“…Moreover, it has been shown that PSO outperforms the real-coded GA in terms of convergence speed (Donelli & Massa, 2005). Some recent works have compared different algorithms in inverse scattering (Rekanos, 2008;Semnani et al, 2009;Pastorino, 2007;Rocca et al, 2009;Chiu & Hsiao, 2011;Sun et al, 2010b;Li et al, 2011). In 2006, DDE was first proposed to deal with the shape reconstruction of a conducting cylinder under the frequency domain (Qing, 2006).…”