neurali:sinapsi_predefinite_annarchy
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neurali:sinapsi_predefinite_annarchy [2016/07/07 15:36] – [Sinapsi predefinite ANNarchy] profpro | neurali:sinapsi_predefinite_annarchy [2020/06/08 22:20] (current) – external edit 127.0.0.1 | ||
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+ | < [[neurali: | ||
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+ | =====Sinapsi predefinite ANNarchy====== | ||
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+ | http:// | ||
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+ | [[neurali: | ||
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+ | Sono di tipo rate-coded: | ||
+ | * DefaultSpikingSynapse | ||
+ | * Hebb | ||
+ | * Oja | ||
+ | * IBCM | ||
+ | |||
+ | ====Default==== | ||
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+ | http:// | ||
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+ | > By default, the synapse only ensures linear synaptic transmission: | ||
+ | > | ||
+ | > * For rate-coded populations: | ||
+ | > * For spiking populations: | ||
+ | =====STP===== | ||
+ | sinapsi di tipo **spinking model** con potenziamento e depressione a breve termine, implementata usando il modelllo di Tsodyks, Markram et al. | ||
+ | |||
+ | ^ par ^ valore ^ descrizione ^ | ||
+ | | tau_rec | 100.0 | depression time constant (ms) | | ||
+ | | tau_facil | 0.01 | facilitation time constant (ms) | | ||
+ | | U | 0.5 | use parameter | | ||
+ | |||
+ | time constant of the post-synaptic current, nel modello del neurone... | ||
+ | |||
+ | |||
+ | ^ var ^ descrizione ^ equazione ^ | ||
+ | | x | recovery variable | dx/dt = (1 - x)/tau_rec | | ||
+ | | u | facilitation variable | du/dt = (U - u)/ | ||
+ | |||
+ | ^ vocabolario ^ valore ^ | ||
+ | | pre_spike | g_target += w * u * x | | ||
+ | | | x *= (1 - u) | | ||
+ | | | u += U * (1 - u)| | ||
+ | |||
+ | =====STDP ===== | ||
+ | |||
+ | Spike-Timing Dependent Plasticity | ||
+ | |||
+ | ^ par ^ valore ^ descrizione ^ | ||
+ | | tau_plus | 20.0 | time constant of the pre-synaptic trace (ms) | | ||
+ | | tau_minus | 20.0 | time constant of the pre-synaptic trace (ms) | | ||
+ | | A_plus | 0.01 | increase of the pre-synaptic trace after a spike | | ||
+ | | A_minus | 0.01 | decrease of the post-synaptic trace after a spike | | ||
+ | | w_min | 0.0 | minimal value of the weight w | | ||
+ | | w_max | 1.0 | maximal value of the weight w | | ||
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+ | ^ var ^ descrizione ^ equazione ^ | ||
+ | | x | pre-synaptic trace | tau_plus | ||
+ | | y | post-synaptic trace | tau_minus * dy/dt = -y | | ||
+ | |||
+ | ^ Vocabolario eventi ^ valore ^ | ||
+ | | pre_spike | g_target += w | | ||
+ | | | x += A_plus * w_max | | ||
+ | | | w = clip(w + y, w_min , w_max) | | ||
+ | | post_spike | y -= A_minus * w_max | | ||
+ | | | w = clip(w + x, w_min , w_max) | | ||
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neurali/sinapsi_predefinite_annarchy.txt · Last modified: 2020/06/08 22:20 by 127.0.0.1