地震波

By the Laplace transform method, the decreasing rule of particle displacement of seismic wave has been resolved and so does the rule of phase velocity, particle velocity in time and frequency domain respectively.

通过拉氏变换求得地震波质点位移的衰减变化规律，并进一步得到了相速度、质点速度在时间域和频率域的变化关系。

It is important to study the physical property of anisotropic media using the information of seismic wave aimed at probing into the earth.

利用地震波的信息，研究各向异性介质的物理性质对深入探究地球内部结构有着重要的作用。

It mainly contains the seismic velocity structure of the earth's interior, anisotropy of the mantle, mantle discontinuities and the physical properties of mantle. It can be found that new progress in the study on the structure and physical properties of earth's interior has been made in the recent years in China: In some preexistent areas much progress has been made, advanced methods have been adopted, extensive international co-operation has been conducted in many ways, the scope of the co-operation has gradually expanded, and some new fields appear as well.

从地球内部结构的地震波速度成像，地幔介质的各向异性，地幔间断面及地幔介质物性进行了综述，指出在一些原有的研究领域，工作更加深入，方法更加先进，而且进行了广泛的国际合作，合作的范围也逐渐扩大，方式多样，并开拓了一些新的研究方向。

This instrument will sense the first arriving non destructive primary wave and alert the people living nearly.

这个装置能感应到第一波到来的非破环性的地震波并警示附近生活的人们。

For this reason, Daqing Putaohua Area has switched over to adopting the product of integral amplitude and travel time apparent difference and finally has won much better results.

为此，在大庆长垣葡萄花地区采用了积分振幅与地震波旅行时视时差的积来预测储层厚度，取得了较好的效果。

Processors analyze and monitor seismic frequencies in order to select proper time and frequency parameters in data processing.

在地震勘探过程中，多种因素影响地震波频率的变化，在数据处理过程中分析和监控各种波场的频率属性能够使处理人员了解数据频率成分的变化规律，有针对性地选择处理中的空变参数和频变参数。F-X-Y谱估计方法在三维空间上统计有效波的频率，结果较准确，对问题的分析更加细致。

Estimated V〓、V〓 data from Kuandian xenoliths, combining with the observed V〓、V〓 data, imply that the composition of the uppermost mantle lithosphere within 40-50km beneath Kuandian may be composed of 50％ spinel peridotite and 50% garnet pyroxenite.

计算了不同产地深源包体的弹性波速V〓、V〓值，将宽甸地区包体波速计算值与实测地震波速资料进行对比，确定了宽甸地区上地幔岩石圈顶部的物质组成大致为50％的尖晶石橄榄岩+50％的石榴石辉石岩。

Although noise is relatively weak in the case of large offsets, seismic wave field is very complex. There are a variety of high-energy regular waves such as first arrivals and refractions.

在大偏移距处，虽然一些随机噪音会相对减弱，但地震波场十分复杂，各种有规律性的波，如直达波，折射波的能量很强。

The effects of gap length and stiffness of the restrainer , the ground motion strength, wan shape of ground motion and the collision between the girder and the abutment on the seismic load applied on the restrainer were compared.

分别比较了防止落梁装置的不工作长度、装置的刚度、地震强度、地震波波形、梁端与桥台之间的地震碰撞对装置承受最大地震荷载的影响。

The retortion influence of base isolating building and base fixed building under horizontal earthquake effect is discussed, and the difference between them under the same condition is compared.

本文介绍了减震结构的动力特性，并计算了结构在地震作用下各层的位移、速度、加速度和剪力等地震反应；分析了结构在同时受到两个水平方向地震作用时结构的地震反应，从与抗震结构的对比中可见其优越性；选用了不同场地上的地震波模拟了各类场地上的地震作用，分析比较了不同的场地对建筑物减震效果的差异；分析了橡胶垫水平刚度的变化对动力分析结果所造成的影响，提出了在橡胶垫恢复力曲线中，按线性模型进行简化计算的条件；讨论了隔震垫的设置位置，比较了隔震垫设置在首层柱的底部和设置在其它位置的区别；分析了减震结构在连续经历多次地震时（即在地震后、较大余震作用下）是否仍然能够减震的问题；并对水平地震作用下，减震结构和抗震结构的受扭情况进行了讨论，比较了同等条件下两种结构的区别。

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。