Research And Implementation Of The Distributed 4PL Decision Support System In The Unified Market

Base on the in-depth analysis and research of existing distributed 4PL decision support system, in view of the problem that it lacks the system model in the circumstance of unified market, this article take the unified market of agricultural and subsidiary products as the background, analyze and research the characteristic of 4PL and its developmental direction in this circumstance thoroughly. It proposed the distributed 4PL decision support system which is in the circumstance of unified market. It is also one of research contents about unified marketing.Then,utilize the distributed object technology, through the platform of J2EE,component model EJB which at the end of Java sever and component model JavaBean which at the end of Java client,implemente this system specifically in technical aspect.Then research and resolve the three key problems in this system emphatically. The three key problems are the selection of optimal path in logistics,the problem of split and incorporate order,the evaluate system and measure to 3PL logistics providers.Profit from the idea and the theory of exchange and update route information in OSPF router protocol, this article combined it with the improved A* algorithm which has many restrict conditions and then proposed a new algorithm of the selection of optimal path in logistics. It established the concrete algorithm of split and incorporate order. It combined the AHP and the Delphi method with credit degree and then established the method of intelligentized selection to 3PL providers.Finally, through the concrete experiment and analysis, validate the feasibility,validity and correctness of algorithms which are used to resolve the three key problems in system.