private void CrossEntropy2(ref StateDependentGammaInfo gammaInfo, double tempRareEvent) { IBoolean tempRareEventExpression = new EqualTo(_reExpression, new ConstantValue(tempRareEvent)); var startPC = Enumerable.Repeat(1.0, _reactions.NumReactions).ToArray(); var endPC = new double[_reactions.NumReactions]; var rateUpdateMethod = new ReactionRatesUpdateMethod(_reactions.UpdateRatesIteration2); for (int i = 0; i < _crossEntropyRuns; i++) { StartRealization(); var n = new List <int[]>(); var lambda = new List <double[]>(); double weight = 1.0; for (int j = 0; j < _reactions.NumReactions; j++) { n.Add(new int[(gammaInfo.IntermediatePropensityCutoff[j]).Length + 1]); lambda.Add(new double[(gammaInfo.IntermediatePropensityCutoff[j]).Length + 1]); } while (CurrentTime < duration) { if (tempRareEventExpression.Value) { gammaInfo.UpdateGamma(weight, n, lambda); break; } GenericStepOnce(ref weight, gammaInfo, ref startPC, ref endPC, ref n, ref lambda, rateUpdateMethod, ref _binIndex, null); } } gammaInfo.SetIntermediateGamma(); }
private void CrossEntropy1(ref StateDependentGammaInfo gammaInfo, ref double intermediateRareEvent, ref double[] startPC, ref double[] endPC, ref bool rareEventFlag) { var maxRareEventValue = new double[_crossEntropyRuns]; int counter = 0; var rateUpdateMethod = new ReactionRatesUpdateMethod(_reactions.UpdateRatesIteration1); var binEdgesUpdateMethod = new BinEdgesUpdateMethod(UpdateBinEdges); for (int i = 0; i < _crossEntropyRuns; i++) { StartRealization(); double currentMin = _rareEventType * (_rareEventValue - _reExpression.Value); var n = new List <int[]>(); var lambda = new List <double[]>(); double weight = 1.0; for (int j = 0; j < _reactions.NumReactions; j++) { n.Add(new int[(gammaInfo.IntermediatePropensityCutoff[j]).Length + 1]); lambda.Add(new double[(gammaInfo.IntermediatePropensityCutoff[j]).Length + 1]); } while (CurrentTime < duration) { if (_rareEventTest.Value) { counter++; gammaInfo.UpdateGamma(weight, n, lambda); break; } GenericStepOnce(ref weight, gammaInfo, ref startPC, ref endPC, ref n, ref lambda, rateUpdateMethod, ref _gammaIndex, binEdgesUpdateMethod); double tempMin = _rareEventType * (_rareEventValue - _reExpression.Value); currentMin = Math.Min(currentMin, tempMin); } maxRareEventValue[i] = currentMin; } Array.Sort(maxRareEventValue); double ireComp = maxRareEventValue[(int)Math.Ceiling(_crossEntropyRuns * _crossEntropyThreshold)]; double pastIntermediateRareEvent = intermediateRareEvent; intermediateRareEvent = ireComp < 0 ? _rareEventValue : _rareEventType * (_rareEventValue - ireComp); if ((pastIntermediateRareEvent - intermediateRareEvent) * _rareEventType >= 0) { _crossEntropyThreshold *= 0.8; Console.WriteLine("Cross entropy threshold changed to : " + _crossEntropyThreshold); if (_crossEntropyThreshold * _crossEntropyRuns * 0.8 < _crossEntropyMinDataSize) { _crossEntropyRuns = (int)Math.Ceiling(_crossEntropyMinDataSize / _crossEntropyThreshold); Console.WriteLine("Number of cross entropy simulations changed to : " + _crossEntropyRuns); } } if (intermediateRareEvent >= _rareEventValue && counter >= (int)(_crossEntropyRuns * _crossEntropyThreshold)) { rareEventFlag = true; gammaInfo.SetIntermediateGamma(); } }