Search
Now showing items 21-30 of 23234
Precision of yule-walker methods for the arma spectral model
(2004-12-01)
In this work a new method is proposed of separated estimation for the ARMA spectral model based on the modified Yule-Walker equations and on the least squares method. The proposal of the new method consists of performing ...
On the periodic solutions of a class of duffing differential equations
(2013-01-01)
In this work we study the periodic solutions, their stability and bifurcation for the class of Duffing differential equation mathematical equation represented where C > 0, ε > 0 and Λ are real parameter, A(t), b(t) and ...
On the dynamics of free and excited oscillations of a simple portal frame foundation
(Elsevier B.V., 2006-07-01)
In this paper we search for the dynamics of a simple portal structure in the free and in the periodic excitation cases. By using the Center Manifold approach and Averaging Method, we obtain results on both stability and ...
On the dynamics of free and excited oscillations of a simple portal frame foundation
(Elsevier B.V., 2006-07-01)
In this paper we search for the dynamics of a simple portal structure in the free and in the periodic excitation cases. By using the Center Manifold approach and Averaging Method, we obtain results on both stability and ...
On the periodic solutions of a class of duffing differential equations
(2013-01-01)
In this work we study the periodic solutions, their stability and bifurcation for the class of Duffing differential equation mathematical equation represented where C > 0, ε > 0 and Λ are real parameter, A(t), b(t) and ...
Limit Cycles for a Class of Continuous and Discontinuous Cubic Polynomial Differential Systems
(Springer, 2014-04-01)
We study the maximum number of limit cycles that bifurcate from the periodic solutions of the family of isochronous cubic polynomial centers(x) over dot = y(-1 + 2 alpha x + 2 beta x(2)), (y) over dot = x + alpha(y(2) - ...
Limit cycles of some polynomial differential systems in dimension 2, 3 and 4, via averaging theory
(Taylor & Francis LtdAbingdonInglaterra, 2008)
O método do Avering via teoria do grau de Brouwer e aplicações
(Universidade Estadual Paulista (Unesp), 2011-02-18)
Nosso objetivo neste trabalho é estudar o método do averaging através do grau topológico de Brouwer e utilizá-lo para investigar o número de ciclos limites que bifurcam de uma singularidade do tipo centro quando perturbamos ...
On the dynamics of free and excited oscillations of a simple portal frame foundation
(Elsevier B.V., 2014)