Scaling Laws
Mostrando 1-12 de 31 artigos, teses e dissertações.
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1. Scaling Symmetries and Conservation Laws for Variable-coefficients Nonlinear Dispersive Equations
RESUMO. Simetrias de escala surgem em diferentes ramos da física e abordagens baseadas em simetria são poderosas ferramentas para estudar modelos invariantes por escala, pois podem fornecer leis de conservação que não são óbvias por inspeção. Nessa perspectiva, a classe de equações dispersivas não-lineares com coeficientes variáveis vc K ( m ,
TEMA (São Carlos). Publicado em: 13/12/2019
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2. INFLUENCE OF THE MODEL SCALE ON HYDRODYNAMIC SCALING IN CFB BOILERS
Abstract The paper presents the results of experimental verification of the simplified set of scaling parameters for which the particle density as well as the cold model length scale may be chosen independently. The tests were carried out on two large scale 1/10 and 1/20 geometrically similar cold models of the Lagisza 966 MWth supercritical CFB boiler. The
Braz. J. Chem. Eng.. Publicado em: 2016-12
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3. Estimativa de expoentes críticos em Percolação
In Percolation Theory, functions like the probability that a given site belongs to the infinite cluster, average size of clusters, etc. are described through power laws and critical exponents. This dissertation uses a method called Finite Size Scaling to provide a estimative of those exponents. The dissertation is divided in four parts. The first one briefly
Publicado em: 2010
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4. Caracterização de filmes finos de CdTe por meio de teoria de escala anômala / Characterization of CdTe thin films using anomalous scaling theory
Filmes de telureto de cádmio crescidos sobre substratos de vidro recobertos com oxido de estanho dopado com flúor (TCO) foram estudados usando a teoria de escala dinâmica proposta por Lopez et al. [Phys. Rev. Lett. 84, 2199 (2000)]. As amostras foram crescidas por Ferreira et al. [Appl. Phys. Lett. 88, 244102 (2006)] usando a técnica de epitaxia por pare
Publicado em: 2010
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5. Influência das leis de escala sobre a dinâmica de populações
É bem conhecido que a formulação de equações para a dinâmica de uma população pode ser obtida com base na evolução espaço-temporal das espécies e suas interações. Por outro lado, quando olhamos as populações a partir de um ponto de vista microscópico, isto é, a partir dos seus indivíduos, esses modelos têm descartado um importante element
Publicado em: 2010
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6. Avalanches neuronais durante o ciclo sono-vigÃlia de ratos
Neuronal avalanches are spatiotemporal patterns of neuronal activity that occur spontaneously in supercial layers of the mammalian cortex under various experimental conditions. Previous studies in brain slices and cultured cells have shown that the distribution of sizes P(s) of neuronal avalanches obeys a power law relationship: P(s) Â sÂa , with exponent
Publicado em: 2009
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7. DeterminaÃÃo dos parÃmetros de uma seÃÃo de testes para o pressurizador do reator nuclear IRIS
An integral, modular and medium size nuclear reactor, known as IRIS, is being developed by Westinghouse and by research centers. IRIS is characterized by having most of its components inside the pressure vessel, eliminating the probability of accidents. Due to its integral configuration, there is no spray system for boron homogenization, which may cause powe
Publicado em: 2008
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8. MODELO ESTOCÁSTICO PARA EVOLUÇÃO DA DIVERSIDADE LINGÜÍSTICA EM RELEVOS CORRELACIONADOS
The origins of the languages have been an issue of investigation and broad interest since ancient times, and recent advances in archeology, genetics and linguistics have been important to a better comprehension of the linguistic diversification. However, there is not a universal consensus concerning the evolution of this diversity. Some similarities among di
Publicado em: 2008
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9. Estudo do efeito da fragmentação do habitat sobre padrões de biodiversidade
Despite the complexity of factors that influence the growth and dispersion of individuals in species, some general patterns are observed in the study of ecosystems. One of these patterns is the relationship between the number of species and the size of the area occupied by these species (species-area relationship). This relationship is one of the oldest rule
Publicado em: 2008
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10. Scaling laws in PZT thin films grown on Si(001) and Nb-Doped SrTiO3(001) substrates
A dynamic scaling and kinetic roughening study was done on digitized atomic force microscope (AFM) images of Pb(Zr0.52,Ti0.48)O3 (PZT) thin films. The films were grown on Si(001) and Nb - SrTiO3(001) (STNO) substrates via rf-sputtering technique at high oxygen pressures at substrate temperatures of 600 ºC by varying the deposition time and keeping other gro
Brazilian Journal of Physics. Publicado em: 2006-09
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11. Injection of the tracers in petroleum reservoir: multiscale modeling and numerical simulation / Injeção de traçadores em reservatórios de petróleo: modelagem multi-escala e simulação numérica
The spatial variations in porous media (aquifers and petroleum reservoirs) occur at all length scales (from the pore scale to the reservoir scale) and are incorporated in the governing equations for multiphase flow problems on the basis of random fields (geostatistical models). As a consequence, the velocity field is a random function of space. The randomnes
Publicado em: 2006
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12. LOCAL ISOTROPY ASSUMPTION AND THE UNIVERSALITY OF THE KOLMOGOROV CONSTANT / A HIPÓTESE DE TURBULÊNCIA LOCALMENTE ISOTRÓPICA E A UNIVERSALIDADE DA CONSTANTE DE KOLMOGOROV
According to the Kolmogorov s fully developed turbulence theory established in 1941, there is an equilibrium range in which phenomenological quantities associated to the turbulence flow are described by laws of universal character. The main objection to this theory was given by Landau, who critized the universality of these laws arguing that an universal sta
Publicado em: 2006