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Series de Fourier aplicadas a problemas de cálculo de variaciones con retardo
Series de Fourier aplicadas a problemas de cálculo de variaciones con retardo
(2012-03-22)
In this article we present an approximation of the minimizing function of the functional J[x]=\int_0^T F(t,X(t),X(t-\tau),\dot{X}(t))dtby approximating X(t) with Cosine Fourier series expansions X_n(t). We give conditions ...
Hércules contra la Hidra y la muerte del Internet
Hércules contra la Hidra y la muerte del Internet
(2011-04-29)
Hercules killed the Hydra of Lerna in a bloody battle—the second of the labor tasks imposed upon him in atonement for his hideous crimes. The Hydra was a horrible, aggressive mythological monster with many heads and poisonous ...
A mixed-effects model for growth curves analysis in a two-way crossed classification layout
(2009-02-20)
We propose a mixed-effects linear model for analyzing growth curves data obtainedusing a two-way classification experiment. The model combines an unconstrainedmeans model and a regression model on the time, in which the ...
Agrupamiento de Filas y Columnas Homogéneas en Modelos de Correspondencia
Agrupamiento de Filas y Columnas Homogéneas en Modelos de Correspondencia
(2011-04-29)
Goodman(1981) proposed homogeneity and structures criterias in Associaton Models which allow to determine if certain rows or columns in a contingency table should be grouped. In later works, he showed the relations between ...
Algoritmos Numéricos para el Problema de Restauración de Imágenes usando el Método de las Proyecciones Alternantes
Algoritmos Numéricos para el Problema de Restauración de Imágenes usando el Método de las Proyecciones Alternantes
(2011-04-29)
The projection algorithms have evolved from the alternating projection method proposed by J. von Neumann in 1933, who treated the problem of finding the projection of a given point in a Hilbert space onto the intersection ...
Invariant Manifolds in Parametric turbulent Models
Invariant Manifolds in Parametric turbulent Models
(2011-04-29)
The article is devoted to examining the so-called local-equilibrium approximations used while modeling turbulent flows. The dynamics of a far plane turbulent wake are investigated as an example. In this article, we analyze ...
Interval Mathematics Applied to Critical Point Transitions
Interval Mathematics Applied to Critical Point Transitions
(2012-03-02)
The determination of critical points of mixtures is important for both practical and theoretical reasons in the modeling of phase behavior, especially at high pressure. The equations that describe the behavior of complex ...
Sobre el problema inverso de difusión
Sobre el problema inverso de difusión
(2009-02-20)
Infiltration is physically described in order to model it as a diffusion stochasticprocess. Theorem M-B 1 is enunciated; whose main objective is the inverse diffusionproblem. The theorem is demonstrated in the specific ...
El problema del conjunto independiente en la selección de horarios de cursos
El problema del conjunto independiente en la selección de horarios de cursos
(2009-02-20)
Registration process at the Universidad Aut´onoma Metropolitana is such thatevery student is free to choose his/her own subjects and schedule. Success of thissystem, based in the percentage of students that obtain a place ...
Term Structure of Interest Rates
Term Structure of Interest Rates
(2012-03-02)
The risk free rate on bonds is a very important quantity that allows calculation of premium values on bonds. This quantity of stochastic nature has been modeled with different degrees of sophistication. This paper reviews ...