Phenomenon of the change in velocity of propagation of monochromatic radiations in a medium as a function of the frequency of these radiations.
在介质中传播的单色光改变其传输速度的现象，并由该辐射的频率所决定的。
Meanwhile, the influences of pipeline internal pressure, wall thickness, crack arrest length and initial crack velocity on the crack driving force (crack propagation) are further studied.
进而分析了管道内压、壁厚、裂纹止裂长度和初始裂纹速度对裂纹驱动力(也即裂纹扩展)的影响。
The results show that it is essential to consider the factor of heat propagation velocity.
结果表明在某些场合，考虑热量传播速度这一因素是非常必要的。
When analyzing the propagation of high power microwave (HPM) in atmosphere, the propagation velocity in non ionized and ionized mixture atmosphere is needed.
在计算高功率微波（HPM）在大气层中传播时，需要知道非电离与电离混合大气层中电波传播速度。
We reported the main progress made in China in recent years of the study of ultrasonic tissue characterization-propagation velocity, attenuation, scattering and nonlinearity parameter, etc.
本文报道了近年来我国在生物组织超声特性——传播速度、衰减、吸收、反射、散射和非线性声参量方面的研究进展情况。
Based on the mechanics of wave, the expression of water wave propagation velocity under the action of gravity is deduced and the effect of surface tension on small wave is analyzed.
本文根据波动理论推导出在重力作用下波的传播速度表达式，分析了微小波动中表面张力的作用。
This paper introduced a special instrument for measuring the propagation velocity distribution of com-pound active potential using collision method.
本文介绍了一种用碰撞法测量复合动作电位传播速度分布专用仪器。
Objective To evaluate the feasibility and accuracy of color M-mode Doppler flow propagation velocity (FPV) in assessment of the severity of aortic regurgitation (AR).
目的观察m -型彩色多普勒超声测定主动脉瓣返流(AR)的血流传播速度(FPV)估测AR程度的可行性及准确性。
With the help of model techniques, we can determine seismic velocity in porous media by accounting for viscous fluid effects on wave propagation.
借助模型技术，可以利用孔隙介质中粘滞流体对地震波传播速度的影响预测地震波传播速度，降低反演结果的不确定性。
Based on the limited momentum propagation velocity, this paper presents the solution of the transient momentum equation by Laplace transform. The distribution functions of velocity and eddy are given.
在考虑瞬态过程中动量扩散速度基础上，用拉普拉斯变换法对无限长平板突然起动瞬态动量定解方程进行了求解，并按涡量定义求出涡量分布函数。
The propagation velocity of elastic wave with different frequencies in same medium is various, which is called dispersive problem of frequency.
相同介质中不同频率的弹性波传播速度是有差异的，即频散问题。
The fatigue properties were researched and found that the crack propagation velocity and the decline of rigidity were related to the maximum cycle stress.
通过对其疲劳性能的实验研究，发现裂纹扩展速率的大小及刚度的下降与加载的最大循环应力密切相关的规律。
The results show that the propagation speed of the wave is not equal to the speed of energy flux, but nearly equal to the real part of the complex group velocity.
结果表明，波的传播速度并不等于能流速度，而与复群速度的实部近似相等。
The propagation velocity of shock wave agrees with the result of the model analysis on a "effective gas".
激波传播速度与基于“等效气体”模型计算值相符。
The propagation field and velocity of positive streamer are investigated under different pressures and humidity conditions through a three-electrode system.
为了解流注传播电场测量中大气参数的影响，利用“三电极系统”研究了不同气压湿度条件下正流注的传播电场和传播速度。
Combing the wave field snapshot with the corresponding velocity section proves to be important in the observing of wave propagation.
将波场快照与速度剖面相结合，可以更好地观测到波的传播过程。
According to the properties of wave propagation in multiphase medium, the theoretical formulas for calculating the P-wave and S-wave velocity are deduced.
本文基于多相复合介质的波动传播特性，导出介质内纵、横波速的理论计算公式。
The variation of combustion velocity, fired gas temperature and flame propagation speed, when the press, excess air ratio and ignition timing changed, was calculated by this quasi-dimensional model.
此模型能根据实测的燃烧压力曲线计算出层流燃烧速度、已燃气火焰温度及火焰传播速度等参数随压力、当量比、发动机转速、点火提前角的变化规律。
The network becomes the many people head expression outlet for choosing by degrees, quick its propagation velocity, spread wide sphere, let to take charge of difficult up add difficult.
网络逐渐成为很多人首选的表达渠道，其传播速度之快、传播范围之广，让监管难上加难。
A successive approximation method is suggested without value limit of wave velocity. The formulas for calculating the initial propagation velocity of reverse plastic loading boundary are also given.
建议了一个不受波速值限制的逐步近似法，并给出反向塑性加载边界传播速度的计算式。
Existing methods for travelling wave fault location don't combine the arrival time of travel-ling wave with the propagation velocity properly, which leads to poor location accuracy.
现有行波测距法基本上都没有把由该方法所确定的行波到达时间与故障定位用行波传播速度很好地结合起来，导致定位精度不理想。
Stress wave propagation equations that incident wave and reflection wave are condition vectors are derived from three discrete forms as well as the characteristic matrix of the force and the velocity.
推导了以顺波、逆波为状态向量的应力波传播方程和杆形部件的作用力、速度传播的特征矩阵；
The radio wave propagation velocity is slowed and the ray producing bend but to the asymmetry of the atmospheric medium, the refraction error is produced.
由于空中大气介质的不均匀性使得电波传播速度减慢射线产生弯曲，从而产生折射误差。
It was believed that the primary reason of the second propagation of Cyclops was the low filtering velocity and the long retention time in the filters.
指出滤池滞水区停留时间长、流速低是造成剑水蚤二次繁殖的主要原因。
For the present experimental conditions, it is found that the flame propagation velocity is a weak function of dust concentration in cornstarch dust clouds.
在所考察的实验条件下，粉尘浓度对于玉米粉尘火焰传播速度的影响不大。
The average fracture propagation velocity is estimated with a series of crack gauges glued on the specimen.
裂纹传播平均速度由黏接在试样上的一系列裂缝计测量得到。
The observed velocity of the vehicle start wave propagation was obtained from the survey data directly and the corresponding derived propagation characteristics of the vehicle start wave.
按照起动波传播特性，由实际调查数据计算了波速观测值。
When the shock wave is formed, the propagation velocity of the two peak values of explosion wave, become nearer and nearer, that is reciprocally authenticated with the explosion propagation theory.
形成激波后，爆炸波两峰值往下游传播越来越靠近，测试结果与爆炸传播理论是相互验证的。
The fluid flowing boundary extends outwards continuously is the feature of pressure propagation with low velocity Non Darcy percolation.
流体流动边界不断向外扩展是低速非达西渗流压力波传播的特点。
The fluid flowing boundary extends outwards continuously is the feature of pressure propagation with low velocity Non Darcy percolation.
流体流动边界不断向外扩展是低速非达西渗流压力波传播的特点。
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