Two common issues of least-squares reverse time migration (LSRTM) consist of the many
iterations required to produce substantial subsurface imaging improvements and the …

Establishing effective seismic survey parameters in complex structural areas, such as salt
domes, is of vital importance for accurate imaging. Shot and group intervals, maximum …

Full-waveform inversion (FWI) is a technique for determining the optimal model parameters
by minimizing the seismic data misfit between observed and modeled data. The objective …

Ultrasonic echo testing is widely used in non‐destructive testing in civil engineering to
investigate concrete structures, to measure thickness, and to locate and characterise built‐in …

The ultrasonic echo technique is frequently used in non-destructive testing (NDT) of
concrete structures for thickness measurements, geometry determinations as well as …

The ultrasonic echo technique is a frequently used method in non destructive testing for
geometry determination of concrete building elements. Important tasks are thickness …

Model-based reconstruction offers an effective framework for solving diverse inverse
problems in geophysical imaging, and least-squares reverse time migration (LSRTM) can be …

Seismic velocity estimation is a challenging task, especially when no initial model is present.
In most cases, a traveltime tomography approach is used as a significant part of the …

Conventional seismic migration and inversion are inherently limited in their ability to detect
and characterize subsurface elements smaller than the seismic wavelength, such as faults …

Variable-grid methods have the potential to save computing costs and memory requirements
in forward modeling and least-squares reverse-time migration (LSRTM). However, due to …