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.
给出了圆柱管的一些参数对相速度和衰减的影响。
Then, the influences of some parameters on phase speed and attenuation are analyzed.
表观相速度扰动程度随频率减小而增加，直至出现大扰动。
Disturbance degree of the apparent phase velocity increases with decrease of frequency until a maximum one occurs.
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.
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.
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.
然后连续利用多元函数级数展开，导出群角表示的相速度和群速度近似公式。
Then series expansions of multi-variable functions are applied to the derived approximations in terms of phase angles to generate the approximations in terms of group angles.
利用此法可以求得包括两相速度、颗粒容积宁和压力等沿管道的分布的流动参数。
The flow parameters, included distributions of two phase velocities, particle volume fraction and the pressure along the pipe etc. , can been obtained by using this method.
对湿模式和干模式进行的对比实验表明，两者重力波传播的相速度有明显的差别。
The results of numerical experiments of wet model are presented and compared with that of dry model.
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.
随着弹性模量的变化，兰姆波相速度和表面位移场与弹性模量之间有一定的对应关系。
There are the relationship between elastic modulus and phase - speed and surface - displacement of Lamb wave.
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.
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。
It is a new branch that the artificial transmission line is introduced into optic electronic modulator, realizing phase velocity matched.
在以驱动波相速度运动的坐标系中，用微扰法讨论。在正弦波驱动下的非线性漂移波的分波方程。
The nonlinear drift-wave equation driven by a sinusoidal wave is discussed in a coordinate system moving in the driving phase speed.
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.
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.
可以针对ati地区的地质情况，给出体波群速度和相速度变化图案，为进一步的理论研究提供便捷。
For complex structural geology of ATI areas, this research can provide the patterns of body-wave group-velocities and phase-velocities to benefit the theoretical research.
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.
其结果表明．波动-CISK在减慢激发波的位相速度以接近观测到的热带ISO的移速过程中起主要作用；
The results showed that among the introduced dynamical processes the wave-CISK plays a major role in reducing phase speed of the wave to be closer to the observed tropical ISO.
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.
坐位状态VOKN慢相速度有明显的方向性不对称，敏感组VOKN方向性不对称有显著差异（P＜0．05）。
The directional asymmetry of VOKN obviously exisists in upright subjects. Significant differences of the up-down asymmetry of VOKN among the Iow tolerance group were observed(P<0.05).
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.
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.
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