Kinematic Wave
Mostrando 1-10 de 10 artigos, teses e dissertações.
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1. Comparação de modelos hidrodinâmicos simplificados de propagação de vazão em rios e canais
This work has identified, tested and improved simplified flood routing models to verify the advantages and disadvantages presented. The solutions provided by these models were tested by using a full hydrodynamic model considered in this work as an ideal result. The simplified hydrodynamic models used were: A variable parameter kinematics wave model, the Musk
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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2. VARIAÇÕES ESPACIAIS DE PROPRIEDADES FÍSICAS DO REMANESCENTE DE SUPERNOVA RCW 103
Since the observation of the supernova event SN 1987A, observational research on supernova and supernova remnants, including the ones on the optical spectrum, has been much explored. However, most of these studies have been limited to present integrated or punctual data from extragalactic or galactic supernova remnants. The present work has the objective of
Publicado em: 2008
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3. As equações da onda imagem para remigração em meios elipticamente anisotropicos / The image wave equations for remigration in elliptically anisotropic media
The image-wave equations for the problems of depth and time remigration in elliptically anisotropic media are second-order partial differential equations similar to the acoustic wave equation. The propagation variable is the vertical velocity or the medium ellipticity. These differential equations are derived from the kinematic properties of anisotropic remi
Publicado em: 2007
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4. Migration in depth pre-piling up using the cinematic attributes of the piling up for surface of common reflection / Migração em profundidade pré-empilhamento utilizando os atributos cinemáticos do empilhamento por superfície de reflexão comum
The Common-Reflection-Surface (CRS) stack is a new seismic processing method for simulating zero-offset (ZO) and common-offset (CO) sections. It is based on a second-order hyperbolic paraxial approximation of reflection traveltimes in the vicinity of a central ray. For ZO section simulation the central ray is a normal ray, while for CO section simulation the
Publicado em: 2007
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5. Comparative studies between the kinematic and diffusive waves on the flood routing analisys, in function of hydraulics parameters of the watershed / Estudo Comparativo dos Modelos da Onda Cinemática e da Onda Difusiva na Análise de Propagação de Cheias, em Função dos Parâmetros Hidráulicos da Bacia
Os Modelos da Onda Cinemática e da Onda Difusiva foram aplicados em um rio natural, para estudar a propagação de uma onda de cheia neste corpo hídrico. Esses modelos são derivações do Modelo da Onda Dinâmica, a partir de simplificações nas Equações de Saint Venant, onde alguns termos são desprezados. No processo de solução das equações difer
Publicado em: 2006
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6. Distribuição espacial e temporal do escoamento superficial em bacias hidrográficas / Spatial and temporal distribution of superficial flow in hydrographic basins
A necessidade de conservação dos recursos hídricos induz os pesquisadores à busca de um melhor entendimento e interação do processo dinâmico de transformação que envolve todo o ciclo hidrológico. A escassez de estações meteorológicas e fluviométricas, associada às grandes dimensões das bacias hidrográficas do país, impossibilitam a quantifi
Publicado em: 2005
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7. Chaos and Unpredictability in the Vibration of an Elasto-Plastic Beam
This contribution discusses the nonlinear dynamics of a pin-ended elasto-plastic beam with both kinematic and isotropic hardening. An iterative numerical procedure based on the operator split technique is developed in order to deal with the nonlinearities in the equations of motion. Free and forced responses for harmonic sinusoidal and square wave excitation
Journal of the Brazilian Society of Mechanical Sciences. Publicado em: 2001
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8. Diffusion of inositol 1,4,5-trisphosphate but not Ca2+ is necessary for a class of inositol 1,4,5-trisphosphate-induced Ca2+ waves.
Combining a realistic model of inositol 1,4,5-trisphosphate (IP3)-induced Ca2+ oscillations with the diffusion of IP3 and buffered diffusion of Ca2+, we have found that diffusion of Ca2+ plays only a minor role in a class of agonist-induced Ca2+ wave trains. These waves are primarily kinematic in nature, with variable wavelengths and speeds that depend prima
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9. On the roles of Ca2+ diffusion, Ca2+ buffers, and the endoplasmic reticulum in IP3-induced Ca2+ waves.
We have investigated the effects of Ca2+ diffusion, mobile and stationary Ca2+ buffers in the cytosol, and Ca2+ handling by the endoplasmic reticulum on inositol 1,4,5-trisphosphate-induced Ca2+ wave propagation. Rapid equilibration of free and bound Ca2+ is used to describe Ca2+ sequestration by buffers in both the cytosol and endoplasmic reticulum (ER) lum
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10. Viscous, resistive magnetohydrodynamic stability computed by spectral techniques
Expansions in Chebyshev polynomials are used to study the linear stability of one-dimensional magnetohydrodynamic quasiequilibria, in the presence of finite resistivity and viscosity. The method is modeled on the one used by Orszag in accurate computation of solutions of the Orr-Sommerfeld equation. Two Reynolds-like numbers involving Alfvén speeds, length