欢迎来到天天文库
浏览记录
ID:39402554
大小:242.00 KB
页数:70页
时间:2019-07-02
《基于概念匹配度模型的文献检索系统》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、西南交通大学硕士学位论文基于概念匹配度模型的文献检索系统姓名:李静申请学位级别:硕士专业:应用数学指导教师:宋振明20090101西南交通大学硕士研究生学位论文第1I页AbstractInthetraditionalmanualdocumentretrieval.theindexingandretrievalofscientificdocumentsaredonemanually.Withincreaseinthenumberofelectronicdocuments,manualdocumentretrievalhasmanylimits,wemustusecomputerstopr
2、ocessthislargenumberofdocumentsSOthatwecanincreasethenumberandthespeedofdocument—processing.InformationRetrievalSystemhasbeenmadealargedevelopmentandprogressfordecades,InformationRetrievalSystembasingonfromeasy-to—useBooleanSearchModel,theVectorSpaceModeltotheProbabilityModel,whichincreasestheac
3、curacyofInform.ationRetrieval.ButdifferentInformationRetrievalSystemshavedifferentperformancesfordifferentdocuments。ItisveryusefulandnecessarytomakeexistingretrievalsystemsadapttotheChinesescientificdocumentsinordertoimprovetheaccuracyofInformationRetrieval.Howtoimprovepagerepresentationtomaketh
4、eactualcontentofthepagemoreaccurateandhowtoimprovethematchingmethodbetweendocumentanduser’Squery,arerelatedtothepreciserateofdocumentsearching.ThispaperanalyzethedocumentrepresentationfromtheConceptLatticetheory,throughmappingthequeryandreturningdocumentstotheontology,wecanstructuretheConceptLat
5、ticefromtheircommonbackground,thenweusetheConceptualMatchingDegreecalculatingthedegreebetweentheconceptofthequestionandanyothertheconcept.Finally,wesortthedegreeinaccordancewiththematchingdegree,SOthattheanSWercallmeettheusersquery.ThisisaDocumentRetrievalSystembasedonthemodelofConceptualMatchin
6、gDegreeinChapter3.Takingintoaccountadocumentusedasanobject,akeywordasanattributeoftheconcept,ifweestablishasinglelarge—scaleConceptLatticeforthewholesetofdocuments,therewillexistcomplexalgorithmsandlargemovingexpensesamonglattices.Therefore,thispaperalsomakesaDocumentRetrievalSystembasedonthemod
7、elofConceptLatticeMatchingDegree.西南交通大学硕士研究生学位论文第llI页Examplesshowthattheimprovedmodelmatchesmorewiththethinkingofhuman’Sthoughtandwithpeople’Sunderstanding.Thismodelisfeasible.KeywordsConceptLattice;DocumentRetrievalSystem;C
此文档下载收益归作者所有