Dynamic Scheduling Of Post-earthquake Emergency Materials Considering Secondary Disasters

The rescue of large-scale earthquake disasters is an important research topic in the field of emergency rescue.In recent years,earthquakes have frequently occurred in world,affecting infrastructure construction and economic development.Reasonable schedule of emergency materials has become the focus of research,in order to timely respond to sudden earthquake disasters and reduce losses.Earthquake disasters are often accompanied by secondary disasters.For the problem of emergency material scheduling under the evolution scenario of uncertain secondary disasters,the decision makers should consider it comprehensively when making the scheduling plan.In this paper,the dynamic scheduling of emergency material was studied under the condition of the evolution of post-earthquake secondary disasters.Firstly,the types of secondary disasters were determined and the evolution process was shown.The classification of earthquake damage was determined,the assessment formula was established according to the area of building collapse,and the comprehensive assessment of disaster situation was obtained after evaluating the proportion of affected population with GIS spatial overlay technology.The Bayesian secondary disaster network was established based on the Bayesian network,and the influencing factors of the occurrence of secondary disasters were quantified as network nodes and given range,which was used as the basis for calculating the occurrence probability of secondary disasters.Secondly,the evaluation system of the urgency of the needs of the disaster points was introduced,and the disaster assessment inference model was obtained by comprehensive evaluation,and the fuzzy comprehensive evaluation of entropy method was used to give weight to each index,and the priority scheduling scheme of each disaster area was obtained.Thirdly,the initial distribution of emergency materials and the second stage distribution under the occurrence of secondary disasters were considered,and a two-stage scheduling model with the shortest time and the highest comprehensive satisfaction rate was constructed.A genetic simulated annealing algorithm was designed based on Bayesian decision-making.Finally,taking the Yushu earthquake as an example,combined with the information of the disaster area to predict the occurrence of secondary disasters,the Matlab simulation software was used to solve the model,and the dynamic changes of the emergency materials distribution scheme under the multi-objective situation were obtained.The results show that: the evolution of secondary disasters in each disaster area was predicted,and the material demand has changed significantly.Disaster satisfaction and material utilization rate have increased,after real-time adjustment of emergency material scheduling plan.The evolution process and occurrence probability of earthquake secondary disasters were discussed,and the real-time changes of emergency materials schedule under secondary disaster scenarios were analyzed in this paper.A multi-objective emergency material dispatching plan was proposed,which will be of theoretical and practical significance for the establishment of an earthquake disaster rescue system.