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53 changes: 53 additions & 0 deletions test/identifiable_functions.jl
Original file line number Diff line number Diff line change
Expand Up @@ -1093,6 +1093,59 @@ ident_funcs = [
]
push!(test_cases, (ode = ode, ident_funcs = ident_funcs, with_states = false))

# Examples from https://doi.org/10.1016/j.mbs.2011.06.001
# From Section 6
ode = @ODEmodel(
x1'(t) = -(a1 + a2) * x1(t) * Vm / (Km + x1(t)) + k21 * x2(t) + b1 * u(t),
x2'(t) = a2 * x1(t) * Vm / (Km + x1(t)) - (k02 + k12) * x2(t),
y(t) = c * x1(t)
)
ident_funcs = [
k02 + k12,
b1 * c,
Km * c,
Vm * a1 * c + Vm * a2 * c,
(a2 * k21) // (a1 + a2), # this one is different
]
ident_funcs_states = [
k02 + k12,
b1 * c,
Km * c,
x1 * c,
x2 * c * k21,
(Vm * a2) // x2,
Vm * a1 * c + Vm * a2 * c,
]
push!(test_cases, (ode = ode, ident_funcs = ident_funcs, with_states = false))
push!(test_cases, (ode = ode, ident_funcs = ident_funcs_states, with_states = true))

# From Section 11
ode = @ODEmodel(
T'(t) = lambda - rho * T(t) - beta * T(t) * V(t),
Tast'(t) = beta * T(t) * V(t) - delta * Tast(t),
V'(t) = N * delta * Tast(t) - c * V(t),
y(t) = V(t)
)
ident_funcs = [
rho,
beta,
c + delta,
c * delta,
N * delta * lambda,
]
ident_funcs_states = [
rho,
beta,
V,
c + delta,
c * delta,
T // lambda,
N * delta * lambda,
Tast * N * delta + V * delta,
]
push!(test_cases, (ode = ode, ident_funcs = ident_funcs, with_states = false))
push!(test_cases, (ode = ode, ident_funcs = ident_funcs_states, with_states = true))

@testset "Identifiable functions of parameters" begin
p = 0.99
for case in test_cases
Expand Down