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Reimann, Jesse (author)It was first shown by D. Potapov and F. Sukochev in 2009 that Lipschitz functions are also operator-Lipschitz on Schatten class operators S<sup>p</sup>, 1<p<∞, which is related to a conjecture by M. Krein. Their proof combined Schur multiplication, a generalisation of component-wise matrix multiplication, with the so-called first order...master thesis 2024
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Ouerghi, Ibrahim (author)The mimetic spectral element method is a relatively young method in numerical solutions of partial differential equations and actions that describe physical systems. Its advantage is that it takes the geometrical structure of the problem into account which guarantees consistency of the numerical scheme and the conservation of relevant quantities...master thesis 2023
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Oudejans, Benjamin (author)In this thesis, we derive a lower bound on a quantity appearing in a Fourier multiplier inequality on solvable Lie groups.<br/>In Caspers, Janssens, Krishnaswamy-Usha and Miaskiwskyi (2022), a classical result by de Leeuw about the restriction of Fourier multipliers on $\mathbb{R}^n$ to a discrete subgroup is extended to a noncommutative setting...master thesis 2023
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Subramani, Surya Natarajan (author)Radiation pattern measurements is a critical step in characterizing antennas before they are used in any system for a specific application. To identify any defects or to acquire the true radiation characteristics of the antenna under test, densely sampled measurements are desired. However, this results in a time and cost expensive measurement...master thesis 2023
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Duzijn, Yannick (author)<br/>With increasing healthcare demand, environmental concerns and waste management in healthcare, particularly in the operating room (OR), are significant issues. Disposable surgical energy devices, like vessel sealers, gain popularity in veterinary healthcare, but reusing them is officially forbidden by law and presents challenges. Objective:...master thesis 2023
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Fu, Zhuohui (author)Class D audio amplifier is widely used in many electronic applications such as automobiles, laptops, and mobile phones. However, electromagnetic interference (EMI) generated by Class-D audio amplifiers frequently requires an external LC filter for suppression. The LC filter itself causes significant nonlinearity. Hence, feedback after LC is...master thesis 2022
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Huang, Zian (author)In recent years, the Wireless Power Transfer (WPT) system has become more and more popular due to its prominent advantages, especially for Electrical Vehicle (EV) charging. The WPT systems are required to follow the EV battery charging profiles, thus more and more voltage control methods with distinctive characteristics are proposed and studied....master thesis 2022
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Popa, Vlad (author)In an attempt to find alternatives for solving partial differential equations (PDEs)<br/>with traditional numerical methods, a new field has emerged which incorporates<br/>the residual of a PDE into the loss function of an Artificial Neural Network. This<br/>method is called Physics-Informed Neural Network (PINN). In this thesis, we study dense...bachelor thesis 2022
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Tariq Alaa Mohamed Aziz Ibrahim, Tariq (author)Wireless data traffic is projected to steadily increase in the near future, necessitating the demand for transceivers with higher linearity and efficiency. Digital power amplifiers have the potential to achieve these higher efficiency demands while digital pre-distortion can be used to improve their linearity. Digital pre-distortion requires a...master thesis 2022
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Klop, Casper (author)Offshore wind energy is expected to play a major role in the upcoming energy transition. For long distances to shore, it is preferable to connect the wind farms to land by means of High-Voltage DC (HVDC) cables to reduce losses and costs. This currently poses challenges, as wind turbine generators produce variable-frequency low-voltage AC power,...master thesis 2022
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Lan, Dun (author)With the rapid development of electrical vehicles (EV) and the trends in transportation electrification, the demand for fast charging facilities for electric vehicles is rising. <br/> <br/>In this thesis, a two-stage power electronics converter for DC fast battery charging application is designed and studied. A buck type 12-pulse converter with...master thesis 2022
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LIANG, YAWEN (author)Nowadays, electric vehicles (EVs) in the market only travel short distance and are usually charged at home which can be the obstacle in the way of EVs development. As a result, fast charging that can ensure long-distance drive with shorter charging time draws more and more attention.<br/><br/>In emerging fast-charging stations, DC fast chargers ...master thesis 2022
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De Miguel Muñoz, Pablo (author)The rupture of atherosclerotic plaques present in vital arteries is the main trigger of fatal cardiovascular events, such as heart attacks and strokes. Plaque rupture is a mechanical failure of the fibrous plaque tissue that ensues upon large deformations of the tissue, induced by the blood pressure. Current knowledge on the rupture...master thesis 2022
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Deshpande, Atharva (author)In recent years, the demand for wireless communication devices is rapidly increasing and it is estimated to keep growing exponentially over the coming decade. This demand is accompanied by a demand for high-speed and reliable communication. One of the challenges faced by the RF design engineers is to fulfill these demands while utilizing the...master thesis 2022
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Tome Robles, Dany (author)An investigation into AC superconducting coils is performed with a permanent magnet generator for a wind power turbine of 15 MW. Two reference models are sized: on the one hand, a DTU and NREL 15 MW wind turbine model is taken as a reference to set the mechanical speed according to the output power and the mechanical constraints of the blades;...master thesis 2021
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Fleuren, Jules (author)Vector spherical harmonics are a set of basis functions for vector fields derived from the spherical harmonic functions. They are commonly used in spectral methods in certain areas of applied mathematics. In most of the existing literature they are defined in a way that is heavily dependent on the used coördinate system. In this thesis we define...bachelor thesis 2021
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Xiao, Dayang (author)Miniature ultrasound probes increasingly employ ASIC that drive the transducer elements with HV pulses and process the received echo signals. Due to size constraints, the HV pulsers tend to be relatively simple circuits, in which HV MOS transistors pull the transducer element to a HV supply and back to ground. An important disadvantage of...master thesis 2020
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Vijay Wargiya, Sanuj (author)There has been a rapid development in the growth of Wind power generation in the last decade. This has led to wind power becoming a major contributor to the modern electrical grids. For the grids that are still based on conventional sources of energy, integrating wind power causes a serious impact on their performance. While the Windfarm must...master thesis 2020
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van Winden, Joris (author)In this thesis, networks of coupled quantum harmonic oscillators are studied. The dynamics of these networks are determined by single-frequency vibrations of the entire network called normal modes. We study the behavior of the nor- mal modes when the network is coupled to a thermodynamical heat bath by looking at the Lindblad Master Equation of...bachelor thesis 2020
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van der Esch, I.A. (author)Soil exhibits hysteretic damping. A commonly used implementation of this type of damping are the Masing rules. They consist of a loading and an unloading branch, dened as a piecewise function and having a nonsmooth character. This paper presents a framework how steady-state solutions of the motion of a soil column, with nonlinear hysteretic...master thesis 2020