Table 4. Input variables to the Improved Equilibrium Optimizer (IEO) algorithm.

Parameters	SDM	DDM
Dimension of problem d	3	5
Initial population size, Npini	50	80
Maximum no. of fitness evaluation, NFEmax	50	60
The range of parameters, [Xmin, Xmax]	a = [0.1, 2.0]	a1 = [0.1, 2.0]
		a2 = [0.1, 2.0]
	Rs = [0.0001, 1] ohm	Io1 = [${10}^{-12}$, ${10}^{-06}]amp$
	Rp = [40; 200] ohm	Rs = [0.0001, 1] ohm
		Rp = [40, 200] ohm