3. 読んだ論文
• FLAME: Probabilistic Model Combining Aspect
Based Opinion Mining and Collaborative
Filtering
• Yao Wu / Matin Ester
• collaborative filtering -> opinion mining
• large geo DB -> spatial data mining
• Review Mining using LDA like method
Thursday, May 14, 15
6. 先行研究
• Collaborative Filtering + LDA (science articles)
• Wang & Blei 2011
↵ ✓ z w
rv
u u
N K
J
I
v
rij ⇠ N(uT
i vj, cij1)
✓j ⇠ Dirichlet(↵) wjn ⇠ Mult( zjn
)
rij 2 {0, 1}
r : overall rating
v : latent item distribution
u : latent user preference
Thursday, May 14, 15
7. 先行研究
• Aspect-based Opinion Mining (hotel review)
• Wang et al. 2010
⌃
µ
↵
2
s wr
D
K
r : overall rating
s : aspect rating
Thursday, May 14, 15
10. 提案モデル
i,a u
'd,a
✓d
rd
⌘0 ⌘u ⌘i
st
at
wn
a
a,r
W
T
D
A
A
IU
UI
R
A
p(wn|at, st, ↵) ⇠ Multi(↵at,st
)
↵a,s[j] =
exp( a[j] + a,s[j])
PV
l=1 exp( a[l] + a,s[l])
rd ⇠ N(
X
a
✓d[a]E[rd, a], 2
r )
E[rd, a] = T
u i,a
Thursday, May 14, 15
11. 提案モデル
i,a u
'd,a
✓d
rd
⌘0 ⌘u ⌘i
st
at
wn
a
a,r
W
T
D
A
A
IU
UI
R
A
p(wn|at, st, ↵) ⇠ Multi(↵at,st
)
↵a,s[j] =
exp( a[j] + a,s[j])
PV
l=1 exp( a[l] + a,s[l])
rd ⇠ N(
X
a
✓d[a]E[rd, a], 2
r )
E[rd, a] = T
u i,a
潜在ユーザ選好
語-アスペクトの相関
語,アスペクト,評価の相関
文ごとのアスペクト
文ごとの評価
アスペクトごとの評価分布
評価分布
評価の出やすさの潜在変数
アスペクト分布
Thursday, May 14, 15