Ongoing globalization causes increasing transportation rates and transshipment volumes at sea ports (Steenken, 2004). Different to container transshipment, the transshipment of finished vehicles has received only minor attention in research yet (Mattfeld and Kopfer, 2003). By means of statistics for major ports of the North-West European coast line the structure and development of vehicle trans...

We present a scheduling problem of the flow-shop type. We introduce a transportation system: robot or conveyor. This transportation system is also involved in machine loading and unloading. The studied workshop consists of two machines and a conveyor that must process a set of tasks. Tasks having just been executed wait for the conveyor to be transported. The objective is to determine a feasibl...

We present the first time-optimal algorithm for computing the Voronoi Diagram under the metric induced by a transportation network with discrete entry and exit points. For input with n sites, k stations, and e transportation lines, the algorithm computes the Voronoi Diagram in O ( (n+ k) log(n+ k) + e ) time.

one main group of a transportation network is a discrete hub covering problem that seeks to minimize the total transportation cost. this paper presents a multi-product and multi-mode hub covering model, in which the transportation time depends on travelling mode between each pair of hubs. indeed, the nature of products is considered different and hub capacity constraint is also applied. due to ...

Available online 30 January 2009