基于三维射线跟踪的微变网络方法和波前重建思路 ，提出一种适用于三维复杂介质地震波走时的快速算法。
This paper presents a three-dimensional propagation model for path-loss prediction in an urban microcell, based on ray-tracing techniques.
如果我们测得地震波的走时和振幅，我们就能够确定地下的几何形状并估算与岩石速率和密度有关的声阻抗。
Seismic measurements of travel time and amplitude define the subsurface geometry and give estimates of the acoustic impedances related to rock velocities and densities.
在地震波初至走时拾取研究上，寻找既保证准确性，又能提高运算速度的方法，以适应现场评价需求。
On the study of seismic first break, in order to fit the requirements of locale evaluation, it is needed to find a method that can assure accuracy and improve the speed of computation.
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