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Ranjbar, Roza (author), Segovia Castillo, P. (author), Duviella, Eric (author), Etienne, Lucien (author), Maestre, José M. (author), Camacho, Eduardo F. (author)This paper presents the design of a model predictive control (MPC) for the Calais canal, located in the north of France for satisfactory management of the system. To estimate the unknown inputs/outputs arising from the uncontrolled pumps, a digital twin (DT) in the framework of a Matlab-SIC2 is used to reproduce the dynamics of the canal, and...journal article 2024
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Vroom, Anika (author)This thesis explores the application of Distributed Temperature Sensing (DTS) technology to observe temperature gradients and turbulent eddies within and above a forest vegetation layer. Atmospheric temperature gradients tie directly to heat transfer, a primary mode of which are turbulent eddies. The goal in studying these elements is to enhance...master thesis 2023
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Ponsioen, L.A. (author)A Digital twin, a digital replica of a physical entity or system, encapsulated in a software model, represents a promising technology that has demonstrated its effectiveness for asset management in various industries. Rijkswaterstaat has gained interest in investigating the possibilities for digital twin integration in the asset management of...report 2023
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Yang, Y. (author), Huang, Mo (author), Du, S. (author), Martins, Rui P. (author), Lu, Yan (author)High-frequency buck converters need a fast transition of switching nodes (high dv/dt). Such high dv/dt, especially the positive one, can cause malfunction of a conventional pulse-triggered active-coupled (PTAC) level shifter that is used to control the high-side NMOS switch. In this work, we first discuss the dv/dt immunity of conventional PTAC...journal article 2023
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Schilperoort, Remy (author), Post, Johan (author), Klootwijk, Martijn (author), Hoefeijzers, Bas (author), Hof, Arjo (author), Palsma, Bert (author), Leenen, Imke (author), Makris, Konstantinos F. (author), Langeveld, J.G. (author)Illicit connections of wastewater to stormwater systems are the main drawback of separate sewer systems, as they lead to a direct discharge of untreated wastewater to the aquatic environment. Consequently, several inspection methods have been developed for detecting illicit connections. This study simultaneously applied several low- and high...journal article 2023
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Sharma, Bhawana (author), Sharma, Lokesh (author), Lal, C. (author)IoT has gained immense popularity recently with advancements in technologies and big data. IoT network is dynamically increasing with the addition of devices, and the big data is generated within the network, making the network vulnerable to attacks. Thus, network security is essential, and an intrusion detection system is needed. In this...conference paper 2023
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des Tombe, B.F. (author)The pressure on groundwater systems, especially in coastal regions, increases as the population rapidly grows. In these regions, management of water tables and fluxes is important to minimize droughts, salt-water intrusion, and flooding. Proper management of such groundwater systems requires knowledge of how groundwater responds to water...doctoral thesis 2021
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Draganov, D.S. (author), Ma, X. (author), Buisman, M. (author), Kiers, Tjeerd (author), Heller, H.K.J. (author), Kirichek, Alex (author)In ports and waterways, the bathymetry is regularly surveyed for updating navigation charts ensuring safe transport. In port areas with fluid-mud layers, most traditional surveying techniques are accurate but are intrusive and provide one-dimensional measurements limiting their application. Current non-intrusive surveying techniques are less...book chapter 2021
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Eland, E.N. (author), Karmakar, S. (author), Gonen, B. (author), van Veldhoven, Robert (author), Makinwa, K.A.A. (author)This article describes a discrete-time zoom analog-to-digital converter (ADC) intended for audio applications. It uses a coarse 5-bit SAR ADC in tandem with a fine third-order delta-sigma modulator (ΔΣM) to efficiently obtain a high dynamic range. To minimize its over-sampling ratio (OSR) and, thus, its digital power consumption, the...journal article 2021
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Tijs, Kasper (author)The objective of this research is to explore the possibilities in the use of digital twins towards the maintenance and operation of tunnels. This is explored by looking at the end users of the technology, to profile their needs and requirements and consider a digital twin design that focuses on this. This research is the start of a human centred...master thesis 2020
