internal MemoryState Process(Head[] heads)
{
int headCount = heads.Length;
int memoryColumnsN = _memory.CellCountN;
ReadData[] newReadDatas = new ReadData[headCount];
HeadSetting[] newHeadSettings = new HeadSetting[headCount];
for (int i = 0; i < headCount; i++)
{
Head head = heads[i];
BetaSimilarity[] similarities = new BetaSimilarity[_memory.CellCountN];
for (int j = 0; j < memoryColumnsN; j++)
{
Unit[] memoryColumn = _memory.Data[j];
SimilarityMeasure similarity = new SimilarityMeasure(new CosineSimilarityFunction(), head.KeyVector, memoryColumn);
similarities[j] = new BetaSimilarity(head.Beta, similarity);
}
ContentAddressing ca = new ContentAddressing(similarities);
GatedAddressing ga = new GatedAddressing(head.Gate, ca, _headSettings[i]);
ShiftedAddressing sa = new ShiftedAddressing(head.Shift, ga);
newHeadSettings[i] = new HeadSetting(head.Gamma, sa);
newReadDatas[i] = new ReadData(newHeadSettings[i], _memory);
}
NTMMemory newMemory = new NTMMemory(newHeadSettings, heads, _memory);
return(new MemoryState(newMemory, newHeadSettings, newReadDatas));
}
internal HeadSetting(int memoryColumnsN, ContentAddressing contentAddressing)
{
AddressingVector = UnitFactory.GetVector(memoryColumnsN);
for (int i = 0; i < memoryColumnsN; i++)
{
AddressingVector[i].Value = contentAddressing.ContentVector[i].Value;
}
}
internal GatedAddressing(Unit gate, ContentAddressing contentAddressing, HeadSetting oldHeadSettings)
{
_gate = gate;
ContentVector = contentAddressing;
_oldHeadSettings = oldHeadSettings;
Unit[] contentVector = ContentVector.ContentVector;
_memoryCellCount = contentVector.Length;
GatedVector = UnitFactory.GetVector(_memoryCellCount);
//Implementation of focusing by location - page 8 part 3.3.2. Focusing by Location
_gt = Sigmoid.GetValue(_gate.Value);
_oneminusgt = (1 - _gt);
for (int i = 0; i < _memoryCellCount; i++)
{
GatedVector[i].Value = (_gt * contentVector[i].Value) + (_oneminusgt * _oldHeadSettings.AddressingVector[i].Value);
}
}
public ContentAddressing[] GetContentAddressing()
{
return(ContentAddressing.GetVector(HeadCount, i => _oldSimilarities[i]));
}
