Wave Equation
Mostrando 1-12 de 162 artigos, teses e dissertações.
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1. Numerical Analysis and Approximate Travelling Wave Solutions for a Higher Order Internal Wave System
ABSTRACT In this work we focus on the numerical solution of a higher order bidirectional nonlinear model of Boussinesq type involving a nonlocal operator. Based on a von Neumann stability analysis for the linearized problem, an efficient and stable scheme for the nonlinear system is proposed. Our method is based on a numerical scheme known from the literatur
Trends in Computational and Applied Mathematics. Publicado em: 2022
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2. Rotational Solitary Wave Interactions over an Obstacle
ABSTRACT In this work, we investigate the propagation of rotational solitary waves over a submerged obstacle in a vertically sheared shallow water channel with constant vorticity. In the weakly nonlinear, weakly dispersive regime the problem is formulated in the forced Korteweg-de Vries equation framework. The initial value problem for this equation is solve
Trends in Computational and Applied Mathematics. Publicado em: 2022
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3. Electrochemical Determination of Trifluralin Herbicide Using Silver Solid Amalgam Electrode: Application in Fresh Food Samples
This paper reports the use of polished silver solid amalgam electrode (p-AgSAE) allied to square wave voltammetry (SWV) in the development of a simple, sensitive, fast and green electroanalytical methodology for the trifluralin herbicide determination in fresh food samples. The experimental (supporting electrolyte and potential and time accumulation) and vol
J. Braz. Chem. Soc.. Publicado em: 2021-07
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4. Unified comprehension of the kinetics of isothermal ceramic processes under field-free and resonant wave-field conditions
Abstract This paper proposes a unified comprehension of the isothermal ceramic process kinetics stemming from mesoscopic irreversible thermodynamics. Accordingly, a unified process kinetic equation (UPKE) is derived, which predicts that the global isothermal process rate of any ceramic process is, in general, nonlinearly related both to its activation energy
Cerâmica. Publicado em: 2021-03
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5. Oscilador Harmônico Duplo difuso
Resumo A descrição do comportamento de um sistema difuso, linear e não-linear, pode ser tratada através da equação de Fokker-Planck. Esta equação tem despertado grande interesse de pesquisadores por sua boa adaptação a diferentes sistemas, tanto clássicos como quânticos. Neste trabalho, utilizamos a equação de Fokker-Planck para encontrar as pr
Rev. Bras. Ensino Fís.. Publicado em: 25/11/2019
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6. A smooth path to plot hydrogen atom via Monte Carlo method
Abstract In this paper, we show how to build a basic computer program using the Monte Carlo method to display the hydrogen atomic orbitals. For this, in a heuristic way, we applied a von Neumann acceptance-rejection method in simple problems of potential wells, and we end with the hydrogen orbitals representation. In this technique, we spread points uniforml
Rev. Bras. Ensino Fís.. Publicado em: 22/07/2019
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7. Simplified expressions for dynamic behavior of cylindrical shells uncoupled and coupled with liquids
Abstract The dynamic behavior of cylindrical shells is essential in many practical applications. These include in-vacuum and coupled vibrations of structures with contained fluids. Closed-form solutions are extremely complex since they involve many terms and algebraic operations that require numerical solvers. In this work, a simplified closed-form solution
Lat. Am. j. solids struct.. Publicado em: 22/07/2019
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8. Wave length and celerity downstream from a hydraulic jump
RESUMO Uma característica importante para a caracterização de uma onda é o seu período, ou seja, o intervalo de tempo correspondente a uma oscilação completa. Através do período da onda é possível estimar outras importantes características da onda, tais como o comprimento e a celeridade de uma onda. Neste estudo, são apresentados resultados de u
RBRH. Publicado em: 04/07/2019
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9. Rediscutindo Soluções Numéricas de Equações de Onda
Resumo Nesta contribuição, é nosso principal objetivo apresentar um método numérico de solução da equação de onda, seja esta de origem mecânica ou eletromagnética. Baseando-nos nesta solução, podemos avaliar o comportamento destas ondas sob diferentes aspectos e condições, visto que, as ondas eletromagnéticas conseguem se propagar no vácuo,
Rev. Bras. Ensino Fís.. Publicado em: 27/06/2019
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10. Esquema Explícito Semi-Analítico para a Solução da Equação da Onda Unidimensional com Condições de Contorno Naturais
RESUMO Este artigo aborda o desenvolvimento de um esquema explícito semi-analítico destinado à solução da equação da onda unidimensional não homogênea. Uma malha espaço-tempo foi construída através da relação incremental c Δ t = Δ x, de tal modo que volumes de controle foram formados a partir das retas características da referida equação
TEMA (São Carlos). Publicado em: 03/06/2019
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11. Clinical and functional variables can predict general fatigue in patients with acromegaly: an explanatory model approach
ABSTRACT Objective To evaluate whether hormonal profile, arterial function, and physical capacity are predictors of fatigue in patients with acromegaly. Subjects and methods: This is a cross-sectional study including 23 patients. The subjects underwent a Modified Fatigue Impact Scale (MFIS) assessment; serum growth hormones (GH) and IGF-1 measurements; pul
Arch. Endocrinol. Metab.. Publicado em: 25/04/2019
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12. Passive vibration control using a metaconcrete thin plate
Abstract We investigated the band structure of flexural waves propagating in a metaconcrete thin plate, consisting of a concrete matrix reinforced by steel inclusions coated by rubber in square and triangular lattices. We considered the classical Kirchhoff-Love thin plate theory. We also studied the influence of inclusion geometry - circular, square and rota
Cerâmica. Publicado em: 2019-01