震源

We suggest a consistency principle to derive velocity models. It states that we should search for an imaging velocity field that yields the same image position independent of source or receiver position.

建议用一个相容原理来导出速度模型，这就要求寻找一个合适的成像速度场，该速度场不受震源和接收器位置的约束而有相同的成像位置。

The extracted P-wave is reverse-time extrapolated and imaged with a P-velocity model using a finite difference solution of the scalar wave equation, the extracted S-wave is reverse-time extrapolated and imaged similarly, but with an S-velocity model, and converted S-wave data requires a polarity correction prior to migration to ensure constructive interference between data from adjacent source.

在模型中，每个网格点的纵、横波成像时间，为震源到该网格点的纵波初至时间。利用纵波速度模型和声波传播方程的有限差分解，对反射纵波进行逆时延拓和成像，利用横波速度模型和声波传播方程的有限差分解，对转换横波进行逆时延拓和成像，并在偏移前进行极性校正。

The cumulative earthquake frequency curve of the Jiashi swarm shows that the high tectonic stress was maintained in the swarm area during active period between Jan.

6巨大的地形应力影响，使伽师震源区构造应力场与毗邻构造单元的构造应力场存在较大差异。

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。

The main shock occurred on the dextral obduction-type fault zone and the hypocenter depth was about 15km .

汶川地震的主震发生在具有右旋性质的仰冲型断层带上，震源深度为15公里左右。

The direction of the maximum principal compressive stress axis in the area is trending NEE.

从浅源地震的震源机制分析发现，研究区平均最大主压应力方向为NEE-SWW向。

In this paper, some qualitative analyses are carried out to study the characteristics of rupture process, such as rupture directivity and hanging wall effect.

本文对此做了一些定性的分析，认为高烈度区的分布与震源机制和破裂过程存在一定的相关性，并且在近断层地区很可能存在着较为显著的方向性效应和上盘效应。

This paper has analysed a great many of problems, such as the spatial distribution law of the earthquake and the move of the seismic source.

分析了地震的空间与分布规律和地震的震源迁移等问题。

Seismic tomography is used to study the 3-D seismic velocity structure andattenuation structure of earth by the seismic wave information obtained from a largenumber of passive earthquakes and artificial earthquakes.

地震层析成像是一项通过综合大量天然震源或人工源激发的地震波信息来研究三维地震速度图象或地球衰减结构图象的技术。

We want to find the location, depth and origin time of an earthquake whose waves arrive at the times measured on each seismograms.

我们想通过地震仪记录地震波经过的时间，确定震源的地点、深度和发生时间。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