基于本体的知识管理系统关键技术研究

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1、Yl的1449分类号：!￡3密级：——单位代码：!Q§12学号：2111111Q§§西北大学博士学位论文题目：基主查堡鲍盘丛篁垄壅丝苤鳇垫查壁窒指导教师——壑室遗专业技术职务鏊撞学科(-9,Jk)盐簋扭丛鲑墨堡盈——答辩日期学位授予日期二oo七年四月AbstractIntheageofknowledgeeconomy,knowledgemanagementhasbecomeanimportantmeansinenhancingthecompetitionpowerofanorganization．Aknowledgemanagementsystem(KMS)mustsupportthea

2、ccumulation,storing,spreading，mtercommunion，sharing,andconstantlyevolutionoftheorganizationalknowledge,SOastosupporttheknowledgeinnovationactivitiesoftheorganization'sknowledgeworkersall-aroundly．KMShasmanycharacteristicsdifferentfromthetraditionalAIsystemandMIS，thereforeneedasystematicallystudyf

3、romanewpointofview．ThekeytechniquesforKMSarestudiedinthispaper,witchinvolvingthearchitectureofKMS，OntologybasedmodelingofKnowledgeBase,usermodelandthe'techniquesforactiveserviceofknowledgeandthesecurableaccessmodelsofknowledge．Themaincontributionsoftheresearchareasbelow：1．Basedonanalyzingthechara

4、cteristicsofKMSandthedevelopingtrendofmodemsoRwarearchitectme，aevolvableandservice-orientedKMSarchitecture饵SOKMA)isproposed，whichCansupporttheevolutionofKMS，distributedmassKB，knowledgesharing,knowledgeservicesandtheintegrationofdifferentsystems．2．AnOntologybasedknowledgebasemodelfornonstructuralk

5、nowledgeispresented，whichCansupporttheaccumulationofknowledgeandtheretrievingofnonstructuralknowledgeimplementedwithmulti—mode．3．Fromtheepistemologicalpointofview,anewideasofcaseknowledgemanagementmechanismcalledcBR2isproposed．whichshouldsupportboththecomcnboficntedcaseknowledgeretrievalandthecas

6、ebasedreasoning，furtherIImore,allOntologybasedmodelofcaseknowledgebaseispresented．4．AnOntologybasedusermodelisproposedⅡⅡ-onghanalyzingthecharacteristicsofthecun∞：US‘．fmodel，whichgivesasolutionfortheproblem。of虬。urcentusermodel．5．Basedontheresultsofanalyzingthecharacteristicsoftheaccesscontrolmodel

7、UCONandthesecurityrequirementoftheKMS，AnOntologybasedaccessingcontrolmodelOUCONisproposed．Themainresultsoftheresearchhavebeenappliedinrealisticsystemsrespectively，whichhavebeenprovedfeasibleforpractical．Keywords：knowle