And the phase velocity of fast wave will decrease exponentially with frequency.
快纵波的相速度随频率的增大以指数形式减小。
And the phase velocity of fast wave will decrease exponentially with frequency.
相速度随频率的增大以指数形式减小。
The algorithm for solving phase velocity of transient Reyleigh wave was emphatically studied.
笔者重点对瞬态瑞利波相速度的算法进行了研究。
The numerical result shows that the power flow direction is reverse to that of phase velocity.
数值结果显示了在这种波导中能量的流向和相速度具有相反方向。
Equation (4) permits a simple deduction of the relation between the phase velocity and the period.
用方程(4)可简单推导相速度和周期的关系。
Disturbance degree of the apparent phase velocity increases with decrease of frequency until a maximum one occurs.
表观相速度扰动程度随频率减小而增加，直至出现大扰动。
Then the possibility of larger phase velocity and group velocity than light speed in dispersive medium is discussed.
然后从色散介质中相速度与群速度的关系，讨论了相速度和群速度超光速的可能性。
Spatial autocorrelation method; Phase velocity dispersion of Rayleigh wave; Circular array; Microtremor survey method.
空间自相关法；瑞雷波相速度频散；圆形排列；微震勘探法。
The precision of phase velocity calculation can be improved by the frequency zooming and the signal cutting techniques.
通过细化技术及干扰信号切除方法可提高相速度计算精度。
The evolution equations of wavelength, phase velocity, propagation direction and amplitude of the AGW packet are derived.
文中导出了声重波波长、相速、传播方向以及振幅的演变方程。
The phase velocity of the plasma wave approaches the velocity of light due to the action of the longitudinal electric field.
在这样的纵向电场作用下，等离子体波的相速接近光速。
Two-phase velocity fields in a round turbulent jet with Reynolds number 8500 were measured by phase Doppler Particle Analyzer (PDPA).
采用相多普勒颗粒分析仪(PDPA)测量了雷诺数为8500的两相圆湍射流速度场，研究了两种大粒径颗粒对湍流的调制作用。
It is a new branch that the artificial transmission line is introduced into optic electronic modulator, realizing phase velocity matched.
把人造传输线的观点引入电光调制器，实现相速度的匹配，是近年来才兴起的一个新的分支。
The results show that both the inter-phase velocity slip and temperature slip always exist in the whole two-phase region, but are not obvious.
结果显示：气液两相间的速度滑移和温度滑移在整个两相区一直存在，但在绝大部分区域内，这种非平衡性并不显著；
Finally the characteristics of the phase velocity method are dealt with briefly and some proposals to improve the experiment are also suggested.
文末提出了此方法的某些特点，以及改进实验的设想。
Affected by higher Rayleigh wave modes in the surface wave field, the effective phase velocity obtained by spectral analysis of surface waves SASW.
由分层介质表面两不同点响应互谱分析(SASW)得到的有效相速度并不对应于面波基阶模态相速度，它与波场中高阶模态能量分配比例有关。
Three experimental techniques were used: the simple optical probing, the dark field imaging and the visualization of inverse phase velocity surfaces.
所采用的实验方法有简单光探针技术，暗场法以及倒速度图显示等三种。
Based on the calculated liquid and solid phase velocity fields, the numerical simulation of silt abrasion on runner blade surfaces has been carried out.
根据液相和固相三维流速场的计算结果数值模拟了转轮叶片面的泥沙磨损。
The amplitude taper and phase correction are obtained by redistributing energy and changing phase velocity in different region inside the horn respectively.
在喇叭内部不同区域中重新分配能量和改变相速来获得幅度锥削和相位校正。
Mechanism of disturbance of apparent phase velocity is analyzed from distribution of energies of Rayleigh waves and the reflected body waves in the responses.
根据表面质点响应中瑞利波和反射体波能量分配分析表观相速度扰动机制，讨论振源、测点、洞穴三者相对位置及频率对表面波表观相速度影响。
The results indicate that influenced by higher modes and the source, the effective phase velocity is related to frequency as well as the distance from the source.
结果显示在高模态及振源影响下表面波有效相速度不仅与频率有关，而且与传播距离有关。
The effect of electric field strength and two phase velocity on mass transfer characteristics in the separation process was studied in an electro-extraction equipment.
在自行设计的连续电泳萃取池内实验研究了电场强度、两相流速等因素对丁醇萃取率及传质通量的影响。
The flow resistance of foam is affected by those parameters such as surfactant concentration, oil saturation, temperature, permeability, water and gas phase velocity, etc.
泡沫的流动阻力受泡沫剂浓度、温度、油饱和度、渗透率以及水相和气相达西流速的影响。
The paper studies the concepts of phase velocity and group velocity on electromagnetic wave propagation and discusses the relation between signal conveyance and energy conveyance.
文章研究了电磁波传播的群速与相速概念，论证了信号传送与能量传递的必然联系。
The studying results show that the classical elastic wave equation of spherical wave is only true for fixed amplitude phase and described only kinematic equation of phase velocity.
研究揭示经典的球面波波动方程只对固定振幅相成立，即只描述了相的运动方程，其波速为相速度。
The conversion mechanisms of a chemical signal (gas concentration) into a physical signal (SAW phase velocity change) in SAW gas sensors and the way to separate them are discussed.
讨论了在SAW气体的传感器中把化学信号(气体浓度)转换成物理信号(SAW相速度变化)的机制以及将它们彼此分离开来的方法。
Based on the algorithm, the value of transient Reyleigh wave phase velocity is closer to true wave velocity, so the resolving rate and the definition of the phase velocity are improved.
根据以上算法求得的相速度更接近瑞利波真速度，从而提高了相速度的分辨率和精确度。
It is shown that the variations of wavelength, phase velocity and propagation direction depend on the vertical structure of the wind and also on the direction of the wave with respect to the wind.
结果表明，沿群路径上波长、相速和传播方向的变化取决于风场的垂直结构以及波风之间的相对方位。
Contrast, spatial frequency, presentation time, moving velocity and phase reversal frequency of each grating are controlled independently.
每组光栅的对比度、空间频率、显示时间，移动速度和反相频率能单独控制。
Laser phase Doppler anemometry (PDA) technology can be used to measure moving particle's velocity, size and relative refractive index simultaneously.
激光相位多普勒(PDA)能够同时测量粒子的速度、大小和相对折射率。
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