Markovian Models
Mostrando 1-12 de 24 artigos, teses e dissertações.
-
1. Termalização e correlações quânticas nos contextos de sistemas quânticos abertos e cadeias de spins
In this thesis, we study the behavior of Quantum Discord in the contexts of open quantum systems and spin chains. Furthermore, we investigate the thermalization process of a spin chain due to interaction with the environment. First, we present a review on the concept of quantum correlation, beginning with the first ideas on non-locality, and leading to the m
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 11/01/2013
-
2. Tópicos em seleção de modelos markovianos / Topics in selection of Markov models
This work related two statistical problems involving the selection of a Markovian model of finite order. Firstly, we propose a procedure to choose a context tree from independent samples, with more than half of them being realizations of the same finite memory Markovian processes with finite alphabet with law P. Our model selection strategy is based on estim
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/12/2011
-
3. A tutorial on hypercube queueing models and some practical applications in Emergency Service Systems
This paper presents some extensions and applications of hypercube queueing models todescribe server-to-customer type Emergency Service Systems. The classical hypercube is a well-known spatially distributed queueing model effective in analyzing these systems, based on Markovian analysis approximations. Experience has shown that each real life Emergency Servic
Pesquisa Operacional. Publicado em: 2011-08
-
4. Superdifusão de caminhadas markovianas e não-markovianas. / Superdifusion of marcovian na non-marcovian walk.
Random walks are tools used in statistical physics to quantitatively describe the evolution of dynamical systems. Such systems are ubiquitous in Nature and each system requires a unique approach. Models of the motion of biological organisms are constructed based on the randomness observed in search strategies. Markovian models attempt to faithfully reproduce
Publicado em: 2010
-
5. Combinação de modelos de campos aleatórios markovianos para classificação contextual de imagens multiespectrais / Combining markov random field models for multispectral image contextual classification
This work presents a novel MAP-MRF approach for multispectral image contextual classification by combining higher-order Markov Random Field models. The statistical modeling follows the Bayesian paradigm, with the definition of a multispectral Gaussian Markov Random Field model for the observations and a Potts MRF model to represent the a priori knowledge. In
Publicado em: 2010
-
6. Expoente de Hurst e diagrama de fase para persistência induzida amnesticamente em processos não-markovianos. / Hurst exponent and the phase diagram for persistence induced amnestic on a non-Markovian
Nowadays there has been a growing interest in anomalous diffusion: the super difusive and sub-difusive processes. The problem about normal diffusion already well established whereas many problems still exist in anomalous diffusion. Several mathematical models and computational techniques have been developed to model such processes. In this work we studied a
Publicado em: 2009
-
7. "Modelos markovianos para canais iônicos em membranas celulares" / Markovian Models in cell membranes
Neste trabalho desenvolvemos e exploramos modelos markovianos aplicados a canais iônicos presentes em membranas celulares
Publicado em: 2006
-
8. Um modelo integrado de inferÃncia Bayesiana e processos Markovianos para anÃlise de sistemas reparÃveis sujeitos a reparo imperfeito via processo de renovaÃÃo generalizado
This dissertation deals with repairable systems submitted to imperfect repair, using a class of stochastic models known as Generalized Renewal Process (GRP), which allows to insert flexibility to approach diverse levels of repair. For such objective, is proposed an non-homogeneous Markovian process model to analyze the dynamic behavior of complex systems, us
Publicado em: 2006
-
9. Aplicações de modelos logisticos regressivos em biologia molecular / Logistic regression models with applications in molecular biology
The advance of gene sequencing has stimulated the development of new statistical techniques to analyze genetic data. In this work the logistic regressive models, introduced by Bonney (1986), are presented first in the context of analysis of familial data and then they are used to analyze codon frequencies in mitochondrial DNA sequences. The assumption of ind
Publicado em: 2006
-
10. Dimensioning of wireless link with voice and data integration / Dimensionamento de enlace sem fio com integração de voz e de dados
The dimensioning of telecommunications network wireless link, with voice and data integration, is presented in this paper. Analysis and synthesis procedures were developed considering Markovian and priority models (with or without preemption). Schemes with or without resources sharing and finite and infinite buffer were considered. The selected models were n
Publicado em: 2005
-
11. AnÃlise da disponibilidade de malhas de completaÃÃo inteligente em poÃos de petrÃleo
This research aims to model and simulate the availability of intelligent completation systems in oil wells. To reach this goal hybrid modeling frameworks comprised of Markovian process and Bayesian inference will be employed. Due to the fact that it is a new technology, still in a development stage, the rates of transitions in Markovian Models of meshes of i
Publicado em: 2004
-
12. Uma metodologia para caracterizaÃÃo de trÃfego de vÃdio baseada nos momentos e primeira e segunda ordem
This thesis presents a new methodology for video traffic characterization. A set of states are defined by a classification algorithm based on the first and second order moments of the codified video sequences. Modulation processes and time series generation that possess statistics associated with the states, defined by the classification algorithm considered
Publicado em: 2004