时空知识图谱的构建与应用

Construction and Application of Spatiotemporal Knowledge Graph

提出一种时空知识图谱本体模型,通过在实体中加入时空属性信息,实现对特定目标领域时空数据的管理和查询。为检测该模型的实际应用价值,设计并实现了特定目标领域时空知识图谱问答系统。该系统可较准确地查询出某时刻或时间段内的实体关系情况,且可以在一定程度上进行空间距离的计算。同时可使自然语言问句在转换为SQL的过程中绕开复杂的语义依赖树,使转换过程更加高效。系统测试结果表明,该系统对特定目标领域上的数据分析具有较大的应用价值。

This paper proposes a spatiotemporal ontology model of knowledge graph,the model is implemented by adding spatiotemporal attribute information to entities to manage and query spatiotemporal data.At the same time,in order to test the practical application value of the model,we design and implement a question answering system of the spatiotemporal knowledge graph.The system can accurately query the entity relationship in a certain time or a period of time and calculate the spatial distance to a certain extent.Furthermore,the system can convert natural language questions into SQL without complex semantic dependency tree,making the conversion process more efficient.The test result shows that the system has great application value for data analysis in some fields.