public void TestScoreBasedLearning()
{
var model = new SimpleBayesianExampleModel();
Func <bool> hazard = () => model.Component.Hazard;
Func <bool> state = () => model.Component.NoDataAvailable || model.Component.SubsystemError;
var states = new Dictionary <string, Func <bool> > { /*["State"] = state*/
};
var config = BayesianLearningConfiguration.Default;
var bayesianCreator = new BayesianNetworkCreator(model, 10, config);
var result = bayesianCreator.LearnScoreBasedBayesianNetwork(@"C:\SafetySharpSimulation\", 100000, hazard, states);
}
public void CalculateHazardProbability()
{
var tc = SafetySharpModelChecker.TraversalConfiguration;
tc.WriteGraphvizModels = true;
tc.MomentOfIndependentFaultActivation = MomentOfIndependentFaultActivation.OnFirstMethodWithoutUndo;
SafetySharpModelChecker.TraversalConfiguration = tc;
var model = new SimpleBayesianExampleModel();
var result = SafetySharpModelChecker.CalculateProbabilityToReachStateBounded(model, model.Component.Hazard, 20);
Console.WriteLine($"Probability of hazard in model: {result}");
}
public void CalculateBayesianNetworkProbabilities()
{
const string filePath = "network.json";
var model = new SimpleBayesianExampleModel();
Func <bool> hazard = () => model.Component.Hazard;
var bayesianNetworkCreator = new BayesianNetworkCreator(model, 10);
var network = bayesianNetworkCreator.FromJson(filePath, hazard);
var calculator = new BayesianNetworkProbabilityDistributionCalculator(network, 0.0000000001);
var result = calculator.CalculateConditionalProbabilityDistribution(new[] { "FS" }, new[] { "FV", "FL" });
Console.Out.WriteLine(string.Join("\n", result));
}
public void TestConstraintBasedLearning()
{
var model = new SimpleBayesianExampleModel();
Func <bool> hazard = () => model.Component.Hazard;
Func <bool> state = () => true;
var states = new Dictionary <string, Func <bool> > { /*["State"] = state*/
};
var config = BayesianLearningConfiguration.Default;
var bayesianNetworkCreator = new BayesianNetworkCreator(model, 10, config);
var result = bayesianNetworkCreator.LearnConstraintBasedBayesianNetwork(hazard, states, new[] { model.Component.FL, model.Component.FS, model.Component.FV });
}
public void SerializeAndDeserializeBayesianNetwork()
{
const string filePath = "network.json";
var model = new SimpleBayesianExampleModel();
Func <bool> hazard = () => model.Component.Hazard;
var config = BayesianLearningConfiguration.Default;
config.BayesianNetworkSerializationPath = filePath;
var bayesianNetworkCreator = new BayesianNetworkCreator(model, 10, config);
var result = bayesianNetworkCreator.LearnConstraintBasedBayesianNetwork(hazard, null, new[] { model.Component.FL, model.Component.FS, model.Component.FV });
bayesianNetworkCreator = new BayesianNetworkCreator(model, 10);
var network = bayesianNetworkCreator.FromJson(filePath, hazard);
}
public void CalculateDcca()
{
var model = new SimpleBayesianExampleModel();
var analysis = new SafetySharpSafetyAnalysis
{
Backend = SafetyAnalysisBackend.FaultOptimizedOnTheFly,
Heuristics = { new MaximalSafeSetHeuristic(model.Faults) }
};
var result = analysis.ComputeMinimalCriticalSets(model, model.Component.Hazard);
var orderResult = SafetySharpOrderAnalysis.ComputeOrderRelationships(result);
Console.WriteLine(orderResult);
}
public void CalculateFaultProbabilities()
{
var tc = SafetySharpModelChecker.TraversalConfiguration;
tc.WriteGraphvizModels = true;
tc.MomentOfIndependentFaultActivation = MomentOfIndependentFaultActivation.OnFirstMethodWithoutUndo;
SafetySharpModelChecker.TraversalConfiguration = tc;
var model = new SimpleBayesianExampleModel();
var isFlActivated = SafetySharpModelChecker.CalculateProbabilityToReachStateBounded(model, model.Component.FL.IsActivated, 20);
var isFvActivated = SafetySharpModelChecker.CalculateProbabilityToReachStateBounded(model, model.Component.FV.IsActivated, 20);
var isFsActivated = SafetySharpModelChecker.CalculateProbabilityToReachStateBounded(model, model.Component.FS.IsActivated, 20);
Console.WriteLine($"Probability that Fault1 is activated: {isFlActivated}");
Console.WriteLine($"Probability that Fault2 is activated: {isFvActivated}");
Console.WriteLine($"Probability that Fault2 is activated: {isFsActivated}");
}
