Unlike an ocean wave, a wavefront or surface of constant phase is unobservable and undetectable.
和海浪不同，波阵面或固定相平面是不能观测和不能发现的。
This is a constant - amplitude wave which is essentially the same on the conjugate image plane.
这是一个振幅恒定的波，在共轭的象平面上也是如此。
Suppose the speakers both emit a pure sinusoidal sound wave of constant frequency.
假定两个扬声器都发射恒定频率的纯正弦声波。
Propagation characteristic of UHF radio wave in rectangle, circle and arched tunnels is studied in this paper and the computing equation for attenuation constant is deduced.
研究UHF频段的无线电波在矩形、圆形和拱形隧道中的传播特性，推导了衰减常数的计算公式。
In theory, the influence of the exponential DC component on the fundamental wave component with random decay time constant can be completely eliminated with the algorithm.
理论上新算法可以消除任意衰减时间常数的直流分量对所求各次谐波分量的影响。
When the integral constant is zero, the existence of smooth solitary wave solutions, uncountably infinite, many smooth periodic wave solutions, and kink and anti-kink wave solutions are proved.
在积分常数为零的条件下，证明了该方程存在光滑孤立波解、不可数无穷多光滑周期波解、扭结波和反扭结波解。
The important parameters for the wave absorption effects are electromagnetic loss factor, complex dielectric constant, complex magnetic conductivity.
评价吸波效能的主要参数是损耗因子、复介电常数、复磁导率。
It introduces a kind of powerful complementary DC and constant voltage power device by using the independent excitation and high frequency PWM wave clipper.
介绍一种利用它激式高频pwm斩波技术完成的大功率直流稳压电源装置。
This paper presents the design of thyristor triggering circuit for a variable speed constant frequency (VSCF) wave energy electricity generating system.
介绍了变速恒频波浪能发电系统的晶闸管触发电路设计。
This paper mainly discusses the control and protection system for the 20kw VSCF (Variable Speed Constant Frequency) Wave Power Electric Station.
本文着重介绍了20千瓦变速恒频波力发电系统的控制功能和保护体系。
As an example, the operation frequency of TT&C and data transmission(TTC&DT) and the attenuation constant of electromagnetic wave through the blackout zone are estimated.
作为一次练习，估算了测控通信系统的工作频率、电波穿过“黑障”区的衰减常数；
Unlike in a pure liquid in which the pressure wave velocity is constant, the wave velocity in gas-liquid mixtures varies with pressure.
在混合物中压力波速不象在纯液体中波速那样是恒定的，汽液混合物中的波速随压力变化。
Besides, constant current and chopping and triangle - wave driving method were adopted to improve the toque performance.
采用恒流技术结合三角波形的高性能驱动方式，改善了电机的运行性能，并实际证实了该控制技术的可行性。
The presence of love is constant and strong within each energy wave as the anchoring of energy in this way each year is to build the presence of love on the Earth.
随着能量的锚定，在每个能量波内爱的临在是持续和强大的，以这种方式每年将要建立爱在地球上的临在。
The conversion efficiency between the fundamental wave and the th emission is roughly constant over the length of the plasma channels.
实验研究发现三次谐波的转换效率在通道范围内基本保持不变。
Other characteristics, such as frequency, wave shape, and phase balance are seldom recognized by the consumers but are given constant attention by the electric power utility engineers.
而其它方面的特性，如频率、电压波形、各相平衡则很少被用户认识到，但这恰恰受到电力部门工程师们的时刻关注。
This paper derived the relations between polarization dispersion and wave length from the dielectric constant perturbation theory.
本文从介电常数微扰理论得到极化色散与波长的关系。
When 1/4 wave plate 2 and 3 are removed, the ambipolar diffusion constant and mobility of electron charge can be measured.
当去除1/4波片2和3时，则能够测量电子电荷的双极扩散常数和迁移率。
A constant amplitude triangular-wave generator is shown in Figure 27. This circuit provides a variable frequency triangular wave whose amplitude is independent of frequency.
图27所示电路是一个幅值固定不变的三角波发生器。该电路产生频率可变的三角波信号，但其幅值与频率无关。
In the case of constant wind, the simulated results can accurately reproduce the spectrum and wave growth relation on which the proposed model is based.
在常风速情形中，模拟结果能精确地化为建立模拟所根据的谱和风浪成长关系。
As the speed is constant, when the frequency is increased, the wave length will.
因为速度不变，当频率增加时，波长就会减少。
The attenuation factor of longitudinal wave was changing linearly, whereas the attenuation factor of the slow shear wave kept nearly constant with a low frequency on the exploration seismic band.
纵波的衰减系数在地震频带内基本上呈线性变化，而横波的衰减系数在地震频带内除低频外基本保持稳定。
The effect of spring mass on oscillation frequency and elastic constant is discussed by solving the wave equation.
通过求解弹簧中纵波的波动方程，讨论了弹簧质量对振子的振动频率及弹簧劲度系数的影响。
Meanwhile, the driver had the functions of constant current chopper, index movements frequency and sine wave equal-breadth even subdivision.
驱动器具有恒流斩波、指数升降频和正弦波等幅均匀细分的功能。
This is a constant-amplitude wave which is essentially the same on the conjugate image plane.
这是一个振幅恒定的波，在共轭的象平面上也是如此。
With constant limited force and energy, and let in the electromagnetic wave of than light material volume, quality of material more small, the speed is faster than the speed.
以恒定有限的力与能量，任凭于比光的电磁波物质体积、质量更小的物质，则其速度就是超光速的。
The transmission of the earth wave is stable, hardly influenced by climate and its channel parameter does not change with time basically, it is Constant Parameter Channel.
地波传播受天气的影响较小，比较稳定，信道参数基本上不随时间的变化而变化，是恒参信道。
A new method is presented in this paper, which can accurately measure the multi-targets' real-time parameters in high precision measurement radar with constant wave (CW) system.
本文采用连续波体制给出了一种高精度测量雷达中多目标参数实时精测的方法。
This paper is to display existence and its conditions to a surface acoustic wave propogating along surface of a half-body of piezoelectric ceramics with a rotation of constant angular velocity.
对转动半无限压电陶瓷体的表面声波给出了存在性证明及其条件。
Then approximate wave impedance is computed after background velocity has been obtained by making constant-velocity scanning.
并在常速扫描取得背景速度的基础上计算近似波阻抗。
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