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1、HEBEIUNIVERSITY密級:分類號:學(xué)校代碼:10075學(xué)號:20121026碩士學(xué)位論文相容粗糙模糊集模型學(xué)位申請人:張垚指導(dǎo)教師:翟俊海教授企業(yè)導(dǎo)師:張素芳副教授學(xué)位類別:工程碩士專業(yè)領(lǐng)域:計算機(jī)技術(shù)授予單位:河北大學(xué)完成日期:二〇一五年五月ClassifiedIndex:CODE:10075U.D.C:NO:20121026ADissertationfortheDegreeofMasterToleranceRoughFuzzySetModelCandidate:ZhangYaoSupervisor:Prof.ZhaiJunhaiAdvis
2、orinEnterprise:A.P.ZhangSufangAcademicDegreeAppliedfor:MasterofEngineeringSpecialty:ComputerTechnologyUniversity:HebeiUniversityDateofAccomplishment:May,2015摘要摘要在粗糙模糊集模型中,被逼近的目標(biāo)概念是一個模糊集,使用的知識是等價關(guān)系,即描述對象的屬性是離散值的。但在很多實(shí)際應(yīng)用中,描述對象的屬性是實(shí)數(shù)值的。本文研究了能夠處理實(shí)數(shù)值屬性數(shù)據(jù)集的粗糙模糊集模型,主要工作包括:(1)將粗糙模糊集模型中
3、的等價關(guān)系推廣為相容關(guān)系,提出了相容粗糙模糊集模型。(2)討論了該模型的性質(zhì),給出了一些性質(zhì)的證明。(3)討論了該模型的數(shù)字特征,提出了一個基于屬性重要度的約簡算法。另外,還討論了粗糙模糊集模型與其它模型之間的關(guān)系,當(dāng)相容關(guān)系退化為等價關(guān)系時,相容粗糙模糊集模型即為粗糙模糊集模型,相容粗糙模糊集模型擴(kuò)展了粗糙模糊集的應(yīng)用范圍。關(guān)鍵詞粗糙集模糊集粗糙模糊集相容粗糙集相容粗糙模糊集AbstractAbstractInroughfuzzysetmodel,theapproachedtargetconceptisafuzzyset,theknowledgeus
4、edforapproachingthetargetconceptisequivalencerelation,inotherwords,theattributesusedforrepresentingtheobjectisofdiscretevalue.However,inmanypracticalapplications,theattributesusedforrepresentingtheobjectisofrealvalue.Aroughfuzzysetmodelnamedtoleranceroughfuzzysetwhichcandealwith
5、datasetswithreal-valuedattributesisinvestigatedinthispaper,themainworksinclude:(1)Theequivalencerelationinroughfuzzysetmodelisextendedtotolerancerelation,andthetoleranceroughfuzzysetmodelisproposed.(2)Thepropertiesoftheproposedmodelarestudied,theproofsofsomepropertiesaregiven.(3
6、)Thequantitativecharacteristicsoftheproposedmodelarediscussed,anattributereductionalgorithmbasedonsignificanceispresented.Inaddition,therelationshipsbetweentheproposedmodelandotherrelatedmodelsarealsodiscussed,whenthetolerancerelationisdegeneratedintoequivalencerelation,thetoler
7、anceroughfuzzysetmodelbecomestheroughfuzzysetmodel.Toleranceroughfuzzysetmodelextendstheapplicationofroughfuzzyset.KeywordRoughsetFuzzysetRoughfuzzysetToleranceroughsetToleranceroughfuzzyset.目錄目錄第1章緒論...............................................................................
8、.........................................11.1研究