// function handles exact spike times
void
nest::iaf_psc_alpha_presc::handle( SpikeEvent& e )
{
assert( e.get_delay() > 0 );
const long_t Tdeliver = e.get_rel_delivery_steps(
nest::kernel().simulation_manager.get_slice_origin() );
const double_t spike_weight =
V_.PSCInitialValue_ * e.get_weight() * e.get_multiplicity();
const double_t dt = e.get_offset();
// Building the new matrix for the offset of the spike
// NOTE: We do not use get matrix, but compute only those
// components we actually need for spike registration
// needed in any case
const double_t ps_e_TauSyn = numerics::expm1( -dt / P_.tau_syn_ );
const double_t ps_e_Tau = numerics::expm1( -dt / P_.tau_m_ );
const double_t ps_P31 = V_.gamma_sq_ * ps_e_Tau - V_.gamma_sq_ * ps_e_TauSyn
- dt * V_.gamma_ * ps_e_TauSyn - dt * V_.gamma_;
B_.spike_y1_.add_value( Tdeliver, spike_weight * ps_e_TauSyn + spike_weight );
B_.spike_y2_.add_value(
Tdeliver, spike_weight * dt * ps_e_TauSyn + spike_weight * dt );
B_.spike_y3_.add_value( Tdeliver, spike_weight * ps_P31 );
}
void pif_psc_delta_canon_cvv::handle(SpikeEvent & e)
{
assert(e.get_delay() > 0);
/* We need to compute the absolute time stamp of the delivery time
of the spike, since spikes might spend longer than min_delay_
in the queue. The time is computed according to Time Memo, Rule 3.
*/
const long_t Tdeliver = e.get_stamp().get_steps() + e.get_delay() - 1;
B_.events_.add_spike(e.get_rel_delivery_steps(network()->get_slice_origin()),
Tdeliver, e.get_offset(), e.get_weight() * e.get_multiplicity());
}
// function handles exact spike times
void
parrot_neuron_ps::handle( SpikeEvent& e )
{
// Repeat only spikes incoming on port 0, port 1 will be ignored
if ( 0 == e.get_rport() )
{
assert( e.get_delay() > 0 );
// We need to compute the absolute time stamp of the delivery time
// of the spike, since spikes might spend longer than min_delay_
// in the queue. The time is computed according to Time Memo, Rule 3.
const long_t Tdeliver = e.get_stamp().get_steps() + e.get_delay() - 1;
// parrot ignores weight of incoming connection, store multiplicity
B_.events_.add_spike(
e.get_rel_delivery_steps(
nest::kernel().simulation_manager.get_slice_origin() ),
Tdeliver,
e.get_offset(),
static_cast< double_t >( e.get_multiplicity() ) );
}
}
