Results 61 to 70 of about 228,096 (272)
Supramolecular Chalcogen‐Bonded Shape Memory Actuators
Angewandte Chemie, Volume 137, Issue 30, July 21, 2025.Supramolecular chalcogen‐bonded liquid crystal elastomers incorporating Se⋯N interactions exhibit distinct shape memory and actuation properties. Stronger Se⋯N ChBs enable programmable one‐way and two‐way SME, while weaker S⋯N ChBs fail to induce actuation.
Hongshuang Guo +5 more
wiley +2 more sources
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
A Synthesized Neural Control System for Bioinspired Robots to Achieve Diverse Locomotion
Advanced Intelligent Systems, EarlyView.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
Degenerate Hopf bifurcation in a Leslie–Gower predator–prey model with predator harvest
Advances in Difference Equations, 2020 In this paper, we investigate the degenerate Hopf bifurcation of a Leslie–Gower predator–prey system with predator harvest. The known work discussed the Hopf bifurcation of this system when the first Lyapunov number does not vanish and gave an example of
Juan Su
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Unfoldings of Singular Hopf Bifurcation [PDF]
SIAM Journal on Applied Dynamical Systems, 2012 Singular Hopf bifurcation occurs in generic families of vector-fields with two slow variables and one fast variable. Normal forms for this bifurcation depend upon several parameters, and the dynamics displayed by the normal forms is intricate. This paper analyzes a normal form for this bifurcation.
John Guckenheimer, Philipp Meerkamp
openaire +3 more sources
On qualitative analysis of an ecological dynamics with time delay
Asian Journal of Control, EarlyView.Abstract In this paper, we study a fractional‐order predator–prey system with time delay, where the dynamics are logistic with prey population commensurate to the carrying capacity. Mainly, by linearizing the system around the equilibrium point, we first analyze the stability and then prove the existence of Hopf bifurcation.
Canan Celik, Kubra Degerli
wiley +1 more source
Discrete Dynamics in Nature and Society, 2006 We consider a simplified bidirectional associated memory (BAM) neural network model with four neurons and multiple time delays. The global existence of periodic solutions bifurcating from Hopf bifurcations is investigated by applying the global Hopf ...
Xiang-Ping Yan, Wan-Tong Li
doaj +2 more sources
Time-delayed feedback control for chaotic systems with coexisting attractors
AIMS MathematicsThis study investigated the Hopf bifurcation of the equilibrium point of chaotic systems with coexisting attractors under the time-delayed feedback control.
Erxi Zhu
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Stability Analysis of a Fractional-Order SEIR-KS Computer Virus-Spreading Model with Two Delays
Journal of Mathematics, 2021 In this paper, the stability and Hopf bifurcation of a fractional-order model of the Susceptible-Exposed-Infected-Kill Signals Recovered (SEIR-KS) computer virus with two delays are studied.
Zhufeng Wang, Xiaoqian Nie, Maoxin Liao
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AIMS Mathematics, 2023 In our paper, a delayed diffusive phytoplankton-zooplankton-fish model with a refuge and Crowley-Martin and Holling II functional responses is established.
Ting Gao, Xinyou Meng
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