Teses: Recent submissions

  • CHAGAS, Guilherme Souto; http://lattes.cnpq.br/0586763522925200 (Universidade Federal de ItajubáBrasilIESTI - Instituto de Engenharia de Sistemas e Tecnologia da InformaçãoPrograma de Pós-Graduação: Doutorado - Engenharia ElétricaUNIFEI, 2022-08-24)
    The power flow problem is composed of phasor variables and quantities and thus can be naturally formulated in the complex domain; however, their applications are commonly developed in the real domain. The solution via ...
  • TORRES, Samanta de Oliveira Alves; http://lattes.cnpq.br/9595396625983771 (Universidade Federal de ItajubáBrasilIFQ - Instituto de Física e QuímicaPrograma de Pós-Graduação: Doutorado - Materiais para EngenhariaUNIFEI, 2022-10-07)
    The thermoelectric materials have been very investigated due to its capacity to direct conversion of thermal energy into electrical energy, focusing on the search for materials that have high values of Figure of Merit (ZT), ...
  • SILVA JÚNIOR, João Ider; http://lattes.cnpq.br/4908045776059662 (Universidade Federal de ItajubáBrasilIFQ - Instituto de Física e QuímicaPrograma de Pós-Graduação: Doutorado - Ciência e Engenharia de MateriaisUNIFEI, 2022-07-22)
    This work presents a complete study of thermoelectric materials. It starts with a study of a Solar Concentrator and the development of a Genetic Algorithm and Cross-Entropy for analyzing experimental data. Contains a ...
  • ÂNGULO, Tania Marie Arispe; http://lattes.cnpq.br/5463485164813466 (Universidade Federal de ItajubáBrasilIEM - Instituto de Engenharia MecânicaPrograma de Pós-Graduação: Doutorado - Engenharia MecânicaUNIFEI, 2022-07-28)
    The study and analysis of the sound generated by flows has become increasingly important in several areas of the industry, from household appliances to aeronautical propulsion systems. A particular case is the noise generated ...
  • LOPES, Benedito Isaias de Lima (Universidade Federal de ItajubáBrasilIESTI - Instituto de Engenharia de Sistemas e Tecnologia da InformaçãoPrograma de Pós-Graduação: Doutorado - Engenharia ElétricaUNIFEI, 2004-12-21)
    This thesis discusses the problem of stability in power systems. Some aspects related to power systems dynamics are brie y described, including appendices associated with electric machines theory and numerical methods. The ...
  • TEIXEIRA, Flávio Neves; http://lattes.cnpq.br/3394102440882769 (Universidade Federal de ItajubáBrasilIEM - Instituto de Engenharia MecânicaPrograma de Pós-Graduação: Doutorado - Engenharia MecânicaUNIFEI, 2005-03-18)
    This work presents a characterization of the nitrogen oxides and particulate matter formation and emission, based in the literature, as well in measured date of Brazilian bagasse boilers, and in these cases, it evaluate ...
  • PAIVA, Anderson Paulo de; http://lattes.cnpq.br/4728106898297335 (Universidade Federal de ItajubáBrasilIEM - Instituto de Engenharia MecânicaPrograma de Pós-Graduação: Doutorado - Engenharia MecânicaUNIFEI, 2006-09-29)
    The quality in the manufacturing processes generally depends on the attainment of a great deal of characteristics, which sometimes are correlated. An efficient transformation of these attributes probably can be done through ...
  • GUIMARÃES, João Marcondes Corrêa; http://lattes.cnpq.br/7675045201671861 (Universidade Federal de ItajubáBrasilIESTI - Instituto de Engenharia de Sistemas e Tecnologia da InformaçãoPrograma de Pós-Graduação: Doutorado - Engenharia ElétricaUNIFEI, 2022-07-26)
    Power transformers are directly related to the electrical system reliability and power companies are pressured to improve the quality of service provided. In this scenario, real-time monitoring presents a strategic advantage ...
  • PINHEIRO, Guilherme Gonçalves; Lattes: http://lattes.cnpq.br/6459875405184488 (Universidade Federal de ItajubáBrasilIESTI - Instituto de Engenharia de Sistemas e Tecnologia da InformaçãoPrograma de Pós-Graduação: Doutorado - Engenharia ElétricaUNIFEI, 2022-06-20)
    This study presents an application for a series VSC (Voltage Source Converter) in distribution grids for power flow management. Series devices have been widely studied for FACTS (Flexible AC Transmission Systems), however, ...
  • GABRIEL, Gustavo Teodoro; http://lattes.cnpq.br/2942697416677790 (Universidade Federal de ItajubáBrasilIEPG - Instituto de Engenharia de Produção e GestãoPrograma de Pós-Graduação: Doutorado - Engenharia de ProduçãoUNIFEI, 2022-07-18)
    Computer model validation of Discrete Event Simulation (DES) is essential for project success since this stage guarantees that the simulation model corresponds to the real system. Nevertheless, it is not possible to assure ...
