查询词典 propagation

A series of experimental studies are carried out to investigate the propagation of an open surface-flaw in gabbro samples under compression load.

采用含张开型表面裂隙辉长岩试样，对单轴压缩荷载作用下预制裂隙的破裂模式进行一系列试验研究。

Sir Francis Galton showed that for statistical purposes -- the main bent of genetics until bioengineering came along -- the propagation of variation within populations could be considered to have a random origin.

高尔顿爵士证明，从统计学的角度——在生物工程学出现之前，统计学是遗传学的一个主流研究方法[1]——可以认为种群内部变异的遗传出自某一随机的源头。

The dissertation focuses on the phenomenon of wave propagation of piezoelectric periodical composite laminated plate. By using the motion equations and Gauss theorem cooperative with constitutive relations of piezoelectricity, the governing equations can be determined.

本文主要是要探讨压电周期叠层板波传现象，所以由本构方程式配合运动方程式和高斯定理以获得统御方程式，此等方程式在周期结构内具有平移对称关系，所以位移场和电位场的形式可以布拉克理论表示，进而得到代表周期结构行为的统御方程式。

By using Zernike polynomials to describe the wavefront distortion of beams, the propagation properties of the flattened Gaussian beams, super Gaussian beams, Gaussian beams and plane waves passing through an aberrated lens or an aberrated annular lens are studied based on the generalized Huygens-Fresnel diffraction integral.

以广义惠更斯—菲涅尔衍射理论为基础，采用Zernike多项式描述像差光束畸变波前相位，研究了平顶高斯光束、超高斯光束、高斯光束以及平面波通过像差透镜和环状像差透镜的传输。

The electromagnetic propagation process of a Gaussian pulse through an unmagnetized plasma photonic crystal is investigated.

它具有一定的光子能带结构，一定频率的光不能在晶体中传播，从而产生了光子禁带。

Based on the method that a rectangular function can be expanded into a sum of complex Gaussian functions with finite numbers, the propagation characteristics of a Gaussian beam passing through apertured spatial filter systems are analysed and the corresponding analytical formulae are obtained respectively.

根据矩形函数可以展开为有限复高斯函数之和的方法，从柯林斯衍射积分公式出发，对高斯光束通过受限空间滤波器传输特性进行分析，得到了相应的近似解析式。利用Matlab对其解析式进行数值模拟，得出一组直观的结果。

Base on the fact that a hard-edge aperture function can be expanded into a finite sum of complex Gaussian functions, the approximate analytical expressions for the propagation characters of Hermite-Guassian beams passing through double rectangular apertured are derived. The approximate analysis uses Collins formula. At last, Matlab illustrates some numerical examples.

基于硬边孔函数能拓展成一组有限复高斯函数的和，研究厄米－高斯光束通过双矩孔的传输特性，用Collins公式分析，用Matlab进行一些数值模拟。

The propagation equations for oblique and off-axial Gaussian beams passing through cat-eye optical lens are deduced by using the theory of matrix optics and expanding the aperture function into a finite sum of complex Gaussian functions.

运用矩阵光学理论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，进一步推导了倾斜离轴高斯光束通过猫眼光学镜头的解析传输公式，通过数值计算分析得到了倾斜系数和离轴量对猫眼效应反射光光强分布的影响规律。

Gaussian beam propagation thus bridges the gap between geometric and physical optics.

高斯光束传播理论因此可以沟通几何光学与物理光学。

By treating photorefractive spatial soliton as rays in geometric optics, the action of the diffusion effect on propagation of PR spatial solitons is analyzed.

把光折变空间孤子看作几何光学中的一束光线，研究了扩散效应对光折变空间孤子传播的影响。

Salt is good, but if the salt becomes flat and tasteless, with what do you season it?

14：33 盐本是好的，盐若失了味，可用什么叫它再咸呢？

He reiterated that the PLA is an army of the people under the leadership of the Communist Party of China.

他重申，人民解放军是在中国共产党领导下的人民军队。