def __create_recording_devices(self): """ Creates one recording device of each kind per population. Only devices which are given in ``sim_dict['rec_dev']`` are created. """ if self.Rank == 0: print('Creating recording devices.') if 'spike_detector' in self.sim_dict['rec_dev']: if self.Rank == 0: print(' Activating spike time recording.') #for pop in self.pops: ngpu.ActivateRecSpikeTimes(self.neurons, 1000)
fact = Wplus * math.exp(-Dt / tau_plus) w1 = w + fact * math.pow(1.0 - w / Wmax, mu_plus) if w1 > Wmax: w1 = Wmax else: fact = -alpha * Wplus * math.exp(Dt / tau_minus) w1 = w + fact * math.pow(w / Wmax, mu_minus) if w1 < 0.0: w1 = 0.0 return w1 # postsynaptic and presynaptic neurons neuron_post = ngpu.Create("parrot_neuron") ngpu.ActivateRecSpikeTimes(neuron_post, 20) neuron_pre = ngpu.Create("parrot_neuron") ngpu.ActivateRecSpikeTimes(neuron_pre, 20) #spike generators sg_post = ngpu.Create("spike_generator") sg_pre = ngpu.Create("spike_generator") # spike times spike_times_post = [1.0] spike_times_pre = [1.0] ngpu.SetStatus(sg_post, {"spike_times": spike_times_post}) ngpu.SetStatus(sg_pre, {"spike_times": spike_times_pre}) # connect spike generators to neurons syn_dict = {"weight": 1.0, "delay": 1.0}
n_neurons = 30 eps = 1.0e-6 # poisson generator parameters poiss_rate = 500.0 # poisson signal rate in Hz poiss_weight = 4.0 poiss_delay = 0.2 # poisson signal delay in ms # create poisson generator pg = ngpu.Create("poisson_generator") ngpu.SetStatus(pg, "rate", poiss_rate) # Create n_neurons neurons neuron = ngpu.Create("aeif_cond_beta", n_neurons) ngpu.ActivateSpikeCount(neuron) ngpu.ActivateRecSpikeTimes(neuron, 500) # Create n_neurons spike detectors sd = ngpu.Create("spike_detector", n_neurons) #connect poisson generator to all neurons pg_conn_dict = {"rule": "all_to_all"} pg_syn_dict = {"weight": poiss_weight, "delay": poiss_delay} ngpu.Connect(pg, neuron, pg_conn_dict, pg_syn_dict) #connect neurons to spike detectors sd_conn_dict = {"rule": "one_to_one"} sd_syn_dict = {"weight": 1.0, "delay": 0.1} ngpu.Connect(neuron, sd, sd_conn_dict, sd_syn_dict)