地震波

Absorption and attenuation of seismic wave in viscoelastic medium have been analyzed from the theory through viscoelastic wave equation.

地震波的这种衰减和频散，使得不能直接从地震数据上得到准确的地下信息和分辨率更高的图像。

The portable mine detector,which is used to make advance detection of the front small structure of the mining faces by utilizing the diffracted wave ,has become an effective auxiliary tool for the forecasting in the tunnelling.

便携式矿井探测仪是应用绕射波来超前探测巷道掌子面前方小构造的，在速度低于上下围岩的中等速度的特定层位中，地震波将在前方的小断层或小构造处反射，以绕射波形式返回到检波器，其最远的探测距离达184m，成为在掘进巷道中预测预报的有效辅助工具。

This study has laid foundation for the development of future applicants of MPC in practical anti-seismic design.

仿真结果表明预测控制是一种简单、有效的控制方法，可以显著地减小高层建筑结构在地震波激励下的加速度和位移响应，为预测控制在实际抗震设计中的应用打下基础。

On the basis of the relationship between seismic wave speed and density the non symmetric structures of the Earth mantle are investigated by using seismic tomography data set in this paper.

利用 Su、Vasco、Hilst、Grand等提供的地震层析成像模型，根据实验室结果外推得到的地震波速度异常与密度异常之间的线性关系，将地幔进行分层、网格化处理，计算了地幔各层异常密度、密度异常质心和全地幔密度异常质心位置。

In the numerical simulation of the wave equation, to develop an absorbing boundary condition in the finite domain is a very important problem.

在地震波传播的数值模拟中，在有限区域建立吸收边界条件是一个很重要的问题。

The computation results on real seismic data show that mutual information in the sliding observation window can indicate the existence of the seismic signals to be detected. Through the pickup of the rising-break or the peak point of mutual information, the arrival time can also be effectively estimated.

计算结果表明，互信息量随滑动窗口移动的变化情况可以明确标示出待测地震信号的存在，通过提取互信息量的突变点或峰值点，能够有效拾取地震波的初至时刻。

The computation results on real seismic data show that mutual information in the sliding observation window can indicate the existence of the seismic signals to be detected. Through the pickup of the risingbreak or the peak point of mutual information, the arrival time can also be effectively estimated.

计算结果表明，互信息量随滑动窗口移动的变化情况可以明确标示出待测地震信号的存在，通过提取互信息量的突变点或峰值点，能够有效拾取地震波的初至时刻。

In this thesis , the characteristics of wavefield in orthotropy media was investigated by means of seismic physics model technique.

本文利用地震物理模型正演技术，开展正交各向异性介质地震波场特征的研究。

It is significant for energy exploration , seismic prospecting , groundwater utilized and rock engineering to study the characteristics of seismic wavefields in those orthotropy media.

研究正交各向异性介质中地震波场特征对地震预测、岩体工程、地下水利用和能源勘探开发有十分重要的意义。

At last, with this finite element model, this dissertation gave a relatively complete analysis to the lateral seismic nonlinear dynamic responses of the single pile, and analyzed the pile head's response spectrum, earthquake Fouriers spectrum, then a test parametric sensitivity analysis was taken into consideration, including modulus ratio of pile to soil, soil material damping ratio, earthquake input level.

第二，利用该有限元模型，较为全面地研究了地震荷载作用下的单桩横向非线性动力响应，分析了桩头反应谱、地震波傅里叶谱等，进行了桩土弹性模量比、土体材料阻尼比、地震动输入水平等因素对单桩横向非线性动力响应的参数敏感性分析。

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。