Lrp Model Of Urban Logistics Distribution System And Its Algorithm

The inconsistency between information flow and logistics came into being while e-commerce having developed. In order to sloved this problem, the abstract LRP had been introduced to city logistics dispatch system. Over the past few decades, studies in LRP had aimed at single objective and abstract level, which could not reflect character of city logistics. Building a multiple objective LRP which reflect character of city logistics and sieving it use heuristic are means to slove city logistics dispatch problems.The city logistics had been put forward in order to account for the transport dispatch problem in the city zone. The character of the city logistics information system had been analyzed at the beginning of this paper. Then, a truth that the city logistics delivery system dispatch problem could be expressed with the abstract LRP model had been pointed out. A multi-objective mixed integer programming model, which abstracted the city logistics delivery system LRP, had been presented. A two-phase heuristic had been introduced to solve the modle. The whole problem had been splied into two phases, and different heuristic methods had been introduced to each phase. A method of the data input and output has been introduced in order to solve the problem of the route information storage. At the same time, a method to calculate the distance of any two spots in the range of the logistics delivery had been presented. A simulated model had been worked out at the end of this paper.