Blar i NTNU Open på forfatter "Fagerholt, Kjetil"

Viser treff 41-60 av 131

    • Emission Control Areas: Effect on the Fleet Renewal Problem 

      Sørgård, Ellen Helene (Master thesis, 2014)
      An important strategic planning problem in shipping is the fleet renewal problem. The purpose for liner shipping companies is to minimize the company's costs while finding the best way in which to develop a fleet over time ...

    • Evaluating fleet effectiveness in tactical emergency response missions using a maximal covering formulation 

      Pettersen, Sigurd Solheim; Fagerholt, Kjetil; Asbjørnslett, Bjørn Egil (Peer reviewed; Journal article, 2019)
      This paper concerns the evaluation of alternative fleets of advanced special vessels, like coast guard or emergency response and rescue vessels. The paper proposes a mathematical programming formulation of the Fleet ...

    • Evaluating port development strategies for a modal shift: a Norwegian case study 

      Ormevik, Andreas Breivik; Erikstad, Stein Ove; Fagerholt, Kjetil (Peer reviewed; Journal article, 2020)
      We study the design of a multi-modal distribution network for the transportation of incoming containers from a container terminal to nearby customer regions. The motivation for the study has been the relocation of the ...

    • An exact solution method for the capacitated item-sharing and crowdshipping problem 

      Behrend, Moritz; Meisel, Frank; Fagerholt, Kjetil; Andersson, Henrik (Peer reviewed; Journal article, 2019)
      The item-sharing and crowdshipping problem combines two concepts of the sharing economy, namely item-sharing and crowdshipping. Item-sharing is about renting items among members of a sharing community. Crowdshipping addresses ...

    • The Fish Feed Production Routing Problem 

      Brekkå, Ivar; Randøy, Solveig; Fagerholt, Kjetil; Thun, Kristian; Vadseth, Simen Tung (Peer reviewed; Journal article, 2022)
      This paper introduces the fish feed production routing problem (FFPRP) faced by Norwegian salmon feed producers. The FFPRP is comprised of a production scheduling problem and a rich vehicle routing problem (VRP) and thus ...

    • Fleet Deployment & Disruption Management in RoRo Liner Shipping 

      Olsen, Henrik Andre; Nokhart, Håkon Stavn; Fischer, Andreas Sola (Master thesis, 2015)
      This master thesis consists of two parts. In Part I, the maritime fleet deployment problem for a major Roll-on Roll-off shipping case company is studied. The objective of the fleet deployment problem is to assign vessels ...

    • Green Tramp Shipping Routing and Scheduling: Effects of Market-Based Measures on CO2 Reduction 

      Wang, Xin; Norstad, Inge; Fagerholt, Kjetil; Christiansen, Marielle (Chapter, 2019)
      In this chapter we examine, from a tramp ship operator’s point of view, how potential CO2 emission reduction measures impact the operational decisions and their economic and environmental consequences. Two market-based ...

    • Heuristics for dynamic and stochastic routing in industrial shipping 

      Tirado, Gregorio; Hvattum, Lars Magnus; Fagerholt, Kjetil; Cordeau, Jean-François (Journal article; Peer reviewed, 2012)
      Maritime transportation plays a central role in international trade, being responsible for the majority of long-distance shipments in terms of volume. One of the key aspects in the planning of maritime transportation systems ...

    • A high-fidelity approach to modeling weather-dependent fuel consumption on ship routes with speed optimization 

      Ormevik, Andreas Breivik; Fagerholt, Kjetil; Meisel, Frank; Sandvik, Endre (Peer reviewed; Journal article, 2023)
      In this paper, we present the scheduling problem on a given route where speed optimization under various weather conditions is to be performed. Different approaches for calculating fuel consumption for vessels are introduced ...

    • Impact of simulation model fidelity and simulation method on ship operational performance evaluation in sea passage scenarios 

      Nielsen, Jørgen Bremnes; Sandvik, Endre; Pedersen, Eilif; Asbjørnslett, Bjørn Egil; Fagerholt, Kjetil (Journal article; Peer reviewed, 2019)
      In this paper, we present and investigate important factors that influence a vessels fuel consumption during operation and what model fidelity that is required to adequately capture these factors in fuel consumption ...

