光谱学与光谱分析, 2018, 38 (3): 665, 网络出版: 2018-04-09
基于太赫兹光谱的植物生长调节剂检测技术研究
Study of Plant Growth Regulators Detection Technology Based on Terahertz Spectroscopy
太赫兹光谱 植物生长调节剂 吸收系数 最小二乘支持向量机 多类分类 Terahertz spectroscopy Plant growth regulators Absorption coefficient Least squares support vector machines Multi-class classification
摘要
应用太赫兹时域光谱技术获取了赤霉素、 氯吡脲和噻苯隆的太赫兹时域谱图和参考信号的时域谱图, 并计算获得了折射率谱和吸收谱。 实验结果显示, 这三种植物生长调节剂在太赫兹波段内有着明显的特征吸收峰。 而后基于最小二乘支持向量机对十九种不同物质的太赫兹时域吸收光谱进行了分类检测, 并采用遗传算法和粒子群寻优算法对其进行了优化, 最后通过添加噪声测试了模型的鲁棒性。 该研究验证了太赫兹时域光谱技术用于药物成分检测的可行性, 为植物生长调节剂的检测和鉴别提供了新的实验方法。
Abstract
The terahertz spectra of gibberellin, forchlorfenuron and thidiazuron in the range of 0.2 to 2.0 THz were obtained by THz time-domain spectroscopy, based on which their absorption and refraction spectra were calculated. The results showed that all of them had obvious characteristic absorption peaks in the terahertz band. The terahertz absorption spectra of nineteen different substances were classified and tested by least squares support vector machine. Particle swarm optimization and genetic algorithm were applied for the parameter optimization of the least squares support vector machine, and the stability of the model was tested with noise addition. This study demonstrates the feasibility of terahertz spectroscopy for identification of plant growth regulators and will provide a new approach for the detection of plant growth regulators.
陈锡爱, 武雪, 张松, 王凌. 基于太赫兹光谱的植物生长调节剂检测技术研究[J]. 光谱学与光谱分析, 2018, 38(3): 665. CHEN Xi-ai, WU Xue, ZHANG Song, WANG Ling. Study of Plant Growth Regulators Detection Technology Based on Terahertz Spectroscopy[J]. Spectroscopy and Spectral Analysis, 2018, 38(3): 665.