Because P and S waves travel at different but fairly constant speeds, the interval between their arrivals increases in proportion to the distance from the earthquake focus, or initial rupture point.
由于P波和S 波以不同但相当恒定的速度传播，它们到达的间隔与到震源或初始破裂点的距离成比例地增加。
Last go-round, M82's gravity likely raised density waves rippling around M81, resulting in the richness of M81's spiral arms.
最近一个周期中，M82的重力增强了M81周围密度波的脉动，导致M81的旋臂更浓密。
Random transform has been widely used in seismic exploration, for example, suppression of multiple, separation of P- and S-waves, seismic migration and inversion etc.
拉冬变换在地震勘探领域有广泛的应用，如压制多次波、纵横波分离、地震偏移及反演等。
Previous studies show that both dynamite borehole shots and vertical vibrations from controllable seismic sources at the surface will produce relatively strong pure P-waves and weaker pure S-waves.
已有的研究表明，炸药震源在井下激发、可控震源在地面垂向振动，均会产生较强的纯纵波和一定强度的纯横波；泊松比差别较大的分界面有利于形成较强的透射转换横波。
Using MTS Ultrasonic Measurement System, we studied the influences of water of saturation and pore pressure on velocities of compressional (P) and shear (S) waves in exposure rock specimens.
我们用MTS的超声波测试系统研究了地表岩样饱和水及孔隙压力对纵横波速度的影响。
Both P and S waves refract or reflect at points where layers of differing physical properties meet.
和S波都在具有不同物理性质的地层相遇处折射或者反射。
Climate scientists say Earth? S climate also is changing thanks to man? Made global warming, bringing extreme weather, such as heat waves and flooding.
气象科学家说地球的气候也在发生变化。人为造成的全球变暖带来了极端的天气，使得热浪肆虐，洪水泛滥。
And researches found that P waves traveled through both liquids and solids while s waves traveled only through solid matter.
研究发现P波能在液体和固体中传播，然而S波只能在固体介质中传播。
And researchers found that P waves travel through both liquids and solids while s waves travel only through solid matter.
研究者发现P波可以同时穿过液体和固体，但是S波只能穿透固体。
And research found that P waves travel through both liquids and solids, while s waves only travel solid matter.
研究发现P波可以同时穿过液体和固体，而S波只穿过固体物质。
But, the converted waves, PS waves, containing effective information of incident compressed (p) waves, can create converted s waves.
转换波(ps)含有有效入射P波信息，从中能获得转换S波。
Sri Lankan wildlife officials have said the giant waves that killed over 24,000 people along the Indian Ocean island "s coast seemingly missed wild beasts, with no dead animals found."
斯里兰卡负责野生动物的官员表示，巨浪席卷印度洋海岛沿岸，淹死了两万四千多人，但野生动物似乎都幸免于难，目前尚未发现一具动物的尸体。
The theoretical results show that for TM waves there exist frequency passband (s) and stopband (s) which can be switched into each other by varying the power.
理论分析表明，非线性TM表面波存在频率通带和禁带，通过调节导波功率可以实现通带和禁带之间的转换。
Efficient and accurate estimation of mat-like VLFS s hydroelastic responses in waves is very important for the design.
如何快速而精确地估计箱式超大型浮体在波浪中的水弹性响应是设计中需要解决的一个重要问题。
Radio waves also travel at the speed of light, and assuming such an automatic messenger picked up our first broadcasts of the 1920's, the message to its home planet is barely halfway there.
无线电波传播速度同光速一样，假设这种信使接收到我们于本世纪20年代的初次广播，则送往其母行星的信息现在仅走过一半路程。
We also obtain the expression for the transmissive light waves from the Green 's-function integral in the case of Kirchhoff's approximation.
同时，由透射光场的格林函数积分得出了基尔霍夫近似下光场的表达式。
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。
We compared site response from the S wave inversion and those from other techniques, such as traditional direct spectral ratios of S waves and receiver function of S waves.
利用唐山近场强震记录对如何分析场地反应进行研究，分析比较了多种方法：线性反演法、传统的谱比法以及接收函数法。
It is shown that so long as the restrained gas exists, there are two P waves and one S wave, even though the fluid phase is incompressible.
结果表明，甚至当液相为不可压缩时，由于束缚空气的存在，饱水土体中亦存在着两种P波。
It is shown that so long as the restrained gas exists, there are two P waves and one S wave, even though the fluid phase is incompressible.
结果表明，甚至当液相为不可压缩时，由于束缚空气的存在，饱水土体中亦存在着两种P波。
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