Documentação de convênios
URI permanente desta comunidadehttps://rigalileo.itegam.org.br/handle/123456789/173
Trabalhos ténico-científico oriundos de convênios com universidades para oferta de turmas de mestrado e doutorados no Estado do Amazonas
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Resultados da Pesquisa
Item Sistema de Extração de Conhecimentos de Redes Neurais(INSTITUTO DE TECNOLOGIA, 2015) AZEVEDO, Manoel S. Santos; NEVES, Cleonor C. das; CASTRO, Adriana Rosa G; LEITE, Jandecy Cabral.; Prof. Dr. Carlos Tavares da Costa JúniorThis paper proposes a system for extracting knowledge from neural networks aided by fuzzy logic, emphasizing the generation of a rule bank representing process behavior. The system enables the construction of models for control or information retrieval, particularly in cases where traditional modeling is unfeasible. The approach employs neuro-fuzzy networks to extract knowledge distributed across network connections.Item ESTUDOS DE PROCESSOS DE EXTRAÇÃO E CARACTERIZAÇÃO DE FIBRAS DO FRUTO DO AÇAÍ (Euterpe oleracea MART.) DA AMAZÔNIA PARA PRODUÇÃO DE ECOPAINEL DE PARTÍCULAS DE MÉDIA DENSIDADE(Universidade Federal do Pará, 2013) MESQUITA, Antonio de Lima; FARIA, Lênio José Guerreiro deThe fibrous tissue of the açaí fruit (Euterpe oleracea Mart.) is discarded in large quantities in the Metropolitan Region of Belém (PA), Brazil, after juice production. This agro-industrial residue is rarely utilized sustainably. This thesis aimed to study extraction and treatment processes of açaí fruit fibers through biological maceration, both spontaneous and induced, and chemical mercerization with NaOH, with and without autoclave, for the development of new alternative composite materials for the civil construction industry. Anatomical, chemical, physical, and mechanical characterizations of the fibers were performed, followed by the fabrication of homogeneous particle ecopanels bonded with castor oil-based bicomponent polyurethane resin. The physical-mechanical and microstructural characterization of the ecopanels demonstrated significant improvements in treated fiber properties, such as tensile strength, water absorption, and thickness swelling, evidencing the potential use of the residue as raw material for the production of sustainable ecopanels with possible applications in the construction and furniture industries.Item OTIMIZAÇÃO MULTIOBJETIVO DA COMPENSAÇÃO DE POTÊNCIA REATIVA EM REDES DE DISTRIBUIÇÃO CONSIDERANDO RESTRIÇÕES DE DISTORÇÃO HARMÔNICA(Universidade Federal do Pará, 2014) AZEVEDO, Manoel Socorro Santos; BEZERRA, Ubiratan HolandaThe correct location of capacitor banks in electric power distribution networks aims to compensate for excess reactive power flow through transmission lines, reducing operational costs by decreasing energy losses and increasing active power transmission capacity while ensuring appropriate voltage and power factor levels. The proliferation of nonlinear loads has introduced new challenges due to the harmful effects of harmonics on power quality. This thesis develops a computational tool using computational intelligence techniques with genetic algorithms (GA) for multiobjective optimization of reactive power compensation in electric distribution networks, capable of optimally locating and sizing compensation units while achieving economic benefits and complying with Brazilian power quality standards. The approach considers the use of capacitor banks and harmonic filters and applies the NSGA-II algorithm to determine Pareto-optimal solutions. The methodology enables the determination of reactive power compensation considering harmonic presence while maintaining compliance with normative limits on harmonic distortion.Item PROJETO MULTICRITÉRIO DE FILTROS HARMÔNICOS PASSIVOS PARA INSTALAÇÕES INDUSTRIAIS UTILIZANDO TÉCNICAS DE INTELIGÊNCIA COMPUTACIONAL(Universidade Federal do Pará, 2013) LEITE, Jandecy Cabral; TOSTES, Maria Emília de LimaDue to the industrial growth in Northern Brazil, especially at the Manaus Industrial Pole (PIM), mathematical tools are needed to assist experts in selecting and sizing harmonic filters that neutralize the harmful effects of harmonics generated by nonlinear loads and ensure compliance with power quality standards. Additionally, passive harmonic filters (PHF) can act as reactive power compensators, achieving significant energy billing savings. This thesis develops a mathematical method and a computational tool for selecting the configuration and design parameters of PHFs in industrial systems, formulating the problem as a multi-objective optimization that considers both harmonic distortion reduction and the project's economic effectiveness, complying with Brazilian and international standards. The computational solution is based on the NSGA-II genetic algorithm, generating a Pareto front of optimal solutions that allow designers to select the most suitable option. The tool includes innovative features, such as automatic selection of filter configuration and number of branches, and considers various operational scenarios. Validation was performed through practical examples that demonstrated the advantages of the proposed method.Item ANÁLISE EXPERIMENTAL DO PROCESSO DE EXTRAÇÃO DO ÓLEO ESSENCIAL DE PUXURI [Licaria puchury-major (Mart.) Kosterm., Lauraceae] POR ARRASTE COM VAPOR(Universidade Federal do Pará, 2014) MAFRA, Eduardo de Souza; FARIA, Lênio José Guerreiro deThis work experimentally analyzes the extraction process of essential oil from seeds and aerial parts of puxuri by steam distillation. Puxuri [Licaria puchury-major (Mart.) Kosterm., Lauraceae] is an Amazonian forest species with great potential for the bioproducts industry (pharmaceuticals, cosmetics, food, and natural pesticides) due to the presence of safrole in its essential oil. An anatomical and physicochemical characterization study was carried out on plant parts used for oil extraction. The drying kinetics