public void testNoChangeToNonSelectedMatchingSegmentsInBurstingColumn()
{
TemporalMemory tm = new TemporalMemory();
Connections cn = new Connections();
Parameters p = GetDefaultParameters(null, Parameters.KEY.PERMANENCE_DECREMENT, 0.08);
p.Apply(cn);
TemporalMemory.Init(cn);
int[] previousActiveColumns = { 0 };
int[] activeColumns = { 1 };
Cell[] previousActiveCells = { cn.GetCell(0), cn.GetCell(1), cn.GetCell(2), cn.GetCell(3) };
Cell[] burstingCells = { cn.GetCell(4), cn.GetCell(5) };
DistalDendrite selectedMatchingSegment = cn.CreateSegment(burstingCells[0]);
cn.CreateSynapse(selectedMatchingSegment, previousActiveCells[0], 0.3);
cn.CreateSynapse(selectedMatchingSegment, previousActiveCells[1], 0.3);
cn.CreateSynapse(selectedMatchingSegment, previousActiveCells[2], 0.3);
cn.CreateSynapse(selectedMatchingSegment, cn.GetCell(81), 0.3);
DistalDendrite otherMatchingSegment = cn.CreateSegment(burstingCells[1]);
Synapse as1 = cn.CreateSynapse(otherMatchingSegment, previousActiveCells[0], 0.3);
Synapse as2 = cn.CreateSynapse(otherMatchingSegment, previousActiveCells[1], 0.3);
Synapse is1 = cn.CreateSynapse(otherMatchingSegment, cn.GetCell(81), 0.3);
tm.Compute(cn, previousActiveColumns, true);
tm.Compute(cn, activeColumns, true);
Assert.AreEqual(0.3, as1.GetPermanence(), 0.01);
Assert.AreEqual(0.3, as2.GetPermanence(), 0.01);
Assert.AreEqual(0.3, is1.GetPermanence(), 0.01);
}
public void testReinforcedCorrectlyActiveSegments()
{
TemporalMemory tm = new TemporalMemory();
Connections cn = new Connections();
Parameters p = GetDefaultParameters(null, Parameters.KEY.INITIAL_PERMANENCE, 0.2);
p = GetDefaultParameters(p, Parameters.KEY.MAX_NEW_SYNAPSE_COUNT, 4);
p = GetDefaultParameters(p, Parameters.KEY.PERMANENCE_DECREMENT, 0.08);
p = GetDefaultParameters(p, Parameters.KEY.PREDICTED_SEGMENT_DECREMENT, 0.02);
p.Apply(cn);
TemporalMemory.Init(cn);
int[] previousActiveColumns = { 0 };
int[] activeColumns = { 1 };
Cell[] previousActiveCells = { cn.GetCell(0), cn.GetCell(1), cn.GetCell(2), cn.GetCell(3) };
Cell activeCell = cn.GetCell(5);
DistalDendrite activeSegment = cn.CreateSegment(activeCell);
Synapse as1 = cn.CreateSynapse(activeSegment, previousActiveCells[0], 0.5);
Synapse as2 = cn.CreateSynapse(activeSegment, previousActiveCells[1], 0.5);
Synapse as3 = cn.CreateSynapse(activeSegment, previousActiveCells[2], 0.5);
Synapse is1 = cn.CreateSynapse(activeSegment, cn.GetCell(81), 0.5);
tm.Compute(cn, previousActiveColumns, true);
tm.Compute(cn, activeColumns, true);
Assert.AreEqual(0.6, as1.GetPermanence(), 0.1);
Assert.AreEqual(0.6, as2.GetPermanence(), 0.1);
Assert.AreEqual(0.6, as3.GetPermanence(), 0.1);
Assert.AreEqual(0.42, is1.GetPermanence(), 0.001);
}
public void testAdaptSegmentToMax()
{
TemporalMemory tm = new TemporalMemory();
Connections cn = new Connections();
Parameters p = Parameters.GetAllDefaultParameters();
p.Apply(cn);
TemporalMemory.Init(cn);
DistalDendrite dd = cn.CreateSegment(cn.GetCell(0));
Synapse s1 = cn.CreateSynapse(dd, cn.GetCell(23), 0.9);
tm.AdaptSegment(cn, dd, cn.GetCellSet(23), cn.GetPermanenceIncrement(), cn.GetPermanenceDecrement());
Assert.AreEqual(1.0, s1.GetPermanence(), 0.1);
// Now permanence should be at max
tm.AdaptSegment(cn, dd, cn.GetCellSet(23), cn.GetPermanenceIncrement(), cn.GetPermanenceDecrement());
Assert.AreEqual(1.0, s1.GetPermanence(), 0.1);
}
public void testNoChangeToMatchingSegmentsInPredictedActiveColumn()
{
TemporalMemory tm = new TemporalMemory();
Connections cn = new Connections();
Parameters p = GetDefaultParameters();
p.Apply(cn);
TemporalMemory.Init(cn);
int[] previousActiveColumns = { 0 };
int[] activeColumns = { 1 };
Cell[] previousActiveCells = { cn.GetCell(0), cn.GetCell(1), cn.GetCell(2), cn.GetCell(3) };
Cell expectedActiveCell = cn.GetCell(4);
