简介:MarkovianarrivalprocesseswereintroducedbyNeutsin1979(Neuts1979)andhavebeenusedextensivelyinthestochasticmodelingofqueueing,inventory,reliability,risk,andtelecommunicationssystems.Inthispaper,weintroduceaconstructiveapproachtodefinecontinuoustimeMarkovianarrivalprocesses.TheconstructionisbasedonPoissonprocesses,andissimpleandintuitive.SuchaconstructionmakesiteasytointerprettheparametersofMarkovianarrivalprocesses.Theconstructionalsomakesitpossibletoestablishrigorouslybasicequations,suchasKolmogorovdifferentialequations,forMarkovianarrivalprocesses,usingonlyelementarypropertiesofexponentialdistributionsandPoissonprocesses.Inaddition,theapproachcanbeusedtoconstructcontinuoustimeMarkovchainswithafinitenumberofstates
简介:供应商选择是因为它的战略重要性,组织执行的最关键的活动之一。供应商选择是包含量、质的标准的一个多客观的问题。多年以来,很多条量的途径被试试。尽管分析层次过程(AHP)以前处于供应商选择问题被使用了,面向申请的AHP文学的一主要软弱是它趋于集中于AHPinstead的力学在与发现一个答案联系的理论、实际的含意上。尽管它是最广泛地使用的多重标准决定分析方法论之一,我们的文学搜索显示大多数研究发现了最好的答案并且在那里停止了,忽略敏感分析。执行敏感分析为实际决策是很重要的,有时平象发现最好的答案一样重要。在这篇论文,第一次,为real-worldcase的AHP的全面应用在为一个Turkishconstruction公司选择最好的供应商与敏感分析一起被介绍。由于这研究,公司决定分配在二个最高的供应商之间的顺序数量。
简介:ThispaperpresentsanewalgorithmforcomputingtheextendedHenselconstruction(EHC)ofmultivariatepolynomialsinmainvariablexandsub-variablesu1,u2,···,umoveranumberfieldK.Thisalgorithmfirstconstructsasetbyusingtheresultantoftwoinitialcoprimefactorsw.r.t.x,andthenobtainstheHenselfactorsbycomparingthecoefficientsofxionbothsidesofanequation.SincetheHenselfactorsarepolynomialsofthemainvariablewithcoefficientsinfractionfieldK(u1,u2,···,um),thecomputationcostofhandlingrationalfunctionscanbehigh.Therefore,theauthorsuseamethodwhichmultipliesresultantandremovesthedenominatorsoftherationalfunctions.Unlikepreviously-developedalgorithmsthatuseinterpolationfunctionsorGrobnerbasis,thealgorithmrelieslittleonpolynomialdivision,andavoidsmultiplyingbydifferentfactorswhenremovingthedenominatorsofHenselfactors.AllalgorithmsareimplementedusingMagma,acomputationalalgebrasystemandexperimentsindicatethatouralgorithmismoreefficient.
简介:大、复杂的建设从各种各样的来源投射脸风险,如此的工程的成功的结束取决于有效风险管理。这研究调查参予在中国构造AP1000核电厂的中国公司面对的风险。AP1000核反应堆是新的,产生III+反应堆由Westinghouse并且到设计了在中国首先被造。半结构化的会见途径被用来从在中国涉及AP1000工程的专家得到信息。基于会见,风险的各种各样的来源被识别。通常除了将军冒险那megaprojects脸,有唯一的风险,从象工艺、政治、组织上、单个的人员风险那样的各种各样的来源产生。风险管理策略被建议管理在学习识别的一般、唯一的风险。这研究的调查结果将对涉及AP1000核电厂的构造减轻与工程联系的风险的中国公司有用。
简介:Inthispaper,theproblemofconsensusforcontinuoustimesingularsystemsofmulti-agentnetworksisconsidered.Thedefinitionofr-consensusisintroducedforsingularsystemsofmulti-agentnetworks.Firstly,linearsystemswithalgebraicconstraintsareconsidered,andthecorrespondingresultsaboutconsensusandaverage-consensusarederived.Thenr-consensusandconsensusproblemsofsingularsystemsareinvestigated.Sufficientconditionsofr-consensusandconsensusareobtained,respectively.Finally,anillustrativeexampleisgiventoshowtheeffectivenessoftheproposedmethod.
简介:ThispaperusesR-statisticsasprojectionindicestoconstructaclassofprojectionpursuit(PP)R-statisticsformultivariatetwosampletestsviaPPtechniques.Examplesarepresentedasapplicationstothelocationanddispersionproblems.