Figure 9.

The measurements ${\overline{G}}_i$ (red points) of the real relaxation modulus (43) of the material described by the BSW spectrum (42) and the fractional Maxwell optimal models: sampling points-independent $G_M\left(t,{\mathit{g}}^{\ast }\right)$ and empirical $G_M\left(t,{\mathit{g}}_N^{\ast }\right)$ for $N$ measurements and additive random normally distributed noises with standard deviation $=8 \left[\mathrm{P}\mathrm{a}\right]$ and zero mean value: (a) $N=100$; (b) $N=\mathrm{10,000}$.