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Distribuição normal assimétrica para dados de expressão gênica
(Universidade Federal de São Carlos, 2009-04-17)
Microarrays technologies are used to measure the expression levels of a large amount of genes or fragments of genes simultaneously in diferent situations. This technology is useful to determine genes that are responsible ...
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, ...
Modelos estatísticos para LGD : uma visão clássica e bayesiana
(Universidade Federal de São Carlos, 2011-03-28)
Every day in financial institution is common to nd customers who are unable to honor their commitments. When this occurs we say that the individual is in default. In a possible economic downturn the portfolio could su_er ...
Regiões de incerteza para a curva ROC em testes diagnósticos
(Universidade Federal de São Carlos, 2009-03-03)
Diagnostic tests are methods capable of indicating the presence or absence of a disease, with a probability of error. The performance of a diagnostic test can be verified by some indicator, as: the specificity, the sensitivity ...
Introdução ao controle estatístico de processo on-line
(Universidade Federal de São Carlos, 2011-04-07)
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. ...
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 ...
Aspectos práticos da estimação do modelo de mistura via processo de Dirichlet
(Universidade Federal de São Carlos, 2013-04-03)
We review the Dirichlet process mixture model and investigate its performance as a classification method. The first aspect considered is its sensibility to the choice of location parameter of the base distribution. The ...
Regressão de dados binários : distribuição Weibull
(Universidade Federal de São Carlos, 2010-03-12)
In this work a new class of models for binary data based on Weibull distribution is introduced. A review is made of the most known linkage functions. This class of models has as special case the complementary log-log model ...