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

Figure 6

Plots of trained absolute errors between the trained outputs and the actual values by four models for the daily air quality index (AQI) of Xi’an.

(a) Trained error by LDIW-PSO-RBF

(b) Trained error by NDIW-PSO-RBF

(c) Trained error by GLbestIW-PSO-RBF

(d) Trained error by EDIW-PSO-RBF