Research Article
A Copula-Based Method for Estimating Shear Strength Parameters of Rock Mass
Table 6
The parameter
of 2D Copula functions and the values of AIC.
| | Copula type | | θ (Q-f) | AIC (Q-f) | θ (Q-c) | AIC (Q-c) |
| | Nelsen No. 1 | | 2.396 | −67.990 | −0.653 | −61.777 | | Nelsen No. 2 | | 4.396 | −19.240 | 1.347 | −66.184 | | Nelsen No. 4 | | 2.198 | −66.341 | — | — | | Nelsen No. 5 | | 4.978 | −65.175 | −5.442 | −59.637 | | Nelsen No. 7 | | — | — | 0.634 | −44.658 | | Nelsen No. 8 | | — | — | 1.629 | −64.809 | | Nelsen No. 12 | | 1.465 | −67.648 | — | — | | Nelsen No. 14 | | 1.698 | −67.287 | — | — | | Nelsen No. 15 | | 2.698 | −65.360 | 1.173 | −60.240 | | Nelsen No. 18 | | 2.930 | −60.246 | — | — |
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