Radial System
Mostrando 1-12 de 186 artigos, teses e dissertações.
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1. Radially Periodic Metasurface Lenses for Magnetic Field Collimation in Resonant Wireless Power Transfer Applications
Abstract In this paper, a new procedure and topology of magnetic metasurface lens are proposed for improving the performance of Resonant Wireless Power Transfer systems. Firstly, three subwave-length unit cells are optimized in order to get negative magnetic permeability in the same frequency, each one with a different refractive index, and they are experime
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2022
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2. A Computational Framework for Daily Power Flow Analysis Considering Photovoltaic Distributed Generation
Abstract In Brazil, the demand for the acquisition and installation of photovoltaic systems has grown exponentially and, with that, the importance of studies considering their effects on the distribution grids power flow also grows. Due to the intermittent nature of photovoltaic generation, it is important to approach the analysis in a discrete way, taking i
Braz. arch. biol. technol.. Publicado em: 25/11/2019
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3. Forças no sistema de referência acelerado de um pêndulo: estudo teórico e resultados experimentais
Resumo Neste trabalho realizamos, inicialmente, uma discussão teórica sobre as forças no sistema de referência acelerado de um pêndulo que oscila livre de resistência. Tal discussão propicia a afirmação de que, se um acelerômetro for fixado no centro de oscilação de um pêndulo, ele deverá registrar um valor variável sobre o eixo orientado radi
Rev. Bras. Ensino Fís.. Publicado em: 25/11/2019
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4. Experimental Thermal Analysis in Rotary Friction Welding of Dissimilar Materials
ABSTRACT: Rotary friction welding process (RFW) is one of the most used processes in the world for manufacturing bimetallic components that require high mechanical strength. All process occurs in solid state at temperatures below the melting point of the involved materials, having as the main bonding mechanisms the diffusion and mechanical mixture. The purpo
J. Aerosp. Technol. Manag.. Publicado em: 23/09/2019
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5. Influência dos tratamentos de termorretificação e furfurilação em propriedades tecnológicas de uma conífera
RESUMO O Pinus elliottii Engelm. possui uma vasta possibilidade de aplicações, porém, apresenta características indesejáveis às quais podem ser atenuadas com a adoção dos tratamentos de termorretificação e a furfurilação. Assim, este trabalho analisou a influência que os tratamentos de furfurilição e termorretificação exerceram em propriedad
Matéria (Rio J.). Publicado em: 16/09/2019
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6. Solução do átomo de hidrogênio usando Supersimetria
Resumo Nesse trabalho apresentamos a solução da equação de Schrödinger através de uma versão moderna do método de fatorização usando o formalismo da chamada Mecânica Quântica Supersimétrica. O sistema tratado é o átomo de hidrogênio e tanto a parte radial como a angular das coordenadas esféricas são tratadas com a metodologia apresentada. E
Rev. Bras. Ensino Fís.. Publicado em: 19/06/2019
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7. Efeito da Taxa de Resfriamento na Liga Ni80Cu20 via Dinâmica Molecular
RESUMO A simulação em Dinâmica Molecular (MD) é uma poderosa ferramenta para estudo de ligas amorfas nanométricas. Neste artigo, a MD foi empregada para o estudo da liga Ni80Cu20. As simulações foram realizadas com o código livre LAMMPS, em um sistema contendo 2.000 átomos com interação atômica dada pelo potencial de Finnis-Sinclair (EAM-FS). O a
Matéria (Rio J.). Publicado em: 20/05/2019
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8. Heat Treatment of Sintered Valve Seat Inserts
The characterization of sintered valve seat inserts (VSIs) after being subjected to different heat treatment operations has been carried out. The VSIs were obtained from three different alloys by mixing iron powder with AISI M3:2, AISI M2 high-speed steels, and AISI D2 tool steel. After sintering, the VSI were quenched in air followed by double tempering at
Mat. Res.. Publicado em: 02/08/2018
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9. Measurements of Medium Wave HD Radio Reception in a Dense Urban Region
Abstract This paper presents the results of measurements of medium wave received field strength, HD Radio audio quality and maximum coverage distances in a dense urban region. Analog AM and digital HD Radio signals broadcasting the same content were simultaneously transmitted in São Paulo, the largest city in Brazil. The received signal intensity and the re
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2017-09
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10. Pattern Identification on the Nonlinear Radial Motion of an Oscillating Spherical Bubble Using Neural Networks
Abstract The main goal of this article is to study the oscillatory motion of a spherical gas bubble immersed in a Newtonian liquid subjected to a harmonic pressure excitation. We use the classical Rayleigh-Plesset equation to study the radial motion of the bubble undergoing a forcing acoustic pressure field. The second order nonlinear ordinary differential e
Lat. Am. j. solids struct.. Publicado em: 2016-12
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11. Nonlinear Electromechanical Stability of a Functionally Graded Circular Plate Integrated With Functionally Graded Piezoelectric Layers
Abstract This research develops nonlinear electromechanical stability of a circular functionally graded plate integrated with functionally graded piezoelectric layers under compressive radial force. Geometric nonlinearity is considered in the strain-displacement relation using Von-Karman relation. The structure is loaded under mechanical and electrical loads
Lat. Am. j. solids struct.. Publicado em: 2015-09
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12. Study on radial suspension forces of bearingless permanent magnet slice motor based on accurate inductance model
An accurate mathematical model of radial suspension forces for a bearingless permanent magnet slice motor (BPMSM) is of great significance to levitate the rotor stably and to improve the control accuracy of radial suspension force. In this paper, after a brief introduction on the suspension principle of the BPMSM, the accurate inductance model of two sets of
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2014-12