Results 211 to 220 of about 55,270 (261)

Full-waveform topographic lidar: State-of-the-art

ISPRS Journal of Photogrammetry and Remote Sensing, 2009
Nous présentons une étude bibliographique sur les systèmes lidar topographiques à retour d'onde complète, aussi nommés lidar full-waveform, ainsi que sur les données générées. Le contexte de cette étude se situe dans le domaine de la télédétection aérienne et spatiale par systèmes actifs.
Clement Mallet, Frédéric Bretar
exaly   +3 more sources

Full Waveform Inversion in Viscoelastic Media

2021
Accumulations of gas hydrates in the bottom layers pose not only a potential threat to offshore engineering structures and shipping. They can also cause the release of significant volumes of methane into the atmosphere. The most natural way to detect gas hydrates is to use seismic methods.
Vladimir A. Cheverda   +2 more
openaire   +1 more source

Combining Full Waveform Inversion and Tomography: Full Waveform Inversion-guided Tomography

Proceedings, 2015
With the new broadband acquisitions, allowing to record frequencies down to 2.5 Hz, and the new tomographic tools, allowing to resolve for vertical velocity components up to 6 Hz, we have moved velocity model building from the situation of a “mid-frequency gap” to the situation of an overlapping area in terms of the resolution we can expect from ...
T. Allemand, G. Lambaré
openaire   +1 more source

Source-domain full-waveform inversions

Geophysics, 2019
ABSTRACT Conventional full-waveform inversion (FWI) updates a velocity model by minimizing the data residuals between the predicted and observed data at the receiver positions. We have developed a new FWI to update the velocity model by minimizing virtual source artifacts at the receiver positions in the source-domain FWI (SFWI ...
Yulang Wu, George A. McMechan
openaire   +1 more source

Compressive simultaneous full-waveform simulation

Geophysics, 2009
Abstract The fact that the computational complexity of wavefield simulation is proportional to the size of the discretized model and acquisition geometry and not to the complexity of the simulated wavefield is a major impediment within seismic imaging.
Tim T.Y. Lin   +2 more
openaire   +1 more source

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