Research On Large-Scale Multi-Stage Urban Emergency Equipment Allocation Problem

The distribution and dispatching of emergency materials is a difficult problem in the distribution of disaster relief,especially in the modern road construction presents different characteristics,more and more aspects of emergency distribution need to be considered.In this paper,we focus on the complex emergency scenarios of large-scale disasters.The combination of emergency equipment and the rescue relationship are the focus of our research.When multi-type equipment is involved in the rescue,the relief action is different due to the characteristics of the device itself,some equipment needs to return to the origin after the rescue,and some devices can go directly to the next disaster site after the current rescue,so they need to be classified.In addition,the combination of multiple types of devices is a close connection between the rescue relationship,which is defined as a "synchronous rescue",For the same disaster point,rescue action began with the last device to reach it.Because of the restrictions on the capacity of the city’s internal rescue facilities,the need for disaster relief is often not processed at one stage,so multi-stage relief is considered.The importance is an important indicator of the division phase of this article.When the rescue relationship and multi-stage rescue considerations are considered for the distribution of emergency equipment in the city,there is an inevitable presence in various stages that there is a small amount of equipment that is not allocated.These devices that have not been assigned instructions should be immediately decided to go to the later stages of the disaster(the early decision rule),or the allocation decision of the next phase of the next phase of the decision,and the next relief point(the waiting allocation principle),the choice of the device should also be considered in the distribution problem.In the background of the urban rescue,the urban road traffic condition has not been neglected.The construction of the old house in the twenty-first century has produced a series of traffic problems that often make it harder to rescue them.The solution to the above large-scale emergency equipment problems is often based on the optimization algorithm.The results show that under the background of synchronous rescue,when the objective function is the same,whether considering the latest rescue time of the system,the average rescue time of the disaster point,the proportion of the disaster point rescued first or the effective utilization rate of the equipment in the system,the decision in advance can bring better results.While the decision principles are the same,considering the minimum waiting time of the equipment in the system can make most of the disaster points in the system get rescue earlier,considering the importance of the disaster points in the system multiplied by the minimum sum of the rescue time can make the average rescue time of the whole disaster points in the system shorter.The comparison between independent rescue and synchronous rescue shows that the rescue time of each disaster site under independent rescue is obviously earlier than that under synchronous rescue.As for the influence of road traffic conditions,under the principle of advance decision making,the overall rescue time and equipment waiting time of the disaster points in the system will increase with the expansion of the central region of the circle.If the disaster points are dispersed to multiple regions,the objective function of each model will increase with the increase of the dispersion degree.This paper studies the problem of the combination distribution of emergency equipment from the characteristics of emergency equipment and disaster.It has enriched the research content of disaster emergency rescue,and also helps emergency rescue work to be considered more from equipment itself,disaster characteristics and demand point characteristics.