Knowledge reduction for incomplete information systems based on variable—precision rough set models

doi:10.3778/j.issn.1002-8331.2009.13.019

Computer Engineering and Applications ›› 2009, Vol. 45 ›› Issue (13): 65-67.DOI: 10.3778/j.issn.1002-8331.2009.13.019

• 研究、探讨 • Previous Articles Next Articles

Knowledge reduction for incomplete information systems based on variable—precision rough set models

ZHAO Ya-di,WEI Li-li

School of Mathematics and Computer Science，Ningxia University，Yinchuan 750021，China

Received:2008-03-19 Revised:2008-05-20 Online:2009-05-01 Published:2009-05-01
Contact: ZHAO Ya-di

基于变精度粗糙集的不完备信息系统知识约简

赵亚娣,魏立力

宁夏大学数学计算机学院，银川 750021

通讯作者: 赵亚娣

Abstract

Abstract: 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.

Key words: incomplete information system, variable-precision rough set, knowledge reduction

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。

关键词: 不完备信息系统, 变精度粗糙集, 知识约简

ZHAO Ya-di,WEI Li-li. Knowledge reduction for incomplete information systems based on variable—precision rough set models[J]. Computer Engineering and Applications, 2009, 45(13): 65-67.

赵亚娣,魏立力. 基于变精度粗糙集的不完备信息系统知识约简[J]. 计算机工程与应用, 2009, 45(13): 65-67.

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Knowledge reduction for incomplete information systems based on variable—precision rough set models

基于变精度粗糙集的不完备信息系统知识约简

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