%A Lü Qiang;TANG Ming-jie;ZHAO Jie-wen;CAI Jian-rong*;CHEN Quan-sheng %T Study of Simplification of Prediction Model for Kiwifruit Firmness Using Near Infrared Spectroscopy %0 Journal Article %D 2009 %J SPECTROSCOPY AND SPECTRAL ANALYSIS %R 10.3964/j.issn.1000-0593(2009)07-1768-04 %P 1768-1771 %V 29 %N 07 %U {https://www.gpxygpfx.com/CN/abstract/article_2681.shtml} %8 2009-07-01 %X To simplify the prediction model of kiwifruit firmness, SNV was used to preprocess the near infrared(NIR)spectra (1 000-2 500 nm)of kiwifruit. PLS model simplification by optimizing spectral intervals and decreasing the number of factors through net analyte preprocessing(NAP)was carried out. Results showed that the performance of NAP/PLS model is the best. It was achieved with 5 factors in five wavenumber ranges(5 189-5 370, 4 549-4 620, 6 049-6 230, 6 999-7 730, and 6 249-6 614 cm-1). The optimal model was achieved with R2=0.819 41 and RMSECV=0.701 77 in the calibration set and R2=0.780 67 and RMSEP=0.882 71 in the prediction set. This indicates that the model not only may efficiently simplify PLS model, but also may improve precision and predictive ability.