Field filming effectiveness and the particle distribution of the inlet facilities of gas turbine has been investigated with PDA, so as to provide information for the organization of different inlet facilities, with the purpose of reducing resistance while increasing the separating effectiveness at the same time.

The simulation results show that there is a gain competitive process among multi-channels which relied on the energy state population distribution of EDTFA.

Based on the rate equations and light propagation equations,the model of Er 3+/Yb 3+ co-doped double clad fiber amplifiers has been discussed,and the population distribution characteristics of Er 3+ upper level in Er 3+/Yb 3+ co-doped double clad fiber amplifier pumped at 980nm bands have been analyzed by using the results of numerical simulation.

The absorption coefficient and scattering coefficient were measured with the Aethalometre and Integrating Nephelometer,and at the same time,the number density distributions of aerosol particles were measured by the OPC with nominated radii.