地震波

Geophysicist Xiaodong Song of the University of Illinois at Urbana-Champaign and his colleagues studied seismic waves from doublets--pairs of earthquakes from the same place but occurring at different times.

诺伊大学香槟分校的地球物理学家宋晓东和他的同事们研究了多组在同一地点不同时间发生的两次地震的地震波。

Four main formations of loop bedding in Jiyang sub-basin were upper layers fall down in the process of earthquake, tautening distortion due to earthquake, the frication of earthquake-related surface of fault and the effect of redox and diffuse other formations of loop bedding comprise the effect of earthquake wave, the effect coming from circumrotate of globosity rotation, snowball function, cementation intermittent, the effect of biology, and so on.

综合分析认为震动塌落、震动拉伸变形、地震断裂面的摩擦作用、氧化还原反应和扩散作用是环状层理的主要成因，前三种成因的环状层理往往与其他震成构造伴生，可作为震积岩的良好标志。环状层理的其他成因还包括：地震波传播方式的影响、地球自转产生的涡旋的影响、"滚雪球"效应、间歇胶结作用以及生物成因等。

This is because the seismic waves from ground to ground, the first wave arrived because.

这是因为地震波从地下向地面传来，纵波首先到达的缘故。

Phase and group velocity are the important parameters for researching seismic wave propagation and describing the media property, and they are key contents in theory of elastic wave propagation and play a role in theory and application.

相速度和群速度是研究地震波传播规律和描述介质特性的重要参数，是弹性波传播理论中的核心内容，在理论研究和实际应用中有重要作用。

Also under a series of harmonic loadings and earthquake histories, the joint opening behavior and acceleration response of the arch dam model with reinforcement were tested.

通过系列谐波和地震波试验，以及拱坝分析有限元程序ADAP-88所做的计算对比，验证了ADAP-88程序中的三维非线性接缝模型的合理性。

Under a series of harmonic and earthquake wave loadings,the joint opening behaviors and acceleration responses of the arch dam model were tested.

通过振动台输入谐波和地震波对模型拱坝进行动力试验，并运用拱坝非线性分析有限元程序ADAP - 88来进行计算比较，试验结果验证了数值模型的可行性，揭示了带横缝拱坝在地震荷载作用下的反应规律。

The classical elastic theory is precisely based on the Hooke's law, and issuitable to the depicting and describing of seismic wave propagation in the elasticmedia. But either from the experimental results of testing on the core, or from thepractical results of exploration and exploitation in the oilfield, the subsurface mediumshows more or less the non-elastic characteristics, namely viscoelastic behavior.

经典的弹性理论是建立在精确遵守虎克定律的基础之上的，弹性波动理论适用于对弹性介质中传播的地震波的刻画和描述，但是无论是对地下岩芯的实验室测试，还是油田的勘探开发实践，都已经证实地下介质或多或少地表现出非完全弹性，即粘弹性行为。

Two principal types of seismic waves are generated, body waves which travel from the hypocenter directly through the earth's lithosphere and surface waves which travel from the epicenter along the surface of the earth.

主要有两种类型的地震波生成、这波从震源旅游机构直接通过地球表面的岩石圈、旅行中浪从震央沿地球表面。

The static correction study because of the hypsography, the surface low, falls the speed belt lateral change to the earthquake wave transmission influence, and carries on the correction to it, causes the reflected wave distance curve approximately is a smooth hyperbolic curve.

静校正就是研究由于地形起伏，地表低、降速带横向变化对地震波传播的影响，并对其进行校正，使反射波时距曲线近似为一条光滑的双曲线。

The usual travel time tomography method is based on geometrical ray theory,however,it assumes that the seismic wave has very high frequency,which often makes the tomographic inversion have ill posed problem because of the sparse ray distribution in the model space and finally affects the reliability and resolution of the tomographic results.

基于几何射线理论的旅行时层析方法假设地震波频率足够高，这样往往由于射线存模型空间的稀疏分布，使层析反演问题具有严重的不适定性，从而极大地影响层析成像结果的可靠性和分辨率。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。