Searched for: subject:"reduction"
(1 - 20 of 322)

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Jiang, Peng (author), Fu, Xiuju (author), Fan, Yee Van (author), Klemeš, Jiří Jaromír (author), Chen, P. (author), Ma, Stefan (author), Zhang, Wanbing (author)
Coronavirus disease-2019 (COVID-19) poses a significant threat to the population and urban sustainability worldwide. The surge mitigation is complicated and associates many factors, including the pandemic status, policy, socioeconomics and resident behaviours. Modelling and analytics with spatial-temporal big urban data are required to assist...
journal article 2021
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Greidanus, A.J. (author)
This thesis describes the investigation of the dynamics of turbulent shear flows over non-smooth surfaces. The research was conducted in two parts, related to the experimental facility used in combination with the applied functional surface. The first part describes the experiments of a turbulent Taylor-Couette flow over a...
doctoral thesis 2020
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Habben Jansen, A.C. (author)
Naval ships are designed to operate in hostile environments. As such, vulnerability reduction is an important aspect that needs to be assessed during the design. With the increased interest in electrification and automation on board naval ships, the vulnerability of distributed systems has become a major topic of interest. However, assessing...
doctoral thesis 2020
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Kooij, C. (author), Hekkenberg, R.G. (author)
Recently, autonomous ships have gotten a lot more attention both in the media and in research. However, very little research has focussed on the effects of automation on the size of the crew. This paper analyses the effects of added automation on the required size and composition of the crew on a 750 TEU short sea container vessel. A Crew...
journal article 2020
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Zhou, Jianchao (author)
Stability of dikes is a national security issue for densely populated low-lying countries situated in delta areas, like the Netherlands. One of the dominant dike failuremechanisms in the Netherlands is piping, where high seepage flow rates transport sand particles and subsequently form a ’pipe’ under a dike structure. As such, one manner to...
doctoral thesis 2020
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Firet, N.J. (author)
Fossil resources are being depleted, while the concentration of CO2 in the atmosphere rises. There clearly is a strong and immediate need for a radical energy transition. Renewable energy is growing strongly as supplier of fossil-free electricity, but it needs large-scale and long-term storage options in order to be able to make a real impact on...
doctoral thesis 2020
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Zhu, Zichong (author), Huang, Yunkai (author), Dong, J. (author), Peng, Fei (author), Yao, Yu (author)
This article presents a new rotor design to reduce rotor eddy current loss of a high-speed permanent magnet synchronous machine for flywheel energy storage system. Instead of using common nonmagnetic sleeves, the new rotor incorporates permeable retaining sleeves (PRSs) to fix permanent magnets on the rotor hub. The PRSs are made of permalloy...
journal article 2020
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Wamsler, Christine (author), Johannessen, A. (author)
Increasing impacts from disasters and climate hazards have prompted international efforts to promote the development of national disaster risk reduction and resilience (DRRR) strategies intended to reduce mortality and other losses. The development of such strategies is the subject of target E of the Sendai Framework for Disaster Risk...
journal article 2020
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Urso, A. (author), Chen, Y. (author), Dijkhuis, Johan F. (author), Liu, Yao-Hong (author), Babaie, M. (author), Serdijn, W.A. (author)
This article presents guidelines for designing the power supply blocks of RF oscillators. To preserve their spectral purity, the requirements on the noise and ripple of the supply voltage are firstly evaluated based on the oscillator supply pushing factor and the oscillator Figure-of-Merit (FOM). Those specifications are then employed to design...
journal article 2020
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Tyuryukanov, I. (author)
The vast size of a modern interconnected power grid precludes controlling and operating it as a single object. Subdividing a power grid into a number of internally coherent areas allows to cope with its inherent complexity and to enable more efficient control structures. This thesis focuses on discovering the power system structure to facilitate...
doctoral thesis 2020
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Gavel, D.J. (author)
The principal objective of this work is to understand the physicochemical behaviour of the ferrous raw material (pellet and/or sinter) bed mixed with nut coke under the blast furnace conditions. To investigate this behaviour, a specially designed blast furnace simulator called the Reduction Softening and Melting (RSM) apparatus is utilised ...
