查询词典 distributions

It is found that the angular distributions of electrons are varied by changing the relative phase between the bichromatic laser field, they show a strong phase dependence and also they appear inversion asymmetry, jet and broadding phenomena.

研究发现光电子角分布有强烈的位相依赖关系，且呈现出反演不对称性、喷射结构和展宽结构等现象。

Using a nonperturbative scattering theory developed by Guo,Aberg and Crasemann the angular distributions of electrons in above threshold ionization of Krypton atoms irridated by a bichromatic phase-controlled laser field of linear polarizations is studied. The bichromatic phase-controlled laser field is composed of a sequence of identical one-cycle laser pulses.

采用基于Guo， Aberg 和Crasemann发展的强激光场中的非微扰量子散射理论，研究了线偏振双色激光场中氪原子阈上电离的光电子角分布，双色激光场由一系列相同的单周期激光脉冲组成。

The BRG encompasses a broad range of biogeographical content focussing upon the study of plant and animal distributions and their geographical relationships with the environment. This includes aspects of ecology, biodiversity, landscape ecology, palaeoecology, environmental resource management, and includes human-environment relations.

该研究组致力于动物、植物地理分布以及它们与环境的地理关系的研究工作，涉及的学科范围包括生态学、生物多样性、景观生态学、古生物学、环境资源管理、人与环境关系。

In chapter one, we review recent developments on bivariate distributions and bivariate copulas.

中文摘要在第一章，先回顾目前一些二元分布和二元机率结合函数相关的定义、主要定理，及目前的发展概况。

In particular, we propose conditional correlations with a bivariate hyperbolic distributions method to dominate GSV hedge ratios.

特别的，我们提出在双重双曲线分配方法下的条件关系系数，并且应用在控制广义的半变异数期货避险值上。

Most significantly the site provides a number of slide images on the following subjects: Isograds and chemical reactions in regional metamorphism, chemical reactions in rocks, interplay of nucleation and growth, the origin of porphyroblasts, crystal size distributions, feedback mechanisms, the metamorphic aureole of the Bushveld Complex and reconciling theory and observation, the critical overstep for andalusite growth.

网站还提供了一些重要的幻灯片图片，内容涉及到：等变质级、局部变质化学反应、岩石化学反应、晶核形成与发育的相互关系、斑状变晶起源、晶体大小分类及红柱石发育限度评估。

The effect of zeolites ion-exchanged by transition metals on thermal catalytic cracking reaction is studied. The product distributions of the cracking reactions catalyzed by theβor ZSM-5 zeolites exchanged with transition metals are different from that catalyzed by corresponding Hzeolites, which means the mechanism of cracking reactions has varied. Group Ⅷ metals Fe, Co, Ni and Cu, Zn are shown to be of strong catalytic activity of oxidative dehydrogenation, while Ti and Cr are not of oxidative activity. Catalyzed by zeolites or catalyst containing Ag, conversion of thermal catalytic cracking reactions and the yield of ethylene increase while the yield of propylene does not decrease. Silver can not only promote the formation of carbonium ion, but also convert carbonium ion into free-radical via redox reaction. The weak adsorption of olefins on silver reduces the occurrence of hydrogen transfer and dehydrogenation. As a result, the yield of light olefins is favored by silver in the catalyst.

采用过渡金属交换的分子筛作为催化剂，进行催化热裂解制取乙烯的反应，研究发现，在β沸石分子筛和ZSM-5分子筛中引入过渡金属后，催化热裂解反应的产物分布与相应的氢型分子筛相比有了较大的变化，说明过渡金属的加入对于催化热裂解反应的机理具有影响，Ⅷ族金属如Fe、Co、Ni和第Ⅰ、Ⅱ副族Cu、Zn表现出较强的氧化脱氢活性，产物中氢气、焦炭的产率很高，Ti、Cr则未表现出氧化作用：分子筛及催化剂中引入银后，催化热裂解反应的转化率和乙烯的产率有了提高，丙烯产率没有很大的变化，说明银在催化热裂解反应中能够促进正碳离子的生成，又有可能通过氧化-还原作用部分改变反应机理，促进了自由基的生成，并且由于银对烯烃的吸附很弱，其氢转移反应和脱氢、加氢活性比较低，有利于烯烃产率的提高。

Methods Six adult red-latex injected cadaver hands were used to study the artery sources, routes and distributions on dorsal-ulnar area of the metacarpophalangeal and carpometacarpal joint of thumb.

方法6只成人红色乳胶灌注手标本，观察拇指腕掌关节、指关节尺背侧区动脉的来源、行及其分布。

Fossil history Modern and geological distributions of Castanopsis are studied based on published data and herbarium specimens as well as fossil records .

根据文献资料和标本馆及化石记录，讨论了壳斗科栲属植物的现代分布和地史分布。

Current distributions in a cathodically protected crevice between a simulated coating and segmented mild steel electrodes were measured in diluted NaCl solutions. The effects of the control potential, solution conductivity and crevice thickness on the current distribution were studied.

1前言在联合采用绝缘覆盖层和阴极保护技术防止土壤或水中的钢结构，特别是地下油气管线外壁腐蚀的情况下，阴极保护能否完全防止剥离覆盖层下的缝隙腐蚀成为近些年来阴极保护领域的一个研究热点［'］。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！