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This paper considers multiple mobile robots for hospital logistics application. To increase the efficiency of using multiple robots, more than one delivery tasks can be assigned to a robot instead of delivering one package at a time. Since a robot can accept more than one task while delivering, a real-time routing method for visiting multiple pickup and delivery positions is required. This paper proposes...
In most medium and large sized cities around the world, freight transportation operations might have a noticeable impact on urban traffic mobility as well as on city commercial activities. In order to reduce both traffic congestion and pollution levels, several initiatives have been traditionally implemented. One of the most common strategies concerns the allocation of urban distribution warehouses...
This paper takes vehicle distribution of TPL as the object of study, discussing the solution to the arrangement of vehicle routing problem which is based on “multi-deport” vehicle distribution of the triangle network. As for the actual situation of vehicle distribution, clusters the supply and demand nodes into sliced area in order to form triangle distribution model and realize the triangle closed-loop...
Joint-distribution can reduce the less-than-truck-load (LTL) shipping, so that it is important to metropolis, where individual logistic firms are usually small and can not obtain economies of scale. Unfortunately, most of existing web-platforms of common logistics can not play its pre-determined role of join-distribution because of lacking of the incentive mechanism and cost allocation mechanism among...
We describe a kind of supply chain optimization problem as a commodity stream routing problem upon a stochastic flow network. We divide the optimization problem to two parts: Firstly, establish model to calculate the optimal commodity stream allocation policy on all minimal paths; secondly, convert these allocation policy on all minimal paths to the optimal routing policy on all arcs. A multi-objective...
Facing distribution channel restructuring and quick response to the diversity of customer order demands, the specialized logistics companies have been urgently requested with the capability of allocating limited resources in the process of logistics allocation control and decision. Ant colony algorithm is proposed aiming at solving the logistics allocation problem, and pheromone updating strategy...
With the trend of globalization and increasing transportation volume, integrated automated shipment handling systems have appeared in major cargo terminals. In such terminals, a critical decision is the route selection linking various origins (such as system gate points) and destinations (such as storage racks). We study such a routing optimization problem and propose a flow rationing routing strategy,...
Logistics costs often represent a large portion of the expenses of companies. In order to reduce them, location allocation and vehicle routing are crucial. In the administrative decision of the logistics, location allocation problems (LAP) and vehicle routing problems (VRP) are interdependent. But most of time, they are considered separately. This can not reduce company's total cost in reality and...
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