摘要
在二维映射神经元模型中,同时施加高、低两种不同频率的刺激信号,以高频信号为调制信号,研究其对系统动力学特性的影响.仿真结果表明,通过调节高频信号的幅值为某一合适值,可以使得神经元膜电位对弱低频信号的线性响应达到最优,产生振动共振现象,从而证实了高频刺激信号能够帮助神经元探测和传导弱低频信号.另外,还研究了模型和信号参数对系统共振特性的影响.
The dynamics of a two-dimensional neural map subjected to two harmonic signals with different frequencies was investigated by numerical simulation. The linear response of neuron membrane potential to the low-frequency signal can achieve optimal by modulating the amplitude of high-frequency signal to an appropriate value,where the phenomenon of vibrational resonance occurs. It is shown that the high-frequency signal can help the weak low-frequency signal detection and information propagation. Furthermore,the influences of parameters of the map and input signals on the resonance dynamics were also studied.
出处
《动力学与控制学报》
2012年第1期92-96,共5页
Journal of Dynamics and Control
基金
国家自然科学基金资助项目(61072012)~~
关键词
神经元
二维映射模型
振动共振
刺激信号
neuron
two-dimensional map
vibrational resonance
input signal
