A new scheme of parameter perturbation is used to suppress the stable spiral waves, which generated in a class of excitable media. An appropriated parameter of the investigated model is modulated by a weak chaotic signal from the emanative Rőssler chaotic system. Therefore, the dynamics of the...

Different sleep stages are associated with distinct dynamical patterns in EEG signals. In this article, we explored the relationship between the sleep architecture and fractal dimension (FD) of sleep EEG. In particular, we applied the FD analysis to the sleep EEG of patients with obstructive...

Adsorption of 4He and para-H2 is predicted to exhibit exotic properties on weak-binding surfaces. For 4He, alternative scenarios include nonwetting, prewetting and a Bose gas monolayer. For H2, a monolayer superfluid phase can be created by a suitable choice of the substrate. Intriguing...

Two methods are performed to manifest chaos in a kicked top model. On the one hand we can see that time evolutions and variances of the dynamical variables in regular and chaotic case are obviously different. So the uncertainty measure is convenient for a system with a time-dependent Hamilton....

The influence of fractal heterogeneity on a spiral wave in an excitable system is numerically studied based on the Barkley model. The heterogeneity is implemented by letting the diffusive coefficient in the heterogeneous area be different from the other area. The results show that fruitful...

Ranking nodes by their spreading ability in complex networks is a fundamental problem which relates to wide applications. Local metric like degree centrality is simple but less effective. Global metrics such as betweenness and closeness centrality perform well in ranking nodes, but are of high...