基于随机森林利用差分拉曼光谱对塑料食品包装瓶的分类研究  

Classification of Plastic Food Packaging Bottles by Differential Raman Spectroscopy Based on Random Forest

作　　者：周贯旭 万婕[2] 姜红 周飞翔 倪婷婷 黄凯 ZHOU Guanxu;WAN Jie;JIANG Hong;ZHOU Feixiang;NI Tingting;HUANG Kai(College of Investigation,People's Public Security University of China,Beijing 100038,China;Guangxi Police College,Nanning 530000,China;Judicial Appraisal Center of Wanzijian Testing Technology Co.,Ltd.,Beijing 100141,China;Shanxi Key Laboratory of Food and Drug Safety Prevention and Control,Taiyuan 030006,China;Nanjing Jianzhi Instrument and Equipment Co.,Ltd.,Nanjing 210049,China)

机构地区：[1]中国人民公安大学侦查学院,北京100038 [2]广西警察学院,南宁530000 [3]万子健检测技术(北京)有限公司司法鉴定中心,北京100141 [4]食品药品安全防范山西省重点实验室,太原030006 [5]南京简智仪器设备有限公司,南京210049

出　　处：《包装工程》2024年第9期164-170,共7页Packaging Engineering

基　　金：食品药品安全防范山西省重点实验室开放课题资助(202204010931006);广西警察学院校级科研重点项目(2021KYA05)。

摘　　要：目的建立一种快速无损的检验塑料食品包装瓶的分析方法,提供一种快速分类模型。方法利用差分拉曼光谱对100个塑料食品包装瓶样品进行检验,根据样品的差分拉曼特征峰可以对样品进行分类,样品可被分成聚对苯二甲酸乙二醇酯和聚丙烯两大类,对其中数目较多的第I类继续根据样品中所含填料的不同进行分类。利用贝叶斯判别、多层感知器和随机森林算法分别构建分类模型对继续分类结果进行分析验证。结果第I类样本可继续被分为4类,贝叶斯判别结合留一交叉验证法分类正确率为71.7%,多层感知器神经网络分类模型的训练集和测试集分类正确率分别为100%和86.2%,随机森林分类模型的训练集和测试集分类正确率分别为100%和96.5%。通过比较发现,差分拉曼光谱与随机森林算法相结合可以对塑料食品包装瓶实现有效的分类。结论该方法简单快速,样品用量少且无损样品,可为塑料食品包装品的物证鉴定提供科学依据。The work aims to establish a fast and non-destructive analysis method for inspecting plastic food packaging bottles and provide a fast classification model.100 plastic food packaging bottle samples were tested by differential Raman spectroscopy.The samples were classified based on their differential Raman characteristic peaks and divided into two categories of polyethylene terephthalate and polypropylene.The Class I samples in a larger number were further classified based on the different fillers contained.The classification model was constructed by Bayesian discriminant analysis,multi-layer perceptron,and random forest algorithm to analyze and verify the continued classification results.The Class I samples were further divided into four categories.The classification accuracy of Bayesian discriminant combined with left one cross validation method was 71.7%,the classification accuracy of the training and testing sets of the multi-layer perceptron neural network classification model was100%and 86.2%,respectively,and the classification accuracy of the random forest classification model0020was 100%and 96.5%.Through comparison,it was found that the combination of differential Raman spectroscopy and random forest algorithm could effectively classify plastic food packaging bottles.This method is simple and fast,requiring a small sample size but not damaging samples,which can provide scientific basis for the identification of physical evidence in plastic food packaging products.

关 键 词：差分拉曼光谱 塑料食品包装瓶 人工神经网络 随机森林算法 

分 类 号：TB484[一般工业技术—包装工程]