简介:Basedonuser’sin-degreedistribution,traditionalrankingalgorithmsofuser’sweightusuallyneglecttheconsiderationsofthedifferencesamonguser’sfollowersandthefeaturesofuser’stweets.Inordertoanalyzethefactorswhichimpactonuser’sweight,undertheanalysisofthedatacollectedfromSINAMicroblognetwork,thispaperdiscoversthatuserinfluenceandactivedegreesarethedominantfactorsforthisissue.Theproposedalgorithmevaluatesuserinfluencebyuser’sfollowernumber,theinfluenceofuser’sfollowersandthereciprocitybetweenusers.User’sactivedegreeismodeledbyuser’sparticipationandthequalityofuser’stweets.Themodelsaretestedbydifferentdatagroupstoconfirmtheparametersforthefinalcalculation.Eventually,thispapercomparesthecomputationalresultswiththeuser’srankingordergivenbytheSINAofficialapplication.Theperformanceofthisalgorithmpresentsastrongerstabilityonthefluctuantrangeofthevalueofuser’sweight.
简介:Theuser-computerinterfaceforcolorselectionisofgreatsignificancefortheuseofcolorsincomputergraphics,particularlyinsomefieldswheretheusedcolorshavetobeselectedcarefully.Thispaperdiscusseswhatfactorshavetobeconsideredtodesignaneffectiveuserinterfaceforcolorselec-tion.Italsopresentsamethodwhichshowshowtorepresent3Dcolorspacesaccordingtothepsychol-ogyofcolorperception.Twoexamplesofuserinterfaceforcolorselectionaregiven.OneisbasedontheCLELUVuniformcolorspace,theotherisbasedonRGB-rotatedcolormodel.
简介:Multi-cellmulti-usermultiple-inputmultiple-output(MC-MU-MIMO)isapromisingtechniquetoeliminateinter-userinterferenceandinter-cellcochannelinterferenceinwirelesstelecommunicationsystems.AsthelargenumberofusersinthesystemandthelimitednumberofsimultaneouslysupportableuserswithMC-MU-MIMO,itisnecessarytoselectasubsetofuserstomaximizethetotalthroughput.However,thefullycentralizeduserselectionalgorithmsusedinsinglecellsystem,whichwillincurhighcomplexityandbackhaulloadinmulti-cellcooperativeprocessing(MCP)systems,arenotsuitabletoMC-MU-MIMOsystems.ThisarticlepresentsatwocascadeduserselectionmethodforMCPsystemswithmulti-cellblockdiagonalization.Inthispaper,alocaloptimalsubsetofusers,whichcanmaximizethelocalsumcapacity,isfirstchosenbythegreedymethodineverycooperativebasestationinparallel.Then,allthecooperativebasestationsreporttheirlocaloptimaluserstothecentralunit(CU).Finally,theglobaloptimalusers,whichcanmaximizetheglobalsumcapacityofMCPsystems,areselectedfromtheaggregatedlocaloptimalusersattheCU.Thesimulationresultsshowthattheproposedmethodperformscloselytotheoptimalandcentralizedalgorithm.Meanwhile,thecomplexityandbackhaulloadarereduceddramatically.
简介:Inthispaper,aframeworkispresentedforaddingageneralcommandrecoveryfacilitytouserinterface.Asimplemodelofinteractivesystemisdiscussedandfourmetacommands.UNDO,REDO.SKIPBACK,andSKIPFORWARD,aredefined.Thedouble-linkedlistisusedtoorganizetherecoveryinformationinanaturalwayforeasyimplementation.Applicationsoftheframeworktovariousdemandsofcommandrecoveriesshowthattheuseoftheframeworkisveryeasyandconvenient.
简介:Anapproachtosupportinguserinterfacesusinganattributegrammarcombinedwithaneventmodelisdescribed.Themainemphasisishowtorepresentamulti-threaddialoguemodelindirectmanipulationuserinterfaces.Itisshownthatcontrolsequencewithindialogues,communicationwithotherdialogues,andsomecomputationsforapplicationscanbespecifiedwithasyntacticandsemanticnotation.Theattributegrammarspecificationcanbeimplementedusinganattributegrammarintepreterembeddedintherun-timestructuresupportingcommunication,synchronization,anddialogueexecuton.
简介:Withtheexplicitconsiderationofuserheterogeneity,i.e.,eachuserhasadifferentvalueoftime(VOT),thispaperexaminesthesystemefficiencyandsocialequityoftollrevenueredistributioninabi-modetransportationsystem.Threeschemesofdistributingtheroadtollrevenueareproposed,whichrespectivelyconsiderefficiency,equity,aswellasefficiencyandequitytogether.Withmildassumptions,weprovethatthenumberofauto-motoristsdecreasesandthetotalsocialcostincreaseswithtransitsubsidysharewhenonlymarginaloperatingcostofthetransitiscoveredbyitsfare.However,whenaveragefixedcostofthetransitisfurthercovered,thetotalsocialcostisa'U'shapecurveagainstthetransitsubsidyshare.Numericalresultsshowthatthewelldesignedtollrevenueredistributionschemescanmakethesystemmoreequitablewhilekeepinghighefficiency.Withtheincreaseofuserheterogeneity,theGinicoefficientbecomeslargerwhilethetotalsocialcostgoesdown.
