Model

C1

C2

C3

C4

Model 1: Huang et al. [12]

3.6

0.8

1.2 + 0.25 exp ( 0.05 / M t 3 )

1.2 0.25 exp ( 0.05 / M t 3 ) 1.2 + 0.25 exp ( 0.05 / M t 3 ) 1.2 + 0.25 exp ( 0.05 / M t 3 )

Model 2: proposal model

3 ( 1.0 0.8 M t 2 )

0.8 ( 1 + 0.45 M t 2 ) e 0.015 M c

1.2 + 0.25 exp ( 0.05 / M t 3 )

1.2 0.25 exp ( 0.05 / M t 3 )