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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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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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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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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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van der Blij, N.H. (author), Ramirez Elizondo, L.M. (author), Spaan, M.T.J. (author), Bauer, P. (author)
Changes in distribution grids pose significant challenges with respect to the control and management of these grids. Stability and decentralized control are vital to ensure the availability and accessibility of plug-and-play dc distribution grids that are (temporarily) without communication. Therefore, this paper presents guidelines for these...
journal article 2018
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Li, Bin (author), Jiang, Peng (author), Zhai, Famin (author), Chen, Junhong (author), Bei, G. (author), Hou, Xinmei (author), Chou, Kuo Chih (author)
In this paper, the fabrication and thermal conductivity (TC) of water-based nanofluids using boron (B)-doped SiC as dispersions are reported. Doping B into the <i>β</i>-SiC phase leads to the shrinkage of the SiC lattice due to the substitution of Si atoms (0.134 nm radius) by smaller B atoms (0.095 nm radius). The presence of B in the SiC...
journal article 2018
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Salauddin, M (author), Broere, A. (author), van der Meer, J.W. (author), Verhagen, H.J. (author), Bijl, E (author)
Single layer concrete armor systems are being widely used nowadays in the design of rubble mound breakwaters. Recently, a new concrete armor unit has been developed and applied as single layer armor system in the repair works of one damaged breakwater at Al Fujeirah, UAE. It has a symmetrical shape, in contrast to most other units. Modern...
journal article 2017
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Beyhan, Selami (author), Eghbal Sarabi, F. (author), Lendek, Zsofia (author), Babuska, R. (author)
In this paper, a novel adaptive Takagi-Sugeno (TS) fuzzy observer-based controller is proposed. The closed-loop stability and the boundedness of all the signals are proven by Lyapunov stability analysis. The proposed controller is applied to a flexible-transmission experimental setup. The performance for constant payload in the presence of...
journal article 2017
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Ma, M. (author), Herdeiro Teixeira, A.M. (author), van den Berg, Jan (author), Palensky, P. (author)
Low-voltage distribution grids experience a rising penetration of inverter-based, distributed generation. In order to not only contribute to but also solve voltage problems, these inverters are increasingly asked to participate in intelligent grid controls. Communicating inverters implement distributed voltage droop controls. The impact of...
journal article 2017
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van der Blij, N.H. (author), Ramirez Elizondo, L.M. (author), Spaan, M.T.J. (author), Bauer, P. (author)
Instability caused by low inertia and constant power loads is a major challenge of DC distribution grids. Previous research uses oversimplified models or does not provide general rules for stability. Therefore, a comprehensive approach to analyze the stability of DC distribution systems is desired. This paper presents a method to algebraically...
journal article 2017
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