• Modelos Lomax assimétricos: uma nova abordagem para a classificação de dados binários desbalanceados 

      Reis, Leticia Ferreira Murça (Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Estatística - PPGEs, Câmpus São Carlos, 17/05/2023)
      Imbalanced data refers to a dataset where one class has significantly fewer observations than the other class. This can lead to poor performance of both machine learning algorithms and statistical models, since most of ...
    • Reliability analysis of repairable systems considering unobserved heterogeneity and competing risks 

      Brito, Éder Silva de (Universidade Federal de São Carlos, UFSCar, Programa Interinstitucional de Pós-Graduação em Estatística - PIPGEs, Câmpus São Carlos, 09/10/2023)
      In repairable systems, the failure process defined by the failure intensity function can be impacted by three crucial characteristics: the type of repair performed after the failures occur, the underlying cause of the ...
    • Mapas da transmutação : modelagem, propriedades estruturais, estimação e aplicações 

      Granzotto, Daniele Cristina Tita (Universidade Federal de São Carlos, UFSCar, Programa Interinstitucional de Pós-Graduação em Estatística - PIPGEs, Câmpus São Carlos, 05/12/2016)
      Initially, we use the quadratic transmutation maps to compose a new probability model: the transmuted log-logistic distribution. Transmutation maps are a convenient way of constructing new distributions, in particular ...
    • Bayesian and classical inference for the generalized gamma distribution and related models 

      Ramos, Pedro Luiz (Universidade Federal de São Carlos, UFSCar, Programa Interinstitucional de Pós-Graduação em Estatística - PIPGEs, Câmpus São Carlos, 22/02/2018)
      The generalized gamma (GG) distribution is an important model that has proven to be very flexible in practice for modeling data from several areas. This model has important sub-models, such as the Weibull, gamma, lognormal, ...
    • A new class of discrete models for the analysis of zero-modified count data 

      Silva, Wesley Bertoli da (Universidade Federal de São Carlos, UFSCar, Programa Interinstitucional de Pós-Graduação em Estatística - PIPGEs, Câmpus São Carlos, 03/04/2020)
      In this work, a new class of discrete models for the analysis of zero-modified count data has been introduced. The proposed class is composed of hurdle versions of the Poisson-Lindley, Poisson-Shanker, and Poisson-Sujatha ...
    • Diagnóstico de influência para modelos de regressão linear censurada com misturas de escala assimétrica de distribuições normais 

      Fuentes Guzman, Daniel Camilo (Universidade Federal de São Carlos, UFSCar, Programa Interinstitucional de Pós-Graduação em Estatística - PIPGEs, Câmpus São Carlos, 24/05/2024)
      In this research, we conducted studies on local and global influence diagnostics for \sigla{SSMN-CR}{Censored Linear Regression Models with Skew Scale Mixtures of Normal Distributions}, proposed by \citeonline{guzman2020}. ...