Results 81 to 90 of about 33,473 (203)
Flow‐Dependent Inertial Permeability Defines Crossover Between Darcy and Forchheimer Flow Regimes
Geophysical Research Letters, Volume 53, Issue 2, 28 January 2026.Abstract We present mechanistic evidence that the Forchheimer inertial permeability coefficient (β $\beta $) is flow‐dependent in the weak‐to‐intermediate inertia crossover regime, governed by pore‐scale eddy growth‐to‐confinement dynamics. In contrast to classical theory, β $\beta $ attains steady‐state (βs ${\beta }_{s}$) asymptotically in the ...
Kuldeep Singh, Negin Sharifabad
wiley +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
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TVB C++: A Fast and Flexible Back‐End for The Virtual Brain
Advanced Science, Volume 13, Issue 2, 9 January 2026.TVB C++ is a streamlined and fast C++ Back‐End for The Virtual Brain (TVB), designed to make it as flexible as TVB, and FAST. Another pillar is to be fully compatible with TVB so easy bindings can be created from Python. Users can easily configure TVB C++ to execute the same code but with enhanced performance and parallelism.
Ignacio Martín +7 more
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AxiomsThis 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
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Hopf bifurcations for a delayed discrete single population patch model in advective environments
European Journal of Applied MathematicsIn this paper, we consider a delayed discrete single population patch model in advective environments. The individuals are subject to both random and directed movements, and there is a net loss of individuals at the downstream end due to the flow into a ...
Weiwei Liu, Zuolin Shen, Shanshan Chen
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Bifurcation of a Microelectromechanical Nonlinear Coupling System with Delay Feedback
Journal of Applied Mathematics, 2014 The dynamics of a kind of electromechanical coupling deformable micromirror device torsion micromirror with delay are investigated. Based on the distribution of eigenvalues, we prove that a sequence of Hopf bifurcation occurs at the equilibrium as the ...
Yanqiu Li +3 more
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A delayed computer virus model with nonlinear incidence rate
Systems Science & Control Engineering, 2019 An Susceptible-Vaccinated-Exposed-Infectious-Recovered computer virus model with nonlinear incidence rate and two delays is proposed and its Hopf bifurcation is investigated.
Yugui Chu, Wanjun Xia, Zecheng Wang
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Periodic orbits for an autonomous version of the Duffing–Holmes oscillator
Nonlinear AnalysisIn the autonomous Duffing–Holmes oscillator, the existence of periodic orbits was detected numerically. Using the Hopf bifurcation theory, we prove analytically that such periodic orbits exist.
Guangfeng Dong, Jaume Llibre
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Control of dynamic Hopf bifurcations [PDF]
Nonlinearity, 1999 The slow passage through a Hopf bifurcation leads to the delayed appearance of large amplitude oscillations. We construct a smooth scalar feedback control which suppresses the delay and causes the system to follow a stable equilibrium branch. This feature can be used to detect in time the loss of stability of an ageing device.
openaire +4 more sources
Stability and Hopf bifurcation in a symmetric Lotka-Volterra predator-prey system with delays
Electronic Journal of Differential Equations, 2013 This article concerns a symmetrical Lotka-Volterra predator-prey system with delays. By analyzing the associated characteristic equation of the original system at the positive equilibrium and choosing the delay as the bifurcation parameter, the local ...
Jing Xia, Zhixian Yu, Rong Yuan
doaj