Radial Basis Function Neural Network Based on an Improved Exponential Decreasing Inertia Weight-Particle Swarm Optimization Algorithm for AQI Prediction

Figure 5

The trained output curve by four models for the daily air quality index (AQI) of Xi’an.

(a) Trained output by LDIW-PSO-RBF

(b) Trained output by NDIW-PSO-RBF

(c) Trained output by GLbestIW-PSO-RBF

(d) Trained output by EDIW-PSO-RBF