1, The exponential equation is used in master getting system in order to develop hero growth curve individually with a slowing down growth rate.

2, The comparison between unbiased GM (1,1) model and exponential equation model is given by theoretical analysis and examples computation.

3, When the pesticides were applied with rice-hull carrier the dynamics of residual degradation exprespse as two exponential equation reaction.

4, The results show that the COD at the inflow and outflow follows the rule of exponential equation.

5, Through mathematic analysis, the author of this paper comes to a conclusion that negative exponential equation can not be used to elucidate the regularity of the settling of suspended matter.

6, The variograms of arsenic persistently increased and could be fitted by exponential equation.