查询词典 Fresnel diffraction

X-rays are used because they have the same wavelength as the atomic separatio so the crystal acts as a molecular diffraction grating to diffract a beam of X-rays, producing a diffraction pattern that can be captured and analyzed.

之所以使用X射线是因为其波长和原子裂解时的波长一样，所以晶体作为分子衍射光栅衍射X射线，产生一种可以获取并分析的衍射图形。

KGy dose of γ-irradiation decreased content of vitamin B1 significantly and did not had a significant effect on the content of vitamin E, protein, fat, amino acid and unsaturate fatty acid. The results of x-ray diffract grams revealed that the relatively diffraction intensity tended to decrease and the diffraction angle (2θ) tended to increase with the increase of irradiation dose.

X-射线衍射图谱分析表明，1～5kGy 剂量辐照处理可明显降低水饺皮的相对衍射强度，3kGy 辐照水饺的相对衍射强度最低；背景线强度最大值的角度位置(2θ)有随辐照量增加而增加的趋势，辐照对水饺皮淀粉老化有一定的抑制作用。

The effects of the relation on recording geometry with effective electrooptical coefficient and space charge field, wavelength of diffraction beam and diffraction angle on exposure sequence are taken into account, and the perfect exposure sequence is discussed based on recurrence method.

考虑有效电光系数和空间电荷场随写入光路几何组态的变化关系，以及各信道衍射光波长、衍射角等因素对曝光时序的影响，利用递推法推导出更为精确的曝光时序。

In the resin carbon materials treated at 620 ℃ the (100) crystal plane diffraction peek appeared evidently, at the same time the (110) and (006) crystal plane diffraction peeks also appeared. It means that the furfuralcohol resin is a type of facility graphitisable material.

还原性气氛中，经620 ℃炭化处理的样品出现了明显尖锐的(100)晶面特征衍射峰，同时还发现了(110)和(006)晶面特征衍射峰，表明糠醇树脂是一种较易石墨化的树脂材料。

The patterns of Reflection high energy electron diffraction from the epitaxial growth of Si-Ge crystal are interpreted basing on the kinetical diffraction theory of crystal.

在晶体衍射理论基础上，利用运动学理论解释了反射式高能电子衍射（reflection high energy electron diffraction， RHEED）在Si-Ge晶体外延生长过程中不同阶段出现的花样。

Intensity correlated imaging,which can realize the lensless Fourier-transform,the diffraction tomography and the two-step phase-retrieval algorithm are combined together to realize intensity correlated three dimensional diffraction tomography by using 650 nm pseudo-thermal light.

利用强度关联成像技术可实现无透镜傅里叶变换的特点，并结合衍射层析技术和二步相位恢复算法，使用波长为650 nm的赝热光实现了强度关联三维衍射层析。

By means of measurements of mechanical and electrical properties, metallographical and transmission electron microscope observation, X-ray diffraction and selected diffraction analysis, scanning electron microscope and energy spectrum, the phase transformation process of Cu-15Ni-8Sn alloy and the relation between its microstructure and properties were studied.

本文利用力学与电学性能测试，金相与透射电镜观祭，X-射线衍射与选区电子衍射分析，扫描电镜和能谱分析等方法对Cu-15Ni-8Sn合金的相变过程以及合金的组织结构与性能之间的关系进行了研究。

The formation of pure NiFe〓O〓 was confirmed by powder X-ray diffraction and electron diffraction.

粉末X-射线衍射和电子衍射确证了NiFe〓O〓纯相的形成。

According to mixture of colors theory,the white diffraction can be regarded as noncoherent superposition of the three primary colors diffraction.

根据配色原理，将白光衍射分解为三基色衍射场的非相干叠加，用Matlab模拟白光圆孔和单缝衍射场的分布图，给出程序代码，结果形象直观。

The research work is mainly focused on the phase mask method, the characteristics of near-field diffraction of the phase mask are analyzed with scalar diffraction theory, and the properties of grating formation are studied specifically when the writting light beam incidents normally and slantly, respectively, with some important conclusions derived.

我们首先采用按理想波导模展开的方法建立了FBG中的模式耦合方程，并用模式耦合理论研究了FBG中的模式耦合现象，导出了FBG的反射光谱和透射光谱的理论表达式，采用数值模拟计算的方法研究了FBG的结构参数对其反射光谱特性的影响，得出了若干重要结论。

Social security was made available from the cradle to the grave in Britain.

在英国，一个人从躺在摇篮里到进入坟墓，一生的社会福利都很完善。

John stand and the rest of you sit down.

约翰站着，其余的人都坐下。