Abstract:In the present study,the rapid prediction of wood modulus of elasticity (MOE) of Eucalyptus pellita by near infrared (NIR) spectroscopy is described. Fast Fourier transform (FFT) and conventional mechanical testing methods were used to measure modulus of elasticity of small clear wood samples of Eucalyptus pellita. After collecting the near-infrared reflectance spectra of each sample from radial and tangential faces,the NIR spectra were preprocessed with the second-derivative methods, and regression models were built between 410 to 2 480 nm. The calibration models were established using two thirds of whole samples with the partial least squares method, and validation models were developed on an independent set (one third of whole samples). The analysis results showed that high correlation coefficients were obtained between the laboratory-determined MOE values and NIR prediction values of Eucalyptus pellita. The correlation coefficients of prediction model for MOE were 0.93 and 0.81,and RPD were 2.70 and 1.71. NIR analysis technique can realize the rapid prediction of the MOE of small clear wood samples of Eucalyptus pellita.
Key words:Near infrared (NIR) spectroscopy;Wood of Eucalyptus pellita;Modulus of elasticity
[1] Batten G D. Journal of Near Infrared Spectroscopy,1998,6(1):105. [2] LU Wan-zhen,YUAN Hong-fu,XU Guang-tong,et al(陆婉珍,袁洪福,徐广通,等). Modern Near Infrared Spectroscopy Analysis Technology(现代近红外分析技术). Beijing:China Petrochemical Press(北京:中国石化出版社),2001. 2. [3] Osborne B G,Fearn T. Near Infrared Spectroscopy in Food Analysis. UK,1998. [4] Wright J A,Birkett M D,Gambino M J T. TAPPI Journal, 1990,73(8):164. [5] Conway J M,Norris K H,Bodwell C E. American Journal of Clinical Nutrition,1984,40(6):171. [6] Kelley S S,Rials T G,Groom L H, et al. Holzforschung,2004,58(3):252. [7] Kelley S S,Rials T G,Snell R,et al. Wood Science and Technology,2004,38:257. [8] Hoffmeyer P, Pedersen J G. Holz als roh-und Werkstoff,1995,53:165. [9] Thumm A,Meder R. Journal of Near Infrared Spectroscopy,2001,9(3):117. [10] Schimleck L R,Evans R,Ilic J. IAWA Journal,2001,22(4):415. [11] Schimleck L R,Anthony J M,Carolyn A R. Appita Journal,2000,53(4):318. [12] Schimleck L R,Wright P J,et al. Appita Journal, 1997,50(1):40. [13] YU Hua-qiang,ZHAO Rong-jun,FU feng,et al(虞华强,赵荣军,傅 峰,等). Journal of Northwest Forestry University(西北林学院学报),2007,22(5):149. [14] Jones P D,Schimleck L R,Peter G F,et al. Canadian Journal of Forest Research,2005,35(1):85. [15] Williams P C,Sobering D C. Journal of Near Infrared Spectrosc.,1993,1:25. [16] Schimleck L R,Doran J C,Rimbawanto A. J. Agric. Food Chem.,2003,51:2433.