doctoral thesis 2020
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Tabak, U. (author)
In this thesis, we present numerical techniques for analyzing vibro-acoustic problems that emerge from the coupling of elastic structures with fluid domains. The main analysis tool used for numerical modelling is the Finite Element Technique (FEM). By using FEM, the goal of our research was to either improve the already available techniques or...
doctoral thesis 2020
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Zhang, J. (author)
In speech processing applications, e.g., speech recognition, hearing aids (HAs), video conferencing, and human-computer interaction, speech enhancement or noise reduction is an essential front-end task, as the recorded speech signals are inevitably corrupted by interference, including coherent/incoherent noise and reverberation. Traditional...
doctoral thesis 2020
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van Oversteeg, Christina H.M. (author), Tapia Rosales, Marisol (author), Helfferich, Kristiaan H. (author), Ghiasi, Mahnaz (author), Meeldijk, Johannes D. (author), Firet, N.J. (author), Ngene, Peter (author), de Mello Donegá, Celso (author), de Jongh, Petra E. (author)
The electrocatalytic reduction of CO<sub>2</sub> to produce sustainable fuels and chemicals is attracting great attention. Cu-based catalysts can lead to the production of a range of different molecules, and interestingly the product selectivity strongly depends on the preparation history, although it is not fully understood yet why. We...
journal article 2020
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De Gregorio, Gian Luca (author), Burdyny, T.E. (author), Loiudice, Anna (author), Iyengar, Pranit (author), Smith, W.A. (author), Buonsanti, Raffaella (author)
Despite substantial progress in the electrochemical conversion of CO<sub>2</sub> into value-added chemicals, the translation of fundamental studies into commercially relevant conditions requires additional efforts. Here, we study the catalytic properties of tailored Cu nanocatalysts under commercially relevant current densities in a gas-fed...
journal article 2020
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Dan, Sebastian (author), Altomare, Corrado (author), Suzuki, T. (author), Spiesschaert, Tim (author), Verwaest, Toon (author)
Physical model experiments were conducted in a wave tank at Flanders Hydraulics Research, Antwerp, Belgium, to characterize the wave overtopping and impact force on vertical quay walls and sloping sea dike (1:2.5) under very oblique wave attack (angle between 45° and 80°). This study was triggered by the scarce scientific literature on the...
journal article 2020
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Sinha, Kautuk (author), Singh, Niels K. (author), Abdalla, Mostafa M. (author), De Breuker, R. (author), Alijani, F. (author)
The article proposes a method developed for model order reduction in a Finite Element (FE) framework that is capable of computing higher order stiffness tensors. In the method, a truncated third order asymptotic expansion is used for transformation of an FE model to a reduced system. The basis matrix in the formulation of the reduced-order...
journal article 2020
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Onencan, A.M. (author), Liu, Lian Ena (author), van de Walle, B.A. (author)
The global impacts of disaster risks are on the rise. Moreover, evidence shows that the severity of damage will increase exponentially. In 2019, there were 395 natural disasters that caused 11,755 deaths. Literature and practice indicate that diversification of disaster risk management (DRM) approaches can make communities more resilient. One...
journal article 2020
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Tyuryukanov, I. (author), Popov, M. (author), van der Meijden, M.A.M.M. (author), Terzija, Vladimir (author)
Identifying generator coherency with respect to slow oscillatory modes has numerous power system use cases including dynamic model reduction, dynamic security analysis, or system integrity protection schemes (e.g., power system islanding). Despite their popularity in both research and industry, classic eigenvector-based slow coherency techniques...
journal article 2020
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Petitfrere, Martin (author), Nichita, Dan Vladimir (author), Voskov, D.V. (author), Zaydullin, Rustem (author), Bogdanov, Igor (author)
Several compositional reservoir simulators based on equations of state (EoS) have been designed. Yet, few of them can deal with thermal processes such as steam injection and no fully compositional thermal simulation of the steam injection process has been proposed with extra-heavy oils yet. Those simulations appear essential and will offer...
journal article 2020
Searched for: subject:"reduction"
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