Searched for: subject:"Parameter%5C+estimation"
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Xiao, C. (author), Leeuwenburgh, O. (author), Lin, H.X. (author), Heemink, A. (author)
A reduced order modeling algorithm for the estimation of space varying parameter patterns in numerical models is proposed. In this approach domain decomposition is applied to construct separate approximations to the numerical model in every subdomain. We introduce a new local parameterization that decouples the computational cost of the...
article 2021
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Vijn, A.R.P.J. (author), Baas, O. (author), Lepelaars, E.S.A.M. (author)
The purpose of this article is to estimate the parameters of the Jiles-Atherton hysteresis model, based on minor-loop measurement data in weak applied fields. The well-known hysteresis model by Jiles and Atherton serves as a basis of this article with an extension for the closure of minor loops. In order to represent minor loops correctly, a...
article 2020
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Vijn, A.R.P.J. (author), Lepelaars, E.S.A.M. (author), Dubbeldam, J. (author), van Gijzen, M. (author), Heemink, A. (author)
This paper presents a parameter estimation method to determine the linear behavior of an object constructed of thin plates. Based on the magnetostatic field equations, an integral equation is derived that fully determines the induced magnetization, whenever the spatial magnetic susceptibility distribution is known. This forward problem is used...
article 2019
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van Hoek, R. (author), Alirezaei, M. (author), Schmeitz, A. (author), Nijmeijer, H. (author)
In this paper a Vehicle State Estimator is developed and validated on experimental data from a 2012 Toyota Prius. The estimator is capable of estimating both planar vehicle velocities and the tyre-road friction parameter. Emphasis is placed on the comparison of the commonly used Extended Kalman Filter and a novel application of the State...
article 2017
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Tuma, M. (author), Rorbech, V. (author), Prior, M. (author), Igel, C. (author)
We designed and jointly optimized an integrated signal processing chain for detection and classification of long-range passive-acoustic underwater signals recorded by the global geophysical monitoring network of the Comprehensive Nuclear-Test-Ban Treaty Organization. Starting at the level of raw waveform data, a processing chain of signal...
article 2016
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Polinder, H. (author), Spiekman, M.E. (author), van Dijk, H.A.L. (author)
A next generation of models is needed to guarantee energy performances of buildings and systems in practice. Current energy performance models use assumptions on climate, user behavior, characteristics of building and systems that may deviate from reality. Improvement of the accuracy of these models and assumptions is necessary to better predict...
article 2015
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Cramp, A.J. (author), van den Berg, T.W. (author), Huiskamp, W. (author)
Performance assessment is a key factor in designing distributed simulation environments that are fit-forpurpose and cost-effective. Simulations used for training applications should provide the required level of responsiveness and interactivity. Simulations used for analysis or decision support should execute as fast as possible to enable quick...
conference paper 2014
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Rubingh, C.M. (author), Martens, H. (author), van der Voet, H. (author), Smilde, A.K. (author)
Each data-driven action in data modelling consumes degrees of freedom, whether it concerns estimation of parameters, estimation of meta-parameters or selecting variables. By using a double cross validation approach for degrees of freedom calculation the costs for meta-parameter estimation and variable selection can be determined explicitly. The...
article 2013
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Hanea, A. (author), Hanea, R. (author), Zilko, A. (author)
The objective of reservoir engineering is to optimize hydrocarbon recovery. One of the most common and efficient recovery processes is water injection. The water is pumped into the reservoir in injection wells in order to push the oil trapped in the porous media towards the production wells. The movement of the water front depends on the...
conference paper 2012
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Kessels, J.T.B.A. (author), Rosca, B. (author), Bergveld, H.J. (author), van den Bosch, P.P.J. (author)
Hybrid and electric vehicles require accurate knowledge of the battery to make an educated guess about the expected electric driving range. Range prediction is complicated by the fact that batteries are subject to external influences and aging. Also the future driving behavior is often unknown. This paper presents a model-based identification...
conference paper 2011
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Leeuwenburgh, O. (author), Peters, E. (author), Wilschut, F. (author)
A history matching workflow, as typically used for updating of petrophysical reservoir model properties, is modified to include structural parameters including the top reservoir and several fault properties: position, slope, throw and transmissibility. A simple 2D synthetic oil reservoir produced by waterflooding is used to demonstrate issues...
