Three Phase Networks
Mostrando 1-12 de 29 artigos, teses e dissertações.
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1. Evaluating management practices in horizontal cooperation SMEs networks: the Ecuadorian context
Resumo Pequenas e médias empresas (PME) desempenham um papel importante no crescimento econômico de um país e setor; é através da estratégia de cooperação que elas procuram incorporar-se à dinâmica da produtividade e competitividade permanente. Este artigo avaliou a aplicação de práticas de gestão em redes horizontais de PME do setor de lácteo
Gest. Prod.. Publicado em: 13/06/2019
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2. Sistemas inteligentes para monitoramento e diagnósticos de falhas em motores de indução trifásicos / Intelligent systems for faults monitoring and diagnosis in three-phase induction motors
The objective of this thesis consists of the implementation of intelligent systems for three-phase induction motors fault diagnosis and condition monitoring. Therefore, an experimental test stand for stator winding inter-turn short circuit faults, broken rotor bar in squirrel cage and, finally, defective wheel bearing has been designed. The main focus is to
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 11/04/2012
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3. Teoria de potência conservativa : uma nova abordagem para o controle cooperativo de condicionadores de energia e considerações sobre atribuição de responsabilidades / Conservative power theory : a new approach to cooperative control of power conditioners and considerations regarding to responsibility assignment
Considerando as mais variadas aplicações relacionadas aos sistemas elétricos modernos, um dos grandes desafios das últimas décadas têm sido a interpretação e controle dos fenômenos físicos através das chamadas teorias de potência. Aplicações relacionadas, por exemplo, com o projeto e controle de dispositivos e sistemas têm sido influenciadas p
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/03/2011
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4. Capacitor placement in primary and secondary distribution network including resonance constraints / Alocação de capacitores em redes de distribuição primárias e secundárias incluindo restrições de ressonância
Redes de distribuição de energia elétrica são continuamente expandidas de forma a atender novos consumidores mantendo padrões de qualidade adequados. Pelo lado do consumo, observa-se no decorrer dos últimos anos que as cargas residenciais, comerciais e industriais vêm sofrendo mudanças na forma de onda da corrente drenada da rede, com aumento evident
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/06/2010
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5. Fluxo de carga trifasico com modelagem de incertezas via função de pertinencia sinusoidal / Three-phase power flow with modelling of sinusoidal membership function
A fuzzy direct approach for unbalanced three-phase distribution load flow solutions was developed in this work. The special topological characteristics of distribution networks have been fully utilized to make the direct solution possible. Due to the distinctive solution techniques of the proposed method, the time-consuming LU decomposition and forward/backw
Publicado em: 2010
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6. Subconjunto de treinamento e critério de confiabilidade para Redes Neurais Artificiais de Domínio Real, Complexo e de Clifford
The use of Artificial Neural Networks (ANN) Multilayer Perceptrons (MLP) Backpropagation (BP) for regression is done in three phases: training, validation and testing. This research proposes a methodology to approach two aspects of these phases: 1st) to estimate a parameter to confront the accuracy of the ANN output classifying those which can be considered
Publicado em: 2009
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7. Calculo dos parametros de linhas de transmissão trifasicas atraves das tensões e correntes em seus terminais / Calculation of parameters of thress-phase transmission lines through voltages and currents in their terminals
The objective of this work is to calculate the longitudinal and transversal transmission line parameters using phase currents and voltages. Developed equations are used, in the modal domain, considering current and voltages found between a line terminal and an open line terminal, and a short-circuit terminal. . Initially, the basic transmission line theory i
Publicado em: 2009
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8. Evaluación de la adherencia de uniones adhesivas metálicas con adhesivos epoxídicos modificados
In this work the adhesive properties of epoxy resins based on diglycidyl ether of bisphenol A have been evaluated. The epoxy resin was modified with butadiene and acrylic copolymers to obtain toughened adhesives. The aliphatic primary amines triethylenetetramine, N-(2-aminoethyl)piperazine and isophorone diamine were investigated as curing agents. The adhesi
Polímeros. Publicado em: 2008-03
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9. Prediciton of high-pressure vapor liquid equilibrium of six binary systems, carbon dioxide with six esters, using an artificial neural network model
Artificial neural networks are applied to high-pressure vapor liquid equilibrium (VLE) related literature data to develop and validate a model capable of predicting VLE of six CO2-ester binaries (CO2-ethyl caprate, CO2-ethyl caproate, CO2-ethyl caprylate, CO2-diethyl carbonate, CO2-ethyl butyrate and CO2-isopropyl acetate). A feed forward, back propagation n
Brazilian Journal of Chemical Engineering. Publicado em: 2008-03
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10. DDAN: A distributed directory for ambient networks / DDAN: A distributed directory for ambient networks
Ambient Networks (AN) were designed with the goal of establishing the interoperability between different types of networks. This interoperability aims to attend the services requested by users, independently of their current location, type of network and access technology. The Project is motivated by futuristic scenarios which make the technology more and mo
Publicado em: 2008
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11. Contributions to projection pursuit learning / Contribuições para o aprendizado por busca de projeção
The production of parsimonious models is a common demand on a wide variety of engineering problems, as in the design of embedded systems. Constructive algorithms for supervised learning have shown to be effective methodologies for the synthesis of parsimonious artificial neural networks, with high levels of accuracy and generalization capability, though requ
Publicado em: 2008
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12. Three-phase generalized state estimation / Estimação de estado generalizada trifasica
Since its introduction in 1969 by Fred C. Schweppe, J. Wildes and D. Rom, the power system state estimation has been widely studied. The state estimation is evolving to a more detailed modeling, which considers state variables not commonly used in bus/branch system modeling. A generalized state estimation model, in which switches and circuit breakers are rep
Publicado em: 2007