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可見/近紅外光譜結(jié)合軟化指標(biāo)快速判定沙果貨架期
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國家自然科學(xué)基金資助項(xiàng)目(31271973),、高等學(xué)校博士學(xué)科點(diǎn)專項(xiàng)科研基金資助項(xiàng)目(20101403110003)和山西省自然科學(xué)基金資助項(xiàng)目(2012011030-3)


Detection of Shelf Life of Malus asiatica Using Near-infrared Spectroscopy and Softening Index
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    摘要:

    基于可見/近紅外光譜技術(shù)探討利用軟化指標(biāo)對(duì)不同貨架期沙果進(jìn)行分類的可行性,。以SNV為最優(yōu)預(yù)處理結(jié)合PLS建立軟化指標(biāo)模型,,經(jīng)優(yōu)化后其校正和預(yù)測(cè)模型的決定系數(shù)R2分別為0.847和 0.813,。證實(shí)軟化指標(biāo)與光譜數(shù)據(jù)之間存在很高的相關(guān)性,,可以以軟化為指標(biāo)對(duì)不同貨架期的沙果進(jìn)行分類,。分別采用非線性的LS-SVM和線性的PLS-LDA建立分類模型,,結(jié)果表明:利用LS-SVM所建模型得到的效果要優(yōu)于PLS-LDA模型,其正確識(shí)別率和正確拒識(shí)率都達(dá)到了94%,。

    Abstract:

    The classified feasibility of Malus asiatica fruit by using near-infrared spectroscopy (VIS/NIR spectrometer) and softening index during different shelf life was analyzed. A mathematical model was established by combining partial least square (PLS) and standard normalized variate (SNV) which was regarded as the best pre-processing technology. The determination coefficients (R2) of calibration set and prediction set were 0.847 and 0.813 respectively, which illustrated that there was a high correlation between spectrum and the softening index. It showed that the softening index could be used to classify Malus asiatica samples during different shelf life. The LS-SVM and PLS-LDA were applied to build classification models, respectively. The results indicated that non-linear LS-SVM model was more suitable for classification of Malus asiatica samples than linear PLS-LDA model. The average correct recognition rate and average correct rejection rate were above 94%.

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薛建新,張淑娟,孫海霞,周靖博.可見/近紅外光譜結(jié)合軟化指標(biāo)快速判定沙果貨架期[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2013,44(8):169-173. Xue Jianxin, Zhang Shujuan, Sun Haixia, Zhou Jingbo. Detection of Shelf Life of Malus asiatica Using Near-infrared Spectroscopy and Softening Index[J]. Transactions of the Chinese Society for Agricultural Machinery,2013,44(8):169-173.

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  • 在線發(fā)布日期: 2013-07-19
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