Brick rigs vehicles not being destructed

The hubs serve as consolidating, switching, and sorting centers. Hub-and-spoke operation is now an almost dominant style of operation both in telecommunication and transportation. Our extensive computational experiments confirm the efficiency of this solution method in terms of quality as well as computational time. Several classes of valid inequalities as well as efficient separation routings are also proposed for being used within the relax-and-cut approach. This hybridization provides a mechanism in which the obtained dual information through the Lagrangian relaxation (bundle) method being utilized to guide the local searches for constructing/improving feasible solutions. We propose a hybrid of hyper-heuristic and a relax-and-cut solution method, which includes cooperation among several low-level heuristics governed and controlled by a learning mechanism. As a particular property of this problem, each cluster of spoke nodes allocated to a hub constitutes a directed route that starts from the hub, visits all the spokes in the same cluster, and terminates to the same hub.

A variant of the hub location routing problem studied in this work, which is the problem of locating a set of hub nodes, is establishing the hub-level network and allocating the spoke nodes to the hub nodes.

Brick rigs vehicles not being destructed