列德的多项式基于拟合的变换提供了对疲劳对表面电肌图 (sEMG) 信号复杂性的影响的新见解
Meryem Jabloun1, Olivier Buttelli1, Philippe Ravier1
1Laboratoire Pluridisciplinaire de Recherche en Ingénierie des Systèmes, Mécanique, Énergétique (PRISME), University of Orleans, 45100 Orleans, France.
Entropy (Basel, Switzerland)
|October 25, 2024
概括
局部莱根德尔多项式基于匹配的变量 (LPPE) 量化了时间序列的复杂性. 这项研究表明,LPPE可以在表面肌电图 (sEMG) 信号中评估肌肉疲劳,更高的维度可以改善疲劳歧视.
科学领域:
- 生物医学工程 生物医学工程
- 信号处理 信号处理
- 复杂性科学 复杂性科学
背景情况:
- 时间序列分析经常使用复杂度指标来理解系统动态.
- 随机变量及其变体是量化时间序列随机性的既定方法.
- 从表面电肌图 (sEMG) 信号评估肌肉疲劳在体育科学和康复中至关重要.
研究的目的:
- 在评估肌肉疲劳时,研究局部莱根德尔多项式基于合适的变量 (LPPE) 的有效性.
- 探索LPPE不同嵌入尺寸如何影响其在sEMG信号中检测疲劳的能力.
- 为了比较LPPE的性能与现有的多尺度互换 (MPE) 变体.
主要方法:
- 介绍LPPE,一种基于顺序模式和莱根德多项式的新型复杂度度.
- 在70%的MVC时,在疲劳的双腕缩期间获取真实sEMG数据.
- 用不同的嵌入尺寸的LPPE应用于分段的sEMG数据,代表不同的疲劳阶段.
- 将LPPE结果与精制复合下采样 (rcDPE) 的结果进行比较,这是一种MPE变体.
主要成果:
- 随着疲劳水平的增加,LPPE值显示出显著的变化,随着嵌入尺寸的变化而变化.
- 较低的LPPE嵌入尺寸与文献一致,表明疲劳期间sEMG复杂性降低.
- 更高的嵌入尺寸提高了LPPE对疲劳特征的低频组件的灵敏度,改善了歧视.
结论:
- LPPE显示出作为一个有价值的工具来量化sEMG肌肉疲劳的潜力.
- 由于LPPE能够在实践中探索更高的嵌入维度,因此比其他MPE方法具有独特的优势.
- LPPE提供了一个对疲劳诱导的sEMG信号复杂性变化的补充视角.
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