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行列分解いろいろ
1.
1
2.
■ Matrix Factorization ■
Context-Aware MF ■ Factorization Machines ■ Bayesian Probabilistic Matrix Factorization ■ Bayesian Personalized Ranking 2
3.
Matrix Factorization ■ User-item –
user item ■ Matrix Factorization user item 3 × User-item User Item
4.
Matrix Factorization ■ user
item user item ■ SGD 4 × Vector dimension k
5.
Matrix Factorization ■ user
item 5 User a Item 2 Item 3 User user Item item User d
6.
Matrix Factorization 6 User a Item
2 Item 3 User Item user item User d user item ■ user item
7.
Matrix Factorization 7 User a Item
2 Item 3 User user User d User a Item 2 Item 3 User d Item item
8.
Matrix Factorization ■ 8 • k • User
: Item :
9.
Matrix Factorization 9 U R V ! " #$ % #& % #%
10.
Matrix Factorization 10 U R V ! " #$ % #& % #% User
11.
Matrix Factorization 11 U R V ! " #$ % #& % #% Item
12.
Matrix Factorization 12 U R V ! " #$ % #& % #%
13.
Matrix Factorization ■ 13 SVD
14.
Matrix Factorization ■ 14 ! " 1
0 #$ %&
15.
Matrix Factorization ■ 15
16.
Convolutional Matrix Factorization for
Document Context-Aware Recommendation Donghyun Kim, Chanyoung Park, Jinoh Oh, Sungyoung Lee, Hwanjo Yu 16 2016, RecSys
17.
ConvMF ■ Item ■ Item 17 …
18.
ConvMF 18 U R V ! " #$ % #& % #% ' X W #( %
19.
ConvMF 19 U R V ! " #$ % #& % #% ' X W #( % MF CNN
20.
ConvMF 20 U R V ! " #$ % #& % #% ' X W #( % CNN
21.
ConvMF 21 U R V ! " #$ % #& % #% ' X W #( % Item
22.
ConvMF 22 CNN 4 1. Embedding
layer 2. Convolution layer 3. Pooling layer 4. Output layer
23.
ConvMF 1. Embedding layer 23 Document !!
− 1 ! + 1 n n Glove 2
24.
ConvMF 2. Convolutional layer 24 ! … Document
Matrix Window size "# 1 1 Contextual feature $%
25.
ConvMF 3. Pooling layer 25 n
Contextual feature n Document max-pooling
26.
ConvMF 4. Output layer 26 User
& Item !
27.
ConvMF ■ 27 SGD + Back-prop
28.
ConvMF ■ 28 CNN
29.
ConvMF ■ 29 u u p PMF
: p CTR : PMF + LDA p CDL : PMF + SDAE p ConvMF : p ConvMF+ : Glove
30.
ConvMF ■ 30 RMSE
31.
ConvMF ■ ■ 31
32.
Factorization Machines Steffen Rendle 32 2010,
IEEE International Conference on Data Mining
33.
FMs ■ Matrix Factorization ■
MF User Item – 33
34.
FMs ■ 34 1. User Item Time
Rating 2. one-hot encoding User Item Time Rating
35.
FMs ■ 35
36.
FMs ■ 36
37.
FMs ■ 37 User Item
38.
FMs ■ Alice Titanic
2010 1 38
39.
FMs 39 Alice Titanic 2010 1
/
40.
FMs 40 Alice Titanic Alice Titanic Alice
2010 1 Titanic 2010 1
41.
FMs ■ 41 ! … " … " !
42.
FMs ■ – 3 – Ranking
Binary Classification – Field-Aware Factorization Machines 42 [1] [1] Field-Aware Factorization Machines for CTR Prediction Y. Juan, Y. Zhuang, W. -S. Chin, C. -J. Lin 2016, RecSys
43.
FMs ■ Domain-specific – Matrix
Factorization / Tensor decomposition – SVD++ – Pairwise Interaction Tensor Factorization – Factorized Personalized Markov Chains or 43
44.
Bayesian Probabilistic Matrix Factorization
using Markov Chain Monte Carlo Ruslan Salakhutdinov, Andriy Mnih 44 2008, ACM
45.
BPMF ■ Matrix Factorization
User Item !" # !$ # ■ ■ ■ – – – 45
46.
BPMF 46 U R V ! " #$ Λ& Λ' (& ('() *),
,) *), ,) ()
47.
BPMF 47 U R V ! " #$ Λ& Λ' (& (' )*,
,* )*, ,* (* (* User
48.
BPMF 48 U R V ! " #$ Λ& Λ' (& (' )*,
,* )*, ,* (* (* User
49.
BPMF ■ MCMC Gibbs
sampling … ■ ■ 49
50.
BPMF ■ 50 u u p Netflix baseline
: Netflix p SVD p PMF p Logistic PMF : 0~1 p Bayesian PMF :
51.
BPMF ■ 51
52.
BPMF ■ 52
53.
BPMF ■ User Item 53
54.
BPMF ■ User Item 54
55.
Bayesian Personalized Ranking from
Implicit Feedback Steffen Rendle, Christoph Freudenthaler, Zeno Gantner, Lars Schmidt-Thieme 55 2009, UAI
56.
BPR ■ Matrix Factorization ■ ■ 56
57.
BPR ■ BPR 57
58.
BPR ■ BPR 58 Θ " # $ " #
$
59.
BPR ■ 59 BPR
60.
BPR ■ 60
61.
BPR ■ MF 61
62.
BPR ■ AUC 62 AUC 0.94 0.77 0.49 0.26 1 1 1 0 … … 1.
63.
BPR ■ AUC 63 3. AUC AUC 2.
1 0
64.
BPR ■ AUC 64 AUC 0.94 0.77 0.49 0.26 1 1 1 0 … … … 0 1 1→0 0→1
65.
BPR ■ AUC 65
66.
BPR ■ AUC 66 ! " # BPR
67.
BPR ■ 67 u u p WR-MF :
1 [0, 1] p SVD-MF p Cosine-kNN p most popular : p np_max :
68.
BPR ■ 68 AUC
69.
Reference ■ ■ Donghyun Kim,
Chanyoung Park, Jinoh Oh, Sungyoung Lee, Hwanjo Yu. Convolutional Matrix Factorization for Document Context-Aware Recommendation, 2016, RecSys ■ Steffen Rendle. Factorization Machines, 2010, IEEE International Conference on Data Mining ■ Ruslan Salakhutdinov, Andriy Mnih. Bayesian Probabilistic Matrix Factorization using Markov Chain Monte Carlo, 2008, ACM ■ Steffen Rendle, Christoph Freudenthaler, Zeno Gantner, Lars Schmidt-Thieme. Bayesian Personalized Ranking from Implicit Feedback, 2009, UAI 69
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