對等網(wǎng)絡小世界模型及其在文獻檢索中的應用研究.pdf

1、華中科技大學碩士學位論文對等網(wǎng)絡小世界模型及其在文獻檢索中的應用研究姓名：婁文申請學位級別：碩士專業(yè)：計算機技術指導教師：陳傳波20061104華中科技大學碩士學位論文AbstractThePeerto—Peer(P2P)networkisanetworktopologythatappliesequitypolicyIntheP2Pnetworkpeernodessimultaneouslyfunctionasboth”clients”

2、and”seIvel$”tOtheothernodesonthenetworkDuetoitslowcosthi曲scalabilityfaulttolerance，autonomyandselforganizingnature，P2PnetworkisbecominganidealplatformforliteratureinformationsharingAtpresentalmostallfile—sharingservicein

3、P2PnetworkcannotprovidecomentbasedqueryQuerytechniques，suchasconcentratedindex，queryfloodingandrandomwalk，needaccuratemetadatamatching，structuralP2Pnetworkbasedondislsibutedhashtablecallsupportkeyword／keyvaluequeryingonl

4、ythequalityofretrievalresetisdifficulttoguaranteeInordertoensurehi曲recallrateofinformationretrieval，itneedtosearchlargeamountsofnodes，whichresultsinheavynetworkloadThoughimprovingindexinformationofneighbornodesCanenhance

5、queryingperformance，updatingofindexinformationneedsverylargeextraexpensesContentbasedretrievalinP2PenvironmentisallemergingresearchdomainandonlyafewachievementshaveWenobtainedatpresentTheauthorintroducedthesmallworldphen

6、omenainsocietytoP2Pnetworks，andgaveaP2Psmallworldmodel，whichcombinedwithtraditionalinformationretrievaltechnique，obtainedstabilizingandhighqual崎retrievalresultsFirstsmallworldcharacteristicsforcomplexnetworksandpowerlaws

7、wasstudied，andthentopologyandinformationquerymeclmnicsforexistingP2Pnetworkwereanalyzedwhichprovidedtheoreticbasisforcon剜otlletingnewmodel，solvingliteratureretrievalproblemsSecondrelevanttechniquesforliteratureretrievala