Forecasting stand diameter distribution based on artificial neural network.

A stand diameter distribution model was described by using artificial neural network modeling technology, in a Masson pine forest. By training and optimization, an ideal model was developed, with a model structure of 3∶6∶6∶1, a training error of 0.000 281 and a 98% accurate fit. For the 82 training plots, the accuracy of accumulated frequency fitting ranged from 95% to 100%, with a mean of 98%. The accuracy of frequency fitting ranged from 75% to 96%, with a mean of 87%. For the 18 test plots, the accuracy of accumulated frequency prediction ranged from 97% to 99%, with a mean of 98%. The accuracy of frequency prediction was between 76% and 96%, with a mean of 88%. Due to its high fitting accuracy and strong prediction ability, the model created by us can be used to predict stand diameter distributions in Masson pine forests, aged 10 to 30 years. The results indicate that an artificial neural network is an effective prediction technology for stand diameter distribution. 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