When a vibrating source of waves is approaching an observer, the frequency observed is higher than the frequency emitted by is lower than that emitted.
当振动着的波源逐渐靠近观测者时，测量到的频率比从波源发出的频率高。
The source of this paradox is electronic anti-noise which creates sound waves to cancel out unwanted noise, such as rattles, blare, etc.
这种矛盾的根源是电子抗噪，它会产生声波来抵消不想要的噪音，如响尾音、刺耳的鸣响等。
The Korean scientists, however, want to harness a different kind of power source: sound waves.
然而，韩国科学家想驾驭一种不同类型的能量源，那就是声波。
Gravitational waves are fluctuations in the curvature of space and time which propagate through the universe as gravitational waves — outward from its source.
时间与空间的弯曲贯穿整个宇宙，其中的起伏就是重力波，它自起源处向外散发。
Ambient radio waves have largely been ignored as a potential power source until recently, because the power of a broadcast radio signal rapidly decreases with distance.
直到最近环境无线电波才格外受到重视成为一种潜在的电源，这是因为广播电台的无线电信号发电随着距离的增加而锐减。
This paper presents a method of using self made vibration source and vibrometer to excitc surface waves (ripples) to produce interference.
介绍了用自制的振源、振子来激发表面波（涟波）产生干涉，从而测出液体的表面张力系数的方法。
Higher order waves generated by a moving source in a two-layer inviscid, incompressible fluid of finite depth with small density difference were studied.
研究了运动点源在无粘、不可压且具有小密度差的两层有限深流体中生成的高阶波动。
The expression for exciting with a laser line source is derived through analyzing the principle of exciting surface ultrasonic waves by a laser point source.
通过对点光源激励声表面波的机理进行分析，推导出线光源激励的表达式。
A laser generation and optical difference detection method of surface acoustic waves (SAW) is used to study the influence of laser source on SAW.
利用激光激发声表面波及光差分技术研究激光源对声表面波的影响。
In this paper, the method and theory relevant to inversion for source parameters by using long-period Rayleigh waves on IDA accelerograms (International Deployment of Accelerograph) are discussed.
本文讨论了利用国际部署加速度仪台网(IDA)的超长周期瑞雷波记录，反演震源参数的有关理论和方法。
Make waves with a dripping faucet, audio speaker, or laser! Add a second source or a pair of slits to create an interference pattern.
通过滴水的龙头，扬声器或镭射来产生波！增加第二来源或者两条缝，可以产生干涉形式。
The motion of waves conresponds to contraction of cold source and expand of heat source.
换句话说，几率波在冷源区是收缩的，在热源区是扩散的。
But in regions of lower resistivity HFEM results have been disappointing due to severe attenuation of source waves by the medium.
在低阻区，高频电磁方法的结果一直是令人失望的，其原因是这种介质使信号严重衰减。
The same principle also applies to light waves, which get longer if the source of the light is moving through space away from us.
同样的原理也可以描述光波，假如光源穿越空间而远离我们，光波也会变长。
The source mechanism, source stress field and source fault for the Chengjiang earthquake of M5.2 has been analyzed by the data of seismic waves.
利用地震波资料对澄江5 2级地震序列的震源机制、震源应力场和震源断层作了分析研究。
Sound waves travel outward like balloons expanding around their source. The sound's power is distributed on the surface of the wave which increases with the square of the distance from its source.
声波的扩散就好比气球的膨胀，声波从声源向四周扩散，声音的能量也随着声波四散开来。
Rankine source method (constant panel) is developed to calculate the action of ship generated waves on the vertical cylinder in finite depth water.
本文的第三部分内容为计算船行波对水中直立圆柱的作用（忽略圆柱产生的绕射势对船体的影响）。
In this paper, under the assumption of point source propagation of waves an approach of 3-d dynamic analysis of seismic response of embankment DAMS is proposed.
本文利用波的点源传播假定，建议了一种计算堤坝地震反应的三维动力分析方法。
The properties of elastic waves excited from a two-dimensional (2d) point source propagation in 2d fractured rocks were in.
应用边界元法模拟了两种点源产生的弹性波在二维裂缝(岩石)中的传播特性。
Given the velocity ratio of S-to P-waves, the depth of reflector and the offset, the horizontal distance between source and the converting point can be determined by solving a quartic equation.
如果我们已知介质中横波与纵波速度的比值、水平界面的埋藏深度和炮检距，炮点到共转换点的水平距离就可以通过解一个四次方程求出。
With the most use of the electronic equipment, all kinds of elctromagnetic waves exist in our enviroment, and the elctromagnetic waves are the unseen source of the EMI.
随着电气、电子设备的大量使用，我们周围的环境中充满了各种频率的电磁波，这些电磁波对于电子设备而言都是潜在的干扰源。
When an earthquake occurs, it releases energy in the form of seismic waves that radiate from the earthquake source in all directions.
当一个地震发生时，它以从震源向各个方向发生的地震波的形式释放能量。
When an earthquake occurs, it releases energy in the form of seismic waves that radiate from the earthquake source in all directions.
当一个地震发生时，它以从震源向各个方向发生的地震波的形式释放能量。
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