Table 4 Model equations and statistics for the mixed-linear models of MOEb,stat with tree-only, log-only, and tree and log variables (AWV acoustic wave velocity, ρb basic density)
Model | Equation and parameters | RMSE | R2 |
|---|---|---|---|
(2) Tree | MOEb,stat = − 1.41 + 2.31 AWVtree + 9.18 ρb tree | 2.01 | 0.22 |
(4) Log | MOEb,stat = −1.95 + 4.11 AWVlog | 1.93 | 0.28 |
(9) Tree-log | MOEb,stat = − 3.5 + 0.86 AWVtree + 3.57 AWVlog + log position (bottom = 0, middle = 0.12, top = 0.018) | 1.94 | 0.26 |