Waveform Classification by Two-Layer Reservoir Computing with van der Pol Oscillators

In this research, one van der Pol oscillator is considered as one node, and the oscillators are interconnected using resistors to form a reservoir layer. A networked reservoir computing model which has two layers is proposed (two-layer reservoir). A waveform classification is performed, and the accuracy is compared with a single-layer reservoir. The results show that changing the nature of the oscillator for each layer improves the classification accuracy. This result suggests that using the two-layer reservoir increases design flexibility and improves accuracy.