欢迎来到天天文库
浏览记录
ID:34589086
大小:883.69 KB
页数:74页
时间:2019-03-08
《基于蚁群算法的非结构化p2p搜索技术的研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、AbstractPeer-to-peer(P2P)networkhasbecomeanimportantapplicationinInternet.P2PnetworkcollectstheresourceonthenodesattheedgeofInternettoprovidestrongcomputingpowerandstoragecapability.Becauseofitsflexibilityonquerypatternandadaptabilitytodynamicenvironment,unstructuredP2Pnetworkiswidelydeployedand
2、becomethemainstreamofthecurrentP2Pnetworks.However,unstructuredP2Pnetworkssufferfrompoorperformance,thereforeimprovingsearchingalgorithmisoneimportantmajorresearchareaforunstructuredP2Pnetwork.Unfortunately,existingP2Psearchingmechanismsareusuallydissatisfied.Forexample,structuredP2Psystemsareef
3、ficientbutlackofactualimplementsontheInternet,becauseoftheircomplicatedstructures.UnstructuredP2Psystemsareinefficientbutmorepopular.Fromvariousperspectives,ourworkfocusesonhowtoimproveretrievalefficiencyofunstructuredP2Pfile-sharingsystems.Inthispaper,wepresentanewapproachtoP2Pinformationretrie
4、val—ACODA,usingantcolonyalgorithmtosolvetheproblemsuchashugemessagepackets,lowsearchefficiency,redundancyroutesandothers.Thealgorithmsimulatestheprocessoftheants’searchingfoodandcandirectthequeryroutingefficientlyaccordingtothepositivefeedbackprincipleoftheantpheromone.Itsendsthequerymessagestot
5、heareawheretherecouldbetherequestedresourcestoimprovethesearchefficiency.Besides,informationrecommendationservicesbasedonACODAisintroducedinpaper.Thepeertransfersinformationperiodicallytootherpeersaccordingtotheirinterest.Bythismethoditcanraisethefile-sharinglevelandreduceblindsearches.Averify-r
6、enascencemethodisprovidedinpaperto万方数据improvetheperformanceofindexcaching.Thismethodcanefficientlysolvetheinvalidindicesproblemandits’expansionproblem.Itcanimprovethesearchefficiencybyincreasingthelifetimeofthevalidindex.ThesimulationbasedonPeerSimsoftwareshows,theinformationretrievestrategyofAC
7、ODAalgorithmwithinformationrecommendationservicesandindexcachingcanefficientlyreducethetimeoffindingtheresources.Itcanachieveabettersearchperformanceandlowthenetworkloadsbyincreasingtheresourcehitratioandreducingthequerymess
此文档下载收益归作者所有