Web搜索与Web缓存的若干关键问题研究

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1、复旦大学博士学位论文Web搜索与Web缓存的若干关键问题研究姓名：王晓宇申请学位级别：博士专业：计算机软件及理论指导教师：周傲英20030418We搜索与Web缓存的若干关键问题研究摘要Peer-to—Peer结构下的自配置Web缓存共享系统。该系统的网络的拓扑结构可以依据节点的兴趣而被自调整。同时，系统实现了一种新颖的路由策略，这种策略是基于节点缓存内容相似度的。另外，系统还采用了一种基于相似度的自适应跳步策略(self-adaptablehoppingstrategy)。关键词：Web搜索，链接结构分析，主题萃取，Peer-

2、to—Peer，Web缓存We搜索与Web缓存的若干关键问题研究摘要AbstractInthecominginformationage，theWorldWideWebhasbeenbecominganimportantplatform，onwhichpeoplepublishandobtaintheirinformation．FromtheviewpointofinformationconsumingintheWWW：itiSmoreandmoreimportanttoeffectivelysearcht11eimformati

3、onintheenvironmentofWWW．Topicdistillationandexplorationaretwokeytechniquesinthiscontext．Thefirstpartofthisdissertationfocusesontheimprovementoftopicdistillationandexplorationwiththeaidofthelinkageanalysis．BasedonthesurveyofcurrentlinkageanalysisapplicationontheWbbsea

4、rchfield．asimilarity-basedmodelonlinkageanalysisisproposedandanalgorithmframeworkoftopicdistillationandexplorationisdevelopedbasedonthemodel．FromtheviewpointofinformationsupplyintheWWW：reducingbandwidthandavoidingboric—neckbecomekeyproblemsinthestudyofWWWapplications

5、．Webcachingbecamethepopularappliedtechniqueinsuchacontext．ThesecondpartofthisdissertationstudiesthePeer-to—PeercomputingmodelandproposesaW-ebcachingsystembasedonthearchitectureofPeevto—Peer．Themaincontributionsofthisdissertationareasfollows：1．Asurveyofthelinkage—anal

6、ysisanditsapplicationonW曲searchispresented，andthefutureresearchdirectionsinthisfieldarealsogiven．2．Asimilarity-basedmodelonthelinkageanalysisisproposed．Thismodelcouldbeemployedtoobservetheprocedureofthelinkage—basedtopicdistillation．Itprovidesthetheoreticalbasisofimp

7、romentfortopicdistillation．3．Onthebasisofthesimilaritymodel，thealgofithmframeworkonthetopicdistillationandexplorationisproposed，whichcanimprovethequalityofdistillationusingonlytheinformationof、辘搜索蔚Web缓存的若干兼键简题研究穗豢hH，ertinks．Furthermore，italsoenablesend-userstosearchl

8、esspopulartopicswhenmulti-topicsareinvolvedinqueries。4．Onthebasisofaself-configurablePeer-Peercomputingmodel，aself-configurablewebc