Asymptotic Methods
Mostrando 13-24 de 43 artigos, teses e dissertações.
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13. Further statistical methods in regression models of the exponential family / Aperfeiçoamento de métodos estatísticos em modelos de regressão da família exponencial
In this work, we develop three topics related to the exponential family nonlinear regression. First, we obtain the asymptotic covariance matrix of order $n^$, where $n$ is the sample size, for the maximum likelihood estimators corrected by the bias of order $n^$ in generalized linear models, considering the precision parameter known. Second, we calculate an
Publicado em: 2009
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14. Modelos lineares generalizados simÃtricos heterocedÃsticos
The heteroscedastic symmetrical generalized linear models class is describe for a response that belongs to a symmetrical class of distributions, a linear predictor relate to a location parameter and a linear predictor associate to a dispersion parameter, both link functions. These models are natural extensions of symmetrical generalized linear models propose
Publicado em: 2009
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15. A straightforward multiallelic significance test for the Hardy-Weinberg equilibrium law
Much forensic inference based upon DNA evidence is made assuming Hardy-Weinberg Equilibrium (HWE) for the genetic loci being used. Several statistical tests to detect and measure deviation from HWE have been devised, and their limitations become more obvious when testing for deviation within multiallelic DNA loci. The most popular methods-Chi-square and Like
Genetics and Molecular Biology. Publicado em: 2009
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16. Bayesian methods in meta-analysis: specication of prior distributions for the between-studies variability / Métodos bayesianos em metanálise: especificação da distribuição a priori para a variabilidade entre os estudos
MAZIN, S. C. Bayesian methods in meta-analysis: specication of prior distributions for the between-studies variability. 2009. 175s. Dissertation (master degree) - Faculty of Medicine of Ribeir~ao Preto, University of S~ao Paulo, Ribeir~ao Preto, 2009. Health professionals, researchers and others responsible for health policy are often overwhelmed by amounts
Publicado em: 2009
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17. Regime não-linear de trens de ondas modulados na direção transversal em um escoamento de Poiseuille plano / The nonlinear regime of spanwise modulated wavetrains in a plane Poiseuille flow
The current thesis had three objectives. The first objective was to develop a code of direct numerical simulation (DNS) to simulation of waves of instability in a plane Poiseuille flow. The other main objective was to analyze it through the method of manufactured solutions (MMS). Finally, a third objective was to study the nonlinear regime of spanwise modula
Publicado em: 2008
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18. On the divergence of line search methods
We discuss the convergence of line search methods for minimization. We explain how Newton's method and the BFGS method can fail even if the restrictions of the objective function to the search lines are strictly convex functions, the level sets of the objective functions are compact, the line searches are exact and the Wolfe conditions are satisfied. This ex
Computational & Applied Mathematics. Publicado em: 2007
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19. Calculating the dimension of a Euclidian Quantum Gravity model / Cálculo da dimensão em um modelo de gravitação quântica euclidiana
This work had the intention of calculating the dimension of a Euclidian Quantum Gravity model which in based on the formalism of non commutative geometry. This work is a continuation of the article [4]. From [4] we know that using a commutative spectral triple allows us to generalize and treat ordinary geometry in a purely algebraic manner. From Non commutat
Publicado em: 2007
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20. MICROHYDRODYNAMICS AND RHEOLOGY OF EMULSIONS / MICROHIDRODINÂMICA E REOLOGIA DE EMULSÕES
Este trabalho trata do escoamento na escala das gotas e da Reologia de emulsões diluídas. Técnicas analíticas e numéricas são empregadas na solução do problema. Nas vizinhan»cas das gotas o escoamento pode ser considerado livre de efeitos de inércia e conseqüentemente as equações governantes são as equações de Stokes. Esse limite é conhecido
Publicado em: 2007
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21. Transition models for binary data / Modelos de transição para dados binários
Binary or dichotomous data are quite common in many fields of Sciences in which there is an interest in registering the occurrence of a particular event. On the other hand, when each sampled unit is evaluated in more than one occasion, we have longitudinal data or repeated measures over time. It is also common, in longitudinal studies, to have explanatory va
Publicado em: 2007
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22. Dissipação, termalização e descoerencia via acoplamento caotico / Dissipation, thermalization and decoherence through chaotic coupling
We study here how and under which conditions a chaotic system with only two degrees of freedom can produce irreversible phenomena such as dissipation, thermalization and, from the quantum point of view, decoherence in a simple system coupled to it. In the classical formulation of the problem, we describe analytically the behavior of the energy ux in Linear R
Publicado em: 2006
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23. Asymptotic seismic modeling using finite-differences / Modelamento sismico assintotico utilizando diferenças finitas
Não informado.
Publicado em: 2005
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24. Modelling Complex Longitudinal Survey Data
Modelling methods for longitudinal complex survey data are investigated in this thesis. An empirical investigation using longitudinal survey data is conducted. Variance effects of clustering are identified and results indicate that clustering impacts may be stronger for longitudinal studies than for cross-sectional studies. Earlier empirical evidence that th
Publicado em: 2005