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AGlobalTrustManagementModelforP2PNetworkAbstract:InP2Penvironment,allkindsofopen,dynamicandchangefulapplicationspostmoredemandsfornetworksecurityandrelia-bility.Basedonevaluationamongpeers,thispaperintroduceimprovedDHTtoestablishtrustmodeltoensuretheavailabilityoftrustin-formationandresolvehighmaintenancecostscausedbythejoinandexitofnodes,andthusenhancetheperformanceofthesystem.KeyWords:P2P;TrustManagement;Availability;DHT[4]ZhouGuoqiang,PanFangrui,ZhangWeifeng.ResearchProgressofTrustEvaluationModel[J].WuhanUniversityJournalofNaturalSc-iences.2008,13(4).[5]ISTOICA,RMORRIS,DLIBEN2NOWELL,etal.Chord:AScalablepeer-to-peerlookupprotocolforinternetapplications[J].IEEE/ACMTransactionsonNetworking,2003,11(1).[6],,,.DHTP2P[J].,2008(10).[7],,.[J].,2006(3).(:):(1982-),,,,;(1957-),,,、,、。,(,226001):,。,、、、Markov、,、,,。:;;:TP311.52:A:1672-7800(2009)05-0108-031,,,,,,,Delphi、、。,,,,。91.7%,。,,,,,,、、。2,,、,,。,,SoftwareGuide8%520095Vol.8No.5May.20095:、、、(Markov)、。,:①,,,;②,;③,;④,,。,,,,,。2.1,(),。、、。,,、,,。2.2,,,,。CeogreE.P.BoxGwil-vmM.Jenkins(B-JARMA)。AR-MA,,,d(ARMIA):Φ(B)·(1-B)dXt=Θ(B)αt,,ARMIA。2.3(Markov),,,。Markov,Markov,(,,,),。ts,t+1pSk,pSjSk,i,P(i)jk,P(i)=P(i)jki,j-1,…,n。,。1983~1997,,,,,1998。2.41982,,、,。,,、、,。GM(1,1),,,。,,,。GM(1,1)1971~1996,()。GM(1,1),,,,,,、。GM(1,N)、,N,,。2.5(ArtificialNeuralNetwork,ANN),,。,,。,,,。,,。BP,,BP。;,;。10,,BP,,87.5%,。BP,,,,、。,BP,,,,、BP。BP,:109··2009200920091;,,,,;,;,,;,,、,、、、,,,;,,。3,,,;,。1,。1,、、。,;,。,;;。,、、、;。,、、,,。,,,,,,、、,,。,1969BatesGranger,,,,。,,。4,4,、,。,BP,(、、),,BP。BP,,。:[1].[M].:,1994.[2],,.[J].,2003(12).[3],.[J].,2005(1).[4].[M].:,1992.[5].[M].:,1999.[6].Markov[J].,1999(4).[7].[M].:,2002.[8],.[J].,2008.[9],.[J].,1997(12).[10].、[M].:,2007.[11],.BP[J].,2008(3).[12],,.BP[J].,2006(14).(:)110··
本文标题:基于数学模型的疾病预测方法比较研究
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