对于环境VOC OH反应性的PID传感器的短期机器学习校准
Han Yang1,2,3, Wei Song1,2, Xiaoyang Wang1,2
1State Key Laboratory of Advanced Environmental Technology, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China.
机器学习快速校准光离子探测器 (PID) 传感器,以准确监测挥发性有机化合物 (VOC). 这种方法提高了环境测量的传感器可靠性.
科学领域:
- 环境科学 环境科学
- 分析化学 分析化学
- 传感器技术 传感器技术
背景情况:
- 光电离子探测器 (PID) 传感器对于监测挥发性有机化合物 (VOC) 是具有成本效益的.
- PID传感器的准确性受到环境因素 (温度,湿度) 和传感器变化的限制.
- 量化VOC监测需要可靠的校准方法.
研究的目的:
- 开发用于PID传感器的快速机器学习 (ML) 校准工作流.
- 为了将PID信号和气象数据映射到VOC OH反应率 (R_OH,PTR).
- 提高PID传感器网络的定量可靠性和一致性.
主要方法:
- 四个MiniPID传感器与PTR-ToF-MS和热湿度计的同位.
- 数据协调到10秒分辨率.
- 评估多重回归模型,专注于集体方法 (RF,XGBoost) 与时间意识的验证.
主要成果:
- XGBoost组合模型与PTR衍生的VOC OH反应性 (皮尔森的r = 0.85,R^2 = 0.64) 有着强烈的一致性.
- ML方法显著改善了传感器间的一致性.
- 一个短期的校准策略被使用超时评估验证.
结论:
- 快速ML校准有效地纠正PID传感器漂移和环境影响.
- 工作流程使PID网络的实用,基于同位点的协调成为可能.
- 这种方法支持在各种环境中高时间分辨率的VOC反应性监测.
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