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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

Otimização da expansão de um sistema energetico usando grafos generalizados : estudo de caso da Bolivia

Valenzuela Turdera, Eduardo Mirko 21 June 1993 (has links)
Orientador: Paulo de Barros Correia / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica / Made available in DSpace on 2018-07-18T13:12:48Z (GMT). No. of bitstreams: 1 ValenzuelaTurdera_EduardoMirko_M.pdf: 2718302 bytes, checksum: 5ae1d11b1e5e3300905fc72bd192fb85 (MD5) Previous issue date: 1993 / Resumo: Não informado / Abstract: This work studies the long term expansion system. The system has two suplier networks: the and the natural gas network. The coordinated expansion has been possible because both networks are coupled through the natural gas thermal plants. The simple-cycle and combined-cicle plants are included in the evaluation scenery from 2010 year, besides the hydroelectric projects. The expansion must to meet the local demands of electricity and natural gas and the commitment of natural gas exportation. The Bolivian Energy System is represented as an optimal expansion model when the objective function is to minimize the operation and investment costs of the projects. The generalized network algorithm an especialization of linear programming, is use as a tool for the solution of the energy model. The branch-and-bound technique helps to find the best alternatives for the expansion. The use of natural gas for output electricity in the next twenty years, in this expansion plan, cost and the dispossibility of big reserves, if it of Bolivian Energy electrical network will trend to rise because its low is considered the local consume / Mestrado / Mestre em Planejamento de Sistemas Energéticos
12

Uma ferramenta para auxilio visual ao teste e depuração de programas

Vilela, Plinio Roberto Souza 25 March 1994 (has links)
Orientadores : Mario Jino, Jose Carlos Maldonado / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica / Made available in DSpace on 2018-07-18T23:49:44Z (GMT). No. of bitstreams: 1 Vilela_PlinioRobertoSouza_M.pdf: 5744979 bytes, checksum: f8dcf850429c1e7981c14dc8a7803c38 (MD5) Previous issue date: 1994 / Resumo: Os principais aspectos da especificaçãoda ViewGraph, uma ferramenta cujo propósito é auxiliar a atividade de teste e depuração de programas, através da visualização de informações de teste fomecidas pela POKE-TOOL [CHA91], são apresentados. Os principais pontos relacionados do Teste Estrutural Baseado em Análise de Fluxo de Dados suportado pela POKE-TOOL, são também apresentados. Os principais algoritmos utilizados na ferramenta ViewGraph são aqueles que tratam da geração da disposição gráfica dos grafos de programa; sua descrição é mostrada em detalhes nessa dissertação. Uma avaliação empírica dos algoritmos foi realizada e os resultados são apresentados. As características bem como os principais problemas encontrados na implementação de um subconjunto da especificação da ViewGraph são também discutidos / Abstract: The specification and main features are presented of ViewGraph, a tool designed to aid in testing and debugging tasks by providing the visualization of test information produced by POKE-TOOL [CHA91]. The main points on Structural Testing based on Data Flow Analysis, supported by POKE-TOOL,are also presented. The most important algorithms in ViewGraph are the ones which deal with the visualization of program graphs; their detailed description is shown. An empirical evaluation of the algorithms was conducted and the results are presented. The characteristics as well as the major problems of the implementation of a subset of the specification of ViewGraph are aiso discussed.I / Mestrado / Mestre em Engenharia Elétrica
13

Estudo de comunidades de dípteros necrófagos sob o formalismo de grafos e árvores de decisão /

