In the classical formulation of integrate and fire models, the spike occurs simultaneously with a reset of the membrane potential to some constant value V reset, called the "reset potential".
A reset potential of +2 V switched the device from low resistive state (LRS) to high resistive state (HRS), while an opposite switching trend occurred at +4 V in the following programming cycle.
The integrate-and-fire-type neuron models that are frequently used in computational neuroscience [12 15] generate a spike in neuron j any time a voltage V j ( t ) crosses a fixed threshold ψ and subsequently reset the voltage to a reset potential.
If V depolarizes above a threshold potential, Vth = −54 mV, a spike is instantaneously generated and the membrane potential is set to the reset potential, Vreset = −80 mV.
Neurons in the network are described by leaky integrate-and-fire (ir) neurons with resting potential VL = −70 mV, firing threshold Vthr = −50 mV, reset potential Vreset = −55 mV, and refractory period τrp = 2 ms for excitatory cells and τrp = 1 ms for inhibitory cells.
While a single light/dark cycle is often sufficient to cause large phase shifts and near-complete entrainment [ 19, 20] a single daily temperature gradient has more limited phase-resetting potential.
The terrain and all initial values are reset, if the reset potential exceeds the reset threshold.
antaRNA uses three termination criteria to stop the ACO: maximal number of generated solutions, a termination potential and a reset potential.
The resulting four parameters are bifurcation parameters and are directly proportional to the conductance a, the time constant τ w the spike triggered adaptation b, and the reset potential V r.
The reset potential is increased, if the structural distance of a current solution is not zero but the GC quality is within a margin of the momentarily best solution, i.e. d GC ≤ 1.5 * d GC bestSoFar.
First, the reset potentials were closer to the steady state mean Vm than the natural fluctuations of Vm around the mean, so the decay from reset back to the mean was faster than τeff.
