[1] MA Benxue, YING Yibin, RAO Xiuqin, et al. Advance in nondestructive detection of fruit internal quality based on hyperspectral imaging［J］. Spectroscopy and Spectral Analysis, 2009, 29(6): 1611-1615.

[2] LIU Muhua, CHEN Quansheng, LIN Huaiwei. The study of nondestructive measurement of fruit internal qualities using spectral imaging［J］. Acta Optica Sinica, 2007, 27(11): 2042-2046.

[3] LIU Yande, CHEN Xingmiao, OUYANG Aiguo. Nondestructive measurement of soluble solid contentin gannan navel oranges by visible/ nearinfrared spectroscopy［J］. Acta Optica Sinica, 2008, 28(3): 478-481.

[4] LU R, PENG Y. Hyperspectral scattering for assessing peach fruit firmness［J］. Biosystems Engineering, 2006, 93(2): 161-171.

[5] NAGATA M, JASPER G Tallada, TAIICHI Kobayashi, et al. NIR hyperspectral imaging for measurement of internal quality in strawberries［C］. 2005 ASAE Annual International Meeting. Florida: American Society of Agricultural Engineers, 2005: 053131-053141.

[6] NOH H K, PENG Y, LU R. Integration of Hyperspectral reflectance and fluorescence Imaging for assessing apple maturity［J］. Transactions of the ASABE, 2007, 50(3): 963.

[7] PENG Yankun, LU Renfu. Analysis of spatially resolved Hyperspectral scattering images for assessing apple fruit firmness and soluble solids content［J］.Postharvest Biology and Technology, 2008, 48(1): 52-62.

[8] TIAN Haiqing, YING Yibin, LU Huishan, et al. Study on predicting firmness of watermelon by vis/NIR diffuse transmittance technique［J］. Spectroscopy and Spectral Analysis, 2007, 27（6）: 1113-1117.

[9] FU Xiaping, YING Yibin, LIU Yande, et al. Detection of pear firmness using near infrared diffuse reflectance spectroscopy［J］. Spectroscopy and Spectral Analysis, 2006, 26（6）：1038-1041.

[10] FU Xiaping, YING Yibin, LU Huishan, et al. Application of some different modeling algorithms to pear MTfirmness detection using NIR spectra［J］.Spectroscopy and Spectral Analysis, 2007, 27(5): 911-915.

[11] ZENG Yifan, LIU Chunsheng, SUN Xudong, et al. Nondestructive measurement of firmness of pear using visible and nearinfrared spectroscopy technique［J］. Transactions of the CSAE, 2008, 24（5）： 250-252.

[12] ZHAO Jiewen, CHEN Quansheng, SARITPORN Vittayapadung, et al. Determination of apple firmness using hyperspectral imaging technique and multivariate calibrations［J］. Transactions of the CSAE, 2009, 25(11): 226-231.

[13] ZHANG Hailiang, SUN Xudong. Experimental study on electricaldriven centrifugal nozzle of aerial spray［J］. Chinese Agricultural Mechanization, 2011, 1: 101-103.

[14] ZHANG Peng, LI Jiangkuo, MENG Xianjun, et al. Study on Nondestructive Measurement of firmness of Mopan persimmon using visible and near infrared diffuse reflection spectrocopy［J］. Science and technology of food industry, 2011, 32(7): 423-428.

[15] WANG Shuang, HUANG Min, ZHU Qibing. Optimal wavelength selection of hyperspectral scattering images based on UVEPLS projection analysis［J］. Acta Photonica Sinica, 2011, 40(3): 428-432.

[16] ZHU Xiaoli, YUAN Hongfu, LU Wanzhen. Progress and application of spectral datapretreatment and wavelength selection methods in NIRanalytical technique［J］. Progress in Chemistry, 2004, 16(4): 528-542.