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Yang, Q. (author)
In traditional reinforcement learning (RL) problems, agents can explore environments to learn optimal policies through trials and errors that are sometimes unsafe. However, unsafe interactions with environments are unacceptable in many safety-critical problems, for instance in robot navigation tasks. Even though RL agents can be trained in...
doctoral thesis 2023
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Yang, D. (author)
There are an increasing number of optimal-design paradigms used in architectural design nowadays. In these paradigms, a design task is formulated, or partially formulated, as an optimization problem. Multi-Disciplinary Optimization and Multi-Objective Optimization, as two important optimal-design paradigms, have shown their great potential in...
doctoral thesis 2022
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Yang, W. (author)
The growing demands for sustainable chemical technologies have prompted a wave of searching new catalysts based on earth-abundant metals. In the field of (de)hydrogenation catalysis, however, the huge performance gap is commonly seen between the 3d-metal-based catalysts and their noble metal counterparts, which largely hampers their practical...
doctoral thesis 2022
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Yang, K. (author)
The concept and necessity of an "energy transition" has become well-known as the general public acknowledges the severe consequences of climate change. As a side effect of industrial revolution, which has brought advances to modern society by burning fossil fuels, pollutants and greenhouse gases are also released to the atmosphere. As a result,...
doctoral thesis 2022
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Yang, W. (author)
Congestion in and pollution by traffic are amongst the most severe and urgent problems faced by both developed and developing countries these days. It is regarded as a "wicked" problem, which implies it is both hard to define the inherent problem and to find adequate measures to deal with. The complexity of transport systems makes it impossible...
doctoral thesis 2021
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Yang, W.W.W. (author)
We start this thesis by exploring the question whether there is more to be done with solid-state nanopores, given the success of nanopores for DNA sequencing applications.
doctoral thesis 2021
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Yang, M. (author)
Multi-epoch Synthetic Aperture Radar Interferometry (InSAR) is widely used to estimate displacements of selected scatterers from phase observations. However, their interpretation needs a connection to objects in the real world. <br/><br/>To associate InSAR scatterers to their corresponding geo-objects, it is necessary to (i) accurately estimate...
doctoral thesis 2020
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Yang, Y. (author)
In recent decades, the availability of a large amount of data has propelled the field of machine learning enormously. Machine learning, however, relies heavily on the availability of annotated data, typically labels indicating to which class a data instance belongs. With the huge amounts of data, this raises the question of how to efficiently...
doctoral thesis 2018
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Yang, Z. (author)
The modelling of wheel-rail dynamic interactions is crucial for accurately predicting wheel/track deterioration and dynamic behaviour. A reliable wheel-rail dynamic interaction model requires a careful treatment of wheel-rail frictional rolling contact and a proper consideration of dynamic effects related to the contact. Since the wheel-rail...
doctoral thesis 2018
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Yang, Z. (author)
This study presents a multi-disciplinary approach for investigating the interactions between groundwater and surface water in the semi-arid Hailiutu catchment in the Erdos Plateau, Northwest China. The study consists of statistical detection of river flow regime shifts at the basin level; multiple in-situ measurements for quantifying groundwater...
doctoral thesis 2018
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Yang, X. (author)
The mining governance in China features a dilemma: on the one hand, there are various issues inherent in China’s mining institutions: 1) an outdated nature of the current legislation, 2) ambiguity in the regulations, and 3) administrative fragmentation of responsible authorities. On the other hand, China has witnessed a fast growing mining...
doctoral thesis 2018
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Yang, J. (author)
Crowd knowledge creation plays a central role in many types of Web based information systems, ranging from community question-answering (CQA) systems (e.g. StackOverflow and Quora) to micro-task crowdsourcing systems (e.g. Amazon mTurk and CrowdFlower). In these systems, knowledge demands are generally fulfilled by means of tasks (e.g. questions...
doctoral thesis 2017
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Yang, Y. (author)
doctoral thesis 2017
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Yang, R. (author)
This thesis presents the theory, design and qualification of a precision capacitive sensor system for displacement measurement that require high resolution, high precision and simultaneously, low power consumption. The challenge to achieve the required performance has been taken care at both mechanical domain (sensor head) and electronic domain ...
doctoral thesis 2015
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Yang, G. (author)
In this thesis we present results of the development of n-i-p thin-film silicon solar cells on randomly textured substrates, aiming for highly efficient micromorph solar cells (i.e., solar cells based on a ?c-Si:H bottom cell and a-Si:H top cell). For the efficiency of n-i-p thin-film silicon solar cells the interfaces between different layers...
doctoral thesis 2015
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Yang, J. (author)
The white matter of the brain contains all the connections between different parts of the grey matter. Many diseases especially affect the brain’s white matter. For instance, the white matter tracts are destroyed in neurodegenerative diseases, such as Alzheimer’s disease. Accordingly, there is a large interest in features of the white matter to...
doctoral thesis 2015
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Yang, Z. (author)
Corrosion of reinforcing steel is a major culprit to durability and serviceability of concrete structures. This problem is highly relevant for civil engineering structures in the transport sector, such as bridges, tunnels, harbour quays and parking structures. The dominant aggressive external influence is the chloride load from de-icing salts or...
doctoral thesis 2015
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Yang, S. (author)
In most types of networks (e.g., optical or transportation networks), finding one or more best paths from a source to a destination, is one of the biggest concerns of network users and providers. This process is known as routing. The routing problems differ accordingly depending on different application scenarios with their respective routing...
doctoral thesis 2015
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Yang, X. (author)
High speed X-ray tomography is a promising tool to visualize the time-resolved gas distribution for fluidized beds. The tomography unit at Delft University of Technology is composed of three X-ray tubes and three double-layer detector arrays. The X-ray tubes are places at 120? around the fluidized bed. The detector arrays are placed opposite to...
doctoral thesis 2015
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Yang, Y. (author)
Shear loading on structures has been recognized as one of the most relevant actions determining structural safety since the 19th century. In the case of reinforced concrete structures, despite the great efforts that have been made through experimental and theoretical research over many years, the nature of the shear failure process of a...
doctoral thesis 2014
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