Searched for: subject:"Variability"
(1 - 20 of 170)

Pages

document
Labans, E. (author), Bisagni, C. (author)
The ability to steer carbon fibre tapes, varying the tow angle, can widen the designs possibilities of cylindrical shells that are one of the main components of aerospace structures. This research presents experimental and numerical investigation of two carbon fibre reinforced plastic cylindrical shells – a cylinder with conventional layup made...
journal article 2019
document
Peeters, D.M.J. (author), Irisarri, François Xavier (author), Groenendijk, Chris (author), Růžek, Roman (author)
Composite materials are finding increasing application, for example in commercial aircraft. Traditionally fiber angles are restricted to 0°,±45° and 90°. The current work exploits the possibility of using multiple ’non-conventional’ laminates where either fiber steering (‘variable stiffness’), ply drops (‘variable thickness’), or a...
journal article 2019
document
Giovani Pereira Castro, S. (author), Donadon, Maurício V. (author), Guimarães, Thiago A.M. (author)
The increasing need for automatic mesh generation has led to the development of efficient triangulation algorithms that are able to discretize any 2D or 3D domain. Modern finite element formulations based on strain smoothing techniques (SFEM) provide enhanced convergence properties, preventing yet the stiffening behavior of triangular meshes....
journal article 2019
document
van de Weg, G.S. (author), Hegyi, A. (author), Hoogendoorn, S.P. (author), De Schutter, B.H.K. (author)
Freeway congestion can reduce the freeway throughput due to the capacity drop or due to blocking caused by spillback to upstream ramps. Research has shown that congestion can be reduced by the application of ramp metering and variable speed limits. Model predictive control is a promising strategy for the optimization of the ramp metering...
journal article 2019
document
Digna, R.F.M.O. (author), Castro Gama, M.E. (author), van der Zaag, P. (author), Mohamed, Yasir A. (author), Corzo, Gerald (author), Uhlenbrook, S. (author)
The Eastern Nile Basin is facing a number of transboundary issues, including water resources development, and the associated impacts. The Nile Basin, particularly the Eastern Nile Sub-basin, is considered as one of a few international river systems of potential conflicts between riparian countries. The Eastern Nile is characterized by the...
journal article 2018
document
Toodesh, R. (author), Verhagen, A.A. (author)
The spatial sampling often used to process and represent bathymetric data are of fixed grid resolution where the least depth value is stored in each grid cell. This results in Digital Elevation Models (DEMs) that are used to depict the underlying features of the seafloor. With the discretion of the user, the resulting DEMs used may either be...
journal article 2018
document
Radermacher, M. (author), de Schipper, M.A. (author), Price, Timothy (author), Huisman, B.J.A. (author), Aarninkhof, S.G.J. (author), Reniers, A.J.H.M. (author)
The behaviour of subtidal sandbars can be strongly influenced by the introduction of sand nourishments in the coastal system. This study focuses on the impact of nourishments on subtidal bar behaviour at spatio-temporal scales beyond a single nourishment project. It aims to determine the long-term behaviour of subtidal sandbars along an entire...
journal article 2018
document
van Westen, René M. (author), Dijkstra, Henk A. (author), Klees, R. (author), Riva, R.E.M. (author), Slobbe, D.C. (author), van der Boog, C.G. (author), Katsman, C.A. (author), Candy, A.S. (author), Pietrzak, J.D. (author), Zijlema, M. (author), James, Rebecca K. (author), Bouma, Tjeerd J. (author)
The Yucatan Channel connects the Caribbean Sea with the Gulf of Mexico and is the main outflow region of the Caribbean Sea. Moorings in the Yucatan Channel show high-frequent variability in kinetic energy (50–100 days) and transport (20–40 days), but the physical mechanisms controlling this variability are poorly understood. In this study, we...
journal article 2018
document
Peeters, D.M.J. (author), Lozano, Gustavo Gonzalez (author), Abdalla, M.M. (author)
A method to optimise the fibre angle distribution of variable stiffness laminates is proposed. The proposed method integrates a fibre angle retrieval step with a fibre angle optimisation procedure. A multi-level approximation approach is used in combination with the method of successive approximations. First, fibre angle retrieval is done by...
journal article 2018
document
Prendergast, L.J. (author), Reale, C. (author), Gavin, K. (author)
The trend for development in the offshore wind sector is towards larger turbines in deeper water. This results in higher wind and wave loads on these dynamically sensitive structures. Monopiles are the preferred foundation solution for offshore wind structures and have a typical expected design life of 20 years. These foundations have strict...
