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Inferência em modelos de mistura via algoritmo EM estocástico modificado
(Universidade Federal de São Carlos, 2017-06-02)
We present the topics and theory of Mixture Models in a context of maximum likelihood and Bayesian inferece. We approach clustering methods in both contexts, with emphasis on the stochastic EM algorithm and the Dirichlet ...
A abordagem de martingais para o estudo de ocorrência de palavras em ensaios independentes
(Universidade Federal de São Carlos, 2017-04-07)
Let {Xn} be a sequence of i.i.d. random variables taking values in an enumerable alphabet. Given a finite collection of words, we observe this sequence till the moment T at which one of these words appears as a run. In ...
Modelagens estatística para dados de sobrevivência bivariados : uma abordagem bayesiana
(Universidade Federal de São Carlos, 2017-03-31)
The frailty models are used to model the possible associations between survival times. Another alternative developed for modeling the dependence between multivariate data is the use of models based on copulas functions.
In ...
Controle de sistemas não-Markovianos.
(Universidade Federal de São Carlos, 2017-09-13)
In this thesis, we present a concrete methodology to calculate the epsilon-optimal controls for non-Markovian stochastic systems. A pathwise analysis and the use of the discretization structure proposed by Leão and Ohash ...
Distribuições preditiva e implícita para ativos financeiros
(Universidade Federal de São Carlos, 2017-06-01)
We present two different approaches to obtain a probability density function for the
stock?s future price: a predictive distribution, based on a Bayesian time series model, and
the implied distribution, based on Black & ...
Alternative regression models to beta distribution under bayesian approach
(Universidade Federal de São Carlos, 2017-08-25)
The Beta distribution is a bounded domain distribution which has dominated the modeling the
distribution of random variable that assume value between 0 and 1. Bounded domain distributions
arising in various situations ...
Regressão binária usando ligações potência e reversa de potência
(Universidade Federal de São Carlos, 2017-04-07)
The aim of this dissertation is to study a family of asymmetric link functions for binary regression models under Bayesian approach. Specifically, we present the estimation of parameters of power and reversal power binary ...
Programação linear aplicada a estatística
(Universidade Federal de São Carlos, 2017-11-27)
Determine probabilities for events where we have few information or intervals for probabilities is not so simple. For this we will develop concepts of linear programming, which allows us to solve, in a certain way, the ...
Modeling based on a reparameterized Birnbaum-Saunders distribution for analysis of survival data
(Universidade Federal de São Carlos, 2017-01-09)
In this thesis we propose models based on a reparameterized Birnbaum-Saunder (BS) distribution
introduced by Santos-Neto et al. (2012) and Santos-Neto et al. (2014), to analyze survival data.
Initially we introduce the ...
Comparing two populations using Bayesian Fourier series density estimation
(Universidade Federal de São Carlos, 2017-04-12)
Given two samples from two populations, one could ask how similar the populations are, that is,
how close their probability distributions are. For absolutely continuous distributions, one way
to measure the proximity of ...