Electric Filters
Mostrando 1-12 de 19 artigos, teses e dissertações.
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1. Electromagnetic interference reduction by dynamic impedance balancing applied to biosensors
INTRODUCTION: Electromagnetic interference caused by electric power lines adversely affects the signals of electronic instruments, especially those with low amplitude levels. This type of interference is known as common-mode interference. There are many methods and architectures used to minimize the influence of this kind of interference on electronic instru
Rev. Bras. Eng. Bioméd.. Publicado em: 2013-09
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2. Geração distribuída usando geradores síncronos trifásicos / Distributed generation using three-phase synchronous generators
Os geradores síncronos trifásicos são atualmente os mais utilizados em geração de energia elétrica em grande escala no mundo todo. Na geração de energia elétrica em pequena escala, geralmente como geração distribuída, ligada à rede de distribuição em média tensão ou até mesmo em baixa tensão, eles tem sido muito usados devido à sua princi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 11/08/2011
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3. Técnicas de equalização de canais de comunicação aplicadas a imagens. / Equalization techniques for communications channels applied to images.
O objetivo da desconvolução autodidata de imagens é reconstruir a imagem original a partir de uma imagem degradada sem usar informação da imagem real ou da função de degradação. O processo de reconstrução é crítico em aplicações em que a imagem original ou suas características estatísticas não são conhecidas. Fazendo um mapeamento da image
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/04/2011
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4. Projeto de filtros tipo "só-pólo" para malhas de sincronismo de fase de alta frequência. / Design of all-pole filters for high frequency phase locked loops.
The evolution of communication systems is discussed, with emphasis on optical technology. Special consideration is given to the continuous need for increasing the capacity of such systems, and the impact over future optical communication. In view of the great demands imposed over the capacity of future optical systems, an overview is presented of two recent
Publicado em: 2010
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5. Estudo sobre conservação de energia eletrica e qualidade de energia eletrica / Study about energy economy and power quality
Este trabalho trata de dois temas de grande relevância, principalmente nos últimos anos, na área de energia elétrica: a conservação e a qualidade da energia elétrica. Os estudos são baseados em dados de grandezas elétricas coletados por equipamentos de monitoração e gerenciamento de energia instalados em pontos distintos do Campus da Universidade
Publicado em: 2009
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6. Produção de forragem verde em sistema hidropônico usando esgoto tratado
In the urban areas of the cities a larger problem of destiny of effluents of the treatment stations is verified due to the junction of the sewages in great volumes. This way the hidroponic cultive becomes important, for your intensive characteristic, as alternative of reuse. This work presents as objective the improvement of the relation hidric-nutritious of
Publicado em: 2008
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7. Estudo do mecanismo eletroforético de coleta na filtração de aerossóis.
Previous works have shown that the presence of electrostatic forces in particles significantly affect the performance of a filter, both increasing collection efficiency and reducing pressure drop. Recently, in the Environmental Control research group of the Chemical Engineering Department of UFSCar, Rodrigues (2005) have studied the filtration of electric ch
Publicado em: 2007
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8. Comparação de ferramentas para modelamento de indutores na tecnologia CMOS. / Comparison of tools for inductors model in the CMOS technology.
Two modeling tools for integrated planar square inductors and one software implementing analytical relations, were studied and analyzed, to determine which is the most appropriate, that is, the tools that will supply the closest results to experimental measurements with, lower costs, higher speed, etc. Integrated planar inductors present severe limitations i
Publicado em: 2007
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9. Síntese de Filtros de Microondas Compactos com Respostas Elípticas e Pseudoelípticas utilizando a Variável Transformada Z / Synthesis of Compact Microwave Filters with Elliptic and Pseudo-elliptic Response using the Transformed variable Z
This research work develops new analysis techniques and synthesis for the conception of microwaves filters with elliptic or pseudo-elliptic frequency response. The application of these high frequency filters is in the current systems of wireless communications. The fast development of these systems presents challenges, in filters design, such as, considering
Publicado em: 2006
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10. Filtros de spin não-magneticos controlados por voltagem / Voltage controlled non-magnetic spin filters
The aim of this work was to study the transport properties of nonmagnetic semiconductor heterostructures: double barrier diodes ? DBD. Our attention was focused on the carrier spin polarization through the structure. First we present the phenomenology behind the carrier transport and how the DBD can act as a spin filter. In the sequence, we present the exper
Publicado em: 2006
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11. Development and application of shunt active filters for three-phase four-wire systems / Estudo e aplicação de filtros ativos paralelos para sistemas trifasicos com quatro fios
Electricity power quality has gained increased importance in the past few years. The growing number of power electronicsbased loads has created a preoccupation about harrnonic distortion in electric systems. Electricity power quality is an important issue both for energy utilities and consumers. Harrnonic poIlution may cause severe problems to electricity ut
Publicado em: 2005
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12. Estudo do processo de eliminação de "etch-channels" por eletrodifusão em quartzo sintetico
The sweeping in synthetic quartz is a process of impurity diffusion performed at temperatures of about 500°C with the application of an intense electrical field. The electrodiffusion in synthetic quartz (sweeping), by using for example AG atoms in air, has an increasing technological interest as it makes the material highly resistant to the formation of etc
Publicado em: 1998