Analytic Solution
Mostrando 13-24 de 69 artigos, teses e dissertações.
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13. Numerical solution of the Falkner-Skan equation using third-order and high-order-compact finite difference schemes
We present a computational study of the solution of the Falkner-Skan equation (a thirdorder boundary value problem arising in boundary-layer theory) using high-order and high-order-compact finite differences schemes. There are a number of previously reported solution approaches that adopt a reduced-order system of equations, and numerical methods such as: sh
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2011-12
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14. Modelling of acid mine drainage (AMD) in columns
A model is proposed in this paper to describe the generation of acid mine drainage (AMD) in leaching columns. The model considers: (i) Water flow through the column, which is calculated using the 1 - D analytic solution of the Richards' equation assuming the existence of a similarity relationship between the water retention function and the water content pro
Brazilian Journal of Chemical Engineering. Publicado em: 2011-09
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15. Prescrição de singularidades analíticas de soluções de uma classe de campos vetoriais no toro / Prescribing analytic singularities for solutions of a class of vector fields on the torus
Seja L = PONTO\partial IND. t+ [a(t) + ib (t)] \partial IND. xum operador diferencial parcial agindo em distribuições definidas no toro bidimensional T POT. 2; onde a; b : T POT. 1SETAR são funções analíticas reais. Suponhamos que L não ée globalmente analítico hipoelítico e b não é uma função identicamente nula. O objetivo principal deste trab
Publicado em: 2011
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16. Accuracy of analytical-numerical solutions of the Michaelis-Menten equation
It is the aim of this paper to investigate a suitable approach to compute solutions of the powerful Michaelis-Menten enzyme reaction equation with less computational effort. We obtain analytical-numerical solutions using piecewise finite series by means of the differential transformation method, DTM. In addition, we compute a global analytical solution by a
Computational & Applied Mathematics. Publicado em: 2011
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17. UTILIZAÇÃO DA METODOLOGIA AHP PARA ALOCAÇÃO DE EQUIPAMENTOS TELECOMANDADOS EM SISTEMAS DE DISTRIBUIÇÃO PARA MELHORIA DA CONFIABILIDADE / USE FOR AHP METHODOLOGY FOR ALLOCATION OF REMOTELYCONTROLLED DEVICES IN POWER DISTRIBUTION SYSTEMS FOR INCREASE RELIABILITY
In power utilities the subject reliability is a permanent worry. In this new context, some solutions have been developed and researched to an alternative to improve the performance on service restoration when there are consumers without power supply. Among possible solutions the installation of remotely-controlled switches represents a solution that has been
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/09/2010
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18. Analytic solution for the quaternionic barrier / Solução analitica para potenciais quaternionicos tipo barreira
O objetivo principal deste trabalho é estudar a equação de Schrödinger para um potencial quaterniônico tipo barreira. A solução analítica encontrada permite comparar qualitativamente as diferenças entre a mecânica quântica complexa e a mecânica quântica quaterniônica. Antes de apresentar a solução analítica da barreira, para um melhor entend
Publicado em: 2010
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19. Separation of l-tryptophan present in an aromatic amino acids mixture in a four-column simulated moving bed: experimental and simulation studies
An experimental and theoretical study is presented for the fractionation of L-Tryptophan (Trp) from L-phenylalanine (Phe) and L-tyrosine (Tyr). A Simulated-Moving Bed (SMB) with four-column system was tested, and the results are presented as effluent histories of the raffinate and extract ports. L-phenylalanine and L-tyrosine were recovered as major products
Brazilian Journal of Chemical Engineering. Publicado em: 2009-09
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20. Numerical simulation of solute trapping phenomena using phase-field solidification model for dilute binary alloys
Numerical simulation of solute trapping during solidification, using two phase-field model for dilute binary alloys developed by Kim et al. [Phys. Rev. E, 60, 7186 (1999)] and Ramirez et al. [Phys. Rev. E, 69, 05167 (2004)] is presented here. The simulations on dilute Cu-Ni alloy are in good agreement with one dimensional analytic solution of sharp interface
Materials Research. Publicado em: 2009-09
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21. About the theory on transformations of surfaces with constant curvature / Sobre a teoria das transformações de superfícies de curvatura constante
The theory on transformations of surfaces with constant curvature begins, in the late nineteen century, with the article [3] of A.V. Bäcklund and, after, received important contributions from various geometricians, among others, L. Bianchi and C. Guichard (see, for example, [5, 6, 7, 17]). In this dissertation we outline some of the most important results o
Publicado em: 2009
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22. Self-medication: initial treatments used by patients seen in an ophthalmologic emergency room
OBJECTIVE: This study seeks to identify practices of self-medication in the treatment of ocular emergencies. We examine patients' use of both homemade preparations and manufactured products before seeking specialized care. MATERIALS AND METHODS: We conducted a cross-sectional analytic survey of consecutive patients seen in the ophthalmology emergency room of
Clinics. Publicado em: 2009
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23. Theoretical observational study and numerical of soil temperature in Maceió -AL / Estudo observacional teórico e numérico da temperatura do solo em Maceió-AL.
The solution of a differential parcial parabolic equation of the Heat Flow on the Soil allows to simulate temperatures along a specific profile. For that, it is necessary to work with the soil analytical solution, but this solution is too complex for certain field situation. For this reason one of the methods of working soil temperature simulation are the ca
Publicado em: 2009
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24. Desenvolvimento de metodologia eletroanalítica para a determinação de cetoconazol em formulações farmacêuticas utilizando eletrodo de pasta de carbono modificado hemina.
In this work electrochemical studies are broached as well the development of an analytical methodology to determinate ketoconazole in pharmaceuticals formulations with the help of electrode of carbon paste was modified with hemin. The tests were carried out in solution tampão Britton-Robinson (BR) in pH 2, with an electrode compounded by 50% of carbon past
Publicado em: 2009