摘要： 毕设里面要用到个性化的信息推荐，因此接触到Recommender system。了解一个事物，总是从wikipedia开始。Recommender systems is a subclass of information filtering system that seek to predict the 'rating' or 'preference' that a user would give to an item (such as music, books, or movies) or social element (e.g. people or grou 阅读全文