/// <summary>
/// Setup the network logic, read parameters from the network.
/// </summary>
/// <param name="network">The network that this logic class belongs to.</param>
public override void Init(BasicNetwork network)
{
base.Init(network);
// hold references to parts of the network we will need later
this.thermalLayer = this.Network.GetLayer(BasicNetwork.TAG_INPUT);
this.thermalSynapse = this.Network.Structure.FindSynapse(this.thermalLayer, this.thermalLayer, true);
this.currentState = new BiPolarNeuralData(this.thermalLayer.NeuronCount);
}
/// <summary>
/// Setup the network logic, read parameters from the network.
/// </summary>
/// <param name="network">The network that this logic class belongs to.</param>
public override void Init(BasicNetwork network)
{
base.Init(network);
this.layerF1 = this.Network.GetLayer(ART1Pattern.TAG_F1);
this.layerF2 = this.Network.GetLayer(ART1Pattern.TAG_F2);
this.inhibitF2 = new bool[this.layerF2.NeuronCount];
this.synapseF1toF2 = this.Network.Structure.FindSynapse(this.layerF1, this.layerF2, true);
this.synapseF2toF1 = this.Network.Structure.FindSynapse(this.layerF2, this.layerF1, true);
this.outputF1 = new BiPolarNeuralData(this.layerF1.NeuronCount);
this.outputF2 = new BiPolarNeuralData(this.layerF2.NeuronCount);
this.a1 = this.Network.GetPropertyDouble(ARTLogic.PROPERTY_A1);
this.b1 = this.Network.GetPropertyDouble(ARTLogic.PROPERTY_B1);
this.c1 = this.Network.GetPropertyDouble(ARTLogic.PROPERTY_C1);
this.d1 = this.Network.GetPropertyDouble(ARTLogic.PROPERTY_D1);
this.l = this.Network.GetPropertyDouble(ARTLogic.PROPERTY_L);
this.vigilance = this.Network.GetPropertyDouble(ARTLogic.PROPERTY_VIGILANCE);
this.noWinner = this.layerF2.NeuronCount;
Reset();
}
/// <summary>
/// Compute the output for the BasicNetwork class.
/// </summary>
/// <param name="input">The input to the network.</param>
/// <param name="useHolder">The NeuralOutputHolder to use.</param>
/// <returns>The output from the network.</returns>
public override INeuralData Compute(INeuralData input, NeuralOutputHolder useHolder)
{
if (!(input is BiPolarNeuralData))
{
String str = "Input to ART1 logic network must be BiPolarNeuralData.";
#if logging
if (logger.IsErrorEnabled)
{
logger.Error(str);
}
#endif
throw new NeuralNetworkError(str);
}
BiPolarNeuralData output = new BiPolarNeuralData(this.layerF1.NeuronCount);
Compute((BiPolarNeuralData)input, output);
return output;
}
/// <summary>
/// Set the input to the neural network.
/// </summary>
/// <param name="input">The input.</param>
private void SetInput(BiPolarNeuralData input)
{
double activation;
for (int i = 0; i < this.layerF1.NeuronCount; i++)
{
activation = (input.GetBoolean(i) ? 1 : 0)
/ (1 + this.a1 * ((input.GetBoolean(i) ? 1 : 0) + this.b1) + this.c1);
this.outputF1.SetBoolean(i, (activation > 0));
}
}
/// <summary>
/// Get the magnitude of the specified input.
/// </summary>
/// <param name="input">The input to calculate the magnitude for.</param>
/// <returns>The magnitude of the specified pattern.</returns>
public double Magnitude(BiPolarNeuralData input)
{
double result;
result = 0;
for (int i = 0; i < this.layerF1.NeuronCount; i++)
{
result += input.GetBoolean(i) ? 1 : 0;
}
return result;
}
/// <summary>
/// Copy the output from the network to another object.
/// </summary>
/// <param name="output">The target object for the output from the network.</param>
private void GetOutput(BiPolarNeuralData output)
{
for (int i = 0; i < this.layerF2.NeuronCount; i++)
{
output.SetBoolean(i, this.outputF2.GetBoolean(i));
}
}
/// <summary>
/// Compute the output from the F1 layer.
/// </summary>
/// <param name="input">The input to the F1 layer.</param>
private void ComputeF1(BiPolarNeuralData input)
{
double sum, activation;
for (int i = 0; i < this.layerF1.NeuronCount; i++)
{
sum = this.synapseF1toF2.WeightMatrix[i, this.winner]
* (this.outputF2.GetBoolean(this.winner) ? 1 : 0);
activation = ((input.GetBoolean(i) ? 1 : 0) + this.d1 * sum - this.b1)
/ (1 + this.a1
* ((input.GetBoolean(i) ? 1 : 0) + this.d1 * sum) + this.c1);
this.outputF1.SetBoolean(i, activation > 0);
}
}
/// <summary>
/// Compute the output from the ART1 network. This can be called directly
/// or used by the BasicNetwork class. Both input and output should be
/// bipolar numbers.
/// </summary>
/// <param name="input">The input to the network.</param>
/// <param name="output">The output from the network.</param>
public void Compute(BiPolarNeuralData input,
BiPolarNeuralData output)
{
int i;
bool resonance, exhausted;
double magnitudeInput1, magnitudeInput2;
for (i = 0; i < this.layerF2.NeuronCount; i++)
{
this.inhibitF2[i] = false;
}
resonance = false;
exhausted = false;
do
{
SetInput(input);
ComputeF2();
GetOutput(output);
if (this.winner != this.noWinner)
{
ComputeF1(input);
magnitudeInput1 = Magnitude(input);
magnitudeInput2 = Magnitude(this.outputF1);
if ((magnitudeInput2 / magnitudeInput1) < this.vigilance)
{
this.inhibitF2[this.winner] = true;
}
else
{
resonance = true;
}
}
else
{
exhausted = true;
}
} while (!(resonance || exhausted));
if (resonance)
{
AdjustWeights();
}
}