KAN模型在时间序列分类中表现优异且可解释,优于传统神经网络。
Exploring Kolmogorov-Arnold Networks for Interpretable Time Series Classification
- 用可解释的KAN替代传统深度网络,提升模型透明度。
- 在117个数据集上,KAN比MLP更快更准,且稳定性更强。
- 适合追求高性能与可解释性平衡的研究者和工业应用。
时间序列分类在多个领域支撑决策,深度神经网络虽表现优异,但其工作机制仍不清晰,亟需更可解释的模型。近期提出的柯尔莫哥洛夫-阿诺德网络(KAN)提供了更具可解释性的替代方案。尽管相关研究快速增长,但面向时间序列分类的KAN研究仍有限。本文基于UCR基准数据集中的117个数据集,系统探索了KAN架构在时间序列分类中的应用:评估了为回归设计的参考架构在分类任务中的迁移能力;识别出在117个数据集上泛化性能最佳的超参数与实现配置;分析了复杂度权衡;并评估了KAN的可解释性。结果表明:(1) Efficient KAN在性能与训练速度上均优于MLP,适用于分类任务;(2) 在不同网格大小、深度和层配置下,Efficient KAN比原始KAN更稳定,尤其在低学习率下表现突出;(3) KAN在准确率上媲美HIVE-COTE2和InceptionTime等先进模型,同时拥有更小的模型规模和更快的训练速度,展现出性能与透明性的良好平衡;(4) 通过SHAP分析验证,KAN具备良好的可解释性,支持透明决策。
原文摘要 · Abstract (English)
Time series classification is a relevant step supporting decision-making processes in various domains, and deep neural models have shown promising performance in this respect. Despite significant advancements in deep learning, the theoretical understanding of how and why complex architectures function remains limited, prompting the need for more interpretable models. Recently, the Kolmogorov-Arnold Networks (KANs) have been proposed as a more interpretable alternative to deep learning. While KAN-related research is significantly rising, to date, the study of KAN architectures for time series classification has been limited. In this paper, we aim to conduct a comprehensive and robust exploration of the KAN architecture for time series classification utilising 117 datasets from UCR benchmark archive, from multiple different domains. More specifically, we investigate a) the transferability of reference architectures designed for regression to classification tasks, b) identifying the hyperparameter and implementation configurations for an architecture that best generalizes across 117 datasets, c) the associated complexity trade-offs and d) evaluate KANs interpretability. Our results demonstrate that (1) the Efficient KAN outperforms MLPs in both performance and training times, showcasing its suitability for classification tasks. (2) Efficient KAN exhibits greater stability than the original KAN across grid sizes, depths, and layer configurations, especially when lower learning rates are employed. (3) KAN achieves competitive accuracy compared to state-of-the-art models such as HIVE-COTE2 and InceptionTime, while maintaining smaller architectures and faster training times, highlighting its favorable balance of performance and transparency. (4) The interpretability of the KAN model, as confirmed by SHAP analysis, reinforces its capacity for transparent decision-making.
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