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78 个结果
  • 简介:最佳的试验性的设计为象微数组和proteomics那样的现代高产量的技术的有效使用是重要的。包括测量系统的可靠性的多重因素,自己必须从优先的试验性的工作被估计,能影响设计决定。在这研究,我们描述怎么最佳的数字复制措施(技术复制)为每件生物样品(生物复制)能被决定。不同分配生物、技术复制被最小化技术变化(测量错误)的比率的变化到全部的变化(采样错误和测量错误的和)评估。如果,我们表明那数字生物复制并且数字技术每生物样品复制当可得到的措施的全部的数字被修理时,是可变的,那么最佳的分配为测量评估实验复制要求二技术为各个复制生物复制。因此,使用二被建议技术为各个复制生物如果目标是评估大小的重制度,复制。

  • 标签: 实验研究 分配方式 测量方法 表达
  • 简介:遮蔽下载服务,作为脱机下载请求的内容并且在云存储保留它直到用户们检索它的新应用,最近成为了在中国吸引百万个用户的一个趋势。在面临在下载请求和存储资源的限制的生长之间的窘境时,云服务者不得不设计一个有效资源分配计划提高存储的利用以及满足象一短下载时间一样的用户需要。当用户搅拌机行为被看作一个Markov链过程时,下载速度的合适的分配能优化存储资源利用,这被发现。因此,二动态资源分配策划包括切换的速度(SS)增加的计划和速度(SI)策划被建议。理论分析和模拟结果证明我们的计划能有效地减少存储资源的消费并且为好用户经验使下载时间足够短。

  • 标签: 遮蔽下载服务 存储消费 用户经验 动态资源分配
  • 简介:Assetallocationisanimportantissueinfinance,andbothriskandreturnareitsfundamentalingredients.Ratherthanthereturn,themeasureoftheriskiscomplicatedandofcontroversy.Inthispaper,weproposeanappropriateriskmeasurewhichispreciselyaconvexcombinationofmeansemi-deviationandconditionalvalue-at-risk.Basedonthisriskmeasure,investorscantrade-offflexiblybetweenthevolatilityandthelosstotackletheincurringriskbychoosingdifferentconvexcoefficients.Asthepresentedriskmeasurecontainsnonsmoothterm,theassetallocationmodelbasedonitisnonsmooth.Toemploytraditionalgradientalgorithms,wedevelopauniformsmoothapproximationoftheplusfunctionandconvertthemodelintoasmoothone.Finally,anillustrativeempiricalstudyisgiven.Theresultsindicatethatinvestorscancontrolriskefficientlybyadjustingtheconvexcoefficientandtheconfidencelevelsimultaneouslyaccordingtotheirperceptions.Moreover,theeffectivenessofthesmoothingfunctionproposedinthepaperisverified.

  • 标签:
  • 简介:AkindofDynamicFullBandwidthUtilized(DFBU)allocationalgorithmisintroduced.Thisalgorithmallowsasinglelinktousebandwidthfarbeyonditsfairsharebandwidthinamulti-servicepackettransportingsystem.Threeimportantparametersastheboundonmaximumandminimumbandwidth,themaximumpacketdelayandtheminimumbandwidthutilizationarediscussedandanalyzed.ResultsofexperimentsshowthattheDFBU-algorithmiscapableofmakingasinglelinkinthesystemtouseallthesparebandwidth(uptofull-bandwidth)whiletheperformanceoffairnessandQoSrequirementisstillguaranteed.

  • 标签: 动态分配算法 带宽 DFBU 信息传输
  • 简介:Thetheoryontheresourceoptimalallocationisdiscussedinthisarticle.Onthebaseofthediscussion,forthemainproblemsexistingintheresourceallocationofcommunicationenterprises,thereasonableallocatingmeasuresareputforward.

