Delay Differential Equations
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. Optimization of the Size of Thread Pool in Runtime Systems to Enterprise Application Integration: A Mathematical Modelling Approach
RESUMO As empresas buscam alternativas tecnológicas que proporcionem competitividade para seus processos de negócios. Uma delas é a integração de plataformas, ferramentas de software que constroem soluções de integração, que permitem que os diferentes aplicativos que compõem o ecossistema de software trabalhem de forma síncrona e que novas aplica�
TEMA (São Carlos). Publicado em: 03/06/2019
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2. Estudo da dinâmica de um oscilador amortecido com retroalimentação retardada / Study of teh dynamics of the damped oscillator with delayed feedback
A dinâmica da equação diferencial com retardo x 2 pontos + 2ax ponto + bx = f(x ), para a função não linear f(x) = tanh(x), foi analisada como função dos parâmetros a, b, e do retardo , onde x = x(t ). Esse modelo descreve um oscilador harmônico amortecido sujeito a retroalimentação com retardo . Nesse estudo, examinamos os casos de retroalimenta
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/02/2011
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3. Stability and boundedness of solutions of a kind of third-order delay differential equations
This paper studies the stability and boundedness of solutions of certain nonlinear third-order delay differential equations. Sufficient conditions for the stability and boundedness of solutions for the equations considered are obtained by constructing a Lyapunov functional. Mathematical subject classification: 34K20.
Computational & Applied Mathematics. Publicado em: 2010
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4. Critical behavior of the delay-induced chaos transition in a nonlinear model for the immune response
In this paper we analyze a model for the dynamics of the immune system interacting with a target population. The model consists in a set of two-dimensional delayed differential equations. The model is effectively infinite dimensional due to the presence of the delay and chaotic regimes can be supported. We show that a delayed response induces sustained oscil
Brazilian Journal of Physics. Publicado em: 2009-08
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5. The bounded solutions to nonlinear fifth-order differential equations with delay
In this paper, we improve some boundedness results, which have been obtained with respect to nonlinear differential equations of fifth order without delay, to a certain functional differential equation with constant delay. We give an illustrative example and also verify our main result by means of Liaponov tecnique.
Computational & Applied Mathematics. Publicado em: 2009
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6. Funções s-assintoticamente periódicas em espaços de Banach e aplicações à equações diferenciais funcionais / S-asymptotically periodic functions on Banach spaces and applications for functional differential equations
This work is devoted to the study of the class of continuous and bounded functions f : [0 INFINIT) ARROWX for which there exists omega>0 such that limt IND.t ARROWINFINIT(f(t + omega!) - f(t)) = 0 (in the sequel called S-asymptotically !-periodic functions). We discuss qualitative properties and establish some relationships between this type of functions and
Publicado em: 2009
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7. Controlabilidade e estabilização de sistemas de controle hereditários distribuídos lineares a tempo-variando / Controllability and stabilizability of linear time-varying distributed hereditary control systems
Neste trabalho estudamos a controlabilidade e a estabilização de certos tipos de sistemas com retardo. Obtemos um resultado de estabilização para sistema com retardo periódicos e um resultado que nos permite concluir a controlabilidade do sistema com retardo baseado na controlabilidade do mesmo sistema porém, sem retardo. Apresentamos a equação do ca
Publicado em: 2009
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8. Teoria de semigrupos e aplicações a equações impulsivas com retardamento dependendo do estado / Semigroup theory and applications to impulsive differential equation with state-dependent delay
In this work we stablish the existence of mild solutions for an impulsive abstract functional differential equation with state-dependent delay described in the form x POT. PRIME(t) = Ax(t) + f(t;x IND. p(t, xt)), t BELONGSI = [0,a], x IND. 0=\varphi IS CONTAINEDB, DELTAx(t IND. i) = I IND.ii(x IND.i); i = 1, ...n, where A is the infinitesimal generator of a
Publicado em: 2006
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9. Numerical treatment of boundary value problems for second order singularly perturbed delay differential equations
In this paper, the boundary value problems for second order singularly perturbed delay differential equations are treated. A generic numerical approach based on finite difference is presented to solve such boundary value problems. The stability and convergence analysis of the method is studied. The solution of the boundary value problems when delay is zero,
Computational & Applied Mathematics. Publicado em: 2005-08
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10. Sistemas impulsivos com retardamento: soluções periódicas. / Periodic solutions of an impulsive differential system with delay: an Lp approach.
We prove the existence of periodic solutions of some retarded functional differential equations subjected to impulsive self-supporting conditions. Due to the impulses, solutions exhibit discontinuites of the first kind and this forces the consideration of more general phase spaces than C([-r,0],Rn). We show that periodic solutions can emanate from the origin
Publicado em: 2000
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11. Quasiperiodicity route to chaos in a biochemical system.
The numerical study of a glycolytic model formed by a system of three delay differential equations reveals a quasiperiodicity route to chaos. When the delay changes in our biochemical system, we can observe the emergence of a strange attractor that replaces a previous torus. This behavior happens both under a constant input flux and when the frequency of the
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12. Dynamic regulation of the tryptophan operon: A modeling study and comparison with experimental data
A mathematical model for regulation of the tryptophan operon is presented. This model takes into account repression, feedback enzyme inhibition, and transcriptional attenuation. Special attention is given to model parameter estimation based on experimental data. The model's system of delay differential equations is numerically solved, and the results ar
The National Academy of Sciences.