Searched for: subject%3A%22Inversion%22
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Vijn, A. (author), Peet, B.J. (author), Schaaphok, M. (author), Lepelaars, E. (author), Heemink, A. (author)
This paper presents a hybrid model to estimate the magnetic behaviour of a ferromagnetic structure. The mathematical-physical model has been developed using the Method of Moments combined with a hysteresis model. The mathematical model was derived by a linearisation of the hysteresis curve. The initial magnetic state of a ferromagnetic object is...
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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Candela, T.G.G. (author), Pluymaekers, M.P.D. (author), Ampuero, J.P. (author), Wees, J.D.A.M. (author), Buijze, L. (author), Wassing, B.B.T. (author), Osinga, S. (author), Grobbe, N. (author), Muntendam-Bos, A.G. (author)
The induced seismicity in the Groningen gas field, The Netherlands, presents contrasted spatio temporal patterns between the central area and the south west area. Understanding the origin of this contrast requires a thorough assessment of two factors: (1) the stress development on the Groningen faults and (2) the frictional response of the...
article 2022
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Candela, T.G.G. (author), Chitu, A.G. (author), Peters, E. (author), Pluymaekers, M.P.D. (author), Hegen, D. (author), Koster, K. (author), Fokker, P.A. (author)
Surface movement can be induced by many human subsurface activities: production of natural gas, geothermal heat extraction, ground water extraction, phreatic groundwater level lowering, storage of natural gas and CO2. In this manuscript, we focus on subsidence caused by gas production. While geological interpretations, seismic campaigns and flow...
article 2022
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Kaminski, T. (author), Scholze, M. (author), Rayner, P. (author), Houweling, S. (author), Vossbeck, M. (author), Silver, J. (author), Lama, S. (author), Buchwitz, M. (author), Reuter, M. (author), Knorr, W. (author), Chen, H.W. (author), Kuhlmann, G. (author), Brunner, D. (author), Dellaert, S.N.C. (author), Denier van der Gon, H.A.C. (author), Super, I. (author), Loscher, A. (author), Meijer, Y. (author)
The European Copernicus programme plans to install a constellation of multiple polar orbiting satellites (Copernicus Anthropogenic CO2 Monitoring Mission, CO2M mission) for observing atmospheric CO2 content with the aim to estimate fossil fuel CO2 emissions. We explore the impact of potential CO2M observations of column-averaged CO2 (XCO2),...
article 2022
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Piedvache, A. (author), van Buuren, S. (author), Barros, H. (author), Ribeiro, A.I. (author), Draper, E. (author), Zeitlin, J. (author), EPICE Research group, (author)
Background: Loss to follow-up is a major challenge for very preterm (VPT) cohorts; attrition is associated with social disadvantage and parents with impaired children may participate less in research. We investigated the impact of loss to follow-up on the estimated prevalence of neurodevelopmental impairment in a VPT cohort using different...
article 2021
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Szenasi, B. (author), Berchet, A. (author), Broquet, G. (author), Segers, A.J. (author), Denier van der Gon, H.A.C. (author), Krol, M. (author), Hullegie, J.J.S. (author), Kiesow, A. (author), Gunther, D. (author), Roxana Petrescu, A.M. (author), Saunois, M. (author), Bousquet, P. (author), Pison, I. (author)
This study aims at estimating errors to be accounted for in atmospheric inversions of methane (CH4) emissions at the European scale. Four types of errors are estimated in the concentration space over the model domain and at selected measurement sites. Furthermore, errors in emission inventories are estimated at country and source sector scales....
article 2021
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Weemstra, C. (author), de Laat, J.I. (author), Verdel, A. (author), Smets, P. (author)
Instrumental timing and phase errors are a notorious problem in seismic data acquisition and processing. These can be frequency independent, for example due to clock drift, but may also be frequency dependent, for example due to imperfectly known instrument responses. A technique is presented that allows both types of errors to be recovered in a...
article 2021
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de Jong, N.J. (author), Otten, M.P.G. (author), Cuenca, M.C. (author), Uysal, F. (author), de Wit, J.J.M. (author)
This paper investigates the benefits of multichannel processing for inverse synthetic aperture radar (ISAR) imaging. There are potential advantages of multichannel processing in radar systems, for example, improved motion estimation, clutter suppression, extraction of supporting information, such as sea wave direction and speed, and ship wake...
