非线性纵向数据模型中自相关性和随机效应的存在性检验

刻画纵向数据协方差结构有三种可能因素 ,即序列相关 (特别是一阶自相关 )、随机效应和常规的随机误差 (Diggleetal,2 0 0 2 ) .本文研究非线性纵向数据模型的自相关性和随机效应存在性的单个和联合检验 ,得到了检验的score统计量 ,并利用血浆药物渗透数据 (Davidian&Gilinan ,1 995)说明检验方法的应用 .     

STUDIES ON THE CATALYTIC REACTION OF NITROGEN OXIDE ON METAL MODIFIED ACTIVATED CARBON FIBERS

1.INTRODUCTIONNitrogenmonoxide(NO)producedduringthecombustionprocessesisoneofthemostseriouspollutants,whichproducestownsmogandcausesotherseriousworldecologicalproblems.Inrecentyears,scientistspaidgreatattentionstocontrolandremovethiskindofpollutantbydifferenttechniques.Amongthem,catalytictechnologiesareattractivebecauseoftheirlowcostandhighefficiency[1].Nowadays,theNOismainlytreatedbycatalyticreductionwithreducingagentssuchasammoniaandsurphurdioxideandsoonovermetal-basedcatalysts.Thecar…     

Synthesis and Characterization of Ferrocene-terminated Ruthenium Phenylacetylide COmplexes with Alligator Clips

Ferrocene-terminated trans-Ru(dppm)2 (dppm=Ph2PCH2pph2)-containing molecular wires with alligator clips were prepared.They are suitable for self-assembly on gold electrode to investigate the influence of metal incorporation on the electron transportation property of the molecular wires.     

银基带再结晶织构的EBSD分析

本文采用EBSD(电子背散射衍射)等分析手段对{110}<110>取向的银基带的织构形成机理进行了深入研究,发现了冷轧织构与不同退火温度下再结晶织构间的取向转变关系,研究发现,{110}面附近且非{110}<211>取向的冷轧织构组分,900℃退火可以转变为强的{110}<110>织构.织构转变中有孪晶形成,{110}<110>和{110}<114>取向互为孪晶关系.     

Efficient Amide Based Halogenide Anion Receptors

In this paper, we present the synthesis and anion recognition properties of the amide based phenanthroline derivatives 1, 2 and 3. In all cases 1:1 receptor : anion complexes were observed. The receptors were found to be selective for fluoride and chloride respectively over other putative anionic guest species.     

一类Markov链的强逼近

本文给出了一类非时齐的Markov链的强逼近.作为应用,建立了临床试验中Markov链自适应设计的强相合性,重对数律和弱收敛.     

双侧进气突扩燃烧室内液雾燃烧的数值模拟

本文采用全双流体模型对部分切向进气管式双侧进气突扩燃烧室内的液雾燃烧过程进行了数值模拟，将液雾群按初始尺寸分组，数值模拟结果表明不同尺寸液雾的蒸发及燃烧过程显著不同，小尺寸的液雾是先蒸发后燃烧，而较大尺寸的液雾则是边蒸发边燃烧．模拟结果还表明，部分切向进气方式有利于在燃烧室的头部产生大面积的中心回流区，该回流区的存在有利于加强混合及火焰稳定．     

Quantitation of PCR Products by Capillary Electrophoresis in a Single Run

IntroductionItisnecessarytoevaluatetheamountofDNAfragmentinsuchcasesasgeneexpressioninvestigati0n.HybridizationwithradioactivitytaggedoligonucleotidesfollowedbyphotograPhyanddensitometricscanisoftenemployedtomeettheneedsofsuchrequirementS,whichislaborintensive,timec0nsumingandunautomated-CaPillaryelectrophoresis(CE)tendst0beastrongtoolintheanalysis0fDNAfragmentSwiththeadvantagesofhighsensitivity,highres0luti0nandautomation.QuantitativeanalysisofDNAfragmentshasbeendonebysomeauthorsusingC…     

三维曲光轴坐标下的旁轴电子光学

从费马原理出发，应用微分几何的曲线坐标定义，给出了三维曲光轴坐标中电子在旁轴下的一级和二级近似轨迹方程式.借助于对电场和磁场的数值计算，可以分析电磁场分布和电子运动轨迹复杂情况下的电子光学性质.给出了对一种电子束扫描式扁平显像管电子光学系统的计算结果，并给以定性说明. 关键词：     

外延生长YBa2Cu3O7-x超导薄膜的TEM和SEM研究

本文利用高分辨率透射电子显微镜(TEM)和扫描电子显微镜(SEM)对高J_c外延生长YBa₂Cu₃O_7-x超导薄膜的微观结构进行了观察分析.研究发现,薄膜外延程度的好坏与生长工艺和衬底表面的完整性有直接的关系.实验结果表明(100)SrTiO₃单晶衬底上外延生长YBa₂Cu₃O_7-x超导薄膜中影响临界电流密度J_c的因素主要有界面过渡区、缺陷和不同的外延取代等.