Souza, Caroline Rodrigues de. January 2016 (has links)
Título original da capa: Estudo de comunidades de dípteros necrófagos sob o formalismo de biclusters e árvores de decisão / Orientador: Claudio José Von Zuben / Banca: Patricia Jacqueline Thyssen / Banca: Edilberto Giannotti / Banca: Maria José de Oliveira Campos / Banca: Wesley Augusto Conde Godoy / Resumo: The pattern recognition in ecological communities is one of the most antique and persistent challenges of ecological science. In this sense, through mathematical modelling from graphs, using biclusters and decision trees, the objective of the present work was to find patterns in the occurrence of necrophagous dipterans collected in three different areas (rural, urban and forest) and with three different baits (sardines, liver and beef) in the city of Rio Claro-SP. Algorithms (InClose and RInClose-biclusters, C 4.5-decision trees) were used to obtain the results. Through the analysis of biclusters, it can be highlighted those that related Atherigona orientalis (Schiner) and Musca domestica Linnaeus in all environments, less forest area, probably due to the fact of being species known for their preference for areas inhabited by humans. On the other hand, even being species possessing high dependence by antropobiocenose, other biclusters indicated an association between Lucilia eximia (Wiedemann) and Chrysomya megacephala (Fabricius) occurring with greater frequency in the forest, attracted by the bait of meat or liver, both known for their importance in the attractiveness of calliphorid fly. This may be explained due to the population growth occurred around the forest, giving the characteristics of place inhabited by man. With regard to decision trees, were obtained in total 19 decision trees (8 to the family Sarcophagidae, 4 for Muscidade and 7 to Calliphoridae) and from them... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: The pattern recognition in ecological communities is one of the most antique and persistent challenges of ecological science. In this sense, through mathematical modelling from graphs, using biclusters and decision trees, the objective of the present work was to find patterns in the occurrence of necrophagous dipterans collected in three different areas (rural, urban and forest) and with three different baits (sardines, liver and beef) in the city of Rio Claro-SP. Algorithms (InClose and RInClose-biclusters, C 4.5-decision trees) were used to obtain the results. Through the analysis of biclusters, it can be highlighted those that related Atherigona orientalis (Schiner) and Musca domestica Linnaeus in all environments, less forest area, probably due to the fact of being species known for their preference for areas inhabited by humans. On the other hand, even being species possessing high dependence by antropobiocenose, other biclusters indicated an association between Lucilia eximia (Wiedemann) and Chrysomya megacephala (Fabricius) occurring with greater frequency in the forest, attracted by the bait of meat or liver, both known for their importance in the attractiveness of calliphorid fly. This may be explained due to the population growth occurred around the forest, giving the characteristics of place inhabited by man. With regard to decision trees, were obtained in total 19 decision trees (8 to the family Sarcophagidae, 4 for Muscidade and 7 to Calliphoridae) and from them various patterns can be detected such as: A. orientalis, Synthesiomyia nudiseta (Wulp, 1883) and M. domestica being present together if the season is Spring, the bait is sardines and the location is urban. Oxysarcodexia thornax (Walker) was the only specie in which to achieve the condition of presence, it is necessary to walk only one node ... (Complete abstract electronic access below) / Doutor
14

Sistema inteligente para aplicações de soluções ao bombeamento mecanico de petroleo

Correa, Jose Franscisco dos Santos 11 December 1995 (has links)
Orientador: Armando Freitas da Rocha / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica / Made available in DSpace on 2018-07-21T02:56:55Z (GMT). No. of bitstreams: 1 Correa_JoseFransciscodosSantos_M.pdf: 41587022 bytes, checksum: c47a8413c82326cd5f7ca0d6e891453e (MD5) Previous issue date: 1995 / Resumo: o presente trabalho apresenta proposta de um sistema inteligente para a análise e apresentação de soluções a serem aplicadas em poços equipados com bombeamento mecânico. Este sistema engloba o tratamento de dados contidos em base de dados, a identificação de sintomas através de agentes especializados, a análise do conjunto de sintomas e a proposta de ações no sentido de corrigir problemas e otimizar o sistema bombeamento mecânico. Conceitos de engenharia de petróleo como dimensionamento e verificação do sistema de bombeamento mecânico, análise Nodal , cálculo da carta dinamométrica de fundo, fluxo multifásico, propriedades dos fluidos, "Inflow Performance Relationship", Interferência de Gás, dentre outros, foram incorporados ao sistema e integrados por agentes inteligentes desenvolvidos a partir de conceitos de Inteligência Artificial, tais como, sistemas distribuidos, redes neurais simbólicas e lógica nebulosa. o "Sistema Inteligente para Análise de Cartas Dinamométricas", atualmente em desenvolvimento através de convênio entre a PETROBRÁS e UNICAMP, tem seu campo de atuação ampliado pelo presente trabalho, através da incorporação dos conceitos citados / Abstract: This work presents a proposal for a Sucker Rod Pumping Analysis Expert System, with the main characteristic of presentating diagnostics and solutions to sucker rod pumping problems. The system includes database treatment, syntoms identification, diagnosis and solutions proposals, performed by a group of agents specialized in sucker rod pumping problems solution and otimization. Artificial Inteligence concepts such as distribuited systems, neural nets and fuzzy logic, as long as Petroleum Engineering concepts such as design and verification of sucker rod pumping, nodal analysis, and pump dynagraph are used by the inteligent agents to broadly analyse the sucker rod pumping system. The use of the above concepts in this work, enlarges the PETROBRÁS UNICAMP project "Sistema Inteligente para análise de Cartas Dinamométricas" scope in the treatment of sucker rod pumping problems / Mestrado / Mestre em Engenharia de Petróleo
15

