//Constructors
/// <summary>
/// Creates an initialized instance
/// </summary>
/// <param name="role">Role of the neuron (excitatory or inhibitory)</param>
/// <param name="refractoryPeriods">Number of after spike computation cycles while an input stimuli is ignored (ms)</param>
/// <param name="solverMethod">ODE numerical solver method</param>
/// <param name="solverCompSteps">ODE numerical solver computation steps of the time step</param>
public AutoIzhikevichIFSettings(NeuronCommon.NeuronRole role,
int refractoryPeriods,
ODENumSolver.Method solverMethod,
int solverCompSteps
)
{
Role = role;
RefractoryPeriods = refractoryPeriods;
SolverMethod = solverMethod;
SolverCompSteps = solverCompSteps;
return;
}
//Constructor
/// <summary>
/// Creates an initialized instance
/// </summary>
/// <param name="placement">Home pool identificator and neuron placement within the pool.</param>
/// <param name="role">Neuron's role (Excitatory/Inhibitory).</param>
/// <param name="activation">Instantiated activation function.</param>
/// <param name="signalingRestriction">Output signaling restriction. Spiking activation causes output signal always restricted to SpikingOnly.</param>
/// <param name="predictorsCfg">Enabled/Disabled predictors for the neuron.</param>
/// <param name="bias">Constant bias to be applied.</param>
/// <param name="analogFiringThreshold">A number between 0 and 1 (LT1). Every time the new activation value is higher than the previous activation value by at least the threshold, it is evaluated as a firing event. Ignored in case of spiking activation.</param>
/// <param name="retainmentStrength">Strength of the analog neuron's retainment property. Ignored in case of spiking activation.</param>
public HiddenNeuron(NeuronPlacement placement,
NeuronCommon.NeuronRole role,
IActivationFunction activation,
NeuronCommon.NeuronSignalingRestrictionType signalingRestriction,
HiddenNeuronPredictorsSettings predictorsCfg,
double bias = 0,
double analogFiringThreshold = PoolSettings.NeuronGroupSettings.DefaultAnalogFiringThreshold,
double retainmentStrength = 0
)
{
Placement = placement;
Statistics = new NeuronStatistics();
if (role == NeuronCommon.NeuronRole.Input)
{
throw new ArgumentException("Role of the hidden neuron can not be Input.", "role");
}
Role = role;
Bias = bias;
PredictorsCfg = predictorsCfg;
//Activation specific
_activation = activation;
if (activation.TypeOfActivation == ActivationType.Spiking)
{
//Spiking
SignalingRestriction = NeuronCommon.NeuronSignalingRestrictionType.SpikingOnly;
_analogFiringThreshold = 0;
_retainmentStrength = 0;
}
else
{
//Analog
SignalingRestriction = signalingRestriction;
_analogFiringThreshold = analogFiringThreshold;
_retainmentStrength = retainmentStrength;
}
_predictors = predictorsCfg != null ? new HiddenNeuronPredictors(predictorsCfg) : null;
Reset(false);
return;
}
//Methods
/// <summary>
/// Returns appropriate dynamics settings
/// </summary>
/// <param name="sourceNeuronType">Type of the source neuron</param>
/// <param name="sourceNeuronRole">Role of the source neuron</param>
/// <param name="targetNeuronType">Type of the target neuron</param>
/// <param name="targetNeuronRole">Role of the target neuron</param>
public DynamicsSettings GetDynamicsSettings(ActivationType sourceNeuronType,
NeuronCommon.NeuronRole sourceNeuronRole,
ActivationType targetNeuronType,
NeuronCommon.NeuronRole targetNeuronRole
)
{
if (sourceNeuronType == ActivationType.Spiking &&
targetNeuronType == ActivationType.Spiking &&
sourceNeuronRole == NeuronCommon.NeuronRole.Excitatory &&
targetNeuronRole == NeuronCommon.NeuronRole.Excitatory
)
{
return(S2SSynapseE2EDynamicsCfg);
}
else if (sourceNeuronType == ActivationType.Spiking &&
