Abstract 

Based on GISas the main carrier, ourreal time computer simulation system of urban logistics distributionvehicle routing optimizationprecisely measures and marks the information of distribution site, providingtrue and available information for routing optimization, performing low costand highly efficient operation on vehicle scheduling by the distributioncenter through optimizationalgorithm. Thesystem can satisfy the demand of urban logistics distribution routing optimization under themulti-constraints condition of variable distribution cites and complex urbanroads by simulating numerous distribution cites up to scores of thousandsaccording to different plans and different regions and counting the informationof vehicle routing and loading by different plans for contrast analysis so asto adjust and optimize the distribution routing, regions, period and vehiclesin order to accomplish the equilibrium distribution and management of manyrelevant indexes such as vehicle load capacity, distribution work capacity and distributiontime. 

1. Brief introduction of the system

1.1. Background and targets

After the entry of Chinainto WTO,Chinese enterprises have been facing the fierce competition of overseas companiesand therefore the problem of improving their competitive edge has alreadybecome a key topic. “Logistics”, considered by professionals as “the third resourceof profit”, is one of the most significant ways to enhance their competitivecapability. Distribution is the nucleus of logistics. Increasing the efficiencyof distribution and decreasing its cost are the most important issues inlogistics.

Currently, the transportation standsa dominant position in the logistics system. It consists of trunk movement and regionaldistribution.