个性化推荐系统技术进展

Techniques for Recommendation System:A Survey

推荐系统通过获取用户的历史行为数据,如网页的浏览数据、购买记录、社交网络信息、用户地理位置等,来推断用户偏好。随着计算机技术的发展,推荐系统所采用的推荐技术由早期的基于用户-项的数据矩阵分解技术为主,逐渐向与数据挖掘、机器学习、人工智能等技术相融合的方向发展,从而深度挖掘用户行为的潜在偏好,以构建更加精准的用户偏好模型。推荐过程也从静态预测发展到实时推荐,通过与用户实时交互来使推荐结果更加丰富。文中重点回顾了推荐系统在不同时期所采用的关键技术,主要包括基于内容过滤的推荐技术、基于协同过滤的推荐技术、基于深度学习的推荐技术、基于强化学习的推荐技术和基于异构网络的推荐技术等。最后对比和分析了关键技术的优缺点,并对推荐系统的未来发展进行展望。

The recommendation system obtains users’historical behavior data to predict their preferences,such as web browsing data,purchase records,social network information,users’geographical location and so on.With the development of computer technology,the recommendation technology is mainly based on user-item data matrix decomposition technology in the early stage.Afterwards,it is gradually integrated with data mining,machine learning,artificial intelligence and other technologies,so as to deeply mine the potential preferences of user behavior and build a more accurate user preference model.The recommendation process also moves from static prediction to real-time recommendation,enriching the recommendation results through real-time interaction with users.This paper mainly reviews the key technologies adopted by the recommendation system in different periods,including content-based filtering technology,collaborative filtering technology,recommendation technology based on deep learning,recommendation technology based on reinforcement learning,recommendation technology based on heterogeneous information network.Finally,this paper analyzes the advantages and disadvantages of key technologies,and then looks forward to the future development of the recommendation system.