Digital Prototype
Mostrando 25-36 de 65 artigos, teses e dissertações.
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25. STUDY, CONTROL AND IMPLEMENTATION OF THE PFC BOOST CONVERTER OPERATING IN MIXED CONDUCTION MODE / ESTUDO, CONTROLE E IMPLEMENTAÇÃO DO CONVERSOR BOOST PFC OPERANDO NO MODO DE CONDUÇÃO MISTA
This Master Thesis presents the study and proposes a digital control system applied to the PFC boost converter operating in mixed conduction mode. The motivation to this subject, a bibliographic review of the existing current control techniques and the objectives of this work are presented in the first chapter. The control system is composed of a current loo
Publicado em: 2009
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26. Estudo da capacidade de imageamento do protótipo do brazilian decimetric array (PBDA) / Study of the imaging capability of the prototype of brazilian decimetric array (PBDA)
O protótipo do Arranjo Decimétrico Brasileiro - BDA, é um arranjo unidimensional Leste-Oeste de 5 antenas de 4 m de diâmetro, com linhas de base de 18 a 216 m, operando na faixa de freqüências 1,2 - 1,7 GHz, com resolução temporal de ~105 ms e tem produzido desde o inicio das operações e de forma regular, franjas de visibilidade em seus 10 pares de
Publicado em: 2009
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27. Adaptação eletrônica de um leitor mecânico de coto, investigação e desenvolvimento de interface CAD
Devido aos avanços no processo de fabricação de próteses ortopédicas, a necessidade de uma melhor qualidade técnica na leitura da forma (i.e., com menos incertezas) da parte residual dos amputados tornou-se um desafio. Para superar esses problemas é necessário ser capaz de obter informações precisas da geometria do membro e, consequentemente, melho
Publicado em: 2009
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28. Análise de eficiência energética em sistemas de ar comprimido
The compressed air systems represent plot expressive of energy consumption of an industrial plant. However, the lack of an appropriate project and a regular maintenance causes reduction in the overall performance featuring a constant source of waste. This fact guided the subject of this dissertation research, which is directed towards the development and app
Publicado em: 2008
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29. Incubator of talents: a proposal for collaborative environment for development of educational software with focus on sustainability of collaborators. / Incubadora de talentos: uma proposta de ambiente colaborativo para desenvolvimento de software educacional com foco na sustentabilidade dos colaboradores.
We had born in an analog society and moved rapidly towards to a digital society, where the coexistence wins new ways and demand requires more professional experience. In this new society, the software becomes increasingly necessary, since this is a programming necessary for the functioning of most of the tools available today. There then emerge where develop
Publicado em: 2008
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30. Processamento de amostras fecais e desenvolvimento da tecnica de analises de imagens por computador, para o diagnostico das enteroparasitoses / Processing of samples feces and development of the technique of analyses of images for computer, for the diagnosis of the enteroparasitoses
In the present study, we investigated on fecal sample processings, development and evaluation of a computer system for parasite image analysis. We observed that the fecal processing step was critical, but, essential for providing clean parasite structures, with reduced amount of fecal microdebris, to the system of computer analysis. Several conventional para
Publicado em: 2008
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31. Digital TV transmission monitoring system for heterogeneous converging networks. / Sistema de monitoramento de transmissão de TV digital em redes convergentes heterogêneas.
The great evolution in the telecommunication systems related to the transmission of multimidia contents in the data communication networks and TV transmission, demands management solutions in which regards quality of end-to-end services. Taking this scenario into consideration, it is proposed in this work the definition and implementation of a solution to mo
Publicado em: 2007
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32. AnÃlise, projeto e implementaÃÃo de reatores eletrÃnicos para acionamento de lÃmpadas de alta intensidade em descarga "AID", controlados por circuitos de lÃgica reconfigurÃvel "FPGA"
Programmable logic devices were introduced about fifteen years ago and nowadays they are used in areas like Telecommunications, Instrumentation and more recently Power Electronics. This work presents the application of an FPGA device in the control of a ballast circuit for driving high intensity discharge lamps. The electronic ballast presents improvements r
Publicado em: 2007
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33. Desenvolvimento e avaliação de um protótipo classificador de tábuas usando técnicas de visão artificial / Development and evaluation of a prototype for sawn wood classification using artificial vision technics
Much effort has been expended by researchers to apply automation to productive processes. The sawn wood industry has a promising place in this activity, because lumber is a raw material for products with increasing demand, such as furniture, which requires high quality pieces. The quality of the lumber is determined by the defects it presents and some charac
Publicado em: 2007
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34. DHA :um esquema de acordo de chaves baseado em matrizes para o protocolo Diffie-Hellman
In this work is proposed an annonimous cryptographic key agreement protocol by secure way based on Diffe-Hellman protocol. Actually key agreement protocols like Diffe-Hellman, ElGamal and other work with modular exponentiation operations and the complexity of such protocols are based on apparent diffcult to deal DLP (Discrete Logarithm Problems). The propose
Publicado em: 2007
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35. Sistema supervisorio de gestão de multiplas fontes de suprimento para aplicações em veiculos eletricos / Energy management supervisory system of multiple power sources for electric vehicle applications
This work introduces an Energy Management strategy, for electrical vehicle applications, based on a fuzzy logic supervisory system that is able to combine three different power supply sources, i. e., fuel cell, battery and supercapacitor. The supervisory system coordinates the power flow between the power sources so that the system is able to provide high po
Publicado em: 2007
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36. PrediÃÃo de palavras baseada em modelos ocultos de Markov / Word prediction based on hidden Markov models
Social inclusion search has been promoting the technology development extending people with special needs computerâs use. Amongst the innumerable auxiliary tools, words prediction is an important accelerator that diminishes the number of actions to be executed and, consequently, time and effort to do it. Word anticipation in a text being typed, called word
Publicado em: 2007