具有多时相链的工作记忆

arXiv:2604.14096v3 Announce Type: replace Abstract: Working memory --- the ability to store and recall precise temporal patterns of activity --- remains an open challenge for spiking neural networks (SNNs). A recurrent SNN of $N=1024$ neurons is proposed, in which each synapse is equipped with $D = 41$ heterogeneous delays, parameterised as a weight tensor $\mathbf{W} \in \mathbb{R}^{N \times N \times D}$ and trained end-to-end with surrogate-gradient backpropagation through time. Each stored motif is represented as a sequential chain of overlapping Spiking Motifs: contiguous context windows of length $D$ that uniquely predict the activity at the next time step. A closed-form Hebbian initialisation, derived by deconvolving the LIF membrane response and targeting a membrane potential value above the firing threshold $\vartheta$, already achieves high $F_1$ scores before any gradient step on a benchmark of $M=16$ motifs of duration $T=1000$ steps. With learning, the network reaches a mean $F_1$ score of $0.80$ over the motifs, and retrieval degrades gracefully when the trigger window is corrupted, with an $F_1$ score of $0.53$ at $25\%$ bit-flip noise. The network shows attractor-like retrieval dynamics consistent with hippocampal motif completion and with low-dimensional collective dynamics of population activity on manifolds. These results demonstrate that heterogeneous synaptic delays are an efficient and scalable substrate for working memory in SNNs, with direct implications for neuromorphic edge deployment.

中文翻译还没有生成，先显示原文。