摘要
将近红外漫反射光谱技术与CARS-PLS相结合,建立一种规模化奶牛场粪污治理过程中全环节粪便中总氮含量的快速检测方法。采集111个粪污治理全过程环节粪便样品的近红外漫反射光谱,利用间隔偏最小二乘法(iPLS)、联合偏最小二乘法(siPLS)和竞争自适应重加权抽样法(CARS)进行建模变量选择。全波长建模的相关系数(R)为0.928,预测均方根误差(RMSEP)为0.1613%;iPLS变量选择后的相关系数为0.926,RMSEP为0.1514%;siPLS变量选择后的相关系数为0.928,RMSEP为0.1491%;CARS变量选择后的相关系数为0.981,RMSEP为0.0841%。上述结果表明:通过变量选择可以良好地提升模型的预测精度,而3种变量选择方法中通过CARS法进行建模变量的选择可以更大地降低预测误差,提高预测精度。该研究为开发现场便捷式近红外光谱仪器提供了理论基础。
A rapid method for the determination of total nitrogen in feces of large-scale dairy farms was established combining near infrared diffuse reflectance spectroscopy with CARS-PLS.Near infrared diffuse reflectance spectra of 111 feces samples were collected from the whole process of wastewater treatment.Modeling variables were selected by using interval partial least squares(iPLS),synergy intervalpartial least squares(siPLS)and competitive adaptive weighted sampling(CARS).For full-wavelength modeling,the correlation coefficient(R)and root mean square error of prediction(RMSEP)were 0.928 and 0.1613%,respectively.For iPLS modeling,the R and RMSEP were 0.926 and 0.1514%,respectively.For siPLS modeling,the R and RMSEP were 0.928 and 0.1491%,respectively.For CARS model,the R and RMSEP were 0.981 and 0.0841%,respectively.The results showed that the prediction accuracy of the model couldbe improved by variable selection,and the prediction error could be reduced and the prediction accuracy could be improved by using CARS method.This study provides a theoretical basis for the development of field convenient near infrared spectrometer.
作者
王鹏
赵润
孟祥辉
付学周
辛悦
宁天阳
赵文雅
杨仁杰
WANG Peng;ZHAO Run;MENG Xiang-hui;FU Xue-zhou;XIN Yue;NING Tian-yang;ZHAO Wen-ya;YANG Ren-jie(College of Engineering and Technology,Tianjin Agricultural University,Tianjin 300384,China;Agro-Environmental Protection Institute,Ministry of Agriculture and Rural Affairs,Tianjin 300191,China)
出处
《天津农学院学报》
CAS
2020年第1期82-86,共5页
Journal of Tianjin Agricultural University
基金
国家重点研发计划(2018YFD0800100)
天津市现代奶牛产业技术体系创新团队建设专项(ITTCRS2017006)
国家自然科学基金(41771357,21607114,81471698)
天津市自然科学基金(18JCYBJC96400,16JCQNJC08200)。
关键词
近红外漫反射光谱
奶牛粪便
总氮
偏最小二乘
iPLS
siPLS
CARS
near infrared reflectance spectroscopy
dairy cow manure
total nitrogen(TN)
partial least squares
interval partial least square
synergy interval partial least square
CARS