基于html的web就业信息抽取技术分析

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1、ABSTRACTWiththeincreasingubiquityofthecomputerandInternet,ithasbeenbecominganimportantchannelforPeopletoseareehforinformation.Asanenormousdatasource,retrivinginformationfromWebisoneofthehotpointsintheinformationstudyfieldnow.Withthecollegeenrollmentinourcountryhasbeenexpandingeachyears

2、,whichgivesthestudenteducationandemploymentmanypressures.Wehopetoobtainalargeamountaboutemploymentinformationfrominternet,whichhasbeenprovidedguidingsignifieancetospecialtyconstructionandstudentemployment.ThemostofthismasswebdataofinternetarebasedonthesemistructuredHTMLformat.Thetextba

3、seonHTMLstructureisnotstrictlyandthesemanticsisnotclear.Peoplecan'tfindtherequireddataquicklyandaccuratelyfromthewebdata,howtoquicklyandaccuratelyobtainthesedataisaurgentproblemneedtoresolve.SointhispaperitpresentsanewmodelbasedonHTMLstructurethatextractsinformationfromwebemploymentinf

4、ormation.ItiscomposedofHTMLstructurepretreatmentmodule,tablepositioningmoduleandinformationextractionmodule.Thefirst,JtidyisusetocleantheWebPagecodewhichisconvertedintoXMLdocuments.ThentheDOMtreeofWebinformationisfoundintheanalysisofXML.Inthelast,Throughalargenumberofobservation,weobta

5、intheheuristicrulesaboutlocatethepositonofthegenuinetableandalgorithmsaredesignedandimplemented.Thispaperconsiderssuchlayouttypeasthecross-rowandcross-columninstance,whichmakeeachdataunitandthecorrespondingpropertynotcorresponded,sotablesarestandardizedsothateachroworcolumnarealignedwi

6、ththesamenumberofcells.TheexperimentalresultsperformedonmultipleWebsitesshowedII万方数据thattheapproachforWebdataextractioncouldextractemploymentinformationinWeb.ItcanbeappliedinextractsemploymentinformationfromWebandotherfurtherstudyandperformwell.KeyWords:InformationExtraction，HTML，DOMtr

7、ee，WebtableIII万方数据目录摘要..............................................................IABSTRACT...........................................................II第一章绪论.........................................................11.1研究背景及意义...............................................11.1.1研究背景