Zobrazeno 1 - 10
of 46
pro vyhledávání: '"Nilson C. Roberty"'
Publikováno v:
Journal of Advances in Mathematics and Computer Science. :97-117
Based on the SIR model that divides the population into susceptible, infected and removed individuals, data about the evolution of the pandemic compiled by the Johns Hopkins University Center for Systems Science and Engineering (JHUCSSE) are integrat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::642e0510a4c64be76df66a58a8acbafa
https://doi.org/10.9734/jamcs/2021/v36i330349
https://doi.org/10.9734/jamcs/2021/v36i330349
Autor:
Nilson C. Roberty
Publikováno v:
Journal of Advances in Mathematics and Computer Science. :73-89
The inverse problem for determination of parameters related to the support and/or functions describing the intensity of coefficient and sources in models based strongly elliptic second order systems is posed with Cauchy data over specification at bou
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aa975e3cd4fb7d3269ac3314017e632d
https://doi.org/10.9734/jamcs/2020/v35i930324
https://doi.org/10.9734/jamcs/2020/v35i930324
Publikováno v:
C.Q.D.– Revista Eletrônica Paulista de Matemática. 14:84-94
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::08b383516bba865a7a8a40de9693d4b5
https://doi.org/10.21167/cqdvol14ermac201923169664dmsmlsrncr8494
https://doi.org/10.21167/cqdvol14ermac201923169664dmsmlsrncr8494
Autor:
Nilson C. Roberty, Rogerio C. Nunes
Publikováno v:
Journal of Applied Mathematics, Vol 2011 (2011)
We introduce algorithms marching over a polygonal mesh with elements consistent with the propagation directions of the particle (radiation) flux. The decision for adopting this kind of mesh to solve the one-speed Boltzmann transport equation is due t
Externí odkaz:
https://doaj.org/article/2a24db72ca514c92a06ea1c7e24b9eb6
Publikováno v:
Mathematical Problems in Engineering, Vol 2017 (2017)
We consider the inverse problem that consists in the determination of characteristic sources, in the modified and classical Helmholtz equations, based on external boundary measurements. We identify the location of the barycenter establishing a simple
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5c3f238be1c20b8b69a863e0b10c980e
https://doi.org/10.1155/2017/2472060
https://doi.org/10.1155/2017/2472060
Publikováno v:
Proceeding Series of the Brazilian Society of Computational and Applied Mathematics.
In we considered the inverse problem that consists in the determination of the support of characteristic sources in physical phenomena described by the modified and classical Helmholtz equations, from boundary measurements. There we identified the lo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8cadbbfbbc5342dd580784c37f30de9c
https://doi.org/10.5540/03.2017.005.01.0492
https://doi.org/10.5540/03.2017.005.01.0492
Autor:
Nilson C. Roberty, Denis Mota de Sousa
Publikováno v:
Inverse Problems in Science and Engineering. 20:891-915
In this work we consider a source reconstruction problem for stationary diffusion–advection–decay equation from boundary data. Making a change of variable, we obtain an equivalent modified Helmholtz source problem. Some continuation solutions in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f3b733d59a74b8de8e771a754efc4b11
https://doi.org/10.1080/17415977.2011.609466
https://doi.org/10.1080/17415977.2011.609466
Autor:
Nilson C. Roberty, Denis Mota de Sousa
Publikováno v:
Trends in Computational and Applied Mathematics. 12:101-110
Consideramos o problema inverso de identificacao de fontes para a equacao unidimensional de difusao-adveccao com coeficientes constantes a partir de informacoes no bordo do dominio. E apresentada uma formulacao variacional do problema tendo como espa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::af3121244c60f96e0f34878e994b6440
https://doi.org/10.5540/tema.2011.012.02.0101
https://doi.org/10.5540/tema.2011.012.02.0101
Publikováno v:
Computational & Applied Mathematics. 29:343-358
In the present work the inverse problem of identification of radiative properties, the total extinction and scattering coefficients, is analyzed and explicitly formulated based in an elementary semi-group theory. The Chandrasekhar discrete ordinates
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3da0f96c0b5077a6f4f69a3208341f0f
https://doi.org/10.1590/s1807-03022010000300002
https://doi.org/10.1590/s1807-03022010000300002
Publikováno v:
Computational & Applied Mathematics. 29:359-374
The steady state inverse radiative transfer problem in one-dimensional participating media is studied as an example of application of the new methodology presented in a accompanying paper by the authors [2]. Spectral methods are used for the appropri
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a05301cdb7afab8d5bc5d3da11a4625e
https://doi.org/10.1590/s1807-03022010000300003
https://doi.org/10.1590/s1807-03022010000300003