指代消解关键问题研究

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1、苏州大学博士学位论文指代消解关键问题研究姓名：孔芳申请学位级别：博士专业：计算机应用技术指导教师：钱培德20090501中文摘要指代消解关键问题研究的方法大大提高了英文指代消解的性能，特别是当前句代词消解的性能。同时，在ACE2005中文语料中的实验表明，基于树核函数的方法同样大大提高了中文指代消解的性能，这表明结构化信息对指代消解而言是非常重要的，而且是语言无关的。第三，指代消解中待消解项的自动识别研究。探讨了基于规则、平面特征和树核等三种待消解项识别方法，并将这三种待消解项识别方法分别应用于指代消解，通过对实验数据的分析阐述了待消解项识别对指代

2、消解的作用。关键词：指代消解；中心理论；语义角色；树核函数；待消解项识别Ⅱ作者：孔芳指导教师：钱培德ResearchofKeyIssuesinCoreferenceResolutionAbstractWiththerapiddevelopmentoftheInternetandcomputertechnologies，variouskindsofinformationhavebeenincreasingexplosivelyandthedemandforpreciselylocatedinformationgivesastrongimpetusto

3、theNLPresearch．AsanimportantandhotresearchtopicinNLP,coreferenceresolutionplaysacriticalroleinmanyNLPapplications，suchastextsummarization，machinetranslation，informationextractionandmulti．1anguageinformationprocessing．Meanwhile，coreferenceresolutiondependsheavilyondiverseNLPtec

4、hniques，includingpart·of-speechtagging，namedentityrecognition，syntacticparsingandsemanticanalysis，andlSthuschallenging．Ast11ebasisofthisresearch，astate-of-the。砌coreferenceresolutionplatformiSfirstbuilt．Then，somekeyissuesincoreferenceresolutionareaddressedentensivelyfrombothsyn

5、tacticandsemanticperspectives·Fhecontributionofthisresearchliesin：1．Centeringtheory．basedcoreferenceresolution，withfocusonhowtoextendtheCenteringTheoryfromthegrammarticallayertothesemanticlayerviasemanticroles．Inaddition，threerelatedsetsoffeatures，i．e．semanticrolefeatures，pron

6、ominalrankingfeaturesandpronominalsubcategoryfeatures，areemployedtoexploretheimpactoftheCenteringTheory-drivenfeaturesincorefe：renceresolution·Experimentation011theACE2003Englishcorpusshowsthatsuch2．features。’’’’。)vetheSlgnltlcantlyimproveresolution，particularlyforpronounshows

7、thatsuchfeaturesbenefitperformanceofcoreferenceresolution．Meanwhile，italsobothshort-rangecoreferenceresolutionandlong．-rangecoreferenceresolution．Treekemel．basedcoreferenceresolution，withfocusonexploringvarioustreestructurestocapturestructuralinformationinparsetrees，III英文摘要指代消

8、解关键问题研究includinga)inclusionofsyntacticdescriptiveinformationa