查询词典 potential scattering

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。

By introducing the Kronecker product into the frequency domain and employing the concept of scattering fading weight factor,an outdoor broadband MIMO scattering-distribution model is derived.

该方法把克罗内克积应用到频域，同时提出频域散射衰落加权因子的概念，由此导出一种室外宽带MIMO散射分布模型。

The linear sampling method for the inverse scattering problem of acoustic waves is based on the fact that: a linear integral equation of first kind-far field equation including a parameter has an unbounded solution as the parameter approaches the scattering boundary from inside.

本文在此基础上就Dirichlet边界条件的声波反散射问题，利用积分方程理论严格证明了线性抽样方法对其的可用性，具体数值例子表明该方法是有效的。

The results shows that the effect of the speckle noise can be suppressed by displaying OCT images in the logarithmic scale and the speckle properties are correlated with the scattering properties of the tested sample. Additionally, it is shown that OCT with NA = 0.25 has a lower speckle noise and a larger length of single scattering range.

结果显示采用对数表示可以抑制散斑噪声对图像对比度的影响，而且此时的散斑特性与介质的散射特性相关联，另外，采用较高数值孔径显微物镜可以抑制散斑噪声以及增大成像深度。

Chapter 2: The chapter concentrates on the powerful instrument in studying the carrier transport properties—thermopower.. Starting with the base theory, the chapter discussed the thermoelectricity phenomenon in metal and semiconductor in detail, including the useful Mott formula, phonon drag effect (normal process and Umklapp process), abnormal thermopower in transition metal, two-band model, magneton scattering, and so on. To resolve the abnormal thermopower in low temperature, some theoretical models, such as the distortion of Fermi surface, resonant scattering, spin-bag model, were argued. Each of them has its limition.

第二章：对热电势这一研究物质载流子输运性质的手段进行了综述，从热电势的原理和基础理论研究开始，针对金属和半导体的热电势现象进行了详细讨论，包括研究工作中常用的Mott公式、声子曳引的正常过程和Umklapp过程、过渡金属异常的热电势现象、双带模型及磁子散射机制等等，对于低温下的异常散射机制讨论了声子曳引、费米面畸变、共振散射机制、自旋口袋模型等若干种理论模型及其局限性。

If it avoids scattering over one mean free path, the odds favor scattering by the time it traverses another mean free path, and so on.

如果光子在一个平均自由路径中不被散射掉，它也会在第二个平均自由路径中或以后的平均自由路径中被散射掉。

The results show that fibers in China and Japan have some differences in micropore structure by comparison of their power and angles of scattering.Japan's fiber have more powerful scattering.

实验结果表明，通过散射强度与角度的曲线对比，说明了国产丝和日本丝在微观孔洞上的差异，日本丝从原丝到碳丝的散射强度都高于国产丝。

In order to measure scattering rate and judge optical properties of a laser mirror film,a setup with a photoelectric systen and a spherical mirror as a convergence element is developed.It is used to measure the film scattering in a relative measure method.

为了测量激光反射镜薄膜的散射率，评定激光反射镜薄膜的光学性能，研制一种以球面反射镜为聚光元件和利用光电接收转换系统通过相对测量方法测量薄膜散射的装置。

Taking the Kubelka-Munk laws as foundation,the light interaction of ink and paper by existing models has been analyzed,including surface reflection of ink and multiple intemal reflection of paper,and light absorption and scattering and so on,the Clapper-Yule color prediction model has been modified aiming at the two possibilities of long and short distance of light scattering in newspaper.

以Kubelka-Munk定律为基础，研究了油墨、新闻纸在印刷中墨层的表面反射、承印物纸张内的多重内反射、墨层内光的吸收和散射，针对其中的光散射距离的长短两种可能，修正了Clapper-Yule颜色预测模型，引入代表长短光散射距离的比例系数h，建立了新的颜色预测模型，计算得到h=0.43。

Furthermore, the point scattering model is given to form basic scattering structure of the distributed target, and the multiplicative noise model is used to describe statistical characteristics of the distributed target simulation, and illustrate that the spaceborne SAR raw signal is a process of the multiplicative noise.

经过进一步分析研究确定了采用点散射模型来形成目标仿真的基本散射结构，同时应用乘性噪声模型来描述分布目标的统计特性，指出星载合成孔径雷达的目标回波是一个乘性噪声过程。

In the days of sailing vessels the crew were afraid they would be becalmed on the ocean.

在使用帆船的时代，船员们担心他们会因为无风而无法在海洋上航行。

As long as foreign donors pay the PA's salary bill, few expect a new intifada.

只要外国继续为巴权力机构的薪水买单，希望发动新暴动的人便寥寥无几。