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20 个结果
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  • 简介:老师给小加勒布置了一项任务:数一数树木里不同鸟类的数量。你能帮助小加勒完成任务吗?

  • 标签: 小学 英语 课外阅读 阅读材料
  • 简介:Oftenthelifecycledataoccurascountofthevitaleventsandarerecordedasintegers.Thepurposeofthisarticleistomodelthefertilitybehaviorbasedonreligious,educational,economic,andoccupationalcharacteristics.TheresponsesofclassifiedgroupsaccordingtothesedeterminantsareexaminedforsignificantinfluenceonfertilityusingPoissonregressionmodel(PRM)basedontheNationalFamilyHealthSurvey-3dataset.TheobservedandpredictedprobabilitiesunderPRMindicatemodalvalueoftwochildrenforthePoissondistributionmodeleddata.Presenceofdominanceoftwochildinthedatamotivatestheauthorstoadoptmultinomialregressionmodel(MRM)inordertolinkfertilitywithvarioussocioeconomicindicatorsresponsibleforfertilityvariation.Choiceoftheexplanatoryfactorsislimitedtotheavailabilityofdata.Trendsandpatternsofpreferenceforbirthcountssuggestthatreligion,caste,wealth,femaleeducation,andoccupationarethedominantfactorsshapingtheobservedbirthprocess.Empiricalanalysissuggeststhatboththemodelsusedinthestudyperformsimilarlyonthesampledata.However,fittingofMRMbytakingbirthcountoftwoascomparisoncategoryshowsimprovedAkaikeinformationcriterionandconsistentAkaikeinformationcriterionvalues.CurrentworkcontributestotheexistingliteratureasitattemptstoprovidemoreinsightintothedeterminantsofIndianfertilityusingPoissonandMRM.

  • 标签: COUNT data FERTILITY POISSON model MULTINOMIAL
  • 简介:ObjectiveTrauma在在沙特阿拉伯的年轻年龄组之中是死亡和病态的领先的原因并且开发国家。这研究试图为临床的严厉作为一个潜在的预言者与创伤的大脑损害(TBI)在孩子评估血小板计数的秋天,outcome.MethodsTotally,有TBI的74个病人从开始2008年1月到目的进入我们的医院的小儿科的特别护理单位(PICU)2010年3月(27个月)。基线注册标准是很长时间12年,在在损伤事件以后的4个小时以内的承认,和缩短的损害规模(AIS)(或),3.1;相对风险(RR),2.15。接收装置操作特征(巨鸟)曲线和Youden索引证明PFP的最佳截止点在51.5%.ConclusionPFP与TBI的严厉被增加,它能也为它的结果作为一个重要独立预言因素被拿。

  • 标签: 创伤性脑损伤 血小板计数 外伤 血小板减少 价值 神经系统疾病
  • 简介:领先的精密元器件和SMT备件提供商CountOnToos公司日前为CREELED元器件推出新的定制SMT贴装喷嘴系列。这一新系列已经得到制造商的认可,基于CREE公司的严格要求和技术数据。

  • 标签: SMT贴装 LED TOOLS 喷嘴 定制 CREE公司
  • 简介:Countdatawithexcesszerosareoftenencounteredinmanymedical,biomedicalandpublichealthapplications.Inthispaper,anextensionofzero-inflatedPoissonmixedregressionmodelsispresentedfordealingwithmultileveldataset,referredashierarchicalmixturezero-inflatedPoissonmixedregressionmodels.AstochasticEMalgorithmisdevelopedforobtainingtheMLestimatesofinterestedparametersandamodelcomparisonisalsoconsideredforcomparingmodelswithdifferentlatentclassesthroughBICcriterion.AnapplicationtotheanalysisofcountdatafromaShanghaiAdolescenceFitnessSurveyandasimulationstudyillustratetheusefulnessandeffectivenessofourmethodologies.

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  • 简介:摘要:本文主要介绍了西门子S7-1500 TM count 模块通过组态工艺对象的方式实现计数的功能,包括接线、硬件配置、工艺对象配置及代码程序的实现

