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46 个结果
  • 简介:Nonlinearmixedeffectsmodel(NLMEM)isbasedontherelationshipbetweenthefixedandrandomeffectsintheregressionfunction.TheNLMEMhasacompetitiveadvantageinanalyzingrepeatedmeasuresdata,thelongitudinaldataandmultileveldata.Thispaperchosetwokindsoftwo-levelnonlinearmixedmodeltoanalyzebasalareagrowthforChineseFir(Cunninghamialanceolata).Model1isageneraltwo-levelNLMEMandModel2isbasedonModel1tofurtherconsiderthefixedeffectsparameterschangeswithaspecificfactor.Firstly,throughtheanalysisofthesetwomodels,thispaperdefinedthebasicmodeltobuildthetwo-levelNLMEM.Secondly,665kindsofmodelsderivedfromModel1and2703kindsofmodelsderivedfromModel2werecalculatedandcompared.Theresultsshowedthat:forModel1,therewere57kindsofmodelsconverging,andwhentheformalparameterb0consideredtheblockeffectsandploteffects,b1andb4onlyconsideredtheblockeffects,themodelfittedthebest;andforModel2,therewere24kindsofmodelconverging,andwhentheformalparameterbsconsideredtheblockeffectsandploteffects,b1onlyconsideredblockeffectsandthefixedeffectsb0changedwithanylevelofblocklevel,Model2fittedthebest.Finally,bycomparingthetraditionalnonlinearregressionmodel,Model1andModel2,theresultsshowedthatModel1andModel2fittedbetterthanthetraditionalnonlinearregression,andModel2wasbestfittingmodel.

  • 标签: NONLINEAR MIXED effects model(NLMEM) TWO-LEVEL NONLINEAR
  • 简介:Weexamineanenergyharvestingsystemoftwomagnetopiezoelasticoscillatorscoupledbyelectriccircuitanddrivenbyharmonicexcitation.Wefocusontheeffectsofsynchronizationandescapefromasinglepotentialwell.Inthesystemwithrelativemistuninginthestiffnessoftheharvestingoscillators,weshowthedependenceofthevoltageoutputfordifferentexcitationfrequencies.

  • 标签: 振荡器 失谐 收获 能源 能量收集 耦合电路
  • 简介:鬼力量引起的错误在二种尺寸与平面接口为一个quasicontinuum方法被学习。为一种特殊情况,我们导出错误的分析表情,它被利用证明鬼力量可以为答案的坡度导致一个有限尺寸错误。错误指数地为腐烂离开接口的错误代数学地腐烂离开接口的错误表演的pointwise估计,比onedimensional问题的慢得多,。

  • 标签: 二维平面 连续介质 尺寸误差 指数衰减 解析表达式 点态估计
  • 简介:ThePianoLessonmainlyfocusesontheconflictcausedbytwooppositeattitudestowardstheheirloom-piano.ThesisterBernieceisdeterminedtokeepthepianoandguardit,forsheconsidersitasthe"sacredicon"ofthesacrificialhistoryofherfamily.WhilethebrotherBoyWillietrieseverywaytosellit,desiringtomakeafortunebybuyingafarmandworkonit.Bothattitudeshavetheirlimitationsrespectively,whichforcesthesiblingstoturntothetraditionalwaytosolvetheconflict.Theythenrealizehowtousethepiano-thesymbolofhistoryandculturallegacy.Thatistokeepitanduseit.

  • 标签: TWO ATTITUDES PIANO history CULTURAL LEGACY
  • 简介:Inthispaper,byprovidingsomedifferentconditionsrespecttoanotherworks,weshallpresenttworesultsonabsoluteretractivityofsomesetsrelatedtosomemultifunctionsoftheformF:X×X→Pb,cl(X),oncompletemetricspaces.

