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Feng, H. (author), Gao, Zhiwei (author), van Ostayen, R.A.J. (author), Zhang, Xiaofeng (author)
This paper aims to investigate the combined effects of working condition and structural parameters of groove texture on the dynamic characteristics, stability and unbalance response of a water-lubricated hydrodynamic bearing–rotor system to avoid instability and excessive vibration of the rotor. The Navier–Stokes equation, standard K-ε model...
journal article 2023
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Hebbar, Akshatha (author), Dey, P. (author), Vatti, Anoop Kishore (author)
The ability of neat deep eutectic solvents (DESs) to influence protein structure and function has gained considerable interest due to the unstable nature of enzymes or therapeutic proteins, which are often exposed to thermal, chemical, or mechanical stresses when handled at an industrial scale. In this study, we simulated a model globular...
journal article 2023
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Papapantoleon, A. (author), Possamaï, Dylan (author), Saplaouras, Alexandros (author)
In this paper, we obtain stability results for backward stochastic differential equations with jumps (BSDEs) in a very general framework. More specifically, we consider a convergent sequence of standard data, each associated to their own filtration, and we prove that the associated sequence of (unique) solutions is also convergent. The...
journal article 2023
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Henzel, J. (author), Bakker, N.J. (author), Najafi, Mehrdad (author), Zardetto, Valerio (author), Veenstra, Sjoerd (author), Isabella, O. (author), Mazzarella, L. (author), Weeber, A.W. (author), Theelen, Mirjam (author)
Nonequal current generation in the cells of a photovoltaic module, e.g., due to partial shading, leads to operation in reverse bias. This quickly causes a significant efficiency loss in perovskite solar cells. We report a more quantitative investigation of the reverse bias degradation. Various small reverse biases (negative voltages) were...
journal article 2023
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Reed, Emily A. (author), Bogdan, Paul (author), Gonçalves Melo Pequito, S.D. (author)
Assessing the stability of biological system models has aided in uncovering a plethora of new insights in genetics, neuroscience, and medicine. In this paper, we focus on analyzing the stability of neurological signals, including electroencephalogram (EEG) signals. Interestingly, spatiotemporal discrete-time linear fractional-order systems ...
journal article 2022
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Gonzalez-Longatt, Francisco M. (author), Rueda, José L. (author), Palensky, P. (author), Chamorro, Harold R. (author)
Power electronic converter (PEC) is a key element for the successful integration of novel technologies, PEC working as inverter at novel generation technologies are the decisive components to zero-net carbon emissions in the electricity systems. The colossal penetration of IBG tends to produce several issues in the power networks. There is a...
conference paper 2022
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Jansen, J.D. (author), Meulenbroek, B.J. (author)
We address aseismic fault slip and the onset of seismicity resulting from depletion-induced or injection-induced stresses in reservoirs with pre-existing vertical or inclined faults. Building on classic results, we discuss semi-analytical modelling techniques for fault slip including dislocation theory, Cauchy-type singular integral equations...
journal article 2022
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Eichinger, Katharina (author), Gnann, M.V. (author), Kuehn, Christian (author)
We investigate the stability of traveling-pulse solutions to the stochastic FitzHugh–Nagumo equations with additive noise. Special attention is given to the effect of small noise on the classical deterministically stable fast traveling pulse. Our method is based on adapting the velocity of the traveling wave by solving a scalar stochastic...
journal article 2022
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Guan, Hui (author), Lei, Yutian (author), Wu, Qiyuan (author), Zhou, Xufeng (author), Wang, H. (author), Wang, Gang (author), Li, Wenquan (author), Jin, Zhiwen (author), Lan, Wei (author)
Interface engineering is a simple and effective strategy for improving the photovoltaic performance and stability of perovskite solar cells (PSCs). Herein, an interface co-modification strategy is proposed, using [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) and 2-fluoro-1,4-phenylenediammonium iodide (2FPPD) to modify the electron...
journal article 2022
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Lei, Jintao (author), Qin, Z. (author), Li, Wuhua (author), Bauer, P. (author), He, Xiangning (author)
A shunt active power filter (SAPF) is coupled with load admittance in weak grid conditions, which poses a challenge to stability analysis. In this article, the admittance model of the SAPF is developed, which reveals the coupling mechanism between SAPF and load concisely and accurately. On top of that, the stability region of the system is...
