极化率

A wireless system for use in a low power data communications in a sub-millimeter wave zone includes at least one wireless communications device including a directional antenna whose cross-polarization discrimination is not less than 24 dB, wherein the wireless system uses a plurality of planes of polarization selectively.

一种用于亚毫米波带中的低功率数据通信的无线系统包括至少一个无线通信装置，该无线通信装置包括交叉极化鉴别率不小于24dB的定向天线，其中，该无线系统有选择性地使用多个极化面。

Based on a new Dias model of electromagnetic responses, polarization and non-polarization apparent resistivities and phase curves are respectively calculated in a 3 layer model.

基于岩矿石激电响应的Dias，新模型，分别计算了3层模型的中间层在有极化与无极化2种情况下的视电阻率和相位曲线。

Polarization curve and constant potential polarization experiments showed that AE events rate is linear to polarization current density.

极化曲线和不同恒电位下极化的声发射测量显示，声发射事件率与极化电流密度近似成线性关系，说明无论是阳极溶解还是铝合金的阴极腐蚀都是重要的声发射源。

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。

Geophysical method displays two information models:① high resistivity, high polarization, low K, relative low magnetism and low total counts, which correspond to silicic alterative zones;② low resistivity, low polarization, high K, relative high magnetism and high total counts, which correspond to quartz porphyry intrusive body.

地球物理测量结果显示两种信息模式：①高阻、高极化、相对低磁、低K和低总计数率在空间上对应硅化蚀变带地段；②低阻、低极化、相对高磁、高K和高总计数率对应于石英斑岩侵入体地段。

The third-order nonlinear optical response in organic molecules and its theoretical calculation methods and experimental measuring techniques are reviewed.

综述了有机分子三阶非线性极化率的计算方法和实验测量原理与技术。

They were chosen in this study to calculate the molecular geometries, electronic structures, and IR spectra of a series of Pcs having different centers or/and different substituents on the benzene rings. CPHF and ZINDO are the most popular methods to study the non-linear optical and excited state properties, respectively.

ZINDO和CPHF分别是计算激发态和NLO极化率的最常用方法之一，本文用ZINDO计算了部分化合物的激发态，得到了紫外可见光谱图，用CPHF/3-21G方法研究了近20个不同取代基和不同金属的菁化合物的NLO性质。

They were chosen in this study to calculate the molecular geometries, electronic structures, and IR spectra of a series of Pcs having different centers or/and different substituents on the benzene rings. CPHF and ZINDO are the most popular methods to study the non-linear optical and excited state properties, respectively.

ZINDO和CPHF分别是计算激发态和NLO极化率的最常用方法之一，本文用ZINDO计算了部分化合物的激发态，得到了紫外可见光(来源：Aeb8bBC论文网www.abclunwen.com)谱图，用CPHF/3—21G方法研究了近20个不同取代基和不同金属的酞菁化合物的NLO性质。

A Kerr medium,which possesses a third-order nonlinearity,can modulate the phaseof a field,and play a critical role on the respects of quantum statespreparation,quantum nondemolitionmeasurements anddecreasing quantum noise,and so on.1990,Buzek combined thetwo kinds of basic model together,and presented Jaynes-Cummingsmodel with a Kerr-like medium.He found that a Kerr-like mediuminfluences the statistics properties of the standard JCM greatly.1992,Amitabh Joshi and R.R.

克耳介质具有三阶非线性极化率，基本作用在于调制腔场的位相，近年来在量子态制备和非破坏性测量以及减少量子噪音等方面日益发挥着相当重要的作用。1990年Buzek把这两种基本模型结合在一起，提出了含有克耳介质的Jayness-Cummings模型，并研究了克耳介质对JCM统计特性产生的影响。1992年Amitabh Joshi和R.R。

Using optical Kerr effect, the third-order susceptibilities of the ternary films over a wide range of Mg concentrations were determined.

不同组分的MgZn(下标 1-x)O薄膜的三阶非线性极化率采用光克尔效应技术测试获得。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。