Searched for: subject%3A%22Local%255C+search%22
(1 - 15 of 15)
document
DavoodiMonfared, M. (author), Rezaei, J. (author)
This study introduces a general framework, called Bi-sided facility location, for a wide range of problems in the area of combined facility location and routing problems such as locating test centres and designing the network of supermarkets. It is based on a multi-objective optimisation model to enhance the service quality which the clients...
journal article 2023
document
Barendse, Thomas (author)
Demand for online grocer Picnic has increased exponentially over the past years, and their truck transport operation must scale with it. Given the resource constraints at all warehouses, as well as other specific restrictions, this poses a Multi Depot Pickup and Delivery Problem with Resource Constraints, for which no good solutions are found to...
master thesis 2022
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van den Broek, Roel (author), Hoogeveen, Han (author), van den Akker, Marjan (author), Huisman, B. (author)
In this paper we consider the train unit shunting problem extended with service task scheduling. This problem originates from Dutch Railways, which is the main railway operator in the Netherlands. Its urgency stems from the upcoming expansion of the rolling stock fleet needed to handle the ever-increasing number of passengers. The problem...
journal article 2022
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Pierotti, J. (author), Ferretti, Lorenzo (author), Pozzi, Laura (author), van Essen, J.T. (author)
Metaheuristics have been widely used to solve NP-hard problems, with excellent results. Among all NP-hard problems, the Travelling Salesman Problem (TSP) is potentially the most studied one. In this work, a variation of the TSP is considered; the main differences being, edges may have positive or negative costs and the objective is to return...
conference paper 2021
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den Ottelander, Tom (author)
Computer vision tasks, like supervised image classification, are effectively tackled by convolutional neural networks, provided that the architecture, which defines the structure of the network, is set correctly. Neural Architecture Search (NAS) is a relatively young and increasingly popular field that is concerned with automatically optimizing...
master thesis 2020
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Slotboom, Cynthia (author)
In a Vehicle Routing Problem with Time Windows (VRPTW), orders have to be picked up and delivered within certain time windows. In practice, planners often allow violations of these time windows, when the solutions with violations have better objective values. This is done by changing the problem into a Vehicle Routing Problem with Soft Time...
master thesis 2019
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van Lochem, Jelmer (author)
In thedynamic world we live in, the transportation of people and goods in a reliable,efficient and timely manner has grown to be more important than ever. Roads andcities are becoming more congested and the impact of greenhouse gasses canalready be observed. The need for controlling transportation systems, andspecifically fleets of vehicles,...
master thesis 2019
document
Molnar, Goran (author), Correia, Gonçalo (author)
Reservations in daily services can improve user satisfaction, and give additional information about the demand patterns to the operators. However, providing reservations to carsharing clients is difficult. While carsharing is especially convenient if it is allowing one-way trips and vehicle drop-off anywhere in the service area (called free...
journal article 2019
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van Dijk, Casper (author)
Parcel delivery companies offer time-guaranteed transportation of parcels, letters and packages, picked up at one customer and delivered at another. The time in which this has to be done depends on the service level that the customer pays for. To transport the parcels, a network is used consisting of facilities and links, where the facilities...
master thesis 2018
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Villa Acuña, Paloma (author)
Since its inception in 1975, Genetics Algorithms (GAs) have been successfully used as a tool for global optimization on non-convex problems in a wide range of real world applications. Its creation was inspired by natural adaptation and selection mechanisms that evolve from one population of chromosomes to a fitter population by means of an...
master thesis 2018
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Kalicharan, Kishan (author)
In intermodal transport multiple types of vehicles are used to transport containers. If the routes of the vehicles are known, then the container allocation can be optimized. This problem can be modelled as an integral multi-commodity min cost flow problem on a time-space graph. This model has an arc-based and path-based form. In this thesis, the...
master thesis 2018
document
Dai, Lu (author)
Planning and scheduling problem is a hard problem, especially in real life cases. The time and space complexity increase quickly along with the increase of problem size. In transportation systems, such problems exist a lot. The automation of transportation systems depends a lot on the improvements of developing planning and scheduling algorithm....
master thesis 2018
document
Gribling, S.J. (author)
In order to help network operators with their long term planning, a (part of a) decision support system has been developed in this thesis. We have compared two local search methods and we have investigated the influence of choosing the initial state more wisely. The choice of initial state is based upon the solution of a binary program...
master thesis 2015
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De Hoog, S.A. (author)
Tegenwoordig moet bijna overal bezuinigd worden, onder andere in ziekenhuizen. Ziekenhuizen krijgen kleinere subsidies, maar de kwaliteit van de zorg mag niet achteruit gaan. Door processen in het ziekenhuis te optimaliseren, kan er voor gezorgd worden dat de jaarlijkse kosten van een ziekenhuis achteruit gaan. Hiermee wordt dan niet de...
bachelor thesis 2014
document
Heule, M.J.H. (author), Van Maaren, H. (author)
We show how to exploit the 32/64 bit architecture of modern computers to accelerate some of the algorithms used in satisfiability solving by modifying assignments to variables in parallel on a single processor. Techniques such as random sampling demonstrate that while using bit vectors instead of Boolean values solutions to satisfiable formulae...
journal article 2008
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