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Copyright © 2014 OPT, Inc. All Rights Reserved.
~ ~
Scala
2
• 10/2( )19:30~
•
3
Web
AI
Google AlphaZero
4
Copyright © 2014 OPT, Inc. All Rights Reserved.
Web
Web
AI
Google AlphaZero
ROI
6
A/B
N
7
- CPA( = Cost / CV ) CTR ( = CLICK / )
- ( )
8
Copyright © 2014 OPT, Inc. All Rights Reserved.
Web
AI
Google AlphaZero
-
10
1. (A/B )
2.
3.
11
A/B
exploitation exploration
- ←
- ←
- AB ←
- ←
12
A/B
Copyright © 2014 OPT, Inc. All Rights Reserved.
Web
AI
Google AlphaZero
Copyright © 2014 OPT, Inc. All Rights Reserved.
ε-Greedy
 
14
- ( MCMC SA )
- n
※
-
( → ∞ ) → 1/n
( → 0 )
Softmax 15
UCB
(Softmax
)
UCB1
16
Copyright © 2014 OPT, Inc. All Rights Reserved.
Web
AI
Google AlphaZero
(UCB)
UCB
(CTR)
40%
18
CTR
python scikit-learn
( )
github
https://github.com/johnmyleswhite/BanditsBook
(
http://qiita.com/ysekky/items/4e782603f7592743625b
19
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AI
Web
AI
Google AlphaZero
0 1
21
…
tannsaku
22
•  
-
-
-
23
1.
2.
( )
http://www.slideshare.net/TakashiKato2/ss-57966067
2
( )
( )
24
Minimax
(ε-Greedy )
(Softmax )
※
[1] [15]
http://labs.timedia.co.jp/author/author3a1b5/
25
Copyright © 2014 OPT, Inc. All Rights Reserved.
.Google AlphaZero
Web
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Google AlphaZero
(αβ )
1. UCB1
2.
GoogleAlphaZero 27
Google AlphaZero
1.
-
2.
- AlphaZero
- ( )
3.
- 1/1000
- elmo: 3500 / , AlphaZero: 4 /
-
- 1 3 /
28
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