截面

On the base of the single-diameter laser-scanned measuring technology, a double direction laser-scanned measuring system is presented. Which combinate the laser-scanned measuring technology with special optical system. In the system, the collimation semiconductor laser-scanned beam scanning two perpendiculars direct of one plane of the measured workpiece at the same time is made. The beams with the dimension information of two perpendiculars direct are processed by the scanning receive system, the high-speed photoelectric transition and electronic data process. Two measured results of the diametric directs and ellipse tolerance,etc, parameter, of the turning workpiece on the same plane are obtained by non-contact automatic measurement. The problem of non-contact measurement of two perpendiculars direct of one plane of turning workpiece is settled. It processes many peculiarities, such as high speed, high accuracy and non-contact automatic measurement, etc.

在单向激光扫描检测技术的基础之上，提出了一种双向激光扫描检测系统，其采用激光扫描检测技术与特殊光学系统相结合，用准直半导体激光扫描光束对被测工件径向某一截面的两个相互垂直方向同时扫描，经扫描接收光学系统、高速光电变换、电子学系统和微机数据处理系统，对将携带有垂直方向被测量信息的光束进行处理，实现了回转体工件同一截面两个垂直方向的径向尺寸和椭圆度等参数的非接触自动测量，解决了同时非接触测量回转体零件同一截面两个径向尺寸的难题，它具有高速，高精度和非接触自动测量等特点。

In the system , the collimation semiconductor laser - scanned beam scanning two perpendiculars direct of one plane of the measured workpiece at the same time is made . the beams with the dimension information of two perpendiculars direct are processed by the scanning receive system , the high - speed photoelectric transition and electronic data process . two measured results of the diametric directs and ellipse tolerance , etc , parameter , of the turning workpiece on the same plane are obtained by non - contact automatic measurement

在单向激光扫描检测技术的基础之上，提出了一种双向激光扫描检测系统，其采用激光扫描检测技术与特殊光学系统相结合，用准直半导体激光扫描光束对被测工件径向某一截面的两个相互垂直方向同时扫描，经扫描接收光学系统、高速光电变换、电子学系统和微机数据处理系统，对将携带有垂直方向被测量信息的光束进行处理，实现了回转体工件同一截面两个垂直方向的径向尺寸和椭圆度等参数的非接触自动测量，解决了同时非接触测量回转体零件同一截面两个径向尺寸的难题，它具有高速，高精度和非接触自动测量等特点。

The differential scattering cross sections, partial wave scattering cross sections and total scattering cross sections for collisions between He atoms and HCl molecules are calculated by using CC(Close-Coupling) method under three different potential models, respectively. And the results of the calculation are compared detailedly.

针对He-HCl碰撞体系的三种不同势能模型，采用公认的精确度较高的CC近似方法，分别计算了He-HCl体系的微分散射截面、分波散射截面和总截面；并对计算结果进行了比较和详细地分析。

Therefore, accurate experimental data, such as cross sections,differential cross sections and double differential cross sections, are very important inapplications, at the same time they can be used to test and improve nuclear model andhelp us to understand nuclear reaction mechanism better.

因此，对反应的反应截面、微分截面和双微分截面进行准确地测量，既可为实际应用提供可靠的数据，同时又可检验和改进现有的模型理论，有助于进一步了解核反应机制。

The results show that, both normal and tangential blowing are effective means of flow control, the influence of blowing on the cone-cylinder is strongest, followed by the influence of blowing on the elliptic forebody and on chine forebody.

实验表明，法向吹气和喷管切向吹气都是有效的控制手段，吹气对其中圆锥截面模型的影响最大，椭圆截面模型次之，对带棱截面模型影响最小。

Although the hyperboloid is different from η-ξ spacetime in their global struc-tures, it has two of its cross sections equivalent to the Euclidean and the Lorentziansections respectively.

这个超旋转双曲面与η-ξ时空的整体结构不同，但它的两个截面却分别等价于η-ξ时空的欧氏截面和洛伦兹截面。

Meanwhile, the influence of the main parameters on longitudinal metallography of fiber is analyzed.

文中深入地分析了金属长纤维横截面的形成机理，给出了上述各主要工艺参数对纤维横截面卷曲程度和纤维横截面金相组织的影响趋势，同时还分析了各主要工艺参数对纤维纵向金相组织的影响情况。

While the experimental side force distribution over a slender body with a blunt ogive nose is basically consistent with the curve of the analogy predicted, and the characteristic points and half cycle of the experimental curve are basically constant with the roll angle changing 360°. But the local maximums in the curve are not the results as the analogy predicted, which is an important flow feature of 3-D slender body than that of 2-D cylinder.

而钝头拱形细长体在大迎角下的截面侧向力分布与脉冲起动横流比拟方法预测的侧向力曲线的形状是基本相同的，而且随着滚转角旋转360°，截面侧向力分布曲线的特征点和半周期基本保持不变，即它们都基本上不受滚转角变化的影响；但是截面侧向力分布曲线极值点形成的原因却是不同的，这是细长体绕流区别于二维圆柱绕流的一个重要特性。

Compared with GDQR and FEM, the error of displacement was 2.4 percent and the error of force was 4.2 percent in the solutions.

介绍了广义微分求积法的一般原则，对比了用传统DQ法与GDQR在处理截面突变问题中的优劣，研究了用DQ法试解静水压力作用下变截面环向加箍贮液罐圆筒问题，由于变截面处的奇异性问题，所得到的结果不收敛，而采用GDQR重解该问题则得到收敛解。

The formula of normal cross section bending resistance bearing capacity based on the assumption of plane deformation of the cross section, and the formula of oblique section shear bearing capacity according to its composition and deformation are suggested.

在平截面假定的基础上，提出了两者正截面受弯承载力公式；按墙体组成材料对抗剪承载力的贡献，提出了墙体斜截面受剪承载力公式；同时还提出了墙体侧向变形的计算公式。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。