. 2024 Aug 22;14:19478. doi: 10.1038/s41598-024-68935-1

Table 6.

Regression equations for undrained cohesion and moisture content after FTC.

Physical properties	Regression equations	$R^{2}$
Undrained cohesion after FTC
Upper	$y_{c_{U}} = 8.339 - 0.062 x_{1} + 0.045 x_{2} - 0.028 x_{3} - 0.054 x_{4} + 0.615 x_{5} - 0.013 x_{6} + 0.022 x_{5}^{2}$	0.801
Middle	$y_{c_{M}} = 29.219 - 0.616 x_{1} - 0.058 x_{2} - 0.12 x_{3} - 0.577 x_{4} - 0.094 x_{5} - 0.373 x_{6} + 0 .017 x_{1} x_{6}$	0.809
Lower	$y_{c_{L}} = 25.415 - 0.542 x_{1} - 0.054 x_{2} - 0.109 x_{3} - 0.511 x_{4} - 0.125 x_{5} - 0.337 x_{6} + 0 .016 x_{1} x_{6}$	0.815
Moisture content after FTC
Upper	$y_{ω_{U}} = 19.405 + 0.031 x_{1} + 0.043 x_{2} + 0.053 x_{3} + 0.253 x_{4} + 0.013 x_{5} - 0.185 x_{6} + 0.003 x_{6}^{2}$	0.822
Middle	$y_{ω_{M}} = 19 .173 + 0 .02 7 x_{1} + 0.038 x_{2} + 0.021 x_{3} + 0.5 x_{4} + 0.012 x_{5} - 0.128 x_{6} + 0.002 x_{6}^{2}$	0.928
Lower	$y_{ω L} = 21 .507 - 0.003 x_{1} + 0.026 x_{2} + 0.005 x_{3} + 0.522 x_{4} + 0.005 x_{5} - 0.152 x_{6} + 0.003 x_{6}^{2}$	0.904