简介:Duetothecapabilityofreflectingsocialperceptiononsemanticofresources,folksonomyhasbeenproposedtoimprovethesociallearningforeducationandscholarresearching.However,itsactualimpactissignificantlyinfluencedbythesemanticambiguityproblemoftags.So,inthispaper,weproposedanovelwayofdetectinghomonyms,oneofthemainsourcesoftag’ssemanticambiguityproblem,innoisyfolksonomies.Thestudyisbasedontwohypotheses:1)Usershavingdifferentintereststendtohavedifferentunderstandingofthesametag.2)Usershavingsimilarinteresttendtohavecommonunderstandingofthesametag.Therefore,wefirstlydiscoverusercommunitiesaccordingtousers’interests.Then,tagcontextsarediscoveredinsubsetsoffolksonomyonthebasisofusercommunities.Theexperimentalresultsshowthatourmethodiseffectiveandoutperformthemethodfindingtagcontextsusingalltagsinfolksonomywithoverlappingclusteringalgorithmespeciallywhenvarioususershavingdifferentinterestsarecontainedbythefolksonomy.
简介:Toavoidtheinaccurateestimationoftheactiveuser'snumberandthecorrespondingperformancedegradation,anovelPOR-basedUserIdentificationDetector(UID)isproposedfortheCodeDivisionMultipleAccess(CDMA)systems.ThenewdetectoradoptsthePowerofR(POR)techniqueandtheMultipleSignalClassification(MUSIC)method,whichdoesnotrequiretheestimationofactiveusers'number,andobtainslowerfalsealarmprobabilitythanthesubspace-basedUIDinthemultipathchannels.However,fromouranalysis,increasingtheordermdoesnotimprovetheperformance.Therefore,whenmisone,theperformanceofthenewdetectorismaximal.
简介:BilateralTransactionbetweenlargeusersandpowergenerationenterprisesisnotasimplereform.Itisanimportantstageinpowermarketrestructuringandwillgranttheelectricityuserstherightofserviceselection.Theimplementationofbilateraltransactionswillhelptoestablishthemultiplebuyers’marketstructure,reasonablepricemechanismandmarkettradingmechanism.Itisalsoanimportantapproachtoenhancethecompetitioninthemarketandimprovetheefficiencyofenergyresourceallocation.
简介:BilateralCochlearimplants(CIs)improvedspeechintelligibility,speechperceptioninbackgroundnoise,andsoundlocalizationinquietandnoisysituations.However,itisunclearwhethertheseadvantagesessentiallyresultinbinauralintegrationofacousticstimulifromeachear.Inthisstudy,weinvestigatedtheeffectivenessofbinauralintegrationbybilateralCIsplacementusingbinauralhearingtestsandsubjectiveauditoryperceptualassessment.A61-year-oldbilateralCIssubjectunderwentthefollowingfourtests:theJapaneseHearinginNoiseTest(HINT-J),thedichoticlisteningtest(DLT),theRapidlyAlternatingSpeechPerception(RASP)test,andsubjectiveauditoryperceptualassessment.TheHINTJscorewassignificantlyhigherforbilateralCIsthanforaunilateralCI.However,DLTandtheRASPtestrevealedcontradictoryresults.Subjectiveauditoryperceptualassessmentrevealedactiveandbrightimpressionsforbilateralhearing,whichwerealsonoisyandstrongcomparedwiththoseforunilateralhearing.TheresultsofthisstudyrevealedthatbilateralCIsimprovedspeechperceptioninbackgroundnoiseandanimprovedauditoryimpression,althoughthebilateralintegrationabilitieswerenotimproved.ThiswasprobablybecausethepatientwasrequiredtocombineinformationfromthetwoearsintoasingleperceptioninDLTandtheRASPtest.Morelongitudinaldatashouldbecollectedandanalyzedinfuturestudiestoevaluatethelong-termeffectsofbilateralCIs.
简介:Inmodernhighenergyandastrophysicsexperimentsthevarietyofuserrequirementsandthecomplexityoftheproblemdomainofteninvolvethecollaborationofseveralsoftwareframeworks,anddifferentcomponentsareresponsibleforprovidingthefunctionalitiesrelatedtoeachdomain.Forinstance,acommonusecaseconsistsinstudyingthephysicseffectsandthedetectorperformance,resultingfromprimaryevents,inagivendetectorconfiguration,toevaluatethephysicsreachoftheexperimentoroptimisethedetectordesign,Suchastudytypicallyinvolvesvariouscomponents:simulation,Visualisation,Analysisand(interactive)UserInterface.Wefocusonthedesignaspectsofthecollaborationoftheseframeworksandonthetechnologiesthathelptosimplifythecomplexprocessofsoftwaredesign.
简介:TheCDFcollaborationattheFermilabTevatronanalysesproton-antiprotoninteractionsatacenter-of=massenergyof2TeV.duringthethecolliderrunstartingthisyeartheexperimentexpectstorecord1Petabyteofdataandassociateddatasamples,TheDataHandling(DH)systemhasonlineandofflinecomponents.TheDHofflinecomponentprovidesaccesstothestoreddata,tostoredreconstructionoutput,tostoredMonte-Carlodatasamples,anduserowneddatasamples.Itservesmorethan450physicistsofthecollaboration.TheextrarequirementstotheofflinecomponentoftheDataHandlingsystemaresimplicityandconvenienceforusers.Morethan50millioneventsoftheCDFRunIIdatahavebeenalreadyprocessedusingthissystem.
简介:ToimproveuserexperienceofcompositeWebservices,auser-awarequalityofservice(QoS)basedWebservicescompositionmodelisproposed.Undersuchmodel,aWebservicesselectionmethodbasedonquantumgeneticalgorithmisproposed.Thisalgorithmusesquantumbitencoding,dynamicstep-lengthquantumgateangleadjustment,neighborhoodservicesearchanddynamicpunishmentstrategytoexpandsearchscopeandspeedupconvergence.SimulationexperimentshowsthatthisalgorithmismoreefficientthanotherexistingalgorithmsinWebservicesselection.