STUDIES ON THE DENSITY AND THINNING EXPERIMENTS OF CHINESE FIR SIANDS VARIABLE RELATIVE TREE HEIGHT CURVE MODEL AND ITS APPLICATION IN TREE VOLUME ESTIMATION Using Segmented Modeling Approach to Construct Tree Volume and Biomass Equations for Larch in Northeastern China Study on Consociation Equation Set Model Method to Establish Duality\n Standing Tree Volume Model Application of Mixed Effects Models in Forest Growth Model Establishment of Tree Volume and Aboveground Biomass Equations for Masson Pine Plantation in Guizhou Province Automatic Measurement Technology for Standing Tree Volume Based on Laser Scanner Simulation of Larix gmelinii tree volume growth based on random effect.