p
a
r
a
m
e
t
e
r
α
1
.
8
2
5
p
a
r
a
m
e
t
e
r
β
1
.
9
4
5
m
e
a
n
:
α
β
=
3
.
5
5
0
v
a
r
i
a
n
c
e
:
α
2
β
=
6
.
9
0
4
m
o
m
e
n
t
g
e
n
e
r
a
t
i
n
g
f
u
n
c
t
i
o
n
:
-
α
(
1
-
β
t
)
=
1
1
.
8
2
5
(
1
-
(
1
.
9
4
5
+
0
.
)
t
)