The upwind finite-difference method is used for traveltime calculations;
用逆风有限差分方法计算程函方程；
The traveltime-distance curve of reflected P-wave in VTI media is not hyperbolic anymore.
VTI介质中反射P波时距曲线一般不再是双曲线。
This lays a foundation for the traveltime and velocity analysis of reflective seismic waves.
这为反射地震波的旅行时及速度分析提供了基础。
WTW inversion is a hybrid inversion method of wave-equation traveltime inversion (WT) and waveform inversion.
反演是基于波动方程的走时反演(WT反演)和波形反演的联合反演方法。
The traveltime in anisotropic media is calculated, in the present study, based on the first order perturbation theory.
根据各向异性介质的扰动理论来计算走时。
This algorithm USES ray tracing to calculate traveltime, and DE - rives reflection amplitude from wave field interface equation.
该算法使用射线追踪计算传播时间，应用波场界面方程计算反射振幅。
Wave function is used to calculate the traveltime and its derivative(perturbation of traveltime with respect to velocity) in WT inversion.
反演是基于波动方程的走时反演（WT反演）和波形反演的联合反演方法。
The range of acceptable traveltime can be obtained through the center, upper and lower bounds controlled by fitting distribution in quality control.
利用拟合的分布控制行程时间的中心线、上下限，从而对行程时间的可接受极限值进行界定，对道路网行程质量进行控制。
The least traveltime ray tracing method can greatly reduce the amount of calculation for tomographic inversion and increase the accuracy for ray tracing.
研究的最小旅行时射线追踪法可大大减少层析反演的计算工作量并提高射线追踪的精度；
The least traveltime ray tracing method can greatly reduce the amount of calculation for tomographic inversion and increase the accuracy for ray tracing.
研究的最小旅行时射线追踪法可大大减少层析反演的计算工作量并提高射线追踪的精度；
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