Results 71 to 80 of about 121,229 (179)

Impedance Spectroscopy of Bifurcation Oscillations in S‐Type Self‐Oscillatory Devices

Advanced Physics Research, Volume 5, Issue 7, July 2026.
Impedance spectroscopy (IS) reveals stability regimes and bifurcation dynamics in S‐type self‐oscillatory devices. By linking nonlinear control theory with frequency‐domain measurements, experimental signatures of oscillations, entrainment, and phase locking are directly identified.
Gonzalo Rivera‐Sierra, Roberto Fenollosa, Jenifer Rubio‐Magnieto, Nripan Mathews, Si En Ng, Juan Bisquert   +5 more
wiley   +1 more source

Modeled Long‐Term Effects of Psilocybin on Dynamic Activity and Effective Connectivity of Fronto‐Striatal‐Thalamic Circuits

Human Brain Mapping, Volume 47, Issue 10, July 2026.
We used fMRI data from a trial in psychedelic‐naïve healthy participants to show that psilocybin increases dynamic fronto‐striatal‐thalamic activity 4 weeks after dosing. Computational models revealed that reduced structure–function coupling is consistent with the emergence of increased activity dynamics, as well as increased bottom‐up and reduced top ...
Lorenzo Pasquini, Jakub Vohryzek, Anira Escrichs, Yonatan Sanz Perl, Adrian Ponce‐Alvarez, Sebastian Idesis, Manesh Girn, Leor Roseman, Jennifer M. Mitchell, Adam Gazzaley, Morten Kringelbach, David J. Nutt, Taylor Lyons, Robin L. Carhart‐Harris, Gustavo Deco   +14 more
wiley   +1 more source

A Survey On Hopf bifurcation

, 2013
This paper is a survey on Hopf bifurcation, Hopf bifurcation is very important in many areas. In this paper, we focus on the properties and proofs of Hopf bifurcation.
曾仲麟, Tseng, Chung-Lin
core  

The Hopf bifurcation with bounded noise

, 2012
We study Hopf-Andronov bifurcations in a class of random differential equations (RDEs) with bounded noise. We observe that when an ordinary differential equation that undergoes a Hopf bifurcation is subjected to bounded noise then the bifurcation that ...
Homburg, A.J., Young, T.R., Botts, R.T., Homburg, A.J.; id_orcid   +3 more
core   +1 more source

Permanence and Hopf bifurcation of a delayed eco-epidemic model with Leslie–Gower Holling type III functional response

Systems Science & Control Engineering, 2019
This paper is concerned with a delayed eco-epidemic model with a Leslie–Gower Holling type III functional response. The main results are given in terms of permanence and Hopf bifurcation.
Zi Zhen Zhang, Chun Cao, Soumen Kundu, Ruibin Wei   +3 more
doaj   +1 more source

Multimode Phonon Lasing via Self‐Induced Optical Coherent Pumping

Laser &Photonics Reviews, Volume 20, Issue 13, 8 July 2026.
A silicon optomechanical nanobeam generates self‐sustained phonon lasing in multiple competing mechanical modes via self‐pulsing, an intrinsic optical modulation arising from cavity nonlinearity. This self‐organized mechanism enables robust multi‐frequency operation spanning periodic, quasi‐periodic, and chaotic regimes without external modulation. The
David Alonso Tomás, Carlos Mas Arabí, Carles Milián, Néstor E. Capuj, Alejandro Martínez, Daniel Navarro Urrios   +5 more
wiley   +1 more source

ON THE SUPERCRITICALITY OF THE FIRST HOPF BIFURCATION IN A DELAY BOUNDARY PROBLEM

, 2010
The goal of this paper is to analyze the character of the first Hopf bifurcation (subcritical versus supercritical) that appears in a one-dimensional reaction-diffusion equation with nonlinear boundary conditions of logistic type with delay. We showed in
N. CONSUL, J. M. ARRIETA, ARRIETA, J. M., S. M. OLIVA, CONSUL, N., OLIVA, S. M.   +5 more
core   +1 more source

Hopf Bifurcation Analysis for a Computer Virus Model with Two Delays

Abstract and Applied Analysis, 2013
This paper is concerned with a computer virus model with two delays. Its dynamics are studied in terms of local stability and Hopf bifurcation. Sufficient conditions for local stability of the positive equilibrium and existence of the local Hopf ...
Zizhen Zhang, Huizhong Yang
doaj   +1 more source

Hopf bifurcation control for the main drive delay system of rolling mill

Advances in Difference Equations, 2020
In this work, the Hopf bifurcation of the main drive delay system of rolling mill is controlled and analyzed by designing a nonlinear controller. The time-delay is selected as a bifurcation parameter, and the following conclusions are obtained through ...
Jinbin Wang, Lifeng Ma, Yong Wang
doaj   +1 more source

Equivariant Hopf Bifurcation of a Delayed Reaction–Diffusion Predator-Prey Model with Stage Structures on a Circular Domain

Axioms
This paper mainly studies the equivariant Hopf bifurcation of a delayed reaction–diffusion predator–prey model with stage structures on a two-dimensional circular domain. Firstly, we calculate the existence of steady-state solutions, and then analyze the
Ruitong Gao, Xiaofeng Xu, Ming Liu
doaj   +1 more source