期刊
COMMUNICATIONS IN THEORETICAL PHYSICS
卷 57, 期 1, 页码 61-67出版社
IOP PUBLISHING LTD
DOI: 10.1088/0253-6102/57/1/10
关键词
multiple spatial coherence resonance; spiral wave; colored noise; neuronal network
资金
- National Natural Science Foundation of China [11072135, 10772101]
- Fundamental Research Funds for the Central Universities [GK200902025]
Gaussian colored noise induced spatial patterns and spatial coherence resonances in a square lattice neuronal network composed of Morris-Lecar neurons are studied. Each neuron is at resting state near a saddle-node bifurcation on invariant circle, coupled to its nearest neighbors by electronic coupling. Spiral waves with different structures and disordered spatial structures can be alternately induced within a large range of noise intensity. By calculating spatial structure function and signal-to-noise ratio (SNR), it is found that SNR values are higher when the spiral structures are simple and are lower when the spatial patterns are complex or disordered, respectively. SNR manifest multiple local maximal peaks, indicating that the colored noise can induce multiple spatial coherence resonances. The maximal SNR values decrease as the correlation time of the noise increases. These results not only provide an example of multiple resonances, but also show that Gaussian colored noise play constructive roles in neuronal network.
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