Browsing Engenharia Elétrica - EE by Issue Date
Now showing items 41-60 of 64
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Novas arquiteturas fotônicas para redução da dependência do fator de qualidade e fator de extinção à erros de nanofabricação em cavidades ópticas
(Universidade Federal de São Carlos, UFSCar, , Câmpus São Carlos, 04/04/2023)In this work, experimental data from a device fabricated in a Foundry was used to demonstrate a reduction in the dependence of the quality factor and the minimum power transmitted to nanofabrication errors. To prove this, ... -
Aplicação de redes neurais para previsão de demanda de energia elétrica
(Universidade Federal de São Carlos, UFSCar, , Câmpus São Carlos, 05/04/2023)In the early 2000s, the Brazilian electrical system was less developed than it is today and depended much more on hydroelectric generation, as 80% came from it. A study conducted by the Ministry of Mines and Energy revealed ... -
Classificação de imagens de satélite com redes neurais convolucionais
(Universidade Federal de São Carlos, UFSCar, , Câmpus São Carlos, 06/04/2023)Satellite images are used in several areas, such as agribusiness, urban planning, environmental monitoring, among others. These images have a large and complex amount of data and the application of Machine Learning techniques ... -
Desenvolvimento de um sistema para economia de combustível com rede neural artificial
(Universidade Federal de São Carlos, UFSCar, , Câmpus São Carlos, 06/04/2023)This article aims to develop a data acquisition board to identify the uphill and downhill stretches of a vehicle through an LSTM (Long Short Term Memory) artificial neural network, and to estimate the reduction in fuel ... -
Algoritimo de detecção de retinopatia diabética baseado em aprendizado de máquina
(Universidade Federal de São Carlos, UFSCar, , Câmpus São Carlos, 06/04/2023)In this study, the application of neural network and machine learning techniques was explored in order to identify the presence of lesions related to diabetic retinopathy (DR) in fundus images. DR is a frequent complication ... -
Projeto, montagem e teste de um subwoofer ativo
(Universidade Federal de São Carlos, UFSCar, , Câmpus São Carlos, 14/04/2023)The present work describes in detail the development and construction of an active bass reproduction system "subwoofer". For this, it uses a TPA3255 integrated circuit. This class D amplifier has two outputs that are applied ... -
Desenvolvimento de um amplificador de áudio de alto desempenho utilizando realimentação negativa global
(Universidade Federal de São Carlos, UFSCar, , Câmpus São Carlos, 14/04/2023)This paper proposes the development of a high-performance audio amplifier with global feedback. The proposed topology is based on "A design methodology for audio amplifiers with no global negative feedback: proposal and ... -
Análise de um amplificador de áudio padrão
(Universidade Federal de São Carlos, UFSCar, , Câmpus São Carlos, 14/04/2023)This work analyzes and assembles the 50W "Blameless" audio amplifier designed by Douglas Self in his book. The three stages of the amplifier, the feedback loop, and the mechanisms used to minimize distortion were studied. ... -
O uso de algoritmos de classificação para determinar estoques de segurança
(Universidade Federal de São Carlos, UFSCar, , Câmpus São Carlos, 13/07/2023)This work analyzes the application of different Artificial Neural Network algorithms with the objective of classifying candidate products for safety stock parameterization based on the purchase history of these products. ... -
Aplicação web back-end de um fantasy game
(Universidade Federal de São Carlos, UFSCar, , Câmpus São Carlos, 21/07/2023)In Brazil, the most popular sport is football and, therefore, it is recognized in scenarios that go beyond the lawns, such as the Fantasy Games. Users of this game style create and manage their own teams online, using real ... -
Desenvolvimento de um videocurso sobre o software de simulação LTspice
(Universidade Federal de São Carlos, UFSCar, , Câmpus São Carlos, 28/08/2023)This article describes the creation of an introductory video course on the LTspice circuit simulation software, with a focus on meeting the learning needs of students and electronics enthusiasts. The course comprises eleven ... -
Geração de chave na camada física para sistemas FDD baseado em aprendizagem profunda
(Universidade Federal de São Carlos, UFSCar, , Câmpus São Carlos, 28/08/2023)The advancement of telecommunications and the transition to the next generation of networks (6G) opens new challenges and opportunities. Security at the physical layer (PLS, Physical Layer Security) is crucial to ensure ... -
Comparação de métodos clássicos e avançados de previsão aplicados ao consumo de energia elétrica
(Universidade Federal de São Carlos, UFSCar, , Câmpus São Carlos, 30/08/2023)A garantia de um abastecimento de energia eficiente depende de uma previsão de demanda adequada, permitindo uma gestão eficiente dos recursos e otimização de processos, manutenções e investimentos. Este estudo avalia o ... -
Melhoria do simulador do sistema turbogerador
(Universidade Federal de São Carlos, UFSCar, , Câmpus São Carlos, 01/09/2023)The turbogenerator system, comprising a crucial turbine and generator component in power generation systems, along with an initial boiler, has seen advancements in technology over the years, leading to new possibilities ... -
Projeto, implementação e testes de um amplificador de áudio de alta fidelidade para fones de ouvido
(Universidade Federal de São Carlos, UFSCar, , Câmpus São Carlos, 01/09/2023)In this monograph, a high fidelity audio amplifier with tone control for headphones was developed. Circuits are built on printed circuit boards using discrete components. Topologies were initially determined to be simulated ... -
Projeto e avaliação de desempenho de um amplificador de áudio sem realimentação negativa global utilizando transistores bipolares de junção
(Universidade Federal de São Carlos, UFSCar, , Câmpus São Carlos, 01/09/2023)This work proposes the development of an audio amplifier without global feedback using bipolar transistors of junction. It will be used as the basis of the article “A design methodology for audio amplifiers without global ... -
Desenvolvimento de transistores de efeito de campo a partir de monocamada de WS2 sobre hBN em substrato de óxido de silício
(Universidade Federal de São Carlos, UFSCar, , Câmpus São Carlos, 01/09/2023)The discovery of graphene triggered a significant increase in research related to two-dimensional materials. Among them, transition metal dichalcogenides, 2D materials referring to groups 4-7 of the periodic table with ... -
Detecção e identificação de doenças em folhas utilizando redes neurais
(Universidade Federal de São Carlos, UFSCar, , Câmpus São Carlos, 06/09/2023)In this study, an approach using neural networks for the detection and classification of diseases in soybean leaves based on images was explored. The main objective of the research was to develop a model capable of ... -
Revisão bibliográfica: erros causados por raios cósmicos em dispositivos eletrônicos
(Universidade Federal de São Carlos, UFSCar, , Câmpus São Carlos, 27/10/2023)Cosmic rays, coming from outer space, can penetrate eletronic devices in order to change several characteristics such as functioning, performance and useful life. These particles are composed of an atomic nuclei, made up ... -
Análise técnico-econômica de projetos de sistemas de geração fotovoltaica residenciais
(Universidade Federal de São Carlos, UFSCar, , Câmpus São Carlos, 06/02/2024)Observing the increasing energy demand and the significant rise in electricity tariffs for consumers, especially residential consumers, in recent years, it becomes viable to find means to reduce the exposure of these ...