简介:TheanalysisandevaluationofanactualportsystemcontainingRdifferentship’skindsandNsubsystemseachofwhichconsistsofM.(i=1,2,…,N)portsarederived.TheexternalarrivalsofshipstothesystemcomefromRdifferentPoissonsourcesandtheinterarrivalstothequeueofeachportofasubsystemaredeterminedaccordingtoconditionprobabilities.EachporthasmultipleberthswhoseservicetimesaredistributedaccordingtoErlangprobabilitydistributionfunctions.EachportofasubsystemhasRinfinitecapacitybuffersforstoringshipsinterarrived.Thismethodprovidesagoodapproximationprocedureforobtainingsystemperfor-mancemeasuressuchaswaitingtimesofships,averagequeuelengths,etc.Optimumportcapacitycanthusbeevaluatedbyusingthisanalysis.Asimulationisalsopresentedtotestthisapproximateanalysis,andagoodagreementisobserved.Thismodelshallbeusedintheplanningofseveralactualportsystems.Throughtheapplicationofthismodel,itispossibletoanalyzeandevaluateperformancesofthesystems.
简介:在在它的失败以后的一个舷侧电源系统(SPS)的电的网络的可配置性对电源供应的恢复中央并且改进SPS的survivability。航行过程创造不同操作条件的一个序列。一些负担的优先级在改变操作条件不同。在分析典型SPS的特征以后,一个模型被开发使用一个等级III总机和一个环境权衡轻重代理人(EPA)算法。当它逻辑地并且身体上象多代理人一样被分散,这个算法被选择面向。EPA算法被用来决定动态负担优先级,然后,最好遇见最大的电源供应负担选择了工具。模拟结果证明更高的优先级负担是第一被恢复。系统满足了所有必要限制,表明建议方法的有效性和有效性。
简介:Inourearlierpaper,powersystemstabilizers(PSSs)aredesignedforanine-machinesystem,anewpole-placementtech-niqueisdevelopedforthedesign,andparticipationfactorsareusedtodecidehowmanystabilizersarerequiredandwheretheyshallbe.Eachmachinebeingrepresentedbyalow-orderlinearmodel,thereissomereservationoftheresults.Inthispaper,extensivetransientsimulationsareperformedandeachmachineisrepresentedbyahigh-ordernonlinearmodel.Coherentgroupsarefound.Aweightedspeeddeviationindex(SDI)isdefinedtofindoutthemostunstablemachinesinthesystem.PSSsaredesignedafterthedecisionsofPSSnumberandsites.Transientsimulationsarecarriedoutagainfortheclosed-loopsystem.Asystemstabilityindex(SSI)isusedtoevaluatethestabilityoftheclosed-loopsystem.ItisfoundthatthreePSSsaresufficienttoensurethestabilityofthenine-machinesystem.
简介:摘要:本文针对学生不易掌握导数含参数问题中参数该如何分类的问题,通过对几个典型问题的探究,结合流程图来对参数的分类方法和含参数问题的求解步骤来进行总结,形成解决此类问题的模式化解题方法。用流程图来体现参数的分类方法,直观明了,易理解,将解题思想流程化,易操作。