用忆阻器实现振荡神经网络的自组织学习,可自动去噪并保持反相记忆。
Self-Organized Learning in Oscillatory Neural Networks with Memristive Signed Couplings

- 通过忆阻器构建带抑制连接的振荡网络,实现自组织学习。
- 仿真验证可有效去除输入噪声,并在任务中保持反相状态。
- 适用于需要持久相位编码记忆的类脑计算场景。
振荡神经网络(ONNs)作为有前途的类脑架构,利用耦合动力系统通过相位关系进行计算和信息表征。其相互作用可设计为支持内在的能量最小化动态,从而实现关联记忆和优化等任务,具备持续学习与推理的潜力。本文提出一种基于忆阻边与抑制耦合的类脑原语,可用于自主学习,并通过电路仿真验证了系统在自联想任务中对噪声输入的去噪能力。尽管数值霍普菲尔德/伊辛模型通常假设带符号权重,但实际类脑实现中的ONNs常因器件与电路限制无法实现负权重。一种可行的抑制性(负)权重实现方案尤为关键:它将振荡网络可访问的吸引子结构扩展至非单纯同步耦合,支持相位编码记忆,使反相约束不仅在训练期间临时强制,还能在释放后自主维持。我们通过电路仿真与理论分析证明,有效的符号权重是反相吸引子自主维持所必需的。
原文摘要 · Abstract (English)
Oscillatory neural networks (ONNs) have emerged as a promising neuromorphic architecture, leveraging coupled dynamical systems to perform computation and represent information through phase relationships. Their interactions can be designed to support intrinsic energy-minimizing dynamics, enabling tasks such as associative memory and optimization, and positioning them as a candidate architecture for continuous learning and inference. We present a neuromorphic primitive implemented using memristive edges with inhibitory couplings as a potential design for autonomous learning, and provide circuit simulation validation that the system is capable of denoising noisy inputs on an auto-associative task. While numerical Hopfield/Ising models routinely assume signed weights, neuromorphic implementations of ONNs often fail to realize negative weights due to device and circuit constraints. A practically implementable route to inhibitory (negative) weights is particularly valuable: it expands the class of attractor structures accessible to oscillator networks beyond purely synchronous couplings, and supports phase-coded memories where anti-phase constraints are not merely transiently enforced during training but can persist autonomously after release. We provide circuit simulations and theoretical analyses demonstrating that signed effective weights are necessary for anti-phase attractors to persist autonomously.
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