1·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。
2·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。
3·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。