Yong HAO, Jiao-jun DU, Shu-min ZHANG, Qi-ming WANG. Research on Construction of Visible-Near Infrared Spectroscopy Analysis Model for Soluble Solid Content in Different Colors of Jujube[J]. Spectroscopy and Spectral Analysis, 2021, 41(11): 3385

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- Spectroscopy and Spectral Analysis
- Vol. 41, Issue 11, 3385 (2021)

Fig. 1. Samples of Dali jujube with different colours

Fig. 2. Schematic diagram of spectrum acquisition device

Fig. 3. Average spectra of jujube samples

Fig. 4. Original Vis-NIR spectra of Jujube samples and spectra after pretreatment with SNV
(a): Original Vis-NIR spectra; (b): Spectra after pretreatment with SNV
(a): Original Vis-NIR spectra; (b): Spectra after pretreatment with SNV

Fig. 5. RMSEP variation diagram of PLS models for jujube SSC established by samples with different colours for modeling sets

Fig. 6. Distribution of selected variables by MCUVE method

Fig. 7. Variations of RMSECV and RMSEP of mixed jujube model with PLS factors

Fig. 8. Correlation of SSC measured value and model predicted value
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Table 1. Statistics of SSC contents in jujube samples
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Table 2. Modelling results of PLS models for jujube SSC with different pretreatment methods
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Table 3. Predicted results of PLS models for SSC of single color jujube
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Table 4. Predicted results of PLS models for SSC of mixed color jujube samples
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Table 5. Analysis results of the models with modelling variables optimization

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