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Based on the Fresnel diffraction integral and the complex Gaussian expansion for the hard-edge aperture function, a simple and analytical expression for calculating the diffraction field distribution of an apertured lens is presented.

基于菲涅尔衍射积分和将硬边孔径函数展开成有限项复高斯级数方法推导出了计算透镜衍射光强分布的解析表达式。

Staring from Fresnel diffraction integral,we deduced the optical intensity distribution in the Fresnel zone of the diffraction field of the annular-aperture lens axicon.

从菲涅耳衍射积分公式出发，推导多色高斯光束被球差透镜衍射后光强分布的解析公式，进行数值模拟和物理分析。

Diffraction peak of X-ray diffraction at 26°indicate that the sample is characterized as graphitization.

XRD图谱中，26°处的衍射峰表明该试样具有较高的石墨化特征。

Based on the principle of the double hemicycle diffraction, by giving each of them different discrepancy, the phase can be detected with the diffraction patterns.

基於双半圆孔衍射的基本原理，通过对其两部分分别施加不同的相位，利用衍射图样，进行了相位信息提取研究。

From the perspective of matter wave in quantum mechanics, this paper, by describing the wave function of microcosmic particle and using probability wave, derives the distributive regularity of light intensity of the single slit diffraction and circular aperture diffraction.

光具有波粒二象性，从量子力学的物质波出发，利用描述微观粒子的波函数，采用几率波的方法，导出光的单缝衍射和圆孔衍射的光强分布规律，所得结果与波动光学中用惠更新－菲涅耳原理得到的结果一致。

The camera length of electron diffraction in transmisson electron microscopy is one of the main technical parameters in designing electron microscope and the electron diffraction analysis to microcrystal sample.

透射式电子显微镜(Transm isson E lectron M icroscopy，TEM)中的电子衍射相机长度，是电子显微镜设计和对微晶体样品进行电子衍射分析的主要技术参数之一。

It is a measurement method following the diffraction and interference theory of the point light source. The phase message of interference pattern was obtained by the Fourier transform pattern analysis method. And the xyz-coordinates of the two point diffraction sources were calculated by the modified Newton method based on the Broyden-Fletcher-Goldfarb-Shanno algorithm.

基于傅里叶变换的点衍射干涉测量术是一种建立在点光源衍射干涉理论基础上的测量方法，它采用傅里叶条纹分析方法来求解干涉条纹的相位分布，运用基于BFGS的拟牛顿算法进行三坐标的迭代计算，确定点光源的三维空间坐标。

We can say that neutron scattering is an important and necessary complement for X-ray diffraction and electronic diffraction.

中子散射可以说是对X射线衍射和电子衍射的一个重要的和不可缺少的补充。

The experimental results indicate that when introducing XT-β nucleator into PP, the size of spherulite of the specimen obviously reduces and there appear typical characteristic diffraction peaks of β crystal form in the wide-angle X-ray diffraction pattern....

结果表明：在PP中引入XT-β晶型成核剂后，试样的球晶尺寸明显减小，广角X射线衍射谱图出现了典型的β晶型特征衍射峰；试样的结晶速率、结晶温度明显提高，差示扫描量热法谱图出现α晶型、β晶型2个熔融峰，β晶型含量达到总结晶量的50%～80%；XT-β晶型成核剂可使体系保持较好的力学性能，PP负荷下热变形温度提高15～40℃。

The EM scattering and diffraction field of each element is computed by using physical optics and physical diffraction theory.

利用物理光学法和物理绕射理论计算目标每一单元的散射场和绕射场。

As of Tuesday, Google's results were still censored in China.

截至周二，谷歌的搜索结果仍受中国审查。

In order to make the positive action increase and negative one decrease, the sub-forces of the social factors must be adjusted to form a centripetal force.

在这一过程中，人的主体性发挥是社会有机体健康发展的灵魂。