Browsing Institutt for elektroniske systemer by Author "Raknes, Espen Birger"
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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 ... -
Imaging of Subsurface Injectite Structures
Estenstad, Ådne Gimse (Master thesis, 2019)Arbeidet i denne masteroppgaven har fokusert på seismisk avbildning av injektittstrukturer. Disse strukturene har en ikke-uniform geometri som kan gjøre avbildning utfordrende. Interesseområder for denne masteroppgaven inkluderer; ... -
Seismic wave modelling on GPU clusters
Pedersen, Anders Solberg (Master thesis, 2019)Vi utvikler et program for å simulere seismiske bølger på GPU-klynger ved hjelp av CUDA og MPI. Ved å bruke spektralelementmetoden til å løse den elastiske bølgelikningen i 3D kan problemet paralleliseres og løses effektivt. ... -
Towards Fine-Grained Dynamic Tuning of HPC Applications on Modern Multi-Core Architectures
Sourouri, Mohammed; Raknes, Espen Birger; Reissmann, Nico; Langguth, Johannes; Hackenberg, Daniel; Schöne, Robert; Kjeldsberg, Per Gunnar (Chapter, 2017)There is a consensus that exascale systems should operate within a power envelope of 20MW. Consequently, energy conservation is still considered as the most crucial constraint if such systems are to be realized. So far, ... -
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 ...