    • The impact of the Northern Sea Route on ship routing and scheduling 

      Li, Mingyu (Doctoral theses at NTNU;2022:215, Doctoral thesis, 2022)

    • Industrial and Tramp Ship Routing Problems: Closing the Gap for Real-Scale Instances 

      Homsi, Gabriel; Martinelli, Rafael; Vidal, Thibaut; Fagerholt, Kjetil (Peer reviewed; Journal article, 2019)
      Recent studies in maritime logistics have introduced a general ship routing problem and a benchmark suite based on real shipping segments, considering pickups and deliveries, cargo selection, ship-dependent starting ...

    • Joint relocation and pricing in electric car-sharing systems 

      Eilertsen, Ulrik; Falck-Pedersen, Olav Mattias; Henriksen, Jone Våge; Fagerholt, Kjetil; Pantuso, Giovanni (Journal article; Peer reviewed, 2023)
      In this paper we study the integrated planning problem of determining car-sharing prices between zones of the operating area and routing employees (operators) to relocate cars in preparation for future uncertain demand. ...

    • Kindergarten allocation in Norway: An integer programming approach 

      Geitle, Anders Hasson; Johnsen, Øyvind Knutsen; Ruud, Håkon Fredrik; Fagerholt, Kjetil; Julsvoll, Carl Andreas (Peer reviewed; Journal article, 2020)
      Kindergartens are vital to society in many countries, and in Norway, the municipalities are the local authorities that facilitate a coordinated admission process involving all their kindergartens. Allocating children to ...

    • Maritime crude oil transportation – A split pickup and split delivery problem 

      Hennig, Frank; Nygreen, Bjørn; Christiansen, Marielle; Fagerholt, Kjetil; Furman, Kevin C; Song, Jinhwa; Kocis, Gary R; Warrick, Philip H (Journal article; Peer reviewed, 2012)
      The maritime oil tanker routing and scheduling problem is known to the literature since before 1950. In the presented problem, oil tankers transport crude oil from supply points to demand locations around the globe. The ...

    • Maritime fleet composition under future greenhouse gas emission restrictions and uncertain fuel prices 

      Loennechen, Olav; Fagerholt, Kjetil; Lagemann, Benjamin; Stålhane, Magnus (Peer reviewed; Journal article, 2024)
      This paper studies the maritime fleet composition problem with uncertain future fuel and carbon prices under the restriction of complying with future greenhouse gas (GHG) emission restrictions. We propose a two-stage ...

    • Maritime fleet deployment in ro-ro shipping under inventory constraints 

      Chandra, Saurabh; Fagerholt, Kjetil; Christiansen, Marielle (Journal article; Peer reviewed, 2015)
      We present a tactical maritime fleet deployment problem in roll-on roll-off (ro-ro) liner shipping scenario, which deals with optimally assigning planned voyages to the available vessels in a fleet to determine the routing ...

    • Maritime fleet deployment with speed optimization and voyage separation requirements 

      Borander, Venke; Straume, Anders; Dong, Bo; Fagerholt, Kjetil; Wang, Xin (Journal article; Peer reviewed, 2018)
      A shipping company operates a heterogeneous fleet of ships to service a given number of voyages on a number of trade routes over the planning horizon. Each ship has a predefined speed range within which it can sail. Fuel ...

    • Maritime inventory routing : recent trends and future directions 

      Fagerholt, Kjetil; Hvattum, Lars Magnus; Papageorgiou, Dimitri J.; Urrutia, Sebastián (Peer reviewed; Journal article, 2023)
      We review recent literature pertaining to the maritime inventory routing problem (MIRP), a stimulating, albeit niche, subclass of vendor-managed inventory problems. MIRPs deal with optimally distributing products with a ...

    • Maritime inventory routing with transshipment: the case of Yamal LNG 

      Li, Mingyu; Fagerholt, Kjetil; Schütz, Peter (Peer reviewed; Journal article, 2022)
      The LNG-ADP problem is a tactical planning problem for creating an annual delivery program (ADP) for a liquefied natural gas (LNG) producer. An ADP specifies the departure dates of the LNG carriers as well as the delivery ...