Table 3 Performance assessment of nonlinear mixed-effects model (6) using the Masson pine biomass data with autocorrelation structure autoregressive process of order one (AR (1)) and three variance functions (exponential function, power function, and constant plus power function), respectively (AIC denotes the Akaike information criterion; Log-likelihood denotes the logarithm likelihood; and variance function 1 means that the variances are homogeneous)

From: Integrating regional climate change into allometric equations for estimating tree aboveground biomass of Masson pine in China