accurate velocity field is the key to find and delineate drilling target in dongling area due to complex velocity distribution.
东岭地区地震速度场变化复杂,建立合理的速度场是发现和落实鉆探目标的关键。
finally, we give as an example the calculation of complex velocity potential for a twisted duct with square cross-section.
最后给出了一个方形扭曲管的复速度势计算实例。
ray tracing techniques are widely applied in seismology, among which the shortest path method (spm) is robust for 3-d ray tracing in complex velocity structures.