Figure 3.

The real relaxation modulus measurements ${\overline{G}}_i$ (red points) and three-parameter Maxwell models: sampling-instant-independent model $G_M\left(t,{\mathit{g}}^{\ast \widehat{\lambda }}\right)$ (green lines) and optimal models $G_M\left(t,{\mathit{g}}_N^{\widehat{\lambda }}\right)$ (blue lines) for $N$ measurements and additive random noises of normal distribution with zero mean value and standard deviation $\sigma =0.007 \mathrm{Pa}$: (a) $N=100$; (b) $N=\mathrm{10,000}$. The caret for $\widehat{\lambda }$ has been omitted in the legend description to simplify it.