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van der Scheer, Bor (author)A suggested approach for determining groundwater flow in unconsolidated aquifers is tested. Performing a heat pulse response test by using a heat- and fibre-optic cable should result in a vertical profile of groundwater velocities. These cables are installed by using direct push ensuring the direct contact between cable and aquifer. The...student report 2020
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Wang, D. (author), Rueda, José L. (author), Rakhshani, E. (author), van der Meijden, M.A.M.M. (author)Unlike synchronous generators, wind turbines cannot directly respond to large disturbances, which may cause transient instability, due to their power electronic-based interface and maximum power control strategy. To effectively monitor the influence of wind turbines, this paper proposes an approach that combines decision trees (DTs), and a...journal article 2020
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Qin, Z. (author), Shen, Zhan (author), Blaabjerg, Frede (author), Bauer, P. (author)In dual active bridge (DAB) converters, there can be transformer current ringing, especially when the transformer turns ratio is high. It is induced by high dv/dt generated by fast switching as well as the low impedance of the magnetic tank at the high-frequency range. To quantify the influence of the magnetic tank, its impedance model is...journal article 2020
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des Tombe, B.F. (author), Schilperoort, B. (author), Bakker, M. (author)Distributed temperature sensing (DTS) systems can be used to estimate the temperature along optic fibers of several kilometers at a sub-meter interval. DTS systems function by shooting laser pulses through a fiber and measuring its backscatter intensity at two distinct wavelengths in the Raman spectrum. The scattering-loss coefficients for...journal article 2020
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Agliata, R. (author), Bogaard, T.A. (author), Greco, Roberto (author), Minardo, Aldo (author), Mollo, Luigi (author), Steele-Dunne, S.C. (author)Undesired presence of water in historical masonries has a negative effect on the walls and causes deterioration of decorative works covering the walls, such as frescoes and valuable plasters. To prevent this, non-invasive moisture measurements are needed that avoid damage during masonry inspection caused by sample taking or probe insertion....journal article 2019
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van Ramshorst, Justus (author)Near-surface wind speed is typically only measured by point observations. The so-called Actively Heated Fiber-Optic (AHFO) technique, however, has the potential to provide high-resolution distributed observations, allowing for better understanding of different processes. However, before it can be widely used, its performance needs to be tested...master thesis 2018
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Solcerova, A. (author), van Emmerik, T.H.M. (author), Hilgersom, K.P. (author), van de Ven, F.H.M. (author), van de Giesen, N.C. (author)The urban heat island effect was first described 200 years ago, but the development of ways to mitigate heat in urban areas reaches much further into the past. Uchimizu is a 17th century Japanese tradition, in which water is sprinkled around houses to cool the ground surface and air by evaporation. Unfortunately, the number of published studies...journal article 2018
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Liu, S. (author), Geng, Yingsan (author), Popov, M. (author), Wang, Jianhua (author), Liu, Zhiyuan (author), Zhang, Bojian (author)The vacuum interrupter is used as the key component of an active DCCB due to its excellent interruption and dielectric recovery characteristics after current zero. The vacuum interrupter can only interrupt the fault currents below the limitation of a critical di/dt and TIV, otherwise it causes a reignition and the interruption failure. In...conference paper 2018
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Dong, J. (author), Agliata, Rosa (author), Steele-Dunne, S.C. (author), Hoes, O.A.C. (author), Bogaard, T.A. (author), Greco, Roberto (author), van de Giesen, N.C. (author)Several recent studies have highlighted the potential of Actively Heated Fiber Optics (AHFO) for high resolution soil moisture mapping. In AHFO, the soil moisture can be calculated from the cumulative temperature (T<sub>cum</sub>), the maximum temperature (T<sub>max</sub>), or the soil thermal conductivity determined from the cooling phase...journal article 2017
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Spruit, R. (author), van Tol, A.F. (author), Broere, W. (author), Doornenbal, Pieter (author), Hopman, Victor (author)Distributed temperature sensing (DTS) can be used to monitor the production process of diaphragm walls. DTS is able to differentiate between already present or fresh bentonite suspensions during refreshing of the bentonite slurry in the trench. During concrete casting, DTS is able to differentiate between the bentonite suspension and concrete...journal article 2017
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