Newton full-waveform inversion approach combined with a hybrid unsplit-field PML has been developed. The proposed inversion method improves the accuracy and efficiency of solutions compared to existing inversion methods. The proposed full-waveform inversion gauss elimination method example pdf is robust even in the presence of noise in measured responses. This study considers the characterization of subsurface shear wave velocity profiles in semi-infinite media using scalar waves.
The PML is introduced to limit the semi-infinite extent of the half-space and to prevent reflections from the truncated boundaries. A hybrid unsplit-field PML is formulated in the inversion framework to enable more efficient wave simulations than with a fully mixed PML. PML-endowed wave equations via Lagrange multipliers. The KKT conditions consist of state, adjoint, and control problems, and are solved iteratively to update the shear wave velocity profile of the PML-truncated domain. Newton inversion method is accurate enough and more efficient than another inversion method. The algorithm’s performance is demonstrated by the numerical examples including the case of noisy measurement responses and the case of reduced number of sources and receivers.
Check if you have access through your login credentials or your institution. Changes must be reviewed before being displayed on this page. Carl Friedrich Gauss 1840 by Jensen. Gauss had an exceptional influence in many fields of mathematics and science, and is ranked among history’s most influential mathematicians. There are many other anecdotes about his precocity while a toddler, and he made his first ground-breaking mathematical discoveries while still a teenager. 1798, at the age of 21—though it was not published until 1801. This work was fundamental in consolidating number theory as a discipline and has shaped the field to the present day.