2. Features of recommender systems

Typically, the recommendation process starts when the users show their views/preferences by rating items, as shown in Fig. 7.1. The necessary postulation of RSs is that if users Pimage and Qimage prefer nimage corresponding products, it is likely they possess comparable behaviors (e.g., viewing, purchasing, and listening), so they will act or turn to further items correspondingly. RS methods use a data store of the users' preferences ...

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