知识引导的滑坡灾害场景动态表达方法

Knowledge-Guided Dynamic Representation Method of Landslide Disaster Scene

滑坡灾害虚拟场景对灾情信息理解具有重要意义。但现有的滑坡灾害场景存在建模操作复杂、可读性差等问题。针对上述问题,研究知识引导的滑坡灾害场景动态表达,探讨滑坡灾害场景内容、模型与表达特征及相互关系,建立滑坡灾害场景建模的多层次语义约束规则,提出了知识引导的滑坡灾害场景动态表达方法。在此基础上,研发原型系统并开展案例实验与分析。实验结果表明,所提方法能够通过知识引导简化建模操作过程,快速构建滑坡灾害场景,实现灾害成因、发展及影响全过程的动态表达,能更有效地帮助用户全面地理解滑坡灾害。

Objective:As a frequent geological disaster,landslide is very sudden,destructive and easy to cause secondary disasters,which brings great threat to human life and property.It is very important to construct the virtual scene of landslide disaster for understanding the information of landslide disaster to assist emergency decision making.However,the existing landslide scene modeling has some shortcomings,such as complex operation,information readability and so on.Therefore,we propose a knowledge-guided dynamic expression method of landslide disaster scene.Methods:We adopt the knowledge-guided method to construct the landslide disaster scene.Firstly,we explore the content,model and expression features of landslide disaster scene as well as their interrelations.Then,we establish hierarchical semantic constraint rules of landslide disaster scene modeling,including the information completeness constraint rules,the spatial semantic constraint rules,the information readability constraint rules and the logical relationship constraint rules.Finally,the above rules are used to construct the knowledge template of landslide disaster modeling.Under the guidance of the knowledge template,the dynamic expression of the whole process of landslide disaster is realized.The prototype system is implemented,and a case experiment analysis is performed using the 10·11 Jinshajiang landslide and 6·24 Maoxian landslide as examples.Results:Under the guidance of knowledge,the important information of landslide disaster,such as geological structure,historical disaster,meteorological conditions,disaster process and disaster situation,is selected,and the elements such as text,abstract symbols,animation and visual variables were integrated to realize the dynamic expression of the whole process of landslide disaster from cause,process to impact.Conclusions:The experimental results show that the dynamic expression method of knowledge-guided landslide disaster scene can simplify the complex modeling operation,quickly construct landslide disaster scene,have rich expression content,good visualization effect,complete disaster process,clear disaster information,and help users to understand landslide disaster more effectively.