查询词典 beams

A multiple-step beams model was established to analyze the static stiffness characteristics of the double parallel four-bar mechanism with right angle flexible hinges based on the symmetry of the structure. Formula for calculating the static stiffness was derived by applying singularity function. On the basis of this analysis, the factors influencing the stiffness performance of the double parallel four-bar mechanism were studied from its geometric parameters, and the theoretical model was verified by finite element method.

根据其结构的对称性建立了静刚度分析的阶梯梁模型，引入奇异函数法推导了柔性双平行四杆机构的静刚度计算公式，在此基础上，分析了柔性双平行四杆机构各尺寸参数对其静刚度的影响，并采用有限元方法对理论模型进行了验证。

An approximate solution of the paraxial ray equation for cylindrical dense electron beams was obtained by means of the Taylor expansion.

本文提出圆柱形强流电子束的傍轴轨迹方程，可以用台劳展开求出它的近似解。

Applying matrix optics to paraxial rays, which travel through different optical elements illuminated with high-power Gaussian beams, the positions of ghost image s affected by Kerr-effect-induced nonlinear refractive index of the illuminated optics are studied.

在近轴条件下，利用矩阵光学的方法研究了高功率高斯光束通过不同光学元件时，克尔效应导致的介质折射率的变化对鬼像位置的影响。

In this paper,a technique to determine the geometrical properties of fractional Fourier transform of paraxial beams based on the phase space beam transformation matrix is presented.

提出一种分析傍轴光束分数傅里叶变换几何特性的相空间束矩阵变换的简单方法。

Chapter 2: The vectorial properties of the paraxial beams propagating perpendicular to the optical axis of a uniaxially anisotropic crystal are investigated.

第二章：研究了垂直光轴入射的傍轴光束在单轴晶体中传输的矢量性质。

The propagation of partially coherent beams through an apertured paraxial ABCD optical system is an interesting but difficult problem encountered in practice.

部分相干光通过受光阑限制近轴ABCD光学系统传输是实际工作中一个十分有意义却是很困难的问题。

Here in the enormous target chamber, the 192 laser beams enter the blue, 33-foot-in-diameter vacuum chamber (the blue hemisphere in the top photo connected to the metallic arms) where they will collide with a target roughly the size of a peppercorn.

在庞大的靶室里，192束激光束进入直径是33英尺的蓝色真空室，在那里跟一个胡椒瓶大小的目标物相撞。

Pergola: Garden walk or terrace typically formed by two rows of columns or posts roofed with an open framework of beams and cross rafters over which plants are trained.

藤架：花园中的棚架，也包括棚架下的常带有两排圆柱的散步小径或阳台。

Pergola: Garden walk or terrace typically formed by two rows of columns or posts roofed with an open framework of beams and cross rafter s over which plants are trained.

藤架：花园中的棚架，也包括棚架下的常带有两排圆柱的散步小径或阳台。

The establishment and relaxation processes of the transient gratings, which are formed by two recording 514nm beams with different polarization directions, SS, PP, SP and ±45℃, are investigated. Using the weak absorption of the chromophores at 632. 8nm and the positive dichroism of the chromophores molecules, a kind of bi-photonic transient gratings, owing to the periodic distribution of Trans and Cis isomers, is established first time in azo-dye doped polymeric bulk sample.

实验考察了两束514nm的写入光在不同偏振情况下（SS，PP，SP和±45），在样品中形成的瞬态栅的建立和弛豫情况；利用偶氮生色团在632.8nm波段的微弱吸收和生色团分子的正二向色性，首次在块状偶氮聚合物材料中形成一种基于生色团反式和顺式异构体密度分布的双色光瞬态栅；利用瞬态栅的快速建立和弛豫，考察了其在衍射型全光开关方面的潜在应用。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。