Economic Programming
Mostrando 1-12 de 56 artigos, teses e dissertações.
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1. ECONOMIC ANALYSIS OF DIFFERENT HYDRAULIC SPRAYERS USED IN SUGARCANE (Saccharum spp.)
ABSTRACT Brazil is the largest sugarcane producer worldwide. In mills, sugarcane crops are sprayed with agrochemicals using self-propelled, tractor-driven, and aerial hydraulic sprayers. As sugarcane spraying is regularly performed over extensive areas, the machinery to be used should be planned and dimensioned to ensure timely operations without overloading
Eng. Agríc.. Publicado em: 25/04/2019
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2. Classical and stochastic mine planning techniques, state of the art and trends
Abstract Determination of the best possible ultimate pit for an open pit mine is a fundamental subject that has undergone a highly evolutionary process, reviewed in this study, since the correct choice carries substantial economic impact for the industry. The correct choice can be very beneficial for project analysis, whereas an incorrect choice has the pote
REM, Int. Eng. J.. Publicado em: 2018-04
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3. TOWARD PREDICTIVE MODELS FOR ESTIMATION OF BUBBLE-POINT PRESSURE AND FORMATION VOLUME FACTOR OF CRUDE OIL USING AN INTELLIGENT APPROACH
Abstract Accurate estimation of reservoirs fluid properties, as vital tools of reservoir behavior simulation and reservoir economic investigations, seems to be necessary. In this study, two important properties of crude oil, bubble point pressure (Pb) and formation volume factor (Bob), were modelled on the basis of a number of basic oil properties: temperatu
Braz. J. Chem. Eng.. Publicado em: 2016-12
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4. Linear Programming in the economic estimate of livestock-crop integration: application to a Brazilian dairy farm
ABSTRACT A linear programming mathematical model was applied to a representative dairy farm located in Brazil. The results showed that optimization models are relevant tools to assist in the planning and management of agricultural production, as well as to assist in estimating potential gains from the use of integrated systems. Diversification was a necessar
R. Bras. Zootec.. Publicado em: 2016-04
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5. AN EVOLUTIONARY STUDY ON CROP PRODUCTION IN SMALL FARM SYSTEMS IN THE MID-WEST REGION OF BRAZIL BASED ON A LINEAR PROGRAMMING MODEL
Based on an agro-technical study for the mid-west region of Brazil, and considering financial conditions like monthly expenses and long-term investments, a mixed integer and dynamic linear model has been proposed for representing crop production systems. This model establishes a monthly dynamic treatment of production and financial activities over a long-ter
Pesqui. Oper.. Publicado em: 2014-08
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6. A Mixed-Integer convex formulation for production optimization of gas-lifted oil fields with routing and pressure constraints
Production optimization of gas-lifted oil fields under facility, routing, and pressure constraints has attracted the attention of researchers and practitioners for its scientific challenges and economic impact. The available methods fall into one of two categories: nonlinear or piecewise-linear approaches. The nonlinear methods optimize simulation models dir
Braz. J. Chem. Eng.. Publicado em: 2014-06
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7. Simulation and economic analysis of bovine sex selection
A simulation model implemented in the programming software Delphi XE® was applied to evaluate sex selection in bovine. The hypothesis under investigation was that a dynamic model with stochastic and deterministic elements could detect the sexed semen technique to minimize pregnancy cost and to determine the adequate number of recipients required for in vivo
R. Bras. Zootec.. Publicado em: 2013-05
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8. Desafios e oportunidades da geração eólica e termelétrica a gás natural no Sistema Elétrico Peruano. / Challenges and opportunities of the wind generation and to natural gas thermal in the Peruvian Electricity System.
Several countries around the world have increasingly sought to diversify their electrical matrix in order to reduce dependence on fossil fuels and reduce emissions of gases responsible for worsening greenhouse effect in the atmosphere. As a result, has grown the participation of some renewable energy sources that until two decades ago did not occupied a prom
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/02/2012
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9. Heuristic for solving capacitor allocation problems in electric energy radial distribution networks
The goal of the capacitor allocation problem in radial distribution networks is to minimize technical losses with consequential positive impacts on economic and environmental areas. The main objective is to define the size and location of the capacitors while considering load variations in a given horizon. The mathematical formulation for this planning probl
Pesquisa Operacional. Publicado em: 05/04/2012
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10. Long-term planning of a container terminal under demand uncertainty and economies of scale
Governments of many developing countries are presently granting concessions to private organizations to operate container terminals. A key element in this process is the technical and economic evaluation of the project. In practice, the demand levels over time are volatile. The first part of the paper deals with a capacity expansion problem with stochastic d
Pesquisa Operacional. Publicado em: 03/04/2012
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11. Planejamento econômico para a industrialização e o desenvolvimento: o Brasil entre as lógicas de mercado e controle (1930-1956)
O trabalho é uma análise do contexto histórico em que o planejamento econômico nacional é aplicado para promover a industrialização da economia brasileira. Partindo dos resultados existentes, principalmente de que o Estado capitalista nascente no Brasil é condutor ativo deste processo, o texto busca estabelecer a relação deste fato com o fim do lai
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/12/2011
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12. Otimização térmica e econômica de bomba de calor para aquecimento de água, utilizando programação quadrática sequencial e simulação através do método de substituição Newton Raphson / Thermal and economic optimization of heat pump for heating water, using sequential quadratic programming and simulation by substitution Newton Raphson method
O trabalho apresenta metodologias computacionais de otimização e simulação para o desenvolvimento do projeto de um sistema de bomba de calor para aquecimento de água em prédios residenciais, especialmente para uso em banho na região de Campinas. O sistema bomba de calor foi simulado focando o estudo nos trocadores de calor (evaporador e condensador).
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/12/2011