Research Article
Assessment for Thermal Conductivity of Frozen Soil Based on Nonlinear Regression and Support Vector Regression Methods
Table 3
Ternary fitting result of frozen soil thermal conductivity for 7 typical soils in the QTEC.
| Soil type | Fitting coefficients | R2 | a | b | c | d |
| Silty clay | −0.703 | 1.291 | 0.238 | 0.007 | 0.759 | Silt | −1.358 | 1.283 | 0.424 | 0.248 | 0.792 | Weathered rock | −0.102 | 1.370 | 0.183 | −0.854 | 0.895 | Fine sand | −0.220 | 1.290 | 0.146 | −0.429 | 0.908 | Gravel sand | −0.617 | 1.272 | 0.254 | −0.138 | 0.933 | Boulder | −1.257 | 1.049 | 0.497 | 0.702 | 0.865 | Breccia | −1.282 | 0.884 | 0.459 | 1.239 | 0.78 |
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