查询词典 scattering

According to the principle of electronic holography using ultrashort laser pulse for imaging through highly scattering media , an electronic holography system is established which is suitable for imaging through highly scattering media .

根据超短脉冲激光透过高散射介质成像的电子学全息原理，建立了一套完整的适用于透过高散射介质成像的电子学全息系统。

ABSTRACT The dissertation consists of the polarization theory and the scattering theory of polarization including the exact solution for the scattering of plane wave by a chiral elliptic cylinder and the polarization of scattered wave.

本文主要研究了极化理论及目标的极化散射特性，包括研究旋波媒质的电磁极化散射特性，首次给出了旋波媒质椭圆柱散射问题的精确解析解，同时对其散射的极化特性进行了分析。

The time-domain response of the induced currents on a scattering object irradiated by a plane wave with a Gaussian pulse in time is expanded as an associate Hermite series in this paper. Using the isomorphism of the associate Hermite function and its Fourier transform, the frequency-domain information can be obtained similarly to the time-domain expansion. According to the corresponding relation between time-domain analysis and frequency-domain analysis, and using the early-time response and the low-frequency information of the induced currents, the non-known coefficients in the expansion series can be decided. The entire responses of the induced currents on the scattering object in both time and frequency domains can be obtained at one time by simultaneous extrapolation computation using both the early-time response and the low-frequency information of the induced currents.

摘要首先根据散射体在高斯脉冲平面波激励下感应电流的能量几乎全部集中在时间轴和频率轴上的有限范围内，该文将时域响应展开为系数待定的连带Hermite级数的叠加，并根据连带Hermite函数的傅里叶变换的自反性，得到与时域响应形式类似的频域响应；然后利用时域方法和频域方法分别计算散射体上感应电流的早时响应和低频信息；最后经过时域和频域联合外推计算，由早时响应和低频信息确定时域和频域响应的待定系数，从而获得了整个时域和频域的完全响应。

C Thermally controllable light valves:As described above, the clearing temperature of PDCLCs can be increased by UV-curing because of the reduction of impurity concentration. Therefore, when the texture of a CLC cell in the UV-cured region are changed to focal conic one, the scattering of light from the sample is maximum. However, the clearing temperature of PDCLCs can be increased continually with continually irradiating with UV light onto the sample, but the scattering is unchanged.

当PDCLC照射紫外光的时间超过某一特定时间，则表面配向被聚合物薄膜破坏而达成散射态之穿透度最低状态，若持续照光聚合时，因仍然处於focal conic态，故穿透度不再改变，但单体聚合造成相变温度上升，直到单体全部聚合为止。

In this paper, the size and structure of the uniplanar scattering-field capacitance sensors are optimally designed by simulation and experiment for test depth and testing feature with guard electrode for improving the anti-disturbance capability. A new uniplanar scattering-filed capacitance sensor for measuring water in building inclosure is designed based on improved charge/discharge capacitance measuring circuits. This kind of sensor has wide test depth and high sensitivity.

针对围护结构含水率测试深度的要求和测试特点，本文通过仿真和实验，对同面电容传感器探头的结构尺寸进行了优化设计，并采取了保护电极以提高其抗干扰能力；运用改进的充放电电容检测电路，设计出一种测量围护结构含水率的新型同面散射场式电容传感器，该传感器具有宽范围的测试深度和较高的测试灵敏度。

Under the action of the femto-second laser, when the multi-photon nonlinear Compton scattering takes place in the linear plasma, the effects of the femto-second coupling laser field formed by the scattering laser and incident laser on the light field and electron density profile in the linear plasma have been studied using the model of the inelastic collision between the electron and multi-photon group and the model of the cold plasma.

应用电子和多光子集团非弹性碰撞模型和冷等离子体模型，研究了飞秒强激光与线性等离子体发生多光子非线性Compton散射时，散射激光与人射激光形成的飞秒耦合激光场对线性等离子体层中光场和电子密度分布的影响。

The research achievement are acquired as follows: 1From mathematical models for inverse scattering in two dimensional homogenous media including Dirichlet, Neumann, Robin,all kinds of probable mixed boundaries and cracks, direct and inverse scattering are discussed, and ill-posed integral equation and indicator function method are formulated for the diverse of boundary identification. It is shown that the kernel of the integral equation characters the boundary of scatterer, which is determined by solving it by virtual of regularity method, meanwhile, some numerical tests are given.

本研究取得了如下研究成果： 1）在二维均匀介质逆散射各种边界识别的数学模型（包括Dirichlet，Neumann，Robin，各种可能的混合边界问题，裂纹问题）下，分别考虑了正散射问题和逆散射问题，推导了上述各种边界识别的不适定积分方程以及指示函数方法，由于积分方程的核充分表征了散射物的边界，由此说明只要利用正则化方法求解该积分方程，就可以确定散射物的边界，并给出了一些数值实验。

The x-y spatially-resolved mapping of polarized Raman scattering spectra from a single tetrapod-like ZnO nanostructure were proposed and performed, with different polarized scattering configuration by utilizing the intrinsic geometry configuration.

此外，通过对量子线的磁阻测量，揭示一维结构中载流子在磁场中的输运行为。 2。首次根据四角晶须状ZnO纳米结构的天然的空间几何构型，采用不同的Raman散射配置，研究单个纳米结构的具有高空间分辨率的偏振Raman二维扫描谱。

Compared with the other image projection analysis methods, the proposed method has the following properties:（ 1 ） the scattering matrices are directly based on image matrices;（2） the efficient projection vectors are statistically uncorrelated;（3） the within scattering matrix is not necessarily invertible and some matrix inversions are not performed.

在ORL标准人脸库和NUST603人脸库上的试验结果表明，上述图像投影鉴别分析方法在识别性能上较以往的方法有一定的提高，尤其是特征抽取的速度有明显的提高。

Performance of dual-polarization SARs to distinguish three basic scattering mechanisms from an isotropic surface, a dipole, and an isotropic dihedral is studied theoretically. Performance of dual-polarization SARs to identify the eight scattering mechanisms inside the feasible region in H-αplane is analyzed, and a feasible division of H-αplane for HH-VV dual-polarization SAR is obtained in an experimental manner.

推导了双极化H-α平面有效区域的边界，从理论角度研究了双极化SAR对各向同性表面、偶极子和各向同性二面角三种基本散射的识别能力，通过实验分析了双极化SAR对H-α平面有效区域内八种基本散射机理的识别性能，并给出了HH-VV双极化H-α平面的一种可行划分方式。

Now she was hungry and angry.She began to smoulder.

现在她又饿又气，她开始流露难以抑制的怒火。

You have placed our iniquities before You, Our secret sins in the light of Your presence.

诗90：8 你将我们的罪孽摆在你面前、将我们的隐恶摆在你面光之中。