public Task <Pollinator> ApplyRuleAsync(Pollinator pollinator, ResetPollinationRuleArgument ruleArgument)
{
var current = ruleArgument.NewPollinator;
var group = ruleArgument.Group;
return(Task.Run(() =>
{
if (!current.CheckWhetherValuesCorrect())
{
_logger.Error($"Pollinator got NaN or +/- Infinity. Pollinator - {PollinatorExtensions.ToString(current)}");
return pollinator;
}
Pollinator best;
var currentSolution = pollinator.CountFunction(_functionStrategy);
var newSolution = current.CountFunction(_functionStrategy);
_logger.Trace($"Current solution {currentSolution}");
_logger.Trace($"New solution {newSolution}");
if (currentSolution > newSolution && _isMin ||
newSolution > currentSolution && !_isMin)
{
group.Replace(pollinator, current);
best = current;
}
else
{
best = pollinator;
}
if (RandomGenerator.Random.NextDouble() < _pReset)
{
_logger.Trace($"Before pollinator reset is {PollinatorExtensions.ToString(best)}");
var generated = _pollinatorUpdater.Update(best);
group.Replace(best, generated);
best = generated;
_logger.Trace($"After pollinator reset is {PollinatorExtensions.ToString(best)}");
}
return best;
}));
}
public Task <Pollinator> ApplyRuleAsync(Pollinator pollinator, LocalPollinationRuleArgument ruleArgument)
{
var randomPollinator = ruleArgument.RandomPollinator;
_logger.Trace($"Random pollinator is {PollinatorExtensions.ToString(randomPollinator)}");
_logger.Trace($"Current pollinator is {PollinatorExtensions.ToString(pollinator)}");
return(Task.Run(() =>
{
var rand = RandomGenerator.Random.NextDouble();
var result = pollinator + rand * randomPollinator - pollinator;
_logger.Trace($"Global result pollinator is {PollinatorExtensions.ToString(result)}");
return result;
}));
}
public async Task <Pollinator> PolinateAsync()
{
var t = 0;
var bestSolution = _groups.GetBestSolution(_functionStrategy, _algorithmSettings.IsMin);
while (++t <= _algorithmSettings.MaxGeneration)
{
_logger.Debug($"Start step {t}");
await PolinateOnceAsync();
bestSolution = _groups.GetBestSolution(_functionStrategy, _algorithmSettings.IsMin);
OnStepFinished(new StepFinishedArgs(bestSolution, t));
_logger.Debug($"Best pollinator after step {t} is {PollinatorExtensions.ToString(bestSolution)}");
_logger.Debug($"Best solution after step {t} is {bestSolution.CountFunction(_functionStrategy)}");
}
return(bestSolution);
}
public Task <Pollinator> ApplyRuleAsync(Pollinator pollinator, GlobalPollinationRuleArgument ruleArgument)
{
var bestPollinator = ruleArgument.BestPollinator;
_logger.Trace($"Best pollinator is {PollinatorExtensions.ToString(bestPollinator)}");
_logger.Trace($"Current pollinator is {PollinatorExtensions.ToString(pollinator)}");
return(Task.Run(() =>
{
var distanceDifference = (pollinator - bestPollinator)
.CountFunction(FunctionStrategies.FunctionStrategies.DistanceFunction);
var lambda = FunctionStrategies.FunctionStrategies.LambdaFunction(distanceDifference);
var rand = FunctionStrategies.FunctionStrategies.MantegnaFunction(lambda);
var result = pollinator + rand * (pollinator - bestPollinator);
_logger.Trace($"Global result pollinator is {PollinatorExtensions.ToString(result)}");
return result;
}));
}