基于太赫兹时域光谱系统的转基因棉花种子主成分特性分析

Principal Component Analysis for Transgenic Cotton Seeds Based on Terahertz Time Domain Spectroscopy System

运用太赫兹时域光谱技术对8种转基因棉花种子进行了探测研究.测量了转基因棉花种子在0.3~1.5THz频率范围的特征吸收谱,基于光谱分析,对比了8种转基因棉花种子吸收光谱的异同,并采用主成分分析法对其做了定性分析,得到了光谱分析的相关数据.提取了三种主成分因子,前三种主成分的累计方差贡献率达到了71.537%,从主成分得分图中可以明显区分不同类别的转基因棉花种子.太赫兹时域光谱技术能够实现对转基因棉花种子的无损检测,在农业选种、农业安全等领域将有广阔的应用价值.

Terahertz time-domain spectroscopy system was used to measure the characteristic absorption spectra of 8transgenic cotton seeds in the frequency range from 0.3to 1.5THz.Comparing the similarities and differences of THz absorption spectrum of 8kinds of transgenic cotton seeds,which based on spectral analysis,and used principal component analysis to perform qualitative analysis,the relevant data of spectral analysis was obtained.Three principal component factors were extracted in this paper,of which the cumulative percentage variance reached 71.537%.Therefore,different categories of transgenic cotton seeds were clearly distinguished according to principal component analysis score chart.The experimental results indicated that nondestructive testing of transgenic cotton seeds could be achieved by using Terahertz time-domain spectroscopy system technology,which could be widely applied in the fields of agricultural seed selection,agricultural security and so on.