查询词典 beam-focusing

A "Masthead light" means a white light placed over the fore and aft centerline of the vessel showing an unbroken light over an arc of the horizon of 225 degrees and so fixed as to show the light from right ahead to 22.5 degrees abaft the beam on either side of the vessel.

桅灯是指安置在船首尾中心线上方，在225o 水平弧内显示不间断的白色灯光。其设置应使灯光从船的正前方到每一舷正横后22.5o 内显示。

RULE 21 Definitions "Masthead light" means a white light placed over the fore and aft centerline of the vessel showing an unbroken light over an arc of the horizon of 225 degrees and so fixed as to show the light from right ahead to 22.5 degrees abaft the beam on either side of the vessel.

桅灯是指安置在船首尾中心线上方，在225o 水平弧内显示不间断的白色灯光。其设置应使灯光从船的正前方到每一舷正横后22.5o 内显示。

However,in practice, the excursion ,transmission refraction and optics aberrance of the laser beam will affect the measuring precision.

但在实际应用中，激光光束的漂移、传输折射以及光学畸变对测量系统的测量精度具有不可忽视的影响。

The formation mechanism of the absolute instability and gyrotron backward wave oscillations is analyzed, and the methods to suppress the parasitical modes are discussed.The nonlinear theory model of gyro-TWT is consummated by considering the influence of tapered magnetic field and waveguide radius, electron velocity spread, and waveguide loss on electron beam-wave interaction. The large-signal characteristic of gyro-TWT, such as launching loss and absolute instability, are also analyzed in detail. This work establishes the foundation for the development of a gyro-TWT amplifier.

重点研究了两段损耗波导结构和损耗陶瓷结构回旋行波管中的电子注-波互作用，分析了绝对不稳定性和回旋返波振荡的形成机制和抑制寄生模式的方法；完善了回旋行波管的非线性理论模型，并考虑了磁场和波导半径渐变、速度零散、波导损耗等因素对注-波互作用的影响；详细分析了发射损耗、相位稳定性等回旋行波管的大信号特征，为回旋行波管放大器的研制奠定了基础。

Collapse behaviors of the thin salled beam such as load deformation curve and energy absorption characteristics are also analyzed in this paper.

在汽车碰撞的有限元仿真建模中，连接方式的模拟在建立整车碰撞模型中是十分重要的一环。

The function of pulse power system of LIA is generating accelerative pulse and providing it toaccelerate electronic beam synchronously.

在直线感应加速器中，脉冲功率系统的作用是向加速器提供与被加速电子束同步的加速脉冲。

High power electron accelerator is the key installation which supplies electron beam to desulfurize from factory smoke, it is required to give stable DC of 500 mA and can operate for long time continuously.

大功率电子加速器是用电子束进行电厂烟气净化的源装置，要求稳定发射直流500mA，且适用于连续长时间运行。

As walk-off angle and acceptance angle of beam limit the conversion efficiency and the tunable wavelength range of difference frequency generation, research include effective nonlinear coefficient, walk-off angle and acceptance angle as functions of wavelength, the relationship between conversion efficiency and acceptance angle, and the impact of crystals length on the process of frequency conversion.

由于光束的走离角、允许角限制了转换效率和差频调谐波长范围，研究内容还涉及了有效非线性系数、走离角和允许角与波长的关系，转换效率与允许角的关系，以及晶体长度在频率变换过程中产生的影响。

From the view of increasing diffraction efficiency, the interaction between Gaussian beam and acoustic wave is experimentally studied.

实验测量了调制频率变化对声光调制器衍射效率的影响，并用波矢量匹配的概念对测量结果进行了分析。

The solidification step may be performed by any means known in the art other than by exposure of the etch-resist ink to actinic light and/or particle beam radiation sources.

的凝固步骤可能会以任何方式出名的艺术品，而不是由其他蚀刻曝光，抵制油墨作用光和/或粒子束辐射源进行。

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％。