对于可穿戴式传感器的母波段功能选择的定量分析基于人为活动识别的传感器
Heba Nematallah1, Sreeraman Rajan1
1Department of Systems and Computer Engineering, Carleton University, Ottawa, ON K1S 5B6, Canada.
Sensors (Basel, Switzerland)
|April 13, 2024
概括
选择正确的母波段对于使用可穿戴传感器准确识别人类活动 (HAR) 至关重要. 这项研究提出了一种最佳的波段选择方法,以提高HAR性能,以最小的计算需求.
科学领域:
- * * 信号处理 信号处理
- * 机器学习 * 机器学习
- * 可穿戴技术 * 可穿戴技术
背景情况:
- *物联网 (IoT) 可穿戴设备的进步,特别是惯性传感器,需要精确的人类活动识别 (HAR).
- *波段转换因其时间频率定位而适合HAR,但最佳的母波段选择对性能至关重要.
- *活动信号呈现出明显的周期性模式,使母波形状与传感器数据相匹配对于识别准确性至关重要.
研究的目的:
- * 为人类活动识别 (HAR) 提出和评估一个最佳的母波束选择方法.
- * 通过波段包转换和基于的标准,研究母波段选择对HAR性能的影响.
- * 为在使用可穿戴惯性传感器的HAR系统中选择最佳母波段提供指导方针.
主要方法:
- * 实施了最佳母波段选择方法,将波段数据包转换与能量与香农比率结合起来.
- * 使用决策树 (DT) 和支持向量机 (SVM) 作为分类算法.
- * 在八个公共ADL数据集 (MHEALTH, WISDM, HARTH, HARsense, DaLiAc, PAMAP2, REALDISP, HAR70+) 中评估了六个母波束家族.
主要成果:
- * 拟议的方法证明了母波段选择对HAR性能的显著影响.
- * 根据信号形状相似性和能量比率进行最佳波段选择,提高了识别准确性.
- *分析证实了跨不同数据集的综合方法的有效性.
结论:
- *最佳的母波段选择是提高可穿戴传感器系统HAR精度的关键因素.
- *能量与香农率的比率有效地指导了与活动信号特征相匹配的波的选择.
- * 这项研究为优化HAR应用中的母波段选择提供了有价值的框架.
相关概念视频
Difference from Background: Limit of Detection
9.0K
The limit of detection (LOD) is the smallest amount of analyte that can be distinguished from the background noise. The LOD value corresponds to the concentration at which the analyte signal is three times larger than the standard deviation of the blank signal. Below this value, the analyte signal cannot be differentiated from the background noise. It is calculated by dividing the calibration slope by 3 times the standard deviation of the blank signals.
The LOD indicates the presence or absence...
The LOD indicates the presence or absence...
9.0K
High-Performance Liquid Chromatography: Types of Detectors
2.3K
The role of the detectors in High-Performance Liquid Chromatography (HPLC) is to analyze the solutes as they exit from the chromatographic column. The detector recognizes the solute's property and generates corresponding electrical signals, which are converted into a readable graph of the detector's response versus elution time called a chromatogram at the computer. There are several types of HPLC detectors, each with its own advantages and limitations, depending on the analyte...
2.3K


