Maxwell S Equations
Mostrando 1-12 de 14 artigos, teses e dissertações.
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1. Pseudo-Analytical Modeling of Tilted-Coil Antennas in Anisotropic Geophysical Formations
Abstract In this paper we present an efficient mode-matching technique to analyze tilted-coil antennas in anisotropic geophysical formations. In this problem, a number of coil antennas with arbitrary relative tilt angle with respect to the symmetry axis are used to radiate electromagnetic fields in a cylindrically layered medium comprised of a metallic mandr
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2017-03
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2. Spectral Method for Localization of Multiple Partial Discharges in Dielectric Insulation of Hydro-Generator Coils: Simulation and Experimental Results
Abstract A methodology based on spectral analysis for localization of multiple partial discharges in dielectric region of hydro-generator coils is proposed. This pinpointing of multiple discharges aims to provide means for performing diagnosis of insulating regions of the coil. A numerical model of the structure was developed by using the finite-difference t
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2016-09
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3. Os elementos finitos no estudo de eletromagnetismo utilizando os Software Gmsh/GetDP / The finite element method in electromagnetics study using the software Gmsh/GetDP
The aim of this master thesis is to study and develop two-dimensional and three-dimensional mathematical models, taking into account Maxwell s equations, the laws of material behavior and boundary conditions. Moreover, have discretization fields by finite element method using the Galerkin approach for electromagnetic analysis, and particularly problems of el
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/02/2012
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4. Formulações equivalentes da lei de Faraday / Equivalent formulations of Faraday´s law
Neste trabalho é dada uma prova de equivalência entre diferentes formas de se escrever a lei de Faraday. a forma integral e a diferencial. Nosso objetivo é esclarecer alguns pontos relevantes da prova dessas equivalências que são normalmente apresentadas nos livros textos de Física apenas para casos muito particulares. Aqui apresentamos a derivação d
Publicado em: 2010
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5. Propagação não linear de pulsos em estruturas 1D com band gap fotonico / Nonlinear pulse propagation in one-dimensional photonic band gap structures
The interaction of ultrashort optical pulses with photonic band gap materials has been studied by considering light propagation through one-dimensional photonic band gap structures, composed of a periodic multilayer stack of dielectric materials whose unitary cell consists of a pair of layers with different refractive indices n1and n2, respectively. One of t
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/08/2009
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6. ANÁLISE NUMÉRICA DE SENSORES ELETROMAGNÉTICOS DE PROSPECÇÃO PETROLÍFERA UTILIZANDO O MÉTODO DOS VOLUMES FINITOS / NUMERICAL ANALYSIS OF ELECTROMAGNETIC WELL-LOGGING TOOLS BY USING FINITE VOLUME METHODS
O objetivo principal deste trabalho é o desenvolvimento de modelos computacionais para analisar a resposta eletromagnética de ferramentas de perfilagem LWD/MWD em formações geofísicas arbitrárias. Essa modelagem envolve a determinação precisa de campos eletromagnéticos em regiões tridimensionais (3D) complexas e, conseqüentemente, a solução de s
Publicado em: 2007
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7. Propagação de Campos Eletromagnéticos em Meios Materiais Finitos
In this thesis, the electromagnetism in material media is considered. It starts from the Macroscopic Maxwell Equations assuming that the fields have a temporal dependence that can be expressed by a Fourier transform. The conservation of the energy, linear momentum and angular momentum are studied from a general point of view. By taking the temporal average o
Publicado em: 2006
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8. Propagação de Campos Eletromagnéticos em Meios Materiais Finitos
In this thesis, the electromagnetism in material media is considered. It starts from the Macroscopic Maxwell Equations assuming that the fields have a temporal dependence that can be expressed by a Fourier transform. The conservation of the energy, linear momentum and angular momentum are studied from a general point of view. By taking the temporal average o
Publicado em: 2006
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9. AN ARCHITECTURE FOR PHOTOREALISTIC IMAGE SYNTHESIS BASED ON MONTE CARLO TECHNIQUES / UMA ARQUITETURA PARA SÍNTESE DE IMAGENS FOTORREALISTAS BASEADA EM TÉCNICAS DE MONTE CARLO
One of the main goals in computer graphics is to create photorealistic images, that is, images indistinguishable from the ones captured by a real camera, or, more ambitiously, images that cause the same sensation on the visual system of an observer looking directly at a scene. Applications include illumination design, architecture, virtual reality and the mo
Publicado em: 2006
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10. Uma nova implementação do efeito skin no modelo da linha de transmissão / A new implementation of skin-effect in trnamission line model
This thesis presents the development of a new and quite simple implementa-tion of skin-effect in electrical and signal transmission line model for skin-effect 1088 analysis and study in frequency-domain. Skin-effect 1088 is taken into account by formulating and solving Maxwell s wave equation as a function of the electrical field in the direction of propagat
Publicado em: 2005
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11. Modelamento e analise de guias dieletricos planares atraves do metodo FDTD
In this work a finite-difference time-domain method formulation to the analysis of propagation characteristics in bidimensional dielectric planar structures (slab waveguide and directional coupler) is presented. A direct solution of Maxwell s equations is searched, replacing the partial derivative enc1osed in the differential operators by finite differences.
Publicado em: 1998
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12. Simulação por elementos finitos da propagação escalar de feixes opticos
This thesis describes the computer modelling of a wide range of optical waveguides, for integrated optics applications. The modelling described here involves the numerical solution of suitable Maxwell wave equations, such as Helmholtz and Fresnel. Within this context, the Beam Propagation Method (BPM) ar marching methods, can be divided into two general kind
Publicado em: 1998