Searched for: subject:"scheduling"
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Schepers, Job (author)
Due to an increase demand for renewable and sustainable forms of energy, the offshore wind industry is growing rapidly. To make wind energy more cost-effective, new wind turbines are becoming larger in size and are placed further offshore. This results in deeper waters, making the installation more difficult. The current methodology uses a jack...
master thesis 2021
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Debeuckelaere, Bart (author)
This Thesis proposes an optimisation model to minimize operational cost of a fleet of electric thin-haul aircraft under a minimum RPK (Revenue-Passenger Kilometer) constraint. A solution that minimises cost per RPK can be found by varying the minimum RPK level. The solutions describes how many aircraft are needed, as well as a schedule for each...
master thesis 2021
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Pool, Lourens (author)
Optimization of traffic signal control has been widely investigated by means of model-based strategies. In 2012 a new model-based controller was published, named Schedule-driven Intersection Control (SCHIC). This controller uses a job-scheduling algorithm to minimize the cumulative delay for all observed vehicles. The algorithms of SCHIC are at...
master thesis 2021
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El Uamari, Hamza (author)
Stand capacity assessment is an essential factor in airport planning and design due to the large investments associated with airport development. Fulfilling anticipated demand while still considering future growth is key in airport master planning. In this paper, a mixed-integer linear programming optimisation model is proposed, which determines...
master thesis 2021
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Randolph, Charles (author)
ROS 2 is a well-known software framework for the development of robotic applications. The open-source project enjoys active interest and participation from both academia and industry in applications spanning from autonomous vehicles to industrial robotics. ROS 2's success is underpinned by its disposition for collaborative development as well as...
master thesis 2021
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van Leeuwen, Anouk (author)
The Dutch Railways (NS) is the Dutch national passenger railway operator. They own rolling stock that has to be maintained regularly. One of the maintenance facilities executing regular maintenance on regional trains is the maintenance department (OB) in Leidschendam. The aim of this project is to develop a framework for optimizing the...
master thesis 2021
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Klop, Pepijn (author), Shah, Mozafar (author), Sitaram, Ashwin (author)
During this project, we have explored the possibilities for an algorithm that can schedule multiple visits taking into consideration constraints and KPIs. The solution we came up with has been integrated into Dropboard and is ready to be used in production by Dropboard’s clients. Our algorithm takes as input the visits to be scheduled. It then...
bachelor thesis 2021
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Meegdes, Jordan (author)
This thesis introduces a theory for model-driven objective functions in Model Predictive Control (MPC) algorithms. For scheduling supply chains, such model-driven objective functions allow the MPC algorithm to make optimal scheduling decisions by anticipating future changes in product flow and transfer price dynamics. Including such dynamics...
master thesis 2021
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Hultermans, Thomas (author)
The buildup phase at KLM Cargo requires cumbersome planning actions because of a slow data handover at the warehouse and an uncertain initial state of the buildup process at the beginning of the shift. This study presents a model to improve scheduling of future buildup shifts according to flight departure times of KLM. The most important...
master thesis 2021
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van Rossum, Rik (author)
With the fast-growing electricity demand, challenges arise affecting the reliability and the quality of the distribution network. The Dutch DSOs could expand the network capacity, but it is not sure if the network can be expanded fast enough. Network expansion will result in higher total consumer costs and if the network expansion rate is too...
master thesis 2021
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van Hartingsveldt, Tessa (author)
During the first COVID-19 wave in the Netherlands, hospitals had to scale down their elective care all over the hospital to make room for COVID-19 patients. Even the Operating Room (OR) reduced their surgeries to acute care. It is, however, hard to define how much the OR should downscale. Also, there are no national plans on how hospitals should...
master thesis 2021
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de Weerdt, M.M. (author), Baart, Robert (author), He, L. (author)
Single-machine scheduling where jobs have a penalty for being late or for being rejected altogether is an important (sub)problem in manufacturing, logistics, and satellite scheduling. It is known to be NP-hard in the strong sense, and there is no polynomial-time algorithm that can guarantee a constant-factor approximation (unless P=NP). We...
journal article 2021
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Stipanovic, Irina (author), Bukhsh, Zaharah Allah (author), Reale, Cormac (author), Gavin, Kenneth (author)
Aged earthworks constitute a major proportion of European rail infrastructures, the re-placement and remediation of which poses a serious problem. Considering the scale of the networks involved, it is infeasible both in terms of track downtime and money to replace all of these assets. It is, therefore, imperative to develop a rational means...
journal article 2021
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Hu, R. (author), Ferrari, Riccardo M.G. (author), Chen, Z. (author), Cheng, Yuqiang (author), Zhu, Xiaobin (author), Cui, Xing (author), Wu, Jianjun (author)
This paper proposes a controller design for the electric pump of a deep-throttling rocket engine. The nonlinearity of the system is taken into consideration by analyzing the gap metric. Then, proportional-integral-derivative controller and gain-scheduling linear quadratic regulator are designed. Analyzing the amplitude- and phase-frequency...
journal article 2021
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Fu, J. (author), Nunez, Alfredo (author), De Schutter, B.H.K. (author)
Preventive maintenance is applied in distribution networks to prevent failures by performing maintenance actions on components that are at risk. Distributed generators (DGs) and batteries can be used to support power to nearby loads when they are isolated due to maintenance. In this paper, a novel short-term preventive maintenance method is...
journal article 2021
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Cheng, Long (author), Wang, Ying (author), Liu, Qingzhi (author), Epema, D.H.J. (author), Liu, Cheng (author), Mao, Ying (author), Murphy, John (author)
Large data centers are currently the mainstream infrastructures for big data processing. As one of the most fundamental tasks in these environments, the efficient execution of distributed data operators (e.g., join and aggregation) are still challenging current data systems, and one of the key performance issues is network communication time....
journal article 2021
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Andrade, Pedro (author), Silva, Catarina (author), Ribeiro, Bernardete (author), Santos, Bruno F. (author)
This paper presents a Reinforcement Learning (RL) approach to optimize the long-term scheduling of maintenance for an aircraft fleet. The problem considers fleet status, maintenance capacity, and other maintenance constraints to schedule hangar checks for a specified time horizon. The checks are scheduled within an interval, and the goal is...
journal article 2021
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Witteman, Max (author), Deng, Q. (author), Santos, Bruno F. (author)
This paper addresses the scheduling of aircraft maintenance tasks that must be carried out in multiple maintenance checks to keep a fleet of aircraft airworthy. The allocation of maintenance tasks to maintenance opportunities, also known as the task allocation problem (TAP), is a complex combinatorial problem that needs to be solved daily by...
journal article 2021
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Al-Khanak, Ehab Nabiel (author), Lee, Sai Peck (author), Khan, Saif Ur Rehman (author), Behboodian, Navid (author), Khala, Osamah Ibrahim (author), Verbraeck, A. (author), van Lint, J.W.C. (author)
Scientific Workflow Applications (SWFAs) can deliver collaborative tools useful to researchers in executing large and complex scientific processes. Particularly, Scientific Workflow Scheduling (SWFS) accelerates the computational procedures between the available computational resources and the dependent workflow jobs based on the researchers’...
journal article 2021
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Lao, L. (author), van Someren, J. (author), Ashraf, I. (author), Almudever, Carmen G. (author)
Quantum algorithms need to be compiled to respect the constraints imposed by quantum processors, which is known as the mapping problem. The mapping procedure will result in an increase of the number of gates and of the circuit latency, decreasing the algorithm’s success rate. It is crucial to minimize mapping overhead, especially...
journal article 2021
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