期刊名称：International Journal of Computer Science and Information Technologies
电子版ISSN：0975-9646
出版年度：2014
卷号：5
期号：4
页码：5771-5772
出版社：TechScience Publications
摘要：Recommendation systems (RS) serve the right item to the user in an automated fashion to satisfy long term objective.Major task of the recommender system is to present recommendations to users. The task is usually conducted by first predicting a user’ s ratings for each item and then ranking all items in descending order.RS are the collaborative, query less discovery engines. They have become important area of research. There are many practical applications in this area. Each practical problem needs a different approach to cater to its dimension. This paper summarizes the various aspects of RS, problems /challenges. It also discusses certain issues specific to context-aware systems and the long tail problem of RS
