未知样品 meaning in Chinese

unknown sample

The spectrum used for modal set is transmitted to pc by rs232 . to get the relation between the spectrum and nutrition component ' s concentration , we set up the modal used method of stepwise regression in pc , transmit the coefficient of modal to apparatus , then we can predict the nutrition component ' s concentration of the wheat sample
通过rs232串口，将建模样品的光谱上传到pc机。在pc机上采用逐步回归建模，得到营养成分浓度与光谱的关系，将模型的系数传同仪器，即可预测未知样品营养成分的浓度。
Results show that relative standard deviation ( rsd ) of prediction value will become larger from 2 . 5 % to 4 . 72 % with energy decreasing form 100 % to 18 % . it is demonstrated that energy will not significantly affect predictive power by analysis of variance , because 3 samples f - value is 1 . 62 , 3 . 02 and 2 . 23 that all less than critical value f0 . 05 = 3 . 35
不同能量下的预测值与化学值相关直线的t检验( = 0 . 05 )表明各相关直线均无显著性差异；模型预测值的方差分析( = 0 . 05 )表明仪器能量变化并不会使未知样品预测值产生显著性差异。