Zobrazeno 1 - 10
of 45
pro vyhledávání: '"João M de Araújo"'
Autor:
Gustavo Z Dos Santos Lima, João V T de Lima, João M de Araújo, Gilberto Corso, Sérgio Luiz E F da Silva
Publikováno v:
PLoS ONE, Vol 18, Iss 3, p e0282578 (2023)
The conventional approach to data-driven inversion framework is based on Gaussian statistics that presents serious difficulties, especially in the presence of outliers in the measurements. In this work, we present maximum likelihood estimators associ
Externí odkaz:
https://doaj.org/article/f7c410d8aae34d588a70831286d171e0
Publikováno v:
PLoS ONE, Vol 17, Iss 11, p e0275416 (2022)
The estimation of physical parameters from data analyses is a crucial process for the description and modeling of many complex systems. Based on Rényi α-Gaussian distribution and patched Green's function (PGF) techniques, we propose a robust framew
Externí odkaz:
https://doaj.org/article/26d2567dfb6e4ff89a4457ef9d3bcf81
Autor:
Sérgio Luiz E F da Silva, Pedro T C Carvalho, Carlos A N da Costa, João M de Araújo, Gilberto Corso
Publikováno v:
PLoS ONE, Vol 15, Iss 10, p e0240999 (2020)
Full-waveform inversion (FWI) is a powerful technique to obtain high-resolution subsurface models, from seismic data. However, FWI is an ill-posed problem, which means that the solution is not unique, and therefore the expert use of the information i
Externí odkaz:
https://doaj.org/article/46e1efaf05824b27bdad5507070825a4
Autor:
Suzane A. Silva, Sérgio Luiz E. F. da Silva, Renato F. de Souza, Andre A. Marinho, João M. de Araújo, Claudionor G. Bezerra
Publikováno v:
Entropy, Vol 23, Iss 8, p 1081 (2021)
The seismic data inversion from observations contaminated by spurious measures (outliers) remains a significant challenge for the industrial and scientific communities. This difficulty is due to slow processing work to mitigate the influence of the o
Externí odkaz:
https://doaj.org/article/255f691e825a42279e1fc0ec9a6dbc7e
Publikováno v:
Entropy, Vol 23, Iss 5, p 599 (2021)
Full waveform inversion is an advantageous technique for obtaining high-resolution subsurface information. In the petroleum industry, mainly in reservoir characterisation, it is common to use information from wells as previous information to decrease
Externí odkaz:
https://doaj.org/article/0935f1e26bae4d47b2529a5bd2fb1c76
Publikováno v:
Entropy, Vol 22, Iss 4, p 464 (2020)
The nonextensive statistical mechanics proposed by Tsallis have been successfully used to model and analyze many complex phenomena. Here, we study the role of the generalized Tsallis statistics on the inverse problem theory. Most inverse problems are
Externí odkaz:
https://doaj.org/article/7e128ddd65a3425caf70339c091712f2
Autor:
Mauro S. Ferreira, João M. de Araújo, Danyelle da Silva, Wagner Almeida, Edwin Fagua Duarte, Francisco A Moura
Publikováno v:
GEOPHYSICS. 86:R811-R823
We have designed a target-oriented methodology to perform full-waveform inversion (FWI) using a frequency-domain wave propagator based on the so-called patched Green’s function (PGF) technique. Originally developed in condensed matter physics to de
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::640408b2a90dcdbee8d5ac761ae8a633
https://doi.org/10.1190/geo2020-0640.1
https://doi.org/10.1190/geo2020-0640.1
Publikováno v:
Pure and Applied Geophysics. 178:3415-3426
Full-waveform inversion (FWI) is a powerful methodology employed in estimating subsurface physical parameters. FWI is classically formulated as a data-fitting problem based on minimizing the squared $$l_2$$ -norm of the difference between the observe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0a6c8267b39fed9c020ad31ff8970f7c
https://doi.org/10.1007/s00024-021-02839-3
https://doi.org/10.1007/s00024-021-02839-3
Autor:
Mauro S. Ferreira, Liacir S. Lucena, Danyelle P Silva, Edwin Fagua Duarte, Wagner de Almeida Barbosa, Francisco A Moura, João M. de Araújo
Publikováno v:
Journal of Geophysics and Engineering. 17:914-922
Modern visualization can be formulated as inversion problems that aim to obtain structural information about a complex medium through wave excitations. However, without numerically efficient forward calculations, even state-of-the-art inversion proce
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::342d0133c81d09f4b91c781017efce4d
https://doi.org/10.1093/jge/gxaa052
https://doi.org/10.1093/jge/gxaa052
Publikováno v:
Journal of Geophysics and Engineering. 17:906-913
A shot-encoding technique can be used in seismic waveform inversion to significantly reduce the computational cost by reducing the number of seismic simulations in the inversion procedure. Here we developed two alternative shot-encoding schemes to pe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cf40fb0915624fa53123ce7aa9a50530
https://doi.org/10.1093/jge/gxaa051
https://doi.org/10.1093/jge/gxaa051