Multicompare Tests of the Performance of Different Metaheuristics in EEG Dipole Source Localization

Figure 3

MSE of 𝜽 in two-dipole localization using SA, GA, PSO, and DE with different initialization parameters, 2500 evaluations of the objective function and SNR=0 dB. SA* correspond to the case of SA when 𝑇_𝑜=Δ𝐸/ln(𝛽⁻¹). AFM refers to the case when adaptive feasible mutation was used for GA. For the PSO algorithm, 𝑐₁=𝑐₂=2.83 was used in all cases. DE BC corresponds to the experiment using the generic strategy (DE/rand/1/bin) with Γ=0.5 and 𝜁=0.2. The central mark in each method corresponds to its median, the edges of the box are the 25th and 75th percentiles, the whiskers extensions are the most extreme data points, and “+” markers correspond to the outliers.

(a) Estimation of the location parameters of dipole 1

(b) Estimation of the location parameters of dipole 2