project page zero, smart search, learning to personalize suggestions
DESCRIPTION
Suggestions, Search, Learning to RankTRANSCRIPT
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Project PageZeroSmart Search
Antonio Gulli
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Search transformed the way we look at the world
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Search box:Looking at the world through a window
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Satori: Entering the World of Entities
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Words are ambiguous
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Sites
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Bing uses the world of entities as soon as you type. Not only for refining search results
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Smart Search
Windows 8.1World Wide
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SkyDrive Xbox Web
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Personalized Results Email Skype
Local Files
Web
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Learning to Personalize Query Auto-Completion
Milad ShokouhiMicrosoft
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Relevance Labelling for Contextual Search
•For learning we need labels.•Relevance labelling for contextual (personalized) search
(auto-completion) is not trivial.•Previous work on personalized search [Fox et al., 2005]• Samples search impressions from the logs•Documents with SAT clicks are annotated with relevant labels.• The goal is to learn a re-ranking model that improves the
ranking of those relevant documents given the context.
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Analogy: Auto-Completion Labels
34
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Experimental Settings
• Ranker: Lambda-Mart [Burges et al., 2011] • AOL testbed• 657K users (Mar-May 2006)• 128,620 queries in the prefix-tree• Userid, query, timestamp
• Bing testbed• 196K logged in users with Microsoft LiveID (Jan-2013)• 699,862 queries in the prefix-tree• Userid, query, timestamp, age, gender, zip code
• Training & testing on different sets of users
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Personalized Ranking Features
• Demographics• Age (5 groups)• Gender (2 groups)• Zip-code (10 groups)
• Search history• Short (session)• Long (all past queries)
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Personalization by Age
Testbed Baseline Personalized MRR (Gain/Loss)
Bing (age) - - +3.80%
The effectiveness of auto-completion personalization according to the user’s age in terms of MRR. All differences are statistically significant (P < 0.01)
Below 20 21-30 31-40 41-50 Above 50
Frequently promoted suggestions for different age groups
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Results Summary
Features AOL BingShort history +1.95% 0.91%Long history +4.45% 5.57%Age - 3.80%Gender - +3.59%Location - +4.58%All +6.45% +9.42%
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London
Twitter: @gulliantonio
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