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中文摘要：
为解决当前新产品设计过程中不能准确获取产品设计知识的问题，提出基于本体的产品设计知识检索技术。首先，通过“产品设计本体-索引目录-产品设计外部资源”三层结构表达设计知识，形成以索引库目录为引导方向、产品设计本体与产品设计外部资源相互映射的设计知识体系。其次，提出了基于编辑距离算法的相似度匹配方法，在对检索问题进行自然语言处理基础上，利用编辑距离相似度算法将其转换成本体概念，并构造相应的SPARQL检索语言，检索出符合设计人员检索意图的设计知识。最后，以国防领域中自行火炮设计知识为例验证知识检索技术的可行性。
英文摘要：
In order to solve the problem that cannot accurately obtain the knowledge of product design in the process of new product design, this paper proposes the technology of product design knowledge retrieval based on ontology. Firstly, the paper represents the design knowledge through the three layer structure of ＂product design ontology-index catalog-product design external sources＂, and forms the design knowledge system, which includes the index catalog as the guiding direction and the mutual mapping of the product design ontology and product design external sources. Then, the paper puts forward the similarity matching method based on edit distance algorithm. On the basis of the natural language processing for retrieval problem, the paper uses the edit distance similarity algorithm to convert the retrieval problem into the concept of ontology, and constructs the corresponding SPARQL retrieval language to retrieve the design knowledge that complies with the retrieval intention of designers. Finally, the paper uses the design knowledge of auxiliary-propelled gun in the field of national defense as an example to reveal the feasibility of the technology of knowledge retrieval.
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