基于交叉效率的应急案例检索方法

为了解决应急方案搜索客观性及属性权重确定困难的问题,建立一种基于交叉效率的应急案例检索方法.首先,应用欧氏距离度量目标案例与历史案例的属性相似度;然后,通过数据包络分析中的CCR交叉效率模型测量案例相似度,同时历史案例应急方案的实施效果也应用CCR交叉效率模型进行评估,进而集结案例相似度和应急方案实施效果得到案例的综合评价值,目标案例的应急方案为综合评价值最大的历史案例的应急方案;最后,通过一个高层建筑火灾案例验证所提出方法的可行性和有效性.

Emergency case retrieval method based on cross-efficiency

To resolve the problems of the objectivity of emergency case retrieval and the difficulty of determining the weights of attributes, an emergency case retrieval method is proposed based on the cross-efficiency evaluation.Firstly, the similarity degrees of attributes between the target case and the historical cases are measured for each attribute by using Euclidean distances.Then, the similarity degrees of cases are measured by using the CCR cross-efficiency model in data envelopment analysis.Emergency implementation effects of historical cases are also assessed by using CCR cross-efficiencies. The overall evaluation values of historical cases are the integrations of their similarity degrees of cases and emergency implementation effects.The emergency alternative for target case is the historical one with the maximum overall evaluation value.Finally, a fire example of high-rise building is used to verify the feasibility and effectiveness of the proposed method.