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基于优势关系下不协调目标信息系统的知识约简
引用本文:徐伟华,张文修.基于优势关系下不协调目标信息系统的知识约简[J].计算机科学,2006,33(2):182-184.
作者姓名:徐伟华  张文修
作者单位:西安交通大学理学院信息与系统科学研究所,西安,710049
基金项目:国家重点基础研究发展计划(973计划)
摘    要:在基于优势关系下不协调目标信息系统中引入了分配约简和近似约简的概念,并讨论了它们二者之间的关系,进一步给出了知识约简的判定定理和辨识矩阵,从而提供了在优势关系下不协调目标信息系统知识约简的具体操作方法。

关 键 词:粗糙集  信息系统  知识约简  辨识矩阵

Knowledge Reductions in Inconsistent Information Systems Based on Dominance Relations
XU Wei-Hua,ZHANG Wen-Xiu.Knowledge Reductions in Inconsistent Information Systems Based on Dominance Relations[J].Computer Science,2006,33(2):182-184.
Authors:XU Wei-Hua  ZHANG Wen-Xiu
Abstract:Knowledge reduction is one of the most important problems in rough set theory.However,most of informa tion systems are not only inconsistent,but also based on dominance reiations because of various factors.To acquire brief decision rules from inconsistent systems based on dominance relations,knowledge reductions are needed.The main aim of this paper is to study the problem.The assignment reduction and approximation reduction are introduced in inconsis- tent systems based on dominance relations,and relationships between them are examined.The judgment theorem and discernable matrix are obtained,from which we can provide new approach to knowledge reductions in inconsistent sys terns based on dominance relations.
Keywords:Rough set  Information system  Knowledge reduction  Discernibility matrix
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