脉冲波

Variations of attenuation coefficients with rain rate for MP and LP model are compared under Mie theory and Rayleigh approximation. The approach to the solution of the Fourier integral in closed form is adopted for pulse propagation through rain medium .

在此基础上应用傅立叶时域积分近似解的方法研究了毫米波段脉冲波通过雨介质时，脉冲畸变随频率、降雨率、传播距离及脉冲宽度变化的关系。

The function relation of pulse group velocity with frequency and rain rate is obtained.

分析了脉冲波展宽效应机理，得到脉冲波群速度与电波频率、降雨率的函数关系。

It was found that the pulse distortion can be quite severe depending on frequency, pulse width ,and path length.

应用傅立叶时域积分近似解方法对毫米脉冲波通过雨媒质时的传输特性进行了研究和分析，得出了脉冲畸变随频率、降雨率、脉冲宽度及传播距离的变化关系，讨论了脉冲展宽与压缩随传播常数二阶导数的关系。

In this paper, numerical computations are made on the scattering of ultrasonic pulse waves with different centroid frequencies of 100 kHz,500 kHz and 1 MHz in fluid-filled finite-length perforation by using Finite Element Method,where three kinds of models of perforation bottom, I.E., flat bottom, stepped bottom and acuminated bottom,are assumed to simulate the practical bottoms of perforation.

乔文孝，杜光升。射孔孔眼中散射超声脉冲波的FEM模拟。测井技术，2001，25（2）：96～100 采用有限元素法，分别数值计算了平底孔道、台阶式孔道和尖劈状孔道等3种孔眼模型中不同中心频率(100 kHz、500kHz、1 MHz)的散射超声脉冲波。

Station communications subsystem battery discharge due to the long-off and other reasons to enable to shorten battery life or near end-of-life issues, the charger using electronic sweep pulse technology, uninterrupted electricity to issue a specific pulse frequency, the use of momentary high-current activation "ill "battery plate, electric pulse so that re-crystallization of lead sulfate crystals into a small, highly reversible electrochemical activity of lead sulfate to be able to participate in the normal charging and discharging of the electrochemical reaction, so that waste batteries back to life, back to and new battery is almost the same capacity, the same time, greatly extended battery life.

针对通信机站子系统蓄电池因长期过放电等原因使蓄电池寿命缩短或接近报废的问题，该充电机采用电子扫频脉冲技术，不间断地发出特定频率电脉冲波，利用瞬间大电流激活&生病&的电池极板，电脉冲波使硫酸铅结晶重新转化为晶体细小、电化学活性高的可逆硫酸铅，使其能够正常地参与充放电的电化学反应，使废旧的蓄电池起死回生，恢复到与新电池几乎一样的容量，同时大大延长了电池使用寿命。

With the propagation of the input negative-falltime pulse along the transmission line, the capacitance of varactor diodes is decreased by the increase of reverse bias voltage, and the variation in propagation delay at the nodes results in the compression of negative-going wavefronts during propagation.

随着输入脉冲在传输线上的传播，变容二极管的电容随反偏压增大而减小，导致每个节点传播延迟的变化，从而压缩脉冲波前，产生前沿可达1ps的超快脉冲。

The characteristics of the three main parts of mono-pulse slotantennas——longitudinal radiating slot, center-inclined slot and magic T using couplingslot, are analyzed. Also the influence of the design parameters, such as the length and width of the slot etc., are analyzed. The engineering curves of design are given, and some beneficial conclusions are gained too. These also give powerful supports for the design of slot antennas.

针对毫米波单脉冲波导缝隙天线的三个主要组成部分——波导宽边辐射纵缝、波导宽边中心斜缝和宽边缝隙耦合魔T的特性及其各项设计参数(如缝隙长度、宽度、半高波导、全高波导等)对性能的影响进行了较为全面、详细的分析，给出了相应的工程设计曲线，得到了一些有益的结论，为高性能波导缝隙阵列天线的设计提供了有力的参考。

With sine pulse output,the instrument has a wider range of therapy through choosing the use of continuous waves and pulse wave.

本机具有正弦、脉冲输出，有选择地使用连续波和脉冲波扩大了治疗的范围。

Output Pulse Wave:unsymmetrical dual directional pulse wave including continuous,and uneven random waves.

输出脉冲波形：非对称双向尖脉冲波，分无周期规律的随机脉冲和有规律的连续脉冲。

0Utput Pulse Wave:unsym met ricaldual directional pulse wave including continuous,discontinuous and uneven waves.

输出脉冲波形：非对称双向脉冲波，分连续波、断续波以及疏密波。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。