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Henderson, A. (author)Digitale signaalbewejing komt steeds meer in de belangstelling. Niet alleen de digitale filters zijn in opmars, ook bij computergerichte netwerkanalyse komt men in aanraking met discrete signalen. Bij de bestudering van deze stof wordt men getroffen door de analogie met de theorie van de continue signalen, zoals schakelverschijnselen,...book 1991
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Davidse, J. (author)Een aanzienlijk deel van de stof in dit boek heeft betrekking op schakelingen voor de versterking van elektrische signalen. Men kan goede argumenten aanvoeren voor de stelling dat versterking de meest fundamentele elektronische signaalbewerkingsfunctie is. De moderne elektronica maakt in toenemende mate gebruik van digitale technieken voor de...book 1991
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Eland, E.N. (author), Mehrotra, Shubham (author), Karmakar, S. (author), van Veldhoven, Robert (author), Makinwa, K.A.A. (author)Zoom ADCs combine a coarse SAR ADC with a fine delta-sigma modulator (?SM) to efficiently obtain high energy efficiency and high dynamic range. This makes them well suited for use in various instrumentation and audio applications. However, zoom ADCs also have drawbacks. The use of over-ranging in their fine modulators may limit SNDR, large...book chapter 2023
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Van Ormondt, D. (author), De Beer, R. (author), Van der Veen, J.W.C. (author), Sima, D.M. (author), Graveron-Demilly, D. (author)MRI-scanners enable non-invasive, in vivo quantitation of metabolites in, e.g., the brain of a patient. Among other things, this requires adequate estimation of the unknown temporal decay function of the complex-valued signal emanating from the metabolites. We propose a method to render a current decay estimator more simple, accurate, and robust...conference paper 2015
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- Vissinga, M. (author), Van den Berg, P.M. (author), Fokkema, J.T. (author) conference paper 1990
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De Sonneville, B. (author), Van Velzen, G. (author), Verheij, H.J. (author), Dorst, K. (author)Traditional guidelines on rock protection at circular piers predominantly focus on preventing shear failure (by choosing a sufficiently large rock size), winnowing failure (by designing an appropriate filter) and edge failure (by selecting a sufficient extent). In particular areas (e.g. in an eroding river channel or in an area with large-scale...conference paper 2012
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Bozdag, V.E. (author), Timmermans, J.F.C. (author)Cloud services such as Facebook and Google search started to use personalization algorithms in order to deal with growing amount of data online. This is often done in order to reduce the “information overload”. User’s interaction with the system is recorded in a single identity, and the information is personalized for the user using this...conference paper 2001
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Emadi, A. (author), Grabarnik, S. (author), Wu, H. (author), De Graaf, G. (author), Hedsten, K. (author), Enoksson, P. (author), Correia, J.H. (author), Wolffenbuttel, R.F. (author)This paper reports on the functional and spectral characterization of a microspectrometer based on a CMOS detector array covered by an IC-Compatible Linear Variable Optical Filter (LVOF). The Fabry-Perot LVOF is composed of 15 dielectric layers with a tapered middle cavity layer, which has been fabricated in an IC-Compatible process using resist...conference paper 2010
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Planar velocity & concentration measurements in a magnetic micromixer with interface front detectionErgin, F.G. (author), Watz, B.B. (author), Erglis, K. (author), Cebers, A. (author)Mixing is often a challenge in small scales and substantial research effort is focused on designing high performance micromixers. Active micromixers use various forces to enhance mixing efficiency. Among these, magnetic forces are often preferred as they are non-contact and do not require manufacturing of small moving parts in the microchannel....conference paper 2013
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Abd Rahman, M.Z. (author), Gorte, B.G.H. (author)A high resolution Airborne LiDAR data creates better opportunity for an individual tree measurement and provides valuable results for more precise forest inventory. This paper presents tree filtering approach that able to separate dominant tree and undergrowth vegetation. The results can be used for a detailed individual tree measurement. This...conference paper 2008
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Ayerden, N.P. (author), Ghaderi, M. (author), De Graaf, G. (author), Wolffenbuttel, R.F. (author)The design, fabrication and characterization of a highly integrated optical gas sensor is presented. The gas cell takes up most of the space in a microspectrometer and is the only component that has so far not been miniaturized. Using the tapered resonator cavity of a linear variable optical filter as a gas cell enables ultimate miniaturization,...conference paper 2015
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De Wilde, J. (author)To account for meso-scale phenomena in coarse grid simulations, correlation terms appearing in the filtered gas-solid flow equations have to be modeled. Filtered models for the gas-solid momentum transfer are focused on. The latter consists of the drag force on the one hand and the distribution of the gas phase pressure gradient over the phases...conference paper 2006
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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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Moon, Y.J. (author), Bae, Y.M. (author), Cho, M.H. (author)In the present study, aerodynamic noise from a forward-facing step is numerically investigated for Reynolds number based on the step height, Reh=8,000 and flow Mach number, M=0.03. A three-dimensional flow over the forward-facing step is calculated by the incompressible large eddy simulation (LES), while its acoustic field is solved by the...conference paper 2006
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Verheij, H.J. (author), Hoffmans, G. (author), Dorst, K. (author), Van de Sande, S. (author)Granular filters are used for protection of structures against scour and erosion. For a proper functioning it is necessary that the interfaces between the filter structure, the subsoil and the water flowing above the filter structure are stable. Stability means that there is no transport of subsoil material through the filter to the water above...conference paper 2012
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We propose a new definition of the length scale in an eddy-viscosity model for large-eddy simulations (LES). This formulation extends and generalizes a previous proposal [Piomelli, Rouhi and Geurts, Proc. ETMM10, 2014], in which the LES length scale was expressed in terms of the integral length-scale of turbulence determined by the flow...conference paper 2015
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Emadi, A. (author), Wu, H. (author), De Graaf, G. (author), Wolffenbuttel, R.F. (author)This paper reports on a CMOS-Compatible Linear Variable Optical Filter (LVOF) visible micro-spectrometer. The CMOS-compatible post process for fabrication of the LVOF has been used for integration of the LVOF with a CMOS chip containing a 128-element photodiode array and readout circuitry. Fabrication of LVOF involves a process for fabrication...conference paper 2010
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Allouche, N. (author), Simons, D.G. (author), Rietveld, L.C. (author)A novel instrument is developed to acoustically image sand filters used for water treatment and monitor their performance. The instrument consists of an omnidirectional transmitter that generates a chirp with a frequency range between 10 and 110 kHz, and an array of hydrophones. The instrument was extensively tested in a lab before being...conference paper 2012
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Ghaderi, M. (author), Ayerden, N.P. (author), De Graaf, G. (author), Wolffenbuttel, R.F. (author)The design and CMOS-compatible fabrication of airgap-based optical filters in a surface micromachining process with sacrificial release using thevapour phase is presented. An airgap-dielectric layer combination offers a higher refractive index contrast, as compared to the conventional all-dielectriclayer based filters, which results in a higher...conference paper 2015
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Bosma, C. (author), Verhagen, H.J. (author), D'Angremond, K. (author), Sint Nicolaas, W. (author)The paper describes the use of two fundamental design parameters, the void porosity and layer thickness in rock armour constructions. These design parameters are very sensible for factors such as the boundary definition of a rock layer, rock production properties, intrinsic properties and construction properties. Differences in the value of the...conference paper 2002