查询词典 X-ray diffraction

We mainly refered to the one of those improved algorithms of Gerchberg-Saxton.With the computer simulation and drawing program, the simulated diffraction patterns were gotten in this paper, the results agreed with the anticipated diffraction patterns; in the paper we also design the computer optical elements that can shape the laser beam into a double circle shape,a lamp shape and so on.

同时，本文还用标量理论设计了把高斯光束整形为双圆斑形光束的计算机光学元件，文中主要是参考改进的GS(Gerchberg-Saxton)算法；通过计算机模拟，得到了计算机光学元件表面的相位浮雕图。

The results indicated that the distribution of the polymer and liquid crystal in the grating was periodic on the two-dimensional space. The diffraction pattern was regulated for space lattice and the diffraction efficiency was electrically switchable.

实验结果表明，光栅中的聚合物和液晶在二维空间上呈周期性分布，其衍射图样为空间点阵且衍射效率可以利用电场进行调节。

Based on the theory of fractional Fourier transform and one of its very important parameter, fractional order, the relationship between FRT and Fresnel diffraction are deduced and analyzed. The fractional Fourier transform hologram reconstructed with the Lohmann Ⅰ FRT system is presented and its computer simulation and digital reconstruction are realized. It is shown that FRT is an ideal tool to describe Fresnel diffraction,and the FRTH can record information on the object and the system at the same time,which extends the application areas of FRT and holography.

基于分数傅里叶变换理论并以分数阶这一重要参量为纽带，推导和分析了分数傅里叶变换与菲涅耳衍射之间的关系；提出了基于罗曼I型分数傅里叶变换系统的分数傅里叶变换全息图，并实现了其计算机生成及数字重现；研究表明，分数傅里叶变换是描述菲涅耳衍射的理想工具，分数傅里叶变换全息图可以同时记录物体和系统的信息，开拓了分数傅里叶变换和全息术的应用领域。

The resolution index of electron diffraction in TEM is analyzed. The exactly experimental method is given for demarcating electron diffraction camera length by Gold-monocrystal in TEM.

同时对TEM中的电子衍射分辨率指数进行了分析和讨论，并给出了实际应用金单晶标样精确标定TEM电子衍射相机长度的实验方法。

The ideal quantum gases obey Bose-Einstein or Fermi-Dirac statistics and the flux can be derived from the known distribution function. In this sense, we develop the kinetic schemes that suitable for ideal quantum gas and investigate the influence of the quantum effect. In this thesis we discuss shock tube problems and shock diffraction by wedges and shock diffraction by cylinders for the ideal quantum gases.

理想量子气体之速度分布依循Bose-Einstein或Fermi-Dirac分布，在已知气体分布函数的情况下，对分布函数取矩可得宏观量及其通量，本文即利用此概念发展适用於理想量子气体之气体运动算则，并探讨量子效应造成之影响，本文探讨理想量子气体之震波管、楔形体和圆柱震波绕射问题。

The original technology is based on the far-field optical but all of them are restricted by Rayleigh diffraction limit.In order to break optical diffraction limit restrictions, people improve recording density in three ways:(1) shorten wavelength of light,(2)increase numerical aperture of the lens N.A.

不过上述储存方式所采用的记录技术皆是在远场光学的领域内，在远场光学的绕射极限下，要持续提升记录密度的方法有三种；(1)缩小光源波长(2)提高透镜的数值孔径

During the testing many kinds of advanced instrument were implied in study of the fiber's inner structure, the infrared absorption spectrum, x-ray diffraction curve, etc.

同时对纤维主要的物理机械性能与化学性能进行了系统的实验分析，以期对该纤维的形态特征、服用性能有较全面的掌握。

In this paper, the influences of acetanilide content on the microstructure and macro properties of polyvinyl chloride were studied by means of differential scanning calorimetry, wide angle X-ray diffraction and scanning electron microscope.

利用差示扫瞄量热法、广角X-射线衍射和扫瞄电镜方法研究了乙酰苯胺质量分数对聚氯乙烯的结晶度、微观形态和宏观机械性能的影响。

In this paper,acetanilide,adipic acid and potassium hydrogen phthalate were chosen as additives to advance polyvinyl chloride to crystallize. The effects of compress mold,annealing temperature and time,additive property and loading on the crystallization,microscopicmorphology and mechanical properties of PVC were studied by means of wide angle X-ray diffraction,differential scanning calorimetry,fourier transform infrared spectrophotometer,scanning electron microscopeand tensile test.

本文利用乙酰苯胺、己二酸和邻苯二甲酸氢钾作为聚氯乙烯结晶改性的添加剂，通过广角X-射线衍射法、差示扫描量热法、傅立叶转换红外光谱、扫瞄电镜和万能电子实验机研究了热压、热处理温度和时间、添加剂结构和质量分数对PVC结晶、微观形态和宏观机械性能的影响。

The optical waveguides fabricated by using single benzoic acid and 60% ratio dilution were analyzed by double crystal X-ray diffraction.

用双晶X射线衍射法对单苯甲酸和混合摩尔比为60%制作的光波导进行X射线衍射。

When this condition occurs, inbound replication with the source partner is stopped on the destination domain controller and event ID 2042 is logged in the Directory Services event log.

计算机密码学是研究计算机信息加密、解密及其变换的科学，是数学和计算机的交义学科，也是一门新兴的学科。

Instructions: click on the thumbnails to see a larger image, then use the left-right arrow keys to scroll through the slideshow.

使用说明：滑鼠点在小图上即可放大观赏。开启后键盘左右键可用来换照片。