Searched for: subject%3A%22constant%22
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Zhu, Jeffrey (author)
Neutrally stable metamaterials can maintain differ- ent shapes without any energy input, making it a key innovation in the quest for more energy-efficient technologies. Despite this intriguing property, the research in this area is scarce. This study proposes a method for achieving neutral stability in metama- terials. This method is validated...
master thesis 2024
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Borst, M.J. (author)
For a simple graph Γ and for unital C<sup>*</sup>-algebras with GNS-faithful states (A<sub>v</sub>,φ<sub>v</sub>) for v∈VΓ, we consider the reduced graph product (A,φ)=⁎<sub>v,Γ</sub>(A<sub>v</sub>,φ<sub>v</sub>), and show that if every C<sup>*</sup>-algebra A<sub>v</sub> has the completely contractive approximation property (CCAP) and...
journal article 2024
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Alaifari, Rima (author), Bartolucci, F. (author), Steinerberger, Stefan (author), Wellershoff, Matthias (author)
Gabor phase retrieval is the problem of reconstructing a signal from only the magnitudes of its Gabor transform. Previous findings suggest a possible link between unique solvability of the discrete problem (recovery from measurements on a lattice) and stability of the continuous problem (recovery from measurements on an open subset of R<sup>2...
journal article 2024
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Myland, Paul (author), Herzog, Alexander (author), Babilon, Sebastian (author), van Driel, W.D. (author), Khanh, Tran Quoc (author)
This study explores a novel approach to monitor the spectral emission of LEDs by estimating the spectral power distribution from the spectral sensor responses during an accelerated aging experiment. Two methods for reconstructing the actual LED spectra from sensor responses are presented and tested, one solely requires sensor datasheet...
journal article 2024
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Horstman, Bart (author)
This study introduces a new design for the drivetrain of a robotic ball. An application for the robotic ball is a rehabilitation device for young children. With these children, movement can be stimulated in a more intuitive way when a robotic ball is used compared to other training programs. Since the ball will be kicked and played with, an...
master thesis 2023
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Hallema, Rinze (author)
The computation of normalizing constants often brings (higher-dimensional) integrals, which could not be computed analytically or are computationally expensive. Stochastic methods will be explored to find an estimate for normalizing constants. These stochastic methods will be used to estimate the Bayes factor. With this Bayes factor can be...
bachelor thesis 2023
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Meiring, Anton (author)
Background: Scoliosis is a three-dimensional abnormal curvature of the spine, with Adolescent Idiopathic Scoliosis (AIS) being the most common type. Current fusion treatment is highly invasive and removes all mobility of the fused spinal segments. To tackle this problem, non-fusion techniques were developed, that try to correct the abnormal...
master thesis 2023
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Colin, Flip (author)
Flexure mechanisms are widely utilized in precision mechanisms, but their practical use is limited by three major factors, namely restricted range of motion, parasitic motion, and significant reduction in support stiffness when deflected. To address this limitation, in this research the potential of variable thickness flexures in minimizing the...
master thesis 2023
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Yu, Haoyuan (author), Zhang, Hanwen (author), Wang, Yanbo (author), Qin, Z. (author), Chen, Zhe (author), Bauer, P. (author)
This article investigates the stability of triple active bridge (TAB) converter with different types of loads. In this paper, port2 of TAB converter adopts voltage control to supply a constant power load (CPL), and port3 uses voltage control to supply a resistor or uses current control to supply a battery. Then, an extra element theorem-based ...
conference paper 2023
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Ber, Aleksei F. (author), Borst, M.J. (author), Borst, Sander J. (author), Sukochev, F. (author)
We prove that, for a finite-dimensional real normed space V, every bounded mean zero function f ∈ L<sub>∞</sub>([0, 1]; V) can be written in the form f = g ◦ T − g for some g ∈ L<sub>∞</sub>([0, 1]; V) and some ergodic invertible measure preserving transformation T of [0, 1]. Our method moreover allows us to choose g, for any given ε &gt; 0,...