journal article 2018
document
Swart, T.G. (author), Weber, J.H. (author)
We present a systematic variable-to-fixed (VF) length scheme encoding binary information sequences into binary balanced sequences. The redundancy of the proposed scheme is larger than the redundancy of the best fixed-to-fixed (FF) length schemes in case of long codes, but it is smaller in case of short codes. The biggest advantage comes from...
journal article 2018
document
van Engelenburg, S.H. (author), Janssen, M.F.W.H.A. (author), Klievink, A.J. (author)
Context-awareness refers to the ability to sense and adapt to context. With the rise of context-aware systems, designers are struggling with what variables should be sensed from the context. According to the definitions found in the literature, whether something belongs to context, has to do with whether it is relevant. However, what it means to...
conference paper 2018
document
Dominguez Frejo, J.R. (author), Papamichail, Ioannis (author), Papageorgiou, Markos (author), De Schutter, B.H.K. (author)
This paper proposes a new macroscopic model for Variable Speed Limits (VSLs), combining characteristics of previously proposed models, in order to have the capability of modeling different capacities, critical densities, and levels of compliance for links affected by speed limits. Moreover, the effects of VSLs on the fundamental diagram of...
conference paper 2018
document
Beekers, D.I. (author), van Rooij, Tom (author), van der Steen, A.F.W. (author), de Jong, N. (author), Verweij, M.D. (author), Kooiman, Klazina (author)
Ultrasound contrast agents consist of gas-filled coated microbubbles that oscillate upon ultrasound insonification. Their characteristic oscillatory response provides contrast enhancement for imaging and has the potential to locally enhance drug delivery. Since microbubble response depends on the local acoustic pressure, an ultrasound...
journal article 2018
document
Hunnekens, Bram (author), Kamps, Sjors (author), van de Wouw, N. (author)
In this paper, we introduce a variable-gain control strategy for mechanical ventilators in the respiratory systems. Respiratory systems assist the patients who have difficulty breathing on their own. For the comfort of the patient, fast pressure buildup (and release) and a stable flow response are desired. However, linear controllers...
journal article 2018
document
Alibekov, Eduard (author), Kubalik, Jiri (author), Babuska, R. (author)
This paper addresses the problem of deriving a policy from the value function in the context of critic-only reinforcement learning (RL) in continuous state and action spaces. With continuous-valued states, RL algorithms have to rely on a numerical approximator to represent the value function. Numerical approximation due to its nature virtually...
journal article 2018
document
van der Krogt, M.G. (author), Schweckendiek, T. (author), Kok, M. (author)
Transformation models are used to infer geotechnical properties from indirect measurements. A site-specific transformation model can be calibrated with direct and indirect measurements from a site. When such a model is used, then spatial variability, measurement errors and statistical uncertainty propagate into the uncertainty of the spatial...
journal article 2018
document
Peeters, D.M.J. (author), Hong, Z. (author), Abdalla, M.M. (author)
A way to approximate the compliance of composites for optimisation is described. A two-level approximation scheme is proposed inspired by traditional approximation concepts such as force approximations and convex linearisation. In level one, an approximation in terms of the reciprocal in-plane stiffness matrix is made. In level two, either...
journal article 2018
document
Fu, W. (author), van Paassen, M.M. (author), Mulder, M. (author)
Wave-variable transformation is a means to maintain stability of haptic teleoperation in the presence of communication time delays. Its drawback is that it affects haptic perception of remote properties and thereby degrades transparency. This paper studies the effect of wave-variable transformation on human haptic perception. Based on a...
conference paper 2018
document
Moreno Rodenas, A. (author), Cecinati, Francesca (author), Langeveld, J.G. (author), Clemens, F.H.L.R. (author)
Integrated Catchment Modelling aims to simulate jointly urban drainage systems, wastewater treatment plant and rivers. The effect of rainfall input uncertainties in the modelling of individual urban drainage systems has been discussed in several studies already. However, this influence changes when simultaneously simulating several urban...
journal article 2017
Searched for: subject:"Variability"
(1 - 20 of 170)

Pages