Results 21 to 30 of about 38,020 (248)

Stability and Hopf bifurcation of a delayed diffusive phytoplankton-zooplankton-fish model with refuge and two functional responses

open access: yesAIMS Mathematics, 2023
In our paper, a delayed diffusive phytoplankton-zooplankton-fish model with a refuge and Crowley-Martin and Holling II functional responses is established.
Ting Gao, Xinyou Meng
doaj   +1 more source

Small aspect ratio Taylor-Couette flow: onset of a very-low-frequency three-torus state [PDF]

open access: yes, 2003
The nonlinear dynamics of Taylor-Couette flow in a small aspect ratio annulus (where the length of the cylinders is half of the annular gap between them) is investigated by numerically solving the full three-dimensional Navier-Stokes equations.
López Moscat, Juan Manuel   +1 more
core   +2 more sources

On the nonautonomous Hopf bifurcation problem [PDF]

open access: yesDiscrete & Continuous Dynamical Systems - S, 2016
Consider the two-dimensional system \[ \frac{dx}{dt}=f(x,\epsilon), \] where \(f(0,\epsilon)=0\). In the supercritical Andronov-Hopf theory, one imposes conditions to ensure that \(x=0\) is an exponentially asymptotically stable equilibrium point for \(\epsilon < 0\), and for small positive \(\epsilon\), there is an exponentially asymptotically stable ...
FRANCA, MATTEO   +2 more
openaire   +3 more sources

Hybrid control of Hopf bifurcation in a Lotka-Volterra predator-prey model with two delays

open access: yesAdvances in Difference Equations, 2017
In this paper, the Hopf bifurcation control for a Lotka-Volterra predator-prey model with two delays is studied by using a hybrid control strategy.
Miao Peng, Zhengdi Zhang, Xuedi Wang
doaj   +1 more source

Stability and Bifurcation for a Delayed Diffusive Two-Zooplankton One-Phytoplankton Model with Two Different Functions

open access: yesComplexity, 2021
In this paper, a diffusion two-phytoplankton one-zooplankton model with time delay, Beddington–DeAnglis functional response, and Holling II functional response is proposed.
Xin-You Meng, Li Xiao
doaj   +1 more source

Oscillations and secondary bifurcations in nonlinear magnetoconvection [PDF]

open access: yes, 1993
Complicated bifurcation structures that appear in nonlinear systems governed by partial differential equations (PDEs) can be explained by studying appropriate low-order amplitude equations.
A. M. Rucklidge   +13 more
core   +1 more source

Analysing panel flutter in supersonic flow by Hopf bifurcation [PDF]

open access: yesIranian Journal of Numerical Analysis and Optimization, 2014
This paper is devoted to study of a partial differential equation governing panel motion in supersonic flow. This PDE can be transformed to an ODE by means of a Galerkin method.
zahra Monfared, Zohre Dadi
doaj   +1 more source

Bifurcation Analysis and Sliding Mode Control of Chaotic Vibrations in an Autonomous System

open access: yesJournal of Applied Mathematics, 2014
We study the bifurcations and sliding mode control of chaotic vibrations in an autonomous system. More precisely, a Hopf bifurcation controller is designed so as to control the unstable subcritical Hopf bifurcation to the stable supercritical Hopf ...
Wenju Du   +5 more
doaj   +1 more source

On Local Bifurcations in Neural Field Models with Transmission Delays [PDF]

open access: yes, 2012
Neural field models with transmission delay may be cast as abstract delay differential equations (DDE). The theory of dual semigroups (also called sun-star calculus) provides a natural framework for the analysis of a broad class of delay equations, among
Janssens, Sebastiaan G.   +3 more
core   +1 more source

Influence of Time Delay on Bifurcation in Fractional Order BAM Neural Networks With Four Delays

open access: yesIEEE Access, 2019
Over the past several decades, numerous scholars have studied the stability and Hopf bifurcation problem of integer-order delayed neural networks. However, the fruits about the stability and Hopf bifurcation for fractional-order delayed neural networks ...
Changjin Xu   +3 more
doaj   +1 more source

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