Abstract:Near infrared spectroscopy was applied to rapidly predict density, modulus of rupture and tensile strength parallel to grain of neosinocalamus affinins. Backward interval partial least squares (BiPLS) was used to find the most informative spectrum ranges, and build models based on raw spectra and pretreated spectra, including first derivative spectra, second derivative spectra, Savitzky-Golay smoothing spectra and standard normalized variate spectra. And partial least squares (PLS) models were also developed in the whole wavelength range 350~2 500 nm. The results show that compared with PLS models, BiPLS could effectively find the optimal spectrum regions and improve the predictive ability of models. The optimal models of density, modulus of rupture and tensile strength parallel to grain were obtained through BiPLS method that separated the whole spectra pretreated by standard normalized variate, second derivative and first derivative respectively into 20, 30 and 20 intervals. And the prediction models of density, modulus of rupture and tensile strength parallel to grain had correlation coefficient (r) 0.85,0.88 and 0.88, as well as root mean standard error of prediction (RMSEP) 0.052 4,0.018 5 and 0.029 2, respectively. The relation between NIR predicted values and actual values was good in all cases. Therefore, the experimental results demonstrated that NIR spectroscopy was promising for predicting the physical and mechanical properties of neosinocalamus affinins.
Key words:Near infrared spectroscopy;Backward interval partial least squares;Neosinocalamus affinins;Physical and mechanical properties
刘君良,孙柏玲,杨 忠. 近红外光谱法分析慈竹物理力学性质的研究 [J]. 光谱学与光谱分析, 2011, 31(03): 647-651.
LIU Jun-liang, SUN Bai-ling, YANG Zhong . Estimation of the Physical and Mechanical Properties of Neosinocalamus Affinins Using Near Infrared Spectroscopy . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2011, 31(03): 647-651.
[1] JIANG Ze-hui(江泽慧). Bamboo and Rattan in the World(世界竹藤). Shenyang: Liaoning Science and Technology Publishing House(沈阳: 辽宁科学技术出版社), 2002. 4. [2] XIAN Xing-juan, XIAN Ding-guo(冼杏娟,冼定国). Journal of Bamboo Research(竹子研究,汇刊), 1990, 9(3): 10. [3] ZHOU Fang-chun(周芳纯). Bamboo Research(竹类研究), 1998, (1): 195. [4] ZHOU Fang-chun(周芳纯). Bamboo Research(竹类研究), 1991, (1): 45. [5] McClure W F, Crowell B, Stanfield D L, et al. J. Near Infrared Spectrosc., 2002, 10(3): 177. [6] Via B K, Shupe T F, Groom L H, et al. J. Near Infrared Spectrosc., 2003, 11(5): 365. [7] Taylor A M, Baek S H, Jeong M K, et al. Wood and Fiber Science, 2008, 40(2): 301. [8] Thumm A, Meder R. J. Near Infrared Spectrosc., 2001, 9(1): 117. [9] 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. [10] YU Yan, JIANG Ze-hui, WANG Ge, et al(余 雁, 江泽慧, 王 戈, 等). Journal of Beijing Forestry University(北京林业大学学报), 2007, 29(4): 80. [11] YU Wen-ji, YU Yang-lun, JIANG Ze-hui(于文吉, 余养伦, 江泽慧). Journal of Northeast Forestry University(东北林业大学学报), 2006, 34(4): 3. [12] Nφrgaard L, Saudland A, Wagner J, et al. Applied Spectroscopy, 2000, 54: 413. [13] LIU Bing, BI Kai-shun, SUN Li-xin, et al(刘 冰, 毕开顺, 孙立新, 等). World Science and Technology-Modernization of Traditional Chinese Medicine(世界科学技术—中医药现代化), 2009, 11(3): 388. [14] YAN Yan-lu, ZHAO Long-lian, HAN Dong-hai, et al(严衍禄, 赵龙莲, 韩东海, 等). The Base and Application of Infrared Spectrum Analysis(近红外光谱分析基础与应用). Beijing: China Light Industry Press(北京: 中国轻工业出版社), 2005. 98. [15] LIU Li, YU You-ming, LIN Xin-chun, et al(刘 力, 愈友明, 林新春, 等). Journal of Zhejiang Forestry Science and Technology(浙江林业科技), 2006, 26(2): 19. [16] Suzuki K, Itoh T. Trees, 2001, 15(3): 137. [17] Schimleck L R, Evans R, Matheson A C. J. Wood Sci., 2002, 48(2): 132. [18] Via K B, Chi-Leung S, Shupe T F, et al. J. Near Infrared Spectrosc., 2005, 13(4): 201.