波前

More practical ray tracing methods currently include the wavefront method, the shortest path method, the travel time epenthesis method, the eikonal equation finite difference method, etc.

当前实用性较强的射线追踪方法，包括波前法，最短路径法，走时插值法，程函方程有限差分法等。

Peak intensity exceeding 10^(21) W/cm2 or even 10^(22) W/cm2 can be expected with smaller f-number focusing configuration and wavefront correction.

我们期望采用更小的聚焦比数的聚焦系统和波前修正系统，使激光的功率密度超过10^(21)W/cm2甚至达到10^(22) W/cm2。

Using scalar diffraction theory, Fresnel diffraction and the realization of Fraunhofer diffraction of light waves of wave-front propagation and the application of digital holography to help.

详细说明：采用标量衍射理论，实现菲涅尔衍射和夫琅禾费衍射，对光波的波前传播和数字全息的应用有帮助。

The formula of numerical computing is presented with discretion for Fresnel diffraction and phase numerical reconstruction of wave front.

从光的菲涅耳衍射、波前相位重构入手，对连续信号进行了离散化处理，给出了数值计算公式。

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 structure function of residual wavefront phase perturbation compensated by an adaptive optics system has been derived by means of frozen turbulence hypothesis and geometric optics approach.

在采用冻结湍流假设和几何光学近似的条件下，得到了经自适应光学系统校正后的剩余波前相位扰动的结构函数。

Base on the experiment on the optical table, two setups are designed to diagnose plume in vacuum box.(4) Foundation information of MATLAB program is presented. Light wave front and light wave linearity transfer are simulated by using MATLAB. And the pole, globosity and cone plasma field interference figures are simulated by MATLAB, and reference fringe is added to the interference.

介绍了MATLAB语言的基础知识，MATLAB实现光波波前以及实现光波的线性传输的方法，并通过编写程序对各种不同的等离子体模型进行模拟，得到了柱状、球状及锥体时候的干涉图像，并可以在干涉图像中加入参考干涉条纹，可以直接得出相位差。

In chapter 4, the influence of the wave-front curvature of Raman pulses on the measurement precision of gravitational acceleration in atom interferometers is analyzed with the method of a transmission matrix. It is shown that the measurement precision of gravitational acceleration is highly dependent on the spot size of the Raman pulse, the temporal interval between Raman pulses and the optical path difference of the two counter-propagating Raman pulses.

第四章运用高斯光束传输矩阵的方法计算了原子干涉仪实验中拉曼光束波前弯曲对重力加速度测量精度的影响，得出了精度与拉曼光束光斑大小，拉曼脉冲作用的间隔时间，以及拉曼光束光程差之间的关系。

It is showed that the optimal mode number was associated with the signal to noise ratio, and the Hartmann sensor was suffered from measuremen...

分析了一个哈特曼传感器对实际大气湍流畸变波前的测量结果，给出了确定传感器测量噪声的方法。

The method can be used to measure directly the high power laser beam with large diameter.

文中给出了这种重构波前方法的基本原理和实用的重构公式。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。