Fig. 2

Diagnostics of the component models: a autocorrelation function (ACF) of the residual errors of the f[2^− 3 t] component model, b cumulative periodogram of the residual errors of the f[2^− 3 t] component model, c ACF of the residual errors of the g[2^− 3 t] component model, and d cumulative periodogram of the residual errors of the g[2^− 3 t] component model