24 resultados para state dependence


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Dissertação para obtenção do Grau de Mestre em Genética Molecular e Biomedicina

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Dissertação apresentada na Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa para a obtenção do Grau de Mestre em Engenharia Informática

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Journal of Cleaner Production, nº 17, p. 36-52

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African Studies Review, Volume 52, Number 2, pp. 35–

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The aim of this contribution is to extend the techniques of composite materials design to non-linear material behaviour and apply it for design of new materials for passive vibration control. As a first step a computational tool allowing determination of macroscopic optimized one-dimensional isolator behaviour was developed. Voigt, Maxwell, standard and more complex material models can be implemented. Objective function considers minimization of the initial reaction and/or displacement peak as well as minimization of the steady-state amplitude of reaction and/or displacement. The complex stiffness approach is used to formulate the governing equations in an efficient way. Material stiffness parameters are assumed as non-linear functions of the displacement. The numerical solution is performed in the complex space. The steady-state solution in the complex space is obtained by an iterative process based on the shooting method which imposes the conditions of periodicity with respect to the known value of the period. Extension of the shooting method to the complex space is presented and verified. Non-linear behaviour of material parameters is then optimized by generic probabilistic meta-algorithm, simulated annealing. Dependence of the global optimum on several combinations of leading parameters of the simulated annealing procedure, like neighbourhood definition and annealing schedule, is also studied and analyzed. Procedure is programmed in MATLAB environment.

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Dissertação para obtenção do Grau de Mestre em Engenharia Electrotécnica e de Computadores Mestrado Integrado em Engenharia Electrotécnica e de Computadores

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Dissertação para obtenção do Grau de Mestre em Engenharia Mecânica

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Tese apresentada para cumprimento dos requisitos necessários à obtenção do grau de Doutor em Ciência Política, especialidade de Teoria e Análise Política.

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Dissertation to obtain the degree of master in Bioorganic

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Dissertation presented to obtain the PhD degree in Electrical and Computer Engineering - Electronics

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Dissertation submitted in partial fulfillment of the requirements for the Degree of Master of Science in Geospatial Technologies.

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J Biol Inorg Chem (2007) 12:691–698 DOI 10.1007/s00775-007-0219-9

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J Biol Inorg Chem (2006) 11: 307–315 DOI 10.1007/s00775-005-0077-2

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A Work Project, presented as part of the requirements for the Award of a Masters Degree in Finance from the NOVA – School of Business and Economics

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Dissertação para obtenção do Grau de Mestre em Bioquímica Estrutural e Funcional