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Clustering approach based on feature weighting for recommendation system in movie domain

机译:电影领域推荐系统中基于特征加权的聚类方法

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摘要

The advancement of the Internet has brought us into a world that represents a huge amount of information items such as movies, web pages, etc. with fluctuating quality. As a result of this massive world of items, people get confused and the question “Which one should I select?” arises in their minds. Recommendation Systems address the problem of getting confused about items to choose, and filter a specific type of information with a specific information filtering technique that attempts to present information items that are likely of interest to the user. A variety of information filtering techniques have been proposed for performing recommendations, including contentbased and collaborative techniques which are the most commonly used approaches in recommendation systems. This dissertation introduces a new recommendation model, a feature weighting technique to cluster the user for recommendation top-n movies to avoid new user cold start and scalability problem. The distinctive point of this study lies in the methodology used to cluster the user and the methodology which is utilized to recommend movies to new users. The model makes it possible for the new users to define a weight for every feature of movie based on its importance to the new user in scale of one (with an increment of 0.1). By using these weights, it finds nearest cluster of users to the new user and suggests him the top-n movies (with the highest rate and most frequency) which are reviewed by users that are in the targeted cluster. Rating and Movie dataset were are used during this study. Firstly, purity and entropy are applied to evaluate the clusters and then precision, recall and F1 metrics are used to assess the recommendation system. Eventually, the results of accuracy testing of proposed model are compared with two traditional models (OPENMORE and Movie Magician Hybrid) and based on the evaluation the level of preciseness of the proposed model is more better than Movie Magician Hybrid but worse than OPENMORE.
机译:Internet的发展使我们进入了一个世界,该世界代表着质量波动的大量信息项,例如电影,网页等。由于存在如此庞大的物品世界,人们感到困惑,并提出了一个问题:“我应该选择哪个?”在他们的脑海中浮现。推荐系统解决了使选择项目困惑的问题,并使用一种特定的信息过滤技术来过滤特定类型的信息,该技术试图呈现用户可能感兴趣的信息项目。已经提出了用于执行推荐的各种信息过滤技术,包括基于内容的和协作技术,它们是推荐系统中最常用的方法。本文介绍了一种新的推荐模型,一种特征加权技术,可以将用户聚集在推荐的前n部电影中,从而避免了新用户的冷启动和可扩展性问题。这项研究的独特之处在于用于对用户进行聚类的方法以及用于向新用户推荐电影的方法。该模型使新用户可以基于电影对每个新功能的重要性(以0.1为增量)为影片定义每个功能的权重。通过使用这些权重,它可以找到与新用户最接近的用户群,并向他建议目标群体中的用户查看的前n部电影(具有最高的频率和最多的频率)。在这项研究中使用了评级和电影数据集。首先,使用纯度和熵评估聚类,然后使用精度,召回率和F1指标评估推荐系统。最终,将提出的模型的准确性测试结果与两个传统模型(OPENMORE和Movie Magician Hybrid)进行比较,并根据评估结果,提出的模型的准确性水平比Movie Magician Hybrid更好,但比OPENMORE差。

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