Results 1 to 10 of about 1,961 (190)

Entropy Increase in Switching Systems [PDF]

open access: yesEntropy, 2013
The relation between the complexity of a time-switched dynamics and the complexity of its control sequence depends critically on the concept of a non-autonomous pullback attractor.
Ángel Giménez   +2 more
doaj   +3 more sources

Time-dependent saddle-node bifurcation: Breaking time and the point of no return in a non-autonomous model of critical transitions. [PDF]

open access: yesPhysica D, 2019
There is a growing awareness that catastrophic phenomena in biology and medicine can be mathematically represented in terms of saddle-node bifurcations.
Li JH, Ye FX, Qian H, Huang S.
europepmc   +2 more sources

The Existence of Weak D-Pullback Exponential Attractor for Nonautonomous Dynamical System [PDF]

open access: yesThe Scientific World Journal, 2016
First, for a process U(t,τ)∣t≥τ, we introduce a new concept, called the weak D-pullback exponential attractor, which is a family of sets M(t)∣t≤T, for any T∈R, satisfying the following: (i) M(t) is compact, (ii) M(t) is positively invariant, that is, U(t,
Yongjun Li, Xiaona Wei, Yanhong Zhang
doaj   +2 more sources

Upper Semicontinuity of Pullback Attractors for the 3D Nonautonomous Benjamin-Bona-Mahony Equations [PDF]

open access: yesThe Scientific World Journal, 2014
We will study the upper semicontinuity of pullback attractors for the 3D nonautonomouss Benjamin-Bona-Mahony equations with external force perturbation terms. Under some regular assumptions, we can prove the pullback attractors 𝒜ε(t) of equation ut-Δut-
Xinguang Yang   +3 more
doaj   +2 more sources

Pullback attractor for a nonlocal discrete nonlinear Schrödinger equation with delays

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2021
We consider a nonlocal discrete nonlinear Schrödinger equation with delays. We prove that the process associated with the non-autonomous model possesses a pullback attractor.
Jardel Pereira
doaj   +1 more source

Pullback attractors for non-autonomous 2D-Navier-Stokes equations in some unbounded domains [PDF]

open access: yes, 2006
In this Note we first introduce the concept of pullback asymptotic compactness. Next, we establish a result ensuring the existence of a pullback attractor for a non-autonomous dynamical system under the general assumptions of pullback asymptotic ...
Caraballo Garrido, Tomás   +2 more
core   +3 more sources

Random attractors for stochastic two-compartment Gray-Scott equations with a multiplicative noise

open access: yesOpen Mathematics, 2016
In this paper, we consider the existence of a pullback attractor for the random dynamical system generated by stochastic two-compartment Gray-Scott equation for a multiplicative noise with the homogeneous Neumann boundary condition on a bounded domain of
Jia Xiaoyao, Gao Juanjuan, Ding Xiaoquan
doaj   +1 more source

Degenerate pullback attractors for the 3D Navier-Stokes equations [PDF]

open access: yes, 2015
As in our previous paper, the 3D Navier-Stokes equations with a translationally bounded force contain pullback attractors in a weak sense. Moreover, those attractors consist of complete bounded trajectories.
Cheskidov, Alexey, Kavlie, Landon
core   +1 more source

Coupled nonautonomous inclusion systems with spatially variable exponents

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2021
A family of nonautonomous coupled inclusions governed by $p(x)$-Laplacian operators with large diffusion is investigated. The existence of solutions and pullback attractors as well as the generation of a generalized process are established.
Peter Kloeden, Jacson Simsen
doaj   +1 more source

A non-autonomous scalar one-dimensional dissipative parabolic problem: The description of the dynamics [PDF]

open access: yes, 2018
The purpose of this paper is to give a characterization of the structure of non-autonomous attractors of the problem $u_t= u_{xx} + \lambda u - \beta(t)u^3$ when the parameter $\lambda > 0$ varies.
Broche, Rita de Cássia D. S.   +2 more
core   +2 more sources

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