Based on a fuzzy matching model and a fuzzy evaluating model, a multi-layer model is provided for quantitative discription of the similarity at different layers.

• 该策略在模糊匹配模型和模糊评价模型基础上，通过建立多层次评价模型，定量描述实例在不同层次的相似性，综合评价选出最适当的实例。