Aprendizado de Máquina e Visualização de Informação para otimização de Sistemas de...
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Transcript of Aprendizado de Máquina e Visualização de Informação para otimização de Sistemas de...
Robson Motta | [email protected]
Aprendizado de Máquina e Visualização de Informaçãopara otimização de Sistemas de Recomendação
recommendations
data
preprocessing
processing
postprocessing
● products● pageviews● clicks● buyorders
etc.
Collaborative Filtering
1
Customers Who Bought This Item Also Bought, PaulsHealthBlog.com, 11.04.2014
How do weguarantee qualityto our clients?
● subjective evaluation: Visualization● objective evaluation: Quality measures● online evaluation: A/B test● online optimization: Bandit
Content-based Filtering
2
frequency of term n in document d
IDF factor ofterm n
weight of term nwithin document d
… main issues
false positives(pair of products wrongly
assigned to the same cluster)
false negatives(pair of products wrongly
assigned to different clusters)
Clustering
3
Bandit - Beta Distribution
http://www.distributome.org/js/sim/BetaSimulation.html
0 success and10 attempts
0 success and0 attempts
5 success and10 attempts
http://www.distributome.org/js/sim/BetaSimulation.html
0 success and10 attempts
0 success and0 attempts
5 success and10 attempts
Bandit - Beta Distribution
http://www.distributome.org/js/sim/BetaSimulation.html
0 success and10 attempts
0 success and0 attempts
5 success and10 attempts
Bandit - Beta Distribution
0 success and10 attempts
0 success and0 attempts
5 success and10 attempts
Bandit - Thompson Sampling
http://www.distributome.org/js/sim/BetaSimulation.html
Bandit - Thompson Sampling
success and attempts: [(0, 10), (0, 7), (0, 7), (0, 6), (0, 4), (0, 3), (0, 4), (0, 3), (0, 0), (0, 0), ...
success and attempts: [(1, 44), (10, 398), (0, 66), (1, 57), (2, 25), (14, 324), (0, 3), (1, 46), ...
Bandit - Thompson Sampling
success and attempts: [(103, 1183), (64, 1138), (48, 900), (25, 524), (56, 527), (37, 546), (11, 216), …
success and attempts: [(143, 2227), (8, 299), (119, 1706), (28, 889), (146, 1288), (86, 1646), (63, 1272) ...
Robson [email protected]