Research Article
A Prediction Model of Forest Preliminary Precision Fertilization Based on Improved GRA-PSO-BP Neural Network
Table 7
Correlation and error value of three models for predicting phosphorus fertilizer.
| Fertilization model | Mean square error | Maximum absolute error | Minimum absolute error | Mean absolute error | Correlation |
| Traditional BP neural network | 2.1253 | 3.54 | 0.097 | 1.732 | 0.9986 | BP neural network optimized by PSO algorithm | 0.1590 | 0.36 | 0.023 | 0.121 | 0.9999 | BP neural network optimized by GRA-PSO algorithm | 0.1699 | 0.3 | 0.002 | 0.119 | 0.9999 |
|
|