So extracting effective information from NIR spectrum and optimizing the original spectrum data are crucial to develop ideal mathematical model in NIRS.
从原始光谱中提取有效信息，对原始数据进行优化处理，成为近红外光谱分析中建立较理想数学模型的关键。
The ratio of the reflectance in visible and NIR is highly correlated with nitrogen applied to the plant. The nitrogen contents in the plant can be obtained by measuring spectrum reflectance.
植物氮素含量与可见光和近红外光反射系数的比具有很好的相关性，因此利用光谱反射系数可以测定植物氮素含量，为合理的施用养分提供依据。
The optical properties were investigated by UV-vis-NIR spectroscopy and photoluminescence (PL) spectrum.
其光学性质经过紫外可见光、光致发光光谱测试。
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