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Chai, X. (author), Rozsas, A. (author), Slobbe, A. (author), Teixeira, A. (author)This paper investigates the impact of structural health monitoring (SHM) on the failure probability of a simulated sheet pile wall system. We use Bayesian statistics to estimate non-directly observable soil parameters from measured structural responses. These estimates are used to calculate the failure probability of the structure against...article 2022
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Sabbadini, A. (author), Massaad, J. (author), van Neer, P.L.M.J. (author), de Jong, N. (author), Verweij, M.D. (author)In recent years, several fitting techniques have been presented to reconstruct the parameters of a plate from its Lamb wave dispersion curves. Published studies show that these techniques can yield high accuracy results and have the potential of reconstructing several parameters at once. The precision with which parameters can be reconstructed...article 2022
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- Massaad, J. (author), van Neer, P.L.M.J. (author), van Willigen, D.M. (author), Sabbadini, A. (author), de Jong, N. (author), Pertijs, M.A.P. (author), Verweij, M.D. (author) article 2022
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Rozsas, A. (author), Slobbe, A. (author), Martini, G. (author), Jansen, R. (author)This paper describes a static diagnostic load testing and measurement campaign of a reinforced concrete road bridge in Amsterdam. We consider 29 vertical translation sensors and 37 strain sensors. Multiple Bayesian parameter estima tions are performed to estimate two structural and two load parameters of a three-dimensional finite element (FE)...article 2022
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Massaad, J. (author), van Neer, P.L.M.J. (author), van Willigen, D.M. (author), Sabbadini, A. (author), de Jong, N. (author), Pertijs, M.A.P. (author), Verweij, M.D. (author)Current ultrasonic clamp-on flow meters consist of a pair of single-element transducers which are carefully positioned before use. This positioning process consists of manually finding the distance between the transducer elements, along the pipe axis, for which maximum SNR is achieved. This distance depends on the sound speed, thickness and...article 2021
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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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Walser, T. (author), Meyer, D. (author), Fransman, W. (author), Buist, H. (author), Kuijpers, E. (author), Brouwer, D. (author)Life-Cycle Assessment (LCA) is a well-established method to evaluate impacts of chemicals on the environment and human health along the lifespan of products. However, the increasingly produced and applied nanomaterials (defined as one dimensionarticle 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