简介：在知识管理系统(KMS)解决这些问题例如信息分享，扩大的能力和re-engineer，和在分布式、异构的环境的遗产系统的可重用的能力。这篇文章基于设计KMS的代理人和本体论介绍一个方法。这个方法由二个机构组成。一个人是有支持知识管理过程的三个代理人的知识机构。其它是有支持知识申请的三个代理人的申请机构。在这个方法，本体论被用来在在代理人之中交换的消息在知识库和内容代表知识。表明这个方法的优点，实验被执行了，结果暗示这个方法为小、中等尺寸的企业有效、有效设计KMS。

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简介：Inanactivenetwork,userscaninsertcustomizedactivecodesintoactivenodestoexecute.Thusitneedsmoreresourcesthanthoserequiredbyconventionalnetworks,andtheseresourcesmustbeeffectivelymonitoredandmanaged.ManagementpoliciesinexistingOSsaretoocomplicatedtoapplytosimpleactivepackets.Inthispaper,wepresentnewresourcesmanagementpoliciesthataremainlyadopedtomanageCPU,storageandtransmissionbandwidth.Namely,weuseSPFalgorithmtoscheduleandprocessactivepackets,andimportanintervalqueuemethodtoallocatetransmissionbandwidth,andusefeedbackmechanismtocontrolcongestion.Atthesametime,wedesignsomeexperimentsonprototypesystemswithandwithoutresourcesmanagementpoliciesrespectively.Theexperimentsresultsshowthatmanagementpoliciespresentedbyuscaneffectivelymanageresourcesinactivenodesandcanimprovetheperformanceofactivenetworks.

简介：Fromaneconomicangle,thispaperanalyzesanddemonstratestheirrationalityofthecurrentInternetsettlementofInterconnection;thenpointsoutthattheheavychargesforInternetinterconnectionfromdevelopingcountriestothedevelopedcountrycanbethoughtofasoneofthemainandkeyreasonsthatrestrictthebalanceddevelopmentoftheInternetintheworld,whichcausestheintensificationof'digitaldivide',widensthegapbetweenpoorandrichcountriesandfurtheraggravatesthedisequilibriumoftheglobaleconomicdevelopment;andthustheconclusionisreached:thepublicpolicyselectionshouldbemadebythewholeinternationalsocietyjointlyforpayingcloseattentionandregulatingsettlementsystemsofInternetinterconnectiontodwindle'digitaldivide'throughouttheworld.

简介：AimingtoprovideameasurableserviceQualityofService(QoS)evaluatingmethodforserviceinventorymanagement,thispaperproposesanewmobileServiceUtilityModel(SUM),considerstheserviceandbusinesslayerelementsintotheserviceutilityinfluenceprofile,andproposesanself-adaptiveserviceinventorymanagementalgorithmasaQoScontrolschemebasedonSUM.ItcanbeconcludedfromthesimulationresultthattheserviceinventoryutilitycanbefullyreflectedbySUMandthewholesystemefficiencyisgreatlyincreasedbyusingSUMastheadaptiverule.

简介：Avirtuallabsystemisthesimulationofrealdevicesandexperimentsusingcomputerandnetworktech-nology.Itcanmakeusersdoexperimentseasily,observeexperimentphenomenaandresultsthroughtheremotetermi-nal.Consequently,userscangetfinalresultstoverifyrelativetheory.Thearticleanalysesthefeaturesofvirtuallabsystems.Arealvirtuallabsystemnamed'MultimediaVirtualLabforDigitalCircuitLogicDesign(MVLDCLD)'whichhasbeendevelopedbytheauthorsandtheirgroupisalsopresented.

简介：ThispaperaddressesamanagementmodelforIPnetworkbasedonNextGenerationOperationSupportSystem(NGOSS).ItmakesthenetworkmanagementonthebaseofalltheoperationactionsofISP,ItprovidesQoStouserservicethroughthewholepathbyprovidingend-to-endServiceLevelAgreements(SLA)managementthroughwholepath.Basedonwebandcoordinationtechnology,thispapergivesanimplementarchitectureofthismodel.

简介：DiscreteFourierTransform(DFT)basedmultiple-inputmultiple-outputOrthogonalFrequencyDivisionMultiplexing(MIMO-OFDM)isthefocusofwirelesscommunication,whichusescyclicprefixestoreducetheISI.Toimprovethespectrumefficiencyandsystemperformance,ComplexWaveletPacketTransform(CWPT)basedOFDMisusedtorealizetheMIMO-OFDMsystem.Forthegoodpropertyofcomplexwaveletpacketfunction,theCWPTbasedMIMO-OFDMsystemisbetterthantheDFTbasedMIMO-OFDMsystem,buttheCWPTbasedMIMO-OFDMschemehassomeadditionalcomplexity,andsimulationresultsshowthatthenewsystemcanimprovethesystemperformance.

