Applied Computation
Mostrando 1-12 de 96 artigos, teses e dissertações.
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1. Service levels of highway toll plazas: the influence of factors on manual customer service
Abstract Paper aims To analyze service levels offered in a highway toll plaza and to test the influence of operational and human factors on manual customer service. Originality The methodology is an approach which involves systematic and efficient examination of multiple factors. This approach has been widely used in multiple areas; however, little researc
Prod.. Publicado em: 04/11/2019
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2. Validación del Índice de Calidad Formal como modelo para la evaluación de websites: el caso de la e-Administración local portuguesa
Abstract The results derived from a content analysis applied to websites from 308 municipalities in Portugal are discussed. Despite the name of the method (which could possibly lead to confusion), the study has exclusively focused on the formal parameters of online communication; that is, audiovisual appearance, information architecture, usability, accessibi
Transinformação. Publicado em: 2018-08
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3. Use of a combined SVD-Kalman filter approach for induction motor broken rotor bars identification
Abstract This paper describes a new parametric spectral estimator for the identification of rotor bar fault of an induction motor by analyzing the stator current. This approach combines two methods: The first one, the Singular Value Decomposition method which allows the accurate detection and location of the fault's signature frequency. The second method all
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2018-03
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4. MULTICRITERIA ANALYSIS OF FOOTBALL MATCH PERFORMANCES: COMPOSITION OF PROBABILISTIC PREFERENCES APPLIED TO THE ENGLISH PREMIER LEAGUE 2015/2016
ABSTRACT This article aims to analyze the technical performance of football teams in the FA Premier League during the 2015/2016 season. Data of twenty clubs over 38 matches for each club are considered using 23 variables. These variables have been explored in the football literature and address different features of technical performance. The different confi
Pesqui. Oper.. Publicado em: 2017-08
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5. Ultra Wide Band Radar Cross Section Reduction of a Perfectly Electric Conductor Sphere by the Application of Multilayer Metamaterial Coatings
Abstract A full-wave analytical method using the addition theorems and Hertzian potential functions are used to compute the radar cross section of a sphere coated by several layers composed of common materials and metamaterials. The minimization and maximization of radar cross section of a perfectly electric conductor sphere with such coatings are realized i
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2016-12
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6. Wavelength assignment using a hybrid evolutionary computation to reduce cross-phase modulation
In this paper, we propose a hybrid methodology based on Graph-Coloring and Genetic Algorithm (GA) to solve the Wavelength Assignment (WA) problem in optical networks, impaired by physical layer effects. Our proposal was developed for a static scenario where the physical topology and traffic matrix are known a priori. First, we used fixed shortest-path routin
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2014-06
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7. A hybrid method BEM-NRM for magnetostatics problems
This article proposes a new method to solve non-linear magnetostatic problems applied to the modeling of electromagnetic devices. A reduced scalar potential formulation is presented and solved by a hybrid BEM-NRM. It has been implemented and tested in a software called MaGot. We will show that the computation time of this new method is very low. Thus, it cou
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2013-12
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8. Computation of interactive effects and optimization of process parameters for alkaline lipase production by mutant strain of Pseudomonas aeruginosa using response surface methodology
Alkaline lipase production by mutant strain of Pseudomonas aeruginosa MTCC 10,055 was optimized in shake flask batch fermentation using response surface methodology. An empirical model was developed through Box-Behnken experimental design to describe the relationship among tested variables (pH, temperature, castor oil, starch and triton-X-100). The second-or
Braz. J. Microbiol.. Publicado em: 09/04/2013
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9. Performance of predictive models in phase equilibria of complex associating systems: PC-SAFT and CEOS/GE
Cubic equations of state combined with excess Gibbs energy predictive models (like UNIFAC) and equations of state based on applied statistical mechanics are among the main alternatives for phase equilibria prediction involving polar substances in wide temperature and pressure ranges. In this work, the predictive performances of the PC-SAFT with association c
Braz. J. Chem. Eng.. Publicado em: 2013-03
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10. Função de avaliação dinâmica em algoritmos genéticos aplicados na predição de estruturas tridimensionais de proteínas / Genetic Algorithms with Dynamic Fitness Functions Applied to Tridimensional Protein Structure Prediction
The protein structure prediction can be seen as an optimization problem where given an amino acid sequence, the tertiary protein structure must be found amongst many possible by obtaining energy functions minima. Many researchers have been proposing Evolutionary Computation strategies to find tridimensional structures of proteins; however results are not alw
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/09/2012
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11. 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
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12. A Review of Gradient Algorithms for Numerical Computation of Optimal Trajectories
Abstract: In this paper, two classic direct methods for numerical computation of optimal trajectories were revisited: the steepest descent method and the direct one based upon the second variation theory. The steepest descent method was developed for a Mayer problem of optimal control, with free final state and fixed terminal times. Terminal constraints on t
J. Aerosp. Technol. Manag.. Publicado em: 2012-06