journal article 2023
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Liao, Jianquan (author), Zhou, Niancheng (author), Qin, Z. (author), Wang, Qianggang (author), Bauer, P. (author)
The unbalanced power between positive and negative poles in a bipolar DC distribution network (DC-DN) generates an unbalanced current at the neutral line, which enlarges the power losses of the system and the voltage deviation of DC loads. An unbalanced power suppression strategy based on a series-parallel power flow controller (SP-PFC) is...
journal article 2023
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Skog, Isaac (author), Hendeby, Gustaf (author), Kok, M. (author)
A framework for tightly integrated motion mode classification and state estimation in motion-constrained inertial navigation systems is presented. The framework uses a jump Markov model to describe the navigation system's motion mode and navigation state dynamics with a single model. A bank of Kalman filters is then used for joint inference...
conference paper 2023
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van der Burgh, Bas (author)
Duchenne Muscular Dystrophy (DMD) patients suffer from a severe form of progressive muscular weakness. Consequently, as the disease progresses these patients become more and more dependent on assistive devices for their daily activities. For instance lifting their arms against gravity already becomes challenging. So far, a considerable amount of...
master thesis 2022
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Prins, Peter J. (author)
<b>Research question</b><br/>The topic of this dissertation is the numerical computation of the forward and inverse Non-linear Fourier Transform (NFT) for the Korteweg–de Vries equation (KdV), for sampled signals that decay sufficiently fast on both sides. With NFTs certain non-linear Partial Differential Equations (PDEs) can be solved in a way...
doctoral thesis 2022
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Koenraad, Max (author)
Constant was as an artist, most known for his interdisciplinary work and magnum opus New Babylon. A future potential society without labour, unbound by place and time, inhabited by man at play; the ‘homo ludens’. He worked extensively on the project between 1956 and 1974. During this period he experimented with installations emphasizing on its...
student report 2022
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Wagner, Christian (author), Ferrari, A. (author), Schreuer, Jürgen (author), Couzinié, Jean Philippe (author), Ikeda, Yuji (author), Körmann, F.H.W. (author), Eggeler, Gunther (author), George, Easo P. (author), Laplanche, Guillaume (author)
Physical properties of ten single-phase FCC Cr<sub>x</sub>Mn<sub>20</sub>Fe<sub>20</sub>Co<sub>20</sub>Ni<sub>40-</sub><sub>x</sub> high-entropy alloys (HEAs) were investigated for 0 ≤ x ≤ 26 at%. The lattice parameters of these alloys were nearly independent of composition while solidus temperatures increased linearly by ∼30 K as x increased...
journal article 2022
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Karbasizadeh, Nima (author), Hassan HosseinNia, S. (author)
This paper addresses the main goal of using reset control in precision motion control systems, breaking of the well-known “Waterbed effect”. A new architecture for reset elements will be introduced which has a continuous output signal as opposed to conventional reset elements. A steady-state precision study is presented, showing the steady...
journal article 2022
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Hao, Xiaodi (author), Yu, W. (author), Yuan, Tugui (author), Wu, Yuanyuan (author), van Loosdrecht, Mark C.M. (author)
As a product of phosphorous recovery from anaerobic digestion (AD) of waste activated sludge (WAS), vivianite has received increasing attention. However, key factors controlling vivianite formation have not yet been fully addressed. Thus, this study was initiated to ascertain key factors controlling vivianite formation. A simulation of...
journal article 2022
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Mula, S. (author), Donà, Lorenzo (author), Civalleri, Bartolomeo (author), van der Veen, M.A. (author)
Metal-organic frameworks (MOFs) are a class of nanoporous crystalline materials with very high structural tunability. They possess a very low dielectric permittivity ϵr due to their porosity and hence are favorable for piezoelectric energy harvesting. Even though they have huge potential as piezoelectric materials, a detailed analysis and...
journal article 2022
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Wang, J. (author)
In this paper, constant false alarm rate (CFAR) detector-based approaches are proposed for interference mitigation of Frequency modulated continuous wave (FMCW) radars. The proposed methods exploit the fact that after dechirping and low-pass filtering operations the targets' beat signals of FMCW radars are composed of exponential sinusoidal...
journal article 2022
Searched for: subject%3A%22constant%22
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