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Kortleven, M. (author)
In this research computational fluid dynamics (CFD) is used to model a vertical axis wind turbine. Well known turbulence models | i.e. the k-epsilon and k-omega SST model | are used and compared in their performance against each other and a set of experimental data. The formal research question is "What models are available for the simulation of...
bachelor thesis 2016
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Buist, Jan Willem (author)
In open-pit mining on a bench level, the dig-limit optimization problem is deciding whether to classify a Selective Mining Unit(SMU) as waste or whether to classify it as ore. SMU’s with high ore grades are profitable for the mining operation, but due to equipment size a whole frame of SMU’s has to be classified as either ore or waste. In this...
bachelor thesis 2018
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Versluis, Nina (author)
This thesis concerns the cap set problem in affine geometry. The problem is illustrated by the card game SET and its geometrical interpretation in ternary affine space. The maximal cardinality of a cap is known for the dimension one to six. For the four lowest dimensions, a maximal cap is constructed and the optimality of its size proven. From...
bachelor thesis 2017
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Huijsman, Robbert (author)
Interest in phylogenetic trees for histories of species and DNA has spawned many problems, one of which is TreeContainment; a problem that asks whether a tree is contained within a network. The TreeContainment problem is proven to be NP-hard for general trees and networks, however it is solvable in polynomial time for networks that meet the tree...
bachelor thesis 2019
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Meijer, Angeline (author)
This report describes the study on the optimization of the magnetic field generated by a low-field magnetic resonance imaging modality. In the optimization the Genetic Algorithm and a quasi-Newton Algorithm are used.
bachelor thesis 2019
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Verzijlbergen, Esmay (author)
This thesis provides you with basic information on graph theory as well as phylogenetic networks, it studies the relationship between undirected (unrooted) and directed (rooted) phylogenetic networks, based on the manuscript 'Rooting for phylogenetic networks' . Undirected phylogenetic networks can be oriented to become a directed network. In...
bachelor thesis 2019
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Ha, Deon (author)
With the growing wealth and economy of a country, there are an increasing amount of small and big businesses. Every company has its own marketing strategy that it uses in order to lure customers away from their competition and increase their sales. Choosing the perfect time to advertise or discount several products is of essence for a company to...
bachelor thesis 2019
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Korkas, Christos D. (author), Baldi, S. (author), Michailidis, Iakovos (author), Boutalis, Yiannis (author), Kosmatopoulos, Elias B. (author)
Microgrids equipped with small-scale renewable-energy generation systems and energy storage units offer challenging opportunity from a control point of view. In fact, in order to improve resilience and enable islanded mode, micro-grid energy management systems must dynamically manage controllable loads by considering not only matching energy...
conference paper 2016
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Xu, J. (author), van den Boom, A.J.J. (author), Busoniu, L (author), De Schutter, B.H.K. (author)
This paper considers model predictive control for continuous piecewise affine (PWA) systems. In general, this leads to a nonlinear, nonconvex optimization problem. We introduce an approach based on optimistic optimization to solve the resulting optimization problem. Optimistic optimization is based on recursive partitioning of the feasible set...
conference paper 2016
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Kalyanarengan Ravi, Narayen (author), Zondervan, Edwin (author), Van Sint Annaland, Martin (author), Fransoo, Jan C. (author), Grievink, J. (author)
A major challenge for the industrial deployment of a CO<sub>2</sub> emission reduction methodology is to reduce the overall cost and the integration of all the nodes in the supply chain for CO<sub>2</sub> emission reduction. In this work, we develop a mixed integer linear optimization model that selects appropriate sources, capture process,...
conference paper 2016
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Baldi, S. (author), Kosmatopoulos, Elias B. (author), Pitsillides, Andreas (author), Lestas, Marios (author), Ioannou, Petros A. (author), Wan, Y. (author)
An adaptive decentralized strategy for active queue management of TCP flows over communication networks is presented. The proposed strategy solves locally, at each link, an optimal control problem, minimizing a cost composed of residual capacity and buffer queue size. The solution of the optimal control problem exploits an adaptive...
conference paper 2016
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Wang, K. (author), Yan, Xinping (author), Yuan, Yupeng (author), Jiang, X. (author), Lodewijks, G. (author), Negenborn, R.R. (author)
In the case of the global energy crisis and the higher sound of energy saving and emission reduction, how to take effective management measures of ship energy efficiency to achieve the goal of energy saving and emission reduction, put forward a new challenge for the development of shipping technology. The application of big data technology...
conference paper 2017
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Florjancic, D. (author), Steenhuizen, D. (author), Veldhuis, L.L.M. (author)
Optimization of a single slotted flap with dropped hinge is performed with the objective of increasing the payload of a propeller driven 4-seater general aviation aircraft. Within the optimization loop, two-dimensional aerodynamic characteristics are evaluated using the MSES code, while three-dimensional aerodynamic characteristics and weight...
conference paper 2016
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Ma, X (author), Kato, Y (author), van Kempen, F.C.M. (author), Hirai, Y (author), Tsuchiya, T (author), van Keulen, A. (author), Tabata, O (author)
We report a multiple patterning approach utilizing digital-micromirror-device (DMD)-based grayscale lithography, providing a solution to improve fabrication accuracy for entire target three-dimensional structure. Because DMD-based lithography system consists a projection lens system, better resolution can be obtained around focal position...
conference paper 2015
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Baldi, S. (author)
This work proposes an iterative procedure for static output feedback of polynomial systems based on Sum-of-Squares optimization. Necessary and sufficient conditions for static output feedback stabilization of polynomial systems are formulated, both for the global and for the local stabilization case. Since the proposed conditions are bilinear...
conference paper 2016
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Bordogna, M.T. (author), Bettebghor, Dimitri (author), Blondeau, Christophe (author), De Breuker, R. (author)
The main objective of this paper is to propose an aeroelastic optimization approach capable of performing structural sizing optimization considering structural and aerodynamic constraints. The proposed approach uses a detailed FE model of a composite wing with shell elements in order to obtain realistic weight estimation and structural...
conference paper 2017
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Ma, X (author), Kato, Y (author), Hirai, Y (author), van Kempen, F.C.M. (author), van Keulen, A. (author), Tsuchiya, T (author), Tabata, O (author)
Digital Micromirror Device (DMD)-based grayscale lithography is a promising tool for three dimensional (3D) microstructuring of thick-film photoresist since it is a maskless process, provides possibility for the free-form of 3D microstructures, and therefore rapid and cost-effective microfabrication. However, process parameter determination...
conference paper 2015
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Schwarting, Wilko (author), Alonso Mora, J. (author), Pauli, Liam (author), Karaman, Sertac (author), Rus, Daniela (author)
Current state-of-the-art vehicle safety systems, such as assistive braking or automatic lane following, are still only able to help in relatively simple driving situations. We introduce a Parallel Autonomy shared-control framework that produces safe trajectories based on human inputs even in much more complex driving scenarios, such as those...
conference paper 2017
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Denucci, T.W. (author)
conference paper 2012
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Chatzikonstantinou, I. (author)
Environmentally friendly and comfortable buildings are a much sought after goal in today's architectural practice. In order to improve energy consumption of buildings without sacrificing indoor comfort, careful consideration of design decisions is needed. Simulation tools provide a solution to one aspect arising from this need, namely the...
conference paper 2016
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