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Dingemans, L.M. (author), Papadakis, V. (author), Liu, P. (author), Adam, A.J.L. (author), Groves, R.M. (author)
Optical coherence tomography (OCT) is a contactless and non-destructive testing (NDT) technique based on lowcoherence interferometry. It has recently become a popular NDT-tool for evaluating cultural heritage. In this study, protective coatings on wood and their penetration into the wood structure were measured with a customized infrared fiber...
conference paper 2015
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Van Nooyen, R.R.P. (author), Kolechkina, A.G. (author)
In applied hydrology the question of the probability of exceeding a certain value occurs regularly. Often it is in a context where extrapolation from a relatively short time series is needed. It is well known that in its simplest form extreme value theory applies to independent identically distributed random variables. It is also well known that...
conference paper 2012
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Bociort, F. (author), Van Turnhout, M. (author), Marinescu, O. (author)
Saddle-point construction (SPC) is a new method to insert lenses into an existing design. With SPC, by inserting and extracting lenses new system shapes can be obtained very rapidly, and we believe that, if added to the optical designer’s arsenal, this new tool can significantly increase design productivity in certain situations. Despite the...
conference paper 2007
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Koutrouvelis, A. (author), Hendriks, R.C. (author), Jensen, J (author), Heusdens, R. (author)
We propose a new multi-microphone noise reduction technique for binaural cue preservation of the desired source and the interferers. This method is based on the linearly constrained minimum variance (LCMV) framework, where the constraints are used for the binaural cue preservation of the desired source and of multiple interferers. In this...
conference paper 2016
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Van de Sande, S.A.H. (author), Uijttewaal, W.S.J. (author), Verheij, H.J. (author)
Granular filters are used for protection against scour and erosion of base material. For a proper functioning it is necessary that at the interfaces between the filter structure, the subsoil and the water flowing above the filter structure no material will be transported. Different types of granular filters can be distinguished, this paper...
conference paper 2014
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Wilding, D. (author), Pozzi, P. (author), Soloviev, O.A. (author), Vdovine, Gleb (author), Verhaegen, M.H.G. (author)
Aberrations, scattering and absorption degrade the performance light-sheet fluorescence microscopes (LSFM). An adaptive optics system to correct for these artefacts and to optimize the light-sheet illumination is presented. This system allows a higher axial resolution to be recovered over the field-of-view of the detection objective. It is...
conference paper 2016
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Marinescu, O. (author), Bociort, F. (author), Braat, J. (author)
When Extreme Ultraviolet mirror systems having several high-order aspheric surfaces are optimized, the configurations often enter into highly unstable regions of the parameter space. Small changes of system parameters lead then to large changes in ray paths, and therefore optimization algorithms crash because certain sssumptions upon which they...
conference paper 2004
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Bociort, F. (author), Van Turnhout, M. (author)
Finding multiple local minima in the merit function landscape of optical system optimization is a difficult task, especially for complex designs that have a large number of variables. We discuss here a method that enables a rapid generation of new local minima for optical systems of arbitrary complexity. We have recently shown that saddle points...
conference paper 2005
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Babuska, R. (author), Sousa, J. (author), Verbruggen, H.B. (author)
conference paper 1995
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Bociort, F. (author), Van Turnhout, M. (author)
In present-day optical system design, it is tacitly assumed that local minima are points in the merit function landscapewithout relationships between them. We will show however that there is a certain degree of order in the design landscapeand that this order is best observed when we change the dimensionality of the optimization problem and when...
conference paper 2006
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Wang, H. (author), Van Mieghem, P. (author)
conference paper 2008
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Marinescu, O. (author), Bociort, F. (author)
The multidimensional merit function space of complex optical systems contains a large number of local minima that are connected via links that contain saddle points. In this work, we illustrate a method to construct such saddle points with examples of deep UV objectives and extreme UV mirror systems for lithography. The central idea of our...
conference paper 2005
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Bischiniotis, K. (author), Kanning, W. (author), Jonkman, S.N. (author)
This research focuses on the optimization of river dikes using probabilistic methods. Its aim is to develop a generic method that automatically estimates the failure probabilities of many river dike cross-sections and gives the one with the least cost, taking into account the boundary conditions and the requirements that are set by the user....
conference paper 2014
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Karimi Nejadasl, F. (author), Gorte, B.G.H. (author), Hoogendoorn, S.P. (author), Snellen, M. (author)
conference paper 2008
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Marinescu, O. (author), Bociort, F. (author)
The merit function space of mirror systems for EUV lithography is studied. Local minima situated in a multidimensional merit function space are connected via links that contain saddle points and form a network. In this work we present the first networks for EUV lithographic objectives and discuss how these networks change when control parameters...
conference paper 2005
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Jeliazkov, M. (author), Sardar Abadi, P.M. (author), Lopes, C.S. (author), Abdalla, M.M. (author), Peeters, D.M.J. (author)
A computationally efficient two-level design methodology is developed for the optimization of stiffened compression loaded panels having variable stiffness panels as their skin. In the first step extensive bay panel optimization is performed using a Rayleigh-Ritz energy method coupled with a specialized Genetic Algorithm. Results in agreement...
conference paper 2015
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De Wit, A.J. (author), Van Keulen, A. (author)
Multi-level optimization and multi-disciplinary optimization are areas of research that are concerned with developing efficient analysis and optimization techniques for complex systems that are made up of coupled elements (components). Within the field of multilevel optimization and multi-disciplinary optimization a large number of techniques...
conference paper 2010
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Urbach, H.P. (author), Pereira, S.F. (author), Broer, D.J. (author)
We determine field distributions in the pupil of a high NA lens, that give, for a given power incident on the lens, the maximum electric field amplitude in focus in a specific direction. We consider in particular the cases of maximum longitudinal and maximum transverse components. The distribution of the maximum longitudinal component in the...
conference paper 2009
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Arnold, M. (author), Negenborn, R.R. (author), Andersson, G. (author), De Schutter, B. (author)
The optimal operation of an integrated electricity and natural gas infrastructure is investigated. The couplings between the electricity system and the gas system are modeled by so-called energy hubs, which represent the interface between the loads on the one hand and the transmission infrastructures on the other. To increase reliability and...
conference paper 2009
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Van den Hof, P.M.J. (author), Jansen, J.D. (author), Van Essen, G.M. (author), Bosgra, O.H. (author)
Due to urgent needs to increase efficiency in oil recovery from subsurface reservoirs new technology is developed that allows more detailed sensing and actuation of multiphase flow properties in oil reservoirs. One of the examples is the controlled injection of water through injection wells with the purpose to displace the oil in an appropriate...
conference paper 2009
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