散射

Introduce the principle of light absorption and scattering, which is the theoretical basis of turbidimeter works and understand the basis of photology further.

本文介绍了光的吸收定理和散射定理——这是浊度仪之所以能够分析并检测浊度的理论基础，通过分析进一步加深对浊度仪工作原理的了解。

In present work, the photoluminescence and Raman spectra were discussed in three aspects

本文就低维条件下的ZnO发光及Raman散射的特性进行了讨论。

The moment method and physical optics are employed to compute the scattering field of slots and metal plate respectively.

缝隙和金属平板的散射分别采用矩量法和物理光学法得到。

The EM scattering and diffraction field of each element is computed by using physical optics and physical diffraction theory.

利用物理光学法和物理绕射理论计算目标每一单元的散射场和绕射场。

The physical optics method is used to analysis the electromagnetic scattering fromelectric-large size radome-enclosed antennas.

应用物理光学法对电大尺寸带罩天线的散射特性进行分析。

Then, the radar cross section of a metallic target coated with chiral medium is calculated by the physical optics method.

然后，采用物理光学法计算了电大尺寸金属目标在涂敷手征媒质情况下的雷达散射截面。

College of Electronics and Informatics, Wuhan University, Wuhan, 430079Abstract: In this paper, the fractal function with Pierson Moskowitz spectrum was used to describe the dynamic rough sea surface.

本文建立了考虑Pierson Moskowitz谱分布的动态分形海面与目标的电磁散射模型。

Describe a device for measuring scattering flux from leaves in the plane of incidence.

本文描述了用于测量叶片反射光和透射光散射分布的实验装置。

In this chapter, three kinds of target recognition methods are performed, which are:①Target recognition method based on the description of polarization parameter plane. The echo polarization states of target are projected onto the polarization state plane described by the ellipticity ε and the tilt angle τ of the polarization ellipse, the change of parameter following ferquency becomes the chart. According to the changing trait of the chart, the multidimensional polarization feature space of target has been contructed. Furthermore, a series of polarization feature parameters used in designing the structure of target recognition device are extracted, and they are insensible to the posture of target.②Target recognition method based on the description of Poincare polarization sphere. The echo polarization states of target expressed by Stokes vector are projected onto the Poincare polarization sphere. The conception of polarization ferquency stability, which is used in describing the dynamic distribution characteristics of the target echo polarization states on Poincare polarization sphere, has been defined. A group of polarization feature parameters used in designing the structure of target recognition device are extracted, and they are insensible to the posture of target.③Target recognition method based on the description of frequency sensitivity. In accordance with the conception of the polarization state distance defined on Poincare polarization sphere, the frequency sensibility of the physical structure property of target has been investigated, the frequency distribution feature curves in PSD domain are obtained, and targets'features are extracted by means of the curve-fitting method with Least Square Criterion.

这章具体研究了基于三种极化散射特性描述的相应的目标识别方法：①基于极化参数平面描述的目标识别方法，将目标回波极化状态投影到以极化椭圆参数，即椭圆率角ε和倾角τ表征的极化状态平面上，参数随观测频率的变化就形成了图，根据图的变化特点构造了目标的多维极化特征空间，并提取了不敏感目标姿态变化的极化特征参数组来设计目标的识别器结构；②基于Poincare极化球面描述的目标识别方法，采用Stokes矢量表征目标回波的极化状态，并将其投影到描述极化状态的Poincare极化球面上，定义了极化频率稳定度的概念用以刻画目标回波极化状态在Poincare极化球面上的动态分布信息，提取了准方位不变性的目标极化特征，最后设计了目标的识别器结构；③基于频率敏感性描述的目标识别方法，通过在Poincare极化球面上所定义的极化状态距离的概念，研究的是复杂目标物理结构特性对探测信号频率的敏感程度问题，获得了在极化状态距离下的频率分布特性曲线，采用最小二乘估计曲线拟合方法，它既用于极化特征的降维，同时又直接将拟合参数作为目标的分类特征。

Glucose molecules rotate the polarization plane and induce changes in backscattered Mueller matrix patterns.

葡萄糖使得偏振光的偏振面发生旋转，从而影响介质的后向散射米勒矩阵。

He knows that he's one of the mostdominant players in the NBA right now.

我知道他现在是联盟里最有统治力的球员之一了。

Using analysis method of BCG , the dissertation analyzed the management of voluntary service organizations .

利用BCG分析方法对我国的志愿服务组织管理进行了分析。