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ETLP: Event-based Three-factor Local Plasticity for online learning with neuromorphic hardware

arXiv.org, 2023-01

2023. This work is published under http://arxiv.org/licenses/nonexclusive-distrib/1.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. ;http://arxiv.org/licenses/nonexclusive-distrib/1.0 ;EISSN: 2331-8422 ;DOI: 10.48550/arxiv.2301.08281

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  • Title:
    ETLP: Event-based Three-factor Local Plasticity for online learning with neuromorphic hardware
  • Author: Quintana, Fernando M ; Perez-Peña, Fernando ; Galindo, Pedro L ; Neftci, Emre O ; Chicca, Elisabetta ; Khacef, Lyes
  • Subjects: Adaptation ; Back propagation ; Back propagation networks ; Computer Science - Neural and Evolutionary Computing ; Distance learning ; Embedded systems ; Energy consumption ; Hardware ; Machine learning ; Neural networks ; Neuromorphic computing ; Neurons ; Pattern recognition ; Plastic properties ; Real time ; Spiking ; Topology
  • Is Part Of: arXiv.org, 2023-01
  • Description: Neuromorphic perception with event-based sensors, asynchronous hardware and spiking neurons is showing promising results for real-time and energy-efficient inference in embedded systems. The next promise of brain-inspired computing is to enable adaptation to changes at the edge with online learning. However, the parallel and distributed architectures of neuromorphic hardware based on co-localized compute and memory imposes locality constraints to the on-chip learning rules. We propose in this work the Event-based Three-factor Local Plasticity (ETLP) rule that uses (1) the pre-synaptic spike trace, (2) the post-synaptic membrane voltage and (3) a third factor in the form of projected labels with no error calculation, that also serve as update triggers. We apply ETLP with feedforward and recurrent spiking neural networks on visual and auditory event-based pattern recognition, and compare it to Back-Propagation Through Time (BPTT) and eProp. We show a competitive performance in accuracy with a clear advantage in the computational complexity for ETLP. We also show that when using local plasticity, threshold adaptation in spiking neurons and a recurrent topology are necessary to learn spatio-temporal patterns with a rich temporal structure. Finally, we provide a proof of concept hardware implementation of ETLP on FPGA to highlight the simplicity of its computational primitives and how they can be mapped into neuromorphic hardware for online learning with low-energy consumption and real-time interaction.
  • Publisher: Ithaca: Cornell University Library, arXiv.org
  • Language: English
  • Identifier: EISSN: 2331-8422
    DOI: 10.48550/arxiv.2301.08281
  • Source: World Web Journals
    arXiv.org
    ProQuest Databases
    ROAD: Directory of Open Access Scholarly Resources
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