脉冲

It is a key problem to detect the ultrashort pulse in optical communication system.

1引言在光纤通信系统中，随着基于1.55μm波段皮秒～亚皮秒范围的超短光脉冲的光时分复用系统的飞速发展，超短光脉冲的检测问题变得越来越重要了。

When the numbers of high - amplitude pulse were among 1-3 pulses, the relationship between the number of pulse and MPF of click song was approximately linear, otherwise was nonlinear.2、 The bandwidths of the song were nearly 2700 - 6700Hz when the songs were produced by a pair of tymbals.

本文进一步阐明：1、高幅值PT多含有11个脉冲，当含有1，2，3个时，脉冲个数与MPF成准线性关系超过三个为非线性关系。2、双发声膜发声的频带主要在2700Hz-6700Hz之间。

This experiment was in a creative way to adopt the high pressure and square wave to drive the electric light Q-Switch, achieving dual-wavelength、dual-pulse Cr:LiSAF tuneable laser output.

为实现单光束、双波长、双脉冲Cr：LiSAF调Q激光输出，实验中创造性地采用高压方波驱动电光Q开关实现了双波长、双脉冲的Cr：LiSAF可调谐激光输出。

Secondly, the operating principle and the mathematical model and the control method about the three-level voltage source high power factor PWM converter are analysed .The generation of the PWM trigging pulse control signal are introduced emphatically. On the basis of this, the hardware experimentation circuits are built with DSP and CPLD, and the trigging pulse signal is generated exactly. The feasibility of the circuit is verified by the experiment result.

其次，分析了三相电压型变流器的原理、模型、控制方法并着重研究其PWM 触发脉冲控制信号发生技术，并以DSP、CPLD 等芯片搭接了硬件试验电路，产生了正确地触发脉冲信号，试验结果证明了设计的合理性。

By careful study to the deflection response of a hinged-fixed circular plate u nder concentrated impulse loading,the saturated impulse phenomenon in the proces s of response is discussed.

利用有限变形弹塑性连续体的最小加速度原理，建立了分析圆板动力响应问题的数值方法，并通过对均匀分布的脉冲载荷作用下铰支圆板位移响应的细致分析，探讨了响应过程中的饱和冲量现象，指出对于高载范围内的脉冲载荷，相应于最大变形的饱和冲量确实是存在的。

RESULTS: Patients, treaters, and raters were effectively masked. Minimal adverse effects did not differ by treatment arm, with an 88% retention rate (90% sham and 86% active).

干预措施：以120%的运动阈值（频率10赫兹，每系列持续4秒钟，其中每系列脉冲之间间歇26秒）时间为37.5分钟（每次治疗期间给与3000个脉冲），治疗仪器采用8字形固体核心线圈，假对照组采用的仪器是一个相似的线圈，将镍镉耐热合金插入其中以屏蔽磁场，阻止头皮电极传导双侧躯体本体感觉。

In the chemoprophylaxis plus intermittent pneumatic compression group, no deep venous thromboses were found in patients who received more than six hours of intermittent pneumatic compression daily.

在药物预防加用脉冲式气动加压组，每天接受脉冲式气动加压超过6小时的患者，没有发现深静脉血栓形成。

In the chemoprophylaxis plus intermittent pneumatic compression group, no deep enous thromboses were found in patients who receied more than six hours of intermittent pneumatic compression daily.

在药物预防加用脉冲式气动加压组，每天接受脉冲式气动加压超过6小时的患者，没有发现深静脉血栓形成。

Background— The high mechanical index impulses from a diagnostic ultrasound transducer may be a method of recanalizing acutely thrombosed vessels if the impulses are applied only when microbubbles are channeling through the thrombus.

背景—从超声诊断传感器传出的高的机械指数脉冲可能是再穿通急性血栓形成的血管的一种方法，假如这种脉冲应用仅当微气泡是多路传导通过血栓。

The pulsewidth and the effects of the intracavity parameters on pulse duration for a Z-shaped solid-state KLM laser and a compact 3_mirror solid-state KLM laser are theoretical predicted.

从理论上预测了Z字型腔固体KLM激光脉冲和短腔三镜腔固体KLM激光脉冲的脉宽及其腔内各参数对脉宽的影响。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。