光束

The second spanwill not fully recover from the initial negative deflection resulting in unwanted soffi t variations.In calculating camber strips to compensate for beam deflection, the entire dead load must be considered including the weight of the formsand the weight of the beam along with any residual camber for the structure.

第二跨度不会完全复原，从最初的负偏转造成不必要索菲笔variations.in计算轮圈狭长，以补偿束偏转，整死负荷，必须考虑包括重量的形式和重量的光束沿任何残余拱结构。

Several chemical reagents such as chlorine dioxide,hydrogen peroxide, chlorine,and ozone were used in the experiment.

该光源较其它光源光束集中，穿透力强，试验结果也最好。

The numerical results indicate that the collimating performances of two lens changed little as the increasing of the refractive index and this made it possible to choose the material of the lens in more field.Theoretically,the radiation angle of laser diode beams in the quick axis can be compressed under 0.1 mrad.

结果表明：这两种柱透镜的准直效率随折射率的变化不大，这在一定程度上提高了透镜材料选择的灵活性；并且理论上，共轴双半椭圆柱透镜可以将半导体激光光束快轴方向的发散角压缩到0.1 mrad量级。

It practicality is a whole, Common single light beam laser chief by semiconductor laser, Half penetrated prisms/ Collimating lens, Naked quick detector sum promote move utensil wait for spare part compose.

它实际是一个整体，普通单光束激光头主要由半导体激光器、半透棱镜/准直透镜、光敏检测器和促动器等零部件构成。

The effect of detuning frequency and coupling coefficient to the phase-locking course was analyzed.

建立了该过程的数学模型，并对它的时间特性和输出光束的模式进行了理论和数值分析，讨论了运行频率差和耦合系数对锁相过程的影响。

The modulation of cross section is obviously,the intensity of it is smaller as the circular aperture is bigger and the intensity is bigger as the circular aperture is smaller.

平顶高斯光束经过圆孔衍射，孔径大时光强在横截面调制越厉害，但是强度小；孔径小时光强在横截面调制相对小，但是光强度相对大。

In order to study the generation and propagation characteristics of laser-generated Lamb wave in a solid plate, this paper presents the fiber-coupled optical deflection method to detect and to further discuss the detection principle in detail.

为研究板材中Lamb波的产生和传播特性，该文提出了采用光纤耦合反射式光束偏转技术进行探测的方法，讨论了这一测试方法对应的原理。

To suppress the noise which caused by the fuzzy character of XLPE sample, the size of the photodetector was determined based on the analysis of the light intensity distribution in the spatial frequency plane when the laser beam passing through the sample was collected by lens. A series of detectors were designed to eliminate the time response decreasing effect caused by the increasing of the detector size. The developed laser system could resolve defects of 40 um diameter in XLPE tape with the 120um diameter and 400Hz scanning laser beam. after above results was used.

为了消除由于XLPE材料光弥散效应引起的信号噪声对信号幅度测量的影响和提高测试速度，研制了阵列组合式光电探测器，理论分析和实验验证都证明了该探测器有较好的频响特性和较低的噪声水平，应用这两项成果组成的信号系统及微机数据采集电路可在400Hz扫描频率下，扫描宽度所限制的120μm光束直径下获得40μm的测量分辨率。

The distance between the phase template and the fiber so as to obtain the sample rate at two ends of fiber approach zero; light beam is scanned via sample template, diaphragm or shutter in uniform speed and projected to fiber to expose and form periodical sample structure.

调整相位模板和光纤间的距离，使光栅两端的取样率接近于零；再使光束匀速扫过取样模板或光阑、快门而入射到光纤上曝光形成光栅的周期性取样结构。

Single beam Laser speckle interferometry has been used to measure the deformation of internal combustion engine connecting rod in this paper.

本文用单光束激光散斑干涉法测量了内燃机连杆的变形。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。