  • 标签: RESOURCE ALLOCATION MARGINAL THEORY COMMUNICATION enterprise
  • 简介:这篇论文为一个使能够的制造商处理能力分配问题能通过一条独立零售商隧道以及通过她的直接隧道散布她的产品到结束顾客。隧道的要求是substitutable,它导致在他们之间的竞争。我们显示那避免隧道竞争,制造商否认能力的零售商是可能的。明确地,如果隧道替换率高,低需求的一个零售商决不会被分配任何能力甚至当可得到的能力是宽大的时。当如果隧道替换率是低的,能力分配策略取决于零售商的需求时;可得到的能力。许多另外的有趣的经理的卓见被提供;与数字例子说明了。

  • 标签: 电子商务 供应链 容量分配 市场需求
  • 简介:ThepaperexaminestheperennialenmitybetweensubsistenceandcommercialsugarcaneproductioninWesternKenya,particularlyinKakamega.Thepapermaintainsthatthereisaninverserelationshipintheallocationoflandbetweensugarcaneandsubsistenceproductionwithmorelandbeingallocatedtosugarcanecomparedtofoodproduction.ThepaperanalyzeslandissuesinKakamegawithregardtohowtheyaffectagriculturalproductivity.Thesearethevariouslandtenuresystemseithersupportingordiscriminatingagainstfoodproductionandvariousavenuesoflandacquisitionandownershipandasameansofmakinglandtoproductbothsugarcaneandfoodcrops.Thearea’sagriculturalstatistics,farmer’srecords,andtheresearcher’sphysicalobservationswereofcriticalessenceintermsoftheresearchmethodology.Theconceptsoffoodsecurityandproduction’sarticulationofmodesofareappliedinthestudy.Thestudyconfirmedthatindeedmorelandwasallocatedtosugarcaneproductionthantosubsistenceproduction,whichcompromisedfoodsecurityinwesternKenya.ThestudyrecommendstheneedtoimmediatelyreversethislandallocationsituationiffoodsecurityistobeattainedinKakamega.Itfurtherrecommendsthefullimplementationofthelandselectioncriteriaforthelandtobeputeitherundercontractedsugarcanecultivationprivatesugarcanecultivationintheregion.Toattainthis,itcallsuponthegovernmentapparatustobepro-activeifthesubsistencesectorandsubsistencesustainabilityistobeachieved.

  • 标签: SUBSISTENCE COMMERCIAL LAND ALLOCATION CONFLICT
  • 简介:Severalchannelde-allocationschemesforGSM/GPRS(GeneralPacketRadioService)networksareproposedinthispaper.ForDRA(DynamicalResourceAllocation)withde-allocationmechanism,ifanewvoicecallarrivesandfindsthatallthechannelsarebusy,thenoneoftheGPRSpacketswhichoccupymorethanonechannelfordatatransmissionmayreleaseachannelforthenewvoicecall.Thispaperpresents5de-allocationmechanisms,i.e.DA-RANDOM,DA-RICHEST,DA-POOREST,DA-OLDESTandDA-YOUNGEST,toselecttheGPRSpacketforreleasingtheappropriatechannel.SimulationresultsshowthatDAOLDESTachievesthebestperformance,especiallyinpacketsblockingprobability,amongallthede-allocationschemes.Althoughtheperformanceoftheproposedde-allocationschemesisnotsignificantlydifferent,theyareallmuchbetterthanthatoftheschemewithoutde-allocation.

  • 标签: 无线通信服务 GPRS 移动通信 动态资源分配 信道分配
  • 简介:以便改进传播精确性和在事情(IoT)的因特网察觉到并且激活信号的效率并且保证系统稳定性,一个适应资源分配算法被建议,它动态地根据他们的信号频率域特征在部件之中分配网络带宽和优先级。一遥远察觉到并且控制无人的地面的车辆(UGV)路径追踪试验台被开发,追踪错误信号的多重UGV为表演评估在模拟被测量。与一样的网络带宽限制,建议算法能减少的结果表演积累并且UGV路径与常规静态的算法相比在超过60%追踪的最大的错误。

