A Logistics model in natural disaster

An emergency logistics model based on Location-routing Problem (LRP) is proposed in this paper, and a two-phase heuristic algorithm is used to solve the model. It uses the minimization envelopment analysis method to solve the LRP in the emergency supplies center, and then calculates K shorter paths by the application of the nearest neighbor method. Considering the indexes of time, security, economic cost and environment cost of emergency transportation routing, the paper establishes a shortest-path with the method of Analytic Network Process (ANP). Based on the analysis and calculation of an example, the results indicate that the model and method are effective and feasible.