Results 71 to 80 of about 203,161 (272)
Dynamics of an SIR epidemic model incorporating time delay and convex incidence rate
Results in Physics, 2022 In this paper, dynamical behaviors including stability and Hopf bifurcation of a delayed SIR epidemic model with convex incidence rate are examined. We first discuss the existence of Hopf bifurcation.
Haojie Yang +4 more
doaj +1 more source
Stability of singular Hopf bifurcations
Journal of Differential Equations, 2004 Consider the singularly perturbed system \[ \frac{dx}{dt}=\varepsilon f(x,y,\lambda),\quad\frac{dy}{dt}= g(x,y,\lambda)\tag{*} \] with \(x\in\mathbb{R}^n\), \(y\in\mathbb{R}^m\), \(\varepsilon,\lambda\in\mathbb{R}\), \(\varepsilon\) small. It is assumed that there exists a curve \(\lambda=\lambda(\varepsilon)\) in the parameter plane associated with ...
Yang Lijun, Zeng Xianwu
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Kaldor, Hicks and Goodwin Meet the Supermultiplier: On Growth Cycles and Autonomous Demand
Metroeconomica, Volume 76, Issue 4, Page 545-556, November 2025.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
Zhejiang Daxue xuebao. Lixue ban, 2016 This paper is devoted to Hopf bifurcation of a delayed SVEIR model with partial immunization that describes worms propagation on internet. Sufficient conditions for existence of Hopf bifurcation are obtained by considering the latent period time delay of
ZHANGZizhen(张子振) +2 more
doaj +1 more source
Spatiotemporal attractors generated by the Turing-Hopf bifurcation in a time-delayed reaction-diffusion system [PDF]
Discrete & Continuous Dynamical Systems - B, 2017 We study the Turing-Hopf bifurcation and give a simple and explicit calculation formula of the normal forms for a general two-components system of reaction-diffusion equation with time delays. We declare that our formula can be automated by Matlab.
Qi An, Weihua Jiang
semanticscholar +1 more source
The Hopf bifurcation for nonlinear semigroups [PDF]
Bulletin of the American Mathematical Society, 1973 Several authors, have shown by perturbation techniques that the Hopf theorem on the development of periodic stable solutions is valid for the Navier-Stokes equations; in particular, solutions near the stable periodic ones remain defined and smooth for all t ≥ 0 . The principal difficulty is that the Hopf theorem deals with flows of smooth vector fields
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Hopf and zero-Hopf bifurcations in the Hindmarsh–Rose system [PDF]
Nonlinear Dynamics, 2015 Agraïments: The first author is partially supported by FAPESP Grant 2013/2454-1, CAPES Grant 88881.068462/2014-01 and EU Marie-Curie IRSES Brazilian-European partnership in Dyn. Systems (FP7-PEOPLE-2012-IRSES 318999 BREUDS). Agraïments: The second author is partially supported CAPES Grant Number 88881.
Claudio Buzzi +2 more
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A Synthesized Neural Control System for Bioinspired Robots to Achieve Diverse Locomotion
Advanced Intelligent Systems, Volume 7, Issue 10, October 2025.A novel hexapod robot named RENS H2 based on the synthesized neural control system. The control system is constructed based on the central pattern generator and virtual motoneurons network, serving as the foundation of the behavioral network. It encompasses omnidirectional movement, regulation of motor neuron intensity, sensorimotor integration, local ...
Chunchao Liu, Yaguang Zhu, Zhigang Han
wiley +1 more source
On degenerate planar Hopf bifurcations [PDF]
Journal of Physics A: Mathematical and Theoretical, 2011 Our concern is the study of degenerate Hopf bifurcation of smooth planar dynamical systems near isolated singular points. To do so, we propose to split up the definition of degeneracy into two types. Degeneracy of first kind shall means that no limit cycle surrounding the steady state can emerge after or before the critical point, with the possible ...
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Engineering Reports, Volume 7, Issue 10, October 2025.This work presents a secure telemedicine cryptosystem based on a novel 4D memristive chaotic oscillator and a Dispatched Gray Code Scrambler (DGCS). Implemented on FPGA, the system ensures power‐efficient encryption, making it suitable for real‐time medical image transmission in IoT healthcare environments.
Fritz Nguemo Kemdoum +3 more
wiley +1 more source