散射体

The investigations of scattering characteristics about left-handed gratings in present dissertation provide important theoretical guidelines for the design of new frequency selective surfaces,couplers,filters,polarization convertors and electromagnetic absorbers for microwave and millimeter wave applications.

本文对左手介质周期结构散射特性的研究对于设计新的微波毫米波频率选择表面、耦合器、滤波器、极化转换器、电磁波吸收体等方面具有重要的理论指导价值。

The aging process of 18Ni maraging steel have been studied by means of small angle X-ray scattering,Mossbauer spectroscopy and TEM.

尹钟大，李晓东，李海滨，来忠红摘要：采用小角X射线散射、Mossbauer谱、透射电镜方法研究了18Ni马氏体时效钢的时效过程。

ABSTRACT The aging processes of 18Ni maraging steel have been systematically studied by means of transmission electron microscopy, small angle X—ray scattering, M〓ssbauer spectroscopy and atom probe technique.

本文利用透射电镜，小角X射线散射，穆斯堡尔谱和原子探针对18Ni马氏体时效钢的时效过程进行了较为系统的研究。

The Raman measuring results suggest that phonons contribution of surface-interface atoms can be found in 10 nm particles only.

拉曼散射研究结果表明， 10 nm的颗粒只有表面界面原子的贡献，未发现有体相原子的贡献。

Based on EPS particle,sample is made by coating carbon black on EPS particle and the absorbing property of sample is analyzed by law of scattering and cavity resonance theory.

以EPS为基体，在表面涂覆一层炭黑导电层做成试样，依据瑞利散射原理和球谐振腔原理对该模型的吸波机理进行了探讨，为该类吸波球体的实验研究提供了很好的理论基础。

In this paper, based on the frequency-domain processing model of the multi-polarization, low frequency UWB SAR system, with the consideration of the low frequency UWB electromagnetic scattering characteristics of the calibrators, the polarimetric calibration method is proposed.

该文基于多极化低频UWB SAR频域处理模型，考虑了极化校准中定标体的低频超宽带电磁散射特性的问题，给出了极化校准方法。

A novel numerical boundary condition is presented in the paper, which is compared with the method of measured equation of invariance on computational time and memory requirement. It is demonstrated that the new boundary condition is of benefit both on the time and memory, therefore is an efficient method for computation of electrically large dimension objects.

本文给出了一种新的吸收边界条件，并与不变性测试方程法、矩量法在计算时间、存贮空间方面进行比较，结果表明运用这个条件在计算时间和存贮空间上都具有优点，是计算电大尺寸媒质柱体电磁散射特性的一种有效手段。

Using a systematic approach and the concept of ＂pure HOLZ case＂ for electron diffraction,the convergence of the conventional multislice methodand the second-order multislice methodfor calculating higher-order Laue zoneeffects was studied.

高能入射电子与样品的体周期较长，或当晶体较大地偏离带轴时，HOLZ衍交互作用是一个复杂的电子弹性和非弹性散射过射束都会有较大的强度，此时，HOLZ衍射不能忽程。

In this paper, the requirement analysis, design and implementation of the system are introduced in detail.

此论文详细介绍了系统的需求分析，系统设计和具体实现。

In the context of economic globalization is increasingly deepening, China's economy can not be spared.

在经济全球化日益加深的背景下，中国经济不可能做到独善其身。