and Applications
基金
国家自然科学基金No.60663003
宁夏自然科学基金项目(No.NZ0725)~~
关键词
不完备信息系统
变精度粗糙集
知识约简
incomplete information system
variable-precision rough set
knowledge reduction