Searched for: collection%3Air
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ten Eikelder, S.C.M. (author), den Hertog, D (author), Bortfeld, Thomas (author), Perko, Z. (author)
This paper investigates the potential of combined proton-photon therapy schemes in radiation oncology, with a special emphasis on fractionation. Several combined modality models, with and without fractionation, are discussed, and conditions under which combined modality treatments are of added value are demonstrated analytically and...
journal article 2019
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Çubukçuoglu, C. (author), Ekici, B. (author), Tasgetiren, M. Fatih (author), Sariyildiz, I.S. (author)
Most of the architectural design problems are basically real-parameter optimization problems. So, any type of evolutionary and swarm algorithms can be used in this field. However, there is a little attention on using optimization methods within the computer aided design (CAD) programs. In this paper, we present Optimus, which is a new...
journal article 2019
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van den Boomen, M. (author), Leontaris, G. (author), Wolfert, A.R.M. (author)
Ageing public infrastructure assets necessitate economic replacement analysis. A common replacement problem concerns an existing asset challenged by a replacement option. Classic techniques obtained from the domain of engineering economics are the mainstream approach to replacement optimization in practice. However, the validity of these classic...
journal article 2019
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Horváth, K. (author), van Esch, B. (author), Vreeken, D. (author), Pothof, I.W.M. (author), Baayen, J (author)
This study presents convex modeling of drainage pumps so that real-time control systems can be implemented to minimize their energy use. A convex model is built based on pump curves and then used in mixed-integer optimization to allow pumps to be turned on or off. It is implemented as an extension to the open source software package RTC-Tools...
journal article 2019
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Santos, Gonçalo Gonçalves Duarte (author), Homem de Almeida Correia, G. (author)
This paper proposes a real-time decision support tool based on the rolling-horizon principle that manages staff activities (relocations and maintenance) of a one-way carsharing system and considers carpooling the staff in the relocated carsharing vehicles for extra cost reduction. The decision support tool is composed of three elements: a...
journal article 2019
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Khakzad Rostami, N. (author)
Effective firefighting of major fires in fuel storage plants can effectively prevent or delay fire spread (domino effect) and eventually extinguish the fire. If the number of firefighting crew and equipment is sufficient, firefighting will include the suppression of all the burning units and cooling of all the exposed units. However, when...
journal article 2018
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Abdullah, A.D.A. (author), Castro Gama, M.E. (author), Popescu, Ioana (author), van der Zaag, P. (author), Karim, Usama F.A. (author), Al Suhail, Qusay (author)
Wastewater effluents from irrigation and the domestic and industrial sectors have serious impacts in deteriorating water quality in many rivers, particularly in areas under tidal influence. There is a need to develop an approach that considers the impact of human and natural causes of salinization. This study uses a multi-objective...
journal article 2018
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van Gemert, J.H.F. (author), Brink, Wyger M. (author), Webb, A. (author), Remis, R.F. (author)
Inhomogeneities in the transmit radio frequency magnetic field ( {\text{B}}-{1}^{+} ) reduce the quality of magnetic resonance (MR) images. This quality can be improved by using high-permittivity pads that tailor the {\text{B}}-{1}^{+} fields. The design of an optimal pad is application-specific and not straightforward and would therefore...
journal article 2018
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Mahmood, Hamayoun (author), Ramzan, Naveed (author), Shakeel, A. (author), Moniruzzaman, Muhammad (author), Iqbal, Tanveer (author), Kazmi, Mohsin Ali (author), Sulaiman, Muhammad (author)
A primitive element for the development of sustainable pyrolysis processes is the study of thermal degradation kinetics of lignocellulosic waste materials for optimal energy conversion. The study presented here was conducted to predict and compare the optimal kinetic parameters for pyrolysis of various lignocellulosic biomass such as wood...
journal article 2018
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Tang, H. (author), Ye, Huai-Yu (author), Chen, Xian Ping (author), Qian, Cheng (author), Fan, Xuejun (author), Zhang, G.Q. (author)
In this paper, the heat transfer performance of the multi-chip (MC) LED module is investigated numerically by using a general analytical solution. The configuration of the module is optimized with genetic algorithm (GA) combined with a response surface methodology. The space between chips, the thickness of the metal core printed circuit board...
