public decimal GetdIdt(
FhirDateTime t_IndexElement,
Interfaces.Parameters.DiseaseInducedDeathRateSymptomaticIndividuals.Id d_1,
C19M.M.C.A.Gumel2004.Interfaces.Parameters.IsolationRateSymptomaticIndividuals.Iγ γ_2,
C19M.M.C.A.Gumel2004.Interfaces.Parameters.DevelopmentClinicalSymptomsRateAsymptomaticIndividuals.Iκ κ_1,
Iμ μ,
C19M.M.C.A.Gumel2004.Interfaces.Parameters.RecoveryRateSymptomaticIndividuals.Iσ σ_1,
double E,
double I)
{
return
(κ_1.Value.Value.Value * (decimal)E
-
(γ_2.Value.Invoke(t_IndexElement).Value.Value + d_1.Value.Value.Value + σ_1.Value.Value.Value + μ.Value.Value.Value) * (decimal)I);
}
// https://stackoverflow.com/a/55004295
private Func <double, MathNet.Numerics.LinearAlgebra.Vector <double>, MathNet.Numerics.LinearAlgebra.Vector <double> > f(
It t,
Interfaces.Parameters.DiseaseInducedDeathRateSymptomaticIndividuals.Id d_1,
Interfaces.Parameters.DiseaseInducedDeathRateIsolatedIndividuals.Id d_2,
Ip p,
Iβ β,
C19M.M.C.A.Gumel2004.Interfaces.Parameters.QuarantineRateAsymptomaticIndividuals.Iγ γ_1,
C19M.M.C.A.Gumel2004.Interfaces.Parameters.IsolationRateSymptomaticIndividuals.Iγ γ_2,
C19M.M.C.A.Gumel2004.Interfaces.Parameters.TransmissionCoefficientModificationFactorAsymptomaticIndividuals.Iε ε_E,
C19M.M.C.A.Gumel2004.Interfaces.Parameters.TransmissionCoefficientModificationFactorIsolatedIndividuals.Iε ε_J,
C19M.M.C.A.Gumel2004.Interfaces.Parameters.TransmissionCoefficientModificationFactorQuarantinedIndividuals.Iε ε_Q,
C19M.M.C.A.Gumel2004.Interfaces.Parameters.DevelopmentClinicalSymptomsRateAsymptomaticIndividuals.Iκ κ_1,
C19M.M.C.A.Gumel2004.Interfaces.Parameters.DevelopmentClinicalSymptomsRateQuarantinedIndividuals.Iκ κ_2,
Iμ μ,
IΠ Π,
C19M.M.C.A.Gumel2004.Interfaces.Parameters.RecoveryRateSymptomaticIndividuals.Iσ σ_1,
C19M.M.C.A.Gumel2004.Interfaces.Parameters.RecoveryRateIsolatedIndividuals.Iσ σ_2,
C19M.M.C.A.Gumel2004.Interfaces.Variables.AsymptomaticIndividuals.IE E,
C19M.M.C.A.Gumel2004.Interfaces.Variables.SymptomaticIndividuals.II I,
C19M.M.C.A.Gumel2004.Interfaces.Variables.IsolatedIndividuals.IJ J,
C19M.M.C.A.Gumel2004.Interfaces.Variables.QuarantinedIndividuals.IQ Q,
C19M.M.C.A.Gumel2004.Interfaces.Variables.RecoveredIndividuals.IR R,
C19M.M.C.A.Gumel2004.Interfaces.Variables.SusceptibleIndividuals.IS S)
{
return((T, x) =>
{
return MathNet.Numerics.LinearAlgebra.Vector <double> .Build.Dense(new[] {
(double)E.GetdEdt(
new FhirDateTime(
new DateTimeOffset(
t.StartDate.ToDateTimeOffset(TimeSpan.Zero).UtcDateTime.Date.AddDays(T))),
p,
β,
γ_1,
γ_2,
ε_E,
ε_J,
ε_Q,
κ_1,
μ,
E: x[0],
I: x[1],
J: x[2],
N: x.Sum(),
Q: x[3],
S: x[5]),
(double)I.GetdIdt(
new FhirDateTime(
new DateTimeOffset(
t.StartDate.ToDateTimeOffset(TimeSpan.Zero).UtcDateTime.Date.AddDays(T))),
d_1,
γ_2,
κ_1,
μ,
σ_1,
E: x[0],
I: x[1]),
(double)J.GetdJdt(
new FhirDateTime(
new DateTimeOffset(
t.StartDate.ToDateTimeOffset(TimeSpan.Zero).UtcDateTime.Date.AddDays(T))),
d_2,
γ_2,
κ_2,
μ,
σ_2,
I: x[1],
J: x[2],
Q: x[3]),
(double)Q.GetdQdt(
new FhirDateTime(
new DateTimeOffset(
t.StartDate.ToDateTimeOffset(TimeSpan.Zero).UtcDateTime.Date.AddDays(T))),
γ_1,
κ_2,
μ,
E: x[0],
Q: x[3]),
(double)R.GetdRdt(
μ,
σ_1,
σ_2,
I: x[1],
J: x[2],
R: x[4]),
(double)S.GetdSdt(
new FhirDateTime(
new DateTimeOffset(
t.StartDate.ToDateTimeOffset(TimeSpan.Zero).UtcDateTime.Date.AddDays(T))),
β,
ε_E,
ε_J,
ε_Q,
μ,
Π,
E: x[0],
I: x[1],
J: x[2],
N: x.Sum(),
Q: x[3],
S: x[5])
});
});
}