Results 1 to 10 of about 40,315 (288)
Regional-scale joint seismic body- and surface-wave travel time tomography
地球与行星物理论评, 2023 To make full use of seismograms to put tight constraints on the structure of subsurface and earthquake sources has always been the research focus in seismology.
Hongjian Fang +3 more
doaj +1 more source
An efficient method of 3-D elastic full waveform inversion using a finite-difference injection method for time-lapse imaging [PDF]
, 2015 International audienceSeismic full waveform inversion is an objective method to estimate elastic properties of the subsurface and is an important area of research, particularly in seismic exploration community.
Borisov, Dmitry +2 more
core +10 more sources
Convolution Coding and Amplitude Attenuation-Based Full Waveform Inversion
IEEE Access, 2020 Full waveform inversion (FWI) is a powerful method to reconstruct the properties of the subsurface media. However, the standard FWI is a non-unique and ill-posed inversion problem, which requires proper techniques to avoid cycle skipping phenomena ...
Shiqi Dong +4 more
doaj +1 more source
Full Waveform Inversion for NDT using ultrasonic linear arrays
Research and Review Journal of Nondestructive Testing, 2023 Ultrasonic (UT) imaging is a widespread technique for nondestructive testing (NDT). The state-of-the-art UT image reconstruction algorithms are based on delay-and-sum (DAS) operations, which assume constant acoustic velocity across the tested objects ...
Daniel Rossato +5 more
doaj +1 more source
Scale properties of the seismic wavefield - perspectives for full waveform matching [PDF]
, 2011 Starting from the nondimensionalization of equations of motion we partition the set of the velocity models in equivalence classes, such that the full waveform of an element in a given class can be calculated from the full waveform of any other element in
Aki K. +4 more
core +1 more source
Interferometric full-waveform inversion [PDF]
GEOPHYSICS, 2019 Velocity errors in the shallow part of the velocity model can lead to erroneous estimates of the full-waveform inversion (FWI) tomogram. If the location and topography of a reflector are known, then such a reflector can be used as a reference reflector to update the underlying velocity model.
Mrinal Sinha, Gerard T. Schuster
openaire +2 more sources
Transfer Learning Enhanced Full Waveform Inversion*
2023 IEEE/ASME International Conference on Advanced Intelligent Mechatronics (AIM), 2023 We propose a way to favorably employ neural networks in the field of non-destructive testing using Full Waveform Inversion (FWI). The presented methodology discretizes the unknown material distribution in the domain with a neural network within an adjoint optimization.
Kollmannsberger, Stefan +2 more
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Full waveform inversion for bore reconstruction of woodwind-like instruments
Acta Acustica, 2021 The internal geometry of a wind instrument can be estimated from acoustic measurements. For woodwind instruments, this involves characterizing the inner shape (bore) but also the side holes (dimensions and location).
Ernoult Augustin +3 more
doaj +1 more source
Chapter 5 Full waveform inversion [PDF]
, 2020 In the geophysics of oil exploration and reservoir studies, the surface seismic method is the most commonly used method to obtain a subsurface model in 2 or 3 dimensions. This method plays an increasingly important role in soil investigations for geotechnical, hydrogeological and site characterization studies regarding seismic hazard issues.
openaire +3 more sources
Towards full waveform ambient noise inversion [PDF]
Geophysical Journal International, 2017 ISSN:0956 ...
Sager, Korbinian +3 more
openaire +2 more sources