桌面 volatilomics 和先进的卷积神经网络工作流程,用于准确和可解释的食品认证
Farbod Bayat-Afshary1, Nima Naderi Tehrani1, Lukas Bodenbender2
1Department of Chemistry, Sharif University of Technology, P.O. Box 11155-9516, Tehran, Iran.
Food chemistry
|December 13, 2025
概括
这项研究引入了一种深度学习工作流程,用于使用气色谱-离子移动光谱法 (GC-IMS) 分析挥发性有机化合物 (VOC). 该方法提高了分类准确性,并为复杂的化学数据提供了可解释的结果.
科学领域:
- 分析化学 分析化学
- 计算化学计算化学
- 频谱学是一种光谱学.
背景情况:
- 气色谱-离子流动性光谱法 (GC-IMS) 是一种敏感的技术,用于挥发性有机化合物 (VOC) 分析.
- 由于GC-IMS数据具有二次性质,因此在峰值对齐,特征提取和分类方面存在挑战.
- 现有的方法难以应对GC-IMS数据的复杂性,限制了其实际应用.
研究的目的:
- 为GC-IMS数据分析开发一个强大且可解释的深度学习 (DL) 框架.
- 使用卷积神经网络 (CNN) 提高GC-IMS数据的分类准确性.
- 为了解决数据的局限性,并提高GC-IMS分析的解释性.
主要方法:
- 开发了一个使用卷积神经网络 (CNN) 的深度学习工作流程,将GC-IMS染色图处理为图像.
- 两个CNN架构 (简化和复杂) 在橄油和类数据集上进行了评估.
- 引入了一种新的GC-IMS特定的数据增强技术来模拟仪器漂移.
- 度图和主要成分分析 (PCA) 用于数据解释性.
主要成果:
- 简化的CNN模型实现了高分类准确度,为橄油的96.4%,类数据集的98.3%.
- 开发的数据增强方法有效地解决了有限的样本大小所带来的挑战.
- 可解释性方法揭示了每个类别的稳定,集体的VOC签名,超越了单个样本的解释.
结论:
- 拟议的DL框架为GC-IMS数据分析提供了一种强大且易于解释的方法.
- 将DL预测与化学测量解释性结合起来,可以提高VOC分析的稳定性.
- 这种工作流便于实践实验室部署复杂的GC-IMS数据集.
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