脉冲

On IOPO,for high-power pumped KTP OPO in Nd:YAG laser(Q-switching and Xe-lamp pumped)cavity,convert efficiency up to 45% is measuredfor both linear and T-shape structure with various cavity mirrors.

脉冲宽度太宽，泵浦功率密度上升的较慢，参量光的增益较小，信号光建立时间就会被延迟，也不会获得较高的转换效率。

A sufficient condition of quadratic stability for the impulsive and switched systems is given with a switching law by way of convex combination and single Lyapunov function.

在有限个备选状态反馈控制器的条件下，利用凸组合技术和李雅普诺夫函数等方法，给出脉冲切换线性广义系统二次稳定的充分条件及切换律的设计。

A colliding pulse mode-locked unstable resonator Nd: YAG laser is designed, which consists of an antiresonant ring and a convex mirror.

设计由抗共振环和凸面反射镜组成的对撞脉冲锁模非稳腔Nd：YAG激光器。

In the design,the optimum radius of the rear convex mirror was presented which could efficiently compensate the effect of thermal lens,and the resonator would become a equivalent stable resonant operation dynamically. A slope efficiency of 13% and beam divergence of 1.3 mrad were achieved.

选择的凸面全反镜的最佳曲率半径有效地补偿了增益介质热透镜效应，激光器实现了动态稳腔运转，激光脉冲能量输出斜度效率大于13%，光束发散角优于1.3 mrad。

According to induced response method, the expression in frequency domain of pressure response at the end of pipeline is derived using impulse response method and convolution theorem. The expression indicates that that transfer function is only related to the characteristics of pipeline system and the Fourier transform of flow variable only depends on the operating characteristics, and the pressure response in frequency domain is linear with the Fourier transform of flow variable.

基于激励响应法，应用脉冲响应方法和卷积定理得出了管道末端压力响应在频域中的表达式，此式表明：传递函数只与系统的特性相关，流量变量的傅立叶变换只与操作特性相关，且压力频域响应与流量变量的傅立叶变换为线形关系，根据此式在理论上能够得到管道泄漏点的重要信息。

Firstly, a balance equation is erected, And then,on the basis of the predecessor formula and with the Convolution Theorem and Fourier inverse transforms,a semi-analytical solution of the velocity response in time-domain under semi-sine exciting force is given.

建立成层土中桩纵向振动平衡方程，利用卷积定理和傅立叶逆变换求得半正弦脉冲激振作用下桩顶速度响应的半解析解。

In this paper, based on the analysis of the structure, movement principle and math model of PMSM, fundamental theories of vector control, coordinates transform and algorithm of space vector PWM are introduced and PI control, speed and position calculation methods are discussed.

本论文在分析了PMSM的结构、运动原理及数学模型的基础上，系统地阐述了PMSM交流伺服系统矢量控制的基本原理、坐标变换方法及空间矢量脉冲宽度调制波的生成算法，论述了PI控制算法和速度位置计算方法。

This paper studies the reachable domain of a satellite after a coplanar single impulse with fixed magnitude applied.

对在初始轨道上施加平面内幅值固定的脉冲后卫星的可达范围进行了研究。

Study of effects of fly-ash and water in the process of SO2 removal by pulsed corona discharge［J］.

飞灰和水在脉冲放电脱硫中作用的研究［J］。

The removal rate of SO2 can be increased by 5% in pulsed corona discharge and reach above 90%.

同时，水蒸气电晕放电能使脉冲放电的烟气脱硫率提高5%左右，达到90%以上。

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。