查询词典 on the beam

A projection slit is illuminated by a collimated laser beam.The projection slit is projected onto an object to be measured with grazing incidence through a lens.After being reflected by the object,the projection slit is imaged on a detection double slit through another lens.

准直激光束照明的投影狭缝由一个透镜以掠入射角度投影在被测物体上，狭缝投影经过被测物体表面的反射和另一个透镜的成像在探测双缝上形成投影狭缝像。

In the experiment , the grating is mounted and glued on one side of a cantilever beam made with a material having a relatively large elastic constant .

在实验中，光栅安装和胶合一方悬臂梁同一种材料具有较大的弹性常数。

Unit, the process of changing the direction of the electron beam and thus its position on a ''.

设备上，改变电子束的方向并且从而改变了它在''。

Considering that generation and maintain of small radius, high power beam is restricted by the compression ratio of electron gun, the effect of magnetic field on electron trajectories in transition region was analyzed.

分析了过渡区中电子注调节的基本原理，设计了一种渐变式的过渡区结构，其注腰半径为0.8mm，周期均匀磁场峰值为0.29T，周期为4.5mm，压缩比为22。

The contrast speckle superposed on intensity envelop is used as an essential parameter by which the smoothing performance of beam-smoothing techniques can be evaluated.

对不同偏振光控制板的理论分析和数值模拟结果表明结构最简单的二单元偏振控制板具有最佳的匀滑效果。

On summarizing the common methods of reinforcement and reconstruction,bring forward a series new methods of reinforcement and reconstruction -from extrados reinforcing Two-way Curved Arch Bridge,including mostly reinforcing vault and skewback critical sections,at the same time optimizing deck structure reinforcement method;only reinforcing skewbackreinforcement method;altering arched arch construction for beam-arched arch reinforcement method.and combining condition of health rating with reinforcement method,as for different quality grade to select different reinforcement method.

在总结常用加固改造方法的基础上，提出了系列新的加固改造方法—从拱背加固双曲拱桥，包括主要加强拱顶和拱脚两控制截面，同时优化桥面结构的加固方法；仅加强拱脚截面的加固方法；改拱式拱上建筑为梁拱式拱上建筑的加固方法。并把技术状况评定等级与加固方法结合起来，根据不同的质量等级选择不同的加固方法。

Based on Collins integral formula and the expansion of the hard aperture function into a finite sum of complex Gaussian functions,the approximate analytical expression of the diffraction field of Gaussian beam by a circular disc is derived,and its characteristics are analyzed by the numerical calculation and numerical simulation.

基于圆孔光阑函数展开为复高斯函数和的方法，用Colins积分公式，导出了高斯光束照射下圆盘衍射的光场近似解析表达式，经计算机数值计算，对高斯光束照射下圆盘衍射的衍射特性进行了详细的分析

Several parameters for the fire resistance on cross section of a reinforced concrete T-beam exposed to the ISO834 standard fire are analyzed,including the fire time and the ration of load.

结合国内外建筑结构火灾试验，引入开裂准测和非线性本构关系，提出了火灾下结构有限元分析思路，利用数值模拟程序分析了火灾高温下钢筋混凝土T梁截面的温度分布，研究了火灾时间、荷载比对ISO834标准火灾升温过程下钢筋混凝土T梁桥挠度的时变效应规律及开裂状况。

The diffraction distributions of Gaussian beam limited by the circular apertures with different sizes in scanning objectives focal plane were studied, and then the effective spot radius in focal plane was calculated using second moment and compared with the ideal one. The influence of apertures with different sizes on resolution was analyzed.

在不同孔径圆孔的限制下，对扫描物镜焦面上的衍射光场分布进行数值计算，并利用二阶矩统计的方法对焦面上的等效光斑半径进行数值计算，将其与不受限时的理想情况进行对比，分析孔径尺度对激光束扫描系统分辨率的影响。

At the same time,according to a practical structure,the article establish the model of a single gabled frame,and get the wind-induced displacement vibration coefficient of steel beam based on frequency method.

同时本文以某一实际工程为背景，建立单榀门式刚架模型，并对其进行了频域内的随机振动分析，计算出门式刚架钢梁位移风振系数。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。