脉冲

The essence of range measurement technique in pulse laser fuzes is to measure the time difference of transmitted pulse and echo pulse.

采用电子计数法实现脉冲激光引信定距的本质是测量发射脉冲和目标反射回波脉冲的时间差。

Between these two parts is inserted an insulating transfo- rmer which transmits the control paise and isolates the high potential difference between them.

控制线路主要包含一次脉冲发生器和二次脉冲装置二部分，在这二部分之间有绝缘变压器，负责传递脉冲电压并隔离高电位。

And then to study the both structures' emission characteristic.It was found that the Al-AlN could emit electrons. The two different structures' emission efficiency has prodigious distinction. The first one whose electron emitter film is on the top was much easier to engender the straitens gaps. And it could engender the straitens gaps at larger area than the other one.

经过实验我们发现(1)对于发射层位于电极之上的结构观测到可测量的发射电流(2)当电子发射层位于电极之上，一排电子发射单元的总电阻介于20~150Ω之间时，电形成过程中，给电极间加脉冲电压，在第一个脉冲周期中就能把Al-AlN电子发射薄膜烧断；而对于电子发射层位于电极之下的结构，在电形成过程中，则需要几个脉冲周期之后才能将电子发射薄膜烧断。

The experiment was performed at the Asterix IV iodine laser with a prepulse 5 ns before the main pulse. Under optimum focusing conditions for main pulse and prepulse the X-ray laser beam splits into two beamlets along the target surface at its output end of the 2.5 cm long plasma column. The splitting was still observed when the prepulse alone was defocused.

实验发现在抽运激光主、预脉冲最佳聚焦条件下， X射线激光束在2.5 cm长的线状等离子体输出端沿靶面方向分裂成两束；在抽运预脉冲单独散焦条件下，仍然观察到这一分裂现象；但是当抽运主、预脉冲同时散焦时，这一分裂现象逐渐消失并获得了半宽度只有40 μm的非常窄的近场像。

The solution of the optimal 3-impulse rendezvous is a multi-variable iteration process. For the 3-impulse rendezvous with terminal coastings, the symmetry characteristic of optimal 4-impulse rendezvous was applied to reduce the number of the iteration variables to save the calculation consumption.

三脉冲最优解的求解采用多变量迭代的方法；对于存在端点滑行段的三脉冲最优解的求解，利用四脉冲最优解的对称性，减少迭代变量的数量，降低了计算量。

This gleam of the sexual relationships existence, adds step-by-step electric motor characteristics such as only having the cyclicity error but there being no accumulative error.

在非超载的情况下，电机的转速、停止的位置只取决于脉冲信号的频率和脉冲数，而不受负载变化的影响，即给电机加一个脉冲信号，电机则转过一个步距角。

The gain control of PMT was complemented by the aid of adding the high voltage pulse to the last dynode of PMT to change the electric potential difference between the last dynode and front dynode.

实验结果明：在选通和变增益脉冲到来时，阳极输出相应的脉冲信号，信号脉宽为40ns，脉冲幅值增大，证明该方法能够实现PMT选通和变增益。

The 1500V DC feeder cable is one of the key devices for the safety operation of subway system, and its insulation status directly affects the security of electricity supply of rail traffic.

为解决地铁直流电缆电气接线的特殊性而导致其放电检测中存在的大量干扰信号，实验研究了整流装置产生的整流脉冲、机车启动制动产生的电流脉冲、随机性脉冲信号及其它电子设备产生的窄带信号等干扰信号的特征。

In order to get a clear insight into the nature of this cleaning process and provide a solid basis for the industrial applications, this dissertation focuses on the fundamental investigation of the rigid ceramic candle filter, mainly including experimental study, theoretical analysis and dynamic modeling of the unsteady flowfield in the whole pulse cleaning process.

针对刚性陶瓷过滤器在其理论和工程应用中存在的问题，本论文对脉冲反吹全过程中气体引射空间和滤管内外空间的瞬态流场进行了系统的实验研究和理论分析，在此基础上进行了数值模拟并建立了脉冲反吹系统数学模型，提出了改进脉冲反吹清灰效果的阻尼式气体引射器。

Switching Power Supply has three kinds of control circuits: Pulse Width Modulation, Pulse Frequency Modulation, Pulse Width and Frequency Modulation.

开关电源有三种控制方式：脉冲宽度调制、脉冲频率调制、脉冲宽度频率调制。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。