Spectroscopy and Spectral Analysis, Volume. 41, Issue 1, 243(2021)
Detection on Firmness and Soluble Solid Content of Peach During Different Storage Days
Figures & Tables(11)
Fig. 3. Average spectrum of peach in different storage days
(a): Diffuse transmittance; (b): Diffuse reflectance
Fig. 4. PLS models of SSC and Firmness of peach under two detection methods
(a): Diffuse transmittance; (b): Diffuse reflectance
Fig. 5. The results of two wavelength selection algorithms
(a): The selected result of UVE; (b): The selected result of SPA
Fig. 6. Optimal model after characteristic wavelength selection
(a): Diffuse reflectance; (b): Diffuse transmittance
Fig. 7. Regression coefficients of SSC and Firmness of peach
(a): SSC; (b): Firmness
Table 1. Sample set division
View tableView in ArticleTable 1. Sample set division
样本集 漫透射 漫反射 糖度/°Brix 硬度/N 糖度/°Brix 硬度/N 校正集 预测集 校正集 预测集 校正集 预测集 校正集 预测集 样品个数 267 89 261 86 261 81 265 84 范围 8.1~16.9 9~15.1 0.8~8.52 0.79~8.04 7.6~16.9 8.1~16.3 0.72~9.34 0.79~7.78
Table 2. Parameter changes of peach in different storage days
View tableView in ArticleTable 2. Parameter changes of peach in different storage days
参数 天数 平均值 最大值 最小值 标准差 变异系数
CV/%糖度 0 12.37 16.8 7.7 1.68 13.58 2 11.64 16.9 7.6 1.85 15.89 4 12.42 16.8 9.1 1.69 13.61 6 12.78 15.1 10.1 1.45 11.35 硬度 0 5.02 10.20 1.92 1.93 38.45 2 3.61 6.06 1.53 1.04 28.81 4 2.65 5.04 1.27 0.88 33.21 6 2.07 4.28 0.72 0.88 42.51
Table 3. Comparison of sugar and firmness models under different pretreatment methods
View tableView in ArticleTable 3. Comparison of sugar and firmness models under different pretreatment methods
参数 检测方式 预处理方法 LVs R pR cRMSEP RMSEC 糖度(SSC) 漫透射 无 14 0.873 0.911 0.751 0.711 S-G+3* 14 0.885 0.874 0.716 0.836 S-G+5* 14 0.889 0.865 0.705 0.865 Normalization 13 0.863 0.907 0.815 0.725 MSC 12 0.886 0.902 0.727 0.744 Baseline 13 0.868 0.886 0.768 0.797 漫反射 无 9 0.796 0.803 1.068 1.014 S-G+3* 11 0.820 0.822 1.003 0.968 S-G+5* 13 0.818 0.810 0.995 0.997 Normalization 8 0.786 0.791 1.085 1.040 MSC 8 0.817 0.815 1.02 0.985 Baseline 9 0.796 0.802 1.072 1.016 硬度
(Firmness)漫透射 无 10 0.797 0.803 0.982 0.967 S-G+3* 10 0.798 0.798 0.978 0.979 S-G+5* 10 0.799 0.797 0.977 0.982 Normalization 7 0.794 0.800 0.982 0.975 MSC 7 0.797 0.798 0.975 0.978 Baseline 10 0.794 0.804 0.988 0.975 漫反射 无 7 0.831 0.854 0.846 0.874 S-G+3* 7 0.827 0.849 0.853 0.889 S-G+5* 7 0.818 0.844 0.872 0.901 Normalization 6 0.835 0.851 0.833 0.883 MSC 6 0.828 0.854 0.852 0.874 Baseline 7 0.828 0.856 0.851 0.869
Table 4. PLS models of two wavelength selection algorithms
View tableView in ArticleTable 4. PLS models of two wavelength selection algorithms
参数 检测方式 样本选择算法 变量个数 R pR cRMSEP RMSEC 糖度(SSC) 漫透射 UVE 245 0.849 0.821 0.827 0.984 SPA 54 0.785 0.807 0.959 1.018 漫反射 UVE 37 0.694 0.794 1.236 1.034 SPA 54 0.709 0.699 1.229 1.216 硬度
(Firmness)漫透射 UVE 264 0.775 0.800 1.028 0.974 SPA 15 0.798 0.789 0.976 0.998 漫反射 UVE 113 0.841 0.870 0.829 0.829 SPA 37 0.824 0.841 0.856 0.910
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Yan-de LIU, Yu ZHANG, Xiao-gang JIANG, Xu-dong SUN, Hai XU, Hao-chen LIU. Detection on Firmness and Soluble Solid Content of Peach During Different Storage Days[J]. Spectroscopy and Spectral Analysis, 2021, 41(1): 243
Paper Information
Category: Research Articles
Received: Dec. 27, 2019
Accepted: --
Published Online: Apr. 8, 2021
The Author Email: Yan-de LIU (jxliuyd@163.com)
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