Speed Of Convergence
Mostrando 1-12 de 29 artigos, teses e dissertações.
-
1. A Heuristic Algorithm Based on Line-up Competition and Generalized Pattern Search for Solving Integer and Mixed Integer Non-linear Optimization Problems
Abstract The global optimization of integer and mixed integer non-linear problems has a lot of applications in engineering. In this paper a heuristic algorithm is developed using line-up competition and generalized pattern search to solve integer and mixed integer non-linear optimization problems subjected to various linear or nonlinear constraints. Due to i
Lat. Am. j. solids struct.. Publicado em: 2016-02
-
2. Analyzing the Unscented Kalman Filter Robustness for Orbit Determination Through Global Positioning System Signals
ABSTRACT: The nonlinear unscented Kalman filter (UKF) is evaluated for the satellite orbit determination problem, using Global Positioning System (GPS) measurements. The assessment is based on the robustness of the filter. The main subjects for the evaluation are convergence speed and dynamical model complexity. Such assessment is based on comparing the UKF
J. Aerosp. Technol. Manag.. Publicado em: 2013-12
-
3. An accelerated incremental algorithm to trace the nonlinear equilibrium path of structures
This paper deals with the convergence acceleration of iterative nonlinear methods. An effective iterative algorithm, named the three-point method, is applied to nonlinear analysis of structures. In terms of computational cost, each iteration of the three-point method requires three evaluations of the function. In this study the effective functions have been
Lat. Am. j. solids struct.. Publicado em: 2012-08
-
4. DinÃmica salarial dos trabalhadores da agropecuÃria brasileira: uma anÃlise de dados espaciais (1992-2009) / Wage dynamics of the farming brazilian workers: an analysis of space data (1992-2009)
The objective of this work is to examine the wages differences dynamics of the farming sector temporary and permanent workers, through the analysis of the wage behavior in the Brazilian states on the period from 1992 to 2009. For this it was used the Space Data Exploratory Analysis (AEDE), the space econometrical modeling and as source of data the National R
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/06/2011
-
5. High-order unstructured spectral finite volume method for aerodynamic applications.
An implicit finite volume algorithm is developed for higher-order unstructured computation of inviscid compressible flows. The Spectral Finite Volume method is used to achieve high-order spatial discretization of the domain, coupled with a matrix-free LU-SGS algorithm to solve the linear systems arising from implicit time marching of the governing equations,
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/12/2010
-
6. High-order unstructured spectral finite volume method for aerodynamic applications.
An implicit finite volume algorithm is developed for higher-order unstructured computation of inviscid compressible flows. The Spectral Finite Volume method is used to achieve high-order spatial discretization of the domain, coupled with a matrix-free LU-SGS algorithm to solve the linear systems arising from implicit time marching of the governing equations,
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/12/2010
-
7. Free vibration analysis of an embarked rotating composite shaft using the hp-version of the FEM
This paper presents the study of the vibratory behavior of rotating composite shafts. The composite shaft contains isotropic rigid disks and is supported by bearings that are modeled as springs and viscous dampers. An hp-version of the Finite Element Method (FEM) is used to model the structure. A hierarchical finite element of beam type with six degrees of f
Latin American Journal of Solids and Structures. Publicado em: 2010
-
8. Development of mechanical, reliability and optimization models for application in reinforced concrete structures / Desenvolvimento de modelos mecânicos, de confiabilidade e de otimização para aplicação em estruturas de concreto armado
This work presents some developments in the mechanical modeling of reinforced concrete bar structures, as well in the coupling of reliability and RBDO optimization models, with the purpose of obtaining optimal dimensions considering the safety requirements specified in design. As for the mechanical modeling via Finite Element Method (FEM), in addition to geo
Publicado em: 2010
-
9. Características da precipitação pluviométrica do nordeste brasileiro e seus padrões de acoplamento com as TSM do Pacífico Equatorial e Atlântico Sul. / Rainfall characteristics in northeastern brazil and their patterns coupling with sst equatorial Pacific and South Atlantic.
The eastern coast of the Northeast Brazil (NEB) is a region where transient weather systems interact with local systems, modulating their frequency and intensity. Understanding the mechanisms of such interactions may be instrumental in explaining the observed precipitation patterns in this region. The objective of this work is quite within this scope and tak
Publicado em: 2010
-
10. Um Algoritmo Auxiliar Paralelo inspirado na Fertilização in Vitro para melhorar o desempenho dos Algoritmos Genéticos
Várias são as técnicas aplicadas em problemas de otimização. No entanto, poucas alcançam desempenho satisfatório quando o problema é complexo, por exemplo multimodal ou multiobjetivo. Entre as técnicas para otimização estão as metaheurísticas, algoritmos heurísticos de base empírica que não garantem a ótimo global mas, normalmente, encontram
Publicado em: 2010
-
11. Convergência da renda agropecuária em Minas Gerais, 1996-2006 / Agricultural income convergence in Minas Gerais, 1996-2006
In the last few years, Minas Gerais gradually increased its participation in national agricultural GDP. Currently, Minas Gerais is the main producer of coffee beans, milk, potatoes and garlic, also having the largest horses herd and the second largest cattle herd in the country. However, due to regional differences, the process of agricultural development ha
Publicado em: 2009
-
12. Economic growth and decomposition of inequality income in the state of Piaui / Crescimento econômico e decomposição da desigualdade de renda no estado do Piauí
This dissertation aimed to analyze income inequality amongst the municipalities of the state of Piaui in the period 1995 2007 by testing, initially, the validity of the Kuznets curve hypothesis and convergence of per capita income. Besides, it was analyzed a decomposition of Theil index based upon the factors: income, gender, race, education and development
Publicado em: 2009