Searched for: subject%3A%22reducing%22
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Colling, A.P. (author), Hekkenberg, R.G. (author)
The potential to implement the concept of waterborne platooning in the European short sea transportation system is currently being explored. In the concept, a platoon is referred to as a “Vessel Train” (VT). A VT is composed of a fully manned lead vessel and a number of follower vessels. The lead vessel takes over the navigational and...
journal article 2020
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Cassamo, Nassir (author), van Wingerden, J.W. (author)
The high dimensions and governing non-linear dynamics in wind farm systems make the design of numerical optimal controllers computationally expensive. A possible pathway to circumvent this challenge lies in finding reduced order models which can accurately embed the existing non-linearities. The work presented here applies the ideas motivated...
journal article 2020
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Sarma, R. (author), Dwight, R.P. (author), Viré, A.C. (author)
Downwind wind turbine blades are subjected to tower wake forcing at every rotation, which can lead to structural fatigue. Accurate characterisation of the unsteady aeroelastic forces in the blade design phase requires detailed representation of the aerodynamics, leading to computationally expensive simulation codes, which lead to intractable...
journal article 2020
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Rocha, I.B.C.M. (author), van der Meer, F.P. (author), Sluys, Lambertus J. (author)
This work presents a reduced-order modeling framework that precludes the need for offline training and adaptively adjusts its lower-order solution space as the analysis progresses. The analysis starts with a fully-solved step and elements are clustered based on their strain response. Elements with the highest strains are solved with a local...
journal article 2020
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Vandecasteele, Kaat (author), De Cooman, Thomas (author), Dan, Jonathan (author), Cleeren, Evy (author), Van Huffel, Sabine (author), Hunyadi, Borbala (author), Van Paesschen, Wim (author)
Objective: Seizure diaries kept by patients are unreliable. Automated electroencephalography (EEG)-based seizure detection systems are a useful support tool to objectively detect and register seizures during long-term video-EEG recording. However, this standard full scalp-EEG recording setup is of limited use outside the hospital, and a...
journal article 2020
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Delissen, A.A.T.M. (author), van Keulen, A. (author), Langelaar, Matthijs (author)
In many engineering applications, the dynamic frequency response of systems is of high importance. In this paper, we focus on limiting the extreme values in frequency response functions, which occur at the eigenfrequencies of the system, better known as resonant peaks. Within an optimization, merely sampling the frequency range and limiting the...
journal article 2020
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Henneman, Lucas R. F. (author), Dedoussi, I.C. (author), Casey, Joan A. (author), Choirat, Christine (author), Barrett, Steven R. H. (author), Zigler, Corwin M. (author)
Expanded use of reduced complexity approaches in epidemiology and environmental justice investigations motivates detailed evaluation of these modeling approaches. Chemical transport models (CTMs) remain the most complete representation of atmospheric processes but are limited in applications that require large numbers of runs, such as those that...
journal article 2020
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Rocha, I.B.C.M. (author), Kerfriden, P. (author), van der Meer, F.P. (author)
Although being a popular approach for the modeling of laminated composites, mesoscale constitutive models often struggle to represent material response for arbitrary load cases. A better alternative in terms of accuracy is to use the FE<sup>2</sup> technique to upscale microscopic material behavior without loss of generality, but the...
journal article 2020
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Mozaffarzadeh, M. (author), Soozande, M. (author), Fool, F. (author), Pertijs, M.A.P. (author), Vos, H.J. (author), Verweij, M.D. (author), Bosch, Johan G. (author), de Jong, N. (author)
Recently, we realized a prototype matrix transducer consisting of 48 rows of 80 elements on top of a tiled set of Application Specific Integrated Circuits (ASICs) implementing a row-level control connecting one transmit/receive channel to an arbitrary subset of elements per row. A fully sampled array data acquisition is implemented by a...
journal article 2020
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Alsayyari, F.S. (author), Tiberga, M. (author), Perko, Z. (author), Lathouwers, D. (author), Kloosterman, J.L. (author)
We use a novel nonintrusive adaptive Reduced Order Modeling method to build a reduced model for a molten salt reactor system. Our approach is based on Proper Orthogonal Decomposition combined with locally adaptive sparse grids. Our reduced model captures the effect of 27 model parameters on k<sub>eff</sub> of the system and the spatial...