conference paper 2021
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Super, I. (author), Dellaert, S.N.C. (author), Tokaya, J.P. (author), Schaap, M. (author)
Constraining urban emissions is gaining more attention because of the important role of cities in reaching na tional climate mitigation targets. Urban inverse modelling studies could constrain emissions of large hotspots, but still face many challenges. It has been argued that more detailed information is needed on both atmospheric transport and...
article 2021
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Bekesi, E. (author), Fokker, P.A. (author), Martins, J.E. (author), Norini, G. (author), van Wees, J.-D. (author)
We investigate ground movements induced by the 8 February 2016, Mw=4.2 earthquake at the Los Humeros Geothermal Field (Mexico) using Sentinel-1 radar interferometry. Previous estimated focal mechanism solution based on seismic data with a hypocentral depth of 1900 m could not resolve the measured coseismic surface deformation pattern. In this...
article 2021
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Peter, C. (author), Borello, E. Salina (author), Dalman, R.A.F. (author), Karamitopoulos, P. (author), Busschers, F. (author), Sacchi, Q. (author), Verga, F. (author)
Stratigraphic forward modelling (SFM) provides the means to produce geologically coherent and realistic models. In this paper, we demonstrate the possibility of matching lithological variability simulated with a basin-scale advection-diffusion SFM to a data-rich real-world setting, i.e. the Holocene Rhine-Meuse fluvio-deltaic system in the...
article 2020
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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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Zhang, Y. (author), Gautam, R. (author), Pandey, S. (author), Omara, M. (author), Maasakkers, J.D. (author), Sadavarte, P. (author), Lyon, D. (author), Nesser, H. (author), Sulprizio, M.P. (author), Varon, D.J. (author), Zhang, R. (author), Houweling, S. (author), Zavala-Araiza, D. (author), Alvarez, R.A. (author), Lorente, A. (author), Hamburg, S.P. (author), Aben, I. (author), Jacob, D.J. (author)
Using new satellite observations and atmospheric inverse modeling, we report methane emissions from the Permian Basin, which is among the world's most prolific oil-producing regions and accounts for >30% of total U.S. oil production. Based on satellite measurements from May 2018 to March 2019, Permian methane emissions from oil and natural gas...
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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Jin, J. (author), Segers, A.J. (author), Heemink, A. (author), Yoshida, M. (author), Han, W. (author), Lin, H.X. (author)
Aerosol optical depths (AODs) from the new Himawari-8 satellite instrument have been assimilated in a dust simulation model over East Asia. This advanced geostationary instrument is capable of monitoring the East Asian dust storms which usually have great spatial and temporal variability. The quality of the data has been verified through a...
article 2019
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Fokker, P.A. (author), van Leijen, F.J. (author), Orlic, B. (author), van der Marel, H. (author), Hanssen, R.F. (author)
Ground surface dynamics is one of the processes influencing the future of the Wadden Sea area. Vertical land movement, both subsidence and heave, is a direct contributor to changes in the relative sea level. It is defined as the change of height of the Earth’s surface with respect to a vertical datum. In the Netherlands, the Normaal Amsterdams...
article 2018
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Nieuwenhuizen, R.P.J. (author), Kruithof, M. (author), Schutte, K. (author)
High resolution imagery is of crucial importance for the performance on visual recognition tasks. Super-resolution (SR) reconstruction algorithms aim to enhance the image resolution beyond the capability of the image sensor being used. Traditional SR algorithms approach this inverse problem using physical models for the image formation combined...
conference paper 2017
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Lu, S. (author), Heemink, A. (author), Lin, H.X. (author), Segers, A. (author), Fu, G. (author)
Remote sensing, as a powerful tool for monitoring atmospheric phenomena, has been playing an increasingly important role in inverse modeling. Remote sensing instruments measure quantities that often combine several state variables as one. This creates very strong correlations between the state variables that share the same observation variable....
article 2017
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Oom, M. (author), Feru, E. (author), de Jager, B. (author), de Lange, R. (author), Ouwerkerk, H. (author)
conference paper 2017
Searched for: subject%3A%22Inversion%22
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