instrumental method短语¹⁴⁴⁹⁷²⁺² 基本例句 仪器分析法 Near infrared spectroscopy NIR is an instrumental method applied for rapidly measuring the NIR spectra of pulverized tobacco samples and computing the chemical compositions from the spectral data. 针对烟草样品的近红外 NIR光谱与其总糖含量非线性相关的特点，提出了一种混合算法用于建立近红外光谱的非线性模型。 cnki