Interior Points Method
Mostrando 1-12 de 24 artigos, teses e dissertações.
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1. Optimization of structures subjected to dynamic load: deterministic and probabilistic methods
Abstract This paper deals with the deterministic and probabilistic optimization of structures against bending when submitted to dynamic loads. The deterministic optimization problem considers the plate submitted to a time varying load while the probabilistic one takes into account a random loading defined by a power spectral density function. The correlation
REM, Int. Eng. J.. Publicado em: 2016-09
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2. Iteração continuada aplicada ao método de pontos interiores / Continued iteration applied to interior points method
Interior point methods have been widely used in the solution of large linear programming problems. The predictor corrector method, among ali interior point variants, is one of mostly used due to its efficiency and convergence properties. This method needs the solution of two linear systems to determine the predictor corrector direction, in each iteration. So
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/04/2012
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3. Determination of the reinforced concrete slabs ultimate load using finite element method and mathematical programming
In the present paper, the ultimate load of the reinforced concrete slabs [16] is determined using the finite element method and mathematical programming. The acting efforts and displacements in the slab are obtained by a perfect elasto-plastic analysis developed by finite element method. In the perfect elasto-plastic analysis the Newton-Raphson method [20] i
Latin American Journal of Solids and Structures. Publicado em: 2012
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4. Métodos de pontos interiores aplicados ao pré-despacho com restrições de segurança / Interior point methods applied to the pre-dispatch problem considering security constraints
Neste trabalho os métodos de pontos interiores primais-duais são utilizados para minimizar as perdas técnicas de energia na geração e transmissão de um sistema de potência hidrotérmico. A estrutura matricial resultante é explorada, objetivando uma implementação eficiente do ponto de vista de tempo de processamento, e robusto, do ponto de vista num
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/03/2010
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5. On the global convergence of interior-point nonlinear programming algorithms
Carathéodory's lemma states that if we have a linear combination of vectors in n, we can rewrite this combination using a linearly independent subset. This lemma has been successfully applied in nonlinear optimization in many contexts. In this work we present a new version o
Computational & Applied Mathematics. Publicado em: 2010-06
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6. Contaminação biológica e o uso de animais de montaria no Parque Nacional da Serra do Cipó - MG / Biological contamination and horse hiding in the Serra do Cipó National Park MG
Serra do Cipó National Park has undergone a major management challenge that is the definition of the use of horse riding by the visitors. Recently, the Brazilian Government launched a document entitled Diretrizes para visitação em unidades de conservação (Guidelines for visitation in protected areas) which dictates certain rules for recreation ecology a
Publicado em: 2010
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7. Estudo teórico experimental da dinâmica de temperatura no interior de uma cavidade cilíndrica. / EXPERIMENTAL THEORETICAL STUDY OF DYNAMIC TEMPERATURE AT A CYLINDRICAL
Two methods for solving a direct heat diffusion problem inside a cylindrical enclosure are proposed, each one is applied with a linear and plus a non-linear solution. Besides, a experimental apparatus was developed for theoretical models validation purpose. Furthermore, as an application of the proposed system the inverse analysis (inverse problem) is used t
Publicado em: 2010
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8. Estrategias de segunda ordem para problemas de complementaridade / Second order strategies for complementarity problems
In this work we reformulate the generalized nonlinear complementarity problem (GNCP) in polyhedral cones as a nonlinear system with nonnegativity in some variables and propose the resolution of such reformulation through interior-point methods. In particular we define two algorithms and prove the local convergence of these algorithms under standard assumptio
Publicado em: 2009
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9. Determinação da distribuição de temperatura transiente no tempo em elementos estruturais utilizando o metodo dos elementos de contorno / Determination of transient temperature distribution in structural elements using the boundary elements method
The Boundary Elements Method was employed in the study of the transient effect of the temperature in heat conduction problems for plain elements. The purpose was to present a formulation using linear continuous or discontinuous boundary elements with nodal parameters fixed at the ends of elements. The collocations points were positioned at the ends of contin
Publicado em: 2009
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10. Boundary Element Method for Electrical Impedance Tomography / Método dos elementos de contorno para tomografia de impedância elétrica
The Electrical Impedance Tomography (EIT) is a quite new technique and has proved to be promising in obtaining inner body images exploring the differences between electric qualities (conductivity and permissity) of different materials that constitute it. The technique is based on applying an electric potential profile or electric current on the boundary of t
Publicado em: 2009
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11. Otimização de fluxo de potência em redes elétricas com o UPFC. / Optimization of the power flow at electrical networks with the UPFC.
Neste trabalho abordamos o equipamento UPFC, pertencente à família FACTS, adequado ao estudo do regime permanente de sistemas de potência, sendo descritos modelos com diferentes níveis de detalhamento, assim como sua associação com a rede elétrica. Uma proposição alternativa para o modelamento do UPFC foi apresentada, sendo discutidos seus aspectos
Publicado em: 2008
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12. DEVELOPMENT OF A METHODOLOGY FOR THE COORDINATION HYDROTHERMAL-TERM IN ELECTRIC MARKET COMPETITIVE / Desenvolvimento de uma metodologia para a coordenação hidrotérmica de longo prazo em mercado elétrico competitivo
In this work a methodology based on linear programming for long-term hydrothermal scheduling of electric power systems is proposed. The objective of the hydrothermal scheduling is to find an optimal operation for a specific time interval and with high reliability and minimum cost. That is equivalent to determine an optimal generation scheduling for the power
Publicado em: 2007