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NEC Corporation

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Selected work

Representative Papers

Scalable Training of Continuous-Time Spiking Neural Networks with Differentiable Spike-Time Discretization

Jul 16, 2026

This work addresses the prohibitive memory overhead of deep continuous-time spiking neural networks (SNNs), which arises from the precise tracking of spike timings and hinders scalability. To overcome this limitation, the authors propose a Differentiable Spike Time Discretization (DSTD) framework that maps irregular presynaptic spikes onto fixed time steps as differentiable weighted events, accurately approximating continuous membrane potential dynamics while drastically reducing memory consumption. By integrating the leaky integrate-and-fire (LIF) neuron model, time-to-first-spike (TTFS) encoding, and a temporal regularization mechanism inspired by synchronous firing chains, the approach effectively mitigates neuronal death and enables pipeline-like training. Experiments demonstrate successful training of a 9-layer CIFAR-10 and a 20-layer Fashion-MNIST convolutional SNN on a single GPU, achieving approximately 100× lower peak memory usage and 20× faster training speed.

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Latest Papers

Scalable Training of Continuous-Time Spiking Neural Networks with Differentiable Spike-Time Discretization

Jul 16, 2026

This work addresses the prohibitive memory overhead of deep continuous-time spiking neural networks (SNNs), which arises from the precise tracking of spike timings and hinders scalability. To overcome this limitation, the authors propose a Differentiable Spike Time Discretization (DSTD) framework that maps irregular presynaptic spikes onto fixed time steps as differentiable weighted events, accurately approximating continuous membrane potential dynamics while drastically reducing memory consumption. By integrating the leaky integrate-and-fire (LIF) neuron model, time-to-first-spike (TTFS) encoding, and a temporal regularization mechanism inspired by synchronous firing chains, the approach effectively mitigates neuronal death and enables pipeline-like training. Experiments demonstrate successful training of a 9-layer CIFAR-10 and a 20-layer Fashion-MNIST convolutional SNN on a single GPU, achieving approximately 100× lower peak memory usage and 20× faster training speed.

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