Sampled time series for membrane potentials on different nodes are calculated, and the center of area exposed to electromagnetic field is selected as (x
0, y
0) = (60, 60), noise area r ≤ 40, noise intensity is set as D = 9, k
0 = 0.1, k
1 = 0.5, k
2 = 1.6, α = 1, β = 2.