Parametrization
Mostrando 1-12 de 78 artigos, teses e dissertações.
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1. Mathematical Modeling and Parameter Estimation of Battery Lifetime using a Combined Electrical Model and a Genetic Algorithm
RESUMO Neste artigo é proposta uma metodologia baseada na meta-heurística Algoritmo Genético para estimar os parâmetros no modelo Chen e Rincón-Mora, sendo este aplicado na modelagem matemática do tempo de vida de baterias de Lítio-íon Polímero. O modelo também é parametrizado a partir da metodologia convencional, que necessita de dados obtidos po
TEMA (São Carlos). Publicado em: 06/06/2019
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2. Parametrization of the Davis Growth Model using data of crossbred Zebu cattle
ABSTRACT: The system of differential equations proposed by Oltjen et al. [1986, named Davis Growth Model (DGM)] to represent cattle growth has been parameterized with data from Bos taurus (British) and Bos indicus (Nellore) breeds. The DGM has been successfully used for simulation and decision support in the United States. However, the effect of about 30 yea
Sci. agric. (Piracicaba, Braz.). Publicado em: 2017-02
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3. AN ALTERNATIVE REPARAMETRIZATION FOR THE WEIGHTED LINDLEY DISTRIBUTION
ABSTRACT Recently,12 introduced a generalization of a one parameter Lindley distribution and named it as a weighted Lindley distribution. Considering this new introduced weighted Lindley distribution, we propose a reparametrization on the shape parameter leading it to be orthogonal to the other shape parameter. In this alternative parametrization, we get a d
Pesqui. Oper.. Publicado em: 2016-08
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4. Unscented Kalman Filter for Determination of Spacecraft Attitude Using Different Attitude Parameterizations and Real Data
ABSTRACT The non-linear estimators are certainly the most important algorithms applied to real problems, especially those involving the attitude estimation of spacecraft. The purpose of this paper was to use real data of sensors to analyze the behavior of Unscented Kalman Filter (UKF) in attitude estimation problems when it is represented in different ways a
J. Aerosp. Technol. Manag.. Publicado em: 2016-03
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5. Spline Dynamic Matrix Controller : uma nova formulação de controladores preditivos lineares
In the field of dynamic simulation, an understanding of the dynamic behavior of chemical processes is important from both process design and process system perspectives. Several methodologies have been developed so far, such as Step Response (SR), Transfer Function (TF) and Discrete State Space representation (DSS). Such approaches, however, have some disadv
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
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6. Parametrização e validação do ciclo do carbono e do nitrogênio do modelo Century 4.5 com experimentos de longa duração em um argissolo do sul do Brasil / Century 4.5 carbon and nitrogen cycle model parametrization and validation with long-term experiments in an acrisol in the south of Brazil
O modelo Century simula a dinâmica da matéria orgânica do solo sob diferentes sistemas de manejo. O objetivo deste trabalho foi parametrizar e validar o modelo Century 4.5 em um Argissolo do RS. Foram utilizados estoques de C e de N observados em diferentes sistemas de culturas e preparos de solo de dois experimentos de longa duração instalados na déca
Publicado em: 2011
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7. Multiloop calculations with implicit regularization in massless theories
We establish a systematic way to calculate multiloop amplitudes of infrared safe massless models with Implicit Regularization (IR), with a direct cancelation of the fictitious mass introduced by the procedure. The ultraviolet content of such amplitudes have a simple structure and its separation permits the identification of all the potential symmetry violati
Brazilian Journal of Physics. Publicado em: 2010-06
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8. On the inverse problem in high-energy elastic hadron scattering and the applicability of a representation for the real part of the amplitude / Um estudo sobre o problema inverso do espalhamento elastico de hadrons em altas energias e a aplicabilidade de uma representacao para a parte real da amplitude
The theoretical description of high-energy elastic hadron scattering constitutes an open problem in both, the underlying quantum field theory of strong interactions (QCD) and the phenomenological context. In this work the inverse problem in elastic hadron scattering is discussed in the impact parameter and eikonal frameworks, specifically a study on the empi
Publicado em: 2010
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9. Optimization study of airfoil performance using genetic algorithms / Otimização de desempenho de aerofólios supercríticos: uma abordagem baseada em algoritmos genéticos
The objective of present study is analyze the multi-objective optimization applied to transonic airfoils project comparing different ways to define the objective functions. The optimization is evaluated by the genetic algorithm NSGA-II. The results is analyzed using metrics of diversity and optimality for multi-objective problems, which two are proposed. The
Publicado em: 2009
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10. Incorporação quantitativa de dados de sismica 4D no processo de ajuste de historico / Quantitative incorporation of seismic 4D in history matching process
Good decision making related to oilfield management depends on reliability of production forecast which demands calibrated reservoir simulation models. Due to the complexity of the production history matching process, there are many models with reasonable match but, many times, with different forecasts, mainly due to important heterogeneities that are not ob
Publicado em: 2009
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11. Analytical, empirical and phenomenological aspects of elastic hadron scattering at high energies / Aspectos analiticos, empiricos e fenomenologicos do espalhamento elastico de hadrons em altas energias
We investigate high-energy elastic hadron scattering by means of three different approaches: analytical, empirical, and phenomenological. The first one is characterized by the fundamental principles of analyticity and crossing symmetry, polynomial limits for the scattering amplitude and dispersion relations. In special, for classes of functions of physical i
Publicado em: 2009
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12. Interger fatorization and groups on conics / Fatoração de inteiros e grupos sobre conicas
The objective of this paper is to factorize integer number using rational points on the unitary circle. Also, it intends to determinate some groups on the conics. The research begins with the basic concepts of Algebra and Number Theory ensuring that the rational points set on the unitary circle has a structure of group. From this set is possible to extend th
Publicado em: 2009