Improving Neighborhood-based CF Systems : Towards More Accurate and Diverse Recommendations추천의 정확도 및 다양성 향상을 위한 이웃기반 협업 필터링 추천시스템의 개선방안
- Other Titles
- 추천의 정확도 및 다양성 향상을 위한 이웃기반 협업 필터링 추천시스템의 개선방안
- Authors
- 권영옥
- Issue Date
- Sep-2012
- Publisher
- 한국지능정보시스템학회
- Keywords
- 추천 정확도; 이웃기반; 협업 필터링; 추천시스템; Recommendation; Collaborative Filtering; Neighborhood-Based; Accuracy; Diversity; Similarity
- Citation
- 지능정보연구, v.18, no.3, pp 119 - 135
- Pages
- 17
- Journal Title
- 지능정보연구
- Volume
- 18
- Number
- 3
- Start Page
- 119
- End Page
- 135
- URI
- https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/12154
- ISSN
- 2288-4866
2288-4882
- Abstract
- Among various recommendation techniques, neighborhood-based Collaborative Filtering (CF) techniques have been one of the most widely used and best performing techniques in literature and industry. This paper proposes new approaches that can enhance the neighborhood-based CF techniques by identifying a few best neighbors (the most similar users to a target user) more accurately with more information about neighbors. The proposed approaches put more weights to the users who have more items co-rated by the target user in similarity computation, which can help to better understand the preferences of neighbors and eventually improve the recommendation quality. Experiments using movie rating data empirically demonstrate simultaneous improvements in both recommendation accuracy and diversity. In addition to the typical single rating setting, the proposed approaches can be applied to the multi-criteria rating setting where users can provide more information about their preferences, resulting in further improvements in recommendation quality. We finally introduce a single metric that measures the balance between accuracy and diversity and discuss potential avenues for future work.
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