h
=
1
η
(
t
)
=
1
mincost
Φ
=
0
when
λ
=
0
h
=
1
η
(
t
)
=
t
mincost
Φ
=
0
when
λ
=
0
h
=
0
η
(
t
)
=
1
−
t
mincost
Φ
=
0
when
λ
=
0