摘要
为了进一步有效处理不完备数据,本文将完备信息系统上的局部粗糙集理论扩展推广到不完备信息系统中,首先基于不完备信息系统的容差关系给出了局部粗糙集的定义,其次,研究了不完备信息系统上局部粗糙集的性质并基于不完备局部粗糙集给出了计算下近似的算法。最后,基于局部下近似的两部分,给出了不同的局部属性约简。
In order to further effectively deal with incomplete data,this paper extends the local rough set theory on complete information systems to incomplete information systems.Firstly,the definition of local rough sets is given based on the tolerance relationship of incomplete information systems.Secondly,the properties of local rough sets on incomplete information systems are studied,and the corresponding algorithms of finding local low approxi is designed.Finally,different attribute reductions are proposed based on two parts of the local lower approximation.
作者
刘瑶瑶
LIU Yaoyao(School of Computer Science,Xi'an Shiyou University,Xi'an 710065,China)
出处
《智能计算机与应用》
2019年第5期121-124,共4页
Intelligent Computer and Applications
关键词
不完备
局部粗糙集
属性约简
信息系统
incomplete
local rough sets
attribute reduction
information system
