Searched for: author%3A%22Chen%2C+J.%22
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Chen, B. (author), Chen, J. (author), França de Mendonça Filho, F. (author), Sun, Yubo (author), van Zijl, Marc Brito (author), Copuroglu, Oguzhan (author), Ye, G. (author)
Municipal solid waste incineration (MSWI) bottom ash, due to its high mineral content, presents great potential as supplementary cementitious material (SCM). Weathering, also known as aging, is a treatment process commonly employed in waste management to minimize the risk of heavy metal leaching from MSWI bottom ash. Using weathered MSWI...
journal article 2024
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Chen, J. (author), Dwarka, V.N.S.R. (author), Vuik, Cornelis (author)
The Helmholtz equation is related to seismic exploration, sonar, antennas, and medical imaging applications. It is one of the most challenging problems to solve in terms of accuracy and convergence due to the scalability issues of the numerical solvers. For 3D large-scale applications, high-performance parallel solvers are also needed. In this...
journal article 2024
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Chen, J. (author), Dwarka, V.N.S.R. (author), Vuik, Cornelis (author)
We present a matrix-free parallel iterative solver for the Helmholtz equation related to applications in seismic problems and study its parallel performance. We apply Krylov subspace methods, GMRES, Bi-CGSTAB and IDR(s), to solve the linear system obtained from a second-order finite difference discretization. The Complex Shifted Laplace...
conference paper 2024
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Qiu, Xiujiao (author), Chang, Z. (author), Chen, J. (author), Schlangen, E. (author), Ye, G. (author), Schutter, Geert De (author)
In our former paper, based on a published 3D reactive transport model at microscale with the capability of simulating the chemical reactions involved in ASR, the location of expansive ASR gel related to the reactivity of aggregate, temperature, aggregate porosity and silica content in aggregate, is clarified. Based on the simulation results,...
journal article 2023
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Qiu, Xiujiao (author), Chen, J. (author), Ye, G. (author), De Schutter, Geert (author)
A 3D reactive transport model at microscale is proposed for simulating the chemical reaction process of alkali silica reaction (ASR) thermodynamically and kinetically including the dissolution of reactive silica, the nucleation and growth of ASR products and the dissolution of calcium hydroxide (CH) and calcium silicate hydrate (C-S-H) as a...
journal article 2022
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Qiu, Xiujiao (author), Chen, J. (author), Ye, G. (author), De Schutter, Geert (author)
Prediction of alkali silica reaction is still difficult due to the lack of a comprehensive understanding of its chemical fundamentals. In-site experimentally revealing the fundamentals is not realistic as ASR shows over several years or even decades and is affected by many factors. In this paper, by utilizing a 3D reactive-transport...
journal article 2022
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Qiu, Xiujiao (author), Chen, J. (author), Ye, G. (author), De Schutter, Geert (author)
ASR (alkali-silica reaction) is one of the toughest durability problems in engineering. However, the damage induced by ASR is still fairly unpredictable due to the lack of microstructural information of cement-based materials affected by ASR, while the microstructure determines the global performance. In order to fill this gap, a multiscale...
conference paper 2021
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Hunfeld, Luuk B. (author), Chen, J. (author), Niemeijer, André R. (author), Ma, Shengli (author), Spiers, Christopher J. (author)
Rock materials show dramatic dynamic weakening in large-displacement (m), high-velocity (∼1 m/s) friction experiments, providing a mechanism for the generation of large, natural earthquakes. However, whether such weakening occurs during induced M3-4 earthquakes (dm displacements) is unknown. We performed rotary-shear experiments on simulated...
journal article 2021
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Qiu, Xiujiao (author), Chen, J. (author), Deprez, Maxim (author), Cnudde, Veerle (author), Ye, G. (author), De Schutter, Geert (author)
The microstructure of alkali-reactive aggregates, especially the spatial distribution of the pore and reactive silica phase, plays a significant role in the process of the alkali silica reaction (ASR) in concrete, as it determines not only the reaction front of ASR but also the localization of the produced expansive product from where the...
