Inverse Iteration
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. RELIABILITY-BASED MULTI-OBJECTIVE OPTIMIZATION APPLIED TO CHEMICAL ENGINEERING DESIGN
ABSTRACT Chemical engineering optimization represents a significant challenge due to the complexity of the mathematical models that are frequently required in this area. These models are normally associated with nonlinear equations that represent mass, energy, and momentum balances, which are submitted to physical, constitutive, environmental, and design lim
Braz. J. Chem. Eng.. Publicado em: 15/07/2019
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2. Implementação paralela do algoritmo iterativo de busca do parâmetro de regularização ótimo para o funcional de Tikhonov no problema de restauração de imagens / Parallel implementation of the iterative algorithm to search the optimal regularization parameter for the Tikhonov functional problem in image restoration
The use of techniques with the functional of Tikhonov in image processing has been widely used in recent years. The basic idea in this process is to modify an initial image using a convolution equation and to find a parameter which minimizes the function in order to obtain an aproximation of the original image. However, a typical problem in this method consi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/04/2012
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3. Uma abordagem de compressão de imagens através de sistemas de funções iteradas
A new image compression technique is proposed, based on the affine transformations (ATs) that define an iterated function system (IFS). Previous related research in the field has shown that an image may be approximated by iteratively subjecting a set of sub-regions to a group of ATs. In this case, the original image should be partitioned in regions, and each
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/08/2011
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4. A fast algorithm for inverse airfoil design using a transpiration model and an improved vortex panel method
A fast algorithm for inverse airfoil design using an efficient panel method for potential flow calculation is presented. The method employs linear vortex distributions on the panels and a consistent procedure for imposing the Kutta condition, thus eliminating the spurious aerodynamic loading that usually appears at a cusped trailing edge. The algorithm searc
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2007-12
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5. Recuperação de perfis verticais de propriedades óticas inerentes a partir da radiação emergente da água / Reconstruction of vertical profiles of inherent optical properties from upwelling water radiances
The current work proposes a metodology for the reconstruction of inherent optical properties of natural waters, vertical profiles of the absorption and scattering coefficients, from multispectral radiometric data of the radiation emerging from water. The radiative transfer direct model is solved by the LTSN method and bio-optical models are employed to corre
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/03/2006
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6. Reconstruction of vertical profiles of inherent optical properties from upwelling water radiances / Recuperação de perfis verticais de propriedades óticas inerentes a partir da radiação emergente da água
The current work proposes a metodology for the reconstruction of inherent optical properties of natural waters, vertical profiles of the absorption and scattering coefficients, from multispectral radiometric data of the radiation emerging from water. The radiative transfer direct model is solved by the LTSN method and bio-optical models are employed to corre
Publicado em: 2006
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7. Metodo de atualização multi-coluna inverso para sistemas não-lineares
In this work it is introduced new quasi-Newton methods for solving largescale nonlinear systems of equations. In these methods q (>1) columns of the approximation of the inverse Jacobian matrix are updated, in such a way that the q last secant equations are satisfied (when it is possible) at every iteration. The new methods obtained are called a q-Columns In
Publicado em: 2002
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8. Um estudo de placas sob cargas dinamicas estacionarias e com o efeito da não linearidade geometrica sob cargas estaticas usando o metodo dos elementos de contorno
The Boundary Element Method was used to study plates with small strain hypotheses under classical theory. The geometrical non-linearity effect was considered to obtain in plane critical loads for homogeneous and isotropic plates. On the other hand, the natural frequencies of the plates were computed using the free vibration theory. Several plates were analyz
Publicado em: 2001
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9. NUMERICAL SOLUTIONS FOR EIGENPROBLEMS ASSOCIATED TO SYMMETRIC OPERATORS / SOLUÇÃO NUMÉRICA DE AUTO-PROBLEMAS ASSOCIADOS A OPERADORES SIMÉTRICOS
Desenvolve-se uma técnica para a extração de auto-pares relacionados com a solução de problemas de Elementos Finitos. O algoritmo consiste no uso dos métodos da Iteração Inversa e Gradiente Conjugado para a obtenção do vetor solução associado ao menor auto-valor. As soluções do auto-sistema são calculadas sequencialmente pela modificação da
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/08/1985