基于地理本體的信息檢索.pdf

1、安徽大學碩士學位論文基于地理本體的信息檢索姓名：葉密申請學位級別：碩士專業(yè)：計算機軟件與理論指導教師：鄭誠201004AbstractIIAbstractWiththerapiddevelopmentofinfmationtechnologywkhasbecomeamainmeansofobtaininginfmation.Itbringsconveniencetopeopleatthesametimealsobringssometro

2、ubles.Asinfmationinwkisverylargepeopleoftenspendalotoftimetosearchfusefulinfmation.Whenpeopletravelabroadtheyaren’tfamiliartofooddrinkhousingwalkinginanunfamiliarurbanenvironment.Sosomegeographicalinfmationisretrievedsuc

3、hasbusstationsbuslinesinquirysoon.Relativetripguidanceisobtainedbywkfconsultingusefulinfmation.Becausecurrentlysearchengineisbasicallybasedkeywdsprecisematchingretrievalalgithmsthequeryresultsareredundantusefulinfmationc

4、annotbeclearlyfound.Thisisclearlyunsatisfactyuser’sloyaltysatisfactionaboutsearchenginewillbegreatlyreduced.Ontologyasanewmethodofsemanticmodelismainlyusedfknowledgesharinginteractionreuse.Ontologyhasagoodconceptofhierar

5、chylogicalreasoning.Semanticretrievalwhichisbasedontheontologyisachievedbytheconceptofontologyconstructionlevelswhichestablishestheconcepttheconceptofrelationshipsbetweenattributesbyusingontologyfindsuncertaintyindirecti

6、nfmationimplicitinbetweenconceptthuscanrealizethesemanticintelligentinfmationretrieval.Inthisthesiscurrentstatusdeficienciesofinfmationretrievalareanalyzedfirstlyontologyrelatedtechnologiesareintroducedthebasicconceptsof

7、ontologydeionlanguageconstructionmethodsareexplained.Ontologyofgeographicalinfmationindomainontologyisbuiltbythetoolofprotg.Thespecificityofgeographicontologyisdescribedmeanwhilethespecialspacefeaturesingeographicalontol

8、ogyareexpressedbyOWLlanguage.Atthesecondplaceseveralkeykindsofspatialrelationsaredescribedfuzzysetsareintroducedintodistancerelationsinspatialrelationsthenthemembershipfunctionsaboutdistanceconceptconstructedwhichcanexpr