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Liu, L. (author)
The MMC-based MTDC systems are considered a promising solution for long-distance power transmission, integration of renewable energy sources, and interconnection of power grids. Nowadays, MMC-based MTDC systems have been successfully developed in various projects worldwide and are expected to play a significant role in future electrical power...
doctoral thesis 2024
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Liu, Hanqing (author)
This thesis provides a comprehensive research of both the mechanics and thermodynamics of suspended two-dimensional (2D) membranes, such as tunable mechanical resonance, membrane deformation, heat transport, phonon scattering, and energy dissipation. These characteristics make nanomechanical resonators, made of a suspended 2D membrane, promising...
doctoral thesis 2023
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Liu, Z. (author)
Garments, one of the human basic needs, were customized and handmade before the Industrial Revolution. After the realization of mass production, the cost of a piece of clothing became lower, but some disadvantages arose. Garments were no longer made to measure and overproduction caused environmental problems. The new developments in digital...
doctoral thesis 2023
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Liu, X. (author)
doctoral thesis 2023
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Liu, C. (author)
The MTH process is recognized as one of the key ingredients of the methanol (MeOH) economy concept enabling the production of crucial hydrocarbon building blocks, such as light olefins and aromatics, starting from CO2 as the primary carbon source. Besides the driving force of reducing reliance on fossil fuels, the highly tunable nature of this...
doctoral thesis 2022
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Liu, K. (author)
The urgent threat of global warming and the demand for sustainable fuels have made the electroreduction of CO2 a priority, due to its possibility in closed-loop cycle of carbon. The energy conversion and strategy can diminish the content of CO2 in the atmosphere, convert renewable electricity into chemical energy and store it in chemical bonds,...
doctoral thesis 2022
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Liu, J. (author)
At different places in the world, the local climate conditions have helped the preservation of archaeological sites to a very high degree. This has helped us understand better our history. This situation, however, is quickly changing due to the climate change we are now facing. The condition at an increasing number of ancient sites around the...
doctoral thesis 2022
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Liu, H. (author)
In the Geomatics domain, a point cloud refers to a data set which records the coordinates and other attributes of a huge number of points. Conceptually, each of these attributes can be regarded as a dimension, representing a specific type of information. Apart from routinely concerned spatio-temporal dimensions for coordinates, other dimensions...
doctoral thesis 2022
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Liu, Z. (author)
doctoral thesis 2022
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Liu, M. (author)
Growth in the number of vehicles causes excessive traffic congestion and travel delay on urban roads, especially at signalized intersections. The recent advances in connected and automated vehicle (CAV) technology and the upgrade of Vehicle-to-Vehicle (V2V), Vehicle-to-Infrastructure (V2I), and Infrastructure-to-Vehicle (I2V) communications have...
doctoral thesis 2022
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Liu, H. (author)
The focus of this thesis is on the utilization of biodegradable drug nanocarriers combined with ionizing radiation in cancer treatment. Polymeric micelles based on PCL-PEO block copolymers were selected as the main platform for delivering various therapeutic substances due to their size, degradability and easy preparation. This thesis can...
doctoral thesis 2021
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Liu, Y. (author)
The gravity assist (GA) plays an important role in space missions since itwas first applied by the Luna 3 vehicle in 1959. For preliminary trajectory design, the so-called patchedconics model provides a simple model for a gravity assist. This approach, based on twobody formulations, splits amulti-body probleminto a succession of two-body...
doctoral thesis 2021
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Liu, J. (author)
The ability to model irregular data and the interactions between them have<br/>extended the traditional signal processing tools to the graph domain. Under<br/>these circumstances, the emergence of graph signal processing has offered a<br/>brand new framework for dealing with complex data. In particular, the graph<br/>Fourier transform (GFT) lets...
doctoral thesis 2021
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Liu, Y. (author)
Over the last decades of development of knowledge management and organizational learning, there has been an increase in learning research within and across projects. Learning from past lessons in projects and preparing for the next project management practices is very important in large infrastructure projects. The autonomy of projects brings...
doctoral thesis 2021
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Liu, S. (author)
Mathematical modeling and numerical methods play a key role in the field of quantitative finance, for example, for financial derivative pricing and for risk management purposes. Asset models of increasing complexity, like stochastic volatility models (local stochastic volatility, rough volatility based on fractional Brownian motion) require...
doctoral thesis 2021
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Liu, Y. (author)
Fiber reinforced polymer composites are increasingly used in impactresistant devices, automotives, and aircraft structures due to their high strengthtoweight ratios and their potential for impact energy absorption. Dynamic impact loading causes complex deformation and failure phenomena in composite laminates. Moreover, the high loading rates in...
doctoral thesis 2020
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Liu, M. (author)
Landscape design focuses on the construction and articulation of outdoor space and results in landscape architectonic compositions. In order to communicate about three-dimensional forms and functions, vocabulary, representations, and tools (in terms of spatial-visual characteristics) are of fundamental importance for landscape architects to...
doctoral thesis 2020
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Liu, X. (author)
Railway crossings are essential components of the railway track system that allow trains to switch from one track to another. Due to the complex wheel-rail interaction in the crossing panel, crossings are vulnerable elements of railway infrastructure and usually have short service lives. The crossing damage not only results in substantial...
doctoral thesis 2020
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Liu, H. (author)
The wind energy industry has gained a key role in the global fight against greenhouse gas emissions. Although fossil fuels have still the largest share in the global energy mix, the production of wind energy, especially offshore, has rapidly grown since the 1990s. According to the International Energy Association, Europe targets offshore wind to...
doctoral thesis 2020
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Liu, Y. (author)
The progress of modern biotechnology has enabled the development of fermentation processes for the production of fuels and chemicals from renewable feedstocks. The current fermentation processes for bio-based production commonly start with a growth phase of the microorganisms followed by a production phase. This implies that biomass formation...
doctoral thesis 2020
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