Removing numerical dispersion from linear evolution equations

Autor: Jens Wittsten, Erik F. M. Koene, Johan O. A. Robertsson, Fredrik Andersson

Publikováno v: Pure and Applied Analysis. 3:253-293

We describe a method for removing the numerical errors in the modeling of linear evolution equations that are caused by approximating the time derivative by a finite difference operator. The method is based on integral transforms realized as certain

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::09263b6fd157e2b0a11fcf8a95af335d
https://doi.org/10.2140/paa.2021.3.253

Reduced memory implementation of a local elastic finite-difference solver

Autor: Erik F. M. Koene, Ligia Elena Jaimes-Osorio, Polina Zheglova, Henrik R. Thomsen, Alison Malcolm

Publikováno v: GEOPHYSICS. 86:F25-F33

The recovery of elastic properties from seismic data often requires the iterative use of seismic modeling. Finite-difference (FD) simulation is a common component in seismic modeling, and it is usually the most computationally expensive step in metho

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b69eda1d682905b4ea22935f884980be
https://doi.org/10.1190/geo2020-0468.1

Elastic immersive wavefield modelling

Autor: Dirk-Jan van Manen, Andrew Curtis, Xun Li, Johan O. A. Robertsson, Erik F. M. Koene

Publikováno v: Journal of Computational Physics: X, 451

Many modelling studies of wave scattering require repeated numerical simulations through models with properties that differ only in a small sub-domain. Hence, it is of interest to recompute the wavefields that account for wave propagation through the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::454f8ca9b8f4a065b0c6af5cb4d1a9b3

Recent geospatial dynamics of Terceira (Azores, Portugal) and the theoretical implications for the biogeography of active volcanic islands

Autor: Paulo A. V. Borges, Arie C. Seijmonsbergen, W.M. de Boer, Sietze J. Norder, Kenneth F. Rijsdijk, Stacy Shinneman, S.M. Teixeira de Medeiros, S. Buijs, Rui B. Elias, Paolo Stocchi, Erik F. M. Koene, Carlos S. Melo, Rui Quartau, Robin Aguilée, J.C. Carreiro Nunes

Publikováno v: Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Agência para a Sociedade do Conhecimento (UMIC)-FCT-Sociedade da Informação
Frontiers of Biogeography
Frontiers of Biogeography, International Biogeography Society., 2020, 12 (3), pp.e45003. ⟨10.21425/F5FBG45003⟩
Frontiers of Biogeography, 12(3):e45003. eScholarship University of California

Ongoing work shows that species richness patterns on volcanic oceanic islands are shaped by surface area changes driven by longer time scale (>1 ka) geological processes and natural sea level fluctuations. A key question is: what are the rates and ma

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eeefa5e39d594997590084f1e185a45d

Eliminating Time Dispersion from Visco-Elastic Simulations with Memory Variables

Autor: Fredrik Andersson, Jens Wittsten, Johan O. A. Robertsson, Erik F. M. Koene

Publikováno v: 81st EAGE Conference and Exhibition 2019.

In recent years, it has been recognized that the seismic wave equation solved with a finite-difference method in time causes a predictable and removable error through the use of so-called time-dispersion transforms. These transforms were thought not

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5ef2c282f11beb694fd06d9319dd9b58
https://doi.org/10.3997/2214-4609.201901532