Official Journal of the Japan Wood Research Society
Table 2 Developed models for stem diameter in relation to cambial age and obtained AIC values in each model
Model | Equation | Random effects | AIC |
|---|---|---|---|
a-1 | \(\mathrm{D}_{ij}=\left({a}_{0}+{Tree}_{0j}\right)\mathrm{exp}\left(-{e}^{{a}_{1}-{a}_{2}\mathrm{CA}_{ij}}\right)+{e}_{ij}\) | Asymptotic value | 236.15 |
a-2 | \(\mathrm{D}_{ij}={a}_{0}\mathrm{exp}\left(-{e}^{{a}_{1}+{Tree}_{1j}-{a}_{2}\mathrm{CA}_{ij}}\right)+{e}_{ij}\) | Start position of the curve | − |
a-3 | \(\mathrm{D}_{ij}={a}_{0}\mathrm{exp}\left(-{e}^{{a}_{1}-\left({a}_{2}+{Tree}_{2j}\right)\mathrm{CA}_{ij}}\right)+{e}_{ij}\) | Slope | 293.66 |