/// <summary>
/// Remove all connections (to and from this neuron).
/// </summary>
public void IsolateNeuron()
{
DisconnectToAllNeurons();
for (int i = _sourceSynapses.Count - 1; i > -1; i--)
{
Synapse s = _sourceSynapses[i];
s.SourceNeuron.DisconnectToNeuron(s);
}
}
/// <summary>
/// Remove a connection from this neuron forward to another neuron.
/// </summary>
/// <param name="s">The synapse feeding this neuron.</param>
public void DisconnectToNeuron(Synapse s)
{
_targetSynapses.Remove(s);
s.TargetNeuron._sourceSynapses.Remove(s);
if (TargetSynapseRemoved != null)
{
TargetSynapseRemoved(this, new SynapseEventArgs(s));
}
}
/// <summary>
/// Connect this neuron forward to another (specified) neuron.
/// </summary>
/// <param name="target">The target neuron.</param>
/// <param name="weight">The weight of the synapse.</param>
/// <returns>The new connection synapse.</returns>
public Synapse ConnectToNeuron(Neuron target, double weight)
{
Synapse s = new Synapse(_node.BuildSibling(), this, target, weight);
_targetSynapses.Add(s);
target._sourceSynapses.Add(s);
if (TargetSynapseAdded != null)
{
TargetSynapseAdded(this, new SynapseEventArgs(s));
}
return(s);
}
/// <summary>
/// Evaluate the gradient for the current pattern.
/// </summary>
protected virtual void EvaluateGradient()
{
if (_targetSynapses.Count == 0) //Output Neuron
{
_cDelta = _config.ActivateDerivative(_cActivity, _cOutput) * (_cTrain - _cOutput);
}
else //Input or Hidden Neuron
{
_cDelta = 0;
for (int i = 0; i < _targetSynapses.Count; i++)
{
Synapse s = _targetSynapses[i];
_cDelta += s.CalculateCurrentFlowDifferential();
}
_cDelta *= _config.ActivateDerivative(_cActivity, _cOutput);
}
}
/// <summary>
/// Remove all connections from this neuron forward to another (specified) neuron.
/// </summary>
/// <param name="source">The neuron feeding this neuron.</param>
public void DisconnectToNeuron(Neuron source)
{
for (int i = 0; i < _targetSynapses.Count; i++)
{
Synapse s = _targetSynapses[i];
if (s.TargetNeuron == source)
{
_targetSynapses.Remove(s);
s.TargetNeuron._sourceSynapses.Remove(s);
if (TargetSynapseRemoved != null)
{
TargetSynapseRemoved(this, new SynapseEventArgs(s));
}
i--;
}
}
}
/// <summary>
/// Propagate the neuron.
/// </summary>
/// <remarks>
/// To publish the propagated data, you need to call PublishPropagation afterwards.
/// </remarks>
public virtual void Propagate()
{
if (_sourceSynapses.Count > 0)
{
double old = _cActivity;
_cActivity = 0;
if (_config.BiasNeuronEnable.Value && _sourceSynapses.Count != 0)
{
_cActivity = _config.BiasNeuronOutput.Value * _cBiasNeuronWeight;
}
for (int i = 0; i < _sourceSynapses.Count; i++)
{
Synapse s = _sourceSynapses[i];
_cActivity += s.CalculateCurrentFlow();
}
if (!_config.QuietModeEnable.Value && _cActivity != old && ActivityChanged != null)
{
ActivityChanged(this, new ValueChangedEventArgs(_cActivity, old));
}
}
}
/// <summary>
/// Remove a connection from this neuron forward to another neuron.
/// </summary>
/// <param name="s">The synapse feeding this neuron.</param>
public void DisconnectToNeuron(Synapse s)
{
_targetSynapses.Remove(s);
s.TargetNeuron._sourceSynapses.Remove(s);
if(TargetSynapseRemoved != null)
TargetSynapseRemoved(this,new SynapseEventArgs(s));
}
/// <summary>
/// Connect this neuron forward to another (specified) neuron.
/// </summary>
/// <param name="target">The target neuron.</param>
/// <param name="weight">The weight of the synapse.</param>
/// <returns>The new connection synapse.</returns>
public Synapse ConnectToNeuron(Neuron target, double weight)
{
Synapse s = new Synapse(_node.BuildSibling(), this, target, weight);
_targetSynapses.Add(s);
target._sourceSynapses.Add(s);
if(TargetSynapseAdded != null)
TargetSynapseAdded(this,new SynapseEventArgs(s));
return s;
}
/// <summary>
/// Instanciate new event arguments.
/// </summary>
/// <param name="synapse">The refering synapse.</param>
public SynapseEventArgs(Synapse synapse)
{
this.synapse = synapse;
}
/// <summary>
/// Instanciate new event arguments.
/// </summary>
/// <param name="synapse">The refering synapse.</param>
public SynapseEventArgs(Synapse synapse)
{
this.synapse = synapse;
}
