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Rotating neurons for all-analog implementation of cyclic reservoir computing

Researchers from University of Glasgow & Tsinghua University collaborate on an all-analog implementation of reservoir computing.

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Abstract
“Hardware implementation in resource-efficient reservoir computing is of great interest for neuromorphic engineering. Recently, various devices have been explored to implement hardware-based reservoirs. However, most studies were mainly focused on the reservoir layer, whereas an end-to-end reservoir architecture has yet to be developed. Here, we propose a versatile method for implementing cyclic reservoirs using rotating elements integrated with signal-driven dynamic neurons, whose equivalence to standard cyclic reservoir algorithm is mathematically proven. Simulations show that the rotating neuron reservoir achieves record-low errors in a nonlinear system approximation benchmark. Furthermore, a hardware prototype was developed for near-sensor computing, chaotic time-series prediction and handwriting classification. By integrating a memristor array as a fully-connected output layer, the all-analog reservoir computing system achieves 94.0% accuracy, while simulation shows >1000× lower system-level power than prior works. Therefore, our work demonstrates an elegant rotation-based architecture that explores hardware physics as computational resources for high-performance reservoir computing.”

Find the open access technical paper here.

Liang, X., Zhong, Y., Tang, J. et al. Rotating neurons for all-analog implementation of cyclic reservoir computing. Nat Commun 13, 1549 (2022). https://doi.org/10.1038/s41467-022-29260-1.

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