Table 1.
Typical parameter values used during the simulations.
| Equation (1.1) | Time constant (excitatory cells) | τ = 2.5 (simulation time-steps) |
| Time constant (inhibitory cells) | τ = 5 (simulation time-steps) | |
| Total input rescaling factor | k1 = 0.01 | |
| Noise amplitude | ||
| during learning: | k2 = 5 · | |
| during testing: | k2 = 50 · | |
| Equation (1.2) | Global inhibition strength | |
| during learning: | kG = 0.75 | |
| during testing: | kG = 0.60 | |
| Equation (2) | Spiking threshold | thresh = 0.18 |
| Adaptation strength | α = 7.0 | |
| Equation (3.1) | Adaptation time constant | τADAPT = 10 (time steps) |
| Equation (3.2) | Rate-estimate time constant | τFavg = 30 (time steps) |
| Equation (3.3) | Global inhibition time constant | τGLOB = 12 (time steps) |
| Equation (4) | Postsynaptic membrane potential thresholds: | |
| θ+ = 0.15 | ||
| θ− = 0.14 | ||
| Presynaptic output activity required for LTP: | ||
| θpre = 0.05 | ||
| Learning rate | Δ = 0.0008 | |