Extrapolation Method
Mostrando 13-24 de 60 artigos, teses e dissertações.
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13. Migração por extrapolação de ondas em três dimensões / Migration by wave extrapolation in three dimensions
In three dimensions, migration methods based on solving the one-way wave equation, besides facing problems to handle evanescent waves and to image steep dip reflectors, are still computationally expensive. For the problems of imaging steep dip reflectors and treat evanescent waves, in this dissertation, we use the complex Padé approximation. Because solving
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/04/2011
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14. Uma nova metodologia de extrapolação dos dados da prova de carga dinâmica: MES-CASE / A new method of extrapolating data from the dynamic laod test: MES-CASE
Desde 1983, quando o ensaio de carregamento dinâmico foi introduzido no Brasil, a execução deste tipo de ensaio vem se tornando uma prática comum em obras de fundação em estacas de concreto pré-moldado cravadas. Em vários casos o ensaio de carregamento dinâmico não mobiliza a resistência última da estaca ensaiada, as causas desses eventos podem s
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/02/2010
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15. Uma nova metodologia de extrapolação dos dados da prova de carga dinâmica: MES-CASE / A new method of extrapolating data from the dynamic laod test: MES-CASE
Desde 1983, quando o ensaio de carregamento dinâmico foi introduzido no Brasil, a execução deste tipo de ensaio vem se tornando uma prática comum em obras de fundação em estacas de concreto pré-moldado cravadas. Em vários casos o ensaio de carregamento dinâmico não mobiliza a resistência última da estaca ensaiada, as causas desses eventos podem s
Publicado em: 2010
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16. Pitfalls in the assessment of murine atherosclerosis
This review provides examples of the fact that different procedures for the measurement of atherosclerosis in mice may lead to interpretation of the extent of atherosclerosis having markedly different biological and clinical significance for humans: 1) aortic cholesterol measurement is highly sensitive for the detection of early and advanced atherosclerosis
Brazilian Journal of Medical and Biological Research. Publicado em: 2009-06
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17. Study of nuclear reactions of astrophysics interest through the trojan horse method / Estudo de reações nucleares de interesse astrofísico utilizando o método do cavalo de tróia
Nuclear Astrophysics is the key to explain, among other things, the production of energy in stars, stellar evolution and the synthesis of chemical elements and isotopes in the Universe. In such cases, nuclear reactions are the main structure, where cross sections and reaction rates must be determined with reasonable accuracy in the laboratory. Because the ex
Publicado em: 2009
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18. Extrapolação espectral na restauração de imagens tridimensionais de microscopia ótica de fluorescência
The study of living cells, isolated or in tissues, in several applications, requires the use of microscopy techniques. The fluorescence microscopes are specially important for making possible images with enhancement of specific structures and detection of biological processes. However, microscopes, like other optical systems, corrupt images so that many deta
Publicado em: 2008
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19. Padronização dos Radionuclídeos 201Tl e 55Fe em sistema de coincidências 4(PC)-NaI(Tl) / STANDARDIZATION OF 201Tl AND 55Fe RADIONUCLIDES IN A 4(PC)-NaI(Tl) COINCIDENCE SYSTEM
In the present work the procedure for the standardization of radionuclides using the 4(PC)-NaI(Tl) coincidence system was developed. The radionuclides selected were 201Tl, used in nuclear medicine, and 55Fe primary standard source, used for x-ray spectrometers calibration. The 4(PC)-NaI(Tl) is composed of a 4 proportional counter operated at 0.1MPa coupled t
Publicado em: 2008
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20. Sistema de previsão imediata da precipitação: o hydrotrack / A rainfall nowcasting system: the hydrotrack
The knowledge of convective system evolution is of fundamental importance for understanding weather and climate, particularly in the tropics, and it is essential to improve forecasting of these systems to reduce vulnerability to extreme weather damage. The identification of predictor parameters of the evolution of convective system, based on its previous evo
Publicado em: 2008
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21. Behavior of different piles, conducted in diabasic soil, submited to uplift efforts / Estudo do comportamento a tração axial de diferentes tipos de estacas em solo de diabasio da região de Campinas/SP
This research presents the behavior of different kinds of piles conducted in unsaturated diabasic porous soil submitted to uplift forces. For this research there were built the follow piles: three instrumented root piles with 12m length and 410mm of nominal diameter, one root pile with nominal diameter of 310mm and 23m length, two metallic piles type W250x32
Publicado em: 2008
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22. Proposta conceitual para a regionalização de vazões / Conceptual proposal for the hydrologic regionalization
The knowledge water availability through hydrographic net is fundamental to management water resources concession use rights. Normally this knowledge is restrict to the places where exist fluviométrica measurement station. Hydrologic regionalization is a technical tool to supply lack of information where there are few or no data availability. From a socio-
Publicado em: 2008
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23. Modified method for obtaining the critical cooling rate for vitrification of polymers
Due to the relevance of the critical cooling rate, Rc, for glasses, Barandiarán and Colmenero (BC) developed a method for calculating Rc as a function of the crystallization temperature on cooling obtained from thermal analysis. The critical cooling rate is obtained by the extrapolation method to conditions of infinity undercooling. However, for polymers, t
Materials Research. Publicado em: 2007-12
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24. The penalty/modified barrier Lagrangian function method / O método da função Lagrangiana barreira modificada/penalidade
Neste trabalho propomos uma abordagem que utiliza o método de barreira modificada/penalidade para a resolução de problemas restritos gerais de otimização. Para isso, foram obtidos dados teóricos, a partir de um levantamento bibliográfico, que explicitaram os métodos primal-dual barreira logarítmica e método de barreira modificada. Nesta abordagem,
Publicado em: 2007