Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 55 for “"Engenharia elétrica"”.
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Estratégias de operações em empresas prestadoras de serviços de engenharia elétrica na região metropolitana de Curitiba
… de obras de rede de distribuição de energia elétrica. Inicialmente foram identificados os graus de importância para o cliente, com relação a determinados critérios competitivos. Logo após, foram identificados o desempenho das empresas para os mesmos critérios. Finalmente, por meio da Matriz …
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Aplicação do BIM no projeto e estimativa de custo de um eletrocentro
… de curso apresenta um estudo aplicado à área de engenharia elétrica, com o objetivo de demonstrar a aplicação da metodologia BIM (Building Information Modeling) no desenvolvimento de projetos industriais, com ênfase sobre um projeto de um eletrocentro. A finalidade é mostrar como o uso do BIM …
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Underwater simulation and mapping using imaging sonar through ray theory and Hilbert maps
Mapping, sometimes as part of a SLAM system, is an active topic of research and has remarkable solutions using laser scanners, but most of the underwater mapping is focused on 2D maps, treating the environment as a floor plant, or on 2.5D maps of the seafloor. The reason for the problematic of …
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Bayes meets Bach: applications of Bayesian statistics to audio restoration
Memoryless nonlinear distortion can be present in audio signals, from recording to reproduction: bad quality or amateurishly operated equipments, physically degraded media and low quality reproducing devices are some examples where nonlinearities can naturally appear. Another quite common defect in …
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Correlação de alarmes e diagnóstico no gerenciamento de sistemas supervisionados por computador
Este trabalho investiga a aplicação de métodos e técnicas de correlação de alarmes na detecção e diagnóstico de falhas em sistemas supervisionados por computador. Atualmente, alguns centros de supervisão ainda não se utilizam destas técnicas para o tratamento das informações recebidas de suas redes …
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Análise de comportamento do usuário em redes sociais veiculares
Participation in social networks can provide a significant amount of data about users and their surroundings. When properly processed, such data can be used as an important source of information on human behavior if it provides reliable and quality information. In this work, we use a vehicular …
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Aplicação de sincrofasores na proteção de redes de distribuição com geração distribuída
The penetration of Distributed Generation (DG) is a reality in distribution networks, adding capacity to attend to the growing demand. However, this DG penetration can not be done in an uncontrolled way. It requires a comprehensive analysis to adapt the present systems to this new scenario. In the …
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Codiagnosticabilidade de sistemas a eventos discretos com observação dinâmica
In this work, a new algorithm for verifying the codiagnosticability of a language in discrete event systems (DES) with dynamic observation is proposed. Codiagnosticability in DESs with dynamic observation has been addressed by other studies in the literature. Each of the methods currently available …
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Perfilagem do problema de resolução da equação da onda por diferenças finitas em coprocessador Xeon Phi
Software Optimization is a promising technique to scientific computing applications, which can have calculations that may require several hours or even days. The idea of this work is to validate, using performance metrics, the optimization of a finite differences code that solve the wave equation …
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Passivity-Based adaptive bilateral teleoperation control for uncertain manipulators without jerk measurements
In this work, we consider the bilateral teleoperation problem of cooperative robotic systems in a Single-Master Multi-Slave (SM/MS) configuration, which is able to perform load transportation tasks in the presence of parametric uncertainty in the robot kinematic and dynamic models. The …
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Multiscale simulation of frequency dependent line models and network equivalents
The evaluation of power systems encompasses phenomenon of distinct timeframes and so leads to the adoption of different simulation tools. For instance, fast transients related to switching maneuvers require time-steps of microseconds while slow transients, related to energy exchange between …
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Fibra de crital fotônico: fundamentação e aplicações
The main purpose of this dissertation, consists of the study and analysis of the PBG (Photonic Band Gap )..tecnology incorporated in optical fiber structures. So, we'l1 present a complete PBG structure theory, and folowing this, we'l1 present also a chapter for convencional optical fiber, due to …
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Desenvolvimento de um joelho eletrônico para utilização em próteses transfemorais
O joelho é uma das articulações do corpo humano mais importante para a realização da movimentação no espaço, permitindo que os seres humanos se locomovam em pequenas distâncias. Pessoas que apresentam amputações acima do joelho possuem dificuldades em se adaptarem a sociedade, pois não conseguem …
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The power of quasi-shortest paths and the impact of node mobility on dynamic networks
The objective of this thesis is to investigate three important aspects of dynamic networks: the impact of node mobility on multihop data transmission, the effect of the use of longer paths on the relative importance of nodes and the performance of the network in the presence of failure on central …
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Avaliação da capacidade máxima de hospedagem de minigeração e microgeração distribuída em alimentadores de média tensão
Distributed Generation has caused important changes in its operating paradigm in the Electrical System and the development of tools that help from the concessionaire to the autoproducer in the control of flows and service to the system is extremely important. At present, defining the best …
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Deep CNN and MLP-based vision systems for algae detection in automatic inspection of underwater pipelines
Artificial neural networks, such as the multilayer perceptron (MLP), have been increasingly employed in various applications. Recently, deep neural networks, specially convolutional neural networks (CNN), have received considerable attention due to their ability to extract and represent high-level …
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Estudo de sensor de campo magnético baseado em fibra óptica com rede de Bragg e Filme Fino de Terfenol-D
Magnetic field measurement has many application from military area, as detection of airplanes, ships and tanks, to electrical generator and transmission system as electric current sensing. Sensors based on optical fiber with thin film technology become great options to this application, once they …
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Análise do impacto da geração eólica na regulação de frequência de sistemas de energia elétrica
The growing concern about the environment and sustainable energy production is characterized by the increasing penetration of wind power plants in the energy portfolio of many countries. This work presents aspects related to the participation of wind power plants in the frequency regulation of …
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Otimização dos parâmetros de um sensor de correntes parasitas para detecção de defeitos através de simulação eletromagnética
Bi-metalic steels, such as clad steels, have been extensively used in various industries due to its unique mechanical and corrosion behavior. However, these alloys show particular characteristics which lead to the need for specific inspection techniques in order to ensure the structural integrity …
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Imunossensor optoeletrônico para detecção de contaminação de escherichia coli na água
This work proposes the study and development of plastic optical fiber (POF) immunosensors for contaminated water identification in less than an hour. Based on the immune response, the POF is functionalized with an antibody to capture bacteria and identify Escherichia coli concentrations in water. …
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