  • 标签: TM_COUNT 工艺对象(TO) 高速计数
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  • 简介:Adatastreamisamassiveunboundedsequenceofdataelementscontinuouslygeneratedatarapidrate.Duetothisreason,mostalgorithmsfordatastreamssacrificethecorrectnessoftheirresultsforfastprocessingtime.Theprocessingtimeisgreatlyinfluencedbytheamountofinformationthatshouldbemaintained.Thisissuebecomesmoreseriousinfindingfrequentitemsetsorfrequencycountingoveranonlinetransactionaldatastreamsincetherecanbealargenumberofitemsetstobemonitored.WehaveproposedamethodcalledtheestDecmethodforfindingfrequentitemsetsoveranonlinedatastream.Inordertoreducethenumberofmonitoreditemsetsinthismethod,monitoringthecountofanitemsetisdelayeduntilitssupportislargeenoughtobecomeafrequentitemsetinthenearfuture.Forthispurpose,thecountofanitemsetshouldbeestimated.Consequently,howtoestimatethecountofanitemsetisacriticalissueinminimizingmemoryusageaswellasprocessingtime.Inthispaper,theeffectsofvariouscountestimationmethodsforfindingfrequentitemsetsareanalyzedintermsofminingaccuracy,memoryusageandprocessingtime.

  • 标签: 计数估计 数据流 数据分析 频繁项设置
  • 简介:Hemocytecountsandphenoloxidase(PO)activitywereexaminedafterhemolymphbeingincubatedindopamine(DA),noradrenaline(NE)andserotonin(5-HT).Resultsshowedthatallthethreebiogenicamines(BAs)hadasignificantimpactontotalhemocytecount(THC),differentialhemocytecount(DHC),andintracelluarandextracelluarphenoloxidase(PO)activity.AmongtheseBas,DAhadthestrongesteffectontheaboveparameters,whereas5-HThadtheleasteffect.PreincubationwithD1receptorantagonistSCH23390,D2receptorantagonistSulpirideand1:1admixtureofthetwocouldsignificantlyinhibittheeffectofDAontheseparameters.SCH23390showedastrongerinhibitoryeffectthanSulpiride,andtheadmixtureexhibitedthestrongesteffect.Theseresultssuggestedthatthechangeofhemocytecountandactivationofprophenoloxidase(proPO)systeminLitopenaeusvan-nameihemocytecanberegulatedbyBAs,andDAmodulatesthetwoparametersviaitsreceptors.

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  • 简介:Background:Inthispaper,aregressionmodelforpredictingthespatialdistributionofforestcockchaferlarvaeintheHessianRiedregion(Germany)ispresented.Theforestcockchafer,anativebioticpest,isamajorcauseofdamageinforestsinthisregionparticularlyduringtheregenerationphase.ThemodeldevelopedinthisstudyisbasedonasystematicsampleinventoryofforestcockchaferlarvaebyexcavationacrosstheHessianRied.Theseforestcockchaferlarvaedatawerecharacterizedbyexcesszerosandoverdispersion.Methods:Usingspecificgeneralizedadditiveregressionmodels,differentdiscretedistributions,includingthePoisson,negativebinomialandzero-inflatedPoissondistributions,werecompared.Themethodologyemployedallowedthesimultaneousestimationofnon-linearmodeleffectsofcausalcovariatesand,toaccountforspatialautocorrelation,ofa2-dimensionalspatialtrendfunction.Inthevalidationofthemodels,boththeAkaikeinformationcriterion(AIC)andmoredetailedgraphicalproceduresbasedonrandomizedquantileresidualswereused.Results:ThenegativebinomialdistributionwassuperiortothePoissonandthezero-inflatedPoissondistributions,providinganearperfectfittothedata,whichwasproveninanextensivevalidationprocess.Thecausalpredictorsfoundtoaffectthedensityoflarvaesignificantlyweredistancetowatertableandpercentageofpureclaylayerinthesoiltoadepthof1m.Modelpredictionsshowedthatlarvadensityincreasedwithanincreaseindistancetothewatertableuptoalmost4m,afterwhichitremainedconstant,andwithareductioninthepercentageofpureclaylayer.Howeverthislattercorrelationwasweakandrequiresfurtherinvestigation.The2-dimensionaltrendfunctionindicatedastrongspatialeffect,andthusexplainedbyfarthehighestproportionofvariationinlarvadensity.Conclusions:Assuchthemodelcanbeusedtosupportforestpractitionersintheirdecisionmakingforregenerationandforestprotecti

  • 标签: 幼虫密度 空间分布 回归建模 金龟子 黑森州 大栗鳃金龟
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  • 简介:类Eois在南部的厄瓜多尔的山雨林包括尺蠖蛾的megadiverse集合的重要部分。在这研究,我们报导:在为鉴定目的Eois的一个DNAbarcode图书馆的构造的(i);并且(ii)通过由对明智的距离阀值的种类定界线的种类差异的探索。COIbarcode序列从在ReservaBiol在狭窄的地理规模(40km2)上收集的408个个人(至少105种类)被产生

  • 标签: 物种多样性 条码技术 山地森林 热带雨林 DNA 划界