区间值信息系统与形式背景的约简及其应用.pdf

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êÆ[WilleÑü?nêâêÆnØ.{²20õu,Ø=nØþõ,3ûü©Û!&Eu¢!y©Ûõ+p¤õA^.©̤#:Xe:•ïÄ«m&EXÚá5{,Ñ

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5、CVgSºk=ká5Ú"þCVgòk=ké,3/ªµ¥ÏE£á58ÚE£á5Ý,©¥Ñ«#ká5{{.'o÷8;«m&EXÚ;ëYêûü&EXÚ;'éÝ;E£Ý;Vg;{;ûüiAbstractRoughsetandFormalconceptanalysis,respectivelyproposedbyPawlakandWille,aretwomathematicaltheoriestoanalysisdata.Inthepasttwentyyears,thetwotheoriesnoto

6、nlygetin-depthstudiedbutalsoappliedbroadlyindecisionanalysis,informationretrievalandportfolioanalysis,etc.Inthispaper,themainresultsandinnovationsaresummarizedasfollows:•Attributereductionisstudied,methodsofattributereductionandeachobjectclassificationreduct

7、ionbasedondominancerelationareinvestigatedininterval-valuedinformationsystem.Asubsetisselectedfromobjectsininterval-valueddecisioninfor-mationsystems.Forconsistentinterval-valueddecisioninformationsystem,weobtainaattributereduciblemethodthateachdecisionrule

8、ofthesubsetisunchangedafterattributereduction.Forinconsistentinterval-valueddecisioninformationsystem,wegetaattributereduciblemethodthateachpossibleoruniformdistributionfunctionisunchangedforeachobjectinthesubsetafterattributereduction.•Forconsecutivegrayde

9、cisionsystem,wegetamethodwhichbasedonattributereductionandgrayrelationalgrade.Briefruleisobtainedbyattributereductionindecisionsystems.Theattributesofthebriefrulearetreatedasevaluationindicatorsandtheb