travel time curve

This method involves forward modeling wavefield identification,interactive travel time pickup,minimum travel time ray tracing in the interface net,spline coefficient inversion instead of slowness inversion and final velocity field synthesising.

该方法利用正演模型识别波场，用交互法拾取走时，采用界面网最小走时射线追踪法进行射线追踪，并用反演样条系数代替反演慢度，最后合成速度场。

However,multiple modes and different dispersion properties make travel time extraction of single mode difficult.

薄板超声Lamb波层析成象研究中,走时是重要的信号特征,但多模式和频散特点给单一模式走时提取带来困难,一般信息提取技术对Lamb波分析较难有理想结果。

Exact traveltime computation in multi-layered transversely isotropic media with vertical symmetry axis;

多层垂直对称轴横向各向同性介质精确走时计算

(1) To ensure the stability of the program,we also consider the refracted and diffracted waves to calculate the traveltimes.

回顾了波前扩展有限差分地震波走时算法及其主要优缺点,分析了该算法在程序实现过程中存在的一些问题。

Traveltime-computation is widely used in seismic modeling, imaging and velocity analysis, etc.

走时计算已广泛用于地震建模、成像及速度分析等诸方面。

Fast marching method (FMM) is a fast, accurate and stable traveltime computation method.

波前快速推进法(FMM)是一种快速、准确而稳定的走时计算方法,它不仅计算速度快、灵活性好,而且对任何复杂速度场都具有无条件稳定的特点。