Teses: Recent submissions

  • SANTOS, Eudes Müller D’Oliveira; http://lattes.cnpq.br/1404004205953061 (Universidade Federal de ItajubáBrasilIEM - Instituto de Engenharia MecânicaPrograma de Pós-Graduação: Doutorado - Engenharia MecânicaUNIFEI, 2021-12-10)
    There is a constant search for greater availability of energy resources since energy is a vital item for the development of a country. Projections for electricity demand until 2030 point to an increase, in which 20% ...
  • SILVA, Rodrigo Gustavo Dourado da; http://lattes.cnpq.br/5439264603872225 (Universidade Federal de ItajubáBrasilIEM - Instituto de Engenharia MecânicaPrograma de Pós-Graduação: Doutorado - Engenharia MecânicaUNIFEI, 2022-03-15)
    The determination of the imposed heat rate in welding processes has always been an obstacle to the modeling of this problem. Thus, the use of inverse problem techniques is an alternative to estimate the unknown heat rate. ...
  • URIBE, Juan Oswaldo Montoya; http://lattes.cnpq.br/0527140627655800 (Universidade Federal de ItajubáBrasilIFQ - Instituto de Física e QuímicaPrograma de Pós-Graduação: Doutorado - Materiais para EngenhariaUNIFEI, 2022-03-09)
    CaCu3Ti4O12 (CCTO) ceramics have attracted increasing interest because of their extraordinary dielectric constant values (κ > 104 at 1 kHz). The structural, microstructural and dielectric characteristics of the CCTO ...
  • NASCIMENTO, Bruno de Nadai; http://lattes.cnpq.br/0236505514444560 (Universidade Federal de ItajubáBrasilIESTI - Instituto de Engenharia de Sistemas e Tecnologia da InformaçãoPrograma de Pós-Graduação: Doutorado - Engenharia ElétricaUNIFEI, 2019-10-11)
    The evolution of current electrical systems is notorious when compared in the last years. This evolution is mainly due to the emergence of the smart-grids concept, giving increased access to the penetration of distributed ...
  • VILELA, Flávio Fraga; http://lattes.cnpq.br/8745354624285353 (Universidade Federal de ItajubáBrasilIEPG - Instituto de Engenharia de Produção e GestãoPrograma de Pós-Graduação: Doutorado - Engenharia de ProduçãoUNIFEI, 2022-04-20)
    In discrete event simulation (DES) projects, generally, some computational validation criteria are not defined assertively and human factors are not integrated and considered in the input data modeling phase. An erroneous ...
  • OLIVEIRA, Mayara Lima Peres de; http://lattes.cnpq.br/9751340389663749 (Universidade Federal de ItajubáBrasilIFQ - Instituto de Física e QuímicaPrograma de Pós-Graduação: Doutorado - Materiais para EngenhariaUNIFEI, 2022-02-21)
    Power transformers (TP) connect the entire electrical energy network, which goes from the generation and production of energy to the final consumer. Therefore, it is necessary to monitor their operating conditions. The ...
  • MEDEIROS, Giúlia Oliveira Santos; http://lattes.cnpq.br/4742381779252997 (Universidade Federal de ItajubáBrasilIESTI - Instituto de Engenharia de Sistemas e Tecnologia da InformaçãoPrograma de Pós-Graduação: Doutorado - Engenharia ElétricaUNIFEI, 2022-03-25)
    The electricity distribution sector in Brazil has the characteristic of a natural monopoly and needs economic regulation. The mechanism adopted for tariff regulation is the Periodic Tariff Review (RTP), carried out by ...
  • BORTOLUZZI, Daniel Brighenti; http://lattes.cnpq.br/1785298761573425 (Universidade Federal de ItajubáBrasilIFQ - Instituto de Física e QuímicaPrograma de Pós-Graduação: Doutorado - Materiais para EngenhariaUNIFEI, 2022-02-24)
    This study is focused on the assessment of the interlaminar fracture toughness in mode II and vibration mechanical properties of composites reinforced through the thickness with rectangular z-pinned manufactured by ...
  • ALVAREZ, Gustavo Perez; http://lattes.cnpq.br/4676782213314154 (Universidade Federal de ItajubáBrasilIESTI - Instituto de Engenharia de Sistemas e Tecnologia da InformaçãoPrograma de Pós-Graduação: Doutorado - Engenharia ElétricaUNIFEI, 2003-11-10)
    This thesis presents a new probabilistic technique to evaluate the operating reserve needs of power systems in a competitive environment. The main objectives are: the capacity assessment for different reserve markets ...
  • SILVA FILHO, Milton Nunes da; http://lattes.cnpq.br/4341259979650705 (Universidade Federal de ItajubáBrasilIESTI - Instituto de Engenharia de Sistemas e Tecnologia da InformaçãoPrograma de Pós-Graduação: Doutorado - Engenharia ElétricaUNIFEI, 2006-12-03)
    This thesis presents a methodology, based on techniques of artificial intelligence, especially of specialist and united systems approximate, to aid in the process of electric outlet of decision. The central idea was ...
