Non Markovian
Mostrando 1-12 de 28 artigos, teses e dissertações.
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1. QoS management in smart grids: a Markovian approach
In Smart Grids, a variety of new applications are available to users of the electrical system (from consumers to the electric system operators and market operators). Some applications such as the SCADA systems, which control generators or substations, have consequences, for example, with a communication delay. The result of a failure to deliver a control mes
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2014-12
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2. 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
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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
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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
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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
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6. Green function for a non-Markovian Fokker-Planck equation: comb-model and anomalous diffusion
We investigate solutions, by using the Green function approach, for a system governed by a non-Markovian Fokker-Planck equation and subjected to a Comb structure. This structure consists of the axis of structure as the backbone and fingers which are attached perpendicular to the axis. For this system, we consider an arbitrary initial condition, in the presen
Brazilian Journal of Physics. Publicado em: 2009-08
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7. 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
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8. Processos estocásticos em física: teoria e fundamentos
This work discusses some problems in physics using the language of stochastic processes. Firstly, we discuss the relationships between the formalisms of master equations, path integrals, and jumping processes. Each of them is a different prescription to define a Markovian process. Using these formalisms, we discuss the applicability of the classic Langevin m
Publicado em: 2009
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9. Extração de preferências por meio de avaliações de comportamentos observados. / Preference elicitation using evaluation over observed behaviours.
Recently, computer systems have been delegated to accomplish a variety of tasks, when the computer system can be more reliable or when the task is not suitable or not recommended for a human being. The use of preference elicitation in computational systems helps to improve such delegation, enabling lay people to program easily a computer system with their ow
Publicado em: 2009
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10. Langevin simulations with colored noise and non-Markovian dissipation
The nonequilibrium dynamics of an homogeneous scalar field is studied using Langevin equations. Microscopic derivations based on quantum field theory methods can lead to complicated nonlocal equations of motion. Here we study, numerically, the results obtained by appropriately approximating these equations in a local form (the Markovian approximation) and co
Brazilian Journal of Physics. Publicado em: 2008-09
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11. Modelling and evaluation of industrial plants useful life extension / Modelagem e avaliação da extensão da vida útil de plantas industriais
During the useful life of an industrial plant, the failure occurrence follows an exponential distribution. However, the aging process in an industrial plant generates an increase of the failure number. The failure probability is a rating for the maintenance stopping process. In this paper, an statistical method for the assessment of the failure probability a
Publicado em: 2008
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12. Non-local effects at the onset of the chiral transition
Inspired by analytic results obtained for a systematic expansion of the memory kernel in dissipative quantum mechanics, we propose a phenomenological procedure to incorporate non-markovian corrections to the Langevin dynamics of an order parameter in field theory systematically. In this note, we restrict our analysis to the onset of the evolution. As an exam
Brazilian Journal of Physics. Publicado em: 2007-07