Electromagnetics
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. Design of Microwave Absorbers using Improvised Particle Swarm Optimization Algorithm
Abstract Particle Swarm Optimization (PSO) algorithm has been applied in electromagnetics to design microwave absorbers. Generally, microwave absorbers are used for absorbing the electromagnetic radiation caused due to numerous electronic equipments and is being extensively used in stealth technology. The main aim of this paper is to find and analyze the min
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2018-06
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2. 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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3. Single layer cylindrical and helicoidal coil with voids between successive turns electromagnetic field calculation to be used in superconductor current limiter simulator for design purpose
A very accurate mathematical method, named Helicoidal Method, to calculate the flux density vector B produced by the current circulating in the resistive single-phase superconductor electrical current limiter (RSCL) coils, at any point of the its whole space, using the Biot-Savart’s Law is presented in this paper. It is very important to remember that thes
Publicado em: 2011
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4. Fast single layer cylindrical and helicoidal coil with voids between turns electromagnetic field calculation to be used in superconducting current limiter simulator for design purpose
This paper presents a mathematical method to quickly calculate the flux density vector B produced by the current circulating in a resistive single-phase superconducting electrical current limiter (RSCL), at any point of its whole space, using the Biot-Savart’s Law. As the calculation using the exact form of the turns of each coil (single layer cylindrical
Publicado em: 2011
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5. Elementos finitos com resolução simplificada de sistemas de equações lineares para dispositivos fotônicos / Finite elements with simplified solutions of linear systems of equations for photonic devices
The Finite Element Method is one of the most popular numerical tools in electromagnetics. Implicit schemes require the solution of sparse linear equation systems, this step demands a lot of computational time. This work proposes alternatives enhancements to obtain better computational performance of such implicit schemes. This was made through the improvemen
Publicado em: 2010
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6. Localized beams in optical tweezers with conventional and metamaterial particles / Feixes localizados em pinças opticas com particulas convencionasi e metamateriais
In this thesis, we explore some applications of localized beams in FSO - Free Space Optics - and optical tweezers, greater emphasis been given to the second one. For FSO, we show that it is possible to choose the desired longitudinal intensity pattern by using optical elements adequately modeled in their phase functions: the axicons. In this way, these beams
Publicado em: 2009
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7. 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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8. Estudo da radiação eletromagnetica na cabeça humana considerando efeitos quirais / Study of the electromagnetic radiation on the human head considering chiral effects
This work shows a numerical model based on the finite-difference time-domain method, with the aim of analysing the characteristics of the Specific Absorption Rate, SAR, in a human-head, through a quiral modeling of Mawell?s equations. The formulation is expressed in terms of the electric and magnetic wave-fields, allowing to investigate possible changes in S
Publicado em: 2005
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9. Analise de dados geologicos, geofisicos e de sensoriamento remoto para geração de modelos prospectivos para a região de Serra Leste, Carajas (PA)
The Serra Leste region, located in the northeast portion of the Carajás Mineral Province (State ofPará, Brazil), hosts several mineral deposits and mineralisations that are related to different geological settings. The Companhia Vale do Rio Doce holds the majority of the property claims in the region and motivated by its prospective potential, the company
Publicado em: 2002