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Chapter 2、When treat propagate problem of high power laser beams, ordinary assume beam to be ideal plane wave or Gaussian. Actually, beams is not ideal Gaussian or plane wave. The reason is that is phase aberraed and intensity nonuniform. In this chapter, we have developed a method on frequency conversion of aberrated beam. Based on statistical optics method and within the limits of thin crystal, we have studies on second harmonic generation of the phase aberrted beam. And the phase aberration is assumed to be a Gaussian random variable.

第二部分：在处理高功率光束传输问题中，通常假设光束为理想平面波或高斯型，而实际光束都不可能是理想的高斯光束或平面波，均会有一定的位相畸变及光强不均匀，本部分从统计光学的观点出发，在薄晶体近似下，建立了具有高斯型随机相位畸变光束倍频转换的一种统计描述方法，并对倍频转换光束的横向空间特性进行了分析。

The article analyses the general situation of topology technology for single-phase PFC,discusses the development of topology technology for single-phase PFC from characteristic aspect and gives out the trend of development of topology technology for single-phase PFC in future.

文章分析了单相功率因数校正电路技术的概况，从实现的方式及其特点等方面较系统地论述了单相有源功率因数校正电路拓扑技术近期的发展，并指出了今后单相功率因数校正电路技术的发展趋势。

YTSZ-series VVVF variable speed three-phase induction motors metallurgical and crane use,based upon YTSP-series VVVF variable speed three-phase induction motors, are newly developed series of products by our company in accordance with the operating feature of metallurgical and crane three-phase induction motors.

YTSZ系列冶金及起重用为频调速三相异步电动机，是我公司在YTSZ系列变频调速三相异步电动机的基础上，根据冶金及起重用三相异步电动机使用特点而开发的系列产品。

The physics of solid behavior in the two-phase flow of high-density particle phase is carried a step forward, providing the basis of further development of the two-phase flow interior ballistics theory.

从而将火炮装药条件下的高密度固相两相流中固相行为的物理描述向前推进了一步，为火炮两相流内弹道理论进一步发展，提供了一个基本条件。

According to the different characters of lag phase, log arithmetic phase and stationary phase in a kind of fermentation process, we propose a more stage nonlinear dynamic system and its identification model.

本文针对一类发酵过程中的发育期、生长期及稳定期的不同特性，提出一种非线性多阶段动力系统及其辨识模型。

To fly to the solar system space probes to other planets whose flight can be roughly divided into three stages, namely, from launch to the Earth's scope is not out of phase, out of the scope of the Earth's role in the transition phase, when mainly affected by solar gravity and scope to the target planet is the first three-phase, after which the planet could be captured by the target satellite, or left the target planet became the man-made asteroid.

飞往太阳系其他行星的空间探测器其飞行大致可分为三个阶段，即从发射到未脱离地球作用范围阶段，脱离地球作用范围的过渡阶段，这时主要受太阳引力作用，进入目标行星作用范围是第三阶段，此后可能成为被目标行星俘获的卫星，或者飞离目标行星后成为人造小行星。

The phase pattern of velocity of molecular motion is compared in saturated state of liquid phase and vapor phase.

应用本文提出的约化规模法，获得了不同温度条件下分子分数布朗运动的Hurst 指数和轨迹分维数

Was packed electrokinetically and the separation performance of basic compounds was investigated in the pressurized capillary electrochromatography system using 1 μm nonporous bare silica spheres as stationary phase and acetonitrile-water as mobile phase. The effects of the composition of the mobile phase, the concentration of the buffer, pH value, applied voltage and so on on the separation performance were investigated.

以乙腈-水体系作为流动相，详细考察了碱性化合物在该色谱柱上的加压电色谱分离性能，讨论了流动相比例、缓冲液浓度、pH值及操作电压等因素对分离的影响。

The structure and the operating principle of a three-phase power phase se-quence and open phase detecting circuit is presented in this paper.

介绍了一种三相电源相序及断相自动检测电路的构成及工作原理，实践证明该电路是可行的。

And by applying the linear dispersion relation of wave, all the properties of wave refraction including wave rays, constant phase lines, phase function and crest lines etc., can be expressed in explicit functions. By introducing an orthogonal curvilinear coordinate along the wave ray and the constant phase line, and with an estimated scale factor, the refraction coefficients along any wave ray can then be determined. The present results are verified by ordinary wave ray theory and some previous numerical results.

就此特例情况在波浪的线性分散关係的应用下，前进波浪折射现象的整体特性，包括波向线、等位相线、位相函数与波峰线皆被导述出明確显然的函数表示；同时引入由沿著波向线与等位相线所构成的完全符合波浪折射几何通性的正交曲线座標，求出其尺度因子后，由能通量守衡原则定出沿著任一条波向线上的折射係数；並由之对往昔纯依两相邻的波向线间的几何类比所给定的折射係数给予导証之。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。