Figure 7.
Color-coded minimum coefficient of variation (RTmin) of layer 2 against multiplexing parameters. Each of layer 1 and layer 2 is intra-connected by inhibitory chemical synapses. (A) Shows the enhancement performances of the electrical multiplexing (κm,e, τm,e). Here, we observe that electrical multiplexing cannot optimize SISR in layer 2, especially at stronger multiplexing. (B) Shows the enhancement performances of the inhibitory chemical multiplexing (κm,c, τm,c). In this case, the enhancement of SISR is even worse than in (A), especially at intermediate multiplexing strengths and short time delays. (C) Shows the enhancement performances of the excitatory chemical multiplexing (κm,c, τm,c). Here, an enhancement is possible. An optimized SISR (RTmin ≈ 0.03) emerging at strong excitatory chemical synapses (κm,c ≥ 0.8) with short time delays (τm,c ≤ 1.2). Parameters of layer 1: N = 25, n1,c = 8, β = 0.75, ε = 0.0005, α = 0.5, κ1c = 0.1, τ1,c = 25.0. Parameters of layer 2: N = 25, nl,c = 8, β = 0.75, ε = 0.0005, α = 0.5, κl,c = 1.0, τl,c = 1.0.