激光

It is found that the phase-conjugate fifth-order polarization beat is due to the interference between fifth- and fifth-order optical polarizations,the beat signal oscillates not only temporally but alsospatially,and the measurement accuracy for laser absolute frequency could reach thesame order of magnitude as the laser linewidth.

发现相位共轭五阶极化拍频是五阶非线性光学极化强度之间干涉的结果，拍频信号不仅进行着时间振荡而且同时进行着空间振荡，它对激光绝对频率的测量可达到与激光线宽同一量级的精度。

Lumped method for the measurement of laser absorptance of materials .

送粉式激光熔覆过程激光有效能量的表征方法。

A new theoretical model has been developed to describe the whole ablation process,including the effect of dynamic absorptance and evaporation.

提出了描述整个飞秒多脉冲激光烧蚀过程的物理模型，模型考虑了多脉冲烧蚀的新的特点，考虑靶材吸收率随温度的变化和蒸发效应，建立了激光烧蚀不同阶段的热传导方程，给出了相应的定解条件。

To determine the laser power accurately, the absorptance of the aluminum surface to the laser energy must be given and the measure methods has been...

对比了不同激光功率密度、扫描速率和不同粉末粒度、粉末预置厚度条件下所形成的熔覆层，确定了铝合金表面激光熔覆的工艺参数范围。。。。

The parameter of laser energy transfer efficiency is used in the new model with a clear physical meaning for the first time. The mean absorption factor of laser induced plasma to the laser within the keyhole is calculated according to different welding parameters using the relative intensity method of spectral lines.

首次有机地将激光焊接能量传输效率这一重要的焊接参数以明确的物理意义引入数学模型中；通过谱线相对强度法计算推导出每一个焊接规范下小孔内等离子体对激光的平均吸收系数。

Furthermore,the model system can be used to generate a larger refractive index with zero absorption.

这个系统可以展示从较高激发态到基态的无粒子数反转激光增益，也可以用来实现粒子数反转激光，同时这个系统还可以产生无吸收的较大折射率。

Finally, it is our most important chapter which discus the two-level systems which interacted with the Shaping-pulse dynamic progress of the absorption, dispersion and refractive index.

在后面几部分的讨论中就会发现，采用布洛赫矢量方法讨论激光脉冲同系统的相互作用，可以形象直观的从理论上观测到色散和吸收或辐射的动态演化过程，既有利于教学演示，又有助于帮助实验寻求更方便的激光整形方式。

The laser frequency is stabilized by absorption spectrum line of atoms in magnetic field.

这种方法能够将激光频率稳定地锁在原子吸收谱线的峰值处，锁频后激光器不易失锁，用于激光冷却铷原子实验。

In this paper, the effect of the absorption spectrum radiated by laser, ultroviolet and red light on DNA has been studied.

激光对生物的诱变遗传效应的研究，本质是激光与 DNA相互作用的结果。

With the help of item funds including the experimentation technology of the total accouterments department and the martial research and Ordnance Engineering College's fund, a series of research work have been finished, which is about the high power laser damage to optical material, optical elements, optoelectronic sensors and optoelectronic system.

本论文在总装试验技术项目、军队科研项目和解放军军械工程学院重点基金等的资助下，开展了强激光对光学材料、光学元器件、光电探测器件和光电系统的干扰、破坏以及强激光防护技术的研究工作。

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