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Liu, L. (author), Xu, W. (author), Penard, W. (author), Zlatanova, S. (author)In this paper, we leverage spatial model to process indoor localization results and then improve the track consisting of measured locations. We elaborate different parts of spatial model such as geometry, topology and semantics, and then present how they contribute to the processing of indoor tracks. The initial results of our experiment reveal...conference paper 2015
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Pang, Min (author), Sun, Zhenping (author), Ji, Yanliang (author), Yang, Jingbin (author), Wang, Peiming (author), Xu, Yaling (author), Li, Huanhuan (author), Liu, Jiaying (author), Li, Fei (author)Characteristics of fly ash(FA) blended mortars (50%, 70% and 90%) at different curing ages (28 days and 180 days) under ammonium chloride solution(ACS) leaching were investigated. Mass loss under leaching, initial CaO content, Ca(OH)2 content(CH), content of chemical bonded water, and hydration degree of blended pastes were tested by XRF and DSC...conference paper 2021
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Xu, Jingyi (author), Li, Z. (author), Gao, Li (author), Ma, Junyi (author), Liu, Qi (author), Zhao, Yanan (author)The deep reinforcement learning-based energy management strategies (EMS) have become a promising solution for hybrid electric vehicles (HEVs). When driving cycles are changed, the neural network will be retrained, which is a time-consuming and laborious task. A more efficient way of choosing EMS is to combine deep reinforcement learning (DRL)...conference paper 2022
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Xu, S. (author), Liu, X. (author), Tabakovic, A. (author), Schlangen, E. (author)Incorporating self-healing technology in asphalt pavement has been demonstrated to have great potential to prolong its service life. To this aim, the calcium alginate capsules encapsulating rejuvenator were manufactured and proved to have sufficient thermal stability and mechanical resistance to survive the asphalt production and compaction...conference paper 2018
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Xu, Jiawei (author), Lin, Qiuyang (author), DIng, Ming (author), Liu, Y. (author), Van Hoof, Chris (author), Serdijn, W.A. (author), Van Helleputte, Nick (author)Simultaneous measurement of Electrocardiogram (ECG) and bio-impedance (BioZ) via disposable health patches is desired for patients suffering from chronic cardiovascular and respiratory diseases. However, a sensing IC must consume ultra-low power under a sub-volt supply to comply with miniaturized and disposable batteries. This work presents...conference paper 2018
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Blossey, P.N. (author), Bretherton, C.S. (author), Zhang, M. (author), Cheng, A. (author), Endo, S. (author), Heus, T. (author), Liu, Y. (author), Lock, A.P. (author), De Roode, S.R. (author), Xu, K.M. (author)Subtropical marine low cloud sensitivity to an idealized climate change is compared in six large-eddy simulation (LES) models as part of CGILS. July cloud cover is simulated at three locations over the subtropical northeast Pacific Ocean, which are typified by cold sea surface temperatures (SSTs) under well-mixed stratocumulus, cool SSTs under...journal article 2013
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Zhang, M. (author), Bretherton, C.S. (author), Blossey, P.N. (author), Austin, P.H. (author), Bacmeister, J.T. (author), Bony, S. (author), Brient, F. (author), Cheedela, S.K. (author), Cheng, A. (author), Del Genio, A.D. (author), De Roode, S.R. (author), Endo, S. (author), Franklin, C.N. (author), Golaz, J.C. (author), Hannay, C. (author), Heus, T. (author), Isotta, F.A. (author), Dufresne, J.L. (author), Kang, I.S. (author), Kawai, H. (author), Köhler, M. (author), Larson, V.E. (author), Liu, Y. (author), Lock, A.P. (author), Lohmann, U. (author), Khairoutdinov, M.F. (author), Molod, A.M. (author), Neggers, R.A.J. (author), Rasch, P. (author), Sandu, I. (author), Senkbeil, R. (author), Siebesma, A.P. (author), Siegenthaler-Le Drian, C. (author), Stevens, B. (author), Suarez, M.J. (author), Xu, K.M. (author), Von Salzen, K. (author), Webb, M.J. (author), Wolf, A. (author), Zhao, M. (author)CGILS—the CFMIP-GASS Intercomparison of Large Eddy Models (LESs) and single column models (SCMs)—investigates the mechanisms of cloud feedback in SCMs and LESs under idealized climate change perturbation. This paper describes the CGILS results from 15 SCMs and 8 LES models. Three cloud regimes over the subtropical oceans are studied: shallow...journal article 2013
