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。
A novel portable NIR spectrum instrument based on acoustooptic tunable filter is presented. The instrument can be applied to detect the ingredient concentration of liquid food.
提出了一种新型的基于声光可调滤光器(AOTF)的便携式近红外光谱测量仪，该仪器可用于液态食品的组分浓度的测量。
The relationship between the transmittance and leaching effect of the glasses was discussed by measuring UV VIS NIR spectrum.
用光谱仪测定多孔玻璃的紫外可见近红外光谱，对光谱透过率与浸析效果之间的关系作了定性分析。
The relationship between the transmittance and leaching effect of the glasses was discussed by measuring UV VIS NIR spectrum.
用光谱仪测定多孔玻璃的紫外可见近红外光谱，对光谱透过率与浸析效果之间的关系作了定性分析。
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