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    National Tsing Hua University Institutional Repository > 電機資訊學院 > 資訊工程學系 > 期刊論文 >  An adaptive recommendation system without explicit acquisition of user relevance feedback

    Please use this identifier to cite or link to this item: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/67275

    Title: An adaptive recommendation system without explicit acquisition of user relevance feedback
    Authors: Shahabi, Cyrus;Chen, Yi-Shin
    教師: 陳宜欣
    Date: 2003
    Publisher: Springer Verlag
    Relation: DISTRIBUTED AND PARALLEL DATABASES,Volume 14,Issue 2,Pages 173-192,SEP 2003
    Keywords: Management information systems
    Electronic commerce
    Learning systems
    Genetic algorithms
    Abstract: Recommendation systems are widely adopted in e-commerce businesses for helping customers locate products they would like to purchase. In an earlier work, we introduced a recommendation system, termed Yoda, which employs a hybrid approach that combines collaborative filtering (CF) and content-based querying to achieve higher accuracy for large-scale Web-based applications. To reduce the complexity of the hybrid approach, Yoda is structured as a tunable model that is trained off-line and employed for real-time recommendation on-line. The on-line process benefits from an optimized aggregation function with low complexity that allows the real-time aggregation based on confidence values of an active user to pre-defined sets of recommendations. In this paper, we extend Yoda to include more recommendation sets. The recommendation sets can be obtained from different sources, such as human experts, web navigation patterns, and clusters of user evaluations. Moreover, the extended Yoda can learn the confidence values automatically by utilizing implicit users' relevance feedback through web navigations using genetic algorithms (GA). Our end-to-end experiments show while Yoda's complexity is low and remains constant as the number of users and/or items grow, its accuracy surpasses that of the basic nearest-neighbor method by a wide margin (in most cases more than 100%). The experimental results also indicate that the retrieval accuracy is significantly increased by using the GA-based learning mechanism.
    URI: http://www.springerlink.com/
    Appears in Collections:[資訊工程學系] 期刊論文

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