[1] [1] Environmental Protection Department, State Administration for Quality Supervision and Quarantine. Thermal Power Plant Air Pollutant Emission Standards. GB1322-2011[S]. Beijing: China Environmental Science Press, 2012.

[2] [2] Zhu Weidong. Flue gas desulfurization and denitration monitoring and ammonia escape detection in thermal power plant[J]. Analytical Instrumentation, 2010, (1): 88-94.

[3] [3] Sun Youwen, Liu Wenqing, Wang Shimei, et al.. Non- dispersive infrared multi- component gas analysis technology and its application in CEMS[J]. Infrared, 2011, 32(5): 23-26.

[4] [4] Yuan Song, Kan Ruifeng, He Yabai, et al.. Tunable diode laser spectroscopy system for carbon dioxide monitoring[J]. Chinese J Lasers, 2014, 41(12): 1208003.

[5] [5] Feng Mingchun, Gao Minguang, Xu Liang, et al.. Concentration monitoring of O3 based on Fourier transform infrared spectroscopy and its variation analysis[J]. Chinese J Lasers, 2011, 38(s1): s115003.

[6] [6] Wang J, Xie P, Li A, et al.. Measurement of ammonia by a portable UV-DOAS gas sensor based on multi-pass cell[C]. SPIE, 2010, 7853: 78533B.

[7] [7] Zhu Jin, Sun Dongmei, Chen Ling. Study of concentration retrieving algorithm for ammonia based on differential optical absorption spectroscopy[J]. Acta Optica Sinica, 2013, 33(2): 0230004.

[8] [8] Zheng Nina, Xie Pinhua, Ling Liuyi, et al.. Detection of atmospheric SO2 and O3 using optical fiber coupling long-path differential optical absorption spectroscopy system with UV Light emitting diodes[J]. Acta Optica Sinica, 2013, 33(3): 0301007.

[9] [9] Zhang Y G, Wang H S, Somesfalean G, et al.. Broadband UV spectroscopy system used for monitoring of SO2 and NO emissions from thermal power plants[J]. Atmospheric Environment, 2010, 44(34): 4266-4271.

[10] [10] U Platt, D Perner, H Paetz. Simultaneous measurement of atmospheric CH2O, O3 and NO2 by differential optical absorption[J]. J Geophys Res, 1979, 84(10): 6329-6335.

[11] [11] J M C Plane, C F Nien. Differential optical absorption spectrometer for measuring atmospheric trace gases[J]. Rev Sci Instrum, 1992, 63(3): 1867-1876.

[12] [12] Mellqvist J, Rosen A. DOAS for flue gas monitoring—I. temperature effects in the UV/visible absorption spectra of NO, NO2, SO2 and NH3[J]. J Quantitative Spectroscopy and Radiative Transfer, 1996, 56(2): 187-208.

[13] [13] Jiao Dan, Wu Xianliang. Recovery of signal from transient scattered response contaminated by Gaussian white noise based on orthogonal bases of compactly supported wavelets in frequency domain[J]. Acta Electronica Sinica, 1999, 27(6): 120-122.

[14] [14] Chen Cong, Lu Qipeng, Peng Zhongqi. Preprocessing methods of near-infrared spectrum based on NLMS adaptive filtering[J]. Acta Optica Sinica, 2012, 32(5): 0530001.

[15] [15] Huang N E, Shen Z, Long S R, et al.. The empirical mode decomposition and the Hilbert spectrum for nonlinear and non-stationary time series analysis[J]. Proc Royal Society of London A: Mathematical, Physical and Engineering Sciences, 1998, 454(1971): 903-995.

[16] [16] Zhao X, Patel T H, Zuo M J. Multivariate EMD and full spectrum based condition monitoring for rotating machinery[J]. Mechanical Systems and Signal Processing, 2012, 27(1): 712-728.

[17] [17] Wang Huanxue, Liu Jianguo, Zhang Tianshu, et al.. An empirical mode decomposition algorithm based on cross validation and its application to lidar return signal de-noising[J]. Chinese J Lasers, 2014, 41(10): 1014001.