Tong has proposed an adjoint-state traveltime tomography method to determine velocity
heterogeneity and azimuthal anisotropy. This method, however, ignores the Earth's …

Adaptive Erlangization is a flexible observation/intervention strategy for system management
based on randomized observation frequencies. The main contributions of this paper are the …

Seismic inversion of amplitude versus offset (AVO) data in viscoelastic media can potentially
provide high-resolution subsurface models of seismic velocities and attenuation from …

The sensitivity kernel of each parameter is angle-dependent in an anisotropic traveltime
multiparameter inversion. To analyze the angle illumination in a transversely isotropic media …

Accurate and efficient computation of traveltimes and their spatial derivatives for 3D
heterogeneous media is essential in many areas of seismology, such as traveltime/slope …

Automatically picking reflection traveltimes from the prestack shot gathers and positioning
and updating the reflector depths during inversion are challenging in conventional eikonal …

The adjoint-state method of first arrival traveltime tomography, featured with implicit ray
tracing calculation, was used to compute the gradient of the misfit function without …

The conventional adjoint-state reflection traveltime tomography (ASRT) method based on
the Eikonal equation is limited with respect to two aspects: the first is automatically picking …

Efficient and accurate traveltime calculations of seismic waves have important applications
in tomography, prestack migration, earthquake location, etc. Anisotropy significantly affects …

First-arrival traveltime and slope tomography uses traveltimes, source and receiver slopes of
locally-coherent events to build high-resolution subsurface velocity models. These models …