  • 标签: 资源分配算法 自适应 带宽约束 网具 路径跟踪 无人地面车辆
  • 简介:Inthispaper,ablockwiseadaptivesubcarrierallocationalgorithmformultiuserOrthogonalFrequencyDivisionMultiplexing(OFDM)systemisintroduced.Assumingtheknowledgeofchannelinformationforallusers,thealgorithmminimizesthetotaltransmitpowerwhilesatisfyingthetotalpowerandusers'rateconstraints.TheresultofsimulationshowsthattheproposedalgorithmreducestheaveragebitSignal-to-NoiseRatio(SNR)byapproximately4dBcomparedwithOFDM-FrequencyDivisionMultipleAccess(OFDM-FDMA),andsupportsmoreusersinamultiuserRayleighfadingchannel.Asassigningsubcarriersinblock,thecomputationalcomplexityofthealgorithmismuchlowerthanthatofthederivationof"water-filling"algorithm.

  • 标签: OFDM FDMA SNR 正交频分复用 频分多址 信噪比
  • 简介:Inthispaper,anenergyefficientbandwidthallocationschemeisproposedforwirelesscommunicationsystems.Anoptimalbandwidthexpansion(OBE)schemeisproposedtoassigntheavailablesystembandwidthforusers.Whenthesystembandwidthdoesnotreachthefullload,theremainingbandwidthcanbeenergy-efficientlyassignedtotheotherusers.SimulationresultsshowthattheenergyefficiencyoftheproposedOBEschemeoutperformsthetraditionalsamebandwidthexpansion(SBE)scheme.Thus,theproposedOBEcaneffectivelyassignthesystembandwidthandimproveenergyefficiency.

  • 标签: 无线通信系统 带宽分配 自适应 能效 能源利用效率 带宽扩展
  • 简介:Inmobileadhocnetworks(MANET),nodesmovefreelyandthedistributionofaccessrequestschangesdynamically.Replicaallocationinsuchadynamicenvironmentisasignificantchallenge.Inthispaoer,adynamicadaptivereplicaallocationalgorithmthatcanadapttothenodesmotionisproposedtominimizethecommunicationcostofobjectaccess.Whenchangesoccurintheaccessrequestsoftheobjectorthenetworktopology,eachreplicanodecollectsaccessrequestsfromitsneighborsandmakesdecisionslocallytoexpandreplicatoneighborsortorelinquishthereplica.Thealgorithmdynamicallyadaptsthereplicaallocationschemetoalocaloptimalone.SimulationresultsshowthatouralgorithmsefficientlyreducethecommunicationcostofobjectaccessinMANETenvironment.

  • 标签: 移动ADHOC网络 MANET 自适应分配算法 读写模型 稳定邻近值
  • 简介:Streamprocessingapplicationscontinuouslyprocesslargeamountsofonlinestreamingdatainrealtimeornearrealtime.Theyhavestrictlatencyconstraints.However,thecontinuousprocessingmakesthemvulnerabletoanyfailures,andtherecoveriesmayslowdowntheentireprocessingpipelineandbreaklatencyconstraints.Theupstreambackupschemeisoneofthemostwidelyappliedfault-tolerantschemesforstreamprocessingsystems.Itintroducescomplexbackupdependenciestotasks,whichincreasesthedifficultyofcontrollingrecoverylatencies.Moreover,whendependenttasksarelocatedonthesameprocessor,theyfailatthesametimeinprocessor-levelfailures,bringingextrarecoverylatenciesthatincreasetheimpactsoffailures.Thispaperstudiestherelationshipbetweenthetaskallocationandtherecoverylatencyofastreamprocessingapplication.Wepresentacorrelatedfailureeffectmodeltodescribetherecoverylatencyofastreamtopologyinprocessor-levelfailuresunderataskallocationplan.Weintroducearecovery-latencyawaretaskallocationproblem(RTAP)thatseekstaskallocationplansforstreamtopologiesthatwillachieveguaranteedrecoverylatencies.WediscussthedifferencebetweenRTAPandclassictaskallocationproblemsandpresentaheuristicalgorithmwithacomputationalcomplexityofO(nlog2n)tosolvetheproblem.Extensiveexperimentswereconductedtoverifythecorrectnessandeffectivenessofourapproach.Itimprovestheresourceusageby15%-20%onaverage.

