Discrete Variables
Mostrando 13-24 de 91 artigos, teses e dissertações.
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13. Optimization of concrete I-beams using a new hybrid glowworm swarm algorithm
In this paper a new hybrid glowworm swarm algorithm (SAGSO) for solving structural optimization problems is presented. The structure proposed to be optimized here is a simply-supported concrete I-beam defined by 20 variables. Eight different concrete mixtures are studied, varying the compressive strength grade and compacting system. The solutions are evaluat
Lat. Am. j. solids struct.. Publicado em: 2014-12
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14. Florfenicol associado ou não ao cloprostenol no tratamento de retenção de placenta em vacas leiteiras
The aim of this study was to compare the reproductive efficiency in dairy cows with retained placenta (RP), treated with Florfenicol associated or not with Cloprostenol. One hundred and eight cows with RP from dairy herds in southern Minas Gerais state and northern São Paulo state, were included for this purpose. The experiment was designed in factorial 2X2
Arq. Bras. Med. Vet. Zootec.. Publicado em: 2014-02
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15. Global optimization of capacity expansion and flow assignment in multicommodity networks
This paper describes an exact algorithm to solve a nonlinear mixed-integer programming model due to capacity expansion and flow assignment in multicommodity networks. The model combines continuous multicommodity flow variables associated with nonlinear congestion costs and discrete decision variables associated with the arc expansion costs. After establishin
Pesqui. Oper.. Publicado em: 16/07/2013
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16. Daily counting of manufactured units sent for quality control: a bayesian approach
This paper presents the statistical modeling for daily counting statistics of units that arrive for quality inspection at a food company. Different Poisson regression models were considered in order to analyze the data collected, with a Bayesian focus. The main objective was to forecast the daily average count based on co-variables such as days of the week.
Pesqui. Oper.. Publicado em: 16/07/2013
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17. Least squares regression with errors in both variables: case studies
Analytical curves are normally obtained from discrete data by least squares regression. The least squares regression of data involving significant error in both x and y values should not be implemented by ordinary least squares (OLS). In this work, the use of orthogonal distance regression (ODR) is discussed as an alternative approach in order to take into a
Quím. Nova. Publicado em: 2013
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18. AN ANALYSIS OF IMPACTS OF PUBLIC EXPENDITURE ON POVERTY AND INEQUALITY IN THE BRAZILIAN / UMA ANÃLISE DOS IMPACTOS DE DESPESAS PÃBLICAS SOBRE A POBREZA E A DESIGUALDADE NOS ESTADOS BRASILEIROS
The state aims to meet social needs, promote an efficient use of resources and improve income distribution. However, the degree of income inequality in Brazil is still very high and is one of the main indicators of social inequality, thus requiring reexamining the mechanisms to protect people and promote socio-economic development. From this premise, this st
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/07/2012
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19. Uma nova abordagem para resolução de problemas de fluxo de carga com variáveis discretas / A new approach for solving load flow problems with discrete variables
Este trabalho apresenta uma nova abordagem para a modelagem e resolução de problemas de fluxo de carga em sistemas elétricos de potência. O modelo proposto é formado simultaneamente pelo conjunto de equações não lineares que representam as restrições de carga do problema e por restrições de complementaridade associadas com as restrições de oper
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 07/05/2012
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20. Estudo da identificação humana por meio da imaginologia dos seios frontais.
The aim of this study was to verify the applicability of parameters for human identification using the frontal sinuses, used by Tatlisumak et al. (2007), using axial and coronal reconstructions of CBCT and extraoral radiographs. From 58 dry disjointed skulls existing in the Management of Legal Medicine of Paraiba (PB-GEMOL) and University Center of Joao Pess
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/03/2012
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21. Efeito do exercício físico durante a gravidez sobre o fluxo sanguíneo feto-placentário e o crescimento fetal : ensaio controlado e aleatorizado / Effect of exercise during pregnancy on the blood flow fetal-placental and fetal growth : randomized controlled trials
Introduction: Fetal growth has always been one of the major concerns regarding the practice of exercise during pregnancy, with discussions on whether the redistribution of fetoplacental blood flow during physical exercise and the bypass of blood from the viscera to the muscles could lead to transitory fetal hypoxia. Objective: To study the. E effect of super
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/02/2012
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22. Fault-tolerant state estimation of linear Gaussian systems subject to additive faults
Owing to the need for the satisfaction of attributes such as safety, maintainability, and reliability in modern critical engineering devices, the design of automatic feedback control systems has increasingly demanding fault-tolerant methods. In particular, if the system states cannot directly be measured by the available suite of sensors, a fault-tolerant st
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/08/2011
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23. Otimização topológica e paramétrica de vigas de concreto armado utilizando algoritmos genéticos. / Topology and shape optimization of concrete beams by genetic algorithms
This work presents a study and application using Genetic Algorithms (GAs) to solve problems that optimization structures, more specifically concrete beans. The GAs are search algorithms, non-deterministics that works with a population of solutions. Its inspired on the evolutions theory of the species to solve problems. In this dissertation sought to show the
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/05/2011
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24. Resolução do problema de fluxo de potência ótimo com variáveis de controle discretas / Resolution of optimal power flow problem with discrete control variables
O objetivo de um problema de Fluxo de Potência Ótimo é determinar o estado de um sistema de transmissão de energia elétrica que otimize um dado desempenho do sistema, e satisfaça suas restrições físicas e operacionais. O problema de Fluxo de Potência Ótimo é modelado como um problema de programação não linear com variáveis discretas e contín
Publicado em: 2011