*5.4. The Effect of Noise Intensity*

Further simulations are conducted to discuss how noise intensity affects the trajectory of the evolutionary game model. Figure 7 shows the results. It can be observed that the uncertainty will bring random disturbance into the evolution process and then affect the evolution process. In addition, it also can be seen that the higher the noise intensity is, the more fluctuation exists in the evolutionary trajectories. This means the uncertainty can affect the strategy choice of the government agencies, waste recyclers, and waste producers.

**Figure 7.** Multi-agent dynamic evolutionary trajectories under different noise intensity. (**a**) The probability when government agency conducting positive supervision. (**b**) The probability when waste recyclers implement construction waste recycling. (**c**) The probability when waste producers implement construction waste recycling. When *Ss* = 10, *Sj* = 10, *F*<sup>1</sup> = 15, *F*<sup>2</sup> = 20, *G* = 30, *G*<sup>1</sup> = 15, *Eg* = 8, *Cg* = 5, *Pj* = 15, Δ*Cj* = 8, *C* = 30, *λ* = 0.2, *R* = 45, *C*<sup>0</sup> = 6, *C*<sup>1</sup> = 5, *η* = 0.8.
