查询词典 Fresnel diffraction

Iron-based composite coatings were deposited on mild steel substrate by arc spraying cored wire with WC-CoNi ceramic powders. The abrasion wear properties were evaluated using a examined MLS-225 wet sand/rubber wheel tester. The microstructure, phase compositions and worn surface of the coatings were examined by means of optical, scanning electron microscopy and X-ray diffraction.

采用电弧喷涂含WC-CoNi金属陶瓷粉末的粉芯丝材，在低碳钢基体上制备铁基复合涂层，采用MLS-225型湿砂橡胶轮磨损试验机评价铁基复合涂层的耐磨粒磨损性能，利用光学显微镜、扫描电子显微镜和X射线衍射仪对涂层的显微组织结构、磨损表面及其相组成进行分析。

Transmission electron microscope, selected area electron diffraction and tilting experiment along the crystal a-axis are applied and two completely different phase compositions and structure are found in the light and dark regions of the ring-banded spherulites.

采用透射电子显微镜、选区衍射和倾斜实验技术确定了PTT溶液浇铸薄膜在较低温度下形成的环带球晶的相结构和组成。

In wet state, the BC shows no X-ray diffraction and NMR of cellulose Ⅰ.

在干态下，细菌纤维素有较高的结晶指数和较高的纤维素Ⅰ；而湿态下的细菌纤维素没有显示出纤维素Ⅰ晶型的X射线衍射特征峰和核磁共振图谱，结晶指数和晶粒尺寸都相对较小。

The cellulose Iα and crystallinity index of the bacterial cellulose in dried state are very high compared with the other native cellulose such as cotton and Valonia.In wet state,the BC shows no X-ray diffraction and NMR of cellulos...

在干态下，细菌纤维素有较高的结晶指数和较高的纤维素Iα；而湿态下的细菌纤维素没有显示出纤维素I晶型的X射线衍射特征峰和核磁共振图谱，结晶指数和晶粒尺寸都相对较小。

Because of diffraction and other physical phenomena during mask making, optical lithography and etching under Sub-Wavelength Lithography, the mask patterns are not the same as printed shapes on silicon wafer.

在亚波长光刻下，由于掩模制造、光刻和蚀刻过程中光的衍射及其它物理现象，导致掩模图形和硅片表面实际印刷图形之间不再一致。

The invention adopts the technical proposal that the nucleation and process of growth of the molecular sieve are controlled properly by adding crystal seeds containing zeolite beta precursors in the synthetic process of the intergrowth molecular sieve for producing the intergrowth molecular sieve, wherein the proportion of intergrowth phases is adjustable, the synthesized intergrowth molecular sieve adopts the compositions including the following mole relation: nSiO2:Al2O3, where n is between 4 and 400 in the formula, and the method is characterized in that the intergrowth molecular sieve has more than two phases and an XRD diffraction pattern thereof has the d-space maximum value at the lengths of 13.58 -0.1, 11.50 -0.04, 11.21 -0.1, 10.04 -0.1, 9.47 -0.1, 9.09 -0.1, 7.56 -0.1, 6.6 -0.1, 4.5 -0.1, 4.16 -0.05, 3.98 -0.05, 3.86 -0.05, 3.76 -0.04, 3.53 -0.04 and 3.38 -0.02 angstroms, thereby solving the problems properly.

本发明通过采用在共生分子筛合成过程中，加入含β沸石前驱体的晶种，控制好分子筛的成核和生长过程，制备出了一种共生分子筛，其中共生物相比例可调，合成的共生分子筛采用包括以下摩尔关系的组成：nSiO 2 ∶Al 2 O 3 ，式中n＝4～400，其特征在于所述共生分子筛具有两种以上的物相，其XRD衍射图谱在13.58±0.1，11.50±0.04，11.21±0.1，10.04±0.1，9.47±0.1，9.09±0.1，7.56±0.1，6.6±0.1，4.5±0.1，4.16±0.05，3.98±0.05，3.86±0.05，3.76±0.04，3.53±0.04，3.38±0.02埃处有d-间距最大值的技术方案，较好地解决了上述问题。

The invention adopts the technical proposal that the nucleation and process of growth of the molecular sieve are controlled properly by adding crystal seeds containing MCM-22 precursors in the synthetic process of the three-phase intergrowth molecular sieve for producing the three-phase intergrowth molecular sieve, wherein the proportion of intergrowth phases is adjustable, and the synthesized three-phase intergrowth molecular sieve includes compositions having the following mole relation: nSiO2:Al2O3, where n is between 4 and 400 in the formula, wherein the three-phase intergrowth molecular sieve has more than two phases and an XRD diffraction pattern thereof has the d-space maximum value at the lengths of 13.58+-0.1, 12.35+-0.1, 11.21+-0.1, 10.04+-0.1, 9.09+-0.1, 8.83+-0.1, 6.6+-0.1, 6.17+-0.1, 4.5+-0.1, 4.09+-0.05, 3.98+-0.05, 3.86+-0.05, 3.76+-0.04, 3.64+-0.04, 3.47+-0.05, 3.38+-0.02, 3.29+-0.04, 3.19+-0.05 and 2.88+-0.1 angstroms, thereby solving the problems properly.

本发明通过采用在三相共生分子筛合成过程中，加入含MCM-22前驱体的晶种，控制好分子筛的成核和生长过程，制备出了一种三相共生分子筛，其中共生物相比例可调，合成的三相共生分子筛包括以下摩尔关系的组成：nSiO2∶Al2O3，式中n＝4～400，其中所述三相共生分子筛具有两种以上的物相，其XRD衍射图谱在13.58±0.1，12.35±0.1，11.21±0.1，10.04±0.1，9.09±0.1，8.83±0.1，6.6±0.1，6.17±0.1，4.5±0.1，4.09±0.05，3.98±0.05，3.86±0.05，3.76±0.04，3.64±0.04，3.47±0.05，3.38±0.02，3.29±0.04，3.19±0.05，2.88±0.1埃处有d-间距最大值的技术方案，较好地解决了上述问题。

X-ray diffraction, transmission electron microscope and vibrating simple magnetometer were used to characterize the crystallization, microstructure and the magnetic properties.

利用XRD、TEM及VSM等对样品的粒径，分散性，物相组成及磁性能进行表征并讨论。

According to the simulation results, BIQ4 method resulted in the highest diffraction efficiency and the signal-to-noise ratio.

根据模拟的结果，BIQ4可得到最高的绕射效率及讯杂比。

In this paper, based on the scalar theory, PSF is obtained theoretically under the condition of considering diffraction effects.

本文以标量衍射理论为基础，从理论上推导出了衍射效应条件下编码孔径中圆环的点扩散函数，并将它用于制作光学系统的滤波器。

Article 144 The Government of the Hong Kong Special Administrative Region shall maintain the policy previously practised in Hong Kong in respect of subventions for non-governmental organizations in fields such as education, medicine and health, culture, art, recreation, sports, social welfare and social

第一百四十四条香港特别行政区政府保持原在香港实行的对教育、医疗卫生、文化、艺术、康乐、体育、社会福利、社会工作等方面的民间团体机构的资助政策。原在香港各资助机构任职的人员均可根据原有制度继续受聘。

Small wonder, then, that the Chinese spend more in the shop than any other group of foreign visitors do .

这样的小惊喜，使中国顾客比任何国家的人消费得更多。