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By using tabletop femtosecond laser, the pulse which is spatially modulated by the crossed-fiber diffraction passes through the carbon bisulfide. With different input power, the small-scale self-focusing of the pulse was obtained.

具体实验过程是使经过正交细丝的衍射来实现激光的空间调制，然后通过非线性Kerr介质二硫化碳，随着输入功率的增大，超短脉冲开始出现小尺度自聚焦增长现象。

Thus, this paper presents a circular polarization ultra-short pulse laser field of first-order correction, and research in the circle of electronic polarization ultra-short pulse laser correction of dynamic process.

由此，本文给出圆极化超短脉冲激光场的一阶修正解，并研究电子在圆极化超短脉冲激光修正场中的动力学过程。

The length of the pulse is set by the positive clock pulse width.

脉冲的长度是由时钟脉冲宽度的正面。

According to the demand of controlling speed, the system give out corresponding clock pulse to control the speed of the motor through the clock pulse.

控制系统按速度控制的要求从时钟脉冲控制线发出相应的控制脉冲即可对步进电机的转速进行控制。

This paper presents a stepper motor drive control system design, including its clock pulse circuit, pulse distributor, and the drive circuit and power supply design.

摘 要：本文介绍了一种步进电机驱动控制系统设计方案，包括其时钟脉冲电路、脉冲分配器、以及驱动电路和供电电源的设计。

The Pulse property contains the command string used to instruct the modem to use pulse mode for dialing.

脉冲属性包含用于指示调制解调器用于拨号使用的脉冲模式的命令字符串。

A lens and a paraboloid nozzle were used to focus pulsed CO2 laser and generate impulse.Effects of single pulse energy on impulse coupling coefficient was studied with a high-accuracy compound pendulum and a light figure system.Extension range of pulse energy from 5 J to 70 J was obtained through adjusting working voltage of the laser and energy attenuation of silicon combinations in the experiment.

利用透镜聚焦，抛物面喷管约束，结合复摆和光指针测量系统研究了单脉冲能量对吸气式激光推进冲量耦合系数的影响，实验中通过调节激光器工作电压和硅片衰减实现了脉冲能量5-70 J范围的有效拓展；进一步采用纳秒分幅高速相机拍摄了24 J能量下的流场纹影照片。

When the cavity length is 140 cm and the radius of curvature of the full-reflective concave mirror is 300 cm, the Nd:YAG laser is operated in the stable mode-locking and a pulse train with 27 mJ energy and 35 ps pulse duration is obtained.

当腔长为140 cm，全反射凹面镜曲率半径为300 cm时，激光器运转在稳定的被动锁模状态，输出的锁模脉冲序列能量为27 mJ、脉宽为35 ps。

The molten Al-5wt%Cu alloy was treated by electric pulse,and the influence of pulse electric field on its cooling curve was investigated with thermal analysis method.

对A l-5wt%Cu合金熔体进行了电脉冲处理，采用热分析方法研究了脉冲电场对该合金凝固冷却曲线的影响。

As a part of pulse power system, the measurement of pulse current is urgency to be solved.

作为脉冲功率系统的一部分，脉冲大电流的测量也是一个急待解决的问题。

So it was last week in Selma , alabama.

上星期在亚拉巴马州塞尔马市发生的事件也是这样一个转折点。

The group also spearheads various social programs in China.

该组织还带头参与中国的各种社会活动。