基于本体的不确定性知识管理研究

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1、中国科学院计算技术研究所博士学位论文基于本体的不确定性知识管理研究姓名：程勇申请学位级别：博士专业：计算机软件与理论指导教师：史忠植20050601中国科学院研究生院博士学位论文请求方注册到注册中心，主体遵循知识服务协议进行交互完成所代表用户指定的知识服务任务．基于上述工作，我们实现了一个面向语义的多主体知识管理系统KMSphere原型系统。整个系统分为三大部分，分别是本体工程和本体学习工具OntoSphere，主要负责语料分析、本体学习、本体编辑和本体映射等功能。其次是知识库OntoBase，根据不同的领域可以建立相应的领域知识库，即OntoBase实例。最后是OntoPor

2、taI／OntoServiees，前者提供基于Web的知识查询服务，后者则支持应用级知识利用。关键词：知识管理、本体、不确定性、知识服务，多主体系统HResearchOnOntology-basedUncertainKnowledgeManagementABSTRACTRESEARCHONONTOLOGY—BASEDUNCEftTAINKNOWLEDGEMANAGEMENTYONGCHENG(ComputerSoftware&Theory)SupervisedbyProf．ZhongzhiShiABSTRACTTheknowledgeeconomyageisuponu&Now,

3、knowledgeisendowedwiththenewrole嬲therefillofnaturalresollrces，capitalandlabor,andbecomesoneoftheprimaryd由i119factorsforsocialdevelopment．Obviously,themanagementmodeandtheoryforknowledge疵urgentlyrequiredinaccordwiththeknowledgeeconomy．Fororganizationsandenterprises,knowledgeiscomingintobeing∞

4、astrategicresourcewithgreateconomicvalues．InknowledgecIlgincedo舀ontologiesprovideaneffectivemesnstodescribetheconceptmodelandstructufedomainknowledge．Withthisbackgroundinmind,thethesisismainlydealtwithontology-basedknowle电emanagement,especiallyinopenuncertainenvitonment．Severalissuesareaddre

5、ssed∞follows：(I)RepresentationandqueryofuncertainknowledgebasedOrlontologyTheenvironmente岳web,markets)，inwhichorganizationsandenterprisesRtesituated,isoftenopen,aymmicanddistributed．Theknowledgerehtedtothiscontextisoftenuncettain,SOthatitcan'tbens姆representedbytraditionalontologymodeJingmeth

6、odsandmodemdescriptionlogic—basedontologyla：哩咿becauseoftheirinnerdeficiency．Inordertoovercomethisproblem,weextendmoderndescriptionlogicsbyintroducingprobabilitytodescribethedependencerelationsbe协eenconceptsindomainandBayesianNetworktoinfertherehtion&Wealsoextendtheknowledgequerymechamsmandpr

7、ovidesupportforuncertaml【ndWledg。，(2)Asemi-automaticmethodforontologyacquisition．Intraditionalknowledgeengining,knowledgeismainlyacquiredmmluaI魄whichresultsinnotonlylowefficiencyandh电ecost,butalso$orncseriominconsistencyandvariouserro拖Weproposeasem