journal article 2021
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Martin-Diaz, Javier (author), Molina-Espeja, Patricia (author), Hofrichter, Martin (author), Hollmann, F. (author), Alcalde, Miguel (author)
Fungal unspecific peroxygenases (UPOs) are efficient biocatalysts that insert oxygen atoms into nonactivated C–H bonds with high selectivity. Many oxyfunctionalization reactions catalyzed by UPOs are favored in organic solvents, a milieu in which their enzymatic activity is drastically reduced. Using as departure point the UPO secretion...
journal article 2021
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Gupta, A. (author), van den Boom, A.J.J. (author), van der Woude, J.W. (author), De Schutter, B.H.K. (author)
We propose a framework for studying the stability of discrete-event systems modelled as switching max-plus linear systems. In this framework, we propose a set of notions of stability for generic discrete-event systems in the max-plus algebra. Then we show the loss of equivalence of these notions for switching max-plus linear systems due to the...
journal article 2020
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Zhang, Jie (author), Gao, Ling (author), Hu, Jie (author), Wang, Chongjun (author), Hagedoorn, P.L. (author), Li, Ning (author), Zhou, Xing (author)
Hypericin is a naturally occurring compound synthesized by certain species of the genus Hypericum, with various pharmacological effects. It is used as a natural photosensitizing agent with great potential in photodynamic therapy. This review discusses the latest results about the biosynthetic pathways and chemical synthetic routes to obtain...
journal article 2020
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Lu, T. (author)
Rotating ring-like structures are very commonly used in civil, mechanical and aerospace engineering. Typical examples of such structures are components in turbomachinery, compliant gears, rolling tyres and flexible train wheels. At the micro-scale, rotating ring models find their applications in the field of ring gyroscopes, in which high...
doctoral thesis 2019
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Adibi, M. (author), van der Woude, J.W. (author)
In this paper, we present a reinforcement learning control scheme for optimal frequency synchronization in a lossy inverter-based microgrid. Compared to the existing methods in the literature, we relax the restrictions on the system, i.e. being a lossless microgrid, and the transmission lines and loads to have constant impedances. The...
journal article 2019
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Pargar, F. (author)
Determination of the chloride content in a reinforced concrete structure is important for evaluation of the risk of chloride-induced corrosion of reinforcement. The traditional techniques for chloride determination in concrete are laborious, time-consuming and cannot be used for continuous monitoring of the chloride content. The investigation on...
doctoral thesis 2018
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Mountakis, Kiriakos Simon (author)
The research presented in this thesis is part of the Rolling Stock Life Cycle Logistics applied research and development program, conducted by NedTrain. As a company, NedTrain belongs to Nederlandse Spoorwegen (NS; the principal railway company in the Netherlands) and provides maintenance services for the NS train-fleet. The aim of this program...
doctoral thesis 2018
document
Schwab, A.L. (author), Dialynas, G. (author), Happee, R. (author)
The bicycle, being unstable at low speed and marginally stable at high speed, is sensitive to lateral perturbations. One of the major lateral perturbations is crosswind, which can lead to accidents and fatalities. Here we investigate the effect of crosswind on the lateral dynamics and control of the bicycle in a wide range of forward speeds and...
conference paper 2018
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Birdja, Yuvraj Y. (author), Vos, Rafaël E. (author), Wezendonk, T.A. (author), Jiang, Lin (author), Kapteijn, F. (author), Koper, M.T.M. (author)
Heterogenization of molecular catalysts for CO<sub>2</sub> electroreduction has attracted significant research activity, due to the combined advantages of homogeneous and heterogeneous catalysts. In this work, we demonstrate the strong influence of the nature of the substrate on the selectivity and reactivity of electrocatalytic CO<sub>2</sub...
journal article 2018
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Fonod, R. (author), Gill, E.K.A. (author)
The problem of pure magnetic detumbling of a fast-tumbling picosatellite is considered. A new weighted B-dot control algorithm is proposed. The algorithm enables power reduction while not sacrificing detumbling performance. Analytical expressions relating the maximal expected rotational rate to the minimum sampling time required are presented....
conference paper 2018
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