不散射的

This paper presents a fast algorithm based on the measured equation of invariance.Conformal meshes are made along the surface of two-dimensional scatterer.Renumbering of nodes changed the original sparse matrix into band one,and the consumption of computer memory and CPU time decrease from O(N2) to O.Via this new algorithm,electrically large problem can now be rapidly solved.

提要 本文基于不变性测试方程法提出一种快速算法，在二维散射体表面建立共形差分网格后，通过对节点的重新排序，将原问题中的稀疏矩阵变换为带状稀疏阵，从而使占用的计算机内存和计算时间均由O(N2)下降为O，可以解决原来无法计算的问题。

A true diffusor scatters sound waves in different directions based on their frequency, rather than merely redirecting all waves in the same direction.

一个真正的diffusor散射声波在不同方向的基础上他们的频率，而不是仅仅重定向所有海浪的方向是一致的。

This surface works a bit like a giant radio telescope dish in reverse: Rather than focusing parallel astronomical light rays to a point, it collects the scattered plasmons emerging from a tiny sample--positioned strategically near the mirror--and redirects them into a plasmon "beam" in the metallic plane.

这个表面的工作原理相当于一个倒置的巨型射电望远镜的盘面，不同于天文望远镜把平行的天体光线会聚到一点，这一设计起到的作用是收集从一个位置恰好位于像点的微小样品散射出来的等离激元，并把他们重定向成金属平面上的一个等离激元束。

Under the circumstances of shielding effect of extranuclear electron, the condition of the classics descriptions of Rutherford scattering formula is derived from the principle of uncertainty relation in the quantum mechanics.

用量子力学中不确定关系的原理，推出了在核外电子非屏蔽效应的情况下卢瑟福散射公式的经典描述的条件。

The calculated results show that the CaI vibrational population peaks moved to low value.The calculated cross-section changed slightness duo to isotope effect. The angle product distributions tend to backward scattering also and isotope effect is not observably. Thecalculated

由于同位素效应的影响，产物Cal的振动态分布向低振动态转移；反应体系的散射截面在低碰撞能和高碰撞能处有些微变化；受到反应物质量因子变化的影响，转动取向值减少，产物转达取向强烈；产物的角分布同位素效应不明显。

In this paper, inverse scattering series method is based on wave equation and Born series, multiples are predicted and removed by constructing a subseries corresponding to surface-related multiples. This method does not need any subsurface information and is suitable for different kinds of complex structures.

本文研究的逆散射级数法以波动方程和Born级数为基础，构造一个与自由表面多次波相关的子序列来预测并消除多次波，该方法不需要知道地下的速度结构信息，适用于各种复杂的地下情况。

The proposed scheme is achieved by extracting the support of an indicator function on a sampling domain containing the penetrable object as a visualization of the unknown object where the indicator function has noticeably different values inside and outside the penetrable object.

这个算法的一个特别吸引人的性质是不需要关于障碍物的任何几何和物理的先验信息，并且只需要散射场在某个有限孔径中若干个入射和测量方向上的远场信息，即可得到可穿透目标的一个很理想的可视化。

"Seed material" After a natural sorting, 10 million times in the collision process, the structure does not close, micro-fractured parts of a certain broken, and become a fine sand, leaving behind part of the "tremolite" small crystals is generally felt -like arrangement, and basically no micro-cracks, light scattering, when demonstrated a sense of attractive oil lubrication!

"籽料"经过自然分选，在千万次的碰撞过程中，结构不紧密，微裂隙发育的部分一定破碎了，成了细砂了，留下的部分"透闪石"小晶体一般为毡状排列，并且基本没有微裂隙，对光散射时表现出一种诱人的油润感！

Based on the spectral model of Elfouhaily, the scattering coefficient of sea surface is calculated, and the theoretical results are compared with the experimental data and Kirchhoff approximation with or without shadowing effect considered.

基于Elfouhaily海谱模型，计算了海面的散射系数，将得到的理论计算结果和实验数据及考虑和不考虑遮蔽效应的基尔霍夫近似结果进行了对比。

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。

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。