/// <summary>
/// For the List of Arc Calculate the Conjunctive value (min)
/// </summary>
/// <param name="voArcs">List of Arc</param>
/// <returns>Calculated Lambda</returns>
public float CalculateCombinedConjunctive(BeliefNode voBeliefNode, Arcs voArcs)
{
float fValue = float.MaxValue;
if (voArcs.InnerArcs != null)
{
foreach (Arcs arcs in voArcs.InnerArcs)
{
float fTest = EvaluateArcExpression(voBeliefNode, arcs);
fValue = (fValue <= fTest ? fValue : fTest);
}
}
foreach (Arc arc in voArcs.ArcList)
{
float fTest = CalculateEffectiveArcLambda(voBeliefNode, arc);
fValue = (fValue <= fTest ? fValue : fTest);
}
return fValue;
}
/// <summary>
/// Construct the Belief Node given the input Xml
/// </summary>
/// <param name="vsXml">Xml Data</param>
public BeliefNode(string vsXml)
{
XmlTextReader reader = new XmlTextReader(new StringReader(vsXml));
reader.Read();
Name = reader.GetAttribute("name");
PriorProbability = float.Parse(reader.GetAttribute("priorprob"));
CurrentProbability = float.Parse(reader.GetAttribute("currentprob"));
while(reader.Read())
{
switch (reader.Name)
{
case "Arcs" :
moArcs = new Arcs(reader.ReadOuterXml());
break;
}
}
}
/// <summary>
/// For a single Arc, this evalulate the expressions
/// </summary>
/// <param name="voArcs">Arcs</param>
/// <returns>Arc Expression</returns>
public float EvaluateArcExpression(BeliefNode voBeliefNode, Arcs voArcs)
{
switch (voArcs.ArcType)
{
case EnumArcType.Independent :
return CalculateCombinedIndependent(voBeliefNode, voArcs);
case EnumArcType.Conjunctive:
return CalculateCombinedConjunctive(voBeliefNode, voArcs);
case EnumArcType.Disjunctive :
return CalculateCombinedDisjunctive(voBeliefNode, voArcs);
default:
throw new Exception(string.Format("Invalid arc type {0}",voArcs.ArcType.ToString()));
}
}
/// <summary>
/// For the List of Arc Calculate the Combined Independent value
/// </summary>
/// <param name="voArcs">List of Arc</param>
/// <returns>Calculated Lambda</returns>
public float CalculateCombinedIndependent(BeliefNode voBeliefNode, Arcs voArcs)
{
float fCombined = 1.0f;
if (voArcs.InnerArcs != null)
{
foreach (Arcs arcs in voArcs.InnerArcs)
{
fCombined *= EvaluateArcExpression(voBeliefNode, arcs);
}
}
foreach (Arc arc in voArcs.ArcList)
{
fCombined *= CalculateEffectiveArcLambda(voBeliefNode, arc);
}
return fCombined;
}
