Showing 1 - 10 of 115
In this study, a mobile blood collection system is designed with the primary objective of increasing blood collection levels. This design also takes into account operational costs to aim for collection of large amounts of blood at reasonable cost. Bloodmobiles perform direct tours to certain...
Persistent link: https://www.econbiz.de/10011264304
asks for a network such that the sum of the edge costs is minimized. In this paper we present a matheuristic that …
Persistent link: https://www.econbiz.de/10010888255
In this paper, we investigate a two-stage lot-sizing and scheduling problem in a spinning industry. A new hybrid method called HOPS (Hamming-Oriented Partition Search), which is a branch-and-bound based procedure that incorporates a fix-and-optimize improvement method is proposed to solve the...
Persistent link: https://www.econbiz.de/10010730169
planning problem, and a matheuristic solution approach based on these models. The main goal of this aggregate planning tool is … that the suggested matheuristic is capable of generating solutions that capture most of this significant savings potential. …
Persistent link: https://www.econbiz.de/10010681845
In this paper we present a heuristic framework that is based on mathematical programming to solve network design problems. Our techniques combine local branching with locally exact refinements. In an iterative strategy an existing solution is refined by solving restricted mixed integer programs...
Persistent link: https://www.econbiz.de/10011156830
Existing literature on routing of school buses has focused mainly on building intricate models that attempt to capture … end, this paper defines the school bus routing problem (SBRP) as a variant of the vehicle routing problem in which three …
Persistent link: https://www.econbiz.de/10011052507
In the truck and trailer routing problems (TTRPs) a fleet of trucks and trailers serves a set of customers. Some … complete vehicle (a truck pulling a trailer). We propose a simple, yet effective, two-phase matheuristic that uses the routes … matheuristic we solved both the classical TTRP with fixed fleet and the new variant with unlimited fleet. This matheuristic …
Persistent link: https://www.econbiz.de/10011052701
A model is proposed that integrates a cost allocation method – the Shapley value – into the optimization of the synchronized consolidation of transportation orders. By balancing each partner’s delivery date changes (when synchronizing) against its allocated profit, it ensures that the...
Persistent link: https://www.econbiz.de/10011116992
We present an integer programming based heuristic, a matheuristic, for the liner shipping network design problem. This … fleet of container vessels. The matheuristic is composed of four main algorithmic components: a construction heuristic, an … good performance and is able to find high quality solutions within competitive execution times. The matheuristic can also …
Persistent link: https://www.econbiz.de/10011117000
As part of a study aimed at estimating suburban highway needs for year 2005, models were developed for forecasting daily vehicle miles of travel (DVMT) for urban areas and its distribution by highway functional class, urban location, and urban area size. A regression model combining both time...
Persistent link: https://www.econbiz.de/10009435975