查询词典 seismic

Using an airgun as a repeatable seismic source and recording the data at a fixed point, the variation of shear wave splitting parameters can indicate the variation of local stress-strain fields, and hence provides a method for earthquake stress-forecasting.

气枪是高度可重复性人工震源，利用气枪定点激发和定点接收有可能精确获取S波分裂参数随时间的变化规律，为地震预测探索实践提供可靠的物理途径。

Jet grouting with high pressure is of particular advantage to strengthening of the ground in thick alluvion and soft soil vulnerable to seismic damage.

对震害严重的厚冲积层或厚软土层，用高压喷射注浆法进行加固处理有其独特的优越性。

Based on wave propagation feature, this paper analyses 3D seismic migration algorithms such as alternating direction implicit method, LU decomposition method, and inverse operator approach method. The result shows that the alternating direction implicit method is fast but causes distortion in wave field extrapolation and affects image accuracy; however LU decomposition and inverse operator approach methods are fast while holding circular symmetry of wave field, and are promising in oilfield exploration and development.

在波的传播特征分析基础上，对交替方向隐式法、LU分解法、逆算子逼近法等三维地震偏移算法进行了分析研究，结果表明，交替方向隐式法虽然快捷但是在波场外推中明显产生畸变并影响成像的准确性，而LU分解和逆算子逼近法是保持波场圆对称特征前提下的快速算法，在油田勘探开发中具有较好的应用前景。

In 10-20s period band, the sources of ambient seismic noise has a very clear seasonal variability.

由于短周期面波强烈的衰减和吸收效应，提取出的这一周期段的瑞利面波格林函数的信噪比较低。

The related codes, such as and the RP2A-WSD constituted by the American Petroleum Institute, are taken as reference for the determination of seismic design parameters of offshore platforms.

目前，一般是参照《建筑抗震设计规范》和美国石油协会制定的RP2A-WSD规范，依据地震安全性评价的技术规定，进行专门的地震动参数研究。

The influence of anchor bolt supports on seismic responses of strengthening grottoes is studied with the engineering soft ADINA.

利用大型通用ADINA有限元分析软件进行动力分析，研究锚杆加固对石窟地震反应的影响。

The kinetic characteristics of the wide angle seismic signal and the effect of the wide angle reflection for noise have been analyzed by the forward theoretical model.

利用正演理论模型分析了广角地震信号的运动学特徵以及噪声对广角反射的影响。

So it is very important to study the seismic migration technique based on the anisotropy theory.

因此，发展基于各向异性介质波动理论的偏移方法是非常必要的。

It is needed to study the influence on the detection effects, which is aroused by such as the level of integrity of the seismic prospecting event、the variety of the apparent dominant frequency of the Ricker wavelet.

为完善该方法，需要研究诸如地震勘探同相轴完整程度、组成同相轴的地震子波变化等对系统检测效果的影响。

The effects of mass ratio on dynamic Characteristics were investigated by solving the dynamic equation of the model. The approximate formula of seismic response were deduced based on Energy Conservation Law.

通过求解简化模型的动力方程，分析了质量比对连续梁桥纵桥向的动力特性的影响，并用能量法推导了低阶振型地震反应的近似公式。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。