Ordination of Dahurian Larch Forest in Mohe Forest Area Modeling Wood Density with Two-Level Linear Mixed Effects Models for Dahurian Larch The Characteristics of Energy in the Formative Process of Net Primary Productivity of Larch Artificial Forest Ecosystem Modeling Branch Diameter with Linear Mixed Effects for Dahurian Larch Inside Bark Diameter Prediction Models for Dahurian Larch Studies on Biological Productivity of Artificial Forests of Dahurian Larches Modeling Branch Length and Branch Angle with Linear Mixed Effects for Dahurian Larch Modeling Microibril Angle with Mixed Models for Dahurian Larch Whole Stand Growth Model for Natural Dahurian Larch Forests Based on BP ANN