地震波

The difference of analyzes result could be up to several times even several decuple if could not add the restrict to the earthquake input.

如果对输入地震波不加限制，分析结果的差异可以高达几倍甚至几十倍。

Vibroseis is a new type of seismic source which will not bring the danger and destructibility of dynamite and can bestir repetitious sweeping signal.

而高分辨率地震勘探是一个系统工程，从地震波的激发、检波器阵列的布置、数据采集、数据处理到数据解释都应该遵守高分辨率地震勘探的准则。震源是产生地震信号的源头，其信号质量直接影响地震勘查效果。

Finally, a new deterministic optimization method is presented. All the local optimization solutions can be determined after finite times of parameter space identification and partition procedures.

本文概述了地震波勘探反演问题的理论基础和研究进展，阐述了反演中优化问题的解决方法和面临的困难，并提出了一种确定性全局优化的新方法。

The main frequency of explosion vibration wave of measuring points in different quantities of detonator is discussed.

分析不同药量爆破下各测点的波形主频率和药量相同、不同距离测点的加速度、主频及主频域，归纳出等距离测点、不同药量爆破振动的频谱特性和爆破地震波传播过程中频谱变化的特性，为类似工程提供借鉴。

The seismic wave field simulation method for optimizing finite difference operator in frequency-space domain is discussed.

讨论了频率–空间域优化有限差分算子地震波场模拟方法。

For example, dissemination in the geological material and function to the underground structure by blasting earthquake wave often cause the structure damage in varying degree, even appears serious consequence of the structure disarrangement .

爆破公害对环境的影响日显突出，如爆破地震波在地质材料中的传播及对地下结构的作用，往往引起结构不同程度的损伤，甚至出现结构破坏的严重后果，引发各种民事纠纷，阻碍了爆破事业的发展。

The viscosity of the medium will cause dissipation of seismic energy, thus decreasing the amplitude and modifying the frequency content of the propagating wavelet. In order to obtain accurate information and imaging with high distinguishability from seismic data, the propagating rule of wave in viscoelastic medium should be studied.

地震波在大地介质的传播过程中，不仅波的振幅会衰减，而且有频散现象，因此要从地震数据中得到复杂构造的准确信息和高分辨率的图像，就必须研究粘弹性介质中波的传播规律。

Except this, we found that the average results of structure under three earthquake waves are dower with the results of spectrum analysis.

在对结构进行弹性动力时程分析时，结构在人工波作用下的反应要大于实际波，且三条地震波作用下的平均值与谱分析结论相吻合。

This gives the conclusions that the period and earthquake response show to be small when base buries have 6 meters in difference under the same earthquake wave. The dual tower with base structure can be simplified as a single tower with a base structure to simplify seismic analysis and calculations with small errors, when stiffness of the basement of the dual tower is larger.

得出了如下结论：同一地震波作用下，在基础埋深相差6m左右时，其周期和地震反应相差较少；一个大底盘上双塔楼建筑当底盘刚度较大时，可以将双塔楼带底盘结构简化为单塔楼带底盘结构进行抗震分析计算，误差较小。

The current status and basic theory including fluctuation theory, structural dynamic equilibrium equation, calculation of self-vibration characters, dyn...

本文论述了结构动力分析发展现状和基本理论，包括：结构动力平衡方程、结构自振特性的计算、动力求解方法和地震波输入。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。