  • RESENDE, Leonidas Chaves de; http://lattes.cnpq.br/7342383170952914 (Universidade Federal de ItajubáBrasilIESTI - Instituto de Engenharia de Sistemas e Tecnologia da InformaçãoPrograma de Pós-Graduação: Doutorado - Engenharia ElétricaUNIFEI, 2006-10-16)
    The well-being analysis was recently proposed as a new framework to measure the degree of adequacy of power systems, which has as the main objective the incorporation of deterministic criteria into the reliability ...
  • SIQUEIRA, Marcelo Luís; http://lattes.cnpq.br/8622484781616780 (Universidade Federal de ItajubáBrasilIEM - Instituto de Engenharia MecânicaPrograma de Pós-Graduação: Doutorado - Engenharia MecânicaUNIFEI, 2022-02-23)
    Nodular cast iron is one of the most used ferrous materials by engineering currently, whether as components for the automotive industry, for the basic sanitation industry or for the component industries in general. One ...
  • AMORIM, Leandro Framil; http://lattes.cnpq.br/5465683588887997 (Universidade Federal de ItajubáBrasilIEPG - Instituto de Engenharia de Produção e GestãoPrograma de Pós-Graduação: Doutorado - Engenharia de ProduçãoUNIFEI, 2022-03-21)
    This study presents a non-linear bi-objective optimization method for correlated responses of Robust parameter design optimization (RPD) using Normal Boundary Intersection (NBI) method. Even in capable region for multiple ...
  • VICENTE, José Manuel Esteves; http://lattes.cnpq.br/1750213515020226 (Universidade Federal de ItajubáBrasilIESTI - Instituto de Engenharia de Sistemas e Tecnologia da InformaçãoPrograma de Pós-Graduação: Doutorado - Engenharia ElétricaUNIFEI, 2006-10-06)
    With the increasing expansion of the distribution transformers market in the last years in Brazil and considering the implementation necessity of ISO 9001 (International Organization for Standardization), by the majority ...
  • COBAS, Vladimir Rafael Melian; http://lattes.cnpq.br/3077963106849610 (Universidade Federal de ItajubáBrasilIEM - Instituto de Engenharia MecânicaPrograma de Pós-Graduação: Doutorado - Engenharia MecânicaUNIFEI, 2006-09-05)
    The following work presents a study of the simulation of high Fuel Cells temperature, SOFC, and the operation integrated with gas microturbines into combined cycle. The principal aim is to reach high fuel utilization ...
  • MORAES, Carlos Henrique Valério de; http://lattes.cnpq.br/3460761031788198 (Universidade Federal de ItajubáBrasilIESTI - Instituto de Engenharia de Sistemas e Tecnologia da InformaçãoPrograma de Pós-Graduação: Doutorado - Engenharia ElétricaUNIFEI, 2006-05-12)
    Power system operation is made from a control center. Through a complex telemetry system, that supplies the dispatcher the current values measured into the electric system, he/she should make the decisions of how to ...
  • MARTINS, Helga Gonzaga; http://lattes.cnpq.br/0259888450882117 (Universidade Federal de ItajubáBrasilIESTI - Instituto de Engenharia de Sistemas e Tecnologia da InformaçãoPrograma de Pós-Graduação: Doutorado - Engenharia ElétricaUNIFEI, 2003-11-26)
    In the control systems, the working theoretical basis have been the classic logic, because of the binary structure of these systems (true or false), in such a way that the reasoning is made with simplifications like ...
  • MENEZES, Hélio Burle de; http://lattes.cnpq.br/2872938957595283 (Universidade Federal de ItajubáBrasilIESTI - Instituto de Engenharia de Sistemas e Tecnologia da InformaçãoPrograma de Pós-Graduação: Mestrado - Engenharia ElétricaUNIFEI, 2006-03-24)
    The increasing complexity of interconnected electric systems operation demands real time on-line monitoring which is accomplished by control centers. It is indispensable to have validation procedures for measures, detecting ...
  • CARVALHO, Emerson Assis de; http://lattes.cnpq.br/2565976082903026 (Universidade Federal de ItajubáBrasilIESTI - Instituto de Engenharia de Sistemas e Tecnologia da InformaçãoPrograma de Pós-Graduação: Doutorado - Engenharia ElétricaUNIFEI, 2022-02-21)
    Autism is an age- and sex-related lifelong neurodevelopmental condition characterized pri marily by persistent deficits in core domains such as social communication. It is estimated that ≈ 2% of children have some ASD ...
  • TAETS, Leandro Alexandre Ribeiro; http://lattes.cnpq.br/6191996167807510 (Universidade Federal de ItajubáBrasilIEM - Instituto de Engenharia MecânicaPrograma de Pós-Graduação: Doutorado - Engenharia MecânicaUNIFEI, 2021-12-16)
    The use of renewables in electricity generation, especially wind and solar, has grown worldwide, taking advantage of reductions in equipment costs and policies to encourage substitution of fossil fuels. However, one ...