/ n$: (a) the mean absolute error and (b) standard deviation. Plots are the average values over 000 experiments.[]{data-label="fig:H_Gauss_H0.0"}](H_Gauss_H0.0.eps){height="0.0cm"}  ![Results of estimation of $\hat{H}$ against $J_{\mrm{true}}$ when $H_{\mrm{true}} = 0.0$ and $\alpha = 0