查询词典 scattering

After years of development, Thomson scattering has now become a powerful diagnostic tool of plasma physics.

经过多年的发展，汤姆孙散射已经成为等离子体物理研究中最重要的一种诊断工具。

The smaller the sizes of thediamond grains,the easier the electrins transports in diamond grains due to relativelysmall scattering.So,the ball-like films inlaid with nano-sized diamond grains had goodproperties of field emission.

尺寸越小的金刚石晶粒，电子在金刚石颗粒中由于存在较小的散射，电子的迁移越容易，所以具有纳米尺寸金刚石镶嵌颗粒的薄膜具有较好的场发射特性。

Cornea is a component of the ocular dipotric system, it is the main reflecting interface of the eye, its high diaphaneity is the basis for good visual acuity and inhibiting light from scattering.

作为眼球的屈光系统成分之一，角膜是眼的主要反射界面。角膜的高透明度是抑制光线散射、保持健康视力的重要基础。

Scattering every corners of the world, these diaspora people are the citizen of the world in some sense.

全球化时代的飞散者，已经在某种程度上成为真正意义上的世界公民。

There are two parts in this dissertation. In part one, the reaction scattering for the H3 system is studied using three-dimensional quantum mechanical coupled channel distorted wave approximation. In part two, a new form is proposed for interaction between an atom and a diatomic molecule.

本文分两部分：第一部分用三维量子力学耦合通道扭曲波方法研究了三氢系统的反应散射；第二部分提出了一种原子与双原子分子相互作用的新形式。

The calculated results show that the total differential cross section is the general rule and characteristics of collision between an atom and a diatomic molecule, the phenomenon of the scattering oscillation at large angles is more evident along with increase of the incident energy for low-lying rotational excitation state-to-state differential cross sections in He-BH collision system.

计算结果表明：He-BH碰撞体系的总微分截面具有原子与双原子分子散射的一般规律和特征；随着入射能量的增加，低转动激发态-态微分截面在大角区的散射振荡现象会更加明显。

Objective To study resonance light scattering spectra of diazotization- coupling reaction and establish a new method for the determination of trace nitrite.

目的 研究重氮化－偶联反应的共振散射光谱并应用于亚硝酸根的测定。

Interaction mechanism is studied by using the techniques including absorption, light scattering, circular dichroism and viscosity determination.

利用光散射技术、吸收光谱技术、黏度测定技术、圆二色谱等方法研究了配合物与核酸之间的作用机理。

A simple depth-cueing method to restore a degraded weather image is suggested,based on the dichromatic atmospheric scattering model developed as shown.

介绍了一种简单的基于二色大气模型的退化天气图像复原方法。

In this dissertation, based on the extraction of meaningful polarization information, the polarimetric speckle reduction, polarimetric contrast enhancement, polarimetric classification and ship detection in polarimetric SAR images are systemically studied. During the study, some new concepts and methods are introduced, which are supported by the application to measured Pol-SAR data. The innovations of this dissertation are as follows: 1 A simplified schem is proposed to reduce the complexity of scattering-model-based speckle filtering. 2 Extend the expression of polarimetric correlation coefficient to help distinguishing targets. In addition, introduce the quantized parameters of polarimetric signature so as to show the differentiae in quantity in co-polar power, cross-polar power and shapes of polarization signatures among targets. 3 Define a new parameter of difference degree between targets, which can be used for express the difference between both coherent and distributed scatters.

论文在较系统的研究目标特征量提取方法和特征量所包含的物理意义的基础上，对极化SAR图像降斑、极化对比增强、极化SAR图像分类以及极化SAR图像中海上舰船目标检测等方面进行了研究，并提出了一些新的概念和方法，对实测数据的处理结果表明，这些新的概念和方法对于极化SAR信息处理是有效的，本文的主要创新成果包括以下方面： 1）针对基于预分类的MMSE极化降斑方法实现过程非常复杂的问题，提出了简化方案，并验证了方案的有效性； 2）扩展了极化相关系数的表示方法，这种扩展增强了极化相关系数对目标的区分效果；另外还提出了极化特征图量化参数，可以从量上表征不同目标间相同极化和交叉极化的回波功率差异和极化特征图形状差异； 3）定义了目标间的差异度参数，它不仅可以用于描述相干目标，还可以用于描述分布目标的差别程度。

Aquatic or marsh-growing fern allies; known to have existed since the Cenozoic; sometimes included in Lycopodiales.

生活于水中或湿地的蕨类；从新生代生存至今；有时归于石松目之中。

The engine was uprated from a 90hp Franklin to a 125hp Lycoming.

改良过的引擎是从90hp到125hp莱康明富兰克林。