Fig. 4. Domains of normal distribution obtained with classical Variational Inference and the proposed technologically plausible method.

a Domain of normal distributions θ=(μ, σ) for the synaptic weights obtained after training our reference arrhythmia classification task with the classical variational inference method and mapping the software values to the conductance range achievable with filamentary memristors, Γ_memristor (blue) and phase-change memories, Γ_PCM (green). Weight values have been scaled to a conductance value (expressed in microsiemens) using a factor calculated to minimize the statistical distance between the normal distributions calculated by software and the available experimental ones (see Methods). b Domain of normal distributions obtained after training employing the new technologically calibrated method on filamentary memristors (blue) and phase-change memory experimental data (green).