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Métodos estatísticos aplicados à análise da expressão gênica
(Universidade Federal de São Carlos, 2006-02-23)
The technology of the DNA-Arrays is a tool used to identify and to compare levels of expression of a great number of genes or fragments of genes, in di¤erent conditions.
With this comparison, it is possible to identify ...
Uma abordagem clássica e bayesiana para os modelos de Gompertz e de Richards heteroscedásticos.
(Universidade Federal de São Carlos, 2005-09-16)
This work presents a classical and a Bayesian approaches to two sigmoidal grownth curves, the Gompertz and the Richards models. We consider the homoscedastic assumption and a multiplicative heteroscedastic structure. For ...
Uso do processo gama para dados de sobrevivência.
(Universidade Federal de São Carlos, 2005-01-20)
In this dissertation, we introduce classical and Bayesian approaches to get inferences
on the parameters of interest, considering exponential and Weibull distributions for the
lifetimes. For a Bayesian analysis, we assume ...
Análise de referência Bayesiana para o modelo Weibull na aplicação de riscos competitivos
(Universidade Federal de São Carlos, 2009-01-30)
There are situations where various risk factors of failure are present, in the same time, in the life of system. For this reason we say that these factors are competing to cause the system failure. However, only one of ...
Modelos de regressão logística clássica, Bayesiana e redes neurais para Credit Scoring
(Universidade Federal de São Carlos, 2008-02-15)
Important advances have been achieved in the granting of credit, however, the problem of identifying good customers for the granting of credit does not provide a definitive solution. Several techniques were presented and ...
Análise de dados longitudinais para variáveis binárias
(Universidade Federal de São Carlos, 2009-03-05)
The objective of this work is to present techniques of regression analysis for longitudinal data when the response variable is binary. Initially, there is a review of generalized linear models, marginal models, transition ...
Modelos de sobrevivência de longa-duração : uma abordagem unificada
(Universidade Federal de São Carlos, 2008-06-13)
In survival analysis some studies show a meaningful cure rate after treatment followup, so considering standard survival models can not be appropriate. In this work is extended the long-term survival model proposed by Chen, ...
Presença de dados missing em modelos de regressão logística
(Universidade Federal de São Carlos, 2008-09-05)
In this work we present a detailed study of the logistic regression model with missing data in the independent variables. Several techniques are considered such as Complete Case, Mean Imputation and Corrected Complete Case. ...
Modelagem de partição bayesiana para dados de sobrevivência de longa duração
(Universidade Federal de São Carlos, 2009-11-27)
In this work we present a bayesian approach for the survival model with cure rate in the presence of covariates. In this perspective, the modelling is a direct extension of the long-term model of (Chen et al., 1999). This ...
Uma abordagem bayesiana para análise de fraude de subscrição em telecomunicações
(Universidade Federal de São Carlos, 2006-06-09)