光束

The simulation results show that the amplifer with this configuration can obtain higher extractive efficiency and higher beam quality.

比较了不同的放大器输出特性，理论表明基于偏振方式的两级放大可获得较高的提取效率和光束质量。

In mode matching state, the mode volume and the facula radius are further improved, and the quality of the output beam has also been improved.

在匹配状态下，有效基模模体积及输出镜上光斑半径得到了较好的改善，输出光束的质量得到了较大的提高。

Simulated ray of the beamline has been built to check and measure sagittal focusing facula.

建立了光束线模拟光路，可以实现对弧矢聚焦效果的检测。

It showed that the energy focusability of the diffraction beam depended on the transmission distance,diffraction aperture and facula radius,and appropriate energy focusability could be obtained by controlling some parameters of the optical system.

研究结果表明，衍射光束的能量集中度与传输距离、衍射孔径、光斑半径等参量有关，通过对光学系统参量的控制，可得到合适的能量集中度。

Whether it's the speeded-up glow of car headlights in a night-time city scene, an alien spacecraft or a deep-sea jellyfish you're recreating, this far-out neon look is a highly useful trick to master. It conveys a sense of movement and energy, and the colours can be tweaked to give a surprising range of effects.

不管是在不夜城里高速行驶的汽车尾灯，一个外太空的飞船或是你要重建的深海水母，这种时尚的氖光束都是很有必要掌握的一种技法，她展现了运动和能量的一幕，还可以通过调整色彩从而达到一种流光溢彩的效果。

This technique overcomes the problems of spectrum shifting and low precision,which exist in traditional wave-front reconstruction of CRSI based on fast Fourier transformation.

该技术解决了基于傅里叶变换法的CRSI波前重建技术中存在的频谱移中和精度不高的问题，并且只需单幅CRSI图即可重建待测波前，可用于光束波前的动态测量。

It is found from the analytical expression that the truncation parameter, which is defined as the ratio between the waist of the Gaussian beam and the radius of the lens, has an important effect on the diffraction field distribution of the lens.

应用这个表达式研究了截断参数（透镜的半径与高斯光束束腰半径的比值）对透镜衍射场分布的影响。

The electric field in the beam of sunlight sets the electric charges in the molecule in vibration.

太阳光束中电场使这一分子内的电荷振动。

The product of Fourier series and a finite sum of complex Gaussian functions is used to approximate the window function of a hard-edged aperture, an improved algorithm for the beam propagation through a paraxial ABCD optical system with hard-edged aperture is proposed.

使用傅里叶级数与有限个复高斯函数之和的乘积作为硬边光阑的窗口函数的近似式，提出了含硬边光阑近轴ABCD光学系统对光束变换的改进算法。

With aperture expanded as the sum of finite complex Gaussian terms, a more practical approximate analytical solution of fractional Fourier transform of Gaussian beam in an apertured paraboloid refracting system is obtained and also numerical investigation is presented.

通过将孔径函数展开为有限项复高斯函数之和，得到了高斯光束在受孔径约束的抛物面折射系统中分数傅里叶变换较符合实际的近似解析表达式，并进行了数值模拟。

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％。