conference paper 2011
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Sas, B. (author), Spaey, K. (author), Balan, I. (author), Zetterberg, K. (author), Litjens, R. (author)
In mobile cellular networks the handover (HO) algorithm is responsible for determining when calls of users that are moving from one cell to another are handed over from the former to the latter. The admission control (AC) algorithm, which is the algorithm that decides whether new (fresh or HO) calls that enter a cell are allowed to the cell or...
conference paper 2011
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Gryzlov, A. (author), Leskens, M. (author), Mudde, R.F. (author), TNO Industrie en Techniek (author)
An assessment of the time-integration scheme impact on results of data assimilation based on the extended Kalman filter approach is performed. The use of the implicit Euler scheme, which is unconditionally stable for the whole range of time steps both for the model and covariance update, results in a less accurate estimation of permeability...
conference paper 2009
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Leskens, M. (author), de Kruif, B. (author), Belfroid, S.P.C. (author), Smeulers, J.P.M. (author), Gryzlov, A. (author), TNO Industrie en Techniek (author)
Multiphase flow meters are indispensable tools for achieving optimal operation and control of wells as these meters deliver real-time information about their performance. For example, multiphase flow meters located downhole can improve the production of multilateral and multizone wells by timely allocating the zone where a gas or water cone...
conference paper 2008
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Lawniczak, W. (author), Hanea, R.G. (author), Heemink, A.W. (author), McLaughlin, D. (author), Jansen, J.D. (author), TNO Bouw en Ondergrond (author)
Since the first version of Kalman Filter was introduced in 1960 it received a lot of attention in mathematical and engineering world. There are many successful successors like for example Ensemble Kalman Filter (Evensen 1996) which has been applied also for reservoir engineering problems. The method proposed in [Zhou et al. 2007] draws together...
conference paper 2008
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Snijder, H.H. (author), Hoenderkamp, J.C.D. (author), Bakker, M. (author), Steenbergen, H.M.G.M. (author), de Louw, C.H.M. (author), TNO Bouw en Ondergrond (author)
Channel sections are widely used in practice as beams. However, design rules for eccentrically loaded (not through shear centre) beams with channel cross-sections are not available in Eurocode 3. In this paper five proposed design rules are summarised, explained and their validity is checked by Finite Element analyses. The design rules yield...
article 2008
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Verreault, J. (author), DeChamplain, A. (author), Mayer, A.E.H.J. (author), Veraar, R.G. (author), Stowe, R.A. (author), Farinaccio, R. (author), Harris, P.G. (author), TNO Defensie en Veiligheid (author)
This work presents a design for a shock-induced combustion experiment using a two-angle cone configuration. Three injector geometries were considered: a cone surface, a dual stage configuration with rectangular gaps (DSRG) and a cylindrical ramp (CR). Four parameters were investigated: the penetration height, the mixing efficiency, the control...
conference paper 2007
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Groen, E.L. (author), Smaïli, M.H. (author), Hosman, R.J.A.W. (author), TNO Defensie en Veiligheid (author)
In this flight simulator study, eleven pilots rated their motion perception during a series of decrab maneuvers of a twin-engine passenger aircraft. Simulator yaw, sway, and roll motion were varied independently to examine their relative contribution to the pilots’ judgments. In one set of conditions, the washout algorithms were bypassed so as...
article 2007
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Kastelein, R.A. (author), de Haan, D. (author), Verboom, W.C. (author), TNO Defensie en Veiligheid (author)
It is unclear how well harbor porpoises can locate sound sources, and thus can locate acoustic alarms on gillnets. Therefore the ability of a porpoise to determine the location of a sound source was determined. The animal was trained to indicate the active one of 16 transducers in a 16-m -diam circle around a central listening station. The...
article 2007
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Roijers, F. (author), van den Berg, J.L. (author), Fan, X. (author), Fleuren, M.J. (author), TNO Informatie- en Communicatietechnologie (author)
Several studies in literature have investigated the performance of the proposed ieee 802.11e standard for qos differentiation in wlan, but most of them are limited both with respect to the range of the parameter settings and the considered traffic scenarios. The aim of the present study is twofold. First, we systematically investigate the...
article 2006
Searched for: subject:"Parameter%5C+estimation"
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