internal QSAI(IAdjustableItem item)
{
Contract.Requires(item != null);
this.item = item;
var limited = item as ILimitedAdjustableItem;
double max;
if (limited != null)
{
min = limited.Min;
max = limited.Max;
}
else
{
min = -1.0;
max = 1.0;
}
size = max - min;
}
public QuantumStatedAdjustableItem(IAdjustableItem item)
{
Contract.Requires(item != null);
this.item = item;
var limited = item as IRangedAdjustableItem;
double max;
if (limited != null)
{
min = limited.Range.MinValue;
max = limited.Range.MaxValue;
}
else
{
min = -1.0;
max = 1.0;
}
size = max - min;
}
internal QSAItem(IAdjustableItem item)
{
Contract.Requires(item != null);
this.item = item;
}
private IRuleParameters GetCurrentParameters(IAdjustableItem item)
{
var pars = item as IRuleParameters;
return pars != null ? pars : DefaultParameters;
}
private void Initialize(IAdjustableItem item)
{
var pars = GetCurrentParameters(item);
item.Adjustment = (pars.WeightInititlizationNoise * RandomGenerator.Random.NextDouble()) * 2.0 - pars.WeightInititlizationNoise;
}
private void Adjust(IAdjustableItem item, double error, double input, DeltaContext context)
{
var pars = GetCurrentParameters(item);
double delta = pars.StepSize * error * input;
if (pars.Momentum != 0.0)
{
if (context.Delta == null)
{
context.Delta = delta;
}
else
{
context.Delta = delta = (pars.Momentum * context.Delta.Value) + ((1.0 - pars.Momentum) * delta);
}
}
item.Adjustment += delta;
}
