Construction of tree growth model based cusp catastrophe theory model

摘要

) as the true value. The internal and external accord precision of “V-H-D” model established were conducted by using the improved differential evolution algorithm and edge species model and then the difference between model calculation value and instrument measuring. the results showed that: The overall relative error (RS) of the model is in the range of [0.001, 0.05], the average relative error (E) is in the range of [-0.11, 0.02], the overall prediction accuracy (P) is greater than 80%. The results show that the model is consistent with the northern China 6 single species tree volume. Meanwhile, this study provides a theoretical and practical basis for the study of tree volume and various species of spatial competition.