简介：Theper-unit-lengthcapacitanceparameterofmulticonductortransmissionline(MTL)iscommonlyextractedwithindirectmatrixtransformmethod,whichiscomplexandtime-consuming.Tosolvetheproblem,animprovedmethodtodirectlycomputetheMTLcapacitanceisproposed,whichcanbeappliedinthetransmissionlinestructurewitharbitraryshapedcross-sectionandarbitraryseparatedistance.Thismethodimportsvoltageconversionsandmatrixoperationstosimplifythecomplexity,improvescomputationalefficiencybyabout600%withresultsasaccurateaspreviousmethod.ThenovelmethodpresentsaclearchargedistributionmapofMTL,whereaspreciousmethodwillexperienceatortuousprocesstogetchargedistribution.

简介：ThispaperstudiesthepowercontrolprobleminfemtocellsystembasedonNashnon-cooperativegametheory.Itdesignsanutilityfunctiontakingfemstations'transmitpowerasvariableandrelatesittotherequirementsofmacrousers'andfemusers'signaltointerferenceplusnoiseratio(SINR).Theutilityalsotakestheimpactoffemstations'locationintoaccountandimprovesthefairnessofnon-cooperativegame.Onthisbasis,thispaperproposesadistributedpowercontrolalgorithmandprovestheexistenceanduniquenessofParetooptimalpoint.Thesimulationresultsshowthatthealgorithmimprovestheconvergencespeedandsystemperformancethroughimprovingusers'SINR.

简介：Thisarticlepresentsadatamanagementsolutionbasedonthedatadistributionservice(DDS)communicationmodel.ThebasicDDScommunicationmodelconsistsofaunidirectionaldataexchangewhereapplicationsthatpublishdata'push'therelevantdata,whichisupdatedtothelocalcachesofco-locatedsubscriberstothedata[1].DDShasnospecifiedcenternodetoforwarddatapacketsandmaintainthecommunicationdata.Thistypeofpublish-subscribe(P/S)modelpresentsintegrityandconsistencychallengesindatamanagement.Unlikepeer-to-peer(P2P)distributedstorage,DDSapplicationshaveahardreal-timeenvironmentandfewerdatafeatures,andthecoreproblemisensuringtheintegrityandconsistencyofdataindistributedsystemsunderthishardreal-timeenvironment.ThisarticlebeginswithabriefintroductionofthecommunicationmodelusedbyDDS,thenanalyzespersistentdatamanagementproblemscausedbysuchmodel,andprovidesanappropriatesolutiontotheseproblems.Thissolutionhasbeenimplementedinaprototypesystemofthereal-timeservicebus(RTSB)ofTsinghuaUniversity.

简介：为了在无线传感器网络(WSN)完成安全通讯，在有有限计算能力的传感器节点随机在敌对领土上被散布的地方，各种各样的关键分发前策划(KPS)被建议了。在这份报纸，新KPS在有限的地上基于symplectic几何学被建议。在一个symplectic空格的固定维的subspace代表一个节点，所有1-dimensionalsubspaces表示钥匙和每个节点分享了钥匙。但是这天真的印射不保证一个好网络得到跳回。因此，它被建议二个节点不得不计算一把pairwise钥匙的提高的KPS，仅当他们分享至少q普通钥匙。这条途径对节点俘获攻击提高跳回。与解决方案的存在相比，结果证明那条新途径更加提高网络可伸缩性，并且完成好连接和好全面性能。