Bounded Variation
Mostrando 1-12 de 18 artigos, teses e dissertações.
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1. Teoria geomÃtrica da medida e aplicaÃÃes / Geometric measure theory and aplications
O presente trabalho de mestrado visa estudar alguns dos trabalhos do matemÃtico italiano Ennio De Giorgi os quais fazem referÃncia a existÃncia e regularidade de superfÃcies mÃnimas mas estas nÃo contextualizadas integralmente no Ãmbito da Geometria Diferencial mas sim voltadas a um campo da matemÃtica a algumas dÃcadas implementada que a Teoria Geo
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/02/2011
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2. Atratores para uma classe de equações de vigas extensíveis fracamente dissipativas / Attractors for a class of equations of extensible beams weakly dissipative
This work contains some results on the existence, uniqueness and asymptotic behavior of solutions for a nonlinear beam equation of Kirchhoff type, u IND. tt+ DELTA POT. 2u+ M(INT. IND.|u| 2 dx) u + g(u IND. t) + f (u) = h; where R POT. Nis a bounded domain with smooth boundary . This equation is a model for small vibrations of extensible beams. The nonlocal
Publicado em: 2010
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3. Cohomologia e propriedades estocásticas de transformações expansoras e observáveis lipschitzianos / Cohomology and stochastics properties of expanding maps and lipschitzians observables
We prove the Central Limit Theorem for piecewise expanding interval transformations and observables with bounded variation, using the approach of J.Rousseau-Egele as described by A. Broise. This approach makes use of pertubations of the so-called Ruelle-Perron-Frobenius transfer operator. An original contribution is given in the last chapter, where we prove
Publicado em: 2007
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4. Eu fui e fiz esta tese : as construções do tipo foi fez no portugues do Brasil / I went and did this thesis (Lit) : the foi e fez (Lit. went and did) constructions in Brazilian Portuguese
The present thesis examines the foi fez constructions? (Lit. Went Did constructions), henceforth FFCs, in spoken Brazilian Portuguese. FFCs exhibit definite morphosyntactic properties associated to the uses of the verbs ir (go), chegar (arrive) e pegar (take) and they also play a specific role on the speech situation. This thesis is developed under the funct
Publicado em: 2006
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5. Estabilidade e controle de sistemas lineares variantes no tempo e de sistemas chaveados lineares
This thesis presents contributions to the solution of problems of stability analysis and control synthesis applied to linear systems with time-varying parameters belonging to a polytope and to switched linear systems subject to arbitrary switching functions using linear matrix inequality conditions based on Lyapunov functions. Concerning linear time-varying
Publicado em: 2005
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6. Robust control to parametric uncertainties in smart structures using linear matrix inequalities
The study of algorithms for active vibrations control in flexible structures became an area of enormous interest, mainly due to the countless demands of an optimal performance of mechanical systems as aircraft and aerospace structures. Smart structures, formed by a structure base, coupled with piezoelectric actuators and sensor are capable to guarantee the c
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2004-12
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7. Discrete approximations for strict convex continuous time problems and duality
We propose a discrete approximation scheme to a class of Linear Quadratic Continuous Time Problems. It is shown, under positiveness of the matrix in the integral cost, that optimal solutions of the discrete problems provide a sequence of bounded variation functions which converges almost everywhere to the unique optimal solution. Furthermore, the method of d
Computational & Applied Mathematics. Publicado em: 2004
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8. Geologia, petrografia e geoquimica de duas suites TTG do dominio norte do complexo campos gerais, sudoeste de Minas Gerais
South of Passos and Alpinópolis, in the southwestem region of Minas Gerais, there are at least two tonalitetrondhjemite-granodiorite suites (TIG) associated with the Morro do Ferro Greenstone Belt that is a part of the northern domain of the Campos Gerais Complex (CCG). The two TTG suítes studied here belong to the Serra do Dondó and Córrego das Almas be
Publicado em: 2004
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9. Spatio-temporal dynamics and transition from asymptotic equilibrium to bounded oscillations in Chrysomya albiceps (Diptera, Calliphoridae)
The sensitivity of parameters that govern the stability of population size in Chrysomya albiceps and describe its spatial dynamics was evaluated in this study. The dynamics was modeled using a density-dependent model of population growth. Our simulations show that variation in fecundity and mainly in survival has marked effect on the dynamics and indicates t
Memórias do Instituto Oswaldo Cruz. Publicado em: 2001-07
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10. Problemas variacionais geometricos
In this dissertation we treat two variational geometric problems: The Isoperimetric Problem and the Faber-Krahn Inequality. By means of the notions of functions of bounded variation and sets of finite perimeter (a la de Giorgi). we present the resolution of the first problem in the Euclidean space. We also make the computations for the variation formulae, wh
Publicado em: 2000
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11. On localization for double Fourier series
The localization theorems for Fourier series of functions of a single variable are classical and easy to prove. The situation is different for Fourier series of functions of several variables, even if one restricts consideration to rectangular, in particular square, partial sums. We show that the answer to the problem can be obtained by considering the notio
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12. Microsatellite Genetic Distances with Range Constraints: Analytic Description and Problems of Estimation
Statistical properties of the symmetric stepwise-mutation model for microsatellite evolution are studied under the assumption that the number of repeats is strictly bounded above and below. An exact analytic expression is found for the expected products of the frequencies of alleles separated by k repeats. This permits characterization of the asymptotic beha