Results 71 to 80 of about 148,119 (340)
The Modelling and Control of a Singular Biological Economic System in a Polluted Environment
Discrete Dynamics in Nature and Society, 2016 A singular biological economic model with harvesting and stage structure is presented. The local stability of equilibriums of the system is investigated when the economic profit parameter is zero, and the conditions of the singularity induced bifurcation
Yi Zhang, Yueming Jie, Xinyou Meng
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Transition from rotating waves to modulated rotating waves on the sphere
, 2005 We study non-resonant and resonant Hopf bifurcation of a rotating wave in SO(3)-equivariant reaction-diffusion systems on a sphere. We obtained reduced differential equations on so(3), the characterization of modulated rotating waves obtained by Hopf ...
Adela N. Comanici +3 more
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Advanced Functional Materials, EarlyView.Dual‐cation site engineering unlocks stable and fast sodium storage in Na4VMn(PO4)3 cathodes. Li+ at Na2 suppresses Jahn‐Teller distortion, while K+ at Na1 expands ion channels, enabling synchronized V/Mn redox and quasi‐single‐phase kinetics. This atomic‐level strategy achieves ultralong cycling stability, high‐rate capability, and full cell viability
Jiaze Sun +8 more
wiley +1 more source
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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Numerical bifurcation and hybrid control of a Gompertz model with time delay
Journal of Hebei University of Science and Technology, 2019 In order to study the stability of species, the biological systems are required to reduce or expand the stable region. For a Gompertz model with time delay, a hybrid control Euler method is proposed in which state feedback and parameter perturbation are ...
Jizhi SONG, Yuanyuan WANG
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The Path Formulation of Bifurcation Theory [PDF]
, 1994 We show how the path formulation of bifurcation theory can be made to work, and that it is (essentially) equivalent to the usual parametrized contact equivalence of Golubitsky and Schaeffer.
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Standing and travelling waves in cylindrical Rayleigh-Benard convection
, 2007 The Boussinesq equations for Rayleigh-Benard convection are simulated for a cylindrical container with an aspect ratio near 1.5. The transition from an axisymmetric stationary flow to time-dependent flows is studied using nonlinear simulations, linear ...
Boronska, Katarzyna +1 more
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Rapid Deep Vat Printing Using Photoclickable Collagen‐Based Bioresins
Advanced Healthcare Materials, EarlyView.Collagen‐based resin formulations based on thiol‐ene photoclick chemistry are demonstrated. These resins enable easy handleability under neutral conditions and further allow facile fabrication of multicellular tissue constructs via tomographic or FLight printing.
Michael Winkelbauer +8 more
wiley +1 more source
Stability and Hopf bifurcation periodic orbits in delay coupled Lotka-Volterra ring system
Open Mathematics, 2019 In this paper, we consider a class of delay coupled Lotka-Volterra ring systems. Based on the symmetric bifurcation theory of delay differential equations and representation theory of standard dihedral groups, properties of phase locked periodic ...
Su Rina, Zhang Chunrui
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Singular bifurcations and regularization theory
Physical Review ESeveral nonlinear and nonequilibrium driven as well as active systems (e.g. microswimmers) show bifurcations from one state to another (for example a transition from a non motile to motile state for microswimmers) when some control parameter reaches a critical value.
Alexander Farutin, Chaouqi Misbah
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