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1、重庆大学硕士学位论文II英文摘要ABSTRACTTheinflationofnetworkdataandtherapiddevelopmentofinformationtechnologybringhugeopportunitiesandchallengestotheeducationindustry.AsthenetworkelectronicLearning(E-Learning)becomesanewstudymethod,intheopeningdistributednetworkenvironment,themassoflearningresourcesdescription,man
2、agementandretrievalbecomesresearchhotspot.But,becausethatthereisnouniformstandardforeducationresourcedescriptionanddescriptionstructureofsubjectknowledgecausesresourcesdiscreteanddifficulttoshareandcannotunderstandresource,knowledgeandrelationsamongthemsemantically.Inaddition,becauseofthelackofseman
3、ticallyunderstandingofkeywordsintraditionalfulltextsearchmodebasedonkeywords,theretrievalresultsoftencontainmuchirrelevantinformation,andthesearchmodecannotestablishqueryonthenon-textlearningresources.Semanticandontologyhasbecomeanewmethodforknowledgeanddatarepresentationsincetheproposingofsemanticw
4、eb.AccordingtotherequirementsandsomeexistingproblemsinE-Learningapplications,itissuitabletouseontologytechnologyforsubjectknowledgerepresentingandinstructionalresourcedescription,andtocarryoutretrievallearningresourcesthroughasemanticway.ThisisalsoanimportantdevelopmentdirectionforE-Learning,theoret
5、icallyandpractically.Inthispaper,westudiedthesemanticWeb,ontology,semanticqueryexpansionandsemanticdataretrievaltechnology,andproposedtheknowledgehierarchicalmodelwithknowledgepointastheunitthroughcarefulanalysisonsubjectknowledgedescription,theknowledgestructureandtheknowledgerelationship.Thedomain
6、knowledgeontologyforthecoursedatastructurehasbeenconstructedbasedonthemodeltoscientificallyorganizethesubjectdomainknowledge.Inreferencetothedomesticandforeignrelevantlearningresourcesmetadatastandards,thoughtheconstructionofinstructionalresourceontologyonthebasisofCELTSlearningobjectmetadatastandar
7、d,theconnotationandextensionofthelearningobjectsandtherelationshipwithsubjectknowledgeunitshasbeendiscovered.Insemanticweb,thequeryextensionmethodbasedonontologyhasbeenproposed.Firstly,thismethodextra
