Information Technology Reference
In-Depth Information
(max,ave)-column-aggregation
l
l
l 0 ,
max
1
m α
j ,
min
m β
j
i
1
i
j = 1 μ k 1 , l j ,
j = 1 ν k 1 , l j
n
n
k
k
1
n
1
n
k 1 , α
1
1
σ max (
,
l 0 ) =
,
A
.
.
j = 1 μ k m , l j ,
n
j = 1 ν k m , l j
n
k
k
1
n
1
n
k m , α
m
m
(max,min)-column-aggregation
l
l
l 0 ,
max
1
m α
j ,
min
m β
j
i
1
i
k
k
k 1 , α
1
1
min
j n μ k 1 , l j ,
max
1
j n ν k 1 , l j
1
σ max (
A
,
l 0 ) =
,
.
.
m
m
k m , α
min
n μ k m , l j ,
max
1
n ν k m , l j
1
j
j
(ave,max)-column-aggregation
j = 1 α
n
j = 1 β
n
1
n
l
1
n
l
l 0 ,
j ,
j
k
k
k 1 , α
1
1
max
1
n μ k 1 , l j ,
min
n ν k 1 , l j
σ max (
A
,
l 0 ) =
,
j
1
j
.
.
m
m
k m , α
max
j n μ k m , l j ,
min
j n ν k m , l j
1
1
(ave,ave)-column-aggregation
σ max (
,
l 0 )
A
j = 1 α
n
j = 1 β
n
1
n
l
1
n
l
l 0 ,
j ,
j
j = 1 μ k 1 , l j ,
j = 1 ν k 1 , l j
n
n
k
k
1
n
1
n
k 1 , α
1
1
=
.
.
.
j = 1 μ k m , l j ,
n
j = 1 ν k m , l j
n
k
k
1
n
1
n
k m , α
m
m
 
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