Discrimination of the geographical origin of Codonopsis pilosula using near infrared diffuse reflection spectroscopy coupled with random forests and k-nearest neighbor methods

doi:10.1016/j.vibspec.2012.05.001

CORC > 兰州大学 > 兰州大学 > 第一临床医学院 > 期刊论文

	Discrimination of the geographical origin of Codonopsis pilosula using near infrared diffuse reflection spectroscopy coupled with random forests and k-nearest neighbor methods
	Li, BX; Wei, YH; Duan, HG; Xi, LL; Wu, XN; Wu, XN (reprint author), Lanzhou Univ, Dept Pharm, Hosp 1, Lanzhou 730000, Peoples R China.
刊名	VIBRATIONAL SPECTROSCOPY
	2012-09
卷号	62 页码:17-22
关键词	Codonopsis pilosula Near infrared spectroscopy Random forests Variable selection k-Nearest neighbor
ISSN号	0924-2031
DOI	10.1016/j.vibspec.2012.05.001
文献子类	Article
英文摘要	The combination of near infrared (NIR) spectroscopy with chemometrics provides an approach to study Codonopsis pilosula according to its geographical origin. Firstly, principle component analysis (PCA) was used to group samples based on their spectral differences. Random forests (RF) and k-nearest neighbor (KNN) were applied to build the classification models and predict the geographical origins of test samples. Raw and SNV first derivative NIR spectra were compared to develop a robust classification rule. Feature selection by RF using the variable importance returned 4 selected features, and the selected effective wavenumbers were put into KNN to establish the classification model. For independent test set, same total accuracy rate 94% could be achieved using RF and KNN. These results showed that NIR combined with chemometrics might be a suitable method that can be easily implemented to classify C. pilosula. (C) 2012 Elsevier B.V. All rights reserved.
学科主题	Chemistry ; Spectroscopy
出版地	AMSTERDAM
项目编号	Chinese Traditional Medicine Bureau of Gansu [GZK-2008-30]
语种	英语
WOS记录号	WOS:000308855000004
内容类型	期刊论文
源URL	[http://ir.lzu.edu.cn/handle/262010/125761]
专题	第一临床医学院_期刊论文
通讯作者	Wu, XN (reprint author), Lanzhou Univ, Dept Pharm, Hosp 1, Lanzhou 730000, Peoples R China.
推荐引用方式 GB/T 7714	Li, BX,Wei, YH,Duan, HG,et al. Discrimination of the geographical origin of Codonopsis pilosula using near infrared diffuse reflection spectroscopy coupled with random forests and k-nearest neighbor methods[J]. VIBRATIONAL SPECTROSCOPY,2012,62:17-22.
APA	Li, BX,Wei, YH,Duan, HG,Xi, LL,Wu, XN,&Wu, XN .(2012).Discrimination of the geographical origin of Codonopsis pilosula using near infrared diffuse reflection spectroscopy coupled with random forests and k-nearest neighbor methods.VIBRATIONAL SPECTROSCOPY,62,17-22.
MLA	Li, BX,et al."Discrimination of the geographical origin of Codonopsis pilosula using near infrared diffuse reflection spectroscopy coupled with random forests and k-nearest neighbor methods".VIBRATIONAL SPECTROSCOPY 62(2012):17-22.