Global Minimization
Mostrando 1-12 de 39 artigos, teses e dissertações.
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1. O gigante dos pés de barro: capitalismo e desenvolvimento sustentável / THE FEET OF CLAY GIANT: Capitalism and Sustainable Development
This study resulted from many years of reflexion about big socio-environmental problems that gain more notoriety from 1960s decade and now, had occupied a central place in the academic debates and the society in general. The investigation has as central problem, to verify the contradictions, inconsistencies, conflicts and weaknesses all around the concept, a
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/10/2012
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2. Método da minimização da energia de Gibbs para a modelagem do equilíbrio químico e de fases no processo reacional do biodiesel / Method of minimization of Gibbs energy for the modeling of simultaneous chemical and phase equilibrium in reaction system for biodiesel production process
O presente trabalho tem como objetivo o estudo e aplicação da metodologia da minimização da energia de Gibbs no sistema para o cálculo do equilíbrio de fases, com e sem reação química, para o sistema reacional do biodiesel, utilizando técnicas de otimização global aliadas ao software GAMS, ferramenta computacional utilizada nesta pesquisa. Desse
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/03/2012
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3. Global convergence of a regularized factorized quasi-Newton method for nonlinear least squares problems
In this paper, we propose a regularized factorized quasi-Newton method with a new Armijo-type line search and prove its global convergence for nonlinear least squares problems. This convergence result is extended to the regularized BFGS and DFP methods for solving strictly convex minimization problems. Some numerical results are presented to show efficiency
Computational & Applied Mathematics. Publicado em: 2010-06
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4. A reliable procedure to predict salt precipitation in pure phases
This article proposes a new procedure to compute solid-liquid equilibrium in electrolyte systems that may form pure solid phases at a given temperature, pressure, and global composition. The procedure combines three sub-procedures: phase stability test, minimization of the Gibbs free energy with a stoichiometric formulation of the salt-forming reactions to c
Brazilian Journal of Chemical Engineering. Publicado em: 2010-03
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5. Optimal reconfiguration of the electric power distribution systems using a modified ant colony system algorithm / Reconfiguração ótima de sistemas de distribuição de energia elétrica baseado no comportamento de colônias de formigas
O objetivo deste trabalho é apresentar uma nova abordagem para obtenção de configurações para sistemas de distribuição de energia elétrica com o intuito de minimizar o valor de perdas ativas sem violar as restrições operacionais. Para isso, considera-se que os sistemas de distribuição estão operando em regime permanente e que suas fases estão e
Publicado em: 2010
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6. Existence and stability of solutions of type solitary waves in equation Korteweg-de Vries (KdV) / Existência e estabilidade de Soluções do tipo ondas solitárias para a equação Korteweg-de Vries (KdV)
In this paper we demonstrate a theorem of Well-Posedness Local and followed by Well-Posedness Global Equation Korteweg-de Vries in Sobolev spaces by making use of conservation laws of this equation, the properties of the group associated with it, and some estimates obtained by Kenig , Ponce and Vega in [6]. We also demonstrated the existence and stability of
Publicado em: 2009
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7. Modelo de avaliação do gerenciamento de resíduos de serviços de saúde (RSS) com uso de indicadores de desempenho: estudo de caso - Santa Casa de São Carlos-SP / Model of evaluation of healthcare waste using performance indicators: case of Santa Casa de São Carlos - SP
Healthcare Waste (HW) management has been focused to safer handling and to the guidelines given to workers of health establishment to obtain the correct procedures considering the legal requirements to ensure two main objectives: the segregation appropriate where the RSS are generated and minimization of incorrect disposal of waste within the establishment g
Publicado em: 2009
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8. Empresas brasileiras na China: estratégia e gestão / Brazilian companies in China: strategy and management
Globalization has had many consequences for the world economy governance, particularly orchestrating an economic reordering in which emerging countries have taken a much more prominent role. This role can be seen also by the rise of large multinational companies based in those countries. China and Brazil are two important examples of countries that have gain
Publicado em: 2009
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9. Monitoramento por dgps e análise dos processos erosivos da linha de costa na praia de Pirangi do Norte - Parnamirim / RN
Through out the course of a steady increase in search and recovery of space in the coastal zone, there is also an expanding concern about the erosion processes of this area. The main problem in coastal areas is that urbanization occurs in a disorderly fashion and unsustainable, further aggravating the problems of coastal dynamics. The study area of this work
Publicado em: 2009
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10. Sistema biométrico híbrido para verificação de assinaturas manuscritas / Hybrid biometric handwritten signature verification system
Through this document the development of a new hybrid on/off-line signature verification system is described, where the dynamic reference data is acquired by either a tablet or an instrumented pen and it is used to support the corresponding static signal (image). The signatures are segmented according to the complexity of their constituent strokes based upon
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/12/2008
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11. Parameter estimation for VLE calculation by global minimization: the genetic algorithm
Vapor-liquid equilibrium calculations require global minimization of deviations in pressure and gas phase compositions. In this work, two versions of a stochastic global optimization technique, the genetic algorithm, the freeware MyGA program, and the modified mMyGA program, are evaluated and compared for vapor-liquid equilibrium problems. Reliable experimen
Brazilian Journal of Chemical Engineering. Publicado em: 2008-06
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12. A new algorithm of nonlinear conjugate gradient method with strong convergence
The nonlinear conjugate gradient method is a very useful technique for solving large scale minimization problems and has wide applications in many fields. In this paper, we present a new algorithm of nonlinear conjugate gradient method with strong convergence for unconstrained minimization problems. The new algorithm can generate an adequate trust region rad
Computational & Applied Mathematics. Publicado em: 2008