5E. S. Semenov, A. S. Sokolik. Thermal and chemical ion- ization in flames[J].Combustion,Explosion and Shock Waves, 1972,6(1) : 33-43.
6Kgakgamatso Mphale, Mohan Jacob, Mal Heron.Pre- diction and Measurement of Electron Density and Col- lision Frequency in a Weakly Ionised Pine Fire[J]. International Journal of Infrared and Millimeter Waves, 2007(28): 251-262.
7C. J. Coleman, J. A. Boan. A Kirchhoff Integral Approach to Radio Wave Propagation in Fire[C].Antennas and Propagation Society International Symposium, 2007 IEEE.
8Kane S. Yee. Numerical solution of initial boundary value problems involving maxwell's equations in isotropic media[J]. IEEE Transactions on Antennas and Propagation, 1966, 14(3): 302-307.
9J.L. Young.A full finite difference time domain imple- mentation for radio wave propagation in a plasma[J]. Radio Science, 1994,29(6): 1513-1522.