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The absolute differential cross section of e-Ar scattering with one-, two-, and three-photon exchange at scatering angles 1°～26° are calculated.

利用第二玻恩近似方法对激光场中e-Ar的散射进行了研究，计算了散射角为1°～26°，交换多个光子的微分散射截面。

When the impact energy is high, the differential cross section for a geometry of the polarization parallel to the incident direction at large angles goes up, which seems different from the usual scattering.

在大角时，平行于入射方向极化的Ps微分截面随散射角增大而增大，这似乎不同于通常的散射。

The calculated double differential cross section of the new model is compared with experimental data and previous SCDW calculations with single particle model. The calculated cross sections are larger than those given by previous calculations at backword and forward angles and smaller than those given by previous calculations near the quasi-elastic scattering angle. The agreement with experimental data is much improved.

新模型的双微分截面计算结果与实验值以及以前采用单粒子壳层模型时的计算结果进行了比较，表明CDFM模型的引入对SCDW模型的计算结果有较大的改进，使其在大角度和极小角度区域有所增大，在准弹性散射角附近有所减小，从而能更好地与实验值相符合。

Or the the ratio of far field divergence half angles defined by second moment and differential operator.

或以二阶矩和微分算子定义的远场发散角半宽度的比值。

It is a knowledge-based potential and consists of two characteristics: protein main chain polar fraction and dihedral angles.

利用蛋白质主链的极性分数及主链二面角为参量，构建了一种基于蛋白质结构数据库的势函数。

This is a very first bottom of the sea diorama I've made, having thought long and easy over the problem, encasement on 3 sides should give a good impression of under the waves, the diver with no bubbles was a disappointment, I asked and got several replies on this problem as to the colour of the seabed, so going with a mix of sand and mud, I thought this would cover most of the angles.

这是我做的最早的海底场景，考虑了很久，易于问题，三面装箱应该提供一个好的水下效果，潜水员没有气泡令人失望，在这个问题我询问并获得若干的答复，如海床的颜色，与之相配的沙子和淤泥，我认为这将涵盖了最多的角度。

In this paper, a simple calculating method to establishthe interconversion between Eulerian angles and direction cosine by Spherical Trigonometry is presented.

为了从多个角度使用不同的手段研究旋转变换问题，本文提供了一种非常直观、简捷的计算方法，即利用"球面三角"的方法建立了用欧拉角与用方向余弦描述三维图形旋转变换的转换关系。

The so called indirect integral operation means that Eular angles can be gotten from the direction cosine matrix which is received by the integral operation of quaternions or direction cosine.

飞行器导航中，姿态角的获取可以通过直接或间接的积分运算求得的，所谓间接获取即是指通过四元数或方向余弦的积分运算求得姿态矩阵，再从姿态矩阵中提取姿态角。

Several common description methods for rotational kinematics are discussed in control point, such as direction cosine matrix, Euler angles, quaternions and Rodrigues/Modified-Rodrigues parameters. Transformation relationships, advantages and disadvantages among those methods are discussed.

从控制角度综评方向余弦、欧拉角、四元数和Rodrigues/修正Rodrigues参数几种常用姿态描述动态方程，指出各种方法的优缺点，及相互转化。

The end surfaces are at angles other than normal to the direction of light propagation.

端表面不垂直于光传播的方向。

Foods high in this vitamin include oily fish such as salmon, tuna and, and fish liver oils.

维生素D含量高的食物包括诸如大麻哈鱼、金枪鱼和鲭鱼之类的油鱼以及鱼肝油。

We need you to cosign our public letter demanding that press intimidation cease immediately, and that all charges be dropped.

我们需要您cosign我们的公共信，要求记者立即停止恐吓，并要求所有收费下降。