  • 标签: stream processing task ALLOCATION FAULT-TOLERANCE UPSTREAM
  • 简介:Orthogonalfrequencydivisionmultipleaccess(OFDMA)isapopularandwidelyacceptedmultipleaccesstechniquetoprovidehighdatarateservicesinamobileenvironmentintheareaofwirelesscommunications.OFDMAcanprovidebetterflexibilityinallocatingtheradiospectrabyutilizingsubcarrierallocations,scheduling,andenergycontroltoobtainmulti-dimensiondiversitygains.Duetoitsresourceallocationflexibility,OFDMAhasbeenwidelyusedasagreenairinterfacetechnologyfortheemergingbroadbandwirelessaccessnetworks.ThispaperextensivelyaddressestheintegrationofgreenOFDMAtothefutureairinterfacetechnologies,forinstance:two-tiercellular,multiradioaccesstechnologies(RATs),FemtoCell,andrelaynetworks.ThemainfocusofthepaperistoreviewandanalyzethecurrentOFDMAtechniquestoaddressthegreenresourceallocationinmultiuserdiversity,wherethecriticalconstraintsarethecomputationalcomplexity,energyefficiency,andthesub-channelassignment.ThefuturetrendofOFDMAbasednetworkswillaimtomaximizetheenergyefficiencyoftheexclusivechannelassignmentthroughajointsub-channelandpowerallocationtoaccommodatehighdatatrafficnetworksspeciallytherelaybased5Gcellularnetworks.

  • 标签: 无线接入网络 OFDMA 资源配置 正交频分多址接入 空中接口技术 子载波分配
  • 简介:这份报纸联合队和数据包封分析(DEA)的理论设计机制最佳地在公共保健分配资源。在它的统治下面的一个法令的权威和公共医院作为一个队,其成员寻求在公共保健是公众的分享的机构的限制下面高效地操作被解释好。单个公共医院利用DEA最大化自己发薪,到对方公众医院的发薪不从外部效果掉落并且从而减去的队条件的题目由保健的公共供应创造了。产生team-DEA答案,它被显示是两个一个别地有效并且team-satisficing平衡并且以一个会聚的算法可计算出来,然后能被权威使用在公共保健决定资源的最佳的分配。一个盒子基于中国数据被介绍说明team-DEA模型准备好了的operationalization和计算。

  • 标签: 资源分配 保健 模型 理论设计 医院 DEA
  • 简介:我们考虑订各采购某些操作到一个普通第三方的公司的多重制造商面对的问题的动态能力。在观察第三方的时间表的当前的状态之上,每个制造商与目的订能力联合最小化源于早交货的成立费用,缓慢惩罚由于订费用的迟了的交货,和第三方的能力。当做预定时,每个制造商评估二个其他的行动:还没保留能力的(i)由另外的制造利用了更早订了;或(ii)与另外的制造商的一个子集或所有形成一个联盟完成最小化联盟的一张时间表花费,即,为那个联盟的一张集中的时间表。后者实践肯定总体上有益于联盟;然而,如果他们的操作是太多推回来的任何一个,一些制造商可以招致更高的费用,或太早交付。为这个原因,做每个制造商的一个费用分配计划比不更坏他们将是当不同地行动时(即,参予一个更小的联盟或对他们的自己的利益起作用,)必须伴随为联盟的集中的安排。我们与可转让的用途作为一个合作游戏在制造商之中为这种关系建模,并且介绍最佳或启发式的算法个别地并且coalitionally达到最佳的时间表以及线性程序明确的表达发现一个核心制造商费用的分配。

  • 标签: 协调问题 容量分配 业务 外包 集中调度 制造商