中文摘要：

南疆红枣的分级目前还停留在外部品质,然而红枣的内部品质比外部品质更重要。红枣的内部品质包括糖度、酸度等。利用近红外漫反射光谱技术对南疆红枣糖度进行无损检测,应用傅立叶变换近红外光谱仪采集红枣光谱图,糖度的测定选用数字阿贝折射仪。分别选用偏最小二乘法（PLS）和主成分回归分析法（PCR）的化学计量学方法建立红枣校正模型,光谱数据预处理选择一阶导数光谱、平滑等,得到的校正相关系数（Rc）为0.942 5,预测相关系数（Rp）为0.910 4,校正标准偏差（SEC）值为1.02。预测标准偏差（SEP）值为0.836,主因子数为5。

英文摘要：

classification is still stuck in the external quality of jujube in south Xinjiang,but interior quality is more important than external quality of jujube.Internal quality of jujube including sugar content,acidity etc.The experiment is using near-infrared diffuse reflectance Spectroscopy Technique of jujube in south Xinjiang sugar content for non-destructive testing,acquisition date of the application of Fourier Transform near infrared spectrometer spectrum,determination of sugar content using digital Abbe refractometer.Each selection of Partial Least Squares（PLS） and the principal component regression analysis（PCR） of chemometrics methods to establish date correction model,spectral data preprocessing select one of the first order derivative Spectrophotometry,smooth,and so on,get the correlation coefficient correction（RC） for 0.9425,predicting the correlation coefficient（RP） is 0.9104,the standard deviation correction（SEC） is 1.02.Prediction of the standard deviation（Sep） value is 0.836,the main factor accounting for 5.