a wave in which the medium moves in the direction of propagation of the wave

the existence of traveling wave solutions to reciprocal model with age sections structure was discussed.

讨论了一类分年龄段的生物种群互惠模型的行波解存在性问题。

an optimization method is proposed to improve the reliability of getting the traveling wave head, smoothing both beginning and ending data.

并进一步提出了通过平滑处理故障首尾数据的优化方法提高行波波头提取的可靠性。

an electric contact method to measure contact state of stator and rotor in traveling wave type ultrasonic motor(twusm) is presented.

提出了一种直接测量行波超声马达定子和转子接触状态的方法—电接触法。

based on this work, a broadband and a narrowband disk-loaded waveguide for the relativity traveling wave tube are designed.

在此基础上设计了可用于相对论行波管的一种宽带和一种窄带的盘荷波导结构。

in this paper, control for seismic responses of bridges under traveling wave excitation is performed using mr dampers.

本文应用磁流变（mr）阻尼器对桥梁结构在行波激励下的地震反应进行控制。

an integral expression for the time domain output response of traveling wave (tw) electrooptic phase modulator is derived by using the scalar wave equation and fourier transform technique.

从标量波动方程出发，采用傅里叶变换的方法，导出了行波电光相位调制器的时间域输出响应的计算公式。

finally, we obtain the existence and asymptotic behavior of the traveling wave solutions of the considered system.

最后，我们证明了比率依赖型捕食者-食饵系统行波解的存在性和渐近性。

based on the traveling wave, double ended approach only deals with the first transient traveling wave reaching the two buses of the fault line.

基于行波的输电线路双端测距算法只用到到达故障线路两侧母线的第一个故障初始行波波头，其可靠性较高。

fremont, calif., 18 may 2008. db control won a contract from a major defense contractor to provide coupled-cavity traveling wave tube (twt) amplifiers to be used for radar applications.

db控制公司从一家主要国防合同商那里获得一项合同，提供耦合腔行波管（twt）放大器,用于雷达设备。

multi-span continuous bridges have large extended length longitudinally, the more rational method for seismic response analysis should be performed considering the traveling wave effect.

多跨连续梁桥纵向延伸长度比较长，进行地震反应分析时应考虑地震波有限波速传播所引起的行波效应。

because of the current on the shunt reactor, traditional traveling wave differential protection cannot be applied to transmission line with shunt reactor.

由于并联电抗器两侧的电流发生变化，传统的行波差动保护无法应用于带并联电抗器的输电线路。

based on this, the structure, working principle and fixation of the traveling wave ultrasonic motor are researched.

在此基础上，对所采用的行波型超声波电动机的结构、工作原理及定位进行了研究。

high efficiency and high linearity space traveling wave tube (twt) is required for satellite communication system as a high power, high gain microwave amplifier.

作为卫星通讯系统所用的高增益、高功率微波放大器件，行波管的效率和线性是非常重要的。

the traveling wave tube(twt) is an important high-power microwave resource which has been applied in many fields such as radar communicating broadcasting high-power microwave weapon and so on.

行波管广泛应用于雷达、通讯、广播、电子战、高功率微波武器研究、高能物理、电子对抗等各种电子设备中，是一种非常重要的微波器件。

with such features as high power, broadband, multi-mode, etc. , traveling wave tubes (twt) plays an important role in the high power microwave amplifiers.

行波管以其高功率、宽频带、高增益和可多模工作的特性，在当今微波频率的功率放大器中占有重要地位。

based on the traveling wave theory, a new method for determining the junction parameters of piping systems is presented.

基于结构振动的行波理论，提出了一种管道联接件物理参数识别的新方法。

in fault location system based on traveling wave, the measurement accuracy of traveling wave velocity influenced the fault location accuracy to a certain extent.

行波故障测距系统中的行波波速测量的準确性在一定程度上影响了行波测距的精度。

it has some significance for designing and testing of traveling wave piezoelectric motors.

这对行波压电电动机的设计和测试具有很重要的意义。

the traveling wave fault location has high reliability accuracy and anti-disturbance capability , and it also immunes from the fault resistance and the neutral grounding modes.

行波测距法具有较高的可靠性和精度，抗干扰能力强，且不受故障电阻及系统运行方式的影响。

traveling wave ultrasonic motor is a new type of actuator driven by friction.

行波超声马达是一种靠摩擦力直接驱动的新型驱动器。

influence of fault type, fault resistance, line length and fault inception angle on fault location result using current traveling wave has been studied by using emtp.

利用emtp仿真工具，建立简单双端系统，研究了故障位置、故障类型、接地电阻和不同长度线路对电流行波测距仿真结果的影响。

the second order, #5001, is worth ＄10.1 million and covers band 5/6 output traveling wave tubes (otwt) used on the ea-6b aircraft an/alq-99 tactical jamming system.

第2个合同价值1010万美元，提供ea-6b飞机an/alq-99战术干扰系统使用的波段5/6输出量行波管。

the steady solution and its stability of nonlinear schrdinger equation(nlse) are studied by means of traveling wave transformation and bifurcation theory.

用行波变换方法和分叉理论研究里非线性薛定谔方程的定常解和定常解的稳定性。

according to the company, the large and heavy vacuum tube-based traveling wave tube amplifiers cannot be effectively replaced by gaas transistors because they a much lower breakdown voltage

根据公司的消息，真空管将不会被砷化镓晶体管取代。

this paper develops the practical traveling wave protection system of hvdc transmission lines based on pscad/emtdc.

本文在pscad/emtdc平台上建立了实用的直流输电线路行波保护系统模型。

in this article, dielectric photonic crystals (phc) with finite dimensions and exposed in air is analyzed for its potential value in traveling wave tubes (twts).

针对光子晶体在行波管中的应用，对有限开敞介质光子晶体的模式和带结构进行了分析和计算。

this paper describes the composition of an l - band traveling wave feeding network, and focuses on the design and implementation of its critical component—directional coupler.

介绍了一种l频段行波馈电网络的组成，着重叙述馈电网络中关键部件定向耦合器的设计和实现。