查询词典 crystal diffraction

Two kinds of stable decagonal quasicrystals and 16 approximants have been found in Al-Cr- alloys by means of selected-area electron diffraction, high resolution electron microscopy image and X-ray single crystalline diffraction.

用选区电子衍射和高分辨像等手段，确定了Al-Cr-合金系中的16个准晶近似相，其中的7个准晶近似相为新相，它们是：六方τ相，六方μ′相和正交ε相，以及周期为3.72nm的正交(2/1，2/1)，(1/1，3/2)，(2/1，3/2)相和α=2.29nm，c=3.71nm，β=108°的单斜相。

Microstrucfure of the powder samples achieved such as crystallographic structure, grain size, particle morphology, element analysis and thermal decomposition were characterized by means of X-ray diffraction, transmission electron microscopy, electron diffraction, energy dispersion X-ray spectroscopy and differential thermal analyzer etc.

结果表明，所制备的钠米镍粉、镍铜及镍铜硼复合粉呈颗粒均匀的球形或类球形，粒径在40nm～60nm之间。采用DTA方法对添加了纳米粉的高氯酸铵、AP／HTPB推进剂热分解情况进行表征。

From the x-ray diffraction analysis, the diffraction angle decreases with increasing an amount of carbon atoms.

在x-ray绕射方面我们发现，x光绕射角随著碳数增加而减少，配合对各个分子做分子长度运算，可以得到分子倾斜角。

The diffraction intensity change with to step number L , incidence wavelength λ,diffraction angle θ and outline angle φ 0 is analyzed.

分析计算了衍射光强随台阶数、入射波长、衍射角和轮廓角的变化关系。

According to the experimental product, the X-ray powder diffraction bread peak curve derived from it is amorphous, with no diffraction peak of copper in glycine template.

根据实验所得的产物其X-射线粉末衍射曲线呈馒头峰是非晶态，没有出现模板甘氨酸铜的衍射峰。

Diffraction stack: A weighted stack of all the elements of reflected energy along a diffraction curve which yields a migrated section (to the extent that the data were two-dimensional).

沿绕射曲线所有反射能量的加权叠加从而得到一个偏移剖面(如绕射叠加：果数据是二维的)。

Due to the numerical aperture of DVD pickup is large, and the characteristic size is small, the error of scalar diffraction theory is very large. The in-depth research work on vector diffraction of optical disc was carried out. The optical disk model was analyzed use the rigorous coupled wave theory, and some significative conclusion was obtained. These conclusions can use for guidance of scheme designing of optical pickup.

针对DVD读取头光学系统数值孔径大，光盘特征尺寸小，标量衍射理论误差大等缺点，采用矢量衍射理论对光盘的衍射进行了深入的研究，首次在光学读取头领域中将耦合波理论应用到光盘的衍射分析中，得到了一些有意义的结果，这些结果可以用来指导光学读取头方案的设计。

With the help of the diffraction theory grating,the influences on diffraction efficiency of MGSs were discussed.

利用光栅的衍射理论对衍射效率变化进行了分析。

At first the frequency spectrum of diffraction light is sampled so as to make holographic grating diffraction discrete in space frequency, namely, in the grating code is included discrete frequency spectrum, which satisfies requirements of human vision.

首先对衍射光的频谱进行采样，使全息光栅衍射的是空间频率不连续的离散光，即在光栅的编码中只包含离散光频谱，且满足人眼视觉要求。

Double slit diffraction is the double slit interference phenomenon modulated by single slit diffraction.

双缝衍射是指被单缝衍射调制的双缝干涉现象。

He tendered his resignation to the Prime Minister.

他向首相递了辞呈。不适合

International economy and trade,Nanking 210044

国际经济与贸易，南京 210044