Discrete Event Simulation
Mostrando 25-36 de 41 artigos, teses e dissertações.
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25. Modelo híbrido de otimização multiobjetivo para formação de células de manufatura / Hybrid multiobjective optimization model for manufacturing cell formation
O objetivo deste trabalho é propor um procedimento híbrido para a solução do problema de formação de células de manufatura com réplicas de máquinas. Constrói-se um modelo matemático de otimização multiobjetivo cujos valores das funções-objetivo são obtidos por meio da execução de um modelo de simulação de eventos discretos, o qual represe
Publicado em: 2008
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26. BALANCEO DE UN SISTEMA DE COSECHA MECANIZADO UTILIZANDO SIMULACIÓN DE EVENTOS DISCRETOS
ABSTRACT A mechanized harvest system was analysed, working in a radiata pine clear cut operation and compound by a feller buncher, a grapple skidder, a grapple processor and a three-wheeler. A Discrete - Event Simulation Model was built with the goal to balance the system. The mechanized wood processing was the bottleneck according to the time study results,
Ciênc. Florest.. Publicado em: 2007-10
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27. 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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28. Evaluation and selection method for discrete event simulation software dedicated to the analysis of logistic systems. / Método para avaliação e seleção de softwares de simulação de eventos discretos aplicados à análise de sistemas logísticos.
The discrete event simulation is one of the most powerful tools available for modeling and problem analysis. Frequently it is used for planning, designing and controlling complex systems in several segments. The logistic system area has also applied it extensively to analyse the logistic capacities, evaluate the impacts of changes in the productive processes
Publicado em: 2007
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29. Estudo das vulnerabilidades da arquitetura BitTorrent, ataques e contramedidas possíveis
BitTorrent is the most popular file sharing technology and associated with a significant fraction of the Internet traffic. Considering its importance and large scale adoption, the BitTorrent architecture should be robust and resistant to malicious peers. This dissertation is the first investigation in terms of vulnerabilities against BitTorrent architecture,
Publicado em: 2007
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30. Automatic dependent surveillance on air traffic control: risk assessment based on fluid stochastic Petri nets modeling. / Vigilância dependente automática no controle de tráfego aéreo: avaliação de risco baseada em modelagem em redes de Petri fluidas e estocásticas.
In last decades, the safety critical systems paradigm has changing to adapt itself to new necessities, such as costs reduction and productivity demand growth. In the Air Traffic System, those changes are ruled by CNS/ATM paradigm (Communication, Navigation, Surveillance / Air Traffic Management), based on new digital Technologies, mainly Satellites, applied
Publicado em: 2007
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31. Comparação de modelos com censura intervalar em análise de sobrevivência / Comparison of interval-censored models in survival analysis
Interval-censored results when survival times are not exactly known, knowing only that they occur in an interval. Grouped survival data are particular cases of intervalcensored when individuals are evaluated in the same time-intervals, causing a great number of ties. A common procedure for the analysis this type of data is to ignore the nature of interval-ce
Publicado em: 2007
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32. Análise dos estoques em processo de um sistema de produção de cabinas de caminhões com o uso da simulação de eventos discretos / The cabins storage system analysis from a commercial vehicle production system by the use of discrete event simulation
Essa dissertação tem como objetivo utilizar a simulação de eventos discretos na análise dos estoques seletivos em processo de cabinas, em uma montadora de veículos comerciais de grande porte instalada no Brasil. A análise e a redução desses estoques seletivos são desejadas, pois o armazenamento de cabinas de caminhões, além de representar um alto
Publicado em: 2006
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33. Desenvolvimento da unidade de gerenciamento de uma célula flexível de manufatura integrada a um sistema CAD/CAPP/CAM
The aim of this work is to present a methodology to design and to implement Flexible Manufacturing Cell (FMCs) that should be used to manufacture parts remotely using the World Wide Web resources. This methodology (WebFMC) describes a method to integrate the FMC workstations based on the hierarchical modified control architecture and an architecture to imple
Publicado em: 2006
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34. Simulação do processo de retirada de itens em CDP: um estudo de caso em empresa do ramo automotivo / Simulation of items retrieving process in PDC: a case study in automotive company
This work builds a model, by the discrete event simulation, using the software ARENA 5.0, of a parts distribution centre of an automotive company, to generate information related to employees routing in aisles. There are several variables related to the movement in the retrieving process, such as capacity and velocity of the manual trolley, influence of the
Publicado em: 2005
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35. PLANEJADORES PARA TRANSPORTE EM POLIDUTOS / PIPELINE TRANSPORTATION PLANNERS
Pipelines have an important role in oil and its derivatives transportation, since they are the most effective way to transport high volumes through long distances. The motivation for this work is that a non negligible part of the final price for those products are due to transportation costs. Few authors have addressed this problem, with most of the previous
Publicado em: 2005
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36. Estudo de algoritmos de alocação de rota e comprimento de onda em redes opticas
In this work we studied Routing and Wavelength Assignment (RW A) algorithms on Wavelength Division Multiplexing Optical Networks, using discrete event simulation and analytical modeling. Fixed routing, alternate routing and adaptive routing algorithms were implemented. The effect of the number of wavelengths per optical fiber, number of optical fibers and us
Publicado em: 2003