Learning to Recommend Questions Based on User Ratings Ke Sun, Yunbo Cao, Xinying Song, Young-In...

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Learning to Recommend Learning to Recommend Questions Based on User Questions Based on User Ratings Ratings Ke Sun, Yunbo Cao, Xinying Song, Young-In Song, Xiaolong Wang and Chin-Yew Lin. In Proceeding of the 18th ACM Conference on Information and Knowledge Management (Hong Kong, China, November 02 - 06, 2009). Prepared and Presented by Baichuan Li

Transcript of Learning to Recommend Questions Based on User Ratings Ke Sun, Yunbo Cao, Xinying Song, Young-In...

Page 1: Learning to Recommend Questions Based on User Ratings Ke Sun, Yunbo Cao, Xinying Song, Young-In Song, Xiaolong Wang and Chin-Yew Lin. In Proceeding of.

Learning to Recommend Learning to Recommend Questions Based on User Questions Based on User

RatingsRatings

Ke Sun, Yunbo Cao, Xinying Song,

Young-In Song, Xiaolong Wang and Chin-Yew Lin.

In Proceeding of the 18th ACM Conference on Information and Knowledge Management 

(Hong Kong, China, November 02 - 06, 2009).

Prepared and Presented by Baichuan Li

Page 2: Learning to Recommend Questions Based on User Ratings Ke Sun, Yunbo Cao, Xinying Song, Young-In Song, Xiaolong Wang and Chin-Yew Lin. In Proceeding of.

OutlineOutlineIntroductionProblem StatementAlgorithmsExperimentsConclusion

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IntroductionIntroductionCommunity-Based Question-

Answering (CQA) Services

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Finding AnswersFinding Answers

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Query

Existed similar

questions and their answers

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Finding QuestionsFinding Questions

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Sort by popularity

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PROBLEM PROBLEM STATEMENTSTATEMENT

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RecommendationRecommendation

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Preference Preference OOrderrder

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Ordered PairsOrdered Pairs

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Page 10: Learning to Recommend Questions Based on User Ratings Ke Sun, Yunbo Cao, Xinying Song, Young-In Song, Xiaolong Wang and Chin-Yew Lin. In Proceeding of.

Ranking FunctionRanking Function

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Page 11: Learning to Recommend Questions Based on User Ratings Ke Sun, Yunbo Cao, Xinying Song, Young-In Song, Xiaolong Wang and Chin-Yew Lin. In Proceeding of.

PrinciplePrinciple

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ALGORITHMSALGORITHMS

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Page 13: Learning to Recommend Questions Based on User Ratings Ke Sun, Yunbo Cao, Xinying Song, Young-In Song, Xiaolong Wang and Chin-Yew Lin. In Proceeding of.

The Perceptron Algorithm for The Perceptron Algorithm for Preference Learning (PAPL)Preference Learning (PAPL)

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Page 14: Learning to Recommend Questions Based on User Ratings Ke Sun, Yunbo Cao, Xinying Song, Young-In Song, Xiaolong Wang and Chin-Yew Lin. In Proceeding of.

The Majority-Based The Majority-Based Perceptron Algorithm (MBPA)Perceptron Algorithm (MBPA)

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EXPERIMENTSEXPERIMENTS

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DatasetDataset297,919 questions under ‘travel’

category at Yahoo! Answers

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Dataset (Cont.)Dataset (Cont.)

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Dataset (Cont.)Dataset (Cont.)

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Page 19: Learning to Recommend Questions Based on User Ratings Ke Sun, Yunbo Cao, Xinying Song, Young-In Song, Xiaolong Wang and Chin-Yew Lin. In Proceeding of.

ResultsResultsEvaluation Measure

◦Error rate of preference pairs

Result

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Results (Cont.)Results (Cont.)

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ConclusionConclusionInvestigated the problem of

learning to recommend questions based on user ratings◦Enlarged the size of available

training data through adding questions without user rating

◦Demonstrated the approach’s effectiveness through intensive experiments

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