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de Witte, D. (author), de Klijn-Chevalerias, M.L. (author), Loonen, R.C.G.M. (author), Hensen, J.L.M. (author), Knaack, U. (author), Zimmermann, G. (author)This paper reports on the research-driven design process of an innovative thermal mass concept: Convective Concrete. The goal is to improve building energy efficiency and comfort levels by addressing some of the shortcomings of conventional building slabs with high thermal storage capacity. Such heavyweight constructions tend to have a slow...journal article 2017
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Carzana, L. (author), Dachwald, Bernd (author), Noomen, R. (author)A laser-enhanced solar sail is a solar sail that is not solely propelled by solar radiation but additionally by a laser beam that illuminates the sail. This way, the propulsive acceleration of the sail results from the combined action of the solar and the laser radiation pressure. The potential source of the laser beam is a laser satellite...conference paper 2017
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Wijnia, Y.C. (author)In the liberalized energy market Distribution Network Operators (DNOs) are confronted with income reductions by the regulator. The common response to this challenge is the implementation of asset management, which can be regarded as systematically applying Cost Benefit Analysis (CBA) to the risks in the networks. In short, this is Risk Based...doctoral thesis 2016
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Zhang, Fan (author), Chen, Y. (author), Goni Ros, B. (author), GAO, Jian (author), Knoop, V.L. (author)Traffic congestion leads to delays and increased carbon dioxide (CO2) emissions. Traffic management measures such as providing information on environmental route costs have been proposed to mitigate congestion. Multi-criteria routing dynamic traffic assignment (MCR-DTA) models are needed to evaluate the effectiveness of such measures. This paper...conference paper 2016
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Wang, M. (author), Hoogendoorn, S.P. (author), Daamen, W. (author), van Arem, B. (author), Happee, R. (author)This contribution puts forward a flexible approach to model the decision-making or design controller for automated driving systems, where tactical-level lane change decisions and control-level accelerations are jointly evaluated based on iteratively solving an online optimization problem. The key idea is that automated vehicles determine lane...conference paper 2016
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Najafi, E. (author), Babuska, R. (author), Delgado Lopes, G.A. (author)Most stabilizing controllers designed for nonlinear systems are valid only within a specific region of the state space, called the domain of attraction (DoA). Computation of the DoA is usually costly and time-consuming. This paper proposes a computationally effective sampling approach to estimate the DoAs of nonlinear systems in real time....journal article 2016
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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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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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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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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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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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Verhaegen, M.H.G. (author), Hansson, A (author)The identification of multivariable state space models in innovation form is solved in a subspace identification framework using convex nuclear norm optimization. The convex optimization approach allows to include constraints on the unknown matrices in the data-equation characterizing subspace identification methods, such as the lower triangular...journal article 2016
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Gillebaart, E. (author), De Breuker, R. (author)Low-fidelity isogeometric aeroelastic analysis has not received much attention since the introduction of the isogeometric analysis (IGA) concept, while the combination of IGA and the boundary element method in the form of the potential flow theory shows great potential. This paper presents a two-dimensional low-fidelity aeroelastic analysis and...journal article 2016
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Mosaffa, A. H. (author), Farshi, L. Garousi (author), Infante Ferreira, C.A. (author), Rosen, M. A. (author)Exergoeconomic and environmental analyses are presented for two CO<sub>2</sub>/NH<sub>3</sub> cascade refrigeration systems equipped with (1) two flash tanks and (2) a flash tank along with a flash intercooler with indirect subcooler. A comparative study is performed for the proposed systems, and optimal values of operating parameters of the...journal article 2016
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Ravi, Narayen Kalyanarengan (author), Zondervan, Edwin (author), Van Sint Annaland, Martin (author), Fransoo, J. 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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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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Hoogland, J. (author), de Weerdt, M.M. (author), la Poutré, J.A. (author)Motivated by the energy domain, we examine a risk-averse buyer that has to purchase a fixed quantity of a continuous good. The buyer has two opportunities to buy: now or later. The buyer can spread the quantity over the two timeslots in any way, as long as the total quantity remains the same. The current price is known, but the future price...conference paper 2015
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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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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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Stano, P.M. (author)A Trailing Suction Hopper Dredger (TSHD) is a ship that excavates sediments from the sea bottom while sailing. In situ material is excavated with a special tool called the Drag-Head, then it is hydraulically transported through a pipe to the hopper where it is temporarily stored. After the dredging is completed the collected material is...doctoral thesis 2013