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Stefan Ropke
Researcher at Technical University of Denmark
Publications - 79
Citations - 8356
Stefan Ropke is an academic researcher from Technical University of Denmark. The author has contributed to research in topics: Vehicle routing problem & Column generation. The author has an hindex of 33, co-authored 74 publications receiving 6877 citations. Previous affiliations of Stefan Ropke include HEC Montréal & University of Copenhagen.
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Parallel large neighborhood search - a software framework
TL;DR: A framework where the user has to set up a few data structures and implement a few functions and then the framework provides a metaheuristic where parallelization ”comes for free”, named large neighborhood search (LNS).
A branch-and-price algorithm to solve the integrated berth allocation and yard assignment problem in bulk ports
TL;DR: This research proposes an exact solution algorithm based on branch and price framework to solve the integrated problem of berth allocation and yard assignment in the context of bulk ports and indicates that the algorithm can be successfully used to solve instances containing up to 40 vessels within reasonable computational time.
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Cover inequalities for a vehicle routing problem with time windows and shifts
TL;DR: The vehicle routing problem with time windows and shifts (VRPTWS) is introduced and several shifts with nonoverlapping operating periods are available to load the planned trucks.
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A note on a model for quay crane scheduling with non-crossing constraints
TL;DR: In this article, the quay crane scheduling problem with non-crossing constraints is studied and an enhancement to a mixed integer programming model for the problem is proposed and a new class of valid inequalities is introduced.