[1] National Research Council, Research priorities for airborne particulate matter-immediate priorities and a long-range research portfolio, Washington, D.C.: National Academy Press, 1998, Chapter 1. 
[2] Wang Mingxing. Atmospheric Chemistry(大气化学), 2nd Edition, Beijing: Weather Press, 1999(in Chinese). 
[3] Suess D T, Prather K A. Mass Spectrometry of Aerosols. Chem. Rev., 1999, 99: 3007-3035. 
[4] Xia Zhuhong, Feng Sumin, Fang Li, et al. Advances of Atmospheric Aerosol Mass Spectrometry. Chinese Journal of Quantum Electronics(量子电子学报), 2003, 20(2):147-151(in Chinese). 
[5] Han Jiawei, Kamber Micheline. Data Mining:Concepts and Techniques(数据挖掘：概念与技术), 2nd Edition, Beijing: China Machine Press, 2007, Chapter 7(in Chinese). 
[6] Xhoffer C, Bernard P, Van G R, et al. Chemical characterization and source apportionment of individual aerosol particles over the North Sea and the English Channel using multivariate techniques. Environ. Sci. Technol., 1991, 25: 1470-1478. 
[7] Bondarenko I, Treiger B, et al. IDAS: a Windows based software package for cluster analysis. Spectrochim. Acta, Part B, 1996, 51(4): 441-456. 
[8] Guo Xiaoyong, Zhu Yuan, et al. Real-time data acquisition and processing of atmosphere aerosol time-of-flight laser mass spectrometry. Chinese Journal of Quantum Electronics(量子电子学报), 2006, 23(2): 217- 221(in Chinese). 
[9] Hinz K P, Kaufmann R, et al. Simultaneous Detection of Positive and Negative Ions From Single Airborne Particles by Real-time Laser Mass Spectrometry. Aerosol Sci. Technol., 1996, 24: 233-242. 
[10] Kohonen T. The Self-Organizing Map. Proceedings of the Ieee, 1990, 78: 1464-1480. 
[11] Kohonen T. Self-Organizing Maps, 2nd Edition, Berlin: Springer, 1997. 
[12] Lin Ying, Guo Xiaoyong, et al. Data Analysis of Laser Desorption /Ionization Mass Spectrum of Individual Particle Using Adaptive Resonance Theory Based Neural Network. Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2009, 29(3): 580-584(in Chinese). 
[13] Murphy D M, Middlebrook A M, et al. Cluster analysis of data from the Particle Analysis by Laser Mass Spectrometry (PALMS) instrument. Aerosol Sci. Technol., 2003, 37(4): 382-391. 
[14] Barros A S, Rutledge D N, PLS_Cluster: a novel technique for cluster analysis. Chemometr. Intell. Lab., 2004, 70: 99-112. 
[15] Wang Huiwen, Partial Least-Squares Regression Method and Application(偏最小二乘回归方法及其应用), Beijing: National Defense Industry Press, 1999(in Chinese). 
[16] Lin Sheng, Bai Yin, Improvement of Hierarchical Cluster analysis method based on Partial Least Squares. Statistics and Decision(统计与决策), 2006, 14: 16-18(in Chinese). 
[17] Helland I S. Some theoretical aspects of partial least squares regression. Chemometr. Intell. Lab., 2001, 58: 97-107. 
[18] Jong S D, SIMPLS:An Alternative Approach to Partial Least Squares Regression. Chemometr. Intell. Lab., 1993, 18: 251-263. 
[19] Ding Huilin, Gao Li-xin, et al. Experimental Investigation of Atmosphere and Water Vapor with Laser Induced Breakdown Spectroscopy. Spectroscopy and Spectral Analysis(光谱学与光谱分析),2010, 30(1):1-5(in Chinese).