查询词典 diffraction

Diffraction by helices It may be shownthat the intensity distribution in the diffraction pattern of a series of points equally spaced along a helix is given by the squares of Bessel functions.

衍射螺旋这可能是显示的强度分布的衍射图样的一系列点同样距离的沿螺旋给予的平方贝塞尔函数。

The paper studies the calculaton of wave force on large scale cylinder. Using the linear wave diffraction theory to compute wave force on the large scale cylinder, the paper presents a Nystrm method to solve the problem of the linear wave diffraction.

主要考虑大尺度墩柱上的波浪力的计算，应用线性水波绕射理论来计算作用在大尺度墩柱上的波浪力。

The bioactivity of titania coatings before and after modification were investigated by simulated body fluidtests in vitro.X-ray diffraction,Scanning electron microscope,Fourier transform infrared spectroscope and Energy diffraction spectroscope were used to investigate the microstr...

结果表明：氧化钛涂层和钛合金基体的结合强度较高，其值高达40MPa，涂层的耐模拟体液腐蚀性优于钛合金。酸和碱溶液表面改性后的氧化钛涂层经模拟体液浸泡可在其表面生成含有碳酸根的羟基磷灰石，显示良好的生物活性。

Diffraction peaks mainly appeared in 1°-2° on X-ray diffraction spectrum of mesoporous materials.

介孔x衍射图谱主要在1°~2°出现衍射峰，一些0.6°~0.9°的峰可能由仪器设置、样品制备不当所致。

In this study, the traditional angular spectrum method of diffraction simulation is improved. By introducing band-with limitation, a new method is put forward, which is suitable for diffraction simulation both in far and near field.

本文对传统的角谱法衍射计算做出改进，通过引入带宽限制给出一种新的衍射计算方法，能同时兼顾近场和远场的衍射分布计算。

The product was characterized by Fourier transform infrared spectroscopy, X-ray diffraction, and transmission electron microscopy. Silver crystals were monocrystalline with face-centered cubic structures, which was confirmed by electron diffraction and XRD.

利用透射电子显微镜、X射线衍射和傅里叶变换红外光谱对复合纳米微粒的形貌及其成分进行了表征。X射线衍射和电子衍射证明银纳米微粒具有良好的面心立方体单晶结构。

Pressure induced amorphous transition of LiB 3O 5 has been investigated by using in situ high pressure X ray powder diffraction and energy dispersive X ray diffraction with synchrotron radiation at the pressure up to 45 1GPa.

采用X射线粉末衍射和同步辐射能散X射线衍射技术，对LiB3O5晶体进行了压致非晶化相变的研究，压力达45.1GPa。

By transmission electron microscope, selected area electron diffraction, powder X-ray diffraction, differential scanning calorimeter as well as self-devised drainage, the effects of metals on grindability, material size, hydrogen storage capacity and hydriding-dehydriding properties are emphatically researched. Fe、Co、Ni were added in pretreatment process of anthracite and the effects of the added metals are researched, also, the action mechanism of metals is discussed on the basis of experimental results.

通过透射电镜、选区电子衍射，X射线衍射、差式扫描量热分析以及自行设计的排水装置等分析测试手段，着重研究了储氢材料中金属对其可磨性、粒度大小、储氢密度、吸放氢性能等的影响，在无烟煤的预处理过程中添加了Fe、Co、Ni三种金属，研究了所添加金属对材料储氢的影响，并在实验结果的基础上探讨了储氢材料中金属的作用机理。

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。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。