of seeds, thin branches, and leaves were studied, and the influence of convective drying on safrole content and final moisture was quantified. Statistically designed experiments identified the optimal levels of process variables to maximize both essential oil yield and safrole content within the adopted experimental domain and 90% confidence. The essential oil was chemically analyzed by GC-MS to identify its major components. Desorption isotherms were obtained for powdered puxuri seeds, well-fitted by the GAB model, with estimated sorption heats and equilibrium moisture contents. The essential oil showed low toxicity, and the solid residue from the extraction process can be used as raw material for the production of cold-process transparent soaps.Item METODOLOGIA DE PLANEJAMENTO PARA INSERÇÃO DE GERADORES FOTOVOLTAICOS EM REDES ELÉTRICAS ISOLADAS E SUPRIDAS POR GERADORES A DIESEL(Universidade Federal do Pará, 2013) GONÇALVES, Cláudio; VIEIRA, João Paulo AbreuRenewable energy sources based on photovoltaic generation (PVG) are promising energy alternatives to complement conventional, centralized power generation, as the diesel thermal plants supplying power to isolated grids in cities and remote locations in the Amazon Region. The allocation and sizing of generators for distributed generation application (DG) is a challenging problem, with technical and economic implications related to the planning, design and operation of these systems. Particularly, the PVG presents added difficulty as it is a function of environmental conditions, mainly temperature and solar radiation. This thesis presents an analytical methodology to allocate and size active power photovoltaic generation units with embedded DC/AC inverter (PVGI) to be integrated as concentrated or dispersed generation in isolated medium voltage electrical grids. The proposed methodology considers multiple objectives to be reached namely: improving the electrical grid voltage profile; reducing active power losses; and reducing the diesel generation participation, providing, this way, a reduction in diesel oil consumption and in the environmental pollution. The global obtained solution of the proposed method is a weighted commitment to these goals, presenting different weights according to priorities established in the electrical system under planning. To validate the proposed methodology, the IEEE 33 and 69 buses networks and an isolated real electrical system were modeled and simulated. The real electrical system is located in Aveiro City, in the Amazon region, Brazil. The simulation results obtained demonstrated that the proposed methodology is effective in providing a solution with significant improvement in voltage profile, active power losses reduction, and diesel generation participation reduction, according to viable technical and economic indicators to the PVGI integration in the isolated electrical grid.Item Industrial Multivariate Explorer: A solution with Matlab for time series mining(INSTITUTO DE TECNOLOGIA, 2015) SEISDEDOS, Luis Vázquez; CASTILLO, Alvaro Aguilera; MARTINEZ, David Diaz; ROSALES, Rolando Ramis; PEREZ, Jose Manuel Rodriguez; Jandecy Cabral LeiteThe study introduces the development of a Matlab application named Industrial Multivariate Explorer (IME), designed to explore and extract information from time series data in chemical and thermo-energy processes. The tool allows visualization of up to eight normalized signals, selection of specific time windows with cursors, and calculation of descriptive statistics for static modeling. Results can be saved in Excel files, facilitating the analysis of quasi-stationary states in industrial processes. The application was tested with real data from a 250 MW thermal power plant and simulated data, demonstrating its utility for process monitoring and diagnostics.Item Isothermic Gasification Octave(INSTITUTO DE TECNOLOGIA, 2015) MATIAUDA, Mario; DE LEÓN BENÍTEZ, Juan B.; ARTEAGA, Luis Ernesto; FREAZA, Nora; RIVERO, Marta; YACHECEN, Carlos; Eduardo de Magalhães BragaGasification is a process of thermal conversion where solid biomass (sawdust pellets) is transformed into gas by partial oxidation at high temperatures. The model is based on the two-phase theory (bubble - emulsion), suitable for predicting experimental results in reactions occurring in fluidized beds. The model simulation includes mass and energy balances and hydrodynamic studies, with assumptions such as isothermal process behavior.Item Limestone Calcination Optimization of Vertical Container Oven(INSTITUTO DE TECNOLOGIA, 2015) SAGASTUME GUTIÉRREZ, Alexis; Manoel Henrique Reis NascimentoProducing lime demands high energy consumption and leads to significant CO₂ emissions. This study aims to establish a methodology to optimize limestone calcination in standard vertical kilns in Cuba, considering lime quality’s impact on the economic contribution margin. Tools such as exergy analysis and genetic algorithms were used. Major inefficiencies identified include combustion irreversibilities, heat transfer losses, and exergy loss through exhaust gases. Applying the methodology reduced energy consumption by 4.6% and improved lime quality by 5.3%.Item Loss of product (cryogenic liquid) for filling of cars - tanks: production of liquid(INSTITUTO DE TECNOLOGIA, 2015) TORRINHA, Andrea da Silva; OLIVEIRA, Maria Socorro Frutuoso de; GUEDES, Megue Pinheiro; LEITE, Jandecy Cabral; José Antônio da Silva SouzaThe paper analyzes the loss of cryogenic liquids (oxygen and nitrogen) during the filling of tank cars, a critical stage in the transportation of these gases. Losses occur due to heat exchanges causing vaporization, internal pressure increase in tanks, and inadequate pump handling. Using field questionnaires, operational data, and literature review, the study suggests improvements such as better thermal insulation and operator training, emphasizing the economic and environmental impacts of such waste.