小角

X-ray diffraction is one of the most common and efficient ways to measure a superlattice structure. This dissertation displays the detail results for characterization of Ge〓Si〓/Si superlattices by x-ray diffraction (including x-ray small angle diffraction and double crystal diffraction). It was found, when the growth temperature is lower, the intensities of xray small angle diffraction peaks are modulated by a periodical function, which indicates that both sets of interfaces of the superlattice is highly flat; when the growth temperature is higher, the diffraction peak intensities are simply decay with the increase of diffraction vector, which indicates that one set of interfaces is highly flat but another is not; when the growth temperature is very high, the diffraction peaks are reduced more rapidly, which indicates that both sets of interfaces are not ideal.

本文详细介绍了用X-射线衍射（包括X-射线小角衍射和双晶衍射）方法对Ge〓Si〓/Si超晶格结构特性测试的结果，尤其是发现，当Ge〓Si〓/Si超晶格的生长温度较低时，X-射线小角衍射谱峰的强度随着衍射波矢的增加而周期性调制，表明超晶格的两套界面都十分平整；当生长温度较高时，Ge〓Si〓Si超晶格的X-射线小角衍射谱峰的强度随着衍射波矢呈简单的衰减变化，对应于超晶格内有一套界面不平整的情况；当生长温度进一步提高时，X-射线小角衍射峰明显减少，表明超晶格内两套界面都不理想。

For the image quality, the astigmatic and lateral color of the key aberrations of eyepiece are 0.58 mm and 18 μm, and the distortion is only 3.3%.

对于目镜中需要重点校正的像散和垂轴色差的最大值分别为0.58 mm和18 μm，而最大畸变也仅为3.3％；角分辨率为0.44 mrad，小于人眼的最小角分辨率。

In this paper Using the single linear array CCD and the principle of autocollimation measuring angle, a novel method for measuring two-dimensional small angle is presented in the paper, in which the single linear array CCD combines with N pattern reticule to trace and measure simultaneously two-dimensional small angle with high measuring frequency.

本文采用单一线阵CCD原理及自准测角、一种测量二维小角度介绍文章其中单一线阵CCD模式结合镜头氮同步跟踪测量二维小角测量频率高。

Human trophy hunting for bighorn rams has caused the population to evolve into one of smaller-horn rams.

人类对大角绵羊战利性狩猎使这种大角绵羊进化一种小角羊。

It is found that there exists an obvious prepeak in the low-Q domain (Q=15.7 nm^-^1) of the structure factor. In the X-diffraction pattern, the liquid diffraction curve is corresponding with the solid diffraction curve. There exist the prepeaks for them in the low-Q domain, which shows that there is the comparability in the microstructure between them.

采用紧束缚原子间作用势，利用分子动力学模拟的方法研究了Al5Fe2合金熔体的微观结构，发现在结构因子的小角部分(Q=15.7nm^-^1)出现了一个明显的预峰，并得到X射线衍射实验的进一步印证，在实验测得的合金衍射图样中，液态衍射曲线与固态衍射曲线间存在着很好的对应关系，它们在小角部分都存在峰位，这表明Al5Fe2合金熔体与其固态在结构上存在着很大的相似性。

Meanwhile, the optical path difference and the degree of modulation of this kind of interferometer are calculated. It′s easy to be found that, in order to get the better diagram of the degree of modulation, both the inclination of the two image planes and the image aperture angle must be small angles, and both the lateral and longitudinal offsets must be smaller.

可以看出：要得到较好的调制图形，必须满足两像面夹角和像方孔径角都是小角的条件，且两个像点之间的横向距离和纵向距离越小越好。

The results show:(1) the probability at small scattering angle is larger than that at big scattering angle. With the increase of collision energy, the scattering probability and the tail effect slow down.

结果表明：(1)小角散射的概率大于大角散射的概率；碰撞能量越高，散射概率越小，尾部效应越弱。

A single dynamic temperature ramp test is adequate in determining both the binodal and spinodal phase separation temperatures.(3) The critical composition and temperature of PMMA/SAN is 56/44 and 184℃, respectively.

常规的研究方法，如差示扫描量热法、动态力学分析法、荧光光谱法、傅立叶转换红外光谱法、小角X射线散射、小角中子散射和小角激光散射等，都存在不可避免的缺陷。

A new dinosaur species was a plant-eater with yard-long horns over its eyebrows, suggesting an evolutionary middle step between older dinosaurs with even larger horns and the small-horned creatures that followed, experts said.

这是一种头上有着多只近1米长的角且以植物为食的恐龙，它其实是恐龙从头上长着很大的角进化到&小角缠头&这一过程内的中间产物。

A new dinosaur species was a plant-eater with yard-long hornsoverits eyebrows, suggesting an evolutionary middle step betweenolderdinosaurs with even larger horns and the small-hornedcreatures thatfollowed, experts said.

这是一种头上有着多只近1米长的角且以植物为食的恐龙，它其实是恐龙从头上长着很大的角进化到&小角缠头&这一过程内的中间产物。

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。