Hopf bifurcation control of the M–L neuron model with type I

Hopf bifurcation control of the M–L neuron model with type I
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I型M-L神经元模型的Hopf分岔控制

DOI:
10.1007/s11071-016-3073-x
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发表时间:
2017
期刊:
影响因子:
5.6
通讯作者:
Shihua Chen
Shihua Chen
中科院分区:
工程技术2区
文献类型:
--
作者:
Huang Chunli;Wen Sun;Zhigang Zheng;Jinhu Lu;Shihua Chen

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许多神经系统疾病是由神经系统的一个或多个调节参数的值变化引起的分叉引起的。分叉控制在这些动力学疾病的诊断和治疗中具有潜在的应用价值。本文采用由线性项和非线性三次项组成的冲刷滤波辅助动态反馈控制器来控制第一类Morris-LeCar(M-L)神经元模型中Hopf分叉的发生。结果表明,线性项决定了Hopf分叉的位置,而非线性三次项调节了Hopf分叉的临界性,从而防止了它在一定的外加电流范围内发生。进一步系统地分析了外加电流、线性控制增益和滤波时间常数倒数之间的关系,有助于从可行的参数空间中进行最佳选择,以实现我们的控制任务。仿真结果表明了所提方法的有效性。
Many neurological diseases are known to be caused by bifurcations induced by a change in the values of one or more regulating parameter of nervous systems. The bifurcation control may have potential applications in the diagnosis and therapy of these dynamical diseases. In this paper, a washout filter-aided dynamic feedback controller composed of the linear term and the nonlinear cubic term is employed to control the onset of Hopf bifurcation in the Morris–Lecar (M–L) neuron model with type I. It is shown that the linear term determines the location of the Hopf bifurcation, while the nonlinear cubic term regulates the criticality of the Hopf bifurcation, preventing it from occurring in a certain range of the externally applied current. The relationships among the externally applied current, the linear control gain and the reciprocal of the filter time constant are further systematically analyzed, which help to make the best choice from the feasible parameter space to achieve our control task. Simulation results are provided to illustrate the effectiveness of the proposed methods.
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