LDA模型在微博用户推荐中的应用

摘要

Latent Dirichlet Allocation(LDA) model can be used for identifying topic information from large-scale document set, but the effect is not ideal for short text such as microblog. This paper proposes a microblog user model based on LDA, which divides microblog based on user and represents each user with their posted microbolgs. Thus, the standard three layers in LDA model by document-topic-word becomes a user model by user-topic-word. The model is applied to user recommendation. Experiment on real data set shows that the new provided method has a better effect. With a proper topic number, the performance is improved by nearly 10%.%潜在狄利克雷分配(LDA)主题模型可用于识别大规模文档集中潜藏的主题信息，但是对于微博短文本的应用效果并不理想。为此，提出一种基于LDA的微博用户模型，将微博基于用户进行划分，合并每个用户发布的微博以代表用户，标准的文档-主题-词的三层LDA模型变为用户-主题-词的用户模型，利用该模型进行用户推荐。在真实微博数据集上的实验结果表明，与传统的向量空间模型方法相比，采用该方法进行用户推荐具有更好的效果，在选择合适的主题数情况下，其准确率提高近10%。