complex networks and decentralized search algorithms

complex networks and decentralized search algorithms

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時間:2019-02-27

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1、ComplexNetworksandDecentralizedSearchAlgorithmsJonKleinberg?Abstract.Thestudyofcomplexnetworkshasemergedoverthepastseveralyearsasathemespanningmanydisciplines,rangingfrommathematicsandcomputersciencetothesocialandbiologicalsciences.Asigni?cantamountofrecentworkinthi

2、sareahasfocusedonthedevelopmentofrandomgraphmodelsthatcapturesomeofthequalitativepropertiesobservedinlarge-scalenetworkdata;suchmodelshavethepotentialtohelpusreason,atagenerallevel,aboutthewaysinwhichreal-worldnetworksareorganized.Wesurveyoneparticularlineofnetworkr

3、esearch,concernedwithsmall-worldphe-nomenaanddecentralizedsearchalgorithms,thatillustratesthisstyleofanalysis.Webeginbydescribingawell-knownexperimentthatprovidedthe?rstempiricalbasisforthe“sixdegreesofseparation”phenomenoninsocialnetworks;wethendiscusssomeprobabili

4、sticnetworkmodelsmotivatedbythiswork,illustratinghowthesemodelsleadtonovelalgorithmicandgraph-theoreticquestions,andhowtheyaresupportedbyrecentempiricalstudiesoflargesocialnetworks.MathematicsSubjectClassi?cation(2000).Primary68R10;Secondary05C80,91D30.Keywords.Rand

5、omgraphs,complexnetworks,searchalgorithms,socialnetworkanal-ysis.1.IntroductionOverthepastdecade,thestudyofcomplexnetworkshasemergedasathemerunningthroughresearchinawiderangeofareas.ThegrowthoftheInternetandtheWorldWideWebhasledcomputerscientiststoseekwaystomanageth

6、ecomplexityofthesenetworks,andtohelpusersnavigatetheirvastinformationcontent.Socialscientistshavebeenconfrontedbysocialnetworkdataonascalepreviouslyunimagined:datasetsoncommunicationwithinorganizations,oncol-laborationinprofessionalcommunities,andonrelationshipsin?n

7、ancialdomains.Biologistshavedelvedintotheinteractionsthatde?nethepathwaysofacell’smetabolism,discoveringthatthenetworkstructureoftheseinteractionscanpro-videinsightintofundamentalbiologicalprocesses.Thedrivetounderstandall?SupportedinpartbyaDavidandLucilePackardFoun

8、dationFellowship,aJohnD.andCatherineT.MacArthurFoundationFellowship,andNSFgrantsCCF-0325453,IIS-0329064,CNS-0403340,andBCS-0537606.2JonKle

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