通过复杂度评估方法,系统分析神经元模型对脉冲神经网络性能的影响。
Impact of Neuron Models on Spiking Neural Networks performance. A Complexity Based Classification Approach
- 用莱普尔-兹夫复杂度量化脉冲序列结构规律性
- 发现神经元模型与学习规则的组合影响分类准确率,尤其在噪声下表现差异大
- 适合研究生物信号处理与神经网络鲁棒性设计的学者参考
本研究探讨神经元模型与学习规则的选择如何影响脉冲神经网络(SNNs)的分类性能,重点应用于生物信号处理。比较了漏电积分-放电(LIF)、元神经元和概率性莱维-巴克斯特(LB)神经元等生物启发模型,结合脉冲时序依赖可塑性(STDP)、tempotron及奖励调制更新等学习规则。创新之处在于将基于复杂度的决策机制引入评估流程,采用莱普尔-兹夫复杂度(LZC)衡量脉冲序列的结构规律性,实现不同SNN配置下的统一、可解释评估。使用具有不同时间依赖性和随机性的合成数据集(如马尔可夫与泊松过程)模拟神经元脉冲行为以验证性能。结果表明,分类准确率取决于神经元模型、网络规模与学习规则的交互作用,且基于LZC的评估揭示了在弱信号或噪声环境下仍具鲁棒性的配置。该工作系统分析了神经元模型选择与网络参数、学习策略的协同关系,并提供了一种一致的复杂度基准用于评估SNN性能。
原文摘要 · Abstract (English)
This study explores how the selection of neuron models and learning rules impacts the classification performance of Spiking Neural Networks (SNNs), with a focus on applications in bio-signal processing. We compare biologically inspired neuron models, including Leaky Integrate-and-Fire (LIF), metaneurons, and probabilistic Levy-Baxter (LB) neurons, across multiple learning rules, including spike-timing-dependent plasticity (STDP), tempotron, and reward-modulated updates. A novel element of this work is the integration of a complexity-based decision mechanism into the evaluation pipeline. Using Lempel-Ziv Complexity (LZC), a measure related to entropy rate, we quantify the structural regularity of spike trains and assess classification outcomes in a consistent and interpretable manner across different SNN configurations. To investigate neural dynamics and assess algorithm performance, we employed synthetic datasets with varying temporal dependencies and stochasticity levels. These included Markov and Poisson processes, well-established models to simulate neuronal spike trains and capture the stochastic firing behavior of biological neurons.Validation of synthetic Poisson and Markov-modeled data reveals clear performance trends: classification accuracy depends on the interaction between neuron model, network size, and learning rule, with the LZC-based evaluation highlighting configurations that remain robust to weak or noisy signals. This work delivers a systematic analysis of how neuron model selection interacts with network parameters and learning strategies, supported by a novel complexity-based evaluation approach that offers a consistent benchmark for SNN performance.
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