Zobrazeno 1 - 10
of 115
pro vyhledávání: '"Jessé C Costa"'
Publikováno v:
GEOPHYSICS. 88:S1-S16
The inverse-scattering imaging condition (ISIC) for reverse time migration (RTM) aims at recovering amplitudes proportional to seismic reflectivity. It has been derived as the high-frequency asymptotic inverse of Born modeling, which justifies its be
Autor:
Ana Paula O. Muller, Jessé C. Costa, Clecio R. Bom, Elisangela L. Faria, Matheus Klatt, Gabriel Teixeira, Marcelo P. de Albuquerque, Marcio P. de Albuquerque
Publikováno v:
GEOPHYSICS. 87:R453-R463
Delimiting salt inclusions from migrated images is a time-consuming activity that relies on highly human-curated analysis and is subject to interpretation errors or limitations of the methods available. We propose to use migrated images produced from
Autor:
Ana P O Muller, Clecio R Bom, Jessé C Costa, Matheus Klatt, Elisangela L Faria, Bruno dos Santos Silva, Marcelo P de Albuquerque, Marcio P de Albuquerque
Publikováno v:
Geophysical Journal International. 232:975-989
The accurate and fast estimation of velocity models is crucial in seismic imaging. Conventional methods, like Tomography and Full-Waveform Inversion (FWI), obtain appropriate velocity models; however, they require intense and specialized human superv
Autor:
Ana P O Muller, Jessé C Costa, Clecio R Bom, Matheus Klatt, Elisangela L Faria, Marcelo P de Albuquerque, Marcio P de Albuquerque
Publikováno v:
Geophysical Journal International.
Summary Full-Waveform Inversion (FWI) is the current standard method to determine final and detailed model parameters to be used in the seismic imaging process. However, FWI is an ill-posed problem that easily achieves a local minimum, leading the mo
Autor:
Alex T. Oliveira, Renato R. S. Dantas, Walter E. Medeiros, Jessé C. Costa, Victória F. Amaral
Publikováno v:
Pure and Applied Geophysics.
Publikováno v:
GEOPHYSICS. 86:T337-T348
We have developed a procedure to derive low-rank evolution operators in the mixed space-wavenumber domain for modeling the qP Born-scattered wavefield at perturbations of an anisotropic medium under the pseudoacoustic approximation. To approximate th
Publikováno v:
GEOPHYSICS. 84:R539-R551
Most of the approaches designed to avoid cycle skipping in full-waveform inversion (FWI) involve calculating a sequence of inversions in a multiscale fashion. We have adopted an alternative strategy, which is inverting a sequence of different misfit
Publikováno v:
GEOPHYSICS. 84:IM19-IM33
We have developed a new and robust method (in the sense of it being applicable to a wide range of situations) to estimate the regularization parameter [Formula: see text] in a regularized inverse problem. For each tentative value of [Formula: see tex
Autor:
Alok K. Soni, Carlos A.N. da Costa, Jessé C. Costa, D.J. Verschuur, Walter Eugênio de Medeiros
Publikováno v:
Geophysical Prospecting. 67:69-84
Nowadays, full-waveform inversion, based on fitting the measured surface data with modelled data, has become the preferred approach to recover detailed physical parameters from the subsurface. However, its application is computationally expensive for
Publikováno v:
2019 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC).
In this work, we investigate the impact of fron-thaul degradation on the end-user performance of a CRAN based network, as is the case of 4G and 5G. Several scenarios, considering different transmission rates in fronthaul are experimentally analyzed.