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。
简介:Assetallocationisanimportantissueinfinance,andbothriskandreturnareitsfundamentalingredients.Ratherthanthereturn,themeasureoftheriskiscomplicatedandofcontroversy.Inthispaper,weproposeanappropriateriskmeasurewhichispreciselyaconvexcombinationofmeansemi-deviationandconditionalvalue-at-risk.Basedonthisriskmeasure,investorscantrade-offflexiblybetweenthevolatilityandthelosstotackletheincurringriskbychoosingdifferentconvexcoefficients.Asthepresentedriskmeasurecontainsnonsmoothterm,theassetallocationmodelbasedonitisnonsmooth.Toemploytraditionalgradientalgorithms,wedevelopauniformsmoothapproximationoftheplusfunctionandconvertthemodelintoasmoothone.Finally,anillustrativeempiricalstudyisgiven.Theresultsindicatethatinvestorscancontrolriskefficientlybyadjustingtheconvexcoefficientandtheconfidencelevelsimultaneouslyaccordingtotheirperceptions.Moreover,theeffectivenessofthesmoothingfunctionproposedinthepaperisverified.
简介:AkindofDynamicFullBandwidthUtilized(DFBU)allocationalgorithmisintroduced.Thisalgorithmallowsasinglelinktousebandwidthfarbeyonditsfairsharebandwidthinamulti-servicepackettransportingsystem.Threeimportantparametersastheboundonmaximumandminimumbandwidth,themaximumpacketdelayandtheminimumbandwidthutilizationarediscussedandanalyzed.ResultsofexperimentsshowthattheDFBU-algorithmiscapableofmakingasinglelinkinthesystemtouseallthesparebandwidth(uptofull-bandwidth)whiletheperformanceoffairnessandQoSrequirementisstillguaranteed.
简介:Thetheoryontheresourceoptimalallocationisdiscussedinthisarticle.Onthebaseofthediscussion,forthemainproblemsexistingintheresourceallocationofcommunicationenterprises,thereasonableallocatingmeasuresareputforward.
简介:ThepaperexaminestheperennialenmitybetweensubsistenceandcommercialsugarcaneproductioninWesternKenya,particularlyinKakamega.Thepapermaintainsthatthereisaninverserelationshipintheallocationoflandbetweensugarcaneandsubsistenceproductionwithmorelandbeingallocatedtosugarcanecomparedtofoodproduction.ThepaperanalyzeslandissuesinKakamegawithregardtohowtheyaffectagriculturalproductivity.Thesearethevariouslandtenuresystemseithersupportingordiscriminatingagainstfoodproductionandvariousavenuesoflandacquisitionandownershipandasameansofmakinglandtoproductbothsugarcaneandfoodcrops.Thearea’sagriculturalstatistics,farmer’srecords,andtheresearcher’sphysicalobservationswereofcriticalessenceintermsoftheresearchmethodology.Theconceptsoffoodsecurityandproduction’sarticulationofmodesofareappliedinthestudy.Thestudyconfirmedthatindeedmorelandwasallocatedtosugarcaneproductionthantosubsistenceproduction,whichcompromisedfoodsecurityinwesternKenya.ThestudyrecommendstheneedtoimmediatelyreversethislandallocationsituationiffoodsecurityistobeattainedinKakamega.Itfurtherrecommendsthefullimplementationofthelandselectioncriteriaforthelandtobeputeitherundercontractedsugarcanecultivationprivatesugarcanecultivationintheregion.Toattainthis,itcallsuponthegovernmentapparatustobepro-activeifthesubsistencesectorandsubsistencesustainabilityistobeachieved.
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.
简介:Inthispaper,ablockwiseadaptivesubcarrierallocationalgorithmformultiuserOrthogonalFrequencyDivisionMultiplexing(OFDM)systemisintroduced.Assumingtheknowledgeofchannelinformationforallusers,thealgorithmminimizesthetotaltransmitpowerwhilesatisfyingthetotalpowerandusers'rateconstraints.TheresultofsimulationshowsthattheproposedalgorithmreducestheaveragebitSignal-to-NoiseRatio(SNR)byapproximately4dBcomparedwithOFDM-FrequencyDivisionMultipleAccess(OFDM-FDMA),andsupportsmoreusersinamultiuserRayleighfadingchannel.Asassigningsubcarriersinblock,thecomputationalcomplexityofthealgorithmismuchlowerthanthatofthederivationof"water-filling"algorithm.
简介:Inthispaper,anenergyefficientbandwidthallocationschemeisproposedforwirelesscommunicationsystems.Anoptimalbandwidthexpansion(OBE)schemeisproposedtoassigntheavailablesystembandwidthforusers.Whenthesystembandwidthdoesnotreachthefullload,theremainingbandwidthcanbeenergy-efficientlyassignedtotheotherusers.SimulationresultsshowthattheenergyefficiencyoftheproposedOBEschemeoutperformsthetraditionalsamebandwidthexpansion(SBE)scheme.Thus,theproposedOBEcaneffectivelyassignthesystembandwidthandimproveenergyefficiency.
简介:Inmobileadhocnetworks(MANET),nodesmovefreelyandthedistributionofaccessrequestschangesdynamically.Replicaallocationinsuchadynamicenvironmentisasignificantchallenge.Inthispaoer,adynamicadaptivereplicaallocationalgorithmthatcanadapttothenodesmotionisproposedtominimizethecommunicationcostofobjectaccess.Whenchangesoccurintheaccessrequestsoftheobjectorthenetworktopology,eachreplicanodecollectsaccessrequestsfromitsneighborsandmakesdecisionslocallytoexpandreplicatoneighborsortorelinquishthereplica.Thealgorithmdynamicallyadaptsthereplicaallocationschemetoalocaloptimalone.SimulationresultsshowthatouralgorithmsefficientlyreducethecommunicationcostofobjectaccessinMANETenvironment.
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.
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.
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。
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。