震源

It consists of three parts:accurately controlled signal source,time signal stacker and "sompi" cepstrum method.

它包括三部分：精密可控震源、信号叠加器和"存否"倒谱方法。

On the basis of first-hand data, the two periods of stress field since Mesozoic are restored by means of the stereographic projection method,on the other hand,the present stress field is studied by means of the focal mechanisms solution.

根据实测数据，利用赤平投影方法确定研究区地质时期两期应力场，通过震源机制解得到现代应力场。

Dislocation and stress drop on the strike or normal fault were obtained. In the second stage of dynamic analysis, the time-dependent shear stress release was applied on the fault plane to excite fault movement and ground vibration.

然后以断层面上的剪应力释放作为外部动态荷载，进行了断层运动的动态分析，通过数值计算得到震源断层附近的地面加速度、速度与位移的时间过程。

The source time function directivity is in accordance with the P waveform directivity, clearly showing that the nodal plane of strike 199° is the fault plane and that the earthquake ruptured unilaterally from the northeast to the southwest.

震源时间函数的这种方向性效应与P波的方向性效应相一致，清楚地表明：走向为199°的节面为断层面，地震是从东北向西南方向单侧破裂的。

Studies on the earthquake sequences and the source mechanisms of the strong earthquakes show that Yunnan has more obvious subarea characteristics of earthquake type.

对云南地震序列和强震震源机制的分析与研究表明，云南地区具有较明显的地震类型分区特征。

The subsurface coverage is from 13 to a point halfway between 24 and the source.

地下覆盖段是从13道到24道至震源的中点。

This paper deals with the key technique of the portable vibrator system,whose correlation and tapper processing can restrain random noise and improve resolution greatly.

笔者介绍了轻便可控震源的关键技术，相关与锥化能有效地抑制随机噪声及环境噪声，提高信噪比与分辨率。

This dissertation discusses four problems that have relations with these topics. These problems are, i seismic moment tensor representation for explosions in ellipsoidal cavities and their seismic radiation patterns in the farfield; ii seismic waves from point sources in transversely isotropic media; iii yield-estimation by mb or mb for Chinese underground nuclear explosions and, iv simultaneously inversion for source parameters of underground nuclear explosions and parameters of apparent Lg Q for paths from source to stations.

本文讨论与此课题有关的椭球腔中的爆炸的地震矩张量表示及地震波辐射图案，各向异性介质中的点源激发的弹性波，由Lg波震级或Lg尾波震级估算地下核爆炸当量，由Lg波位移谱反演地下核爆炸震源参数及相关路径的Lg波视衰减参数等四个方面的问题。

Each potential seismic source is simulated by a series connection of linear springs and slider called abasic system and the interaction between two basic systems is simulated by an equivalent coupling spring.

这一模型是将每一潜在震源等效为由线性弹簧和刚性滑块串联而成的子系统，相邻的两个基本系统之间的相互影响则用一个等效的耦合弹簧模拟。

The high temperature and high pressure experiments show that the strength of rocks is very high in earthquake source (mainly granitic rocks, such as adamellite), which could sustain great different stress and accumulate huge energy. This is one of major causes for high-angle reverse fault slip and high intensity of Wenchuan earthquake.

岩石破裂-黏滑-摩擦实验表明，以二长花岗岩为代表的震源区岩石具有很高的破裂强度和摩擦强度，能够承受极大的差应力和积累巨大的能量，这是高角度逆断层能够滑动和汶川地震强度大的原因之一。

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％。