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Small-World Connections to Induce Firing Activity and Phase Synchronization in Neural Networks 下载免费PDF全文
We investigate how the firing activity and the subsequent phase synchronization of neural networks with smallworld topological connections depend on the probability p of adding-links. Network elements are described by two-dimensional map neurons (2DMNs) in a quiescent original state. Neurons burst for a given coupling strength when the topological randomness p increases, which is absent in a regular-lattice neural network. The bursting activity becomes frequent and synchronization of neurons emerges as topological randomness further increases. The maximal firing frequency and phase synchronization appear at a particular value of p. However, if the randomness p further increases, the firing frequency decreases and synchronization is apparently destroyed. 相似文献
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This paper studies how phase synchronization in complex networks
depends on random shortcuts, using the piecewise-continuous chaotic
Chua system as the nodes of the networks. It is found that for a
given coupling strength, when the number of random shortcuts is
greater than a threshold the phase synchronization is induced. Phase
synchronization becomes evident and reaches its maximum as the
number of random shortcuts is further increased. These phenomena
imply that random shortcuts can induce and enhance the phase
synchronization in complex Chua systems. Furthermore, the paper
also investigates the effects of the coupling strength and it is
found that stronger coupling makes it easier to obtain the
complete phase synchronization. 相似文献
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This paper studies how random phase (namely,
noise-perturbed phase) effects the dynamical behaviours of
a simple model of power system which operates in a
stable regime far away from chaotic behaviour in the absence of
noise. It finds that when the phase perturbation is weak, chaos is
absent in power systems. With the increase of disturbed intensity
$\sigma$, power systems become unstable and fall into chaos as
$\sigma$ further increases. These phenomena imply that random phase
can induce and enhance chaos in power systems. Furthermore, the
possible mechanism behind the action of random phase is addressed. 相似文献
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