journal article 2020
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Geyer, A. (author), Pelinovsky, Dmitry E. (author)
We show that the peaked periodic traveling wave of the reduced Ostrovsky equations with quadratic and cubic nonlinearity is spectrally unstable in the space of square integrable periodic functions with zero mean and the same period. We discover that the spectrum of a linearized operator at the peaked periodic wave completely covers a closed...
journal article 2020
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Viola, Irene (author), Cesar, Pablo (author)
Point cloud representation has seen a surge of popularity in recent years, thanks to its capability to reproduce volumetric scenes in immersive scenarios. New compression solutions for streaming of point cloud contents have been proposed, which require objective quality metrics to reliably assess the level of degradation introduced by coding...
journal article 2020
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van Gemert, J.H.F. (author)
This dissertation describes how to design dielectric pads that can be used to increase image quality in Magnetic Resonance Imaging, and how to accelerate image reconstruction times using a preconditioner.<br/><br/>Image quality is limited by the signal to noise ratio of a scan. This ratio is increased for higher static magnetic field strengths...
doctoral thesis 2019
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Rocha, I.B.C.M. (author)
Although being a crucial step in structural design of laminated composites, prediction of their long-term mechanical performance remains a challenging task for which no comprehensive and reliable solution is currently available. Nevertheless, structures such as wind turbine blades, of which laminated composites constitute the main load bearing...
doctoral thesis 2019
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Sajadi, B. (author), Wahls, S. (author), Hemert, Simon van (author), Belardinelli, P. (author), Steeneken, P.G. (author), Alijani, F. (author)
Despite numerous theoretical investigations on the mechanical properties of graphene, an accurate identification of its material behavior is still unattained. One hypothesis for this uncertainty is that modeling graphene as a static membrane cannot describe the strong coupling between mechanics and thermodynamics of this structure. Therefore,...
journal article 2019
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Rocha, I.B.C.M. (author), van der Meer, F.P. (author), Raijmaekers, S. (author), Lahuerta, F. (author), Nijssen, R. P.L. (author), Mikkelsen, L. P. (author), Sluys, Lambertus J. (author)
This work investigates hygrothermal aging degradation of unidirectional glass/epoxy composite specimens through a combination of experiments and numerical modeling. Aging is performed through immersion in demineralized water. Interlaminar shear testes are performed after multiple conditioning times and after single immersion/redrying cycles....
journal article 2019
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Bailey, O. (author), Arnot, T. C. (author), Blokker, E. J.M. (author), Kapelan, Z. (author), Vreeburg, J. (author), Hofman, J. A.M.H. (author)
Population growth and climate change place a strain on water resources; hence, there are growing initiatives to reduce household water use. UKWIR (2016) have a stated aim to halve water abstraction by 2050. This will significantly reduce inflow to sewer systems and increase wastewater concentration. This work presents a new stochastic sewer...
journal article 2019
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Khouzani, Mahdi Kiani (author), Bahrami, Abbas (author), Hosseini-Abari, Afrouzossadat (author), Khandouzi, Meysam (author), Taheri, P. (author)
This paper investigates a severe microbiologically influenced failure in the elbows of a buried amine pipeline in a petrochemical plant. Pipelines can experience di_erent corrosion mechanisms, including microbiologically influenced corrosion (MIC). MIC, a form of biodeterioration initiated by microorganisms, can have a devastating impact on...
journal article 2019
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Cavalca, L. (author), Zecchin, Sarah (author), Zaccheo, Patrizia (author), Abbas, B.A. (author), Rotiroti, Marco (author), Bonomi, Tullia (author), Muyzer, Gerard (author)
Arsenic contamination of groundwater aquifers is an issue of global concern. Among the affected sites, in several Italian groundwater aquifers arsenic levels above the WHO limits for drinking water are present, with consequent issues of public concern. In this study, for the first time, the role of microbial communities in metalloid cycling...
journal article 2019
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Chen, Y. (author), Voskov, D.V. (author)
The current situation with green gas emission requires the development of low-carbon energy solutions. However, a significant part of the modern energy industry still relies on fossil fuels. To combine these two contradictory targets, we investigate a strategy based on a combination of CO<sub>2</sub> sequestration with enhanced oil recovery ...
journal article 2019
Searched for: subject%3A%22reducing%22
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