journal article 2017
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Koirala, B.P. (author), Chaves Avila, J.P. (author), Gomez, T. (author), Hakvoort, R.A. (author), Herder, P.M. (author)
Integrated community energy systems (ICESs) are emerging as a modern development to re-organize local energy systems allowing simultaneous integration of distributed energy resources (DERs) and engagement of local communities. Although local energy initiatives, such as ICESs are rapidly emerging due to community objectives, such as cost and...
journal article 2016
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Orcesi, André D. (author), Chemineau, Hélène (author), Lin, P.H. (author), van Gelder, P.H.A.J.M. (author), van Erp, H.R.N. (author)
This paper presents an optimization framework for highway infrastructure elements that integrates risk profiles (for infrastructures) and economic aspects. One main goal is to assess the necessary additional effort to satisfy performance constraints under different scenarios of climate change. In order to be easily deployable by national road...
journal article 2016
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Lu, S. (author), Lin, X. (author), Heemink, A.W. (author), Fu, G. (author), Segers, A.J. (author)
Volcanic ash forecasting is a crucial tool in hazard assessment and operational volcano monitoring. Emission parameters such as plume height, total emission mass, and vertical distribution of the emission plume rate are essential and important in the implementation of volcanic ash models. Therefore, estimation of emission parameters using...
journal article 2015
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Vegter, R.J.K. (author), Hartog, J. (author), De Groot, S. (author), Lamoth, C.J. (author), Bekker, M.J. (author), Van der Scheer, J.W. (author), Van der Woude, L.H.V. (author), Veeger, H.E.J. (author)
Background To propel in an energy-efficient manner, handrim wheelchair users must learn to control the bimanually applied forces onto the rims, preserving both speed and direction of locomotion. Previous studies have found an increase in mechanical efficiency due to motor learning associated with changes in propulsion technique, but it is...
journal article 2015
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Van Dijk, H.A.J. (author), Damen, K. (author), Makkee, M. (author), Trapp, C. (author)
In the Nuon/Vattenfall CO2 Catch-up project, a pre-combustion CO2 capture pilot plant was built and operated at the Buggenum IGCC power plant, the Netherlands. The pilot consist of sweet water-gas shift, physical CO2 absorption and CO2 compression. The technology performance was verified and validated models were obtained. This paper describes...
journal article 2014
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Lakerveld, R. (author), Benyahia, B. (author), Heider, P.L. (author), Zhang, H. (author), Braatz, R.D. (author), Barton, P.I. (author)
The judicious use of buffering capacity is important in the development of future continuous pharmaceutical manufacturing processes. The potential benefits are investigated of using optimal-averaging level control for tanks that have buffering capacity for a section of a continuous pharmaceutical pilot plant involving two crystallizers, a...
journal article 2013
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Verschuur, D.J. (author)
Today, the problem of surface-related multiples, especially in shallow water, is not fully solved. Although surface-related multiple elimination (SRME) method has proved to be successful on a large number of data cases, the involved adaptive subtraction acts as a weak link in this methodology, where primaries can be distorted due to their...
journal article 2013
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Fennis, S.A.A.M. (author), Walraven, J.C. (author)
The annual production of Portland cement, estimated at 3.4 billion tons in 2011, is responsible for about 7% of the total worldwide CO2-emission. To reduce this environmental impact it is important to use innovative technologies for the design of concrete structures and mixtures. In this paper, it is shown how particle packing technology can be...
journal article 2012
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Wiebenga, J.H. (author), Van den Boorgaard, A.H. (author), Klaseboer, G. (author)
The coupling of finite element simulations to mathematical optimization techniques has contributed significantly to product improvements and cost reductions in the metal forming industries. The next challenge is to bridge the gap between deterministic optimization techniques and the industrial need for robustness. This paper introduces a...
journal article 2012
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Vermeer, K.A. (author), Lo, B. (author), Zhou, Q. (author), Vos, F.M. (author), Vossepoel, A.M. (author), Lemij, H.G. (author)
Monitoring glaucoma patients and ensuring optimal treatment requires accurate and precise detection of progression. Many glaucomatous progression detection strategies may be formulated for Scanning Laser Polarimetry (SLP) data of the local nerve fiber thickness. In this paper, several strategies, all based on repeated GDx VCC SLP measurements,...
journal article 2011
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