Searched for: author%3A%22Chen%2C+Y.%22
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Chen, Y. (author)
Extrusion-based 3D concrete printing (3DCP), as one of the emerging techniques, has received considerable attention from both academia and industry, due to its numerous benefits for concrete construction, through enhancing the freedom of architectural design, eliminating formwork, optimizing material use, and decreasing wastes, labors and costs....
doctoral thesis 2021
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Chen, Y. (author)
Single-photon emission computed tomography (SPECT) is a well-established nuclear imaging modality for studying functional and pathological properties of the brain. Conventional general purpose SPECT systems typically offer a spatial resolution of about 10 mm with a sensitivity of 0.01-0.02%. A few dedicated brain SPECT scanners have been...
doctoral thesis 2021
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Chen, Y. (author)
Topological band theory has contributed to some of the most astonishing developments in solid-state physics. The unique attributes that arise from topological effects are at the focus of modern experimental and theoretical research. Weyl point, a topological defect at the Fermi surface, enables topological transitions and transport phenomena....
doctoral thesis 2021
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Chen, Y. (author), Copuroglu, Oguzhan (author), Romero Rodriguez, C. (author), França de Mendonça Filho, F. (author), Schlangen, E. (author)
For many 3D printed cementitious materials, air voids may play a dominant role in the interlayer bond strength. However, to date, far too little attention has been paid to reveal the air void characteristics in 3D printed cementitious materials. Therefore, to fill this gap, this study attempts to provide an example of systematically...
journal article 2021
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Chen, Y. (author), Goorden, M.C. (author), Beekman, F.J. (author)
In clinical brain SPECT, correction for photon attenuation in the patient is essential to obtain images which provide quantitative information on the regional activity concentration per unit volume (kBq). This correction generally requires an attenuation map (map) denoting the attenuation coefficient at each voxel which is often derived from...
journal article 2021
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Li, Z. (author), Liang, X. (author), Chen, Y. (author), Ye, G. (author)
The high autogenous shrinkage of alkali-activated materials made from slag and fly ash is recognised as a major drawback with regard to the use as construction materials. In this study, metakaolin was introduced into the alkali-activated slag-fly ash (AASF) paste to mitigate the autogenous shrinkage. The shrinkage mitigation mechanism of...
journal article 2021
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Li, H. (author), Li, Zixuan (author), Li, Kenli (author), Rellermeyer, Jan S. (author), Chen, Y. (author), Li, Keqin (author)
Sparse Tucker Decomposition (STD) algorithms learn a core tensor and a group of factor matrices to obtain an optimal low-rank representation feature for the High-Order, High-Dimension, and Sparse Tensor (HOHDST). However, existing STD algorithms face the problem of intermediate variables explosion which results from the fact that the...
journal article 2021
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Li, Z. (author), Beltran, Irving Alfredo Flores (author), Chen, Y. (author), Šavija, B. (author), Ye, G. (author)
In this study, glass wool waste was utilized by means of alkali-activation with blast furnace slag. Reaction kinetics, workability, mechanical properties and autogenous shrinkage of alkali-activated slag and glass wool were comprehensively studied. Results indicated an optimal modulus (SiO<sub>2</sub>/Na<sub>2</sub>O) of the activator related...
journal article 2021
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Chen, Y. (author), Nazarov, Y.V. (author)
We investigate transport in a superconducting nanostructure housing a Weyl point in the spectrum of Andreev bound states. A minimum magnet state is realized in the vicinity of the point. One or more normal-metal leads are tunnel-coupled to the nanostructure. We have shown that this minimum magnetic setup is suitable for realization of all...
journal article 2021
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Zincir-Heywood, Nur (author), Casale, Giuliano (author), Carrera, David (author), Chen, Y. (author), Dhamdhere, Amogh (author), Inoue, Takeru (author), Lutfiyya, Hanan (author), Samak, Taghrid (author)
contribution to periodical 2021
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Li, Z. (author), Lu, T. (author), Chen, Y. (author), Wu, B. (author), Ye, G. (author)
This study aims to predict the autogenous shrinkage of alkali-activated concrete (AAC) based on slag and fly ash. A variety of analytical and numerical models are available for the prediction of autogenous shrinkage of ordinary Portland cement (OPC) concrete, but these models are found to show dramatic discrepancies when applied for AAC due...