Linked biology = from phenotypes towards phylogenetic trees / Conectando dados biológicos : dos fenótipos às árvores filogenéticas

Miranda, Eduardo de Paula, 1984- 24 August 2018 (has links)
Orientador: André Santanchè / Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Computação / Made available in DSpace on 2018-08-24T12:38:30Z (GMT). No. of bitstreams: 1 Miranda_EduardodePaula_M.pdf: 3021722 bytes, checksum: 93a67943f673753c003a021060a55b6c (MD5) Previous issue date: 2013 / Resumo: Um grande número de estudos em biologia, incluindo os que envolvem a reconstrução de árvores filogenéticas, resultam na produção de uma enorme quantidade de dados -- por exemplo, descrições fenotípicas , matrizes de dados morfológicos , árvores filogenéticas, etc. Biólogos enfrentam cada vez mais o desafio e a oportunidade de efetivamente descobrir conhecimento a partir do cruzamento e comparação de vários conjuntos de dados, nem sempre conectados e integrados. Neste trabalho, estamos interessados em um contexto específico da biologia em que biólogos aplicam ferramentas computacionais para construir e compartilhar descrições digitais dos seres vivos. Nós propomos um processo que parte de fontes de dados fragmentadas, que nós mapeamos para grafos, em direção a uma plena integração das descrições através de ontologias. Os bancos de dados de grafos intermediam o processo de evolução. Eles são menos dependentes de esquema e, uma vez que ontologias também são grafos, o processo de mapeamento do grafo inicial para uma ontologia torna-se uma sequência de transformações no grafo. Nossa motivação parte da ideia de que a conversão de descrições fenotípicas em uma rede de relações e a busca de conexões entre elementos relacionados irá aumentar a capacidade de resolver problemas mais complexos suportados por computadores. Este trabalho detalha os princípios de concepção por trás do nosso processo e duas implementações práticas como prova de conceito / Abstract: A large number of studies in biology, including those involving phylogenetic trees reconstruction, result in the production of a huge amount of data -- e.g., phenotype descriptions, morphological data matrices, phylogenetic trees, etc. Biologists increasingly face a challenge and opportunity of effectively discovering useful knowledge crossing and comparing several pieces of information, not always linked and integrated. In this work, we are interested in a specific biology context, in which biologists apply computational tools to build and share digital descriptions of living beings. We propose a process that departs from fragmentary data sources, which we map to graphs, towards a full integration of descriptions through ontologies. Graph databases mediate this evolvement process. They are less schema dependent and, since an ontology is also a graph, the mapping process from the initial graph towards an ontology becomes a sequence of graph transformations. Our motivation stems from the idea that transforming phenotypical descriptions in a network of relationships and looking for links among related elements will enhance the ability of solving more complex problems supported by machines. This work details the design principles behind our process and two practical implementations as proof of concept / Mestrado / Ciência da Computação / Mestre em Ciência da Computação
16

O problema da coloração total em classes de grafos / The total colouring problem in classes of graphs

Campos, Christiane Neme, 1972- 04 May 2006 (has links)
Orientador: Celia Picinin de Mello / Tese (doutorado) - Universidade Estadual de Campinas , Instituto de Computação / Made available in DSpace on 2018-08-06T12:11:33Z (GMT). No. of bitstreams: 1 Campos_ChristianeNeme_D.pdf: 1048367 bytes, checksum: e8270db6704873ddaf2043927ca93e99 (MD5) Previous issue date: 2006 / Doutorado / Teoria dos Grafos / Doutor em Ciência da Computação

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