Results 71 to 80 of about 228,096 (272)
Hopf bifurcations to quasi-periodic solutions for the two-dimensional plane Poiseuille flow
, 2011 This paper studies various Hopf bifurcations in the two-dimensional plane Poiseuille problem. For several values of the wavenumber $\alpha$, we obtain the branch of periodic flows which are born at the Hopf bifurcation of the laminar flow.
Alavyoon +20 more
core +1 more source
Delay-induced Hopf bifurcation of an SVEIR computer virus model with nonlinear incidence rate
Advances in Differential Equations, 2018 We are concerned with the Hopf bifurcation of an SVEIR computer virus model with time delay and nonlinear incident rate. First of all, by analyzing the associated characteristic equation we obtain sufficient conditions for its local stability and the ...
T. Zhao, Zizhen Zhang, R. K. Upadhyay
semanticscholar +1 more source
Hopf bifurcation for functional equations
Journal of Mathematical Analysis and Applications, 1980 Abstract : The purpose of this paper is to study the existence of a smooth Hopf bifurcation for functional equations. The bifurcation parameters may include the delays. Results will be described for a special case of equations considered. (Author)
JoséCarlos F de Oliveira +2 more
openaire +2 more sources
International Journal of Mechanical System Dynamics, EarlyView.ABSTRACT Time delays frequently arise in active control systems due to sensor sampling, signal transmission, and actuator response, making their effects on system dynamics non‐negligible. This paper investigates how velocity feedback time delay influences the nonlinear dynamic characteristics of a maglev train subjected to unsteady aerodynamic forces ...
Jia‐Xuan Li, Zhi‐Wei Liu, Xiang Liu
wiley +1 more source
Kaldor, Hicks and Goodwin Meet the Supermultiplier: On Growth Cycles and Autonomous Demand
Metroeconomica, EarlyView.ABSTRACT This paper presents an approach to reconciling short‐run business cycles with long‐run growth in macroeconomic models. It addresses recent criticisms of supermultiplier models by developing a framework that combines investment‐driven cycles with autonomous demand‐led growth in the long run.
Ettore Gallo
wiley +1 more source
Hopf Bifurcations in a Watt Governor With a Spring
, 2008 This paper pursues the study carried out by the authors in "Stability and Hopf bifurcation in a hexagonal governor system", focusing on the codimension one Hopf bifurcations in the hexagonal Watt governor differential system.
Al-Humadi A +13 more
core +1 more source
Hopf-Takens bifurcations and centres
Journal of Differential Equations, 2004 The paper is concerned with a local study of \(C^{\infty }\) p-parameter families of planar vector fields of the form \[ X_{\lambda }(x,y)=(d(\lambda )x-y+f(x,y,\lambda ))\frac{\partial }{\partial x}+(x+d(\lambda )y+g(x,y,\lambda ))\frac{\partial }{\partial y}, \tag{1} \] near a nondegenerate elliptic point.
Freddy Dumortier, Magdalena Caubergh
openaire +3 more sources
Annals of the New York Academy of Sciences, EarlyView.We apply whole‐brain models of brain hierarchy based on a thermodynamics of mind framework to investigate state transitions in depression. Dynamic sensitivity analysis explores how psilocybin and escitalopram affect susceptibility and drivability to healthier states.
Marcel Socoró‐Garrigosa +7 more
wiley +1 more source
Turing–Hopf bifurcation of a ratio-dependent predator-prey model with diffusion
Advances in Difference Equations, 2019 In this paper, the Turing–Hopf bifurcation of a ratio-dependent predator-prey model with diffusion and Neumann boundary condition is considered. Firstly, we present a kind of double parameters selection method, which can be used to analyze the Turing ...
Qiushuang Shi, Ming Liu, Xiaofeng Xu
doaj +1 more source
Stabilizing unstable periodic orbits in the Lorenz equations using time-delayed feedback control
, 2007 For many years it was believed that an unstable periodic orbit with an odd number of real Floquet multipliers greater than unity cannot be stabilized by the time-delayed feedback control mechanism of Pyragus.
C. Sparrow +6 more
core +1 more source