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1、华东交通大学硕士学位论文本体粒及本体粒计算的研究姓名：范萍申请学位级别：硕士专业：计算机应用技术指导教师：黄兆华20080418AbstractSTUDYONONTOLOGYGRANULESANDONTOLOGYGRANULARCOMPUTINGABSTRACTAsaresearchpopularpoint，granular-computingtheoryattractivesmoreandmorepeopleovertheworld.Fuzzyset，RoughsetandQuotientspacearerecognizedasthreedifferentGrctheorie
2、s.Theyhavetheirownperspectivesinsolvingproblems，butallofthemhaveacommoncharacteristicthatconsidersproblemsindifferentlevelsandhasthesimilarofthinkinglikehumanbeing.Theadvanceofontologydecreasesandeliminatesconfusionofdomainconceptandterms，makingbaseofsystems，whichcommunicate，sharewithandmani
3、pulateeachother，anditsolvestheproblemofknowledge’sshareandreuse.Thisthesisproposesanewgranularcomputingmodel,ontologygranularspacemodel.Thebasicideaofthemodelisbasedonthehumanabilitythatis,peoplecanabstractorsynthetizetheknowledgeanddatarelatedtospecialtaskstodifferentdegreesorsizesgranules,
4、andaccomplishthetaskswiththehelpsofthegranulesandrelationsamongthem.Themainresearchesandcontributionsasfollows:(1)Wemainlydiscusstheissuesaboutthedefinitionofontologygranules,therelationsamongontologygranules,thecompositionanddecompositionofontologygranules,theformulatingofthemodels,modelcon
5、structingmethods,andthefeaturesandpropertiesofontologygranularmodels,etc.(2)Proposethegranularcomputingmodelbasedonontology.Themodelisconstructedbasedonontologysimilarrelations,anditiscomposedwithfourparts:ontologysystem,similarrelationsystem,transformationfunctionandnestedtolerancecoverings
6、ystem.Themainfeaturesofthemodelfocusonthedefinitionofontologygranulesandtheproblemsolvingmethodswiththehelpofthehierarchicalandnestedstructureoftolerancegranularspaces.(3)AnalgorithmnamedGrc-Searchforthemodelapplyingtothetextretrievalisdesigned,andexperientsillustratethatitcanreducebothtimec
7、omplexityandspacecomplexity.Basedonabovefruits,wehaveaconclusionaboutthetheoryandapplicationsofontologygranularspaces.Besides,someproblemsinthemodelandourfutureworksareproposed.KeyWords:Ontology,GranularComputing,OntologySimilarity,OntologyGranules
