Table 3 Calculation results and fitting effects of three attenuation function parameters

\({{{\rm{d}}}_{ij}}^{-\alpha }(\alpha \, > \,0)\)

W_con

1.667065

0.72

0.25

0.12

×

W_agr

−0.008259(×)

0.49

0.46

0.16

×

W_eco

0.358993

0.40

0.50

0.18

√

\(\exp (-\beta {d}_{ij})(\beta \, > \,0)\)

W_con

0.004507

0.74

0.24

0.11

√

W_agr

0.000252

0.50

0.45

0.16

√

W_eco

−0.025210(×)

0.59

0.34

0.15

×

\(\exp (-\gamma {{d}_{ij}}^{2})(\gamma \, > \,0)\)

W_con

5.14*e^(-6)

0.74

0.23

0.11

×

W_agr

5.89*e^(-7)

0.51

0.44

0.16

×

W_eco

−1.674612(×)

0.58

0.35

0.15

×