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不同貯存溫度蜂花粉的可見-近紅外光譜鑒
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of Visible/Near Infrared Spectroscopy for Discrimination of Bee Pollen under Different Storage Temperature
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    摘要:

    利用可見-近紅外光譜技術結合最小二乘支持向量機(LS-SVM)對不同貯存溫度下的蜂花粉進行鑒別,。選擇-20,、4、15,、25和40℃ 5個溫度下分別貯存60d后的蜂花粉為研究對象。對原始光譜數(shù)據(jù)進行平滑和附加散射校正(MSC)的預處理后進行主成分分析,,選擇4~20個主成分作為輸入變量進行LS-SVM建模,。模型預測參數(shù)比較結果顯示,當主成分數(shù)取20時模型的預測效果最好,,預測相關系數(shù)r2p≥0.9919,,預測標準偏差(SEP)和預測均方根誤差(RMSEP)分別為1.7854和1.7675,優(yōu)于偏最小二乘回歸(PLS)的預測結果,,說明基于LS-SVM的可見-近紅外光譜技術能夠很好地對蜂花粉貯存溫度進行檢測,。

    Abstract:

    In order to develop a fast and efficient method to determine the freshness of bee pollen, visible and near infrared (Vis/NIR) spectroscopy combined with least square support vector machine (LS-SVM) was applied to identify the samples of bee pollen under the different storage temperature. Five storage temperatures including -20, 4, 15, 25 and 40℃ were set. The Camellia pollens stored for 60 days at different set temperatures were investigated. Spectra were acquired by an ASD fieldspec spectrometer. As the pretreatments of the optimal smoothing way, moving average with three segments and multiplication scatter correction (MSC) were applied to reduce the noise of the spectra. After the principle component analysis of the spectra from 400 to 1000 nm, 4 to 20 principal components (PCs) were chosen as the inputs of LS-SVM models. Results show that the r2p of the LS-SVM model with 20 PCs was more than 0.9919 in validation set, and was better than the traditional PLS model. The results also indicated that the PCs could reflect and represent the main characteristics of bee pollens stored at different temperatures, and the LS-SVM model could be used to discriminate the samples of bee pollen under the different storage temperature.

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金航峰,黃凌霞,金佩華,樓程富.不同貯存溫度蜂花粉的可見-近紅外光譜鑒[J].農(nóng)業(yè)機械學報,2009,40(Z1):134-137. of Visible/Near Infrared Spectroscopy for Discrimination of Bee Pollen under Different Storage Temperature[J]. Transactions of the Chinese Society for Agricultural Machinery,2009,40(Z1):134-137.

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