journal article 2021
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Wang, B. (author), de Jong, W.M. (author), van Bueren, Ellen (author), Ersoy, A. (author), Chen, Y. (author)
Most High-Speed Railway (HSR) station areas in China can be found at the urban periphery or in suburban areas, a phenomenon that has often been criticised. While debate about the influence these location choices have on the economic and sustainable development of cities rages on, little attention has been paid to the decision-making processes...
journal article 2021
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Chang, Z. (author), Xu, Y. (author), Chen, Y. (author), Gan, Y. (author), Schlangen, E. (author), Šavija, B. (author)
In this work, the lattice model is applied to study the printing process and quantify the buildability (i.e., the maximum height that can be printed) for 3D concrete printing (3DCP). The model simulates structural failure by incorporating an element birth technique, time-dependent stiffness and strength, printing velocity, non-uniform...
journal article 2021
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Han, Rui (author), Li, Dong (author), Ouyang, Junyan (author), Liu, Chi Harold (author), Wang, Guoren (author), Wu, Dapeng Oliver (author), Chen, Y. (author)
To enable insight extractions without the risk of information leakage, deep learning (DL) models are increasingly built on federated edge participants holding local data, in combination with differential privacy (DP). The core theme is to tradeoff learning accuracy by adding statistically calibrated noises, particularly to local gradients of...
journal article 2021
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Gan, Y. (author), Vandamme, Matthieu (author), Chen, Y. (author), Schlangen, E. (author), van Breugel, K. (author), Šavija, B. (author)
This paper presents an experimental investigation on the short-term creep recovery of cement paste at micrometre length scale. Micro-cantilever beams were fabricated and tested with 8 different loading series using the nanoindenter. It is found that cement pastes show high recovery ratios (&gt;80%) even subjected to very high stress levels....
journal article 2021
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Chen, Y. (author), He, S. (author), Zhang, Y. (author), Wan, Z. (author), Copuroglu, Oguzhan (author), Schlangen, E. (author)
This paper aims to investigate the influences of high Portland cement substitutions (&gt;60 wt%) by low-grade calcined clay (CC) and limestone (LF) on 3D concrete printability, stiffness evolution and early-age hydration. Results show that, with the same dosage of admixtures (superplasticizer and viscosity modifier), increasing LF and CC...
journal article 2021
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Chen, Y. (author)
In recent years, creating an urban legacy has gradually become the focus of event-led development or regeneration in cities. World Expo 2010 Shanghai, held under the theme “Better city, Better life” was organised to emphasise the concept of “city of harmony” and to promote the sustainable development of the city. The event itself is considered...
report 2020
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Chen, Y. (author), Qu, L. (author)
The rapid development of Chinese megacities in the last decades have been mainly characterized by top-down planning and large-scale urban development and redevelopment, as well as by using place-making as a tool for city branding. This approach has also been used in other countries and has been constantly criticized for replacing old...
journal article 2020
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Chen, Y. (author), Chaves Figueiredo, S. (author), Li, Z. (author), Chang, Z. (author), Jansen, K. (author), Copuroglu, Oguzhan (author), Schlangen, E. (author)
In 3D concrete printing (3DCP), it is necessary to meet contradicting rheological requirements: high fluidity during pumping and extrusion, and high stability and viscosity at rest to build the layered structure. In this paper, the impact of the hydroxypropyl methylcellulose (HPMC)-based viscosity-modifying admixture (VMA) on the 3D printability...
journal article 2020
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Wang, Wenjing (author), Wang, Y. (author), Homem de Almeida Correia, G. (author), Chen, Y. (author)
In a multimodal public transport network, transfers are inevitable. Planning and managing an efficient transfer connection is thus important and requires an understanding of the factors that influence those transfers. Existing studies on predicting passenger transfer flows have mainly used transit assignment models based on route choice,...
journal article 2020
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