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

Figure 4

The best global fitness value for the AQI of Xi’an. Blue short dash line shows the best global fitness value by the improved EDIW-PSO-RBF model; red dashdotted line shows the best global fitness value by the GLbestIW-PSO-RBF model; green solid line shows the best global fitness value by the LDIW-PSO-RBF model; black solid line shows the best global fitness value by the NDIW-PSO-RBF model.