  • 标签: 非线性泛函分析 完备度量空间 分析论 应用
  • 简介:纸介绍2D浅水模型基于为快似地球形状的transients的分析的二阶段的明确的表达发生在河morphodynamics的上下文。质量和动量保存原则独立为两个阶段被强加。模型自然地说明非平衡固体运输,自从两个即时改编假设也不任何东西落后方程被采用代表沉积动力学。建议模型的夸张特性被显示在流动条件上独立地被保存。从1D和2D测试用例的数字模拟的结果与文学相比试验性的数据并且与可得到的数字解决方案。

  • 标签: 河流地貌 水模型 浅水流动 沉积动力学 动量守恒 固体输送
  • 简介:Stereomatchingisafundamentalandcrucialproblemincomputervision.Inthelastdecades,manyresearchershavebeenworkingonitandmadegreatprogress.Generallystereoalgorithmscanbeclassifiedintolocalmethodsandglobalmethods.Inthispaper,thechallengesofstereomatchingarefirstintroduced,andthenwefocusonlocalapproacheswhichhavesimplerstructuresandhigherefficiencythanglobalones.Localalgorithmsgenerallyperformfoursteps:costcomputation,costaggregation,disparitycomputationanddisparityrefinement.Everystepisdeeplyinvestigated,andmostworkfocusesoncostaggregation.Westudiedmostoftheclassicallocalmethodsanddividethemintoseveralclasses.Theclassificationwellillustratesthedevelopmenthistoryoflocalstereocorrespondenceandshowstheessenceoflocalmatchingalongwithitsimportantanddifficultpoints.Attheendwegivethefuturedevelopmenttrendoflocalmethods.

  • 标签: 立体匹配算法 计算机视觉 密集 成本计算 本地方法 研究人员
  • 简介:在这篇文章,我们学习在联合起来的范围在一个领域上弄弯问题的更高的顺序的开始的二个特征值。我们以第一个特征值在第二个特征值上获得估计。特别地,弄弯黄,李和Qi的问题的更高的顺序的开始的二个特征值上的估计[5]在我们的结果被包括。

  • 标签: 特征值估计 球形 第一特征值 单位球 屈曲 高阶
  • 简介:我们采用分子的动力学(MD)广泛地在二维的拥挤不堪的系统沿着二个结晶的方向在裂缝繁殖期间学习动态过程的方法。装载的率上的裂缝开始时间的依赖与连续统分析比较被调查。由计算排水量和压力地,结果在对低速度的宣传快克的asymptotic连续统答案的优秀同意。而且,裂缝尖端速度数字地被达到并且与裂缝表面形态学的不稳定性联系了,它源于强烈各向异性的行为。进一步的分析显著地观察分叉裂缝的愈合过程因为脱臼排放吸收裂缝尖端的集中的紧张精力。

  • 标签: 动态裂纹 各向异性效应 二维 原子 裂纹尖端 分子动力学
  • 简介:试图在安息香perkinsiae的bark学习化学成分。混合物与色析法的方法被孤立的方法,和他们的化学结构被阐明根据光谱数据。结果十混合物作为5-(2-propen-1-one)被孤立并且鉴别-7-methoxy-2-(3,4-methylenedioxyphenyl)benzofuran(1),1-hydryoxyegonolgentiobioside(2),obassiosideB(3),egonol(4),egonol配糖物(5),egonolgentiobioside(6),egonolgentiotrioside(7),styraxlignolideB(8),styraxjaponosideC(9),和masutakeside我(10)。结论混合物1和2是新2-phenylbenzofurans。

  • 标签:
  • 简介:Thispaperpresentsanewbasis,theWSBbasis,whichunifiestheBernsteinbasis,Wang-BallbasisandSaid-Ballbasis,andthereforetheBéziercurve,Wang-BallcurveandSaid-BallcurvearethespecialcasesoftheWSBcurvebasedontheWSBbasis.Inaddition,therelativedegreeelevationformula,recursivealgorithmandconversionformulabetweentheWSBbasisandtheBernsteinbasisaregiven.

  • 标签: r曲线 WANG-BALL曲线 广义 转换公式 贝塞尔曲线 递归算法
  • 简介:Inthispaper,weconsiderthegeneralizedtranslationsassociatedwiththeDunklandtheJacobi-Dunkldifferential-differenceoperatorsonthereallinewhichprovidethestructureofsignedhrpergroupsonR.Especially,westudytherepresentationofthegeneralizedtranslationsoftheproductoftwofunctionsforthesesignedhypergroups.

  • 标签: 翻译 产品 广义 运营商 雅可比