HashSet <Cell> expectedActiveCells = new HashSet <Cell> {
expectedActiveCell
}; // Stream.of(expectedActiveCell).collect(Collectors.toCollection(HashSet < Cell >::new));
Cell otherBurstingCell = cn.GetCell(5);
DistalDendrite activeSegment = cn.CreateSegment(expectedActiveCell);
cn.CreateSynapse(activeSegment, previousActiveCells[0], 0.5);
cn.CreateSynapse(activeSegment, previousActiveCells[1], 0.5);
cn.CreateSynapse(activeSegment, previousActiveCells[2], 0.5);
cn.CreateSynapse(activeSegment, previousActiveCells[3], 0.5);
DistalDendrite matchingSegmentOnSameCell = cn.CreateSegment(expectedActiveCell);
Synapse s1 = cn.CreateSynapse(matchingSegmentOnSameCell, previousActiveCells[0], 0.3);
Synapse s2 = cn.CreateSynapse(matchingSegmentOnSameCell, previousActiveCells[1], 0.3);
DistalDendrite matchingSegmentOnOtherCell = cn.CreateSegment(otherBurstingCell);
Synapse s3 = cn.CreateSynapse(matchingSegmentOnOtherCell, previousActiveCells[0], 0.3);
Synapse s4 = cn.CreateSynapse(matchingSegmentOnOtherCell, previousActiveCells[1], 0.3);
ComputeCycle cc = tm.Compute(cn, previousActiveColumns, true);
Assert.IsTrue(cc.PredictiveCells().SetEquals(expectedActiveCells));
tm.Compute(cn, activeColumns, true);
Assert.AreEqual(0.3, s1.GetPermanence(), 0.01);
Assert.AreEqual(0.3, s2.GetPermanence(), 0.01);
Assert.AreEqual(0.3, s3.GetPermanence(), 0.01);
Assert.AreEqual(0.3, s4.GetPermanence(), 0.01);
}
public void testAdaptSegment()
{
TemporalMemory tm = new TemporalMemory();
Connections cn = new Connections();
Parameters p = Parameters.GetAllDefaultParameters();
p.Apply(cn);
TemporalMemory.Init(cn);
DistalDendrite dd = cn.CreateSegment(cn.GetCell(0));
Synapse s1 = cn.CreateSynapse(dd, cn.GetCell(23), 0.6);
Synapse s2 = cn.CreateSynapse(dd, cn.GetCell(37), 0.4);
Synapse s3 = cn.CreateSynapse(dd, cn.GetCell(477), 0.9);
tm.AdaptSegment(cn, dd, cn.GetCellSet(23, 37), cn.GetPermanenceIncrement(), cn.GetPermanenceDecrement());
Assert.AreEqual(0.7, s1.GetPermanence(), 0.01);
Assert.AreEqual(0.5, s2.GetPermanence(), 0.01);
Assert.AreEqual(0.8, s3.GetPermanence(), 0.01);
}
public void testPunishMatchingSegmentsInInactiveColumns()
{
TemporalMemory tm = new TemporalMemory();
Connections cn = new Connections();
Parameters p = GetDefaultParameters(null, Parameters.KEY.MAX_NEW_SYNAPSE_COUNT, 4);
p = GetDefaultParameters(p, Parameters.KEY.INITIAL_PERMANENCE, 0.2);
p = GetDefaultParameters(p, Parameters.KEY.PREDICTED_SEGMENT_DECREMENT, 0.02);
p.Apply(cn);
TemporalMemory.Init(cn);
int[] prevActiveColumns = { 0 };
Cell[] prevActiveCells = { cn.GetCell(0), cn.GetCell(1), cn.GetCell(2), cn.GetCell(3) };
int[] activeColumns = { 1 };
Cell previousInactiveCell = cn.GetCell(81);
DistalDendrite activeSegment = cn.CreateSegment(cn.GetCell(42));
Synapse as1 = cn.CreateSynapse(activeSegment, prevActiveCells[0], .5);
Synapse as2 = cn.CreateSynapse(activeSegment, prevActiveCells[1], .5);
Synapse as3 = cn.CreateSynapse(activeSegment, prevActiveCells[2], .5);
Synapse is1 = cn.CreateSynapse(activeSegment, previousInactiveCell, .5);
DistalDendrite matchingSegment = cn.CreateSegment(cn.GetCell(43));
Synapse as4 = cn.CreateSynapse(matchingSegment, prevActiveCells[0], .5);
Synapse as5 = cn.CreateSynapse(matchingSegment, prevActiveCells[1], .5);
Synapse is2 = cn.CreateSynapse(matchingSegment, previousInactiveCell, .5);
tm.Compute(cn, prevActiveColumns, true);
tm.Compute(cn, activeColumns, true);
Assert.AreEqual(0.48, as1.GetPermanence(), 0.01);
Assert.AreEqual(0.48, as2.GetPermanence(), 0.01);
Assert.AreEqual(0.48, as3.GetPermanence(), 0.01);
Assert.AreEqual(0.48, as4.GetPermanence(), 0.01);
Assert.AreEqual(0.48, as5.GetPermanence(), 0.01);
Assert.AreEqual(0.50, is1.GetPermanence(), 0.01);
Assert.AreEqual(0.50, is2.GetPermanence(), 0.01);
}