查询词典 propagation

In order to get more understanding of the propagation behaviour of he delamination, a series of finite element simulations related were done.

然后由实验测得界面裂缝扩展速率和有限元模拟给出的能量释放率，拟合得到可作为倒装焊封装可靠性设计依据的Paris半经验方程。

The product of Fourier series and a finite sum of complex Gaussian functions is used to approximate the window function of a hard-edged aperture, an improved algorithm for the beam propagation through a paraxial ABCD optical system with hard-edged aperture is proposed.

使用傅里叶级数与有限个复高斯函数之和的乘积作为硬边光阑的窗口函数的近似式，提出了含硬边光阑近轴ABCD光学系统对光束变换的改进算法。

By using the method of expanding the aperture function into a finite sum of complex Gaussian functions, approximate closed-form propagation equations of TMn0-Gaussian beams diffracted by hard-edged parallelogram aperture s are derived.

通过将硬边光阑函数展为复高斯函数之和的方法，在直角坐标系下研究了TMn0模高斯光束通过有平行四边形光阑的衍射，得到了近似的解析传输公式。

Based on the Collins formula, the analytical propagation equations for a Gaussian beam through a multiple spatial filter system are derived by using the methods of the matrix decomposition and expanding the aperture function into a finite sum of complex Gaussian function .

以Collins衍射积分公式为基础，利用A0CD矩阵分解与物理实现的技巧，以及将硬边光阑窗口函数展开为有限个复高斯函数之和的方法，推导出了高斯光束通过多级空间滤波器系统的传输方程，并用数值计算加以说明。

In this connection we have not taken account of the inaccuracy involved by the finiteness of the velocity of propagation of light.

关於这一点，我们没有带被光的增殖速度的有限是积极叁与的错误帐户。{关於这一点，我们还没有带被光的增殖速度的有限是积极叁与的错误帐户。

The ignition and its flame spreading test system of the modular charges in the natural environment is built up, a number of ignition and its propagation methods are simulated, the characteristic parameters of the system in the natural environment are obtained.

本文针对刚性组合装药的点传火技术进行了一些基础性试验研究和理论分析，建立了自然环境下刚性组合装药的点传火试验系统，并对多种点传火方案进行了模拟试验，获得了点传火系统在自然环境下的重要性能参数。

Crack propagation from the flameout edge can be modeled by considering an edge crack in the martensite surface from flame cutting.

裂纹从烧割边缘的扩展可模拟为一个从烧割处的马氏体表面起始的边裂纹。

It analyzes the cause of explosion propagation for plane flameproof surface and put forward some preventive measures which are satisfacted to the requirements of relevant standards.

分析了平面隔爆面传爆的一些原因并提出了相应的预防措施，通过这些措施，满足了隔爆要求，达到了防爆的目的。

The refraction, reflection and propagation of the acoustic wave in a rod are studied quantitatively when a line-focused probe is employed in an axial scanning in immersion testing. The shape and position of the first and second focal line of the probe in the cylinder are calculated.

定量研究了采用线聚焦探头、液浸法、轴向扫描探伤时，棒材中声波的折射、反射和传播规律，计算得到了工件中的一次焦线和二次焦线的形状和位置。

It's M2 factor is approaching the ideal value 1 and the beam intensity profile remains Gauss Profile. Laser beam with good propagation and focus characters. The beam can propagate a long way and can be focused with lens with long focal distance. The focal beam waist radius is 134μm, the focal distanced of the focus lens is 300mm. It's focal depth is about 5mm and the focal shift is about 1mm in the range of processing (3m).

结果表明，Slab CO2激光器具有高光束质量，其M2因子非常接近1的理想值；激光束具有良好的传输和聚焦性能，可以长距离传输；使用焦距为300mm的聚焦镜聚焦，聚焦光斑的束腰半径约为134μm，光束横截面能量分布接近理想的高斯分布，焦深约为5mm，在加工范围内(3m)，激光束的焦点漂移量大约为1mm。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。