Centro de Ciências Exatas e de Tecnologia - CCET: Recent submissions
Itens para a visualização no momento 1761-1780 of 7409
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Inferência para modelos de fração de cura zeros inflacionados aplicados a dados de risco de crédito
(Universidade Federal de São Carlos, UFSCar, , Câmpus São Carlos, 28/10/2021)Given the great demand for granting credit and service goods, there is a need to be able to control the risk involved in the process. This measure aims to manage possible unwanted events, for example, default, in order to ... -
Detecção automática de postagens possivelmente depressivas em redes sociais
(Universidade Federal de São Carlos, UFSCar, , Câmpus São Carlos, 22/11/2021)Currently, depression is one of the most worrisome mental health issues. In Brazil, in 2019, 10.2% of the adult population reported having been diagnosed with depression according to data from the National Health Survey. ... -
Análise comparativa entre algoritmos de agrupamento e de detecção de comunidades em redes
(Universidade Federal de São Carlos, UFSCar, , Câmpus São Carlos, 22/11/2021)Clustering is one of the most notorious Machine Learning techniques and has an infinite number of practical applications in different areas of knowledge. Understanding the types of approaches and their characteristics is ... -
Avaliação de métodos de construção de redes na classificação semi-supervisionada de textos
(Universidade Federal de São Carlos, UFSCar, , Câmpus São Carlos, 23/11/2021)Due to the shear amount of data produced daily in text format, being it publicly on social media or privately inside enterprises, there is a growing need to analyze and extract information from them. The objective is to ... -
Transformações geométricas: fazendo arte na aula de matemática
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Ensino de Ciências Exatas - PPGECE, Câmpus São Carlos, 10/11/2021)The present work aims to analyze the study of symmetry in Elementary School, through classes given online, aiming at the active participation of the student in the teaching and learning process of Mathematics, using ... -
Proposta de remodelação e revitalização do sistema viário do condomínio Damha Golf em São Carlos-SP
(Universidade Federal de São Carlos, UFSCar, , Câmpus São Carlos, 12/11/2021)This work presents a proposal for the remodeling and revitalization of the Damha Golf condominium road system, located in the city of São Carlos, São Paulo. This proposal presents an analysis with a theoretical basis, where ... -
O desenvolvimento territorial urbano e sua transformação geoespacial entre os anos de 2000 e 2020 no município de Campinas - SP
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Engenharia Urbana - PPGEU, Câmpus São Carlos, 03/09/2021)The growth history of the city of Campinas contains many of the elements of the colonial city, an important center of sugar and later coffee production in the interior of São Paulo. However, it is from the process of ... -
Cellulose nanomaterials isolated via enzymatic and mechanical routes for application in hydrogels
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Engenharia Química - PPGEQ, Câmpus São Carlos, 10/11/2021)The integrated production of different bioproducts has been considered essential to make biorefineries economically viable. Among the bioproducts, cellulose nanomaterials (CNs) have attracted significant attention due to ... -
Análise da influência da nanosílica na resistência à compressão de concretos: uma revisão
(Universidade Federal de São Carlos, UFSCar, , Câmpus São Carlos, 09/11/2021)Currently, concrete is the most used material in civil construction for the most diverse types of constructions. Due to its importance for the area, more researches study about the physical and mechanical properties of the ... -
Utilização de agrupamento como método de pré-processamento em problemas de regressão linear
(Universidade Federal de São Carlos, UFSCar, , Câmpus São Carlos, 19/11/2021)For real-world data to be explored, pre-processing is needed in order to ease machine learning applications. Nowadays, various pre-processing techniques are available, and this paper aims to show the impacts of using ... -
Armazenagem de hidrogênio em cavacos de magnésio produzidos por meio de usinagem criogênica
(Universidade Federal de São Carlos, UFSCar, , Câmpus São Carlos, 21/06/2021)Hydrogen is a clean and low cost fuel, and its storage on solid state shows out to be a possibility for large scale application. Magnesium is considered a good material for hydrogen storage due to some interesting features ... -
Transiente hidráulico em adutoras: estudo de um sistema adutor em operação em Porto Ferreira-SP
(Universidade Federal de São Carlos, UFSCar, , Câmpus São Carlos, 18/11/2021)The hydraulic transient is a phenomenon that occurs when a sudden change in the behavior of a certain fluid is imposed, either by changes in route (a valve closing, for example) or changes in physical parameters such as ... -
Identidades polinomiais para a álgebra de Jordan das matrizes triangulares superiores 2x2
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Matemática - PPGM, Câmpus São Carlos, 28/10/2021)Let K be a field (finite or infinite) of char(K) ≠ 2, and let UTn = UTn(K) be the n x n upper triangular matrix algebra over K. If · is the usual product on UTn, then with the new product a ○ b = (1/2)(a·b + b·a), UTn ... -
Mapeamento isométrico de atributos baseado em geometria diferencial para aprendizado de métricas não supervisionado
(Universidade Federal de São Carlos, UFSCar, , Câmpus São Carlos, 16/11/2021)The act of representing a dataset in a way that’s more compact and significant is denominated dimensionality reduction. The capacity of building adaptive distance functions to each dataset before classification is known ... -
Análise de polaridade e de tópicos em tweets no domínio da política no Brasil
(Universidade Federal de São Carlos, UFSCar, , Câmpus São Carlos, 14/10/2021)The political scenario in Brazil is one of the busiest and most controversial in the last decade. With the advent of social networks, a new communication channel between voters and politicians was created, with users having ... -
Aprendizado não supervisionado de métricas via redução de dimensionalidade para reconhecimento de dígitos numéricos
(Universidade Federal de São Carlos, UFSCar, , Câmpus São Carlos, 16/11/2021)Character recognition is a task that has occurred since the last century and is still a problem to be solved nowadays. One of the challenges is that the characters to be classified are images, therefore, they have many ... -
Métodos de agrupamento longitudinal: uma aplicação em dados de ondas ultrassônicas
(Universidade Federal de São Carlos, UFSCar, , Câmpus São Carlos, 12/11/2021)The preservation of buildings faces several challenges, such as the wear caused by weather, atmospheric conditions, soil settlement or even lack of proper maintenance. In some cases, such as historical heritage, it is not ... -
Multivariate conditional density estimation with copulas
(Universidade Federal de São Carlos, UFSCar, Programa Interinstitucional de Pós-Graduação em Estatística - PIPGEs, Câmpus São Carlos, 29/09/2021)Most machine learning regression models only yield single point estimations for the label of a new observation. However, when dealing with multi-modal or asymmetric distributions, a single point estimate is not enough to ... -
Aço inoxidável duplex de baixa liga, S32101: uma visão tecnológica sobre resistência mecânica, impacto, corrosão localizada e microestrutura
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Engenharia Mecânica - PPGEMec, Câmpus São Carlos, 08/09/2021)The applications of duplex stainless steels are growing steadily in fields such as the paper, foodstuff, chemical and petrochemical industries. However, one drawback is cost, mainly due to the presence of Ni and Mo. Recently, ... -
Síntese da SBA-15 funcionalizada com aminossilanos e sua aplicação na condensação aldólica entre o furfural e a acetona
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Química - PPGQ, Câmpus São Carlos, 14/10/2021)The petroleum is used to manufacture plastics, solvents and, mainly, to produce fuels. However, some factors such as fluctuation in the price of the barrel, its non-renewable origin and the release of greenhouse gases make ...