8SY Du, D W Kang, XE Lei, et al. Numerical study on adjusting and controlling effect of forest cover ON PM1 0 and O 3[J].Atmospheric En- vironment, 2007 (41) : 797-808.
9Model 3321 Aerodynamic Particle Sizer, Spectrometer Instruction Manual, P/N 1930092, Revision E January 2004,.