归并不同证据资源扩展用于信息检索的信念网络是当前一个重要的研究方向。以同义词为证据扩展基本信念网络模型,得到一个扩展的信念网络检索模型。实验证明,扩展模型的检索性能优于基本模型。 Merging different sources of evidence to expand the belief network used for information retrieval is currently an important research direction. Extend the basic belief network model with the evidence of synonym to get an extended belief network retrieval model. Experiments show that the retrieval performance of the extended model is better than the basic model.