(a) The power spectrums of the dynamic system with

(b) The power spectrums of the dynamic system with

(c) The power spectrums of the dynamic system with

(d) The power spectrums of the dynamic system with

Figure 9: The power spectrums of the dynamic system when , , , and . (The red color stands for the power spectrum of ; the yellow color stands for the power spectrum of ; the blue color stands for the power spectrum of ; and the green color stands for the power spectrum of .)