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.
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.
用方程(4)可简单推导相速度和周期的关系。
Equation (4) permits a simple deduction of the relation between the phase velocity and the period.
笔者重点对瞬态瑞利波相速度的算法进行了研究。
The algorithm for solving phase velocity of transient Reyleigh wave was emphatically studied.
在这样的纵向电场作用下，等离子体波的相速接近光速。
The phase velocity of the plasma wave approaches the velocity of light due to the action of the longitudinal electric field.
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 precision of phase velocity calculation can be improved by the frequency zooming and the signal cutting techniques.
空间自相关法；瑞雷波相速度频散；圆形排列；微震勘探法。
Spatial autocorrelation method; Phase velocity dispersion of Rayleigh wave; Circular array; Microtremor survey method.
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 evolution equations of wavelength, phase velocity, propagation direction and amplitude of the AGW packet are derived.
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。
The numerical result shows that the power flow direction is reverse to that of phase velocity.
对轴上光场的相速度和群速度以及电子能量增益等物理特征作了讨论。
Some physical characteristics, such as phase and group velocities of the axial optical field, and energy gain of electrons etc.
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。
The amplitude taper and phase correction are obtained by redistributing energy and changing phase velocity in different region inside the horn respectively.
尤其在颗粒相和气相速度场以及其相互作用规律研究上缺乏理想的测量手段。
Especially there are few perfect measurement methods to be used in the study of particle, gas flow field and their reciprocity.
表面惯性重力波和惯性重力内波的相速公式都是这个更普遍的频率方程的特殊情况。
The well-known phase speed formulas of surface inertial gravity wave and internal shear inertial gravity wave are the special cases of this frequency equation.
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。
Then the possibility of larger phase velocity and group velocity than light speed in dispersive medium is discussed.
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 paper studies the concepts of phase velocity and group velocity on electromagnetic wave propagation and discusses the relation between signal conveyance and energy conveyance.
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。
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.
在文中研究的烟气速度范围内，整体上气相速度的改变对液滴完全蒸发时间的影响很小。
In the range of flue gas velocity considered, the varying of flue gas velocity has a very small influence on the droplet's life time.
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 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.
然而，波的相速依赖于等离子体频率和结构尺寸，并且非常慢的波可以存在于非常小尺寸的波导中。
However, phase speed depends on plasma frequency and structure dimension, and very slow waves can exist in very small sized waveguide.
基于涂层结构中表面波的频散方程，提出了一种从实测的相速度频散数据计算材料参数的反演方法。
Based on the dispersive equation of surface waves in the coated materials, an inverse method was proposed for calculating the coating properties from the measured dispersive data of phase velocities.
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 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.
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。
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.
给出了轴上光场的相速度和群速度、加速电位及电子能量增益等的解析表达式，并作了数值计算和分析。
The analytical expressions for the phase and group velocities of the axial optical field, accelerating potential and energy gain etc. are derived and are used to make numerical analysis.
对制备色谱的洗脱方式、洗脱剂组成、浓度、洗脱速度等参数进行优化，提出并应用了流动相速度梯度洗脱方法。
The elution mode, composition of the mobile phase, content of the organic acid and the flow-rate of the mobile phase were optimized and thus a new flow rate gradient was proposed.
方法，研究时空变化风场中声重波波包的演变过程。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。
B. method, we have investigated the evolution process of an AGW packet in a spatially and temporally varying wind.
利用二维快速傅立叶变换的时频分析方法，对有限元计算得到的时域信号进行了分离，得到了各个模式超声波的相速度色散曲线。
The two-dimensional fast Fourier transform (2D-FFT) method has been used to analyze the ultrasonic signals where different wave modes overlaid in the time domain.
结果表明，当相关长度增大时，相速度的过渡带向低频方向移动，衰减的弛豫峰随相关长度的增大向低频方向移动，且幅度逐渐减小。
The results show that the velocity and the relaxation peak of the attenuation moved to low frequencies, and the amplitude of the attenuation decreases, as the correlation length increases.
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。
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.
在相同供油量情况下，新供油方式形成环状流需要的入口气相速度低，且气速增大时一般不会形成夹带液滴，能够实现较好的环状流流型。
Results show that with the same oil amount, the new oil supply style needs a lower gas velocity in the inlet to shape the annular flow, and the oil drops will not appear in air flow.
在相同供油量情况下，新供油方式形成环状流需要的入口气相速度低，且气速增大时一般不会形成夹带液滴，能够实现较好的环状流流型。
Results show that with the same oil amount, the new oil supply style needs a lower gas velocity in the inlet to shape the annular flow, and the oil drops will not appear in air flow.
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