不同光谱数据预处理方法和谱区范围，影响建立定量分析模型的质量。
Different spectral data preprocessing methods and spectral regions have influences on the performance of model established.
采用偏最小二乘法(PLS)建立定标模型，并对原始光谱进行预处理。
The NIRS calibration models were developed using the partial least squares (PLS) regression technique.
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