targetNeuronType == ActivationType.Spiking &&
sourceNeuronRole == NeuronCommon.NeuronRole.Excitatory &&
targetNeuronRole == NeuronCommon.NeuronRole.Inhibitory
)
{
return(S2SSynapseE2IDynamicsCfg);
}
else if (sourceNeuronType == ActivationType.Spiking &&
targetNeuronType == ActivationType.Spiking &&
sourceNeuronRole == NeuronCommon.NeuronRole.Inhibitory &&
targetNeuronRole == NeuronCommon.NeuronRole.Excitatory
)
{
return(S2SSynapseI2EDynamicsCfg);
}
else if (sourceNeuronType == ActivationType.Spiking &&
targetNeuronType == ActivationType.Spiking &&
sourceNeuronRole == NeuronCommon.NeuronRole.Inhibitory &&
targetNeuronRole == NeuronCommon.NeuronRole.Inhibitory
)
{
return(S2SSynapseI2IDynamicsCfg);
}
else if (sourceNeuronType == ActivationType.Analog &&
targetNeuronType == ActivationType.Spiking &&
sourceNeuronRole == NeuronCommon.NeuronRole.Excitatory &&
targetNeuronRole == NeuronCommon.NeuronRole.Excitatory
)
{
return(A2SSynapseE2EDynamicsCfg);
}
else if (sourceNeuronType == ActivationType.Analog &&
targetNeuronType == ActivationType.Spiking &&
sourceNeuronRole == NeuronCommon.NeuronRole.Excitatory &&
targetNeuronRole == NeuronCommon.NeuronRole.Inhibitory
)
{
return(A2SSynapseE2IDynamicsCfg);
}
else if (sourceNeuronType == ActivationType.Analog &&
targetNeuronType == ActivationType.Spiking &&
sourceNeuronRole == NeuronCommon.NeuronRole.Inhibitory &&
targetNeuronRole == NeuronCommon.NeuronRole.Excitatory
)
{
return(A2SSynapseI2EDynamicsCfg);
}
else if (sourceNeuronType == ActivationType.Analog &&
targetNeuronType == ActivationType.Spiking &&
sourceNeuronRole == NeuronCommon.NeuronRole.Inhibitory &&
targetNeuronRole == NeuronCommon.NeuronRole.Inhibitory
)
{
return(A2SSynapseI2IDynamicsCfg);
}
else if (sourceNeuronType == ActivationType.Spiking &&
targetNeuronType == ActivationType.Analog &&
sourceNeuronRole == NeuronCommon.NeuronRole.Excitatory &&
targetNeuronRole == NeuronCommon.NeuronRole.Excitatory
)
{
return(S2ASynapseE2EDynamicsCfg);
}
else if (sourceNeuronType == ActivationType.Spiking &&
targetNeuronType == ActivationType.Analog &&
sourceNeuronRole == NeuronCommon.NeuronRole.Excitatory &&
targetNeuronRole == NeuronCommon.NeuronRole.Inhibitory
)
{
return(S2ASynapseE2IDynamicsCfg);
}
else if (sourceNeuronType == ActivationType.Spiking &&
targetNeuronType == ActivationType.Analog &&
sourceNeuronRole == NeuronCommon.NeuronRole.Inhibitory &&
targetNeuronRole == NeuronCommon.NeuronRole.Excitatory
)
{
return(S2ASynapseI2EDynamicsCfg);
}
else if (sourceNeuronType == ActivationType.Spiking &&
targetNeuronType == ActivationType.Analog &&
sourceNeuronRole == NeuronCommon.NeuronRole.Inhibitory &&
targetNeuronRole == NeuronCommon.NeuronRole.Inhibitory
)
{
return(S2ASynapseI2IDynamicsCfg);
}
else if (sourceNeuronType == ActivationType.Analog &&
targetNeuronType == ActivationType.Analog &&
sourceNeuronRole == NeuronCommon.NeuronRole.Excitatory &&
targetNeuronRole == NeuronCommon.NeuronRole.Excitatory
)
{
return(A2ASynapseE2EDynamicsCfg);
}
else if (sourceNeuronType == ActivationType.Analog &&
targetNeuronType == ActivationType.Analog &&
sourceNeuronRole == NeuronCommon.NeuronRole.Excitatory &&
targetNeuronRole == NeuronCommon.NeuronRole.Inhibitory
)
{
return(A2ASynapseE2IDynamicsCfg);
}
else if (sourceNeuronType == ActivationType.Analog &&
targetNeuronType == ActivationType.Analog &&
sourceNeuronRole == NeuronCommon.NeuronRole.Inhibitory &&
targetNeuronRole == NeuronCommon.NeuronRole.Excitatory
)
{
return(A2ASynapseI2EDynamicsCfg);
}
else if (sourceNeuronType == ActivationType.Analog &&
targetNeuronType == ActivationType.Analog &&
sourceNeuronRole == NeuronCommon.NeuronRole.Inhibitory &&
targetNeuronRole == NeuronCommon.NeuronRole.Inhibitory
)
{
return(A2ASynapseI2IDynamicsCfg);
}
return(null);
}
