震源

And introduces the latest development of air gun.

及气枪震源的最新发展动态。

Air gun source could be used for exploring the regional fine structure and monitoring the temporal variation.

气枪震源可以用于区域精细结构的探测以及动态变化的监测。

High-pressure air is needed for airgun source operation.

气枪震源作业需要高压空气。

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。

So this research is of great theoretical importance for further study of effects of anisotropy of medium on source characteristics of underground explosions.

因此，这一研究对进一步深入分析介质各向异性性质对地下爆炸震源特性的影响具有重要的理论意义。

This paper presents a normal air-gun array by comparing the performance parameter and theory of several air-gun source.

本文从气枪震源的发展入手，对各类气枪的性能、数和工作原理进行了分析比较，列出了各类气枪的常用阵列。

Based on focal fracture mode developed by Brune(1997), the relations of peak va lues of, stress drop Δσ and ambient stress τ0 have been deduced.

根据Brune(1970)地震震源破裂模式，导出了地面运动峰值速度参数与应力降Δσ或环境应力τ0值的依赖关系。

Based on Brune ω~2 source spectrum ,Hanks and McGuire deduced a simplified formula of RMS accelera- tion by stationary random vibration theory and Parseval theorem.

Hanks 和 McGuire 基于 Brune 的ω~2震源谱，借助平稳随机振动理论和 Parseval 定理给出了估计均方根加速度衰减关系的表达式。

While the former two series are not represented on this occasion, what remains most prominent in a cognitive sense is the intensity of the focal depth, as the burnt umber, charcoal grey and black traces draw one's eye away from the diffused fields of pale blue and grey which surround the figures, and are polycentric in their effect.

而前两个系列则没有在这个场合表示，剩下最突出的认知意义上是震源深度强度，作为烧毁棕土，木炭灰色和黑色的痕迹抽签的眼睛远离扩散领域的浅蓝和环绕着灰色的数字，并在他们的影响多中心。

These five sources comfit for different the surface and geologic task, and have good effect.

这五种震源可适用于不同的地表条件和地质任务，应用效果较好。

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％。