激光

For a high laser intensity and small spot size, an electron may escape from the laser and can retain energy gain.We obtain analytical expresses of electron instantaneous momentum. Taking the plane wave of Gaussian laser for an example, we derive electron distribution function over instantaneous values of electron momentum and energy.

本文考虑电子初始温度不高(约100eV)以及脉冲长度很短(约4-6个激光波长)时，也能得到两群高能电子群；在脉冲长度极短(仅有2-3个激光波长)和电子初始温度不太高的情况下，就有明显的三群高能电子群出现，且如果激光功率密度大于5×10~(18)wcm~(-2)时，高能电子的温度也达到MeV。

In this paper, a new technology of laser transformation hardening which could replace the present method of gear case hardening is introduced. Its significant and economic value are analyzed. The key techniques of laser transformation hardening gear , such as surface pretreatment coating and its methods, laser scanning pattern, are discussed in detail.

通过分析可替代常规齿轮渗碳淬火的激光齿面淬火新技术研究的意义及经济价值，着重讨论了齿面激光淬火的关键技术--表面预处理涂层与方法、激光扫描方式。

The results indicate that relationship between hydrogen fluoride laser and aluminum is different from that between CO2 laser and aluminum.

结果表明，氟化氢激光与铝靶相互作用得到的冲量耦合系数和激光功率密度的关系与CO2激光不同。

The professor of Northwest University, he is the chairman of Xi'an Laser and Infrared Society, vice-chairman of Shaanxi Illuminating Engineering Society, member of SPIE(The International Society for Optical Engineering).His major is optics and optoelectronics.

现社会兼职：西安激光红外学会理事长，陕西省照明学会付理事长，河南省照明学会常务理事，郑州国家交流协会副会长，并曾任《激光杂志》副主任，《中国激光》第三、四届编委。

The perturbative theory of laser induced collisional charge exchange is presented, in which the laser induced collisional charge exchange is described as a four body system and the compound atomic and ionic states are used as basis states of LICCE, and the equation of motion for the probability amplitudes of the states are obtained.

将激光感生碰撞电荷交换看作一个四体系统，发展了激光感生碰撞电荷交换的微扰理论；以独立原子和离子的复合态波函数作为激光感生碰撞体系的基组函数，得到了体系态振幅的运动方程。

Under the current experiment conditions, it is difficult to completely understand the characteristics of laser ignition of energetic materials because of instantaneity and complexity of the process. Thus, researchers attach widespread importance to the method of numerical simulation.

由于含能材料激光点火过程的瞬时性和复杂性，在目前的实验条件下难以全面地了解含能材料的激光点火特性，因此用数值模拟方法来分析含能材料的激光点火特性受到人们的普遍重视。

In the process of transmitting and coupling of laser energy, there are some factors which caused energy lose. By doing experiment, these factors can be analyzed. Besides, since the instantaneity and complexity of the process, now it is difficult to completely understand the characteristics of laser ignition of energetic materials.

在激光点火系统中，激光能量的传输和耦合效果对激光点火非常重要，可用实验的方法测量能量传输过程中的能量损耗。

Its characteristic is through impulse stimulation by using the grating width, diffraction series, laser wavelength, and the Doppler frequency shift to determine the shock velocity and the shock acceleration instantaneous value.

对差动式光栅激光干涉冲击校准装置的原理作了介绍，特点是使用冲击激励，通过光栅的栅距、衍射级数、激光波长及激光的多普勒频移来最终确定冲击速度和加速度的瞬时值。

The numerical calculation results indicate that, when the transitional process has finished, the temperature rising speed of inwall and outerwall is almost a constant, and the temperature difference of inwall and outerwall keeps invariably during laser irradiation.

利用有限元法对金属球壳在恒定功率密度激光辐照下的热效应进行了数值计算，分析了在激光辐照过程中，金属球壳内外壁的温升、温差的变化规律，并主要以铜、铝材料为例，比较了铜、铝球壳在激光辐照下的温度变化和外壁温度响应情况。

Methods Seventy-five cases (102 eyes ) of PACG and fifty cases (100 eyes) of crowds with high degree danger were treated with combined laser technique, including laser peripheral iridectomy or argon laser peripheral iridoplasty.

对75例102眼PACG以及50例100眼PACG的高危人群，行联合激光手术治疗，包括激光周边虹膜切除术(laser peripheral iridectomy， LPI)或联合Argon激光周边虹膜成形术(Argon laser peripheral iridoplasty， ALPI)。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新