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Mostrando ítems 1-15 de 15

    • Time series forecasting : advances on Theta method 

      Fiorucci, José Augusto (Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Estatística - PPGEs, Câmpus São Carlos, 13/05/2016)
      Accurate and robust forecasting methods for univariate time series are critical as the historical data can be used in the strategic planning of such future operations as buying and selling to ensure product inventory and ...

    • Models for inflated data applied to credit risk analysis 

      Oliveira Júnior, Mauro Ribeiro de (Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Estatística - PPGEs, Câmpus São Carlos, 27/09/2016)
      In this thesis, we introduce a methodology based on zero-inflated survival data for the purposes of dealing with propensity to default (credit risk) in bank loan portfolios. Our approach enables us to accommodate three ...

    • Novas distribuições em análise de sobrevivência envolvendo composição e correlação dentre as causas competitivas 

      Marchi, Vitor Alex Alves de (Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Estatística - PPGEs, Câmpus São Carlos, 14/08/2015)
      In this thesis, we construct distribution functions for analysis of lifetimes with the focus in scenes of latent risks inspired in models of the carcinogenesis process. Some properties of these distribution functions are ...

    • Multivariate Copula-based SUR Tobit Models : a modified inference function for margins and interval estimation 

      Silva, Paulo Henrique Ferreira da (Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Estatística - PPGEs, Câmpus São Carlos, 30/09/2015)
      In this thesis, we extend the analysis of multivariate Seemingly Unrelated Regression (SUR) Tobit models by modeling their nonlinear dependence structures through copulas. The capability in coupling together the diferent ...

    • Bayesian spatial process models for activation patterns in transcranial magnetic stimulation mapping 

      Egbon, Osafu Augustine (Universidade Federal de São Carlos, UFSCar, Programa Interinstitucional de Pós-Graduação em Estatística - PIPGEs, Câmpus São Carlos, 07/07/2023)
      In recent years, Spatial statistical models have been gaining rapid attention for solving problems in biological systems due to the improvement in spatial data collection. It has proven extremely important in unveiling ...

    • Avaliação esportiva utilizando técnicas multivariadas: construção de indicadores e sistemas online 

      Maiorano, Alexandre Cristovão (Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Estatística - PPGEs, Câmpus São Carlos, 10/10/2014)
      The main objective of this research is to provide statistical tools that allow the comparison of individuals in a speci ed sports category. Particularly, the present study is focused on the performance evaluation in ...

    • Modelos de sobrevivência para estimação do período de latência do câncer 

      Bettim, Bárbara Beltrame (Universidade Federal de São Carlos, UFSCar, Programa Interinstitucional de Pós-Graduação em Estatística - PIPGEs, Câmpus São Carlos, 29/06/2017)
      Cancer is responsible for about 13% of all deaths in the world occuring mainly in people who are late diagnosed and in advanced stages. Due to its devastating characteristics and the growing prevalence of the disease, ...

    • Modelo Weibull modificado de longa duração 

      Oliveira, Cleyton Zanardo de (Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Estatística - PPGEs, Câmpus São Carlos, 07/12/2011)
      When a group of patients is monitored until a pre-established date for observation of the recurrence time of an event, it is possible that, at the end of the monitoring period, a parcel of such group has not yet suffered ...

    • Modelo alfa normal assimétrico multivariado para redes de classificação 

      Souza, Anderson Luiz Ara (Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Estatística - PPGEs, Câmpus São Carlos, 16/03/2016)
      In this Thesis we expose the proposition of a new class of probability distributions, the so called alpha skew normal multivariate, an extension of the univariate Normal Alpha distribution, introduced by Elal-Olivero (2010). ...

    • Modelagem conjunta de dados longitudinais e de sobrevivência para avaliação de desfechos clínicos do parto 

      Maiorano, Alexandre Cristovão (Universidade Federal de São Carlos, UFSCar, Programa Interinstitucional de Pós-Graduação em Estatística - PIPGEs, Câmpus São Carlos, 06/12/2018)
      As most pregnancy-related deaths and morbidities are clustered around the time of child birth, the quality of care during this period is crucial for mothers and their babies. To monitor the women at this stage, the partograph ...

    • Penalized regression methods for compositional data 

      Shimizu, Taciana Kisaki Oliveira (Universidade Federal de São Carlos, UFSCar, Programa Interinstitucional de Pós-Graduação em Estatística - PIPGEs, Câmpus São Carlos, 10/12/2018)
      Compositional data consist of known vectors such as compositions whose components are positive and defined in the interval (0,1) representing proportions or fractions of a "whole", where the sum of these components must ...

    • Modelos alternativos em filas M/G/1 

      Prado, Silvia Maria (Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Estatística - PPGEs, Câmpus São Carlos, 26/11/2015)
      The main aim of this work is to develop alternative queuing models to M/ G/l, in which arrivals follow a Poisson process, the total number of customers on the system and the total number of service channels are unknown. ...

    • Técnicas de classificação aplicadas a credit scoring: revisão sistemática e comparação 

      Frazzato Viana, Renato (Universidade Federal de São Carlos, UFSCar, Programa Interinstitucional de Pós-Graduação em Estatística - PIPGEs, Câmpus São Carlos, 18/12/2015)
      Nowadays the increasing amount of bank transactions and the increasing of data storage created a demand for risk evaluation associated with personal loans. It is very important for a company has a very good tools in credit ...

    • Modelagem de dados de sobrevivência com eventos recorrentes via fragilidade discreta 

      Macera, Márcia Aparecida Centanin (Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Estatística - PPGEs, Câmpus São Carlos, 02/09/2015)
      In this thesis it is proposed alternative methodologies and extensions on models for recurrent event data. Speci cally, we propose a model in which the distribution of the gap time is easily derived from the marginal ...

    • Frailty model for multiple repairable systems hierarchically represented in serial/parallel structures under assumption of ARAm imperfect repairs 

      Gonzatto Junior, Oilson Alberto (Universidade Federal de São Carlos, UFSCar, Programa Interinstitucional de Pós-Graduação em Estatística - PIPGEs, Câmpus São Carlos, 27/04/2021)
      The main objective of this thesis is to extend the methodology used to treat failure time data. In particular, we wish to propose an appropriate modeling to a context of hierarchically represented repairable systems, subject ...