title: [Research on model and wavelength selection of near infrared spectral information].
abstract: Based on stepwise linear regression, and according to the theory of near infrared absorbption, spectrum (1000-2500 nm) obtained by detector was divided into three ranges, which were I (1000-1400 nm) and II (1400-1860 nm) and III (1860-2500 nm). In each range the regression wavelengths of different wavelength gaps were picked up stepwise. Regression coefficients and parameters were calculated by Matlab5.3 Program. Regression models were built up in different ranges with different wavelength gaps. Best models could be determined. Prediction results of protein content of ground wheat were displayed in scatter plots. Different results were discussed and compared, which has referencemeaning for application.
authors.affiliation: Physics College, Jilin University, Changchun 130025, China.
authors.forename: Yong-mei
authors.initials: YM
authors.lastname: Zheng
authors.forename: Jun
authors.initials: J
authors.lastname: Zhang
authors.forename: Xing-dan
authors.initials: XD
authors.lastname: Chen
authors.forename: Xuan-guo
authors.initials: XG
authors.lastname: Shen
authors.forename: Tie-qiang
authors.initials: TQ
authors.lastname: Zhang
mesh_terms: D016014:Linear Models; D008956:Models, Chemical; D012106:Research; D019265:Spectroscopy, Near-Infrared / Q000379:methods*; D014908:Triticum / Q000737:chemistry*