16th AIAI 2020, 5 -7 June 2020, Greece

Promoting Diversity in Content Based Recommendation using Feature Weighting and LSH

Dimosthenis Beleveslis, Christos Tjortjis


  This work proposes an efficient Content-Based (CB) product recommenda-tion methodology that promotes diversity. A heuristic CB approach incorpo-rating feature weighting and Locality-Sensitive Hashing (LSH) is used, along with the TF-IDF method and functionality of tuning the importance of prod-uct features to adjust its logic to the needs of various e-commerce sites. The problem of efficiently producing recommendations, without compromising similarity, is addressed by approximating product similarities via the LSH technique. The methodology is evaluated on two sets with real e-commerce data. The evaluation of the proposed methodology shows that the produced recommendations can help customers to continue browsing a site by provid-ing them with the necessary “next step”. Finally, it is demonstrated that the methodology incorporates recommendation diversity which can be adjusted by tuning the appropriate feature weights.  

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