State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace Engineering, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China.
Hefei General Machinery Research Institute, State Key Laboratory of Compressor Technology, Hefei 230031, People's Republic of China.
Chaos. 2023 Mar;33(3):033136. doi: 10.1063/5.0132072.
Chimera, the coexistence state of synchronization and non-synchronization, widely exists in complex networks. It has a great potentially explanatory power for the unihemispheric sleep of birds and some mammals, in which the synchronizations of the hemispheres of the cerebral cortex are evolving alternately. In this study, a coupled nonlinear oscillator system with a topology of the modular complex network was constructed to simulate the left and right hemispheres of the brain. The results showed that a stable chimera, an alternating chimera, and a breathing chimera were produced when the coupling strength and connection probability of the left and right hemispheres were changed. Further, we studied the effect of noise on rich synchronous patterns and found that the alternating chimera was robust to Gaussian white noise when the strength was not very large. Finally, our study was extended to a complex network with three sub-networks, and an alternating chimera could exist in two or three sub-networks. Our research provides a deeper insight into the mechanism of brain function like unihemispheric sleep.
嵌合体，即同步和非同步共存的状态，广泛存在于复杂网络中。它对鸟类和一些哺乳动物的单半球睡眠具有很强的解释力，在这种睡眠中，大脑皮层的两个半球的同步性在交替演变。在这项研究中，构建了一个具有模块复杂网络拓扑结构的耦合非线性振荡器系统，以模拟大脑的左右半球。结果表明，当改变左右半球的耦合强度和连接概率时，会产生稳定的嵌合体、交替的嵌合体和呼吸的嵌合体。此外，我们研究了噪声对丰富同步模式的影响，发现当强度不是很大时，交替嵌合体对高斯白噪声具有鲁棒性。最后，我们的研究扩展到了具有三个子网的复杂网络，并且在两个或三个子网中存在交替嵌合体。我们的研究为单半球睡眠等大脑功能的机制提供了更深入的了解。