journal article 2021
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Chen, J. (author), Martin, Pablo (author), Xu, Z. (author), Manzano, Hegoi (author), Dolado, Jorge S. (author), Ye, G. (author)
Portland cement is the most produced material in the world. The hydration process of cement consists of a group of complex chemical reactions. In order to investigate the mechanism of cement hydration, it is vital to study the hydration of each phase separately. An integrated model is proposed in this paper to simulate the dissolution of...
journal article 2021
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Chen, J. (author)
Cancer is known as one of the leading causes of death in the world with difficult<br/>diagnose at early stages, poor prognosis and high mortality. Animal-based<br/>experiments and clinical trials have always been the main approach for cancer<br/>research, albeit they may have limitations and ethical issues. Mathematicalmodeling<br/>as an...
doctoral thesis 2020
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Chen, J. (author), Verberne, B. A. (author), Niemeijer, A. R. (author)
A (micro)physical understanding of the transition from frictional sliding to plastic or viscous flow has long been a challenge for earthquake cycle modeling. We have conducted ring-shear deformation experiments on layers of simulated calcite fault gouge under conditions close to the frictional-to-viscous transition previously established in...
journal article 2020
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Verbene, Berend A. (author), van den Ende, Martijn P.A (author), Chen, J. (author), Niemeijer, André R. (author), Spiers, Christopher J. (author)
The strength properties of fault rocks at shearing rates spanning the transition from crystal-plastic flow to frictional slip play a central role in determining the distribution of crustal stress, strain, and seismicity in tectonically active regions. We review experimental and microphysical modelling work, which is aimed at elucidating the...
journal article 2020
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Chen, J. (author), van den Ende, Martijn P.A. (author), Niemeijer, André R. (author)
The maximum fault strength and rate of interseismic fault strengthening (“healing”) are of great interest to earthquake hazard assessment studies, as they directly relate to event magnitude and recurrence time. Previous laboratory studies have revealed two distinct frictional healing behaviors, referred to as Dieterich-type and non-Dieterich...
journal article 2020
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Chen, J. (author), Weihs, D. (author), Vermolen, F.J. (author)
Oncolytic virotherapy is known as a new treatment to employ less virulent viruses to specifically target and damage cancer cells. This work presents a cellular automata model of oncolytic virotherapy with an application to pancreatic cancer. The fundamental biomedical processes (like cell proliferation, mutation, apoptosis) are modeled by the...
journal article 2020
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Shen, X. J. (author), Li, D. Z. (author), Tang, S. (author), Chen, J. (author), Fang, H. (author), Wang, G. D. (author)
It is still a big challenge to obtain excellent low-temperature toughness for bulk steel materials. Delamination is an effective method to improve low-temperature toughness. In the present study, delamination toughening in a low carbon microalloyed steel plate with elongated and ultrafine-grained microstructure rolled in the dual-phase region...
journal article 2019
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Chen, J. (author), Weihs, Daphne (author), Vermolen, F.J. (author)
More than eighty percent of pancreatic cancer involves ductal adenocarcinoma with an abundant desmoplastic extracellular matrix surrounding the solid tumor entity. This aberrant tumor microenvironment facilitates a strong resistance of pancreatic cancer to medication. Although various therapeutic strategies have been reported to be effective...
journal article 2019
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Chen, J. (author), Ye, G. (author)
Cracking is inevitable during the service period of concrete structures. They are preferential ingression channels for aggressive ions. It is difficult or even impossible to repair all the cracks due to the limitation of practical conditions. However, cracks have potentials to self-heal due to further hydration and carbonization. The effect of...
journal article 2019
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Chen, J. (author), Weihs, Daphne (author), Vermolen, F.J. (author)
During metastasis of cancer, cell migration plays a crucial role, which is normally accompanied by morphological evolution. To simulate cell deformation, we develop a phenomenological, computational model involving deformation of a cell as well as its nucleus. The migration of a single cell is orchestrated by a generic signal (e.g. a chemokine...
conference paper 2018
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Chen, J. (author), Weihs, Daphne (author), van Dijk, Marcel (author), Vermolen, F.J. (author)
Cell migration plays an essential role in cancer metastasis. In cancer invasion through confined spaces, cells must undergo extensive deformation, which is a capability related to their metastatic potentials. Here, we simulate the deformation of the cell and nucleus during invasion through a dense, physiological microenvironment by developing...
journal article 2018
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