Discrete Events Systems
Mostrando 1-12 de 15 artigos, teses e dissertações.
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1. Alternativas de tratamento da água de lastro em portos exportadores de minério de ferro. / Ballast water treatment alternatives in the iron ore ports exporting.
This thesis aims at making a technical and economic analysis of the ballast water treatment in Brazilian iron ore ports. Three distinct treatment alternatives were studied: (1) onshore ballast water treatment; (2) water desalination plant to ballast water treatment; (3) onboard ballast water treatment in shuttle tanker vessels operating in the mooring, where
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/03/2012
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2. Implementation of supervisory control in PLCs using high-level language / Implementação de controle supervisório em CLPs usando linguagem de alto nível
Hoje em dia a competitividade entre as empresas está cada vez maior. Em um sistema de produção, a eficácia, a velocidade e a flexibilidade são importantes, pois significam redução de custos. Os sistemas de automação atuais estão cada vez mais complexos, justificando a necessidade de programas de controle mais eficientes, sem erros e de fácil manut
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/02/2012
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3. Metodologia para implementação de controle supervisório modular local em controladores lógicos programáveis / Methodology for implementation of supervisory control local modular in programmable logic control
Currently, manufacturing automation has assumed an increasingly important role within the industry and the problems of automated control systems have become increasingly complex. Thus, the traditional use of empirical methods heavily base on the experience of the programmer can lead to inappropriate or ineffective solutions. In this case, the Supervisory Con
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/07/2011
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4. Aplicabilidade da simulação híbrida em sistemas logísticos. / Applicability of hybrid simulation in logistics systems.
A proposta do trabalho é criar um modelo de simulação híbrida capaz de representar um sistema logístico. Partindo de uma investigação bibliográfica conceitual das metodologias de simulação de eventos discretos e da metodologia de simulação contínua (System Dynamics) capaz de revelar suas características principais e seus potenciais de aplicabil
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/06/2011
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5. DinÃmica GeomorfolÃgica do Ambiente de Encosta em Brejo da Madre de Deus - PE: uma abordagem a partir da perspectiva morfoestratigrÃfica aplicada aos depÃsitos coluviais
This present research tried to evaluate the geomorphological dynamic of the elevated compartments of the Borborema Highlands prioritizing the occurrence of sedimentary deposits dated that were identified after a qualitative rising of the geomorphological features. The chosen area type was the district of Tabocas, in the municipal district of Brejo da Madre d
Publicado em: 2008
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6. O uso da simulação no suporte a implementação da estrutura de controle supervisório
Abstract: The growth of competitiveness in enterprises has forced them to reduce more the releasing time of their products. Consequently, the enterprise and academy s effort in providing techniques and tools for the reconfiguration of its systems is in force. A manufacturing system is a classical example of a Discrete-Event System (DES), for its dynamics dev
Publicado em: 2008
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7. Geologia e petrologia do prospecto GT-34 : evidência de metassomatismo de alta temperatura e baixa fO2, província mineral Carajás, Brasil
The GT-34 Prospect in the Carajás Mineral Province is located within older gneissmigmatite terrains (Xingu Complex). Sulfide mineralization is hosted by irregular bodies of brecciated rocks and/or orthopyroxene-amphibole bearing rocks outcropping among gneissic rocks. Distribution of sulfide-rich intervals form an irregular NE trend of about 1.5 km-long and
Publicado em: 2008
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8. Optical communication systems simulation based on discrete-events simulation / Simulação de sistemas de comunicação optica baseada em simulação a eventos discretos
This work aims to study the discrete event simulation applied to Optical Communication Systems, considering the physical layer. It is shown a way to model this kind of systems so that it can be simulated with discrete event simulation technique. It is shown that process orientation is suitable for this case. The architecture of the software, which implements
Publicado em: 2007
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9. Optical communication systems simulation based on discrete-events simulation / Analise de trafego, capacidade e proteção em redes de pacotes opticos com chaveamento fotonico
Neste trabalho investigamos o desempenho de redes ópticas avançadas, em particular redes de chaveamento de pacotes ópticos (Optical Packet Switching Network-OPSN), constituídos por arquiteturas com topologias em malha e nós ópticos sem armazenador. Utilizou-se distribuição de tráfego uniforme, na qual todos os nós geram a mesma quantidade de tráfe
Publicado em: 2007
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10. Modelagem e programação de sistemas a eventos discretos periodicos / Modelling and programming of periodic discrete events systems
A methodology to obtain a cyclic scheduling in Discrete Events Systems is proposed in this work. This methodology initializes with a Petri netmodeling a discrete events system functioning with periodic processing. The method identifieswhich are the nets that can be treaties by him. The tractable Petri nets will be decomposed in subnets identified by process,
Publicado em: 2006
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11. Modelagem e análise de sistemas supervisórios híbridos. / Modeling and analysis of hybrid supervisory systems.
Hybrid Supervisory Systems can be described as control systems with states that are represented by both discrete and continuous variables. Their dynamics are function of time and depend also on the occurrence of discrete events. The development of Hybrid Supervisory Systems can be divided in two phases. In the 1st Phase, a prototype-model for the Supervisory
Publicado em: 2004
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12. Graded bidirectional synaptic plasticity is composed of switch-like unitary events
Biological information storage events are often rapid transitions between discrete states. In neural systems, the initiation of bidirectional plasticity by all-or-none events may help confer robustness on memory storage. Here, we report that at CA3–CA1 hippocampal synapses, individual potentiation and depression plasticity events are discrete and heterogen
National Academy of Sciences.