化学计量学方法选取对烟草含水率近红外分析准确度的影响  

Influence of stoichiometric method selection on the accuracy of the near infrared analysis of tobacco moisture content

作　　者：俞思名 姚燕[1] 刘颖 刘穗君 潘登 蔡晋辉[1] 朱颖颖[3] YU Siming;YAO Yan;LIU Ying;LIU Huijun;PAN Deng;CAI Jinhui;ZHU Yingying(College of Metrology Measurement and Instrument,China Jiliang University,Hangzhou 310018,China;He nan Tobacco Industry Co.,Ltd.Nanyang Cigarette Factory,Nanyang 473007,China;Ningbo University,Ningbo 315211,China)

机构地区：[1]中国计量大学计量测试与仪器工程学院,浙江杭州310018 [2]河南中烟工业有限责任公司南阳卷烟厂,河南南阳473007 [3]宁波大学,浙江宁波315211

出　　处：《中国计量大学学报》2024年第1期28-34,共7页Journal of China University of Metrology

基　　金：国家自然科学基金项目(No.61673358);河南中烟工业有限责任公司重点项目(No.A202053,RH202005)。

摘　　要：目的:研究不同化学计量学方法对烟草含水率近红外分析准确度的影响。方法:比较不同预处理方法(平滑、一阶、二阶、标准正态变量(SNV)和多元散射校正(MSC)及其组合)以及不同波长筛选方法(基于水分波段、基于波长区间、基于波长点)对预测模型性能的影响。结果:仅对数据进行SNV、MSC、MSC+一阶、MSC+SNV、SNV+一阶预处理的模型能够使不同程度的相对分析误差RPD提高,而其他方法则不同程度下降;在波长筛选方法方面,使用基于波长区间的方法能够获得较好的优化效果,经过变量筛选得到594个波长,为原波长数的27.26%,且能提高0.1336的RPD值。结论:不同的计量学方法会对烟草含水率分析准确度产生影响,对于此次数据,应采用MSC预处理方法及基于波长区间筛选方法对数据进行处理。Aims:This paper aims to study the impact of different chemometric methods on the accuracy of the near-infrared analysis of tobacco moisture content.Methods:The effects of different preprocessing methods(smoothing,first-order,second-order,standard normal variable[SNV],multivariate scattering correction[MSC]and their combinations)as well as different wavelength screening methods(based on moisture bands,wavelength intervals,and wavelength points)on the performance of prediction models were compared.Results:Models that only performed SNV,MSC,MSC+first-order,MSC+SNV,SNV+first-order preprocessing on the data could achieve varying degrees of RPD improvement while other methods decreased to varying degrees.In terms of wavelength screening methods,using wavelength interval-based methods could achieve good optimization results.After variable screening,594 wavelengths were obtained,which was 27.26%of the original number of wavelengths,and could improve the RPD value by 0.1336.Conclusions:Different econometric methods will affect the accuracy of tobacco moisture content analysis.For this data,the MSC preprocessing method and the wavelength interval screening method should be used to process the data.

关 键 词：预处理 水分波段 无信息变量消除法 竞争性自适应重加权采样法 

分 类 号：TP23[自动化与计算机技术—检测技术与自动化装置]