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題名 | 資料處理對於稻穀食味主要成分之近紅外線校正線之影響=Data Processing Affecting the Nir Calibration Curves of Major Constituents of Rough Rice Taste |
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作者 | 李汪盛; 蕭介宗; Li, Wang-sheng; Shaw, Jai-tsung; |
期刊 | 農業機械學刊 |
出版日期 | 19961200 |
卷期 | 5:4 1996.12[民85.12] |
頁次 | 頁19-34 |
分類號 | 434.251 |
語文 | chi |
關鍵詞 | 近紅外線; 校正線; 稻穀; 一次差分; 二次差分; Near-infrared; Calibration curve; Rough rice; First difference; Second difference; |
中文摘要 | 本研究之目的為探討均勻的樣本挑選、一次差分、二次差分與波長選擇對於整粒稻穀與粉碎稻穀之含水蠱、蛋白質、直鏈澱粉、脂肪酸度之近紅外線校正線之影響。結果顯示,整粒稻穀與粉碎稻穀含水率及蛋白質近紅外線校正線均以二次差分之校正線較佳。 整粒稻穀含水率校正線所選定之波長為1152、1276、1328、1912nm,相關係數 r 為 0.992,驗證標準偏差(SEP)為0.346%w.b.。粉碎稻穀含水率校正線所選定之波長為 1560、1912、2344nm, 相關係數r為0.981, 驗設標進偏差為 0.416% w.b. 。整粒稻穀蛋白質校正線所選定之波長為1228、1456、1636、169C、1756、 2220、2360nm,相關係數r為0.876,驗證標準偏差為0.665%d.b.。粉碎稻穀蛋白質校正線所選定之波長為 1356、1628、2056、2184nm, 相關係數r為 0.931, 驗證標準偏差為 0.396%d.b. 。均勻樣本之挑選及配合一次差分或二次差分可以有 效提昇合水率及蛋白質校正線之預測準確度。有關直鏈澱粉及脂肪酸度的校正線,可能因為不均勻顆粒,品種間的變異,加上化學分析之差異等綜合影響 , 雖用上述相同的資料處理仍未能達到理想的校正線 及預測結果 , 尚待繼續研究。 |
英文摘要 | The study is to evaruate the effect of data processing including the uniform sample selection, first and second differences, and wavelength selection on the moisture content, protein content, amylose content and fat acidity of whole kernel and powdered rough rice for NIR calibrations. The results show the calibration curves of moisture content and protein content for whole kernel and powdered rough rice will be better with second difference treatment. For moisture content, the calibration curve of whole kernel rough rice has a 0.992 correlation coefficient with a 0.335%w.b. SEP at 1152, 1276, 1328 and 1912 nm wavelength. For powdered rough rice, the calibration curve of moisture content has a 0.981 correlation coefficient with a 0.416%w.b. SEP at 1560, 1912 and 2344 nm. For protein content, the calibration curve of whole kernel rough rice has a 0.876 correlation coefficient with a 0.665%d.b. SEP at selected wavelengths 1228, 1456, 1636, 1692, 1756, 2220 and 2360 nm, but for powdered rough rice, the correlation coefficient and SEP will be respectively 0.931 and 0.396%d.b. at 1356, 1628, 2056 and 2184 nm wavelength. Therefore, uniform sample selection, first and second differences are able to improve the prediction accuracy of calibration curves of moisture and protein content. For the calibration of amylose content and fat acidity, some combined factors may affect the correlation coefficient and standard errors of performance. These factors could be a non-uniform particle size in NIR testing, variation in sample species, and poor duplication in chemical analysis. Even after the same data processing mentioned above, the result still remains not quite acceptable. Therefore, further study may be required for better calibration and prediction. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。