Schemes	k	Non-normalized	Normalized
SOU	−1	$ϕ_{f} = \frac{3}{2} ϕ_{C} - \frac{1}{2} ϕ_{U}$	${\hat{ϕ}}_{f} = \frac{3}{2} {\hat{ϕ}}_{C}$
CD	1	$ϕ_{f} = \frac{1}{2} ϕ_{C} + \frac{1}{2} ϕ_{D}$	${\hat{ϕ}}_{f} = \frac{1}{2} {\hat{ϕ}}_{C} + \frac{1}{2}$
Fromm	0	$ϕ_{f} = ϕ_{C} + \frac{1}{4} (ϕ_{D} - ϕ_{U})$	${\hat{ϕ}}_{f} = {\hat{ϕ}}_{C} + \frac{1}{4}$
QUICK	$\frac{1}{2}$	$ϕ_{f} = \frac{3}{4} ϕ_{C} + \frac{3}{8} ϕ_{D} - \frac{1}{8} ϕ_{U}$	${\hat{ϕ}}_{f} = \frac{3}{4} {\hat{ϕ}}_{C} + \frac{3}{8}$
CUI	$\frac{1}{3}$	$ϕ_{f} = \frac{5}{6} ϕ_{C} + \frac{1}{3} ϕ_{D} - \frac{1}{6} ϕ_{U}$	${\hat{ϕ}}_{f} = \frac{5}{6} {\hat{ϕ}}_{C} + \frac{1}{3}$