查询词典 Fresnel diffraction

For single vug,when the lateral scale of vug is smaller than Fresnel radius,and the vertical scale is smaller than tuning thickness,the reflection amplitude of vug is proportional to its scale. For carbonate reservoir with random arranged vug,seismic wave amplitude is proportional to vug density.Key words random medium;forward modeling;carbonate;vug

对于单个的溶洞而言，当溶洞横向尺度小于菲涅尔带半径，纵向尺度小于调谐厚度时，溶洞反射振幅与溶洞尺度成正比例关系；对于随机分布孔洞的碳酸盐岩储层而言，地震波能量与孔洞密度成正比例关系。

Based on the extended Huygens-Fresnel principle and the quadratic approximation of phase structure function, we have derived the analyticl expression of the spatial degree of coherence for partially coherent flattened beams propagating through the slant turbulent atmosphere with the help of tensor integral, then analyzed the effects of different zenith angle, propagation distance, coherence of source and outer scale of turbulence on the spatial degree of coherence on the receiver.

基于广义惠更斯-菲涅耳原理和相位结构函数的平方近似，运用张量积分的方法导出了部分相干平顶光束通过斜程湍流大气传输后接收面光束空间相干度的解析表达式，分析了不同天顶角、传输距离、光源相干性以及湍流外尺度对接收面光束空间相干度的影响。

It was not until Young worked with French physicists Augustin Fresnel and Francois Arago that his wave theory began to be accepted in Europe.

直到他和法国科学家奥古斯丁。菲涅耳和弗朗西斯。阿拉戈合作时，杨的光波动理论才开始在欧洲被接受。

The theory of stack technique of variable binning comes from definition of first Fresnel Zone .

变面元叠加技术的理论基础来源于第一菲涅耳带定义，据此，可以随深度增加进行扩大面元处理，以增加同一CMP道集内的叠加道数，达到增强有效波能量且消除各类干扰波的目的。

In order to solve the problems in system of four aspheric mirrors, Fresnel mrirror and the catadioptric projection lens, the method that free form surfaces were used to design ultra-thin imageing system was put forward at last.

为了解决上述四片非球面系统、Fresnel反射镜和折反系统结合投影镜头存在的问题，本文最后提出了采用自由曲面设计超薄成像系统的方法。

In light of Fresnel formula the author analyses the features of linearly polarized light reflecting on the surface of apparent medium,discusses the relationship between the circumrotation in the plane of vibration,changes of the light intensity and the angle of incidence,the orientation of the plane of vibration,and addresses the relationship between the swing,phase and the incident angle and medium.

自然光在分界面上反射的一些特点在许多光学教材[1，2]上都进行了介绍，本文根据菲涅耳公式和菲涅耳定律，分析线偏振光在透明介质分界面上反射时的一些特点，讨论反射光的振动面所发生的旋转及光强度的变化与入射角、振动面的方位之间的关系；进一步讨论在全反射情况下，反射光的振

For concrete construction design, practical calculation formule were dedused theoretically. Light shielding effects of Fresnel reflector and heliostate were examined and the temperature of working fluid in receiver pipe was calculated.

根据具体的结构设计和理论推导，得到了为设计这类聚光集热系统实际可用的计算公式，如平面镜和菲涅耳反射镜的遮荫计算，集热管中工质温度的计算等。

Ten patients with homonymous hemianopia received a 30-diopter fresnel plastic paste-on prism on their glasses. The prism was pasted base out toward the side of their hemianopia and on one lens only. A small 1 to 2 mm portion was cut out of the center to prevent diplopia.

利用一30稜镜度之Fresnel稜镜贴在同侧性半盲病人的眼镜上，稜镜的基底部置於半盲侧，只须贴一眼，譬如右侧半盲病人贴右眼的颞半侧，中心部份要剪掉1至2毫米，以避免复视。

The main contents are as follows:(1) Based on Fresnel transformation and its fast algorithm by FFT, the principle of numerical reconstruction of digital lensless Fourier transform hologram and the spatial resolution, as well as the lateral resolution of the reconstructed images plane are elaborated.

其主要内容包括：(1)从处理衍射问题的菲涅耳变换法出发，根据菲涅耳衍射积分的快速数值解法，讨论了数字无透镜傅里叶变换全息图数值再现的相关过程和理论，以及再现像平面的空间分辨率和横向分辨率问题。

It shows that the lensless Fourier transform digital hologram can be reconstructed at any distance by Fresnel transform algorithm. For convolution algorithm,the whole reconstructed image with high resolution can be acquired in an optimal reconstruction range or a small area around it.

结果表明：利用菲涅耳变换算法对离轴无透镜傅里叶变换数字全息进行重建时，无重建距离的限制；采用卷积重建法只能在最佳再现距离附近一个非常小的范围内才能获得高分辨率再现像；而采用角谱重建法在略小于最佳再现距离及大于最佳再现距离较大范围内重建，均能获得高分辨率的再现像。

Foods high in this vitamin include oily fish such as salmon, tuna and, and fish liver oils.

维生素D含量高的食物包括诸如大麻哈鱼、金枪鱼和鲭鱼之类的油鱼以及鱼肝油。

We need you to cosign our public letter demanding that press intimidation cease immediately, and that all charges be dropped.

我们需要您cosign我们的公共信，要求记者立即停止恐吓，并要求所有收费下降。