Application of Pt/GO/rGO memristor array in reservior computing (RC). (A) Demonstration diagram of memristor array. (B) An image of memristor array under microscope. (C) Schematic of the operation of RC based on Pt/GO/rGO memristors for classifying numbers. (D) Experimental read-current responses of a memristor by several electrical input signals. The amplitude and width of the read pulses are correspondingly 8 V and 500 μs. (E) The evolution of the classification accuracy rates using standard batch gradient descent within 50 epochs.