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We study the relationship between microstructure and luminescence efficiency for GaN heteroepitaxial films by cathodoluminescence,transmission electron microscopy,and X-ray diffraction.

用阴极射线致发光法、透射电子显微镜和X射线衍射法研究了异质外延GaN材料的发光性质与结构特性的关系。

The result from X-ray diffraction showed cellular decomposition dominated the initial aging of Zn-Al based alloy prepared by rapid solidification with single roller.

通过100℃等温时效XRD分析可知，单辊快淬锌铝合金早期时效过程中胞状分解反应为主导。

The light intensity distribution was characterized by Fraunhofer diffraction when the projection of light source located in the symmetry center of rectangular aperture and the size of aperture is small enough .

根据菲涅尔-基尔霍夫衍射积分得出矩孔菲涅尔衍射的光强分布表达式，对该表达式作了数值计算，分析了矩孔尺寸对衍射光强分布的重要影响。

It is found by X-ray diffraction that the solution of Sm2O3 and Gd2O3 in ceria for the samples sintered in the range of 1 400─1 550 ℃ is better, but for the sample sintered at 1600 ℃, a new phase is formed with the reduction of lattice constants.

X射线衍射分析发现：对1 4001 550 ℃烧结的样品，Sm2O3和Gd2O3固溶较好﹔但对1 600 ℃烧结的样品，有新相生成，同时晶格常数减小。

Products on the sulphurized surfaces of cerussite and smithsonite have been studied by means of infrared spectra,Auger electronic spectra,X-ray pho- toelectron spectroscopy and X-ray diffraction techniques etc.

本研究采用红外光谱、俄歇电子能谱、X 射线光电子能谱、X 射线衍射等手段测定了白铅矿、菱锌矿硫化表面产物。

The RE doped TiO2 was prepared by sol-gel method, the structure and shape were characterized by X-ray diffraction and FE-SEM. The photocatalytic activities were evaluated by degradation of chloramine phosphorus.

采用溶胶－凝胶法制备稀土掺杂纳米TiO2光催化剂，利用X射线衍射仪和FE-SEM等对样品的结构和形貌进行表征。

Application on circular cylinder particle size distribution based on anomalous diffraction approximation.

反常衍射近似在测量圆柱形粒子粒径分布中的应用。

Another numerical model is presented to solve the problem of regular and irregular waves diffraction around a 3D vertical circular cylinder.

以直立圆柱桩的单色、双色规则波和不规则波绕射问题为算例，具体的介绍了透射理论在水波绕射问题中的应用。

The phase of optical wave can be recovered by the intensity transport equation under the paraxial approximation For the optical system with diffraction limit, it is difficult to get the boundary radical slope of phase and sample in the circular domain boundary when using the intensity transport equation to recover the phase, consequently, we reviewed an algorithm mentioned in the reference ［4］, namely, the equation, computation domain and boundary condition are changed, then the phase is reconstructed by the multigrid method and corrected at last Moreover, the experiment system is set to testify the algorithm, and the recovered phase from the intensity data detected by CCD is compared with the result from phase retrieval algorithm, it is found that the phase reconstruction error can reach 017 λ in the case of non-uniform intensity distribution, as a result, the method is suitable for the phase recovery with low wavefront sensing accuracy.

在傍轴近似条件下，可以利用光强传播方程对畸变波前进行相位恢复。对于衍射受限的光学系统，很难获得相位的边界径向斜率值作为边界条件，此外，要获得精确的圆域边界采样值也并非易事。为了克服上述困难，进一步研究了相位恢复改进方法，即改变了方程的表示形式、计算区域和边界条件，并用多重网格法进行求解获得重构相位，最后再将其修正。为了验证算法的精确性，搭建了实验系统对算法进行实验验证，将由CCD探测的光强分布进行计算得到的相位分布与相位恢复算法的结果进行比较，证明在光强分布非均匀的情况下，该方法恢复的相位均方根误差能够达到017 λ，可以适用于波前传感精度要求不是很高的相位恢复。标签自适应光学相位恢复相位修正光强传播方程 adaptive optics phase retrieval phase correction intensity transport equation

First, if the nucleotide consists of a unit having circular symmetry about an axis parallel to the helix axis, the whole diffraction pattern is modified by the form factor of the nucleotide.

首先，如果核苷酸组成一个单位有一个圆形对称轴平行的螺旋轴，整个衍射图样是修改了外形的核苷酸。

The teacher likes the honeymouthed little girl very much.

老师很喜欢这个嘴甜的小姑娘。

Mr. Notker Bien's interests are traveling, spending quality time with the family and long-distance-running.

诺特卡·柏恩先生热爱旅游，长跑，以及和家人一起共度美好时光。