1.

2.
J(θ) = −
1
|S| ∑
s∈S
[(puc,a ⋅ log( ̂puc,a) + (1 − puc,a) ⋅ log(1 − ̂puc,a)
−λ ⋅ (puc,a ⋅ (1 − cos(euc, ea)) + (1 − puc,a) ⋅ cos(euc, ea))],
where cos(euc, ea) :=
cos(euc, ea) + 1
2
.

3.

4.

5.

6.

7.
50~
52~54
39~46
24~26 17~18
29~34
34~38

8.
female / 49 /
!
! 365
…
female / 25 /
10 !
, !
!
male / 48 /
?
,
!
female/ 49 /
,
,
ead
euser,context

9.