【目的/意義】基于層次粗糙集的突發事件檢索模型為不同層次的應急管理人員提供具有不同粒度的檢索需求,提高應急案例檢索的科學性和準確性,在應急響應決策中發揮重要作用。【方法/過程】根據突發事件的類型提取出突發事件屬性特征并進行合理地表示;分析突發事件特征屬性,構建突發事件屬性概念層次樹,建立各個屬性值的空間結構關系;采用層次粗糙集技術構建突發事件多粒度檢索模型。【結果/結論】所構建突發事件檢索模型注重用戶查詢的抽象度與模糊性,可以實現不同粒度的檢索需求,為制定應急預案和突發事件快速響應提供信息支持。

【Purpose/significance】The emergency retrieval model based on hierarchical rough set can meet the needs of different levels of retrieval requirements for people, improve the scientificity and accuracy of emergency case retrieval, and play an important role in emergency response decision-making.【Method/process】Firstly, according to the types of emergencies, the attributes of emergencies are extracted and represented reasonably; Secondly, we analyze the attributes of emergencies, construct the hierarchical tree of emergency attribute concept, and establish the spatial structure relationship of attribute value; Finally, the hierarchical rough set technology is used to construct the multi granularity retrieval model for emergencies.【Result/conclusion】The emergency retrieval model focuses on the abstraction and fuzziness of user queries,and realizes the retrieval requirements of different granularity. It provides information support for making emergency plans and quick response of emergencies.