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转移和变异:评估HAR深度学习模型对变量的稳定性
Azhar Ali Khaked1, Nobuyuki Oishi2, Daniel Roggen2
1Department of Electrical and Computer Engineering, Concordia University, Montreal, QC H3G 1M8, Canada.
Sensors (Basel, Switzerland)
|January 25, 2025
概括
对于人类活动识别的深度学习模型在与真实世界的数据变异性作斗争. 分析主体,设备和方向变化显示了显著的性能下降,突出了对更强大的模型的需求.
科学领域:
- 可穿戴式传感器技术的技术.
- 机器学习用于健康监测.
- 生物医学信号处理
背景情况:
- 使用可穿戴惯性测量单元 (IMU) 传感器进行人类活动识别 (HAR) 的深度学习 (DL) 模型为持续的健康监测和早期疾病检测提供了潜力.
- 当前的DL HAR模型往往缺乏稳定性,原因是对有限的实验室控制数据进行训练,无法将其推广到现实世界中.
研究的目的:
- 调查主体,设备,位置和方向变化的影响DL HAR模型的性能.
- 用最大平均差异 (MMD) 来量化由这些变量引起的数据分布转移.
- 为了确定分布转移和DL HAR模型性能之间的关系.
主要方法:
- 利用 HARVAR 和 REALDISP 数据集来隔离和分析变化效应.
- 使用的最大平均差异 (MMD) 来测量数据分布变化.
- 与DL模型性能指标相关联的MMD值.
主要成果:
- 对象,装置,位置和方向的变化显著降低了DL HAR模型的性能.
- 在数据分布转移 (MMD) 和模型性能之间观察到一个反向关系.
- 在REALDISP中研究的多个变量的复合效应表明,在现实世界概括方面存在重大挑战.
结论:
- 现实世界的变化对DL HAR模型的概括提出了重大挑战.
- MMD是评估分配转移和解释HAR数据中的性能退化的一个有价值的指标.
- 开发更强大的DL HAR模型,能够处理现实世界的变化,对于有效的健康监测应用至关重要.
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