用波动模型连续建模生物事件信号,提升精度与效率。
Continuous Temporal Representations of Event-Based Signals via Interference-Based Wave Modeling

- 将事件信号转为复数波场,通过相位调制编码时间结构。
- 在有限窗口内捕捉时空局部性与依赖关系,优于纯实值表示。
- 适合假肢、外骨骼等生物力学系统控制任务,可梯度优化。
事件驱动的生物信号(如表面肌电图,sEMG)具有异步性和高度结构化的激活模式,传统离散或纯实值表示难以建模。本文提出基于干涉波的连续时间建模框架,将事件信号映射到复数潜在波场中,通过潜变量间的相位调制与相互作用编码时间结构。通过对生成波场投影至能量域,模型在有限观测窗口内实现结构化激活模式,捕获时间定位性与关系依赖,无需显式循环或因果状态传播。该方法特别适用于事件驱动的生物信号,连续表示支持高效梯度优化与鲁棒特征提取,专为从sEMG数据学习下游控制任务(如假肢、外骨骼)设计。实验表明,相比纯实值表示,该干涉波模型显著提升表征质量,同时保持实用部署所需的计算效率。
原文摘要 · Abstract (English)
Spatio-temporal signals arising from event-driven biological processes, such as surface electromyography (sEMG), exhibit asynchronous and highly structured activation patterns that are challenging to model using conventional discrete or purely real-valued representations. In this work, we propose a continuous temporal modeling framework based on interference-based wave representations. The approach maps event-like input signals into a complex-valued latent wave field, where temporal structure is encoded through phase modulation and interactions between latent components. By projecting the resulting wave field onto an energy domain, the model induces structured activation patterns that capture both temporal localization and relational dependencies within finite observation windows, without relying on explicit recurrence or causal state propagation. The proposed formulation is particularly suited for event-driven biosignals, where continuous representations enable efficient gradient-based optimization and robust feature extraction. In particular, the method is designed to support learning from sEMG data for downstream control tasks in biomechanical systems, such as prosthetic devices and exoskeletons. Experimental results demonstrate that the proposed interference-based wave model provides improved representation quality compared to purely real-valued representations, while maintaining computational efficiency suitable for practical deployment.
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