CÔNG TH C Đ A CH TƯ Ị Ấ
100
1e
e
nRongDo +
=
n
n
eRongSoHe −
=100
0
*
e
W
GHoaBaoDo ∆
=
minmax
0max
ee
ee
DCatcuaChatDo −
−
=
PLp
WWIDeoSoChi −=
P
P
I
WW
BSetDo −
=
CtgCatChongSuc +=
ϕστ
*
1
1
2
,1
)/(
−
−
−
−
−
=
nn
nn
nn
ee
kgfcmaLúnNénSôHê
σσ