Exchange Algorithms
Mostrando 1-12 de 19 artigos, teses e dissertações.
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1. Classical Methods and Calculation Algorithms for Determining Lime Requirements
ABSTRACT The methods developed for determination of lime requirements (LR) are based on widely accepted principles. However, the formulas used for calculation have evolved little over recent decades, and in some cases there are indications of their inadequacy. The aim of this study was to compare the lime requirements calculated by three classic formulas and
Rev. Bras. Ciênc. Solo. Publicado em: 09/03/2017
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2. An experimental study of variable depth search algorithms for the quadratic assignment problem
This paper introduces a new variable depth search method for the Quadratic Assignment Problem. The new method considers the cost of edges assignment as the criterion to decide which vertices to exchange during local search moves. It also presents the results of an extensive experimental study that compares the performance of local search and variable depth s
Pesquisa Operacional. Publicado em: 03/04/2012
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3. GENETIC-NEURAL MODEL FOR PORTFOLIO OPTIMIZATION WITH FINANCIAL OPTIONS IN THE BRAZILIAN MARKET / MODELO GENÉTICO-NEURAL PARA OTIMIZAÇÃO DE CARTEIRAS COM OPÇÕES FINANCEIRAS NO MERCADO BRASILEIRO
This dissertation develops an intelligent, quantitative and probabilistic model to determine an optimal composition of a portfolio consisting of a financial asset and options over this asset. Initially we studied the characteristics of the historical distribution of returns and volatility of the most liquid stocks from the BOVESPA Stock Exchange, from Januar
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/02/2011
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4. Optimal treatment choice and blocking for the construction of fractional factorial designs / Escolha de tratamentos e blocagem otimizados na construÃÃo de fatoriais fracionÃrios
This work deals with implementing exchange and interchange algorithms. Efficiency based optimality criteria were used to and optimal fractional factorials for response surface designs. Both treatment choice and blocking were considered. Designs found for each situation were compared to alternatives from literature. In all cases A-optimal or D-optimal designs
Publicado em: 2009
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5. MÉTODOS PARA OTIMIZAÇÃO DOS AJUSTES DOS REGULADORES DE TENSÃO E ZONAS DE TAP EM SISTEMAS DE DISTRIBUIÇÃO / METHODS FOR OPTIMIZATION OF THE VOLTAGE REGULATORS AND TAP ZONES IN DISTRIBUTION SYSTEMS
The new regulations in the electric sector utilities have have requested greater efficiency and quality both in terms of continuity and in conformity of the energy supplied. Electrical equipments quality, efficiency and useful life depend directly of the power quality supplied. In addition to operation of equipments, supply of energy within the limits must b
Publicado em: 2009
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6. Detecção Automática de Ondas de Elliott em Mercado Acionário / Automatic Identification of Elliott Waves in Stocks Market
The Elliott Wave analysis is a technique developed for the prediction of prices of financial assets (stocks, exchange rates etc.). This work introduces the basic concepts of the financial market, focusing mainly on the Elliott Wave principle, which differs from other techniques for providing direction and intensity of changes in shares / stocks prices in the
Publicado em: 2008
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7. Um protocolo de roteamento para redes sem fio adaptável por regras de aplicação
The exchange of information among the layers of the communication stack has been frequently used in Wireless Sensor Networks (WSNs) to increase the performance of the network. Such interaction among layers enhances the reliability and eciency of the communication, despite the severely restricted resources found on sensor nodes. However, such optimizations im
Publicado em: 2006
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8. Application of Fuzzy Logic in the Production of Penicillin G Acylase in Bacillus megaterium Cultivations. / Aplicação da lógica fuzzi na produção de penicilina G Acilase em cultivos de Bacillus megaterium.
Penicillin G acylase (PGA) is an important enzyme for the pharmaceutical industry. This enzyme has industrial use in the hydrolysis of penicillin G to obtain 6-aminocephalosporanic acid (6-APA), essential intermediate for the production of beta-lactam antibiotics. Many microorganisms produce PGA, but Bacillus megaterium is one of the few that excretes the en
Publicado em: 2003
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9. SEQUENTIAL AND PARALLEL STRATEGIES OF GRASP WITH PATH-RELINKING FOR THE 2-PATH NETWORK DESIGN PROBLEM / ESTRATÉGIAS SEQÜENCIAIS E PARALELAS DE GRASP COM RECONEXÃO POR CAMINHOS PARA O PROBLEMA DE SÍNTESE DE REDES A 2-CAMINHOS
Let G = ( V, E) be a connected undirected graph , where V is the set of nodes and E denotes the set of edges. A 2- path between nodes (s,t)is a sequence of a most two edges connecting them. Given a non-negative weight function associated with edges of G and a set D of origin- destination pairs of nodes, the 2-path network design problem (2PNDP) consists in f
Publicado em: 2003
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10. Modelagem e simulação de purificação de cefalosporina C em coluna de leito fixo
In the "cephalosporin C" production process, the purification is the second step, after the antibyotic been produced by Cephalosporium acremonium in submerged cultures. The purification is carried on in ionic exchange columns. In this work a mathematical model to describe the adsorption process is suggested. The model was obtained from a mass balance and kin
Publicado em: 1996
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11. Cross-cultural evidence of cognitive adaptations for social exchange among the Shiwiar of Ecuadorian Amazonia
On the basis of evolutionary game theory, it was hypothesized that humans have an evolved cognitive specialization for reasoning about social exchange, including a subroutine for detecting cheaters. This hypothesis led to a specific prediction: Although humans are known to be poor at detecting potential violations of conditional rules in general, they should
National Academy of Sciences.
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12. Analysis of saturation transfer electron paramagnetic resonance spectra of a spin-labeled integral membrane protein, band 3, in terms of the uniaxial rotational diffusion model.
Algorithms have been developed for the calculation of saturation transfer electron paramagnetic resonance (ST-EPR) spectra of a nitroxide spin-label assuming uniaxial rotational diffusion, a model that is frequently used to describe the global rotational dynamics of large integral membrane proteins. One algorithm explicitly includes terms describing Zeeman o