杀菌剂类农药的太赫兹光谱分类方法  

Terahertz spectroscopy cluster analysis of four kinds of bactericide

作　　者：马冶浩[1] 王强[1] 王孝伟[1] 谷小红[1] 

机构地区：[1]中国计量学院质量与安全工程学院,浙江杭州310018

出　　处：《湖南科技大学学报（自然科学版）》2012年第1期107-111,共5页Journal of Hunan University of Science And Technology：Natural Science Edition

基　　金：国家公益性质检科研专项资助项目(200910181);国家自然科学基金资助项目(60902095)

摘　　要：提出一种新的针对杀菌剂类农药太赫兹光谱的分类方法,即用小波包变换来对杀菌剂太赫兹光谱进行特征提取,然后用欧式距离法对4种农药进行分类.太赫兹时域光谱(THz-TDS)技术是一种由超快激光技术快速发展起来的无损检测技术,利用太赫兹时域光谱系统对4种杀菌剂,即福美铁、多菌灵、克菌丹、噻菌灵进行了检测,得到了4种药品的太赫兹时域光谱.用小波包对农药时域光谱进行分解,计算小波包能量谱,并把能量谱作为聚类分析的特征向量,用欧式距离法对杀菌剂太赫兹光谱进行分类,实验结果表明,该方法可以有效地对杀菌剂进行分类.A new cluster analysis method for bactericide spectrum was put forward on which wavelet packet and Euclidean distance were applied.The terahertz time-domain spectroscopy（THz-TDS） was a newly developing spectroscopy technique base on ultrafast laser technology.Four kinds of bactericide（ferric dimethyldithiocarbamate,carbendazim,captan,thiabendazole） were measured by THz-TDS to obtain their terahertz spectrums.Then the terahertz time-domain spectrums of samples were decomposed by wavelet packet transform.The wavelet packet energy spectrum were calculated,which were considered as feature vectors for cluster analysis.The experimental result shows that this method is able to successfully classify the bactericides terahertz spectrum based on wavelet packet and Euclidean distance.

关 键 词：太赫兹时域光谱 超快激光技术 小波包变换 欧式距离法 

分 类 号：O433.4[机械工程—光学工程]