College of Information Science and Technology, Donghua University, Shanghai 201620, P. R. China.
Int J Neural Syst. 2011 Oct;21(5):415-25. doi: 10.1142/S0129065711002924.
Excitement and synchronization of electrically and chemically coupled Newman-Watts (NW) small-world neuronal networks with a short-term synaptic plasticity described by a modified Oja learning rule are investigated. For each type of neuronal network, the variation properties of synaptic weights are examined first. Then the effects of the learning rate, the coupling strength and the shortcut-adding probability on excitement and synchronization of the neuronal network are studied. It is shown that the synaptic learning suppresses the over-excitement, helps synchronization for the electrically coupled network but impairs synchronization for the chemically coupled one. Both the introduction of shortcuts and the increase of the coupling strength improve synchronization and they are helpful in increasing the excitement for the chemically coupled network, but have little effect on the excitement of the electrically coupled one.
兴奋和同步的电和化学耦合纽曼 - 瓦特 （NW） 小世界神经元网络与短期突触可塑性描述的修改后的 Oja 学习规则进行研究。对于每一种类型的神经元网络，首先检查突触权重的变化特性。然后研究学习率、耦合强度和捷径添加概率对神经元网络兴奋和同步的影响。结果表明，突触学习抑制过度兴奋，有助于电耦合网络的同步，但损害化学耦合网络的同步。引入捷径和增加耦合强度都可以提高同步，对化学耦合网络的兴奋也有帮助，但对电耦合网络的兴奋影响不大。
