光束

The fast Hankel transformation algorithm is used to study the diffractive modulation property of laser beam propagation in high power laser facility.

文摘：利用快速汉克尔变换算法研究了高功率激光在自由空间传输过程中形成低频调制的规律，给出了衍射调制深度与光束宽度及传输距离等参数之间的变化关系。

The proposed method can also be applied to calculation of the losses of other types of laser beams propagating through a hard-edge aperture.

该方法还可用于其它光束通过硬边光阑的衍射损耗计算。

Approximate close-form expression for Gaussian beams passing through an ABCD optical system with hard-edge aperture .

高斯光束通过有硬边光阑ABCD光学系统的近似解析传输公式。

Approximate close-form expression for Gaussian beams passing through an ABCD optical system with hard-edge aperture.

高斯光束通过有硬边光阑ABCD光学系统的解析传输公式。

Generalized M2 factor of laser beams with amplitude modulations and phase distortion passing through hard-edge apertures.

有振幅调制和相位畸变光束通过硬边光阑的M2因子。

As an application example,numerical calculation was performed for partially coherent modified Bessel-Gaussian beams propagating in free space with hard-edge aperture,and the computation errors and application ranges of those analytical equations were discussed.

以部分相干修正贝塞尔－高斯光束在有光阑情况下自由空间的传输为例作了数值计算，对所得解析公式的计算误差和适用范围进行了讨论。

Starting from the polarization matrix and propagation equation of the cross-spectral density matrix, a detailed study of the influence of hard-edge aperture on the spectral switch of polychromatic vector Gaussian-Schell model beams is performed.

从偏振矩阵和交叉谱密度传输公式出发，分析了硬边光阑对多色矢量高斯－谢尔模型光束轴上光谱开关的影响。

Numerical simulation of the transformation of Hermite-Gaussian beams through a complicated optical system with multiple hard-edged apertures.

厄米-高斯光束经过多个硬边光阑复杂光学系统变换的计算模拟。

The transformation of Hermite-Gaussian beams through a complicated optical system with multiple hard-edged apertures was studied by Wen's method.

用Wen的方法研究了厄米-高斯光束通过含有多个硬边光阑复杂光学系统的传输，推导出了具有快速计算优点的传输公式，使计算时间大为减少。

Analysis of the Similarities and Differences of Motorcycle Headlamp Photometry Requirements between ECE Regulations and USA Standards

分析并研究了汽车前照灯光束控制系统的基本组成和电子控制系统的控制过程。

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％。