1、湖南大學(xué)碩士學(xué)位論文面向網(wǎng)絡(luò)學(xué)習(xí)的一種檢索模型研究姓名：謝桂芳申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：軟件工程指導(dǎo)教師：李仁發(fā)楊海余20061226面向網(wǎng)絡(luò)學(xué)習(xí)的一種檢索模型研究IIAbstractCurrentlytheindividuationElearningpatternisthemostsuitablefvastnumbersoflearnersthemostpopularElearningpattern.Oneofitsacteristic

2、sisexplationthatistosaylearnersobtainneedfullearningresourcesbytheirownqueststudyinthewk.Butwiththedevelopmentofinfmationtechnologytheweblearningresourcespresenttheirinfinitycomplexity.Thetraditionalkeywdbasedmatchedinfm

3、ationretrievaltechniquecantmeettheneedsoflearningactivitiesofindividuationcreativeoflearninghabitsfromwhetherthecoveringratetheretrievalaccuracyofresources.Thusthisdissertationconstructsasemanticbasedretrievalmodelputsfw

4、arda“cluster”basedRDFdynamicsemanticretrievalalgithmconsequentlysolvesthreebigproblems:missingcheckmismatchlowretrievalefficiencycausedbytraditionalinfmationretrievaltechnique.FirstthedissertationanalyzescomparesfourElea

5、rningpatternsconstructasemanticbasedretrievalmodelfindividuationElearningpatternaccdingtotheacteristicsoflearningresourcestheirretrievalrequirementsofindividualtionElearningpattern.Themodelincreasesasemanticrelationdatab

6、aseonthebasisofthetraditionalmetadatabasedresourceretrievalmodel.Themodelmakesuseoftheautomaticconstructedsemanticrelationdatabasetorealizesemanticexpansion(i.e.synonymyextensionintensionextendextensionextendparataxisext

7、end)ofElearningresourcesmetadata.Semanticrelationdatabaseisthecrucialpartofthemodel.Therefeamethodispresentedtoautomaticallyobtainingsemanticrelationdatabase.NextthedissertationintroducestheapplicationsofXMLRDF(S)inthewk

8、educationusesXMLRDF(S)tocarrythroughsemanticdeionfElearningresourcesmetadatasoastomakecomputercanunderstprocessthem.ThenthedissertationmainlypresentstheRDFdynamicsemanticretrievalalgithmonthebasisofitthedissertationputsf

9、warda“cluster”basedRDFdynamicsemanticretrievalalgithm.Inthesectionthedissertationdescribesindetailthemodelarchitectureof“cluster”basedsemanticP2Pwktheconstructionofsuperpeersemanticclustersearcharithmetic.Comparedthe“clu

10、ster”basedRDFdynamicsemanticretrievalalgithmwithiginalalgithmthemainvirtueofthe“cluster”basedRDFdynamicsemanticretrievalalgithmiswhenthequeryconditionmatcheswiththetargetresourcestorestrictthesearchrangetotheattributives