The model is good by predicting protein concentration of wheat flour with different unknown sample groups. Its error is less than 1 0.

对不同未知样本进行了预测，结果表明，所建模型具有一定的稳定性，对未知样品蛋白质浓度的测量偏差较小，其最大偏差不超过1 .0。

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The result shows that measurement standard error reaches minimum 0.027 for most milk sample and satisfies the national criterion of protein detection when dilution ratio ranges from 6.2 to 7.4.

结果表明，对于大多数的牛乳样品，当其稀释倍率在6.2至7.4范围内时，测量标准偏差达到最小值0.027，满足蛋白质检测国家标准。

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