Matrices Mathematics
Mostrando 1-5 de 5 artigos, teses e dissertações.
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1. Numerical resolution of cone-constrained eigenvalue problems
Given a convex cone K and matrices A and B, one wishes to find a scalar λ and a nonzero vector x satisfying the complementarity system K ∋ x ⊥(Ax-λ Bx) ∈ K+. This problem arises in mechanics and in other areas of applied mathematics. Two numerical techniques for solving such kind of cone-constrained eigenvalue problem are discussed, namely, the Power
Computational & Applied Mathematics. Publicado em: 2009
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2. Um estudo sobre fatorações de matrizes e a resolução de sistemas lineares / A study on matrix factorization and the resolution of linear systems
Neste trabalho abordamos algumas fatorações de matrizes, com vistas à resolução de sistemas lineares através de métodos diretos. Enfocamos particularmente as decomposições LU, Cholesky e QR, cujo uso tem sido largamente difundido em implementações computacionais. Nosso objetivo é apresentar um texto didático, acessível a alunos de graduação,
Publicado em: 2008
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3. Estudo de fluxo de potencia com aplicação de metodos diretos na resolução de sistemas de equações lineares / Study of power flow with application of direct methods in the resolutions of systems of linear
Considering a large-scale and complex Brazil electric power system, the present work concerns the study of power flows, through simulations with the 30 and 118 bus system of the IEEE (Institute of Electrical and Electronics Engineers) applying the uncoupled methods and the direct methods of matrix decomposition...Note: The complete abstract is available with
Publicado em: 2008
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4. Avaliação educacional sistêmica na perspectiva dos testes de desempenho e de seus resultados
This study is based on a descriptive critical analysis of the National System for Basic Education Evaluation (Sistema Nacional de Avaliação da Educação Básica - SAEB) carried through on the basis of documentary bibliographical research. It took in consideration the tools applied to measure the achievement of fourth-grade students in Mathematics and Port
Publicado em: 2007
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5. Random matrices and quantum chaos
The theory of random matrices has far-reaching applications in many different areas of mathematics and physics. In this note, we briefly describe the state of the theory and two of the perhaps most surprising appearances of random matrices, namely in the theory of quantum chaos and in the theory of prime numbers.
The National Academy of Sciences.