简介：ThehardwarestructureandsoftwarefunctionofintelligencedoormonitoringcontrolsystemsonInternetisexpounded.Theremotemanagingfunction,databasefunction,andtherealizationofdialingusersareintroduced.Theresetcardisinstalledtoimprovereliability.Thedesignofthesystemisreasonableandreliable.Resultsshowedthat10percentofthelineinvestmenthavebeencutoff.

简介：Theperformanceofmassivemultiple-inputmultiple-output(MIMO)systemislimitedbypilotcontamination.Toreducethepilotcontamination,uplinkanddownlinkprecodingalgorithmsareputforwardbasedoninterferencealignmentcriterion.Intheuplinkreceivingprocessing,thetargetfunctionalignsthepilotcontaminationandtheinterferencesignalstothesamenullspaceandacquiresthemaximalspacedegreeofthedesiredsignals.Theuplinkreceivingprecodingmatrixissolvedonmaximalsignaltointerferenceplusnoiseratio(SINR)criterionconsideringtheimpactofthepilotcontaminationonchannelestimations.Theuplinkreceivingprecodingmatrixisusedasthedownlinktransmittingprecodingmatrix.Exploitingthechannelreciprocity,itisprovedthat,iftheuplinkreceivingprecodingmatrixachievesmaximalSINR,theidenticalprecodingmatrixcanbeusedinthedownlinktransmissionandacquiresmaximalsignaltoleakageplusnoiseratio(SLNR).Simulationsshowthatthespectrumefficiencyoftheproposedalgorithmcanreachabout1.5timeshigherthanthatofpopularmatchedfiltering(MF)precodingalgorithm,andabout1.1timeshigherthanmulti-cellminimummeansquareerror(MMSE)precodingalgorithm.Theperformanceoftheproposedalgorithmcanbeimprovedapproximatelylinearlywiththeincreasingofthenumberofantennas.

简介：Adynamicalsystemforcomputingtheellipticboundaryproblemispresented.Itisshownthattheproposedsystemisgloballyasymptoticallystable.Thesystemcanbesimulatedbyaneuralnetwork.Simulationresultsarevalidandsatisfactory.

简介：PlentyofworkhavebeendoneonSpace-Timeprocessinginwhichmultipletransmit/receiveantennasareusedinconjunctionwithcodingtoexploitbothspatialdiversityandtimediversity.ConstantModeAlgorithm(CMA)isanefficientblindadaptiveMulti-UserDetection(MUD)algorithmforCDMAsystems.Inthispaper,weputforwardanovelreceiver,whichcombinesCMAblindadaptiveMulti-userDetectionwithSTBCtechnique,andcomparetheperformancesofthesystemusingdifferentCMalgorithmsincludingSDCMA(Steepest-DescentCMA),StandardLinearityConfineCMA(SLCCMA)andLeastSquaresCMA(LSCMA).Simulationshavebeendonewithmulti-pathRayleighchannel.

简介：录像加速器在分享象YouTube那样的网站的录像为更好的用户经验被开发。PPLive录像加速器(PPVA)在中国有用户的最大的数字，基于对等(P2P)系统。在PPVA的录像和同伴的数字由比哪个多次大的数量级在需求(VoD)上的传统的P2P录像系统。作为结果，尽管资源是足够的，由于不公平赋值，服务的质量几乎不能满足所有用户。在这份报纸，我们在PPVA专注于基本资源的任务：存储和带宽。存储赋值的问题作为一个随机的变量关于请求的数字作为一个非线性的程序(NLP)被提出。当平均数比变化大得多时，请求的变化的影响不是可以忽略、比例的途径的结果表演仅仅是适当的。关于怎么定位录像到适当同伴的标准也被介绍，考虑抑制例如全部的带宽，带宽竞争的概率和在录像之间的公平的利用。而且，分配的启发式的算法以集中、分布式的时尚上载带宽被建议并且在录像之中关于平衡与广泛地使用的策略(相等的分配)作比较。模拟结果证明两个算法能导致重要表演改进。

简介：Asanimportantcomponentofinternetofthings,electronicproductcode(EPC)systemiswidelyusedinmanyareas.However,themassdeploymentofEPCsystemisfrequentlydegradedbysecurityandprivacyproblems.Therefore,themajorresearchesfocusonthedesignofasecureEPCsystemwithhighefficiency.ThispaperdiscussesthesecurityrequirementsofEPCsystemandpresentsauniversalcomposable(UC)modelforEPCsystem,theidealfunctionalityofEPCsystemisalsoformallydefinedwiththeUCframework.ThenasecureprotocolforEPCsystemunderUCframeworkisproposedandtheanalysisofsecurityandperformanceoftheproposedprotocolisgiven,incomparisonwithotherprotocols,theresultsshowthattheproposedprotocolisUCsecureandcanprovideprivacyprotection,untraceability,authorizedaccess,anonymityandconcurrentsecurityforEPCsystem.Furthermore,lesscomputationandstorageresourcearerequiredbytheproposedprotocol.

