简介：提出了一种基于IP的视频传输方案，描述了其中的核心技术，给出了硬件和软件的实现方法。实验证明该方案具有结构简单，画面清晰，延时小的特点。

简介：Aquality-of-service(QoS)awarescheme,calledprecautionaryperformancemonitoring,isproposedtosolvetheopticalimpairmentsandcongestioncontrolincoherentopticalorthogonalfrequencydivisionmultiplexed(CO-OFDM)networks.Thecentralizedpathcomputationelement(PCE)extensionsbasedontheQoSlevelareappliedtoopticalperformancemonitoringinthisletter.

简介：Thestablemulticastflowaggregation(MFA)problemininternetprotocol(IP)overopticalnetworkunderthedynamicalscenarioisstudied.Givenanopticalnetworktopology,thereisasetofheadendsandaccessroutersattachedtotheopticalnetwork,inwhicheachheadendcanprovideasetofprograms(IPmulticastingflows)andeachaccessrouterrequestsasetofprograms,wefindasetofstablelight-treestoaccommodatetheoptimallyaggregatedmulticastIPflowsiftherequestsofaccessrouterschangeddynamically.Weintroduceaprogramcorrelationmatrixtodescribethepreferenceofendusers'requests.AstheoriginalMFAproblemisNP-complete,aheuristicapproach,namedmostcorrelatedprogramfirst(MCPF),ispresentedandcomparedwiththeextendedleasttreefirst(ELTF)algorithmwhichistopology-aware.SimulationresultsshowthatMCPFcanachievebetterperformancethanELTFintermsofstabilitywithnegligibleincrementofnetworkresourceusage.

简介：<正>中国工控网作为行业知名展会,FNPA多年来一直以其国际化和专业化水准为广大厂商所认可。2004年7月13日,北京国际展览中心,第八届FA/PA国际工厂/过程自动化技术与装备展览会又一次如期召开,吸