  • FARIA, Gabriel Henrique de; http://lattes.cnpq.br/1224227039239712 (Universidade Federal de ItajubáBrasilIESTI - Instituto de Engenharia de Sistemas e Tecnologia da InformaçãoPrograma de Pós-Graduação: Doutorado - Engenharia ElétricaUNIFEI, 2022-06-29)
    Compact Distribution Network (CDN) provides a great reliability for the medium voltage electric system due to the polyethylene protection present in the cables, avoiding system interruptions caused by non-permanent contact ...
  • CASANÃS, César William Vera; http://lattes.cnpq.br/0968329902273172 (Universidade Federal de ItajubáBrasilIESTI - Instituto de Engenharia de Sistemas e Tecnologia da InformaçãoPrograma de Pós-Graduação: Doutorado - Engenharia ElétricaUNIFEI, 2022-04-14)
    In this work a technique to bias a CMOS current comparator is presented. The current comparator circuit uses the flipped voltage follower (FVF) block as input stage, and a cascode structure is proposed to bias properly ...
  • DINIZ, Camila Aparecida; http://lattes.cnpq.br/0433271127203481 (Universidade Federal de ItajubáBrasilIEM - Instituto de Engenharia MecânicaPrograma de Pós-Graduação: Doutorado - Engenharia MecânicaUNIFEI, 2022-07-22)
    Nowadays, there is no analytical equation able to analyze the issues related to the performance of structures with ply drop-offs. In order to address this issue, a metamodel using Design of Experiments and the SunFlower ...
  • CONCEIÇÃO, José Nilson da; http://lattes.cnpq.br/0432790306636052 (Universidade Federal de ItajubáBrasilIFQ - Instituto de Física e QuímicaPrograma de Pós-Graduação: Doutorado - Materiais para EngenhariaUNIFEI, 2022-08-04)
    Superduplex stainless steels (SDSSs) are austenitic-ferritic corrosion resistant altos (CRA) with pitting equivalent number (PREN) higher than 40. This class of steel combines excellent mechanical properties and corrosion ...
  • FERRAZ, Guilherme Martinez Figueiredo; http://lattes.cnpq.br/9294436011240577 (Universidade Federal de ItajubáBrasilIESTI - Instituto de Engenharia de Sistemas e Tecnologia da InformaçãoPrograma de Pós-Graduação: Doutorado - Engenharia ElétricaUNIFEI, 2022-08-23)
  • PEREIRA, João Luiz Junho; http://lattes.cnpq.br/5864158210538587 (Universidade Federal de ItajubáBrasilIEM - Instituto de Engenharia MecânicaPrograma de Pós-Graduação: Doutorado - Engenharia MecânicaUNIFEI, 2022-08-22)
    This doctoral dissertation presents the most important concepts of multi-objective optimization and a systematic review of the most cited articles in the last years of this subject in mechanical engineering. The State of ...
  • DOVICHI FILHO, Fernando Bruno; http://lattes.cnpq.br/8831577263163592 (Universidade Federal de ItajubáBrasilIEM - Instituto de Engenharia MecânicaPrograma de Pós-Graduação: Doutorado - Engenharia MecânicaUNIFEI, 2022-05-02)
    The present investigation aims to determine the technical and economic potentials of electricity generation from different types of biomasses in the state of Minas Gerais, using different electricity generation ...
  • MOTOKI, Édison Massao; http://lattes.cnpq.br/8287782880373384 (Universidade Federal de ItajubáBrasilIESTI - Instituto de Engenharia de Sistemas e Tecnologia da InformaçãoPrograma de Pós-Graduação: Doutorado - Engenharia ElétricaUNIFEI, 2022-07-25)
    With the advent of electro-electronic technology, the industries have invested in systems and equipment in order to increase productivity and quality of their products. At the same time, researchers indicate that, ...
  • HILÁRIO, Maicon Queiroz; http://lattes.cnpq.br/4871296203849111 (Universidade Federal de ItajubáBrasilIEM - Instituto de Engenharia MecânicaPrograma de Pós-Graduação: Mestrado - Engenharia MecânicaUNIFEI, 2022-04-19)
    In several regions of the world and diferente countries there is a transition of the electricity matrix in progress, driven mainly by environmental issues. However, there are geopolitical aspects involved, suah as the ...
  • FERETTI, Paulo Henrique; http://lattes.cnpq.br/8584355691074841 (Universidade Federal de ItajubáBrasilIESTI - Instituto de Engenharia de Sistemas e Tecnologia da InformaçãoPrograma de Pós-Graduação: Doutorado - Engenharia ElétricaUNIFEI, 2022-06-06)
    This work presents the study and design of a family of non-isolated high step-up dc-dc converters, based on the multi-state switching cell (MSSC) and voltage multiplier cells (VMCs). These converters can be used in ...