public Batch <double[]> PropagateForward(Batch <double[]> batch, bool isTraining)
{
if (isTraining)
{
var parallelOptions = new ParallelOptions();
var tuple = Tuple.Create <double[][], double[][]>(new double[batch.Size][], new double[batch.Size][]);
parallelOptions.MaxDegreeOfParallelism = 2 * Environment.ProcessorCount;
Parallel.ForEach <double[], List <Tuple <long, double[], double[]> > >(batch, parallelOptions, () => new List <Tuple <long, double[], double[]> >(), (vector1, state, index, local) =>
{
Random random = random = RandomProvider.GetRandom();;
double[] masks = new double[vector1.Length];
double[] vector2 = new double[vector1.Length];
for (int i = 0; i < vector1.Length; i++)
{
double probability = random.Binomial(1, this.rate);
masks[i] = probability;
vector2[i] = vector1[i] * probability;
}
local.Add(Tuple.Create <long, double[], double[]>(index, masks, vector2));
return(local);
}, (local) =>
{
lock (tuple)
{
local.ForEach(x =>
{
tuple.Item1[x.Item1] = x.Item2;
tuple.Item2[x.Item1] = x.Item3;
});
}
});
this.masks = tuple.Item1;
return(new Batch <double[]>(tuple.Item2));
}
return(batch);
}