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Multiple asymptotical ω-periodicity of fractional-order delayed neural networks under state-dependent switching
Jingxuan Ci1, Zhenyuan Guo1, Han Long2
1School of Mathematics, Hunan University, Changsha 410082, China.
Abstract:
This paper presents theoretical results on multiple asymptotical ω-periodicity of a state-dependent switching fractional-order neural network with time delays and sigmoidal activation functions. Firstly, by combining the geometrical properties of activation functions with the range of switching threshold, a partition of state space is given. Then, the conditions guaranteeing that the solutions can approach each other infinitely in each positive invariant set are derived. Furthermore, the S-asymptotical ω-periodicity and the convergence of solutions in positive invariant sets are discussed. It is worth noting that the number of attractors increases to 3n from 2n in a neural network without switching. Finally, three numerical examples are given to substantiate the theoretical results.
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