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by jwmullally
1904 days ago
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Some general background on STDP for the thread: Biological neurons don't just emit constant 0...1 float values, they communicate using time sensitive bursts of voltage known as "spike trains". Spiking Neural Networks (SNN) are a closer aproximation of natural networks than typical ML ANNs. [0] gives a quick overview. Spike-Timing-Dependant-Plasticity is a local learning rule experimentally observed in biological neurons. It's a form of Hebbian learning, aka "Neurons that fire together wire together." Summary from [1]. The top graph gives a clear picture of how the rule works. > With STDP, repeated presynaptic spike arrival a few milliseconds before postsynaptic action potentials leads in many synapse types to Long-Term Potentiation (LTP) of the synapses, whereas repeated spike arrival after postsynaptic spikes leads to Long-Term Depression (LTD) of the same synapse. --- [0]: https://towardsdatascience.com/deep-learning-versus-biologic... [1]: http://www.scholarpedia.org/article/Spike-timing_dependent_p... |
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