public void CanStoreABit(bool expected)
{
var sut = new MemoryGate(new NAnd(new Not(), new And()));
var result = sut.Apply(expected, true);
Assert.AreEqual(expected, result);
}
public void CanKeepTheValueOfABit()
{
var sut = new MemoryGate(new NAnd(new Not(), new And()));
// set the initial state of the memory to on
var result = sut.Apply(true, true);
// assert that the bit is set
Assert.AreEqual(true, result);
// turn off set mode and try and set the input bit to off
result = sut.Apply(false, false);
Assert.AreEqual(true, result);
}
/// <summary>
/// Evaluates the state.
/// </summary>
/// <returns></returns>
public override double Evaluate()
{
// guarantee updates to Input
base.Evaluate();
if (In.Count > 0)
{
// is hidden unit - apply memory states
// Input is equal to combined input weights with bias values
R = ResetGate.Compute(Rx * Input + Rh * H + Rb);
Z = MemoryGate.Compute(Zx * Input + Zh * H + Zb);
var htP = ActivationFunction.Compute(Input + R * H);
H = (1.0 - Z) * H + Z * htP;
Output = OutputFunction?.Compute(H) ?? H;
}
return(Output);
}