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Statistical inference for non-homogeneous Poisson process with competing risks: a repairable systems approach under power-law process
(Universidade Federal de São Carlos, 2019-08-30)
In this thesis, the main objective is to study certain aspects of modeling failure time data of repairable systems under a competing risks framework. We consider two different models and propose more efficient Bayesian ...
Modelo de dispersão Hiper-Poisson para variáveis discretas observáveis e não observáveis
(Universidade Federal de São Carlos, 2019-12-06)
Poisson distribution is widely used to model count data, however it has the disadvantage the
assumption that the data must have equal mean and variance, which is not always true, since
in many situations the phenomenon ...
Modelagem de dados de sistemas reparáveis com fragilidade
(Universidade Federal de São Carlos, 2015-09-15)
The usual models in repairable systems are minimal, perfect and imperfect repair, and, in the literature, the minimum repair model is the most explored. In repairable systems it is common that the same type of components ...
Hedging no modelo com processo de Poisson composto
(Universidade Federal de São Carlos, 2015-12-07)
The investor, that negotiate assets, is subject to economic risks of any negotiation because there is no certainty regarding the appreciation or depreciation of an asset. Here comes the futures market, where contracts can ...
O corte do FBST em modelos de alta dimensionalidade
(Universidade Federal de São Carlos, 2018-12-03)
The problem of controlling the significance level of the FBST (Full Bayesian Significant Test) test
is studied in the context of Bayesian models for density, thus, a Bayesian method is shown that
works with density ...
Frailty model for multiple repairable systems hierarchically represented in serial/parallel structures under assumption of ARAm imperfect repairs
(Universidade Federal de São Carlos, 2021-04-27)
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 ...
Uma construção de cópulas semilineares bivariadas baseada nas famílias AMH, FGM e Plackett
(Universidade Federal de São Carlos, 2021-02-26)
Copulas are cumulative distribution functions defined on the unit square whose margins are uniform. In the context of the present work, we have provided three new families of semilinear copulas based on the copulas AMH, ...
Modelos de regressão misto para resposta limitada usando distribuições do tipo Johson-SB
(Universidade Federal de São Carlos, 2021-03-10)
In this work, new properties, estimation methods, residual analysis and extensions are developed for regression models in the (0,1) interval considering the Johnson-SB type distributions (JSB). The extensions are zero-and-one ...
Avaliação do lasso e métodos alternativos em modelos de regressão logística
(Universidade Federal de São Carlos, 2021-03-11)
Logistic regression has always been an important tool not only in the area of statistics, but also in several other areas such as economic, biological and medical. In many of these areas it is common to encounter problems ...
Contribuições para modelos de diagnóstico cognitivo
(Universidade Federal de São Carlos, 2021-02-23)
Cognitive Diagnostic Models (CDMs) are latent variable models which are useful for identifying the profile of respondents through tests or assessments. They are mainly used in educational assessments, but can also be ...