简介：Offlinenetworktrafficanalysisisveryimportantforanin-depthstudyupontheunderstandingofnetworkconditionsandcharacteristics,suchasuserbehaviorandabnormaltraffic.WiththerapidgrowthoftheamountofinformationontheInternet,thetraditionalstand-aloneanalysistoolsfacegreatchallengesinstoragecapacityandcomputingefficiency,butwhichistheadvantagesforHadoopcluster.Inthispaper,wedesignedanofflinetrafficanalysissystembasedonHadoop(OTASH),andproposedaMapReduce-basedalgorithmforTopNuserstatistics.Inaddition,westudiedthecomputingperformanceandfailuretoleranceinOTASH.FromtheexperimentswedrewtheconclusionthatOTASHissuitableforhandlinglargeamountsofflowdata,andarecompetenttocalculateinthecaseofsinglenodefailure.

简介：在连续RapidIO(SRIO)的一个交通管理计划相连被建议处理噪音和电磁的干扰(EMI)引起的性能降级，它被硬件实现和坚韧的工作环境的几乎没可避免的错误产生。这个计划的主要想法包括适应速度转变和结冰承认(freeze-ACK)。适应速度转变能处于高小点错误率(BER)改进产量和还原剂延期环境。同时，freeze-ACK被采用征服反馈隧道的经常的用法。把适应速度转变与freeze-ACK相结合的计划在SRIO网络为大性能提供改进的模拟表演。

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：Inthispaper,thecapabilityofIEEE802.11bDistributedCoordinationFunction(DCF)modesupportingofConstantBitRate(CBR)andVariableBitRate(VBR)VoiceoverIP(VoIP)trafficisinvestigated.Then,thecapacityof802.11bWirelessLocalAreaNetwork(WLAN)systemcarryingvoicecallsinawiderangeofscenarios,includingvaryingdelayandpacketlossrateconstraintsisanalyzedandevaluated.BothG.711andG.729voiceencodingschemesandarangeofvoiceinter-arrivaltimeareconsidered.Theanalysesandsimulationresultsshowthatcapacityishighlysensitivetothedelaybudgetallocatedtothesumofpacketizationandwirelessnetworkdelays.Foragivenpacketlossrateconstrained,G.729isshowntohaveacapacitygreaterthanthatwhenG.711isused.ThesimulationresultsshowthatbysupportingVBRunderDCFmodethenetworkhastheapproximatelytwicemuchcapacityassupportingCBRhas,regardlessoftheencodingschemesandtheinter-arrivaltime.

简介：稀少的代码多重存取(SCMA)是为下一活动通讯的一个竞争nonorthogonal存取计划。作为分享系统的一个多用户，SCMA采用为在接收装置译码计划传递算法(MPA)的消息，但是它的反复的方法导致高计算的复杂性。因此，基于可变节点(VMPA)传递算法的一条连续消息在这份报纸被建议。在原来的MPA使一些成为微妙的改变到消息更改，VMPA能极大地减少译码计划的全面计算复杂性。而且，考虑那连续结构可以增加译码延期，一个新奇组织计划基于稀少的矩阵被用于VMPA。模拟结果证实新算法，作为组织VMPA(G-VMPA)称为，能比MPA完成在小点错误率(BER)和计算复杂性之间的更好的折衷。

简介：活动性支持上的同样不同的要求将被多样化的通讯情形在第五代(5G)介绍，在需求活动性管理上被提出简化发信号的过程，还原剂终端电源消费，等等改进网络效率。为了在5G在需求活动性管理上启用，联网，驾驶的活动性(MDNS)当为不同活动服务设定网络时，网络切被建议，它考虑单个活动性支持要求。在MDNS框架以内，要求的活动性支持的实际层次被一个活动性描述系统决定，并且与相应活动性管理计划联网片模板被一个网络片描述函数定义。由用具体例子说明，网络切，每个活动终端能与最适当的活动性管理计划被指导到网络片。基于这，一个原型被实现验证MDNS框架的可行性，即与不同活动性管理创造多重网络片策划。另外，平均处理一个活动性事件花费的性能评估为建议MDNS框架被进行，长期的进化(LTE)系统，和操作好处包括效率和可伸缩性被分析。