Blar i Institutt for geovitenskap og petroleum på forfatter "Raknes, Espen Birger"
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Computational and robustness improvements in waveform inversion
Aaker, Ole Edvard (Doctoral theses at NTNU;2022:313, Doctoral thesis, 2022) -
Elastodynamic full waveform inversion on GPUs with time-space tiling and wavefield reconstruction
Aaker, Ole Edvard; Raknes, Espen Birger; Arntsen, Børge (Peer reviewed; Journal article, 2020)Full waveform inversion (FWI) is a procedure used to determine the elastic parameters of the Earth by reducing the misfit between observed elastodynamic wavefields and their numerically modelled counterparts. The numerical ... -
Three Dimensional Elastic Full Waveform Inversion
Raknes, Espen Birger (Doctoral thesis at NTNU;2015:212, Doctoral thesis, 2015)The full waveform inversion (FWI) method is a technique for estimating subsurface elastic parameters using inverse theory. FWI is formulated as an optimization problem that seeks to minimize the dissimilarities between ... -
Wavefield reconstruction for velocity–stress elastodynamic full-waveform inversion
Aaker, Ole Edvard; Raknes, Espen Birger; Pedersen, Ørjan; Arntsen, Børge (Peer reviewed; Journal article, 2020)Gradient computations in full-waveform inversion (FWI) require calculating zero-lag cross-correlations of two wavefields propagating in opposite temporal directions. Lossless media permit accurate and efficient reconstruction ...