Topology Control
Mostrando 13-24 de 97 artigos, teses e dissertações.
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13. Contribuições para a análise e simulação de redes ópticas: aspectos de Engenharia de Tráfego, restauração dinâmica e conversão de comprimentos de onda / Contributions for the analysis and simulation of optical networks: aspects of traffic engineering, dynamic restoration and conversion of wavelenghts
The Wavelength Division Multiplexing (WDM) technology as well as both the introduction of all optical OXCs (Optical Cross Connect) and OADMs (Optical Add/Drop Multiplexer) may provide the optical network with the networking function, i.e, the capacity to manipulate wavelengths in order to implement their routing. This possibility implies a new type of relati
Publicado em: 2009
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14. Estudos sobre a conectividade em Redes de Sensores sem fios: Análise de Plataformas e resultados de Percolação no Plano Contínuo.
Apresentamos a caracterização do raio de transmissão mínimo necessário para garantir conectividade, CTR (Critical Transmission Range), num cenário de controle de topologia em RSSF homogêneas e estacionárias. Dada a complexidade de se trabalhar com modelos analíticos, por meio de experiências Monte Carlo obtemos um estimador da distribuição do CTR
Publicado em: 2009
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15. IEC-61850: interoperability and interchangeability between supervision, control and protection equipment using data communication networks / IEC-61850: interoperabilidade e intercambialidade entre equipamentos de supervisão, controle e proteção através das redes de comunicação de dados
Data communication has always been considered as a critical factor in real time operation of electric power systems. This is due to the need for fast and accurate decisions at different locations, from power generation to the user interfaces. With the digital technology, measurement, signals and commands are encrypted into data packets that travels on the su
Publicado em: 2009
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16. Manufacturing constraints applied to the topology optimization method. / Restrições de manufatura aplicadas ao método de otimização topológica.
The design of a mechanical component is a very complex task, which includes constraints such as maximum weight and maximum stiffness, and also manufacturing constraints, associated with the manufacturing processes required at the shop floor. It is known that Topology Optimization (TO), despite of being a very effective and powerful method to obtain optimal s
Publicado em: 2008
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17. Generalized scalar modulation strategy for matrix converters / EstratÃgia de modulaÃÃo escalar generalizada para conversores matriciais
Power processors are devices capable to convert a set of voltages, with fixed amplitude and frequency, in other set, with controlled amplitude and frequency. The main function of these processors is to work as an adjustable power supply. The direct power converters are a class of power processors. They have significant advantages compared with the traditiona
Publicado em: 2008
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18. GeraÃÃo de trajetÃrias de estados por mapas auto-organizÃveis com topologia dinÃmica
Este trabalho apresenta um novo modelo de Rede Neural Artificial de Topologia DinÃmica chamado State Trajectory Generator (STRAGEN) capaz de gerar trajetÃrias de estados a partir do mapeamento do espaÃo de estados de um sistema. O modelo permite a utilizaÃÃo de diferentes critÃrios para a composiÃÃo de uma trajetÃria Ãtima de acordo com o domÃnio
Publicado em: 2008
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19. Methodology of production strategy optimization based on genetic algorithms / Metodologia de otimização probabilistica de estrategias de produção baseada em algoritmos geneticos
High levels of uncertainty and associated risks in the exploration and production of some oil fields suggest the use of probabilistic optimized production strategies. Therefore, an appropriate production strategy should be chosen considering various geological and economic scenarios. In this work, a new approach for the optimization is proposed where the pro
Publicado em: 2008
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20. A photovoltaic energy conversion system with current and voltage based compensations / Sistema de conversÃo de energia fotovoltaica com compensaÃÃo baseada em corrente e tensÃo
This work presents a new topology for grid connected photovoltaic generation systems. This new topology adds functionalities in such a way that the photovoltaic system also improves the power quality. General aspects about photovoltaic generation systems are presented and two important maximum power point tracking methods (Perturb and Observe and Incremental
Publicado em: 2007
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21. Dimensioning ad hoc networks : traffic and interference combined / Dimensionamento em redes ad hoc : trafego e interferencia combinados
Ad hoc networks are networks that operate without centralized control, whose nodes communicate through wireless links in a single or multihop way. A complex issue about ad hoc networks is the capacity estimation. The computation of how many transmissions the network can support ensuring a quality of service for its users is a difficult task due to two centra
Publicado em: 2007
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22. Modelagem e análise de desempenho dinâmico de complexos elétricos contendo centrais eólicas dotadas de geradores síncronos / Modeling and dynamic performance analysis of electric power systems containing wind installations equipped with synchronous generators
New generation resources, with low implantation and operation costs and that provoke the minimum possible impact to the environment, are undoubtedly focuses of attention to all the segments of the society. From this common sense, the alternative or renewable sources of energy, and particularly the wind, have certainly had a significant penetration in the com
Publicado em: 2007
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23. Dynamics and control of heat exchanger networks / Dinamica e controle de redes de trocadores de calor
Energy integration among chemical process streams can lead to quite complex heat exchanger networks (HEN) with difficulties in terms of controI. In this work HEN dynamics and steady state aspects were addressed with the aim of proposing a control strategy that minimizes utility consumption and satisfies imposed specifications. A steady state model of the HEN
Publicado em: 2007
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24. Modelagem e anÃlise de desempenho dinÃmico de complexos elÃtricos contendo centrais eÃlicas dotadas de geradores sÃncronos / Modeling and dynamic performance analysis of electric power systems containing wind installations equipped with synchronous generators
New generation resources, with low implantation and operation costs and that provoke the minimum possible impact to the environment, are undoubtedly focuses of attention to all the segments of the society. From this common sense, the alternative or renewable sources of energy, and particularly the wind, have certainly had a significant penetration in the com
Publicado em: 2007