Figure shows the averaged recovered impedances and DRTs obtained using hyper method with 𝜆 0,opt and the 𝜆 = 𝜆 0 from the GCV and mGCV methods. The DRTs peaks were better identified by hyper-𝜆 method relative to RR with lower normalized impedance mean square errors (i.e., MSE norm,𝑍 exp , MSE norm,𝑍 exact , and MSE 𝛾 norm,exact , see Tables and). and.