Rough set extensions in incomplete information systems

查看全文 作　　者：Guoyin [1,2]WANG;Lihe [1,3]GUAN;Feng [1,2]HU

机构地区：[1]School of Information Science and Technology,Southwest Jiaotong University,Chengdu 610031,China;[2]Institute of Computer Science and Technology,Chongqing University of Posts and Telecommunications,Chongqing 400065,China;[3]Institute of Information and Calculation Science,Chongqing Jiaotong University,Chongqing 400074,Chin

出　　处：《Frontiers of Electrical and Electronic Engineering in China》索引2008年第3卷第4期,共7页

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.60573068,60773113);the Program for New Century Excellent Talents in University(NCET),and the Natural Science Foundation of Chongqing of China(No.2008BA2017). 摘　　要：All eight possible extended rough set models in incomplete information systems are proposed.By analyzing existing extended models and technical meth-ods of rough set theory,the strategy of model extension is found to be suitable for processing incomplete information systems instead of filling possible values for missing attributes.After analyzing the definitions of existing extended models,a new general extended model is proposed.The new model is a generalization of indiscernibility relations,tolerance relations and non-symmetric similarity relations.Finally,suggestions for further study of rough set theory in incomplete informa-tion systems are put forward. 关键词：rough set incomplete information system extended model

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Rough set extensions in incomplete information systems

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