【摘要】 以镇江香醋中还原糖定量分析为例,研究小波分析中模极大值法在建立预测模型方面的应用,对基于模极大值处理光谱信息前后的预测模型进行比较发现,该方法可以有效地消除光谱的平移误差,且具备一定的分峰效果和提取光谱信息的功能,因此预测模型的预测精度和稳定性都有较大的提高,在光谱定量分析中有广泛的应用前景。更多还原

【Abstract】 In inspection of reducing sugar in “Zhenjiang vinegar”, modulus maxim um method is used to near infrared(NIR) spectroscopic analysis. By comparing the two mathematical models that one is based on the NIR spectra after modulus maxi mum preprocessing, the other is on original spectral data, the results show mod ulus maximum method eliminates the basic line in NIR spectra, separates the ove rlapping peaks in spectra and extract the information of NIR spectra. The mathe matic model based on the modulus maximum shows better precision and the stabiliz ation than the original model. All these prove that modulus maximum method is f it for NIR spectroscopic analysis and has promising future.更多还原