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Liu, Chenxi (author), Xu, Yanlin (author), Liu, Hanqing (author), Lin, Mingtuan (author), Zha, Song (author)A terahertz metamaterial with switching characteristics from optical buffering to absorbing performance is realized by incorporating a phase-change film of vanadium dioxide. By introducing the electromagnetically induced transparency behavior based on simple strip pairs, the slow light effect with group delay up to 3.5 ps is obtained. When...journal article 2021
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Xu, Yanghui (author), Ou, Q. (author), Li, Xiaoming (author), Wang, Xintu (author), van der Hoek, J.P. (author), Liu, Gang (author)The transport and fate of nanoplastics (NPs) in aquatic environments are closely associated with their colloidal stability, which is affected by aging and natural organic matter (NOM) adsorption. This study systematically investigated the combined effects of photoaging and NOM (e.g. humic acids, HA; and a model protein, bovine serum albumin, BSA...journal article 2022
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Xu, S. (author), Liu, X. (author), Tabakovic, A. (author), Schlangen, E. (author)Microwave heating has been shown to be an effective method of heating asphalt concrete and in turn healing the damage. As such, microwave heating holds great potential in rapid (1–3 min) and effective damage healing, resulting in improvement in the service life, safety, and sustainability of asphalt pavement. This study focused on the microwave...journal article 2021
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Liu, C. (author), Malladi, S.R.K. (author), Xu, Q. (author), Chen, Jianghua (author), Tichelaar, F.D. (author), Zhuge, Xiaodong (author), Zandbergen, H.W. (author)Age-hardening in Al alloys has been used for over a century to improve its mechanical properties. However, the lack of direct observation limits our understanding of the dynamic nature of the evolution of nanoprecipitates during age-hardening. Using in-situ (scanning) transmission electron microscopy (S/TEM) while heating an Al-Cu alloy, we...journal article 2017
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Liu, Y. (author), Xu, M. (author), Portela, L. (author), Garbin, V. (author)Emulsions stabilized by nanoparticles, known as Pickering emulsions, exhibit remarkable stability, which enables applications ranging from encapsulation, to advanced materials, to chemical conversion. The layer of nanoparticles at the interface of Pickering droplets is a semi-permeable barrier between the two liquid phases, which can affect the...journal article 2023
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Xu, S. (author), Liu, X. (author), Tabakovic, A. (author), Schlangen, E. (author)Self-healing asphalt, aimed to produce a sustainable asphalt pavement using green technology, has been studied in the past two decades. Technologies including encapsulated rejuvenator and induction heating have been proposed, demonstrated in the laboratory, and gradually evaluated in field application. This paper looks into the synergy effect...journal article 2020
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Xu, S. (author), Liu, X. (author), Tabakovic, A. (author), Schlangen, E. (author)Self-healing asphalt, which is designed to achieve autonomic damage repair in asphalt pavement, offers a great life-extension prospect and therefore not only reduces pavement maintenance costs but also saves energy and reduces CO<sub>2</sub> emissions. The combined asphalt self-healing system, incorporating both encapsulated rejuvenator and...journal article 2021
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Hua, Zhongsheng (author), Wu, Xiaobin (author), Zhu, Zengli (author), He, Jiwen (author), He, Shiwei (author), Liu, Huan (author), Xu, Liang (author), Yang, Y. (author), Zhao, Zhuo (author)Exploring more efficient and low-cost electrocatalysts to replace platinum (Pt) is highly desired to promote the practical hydrogen production through water splitting. Herein, a facile and effective strategy is proposed to fabricate self-standing Al<sub>3</sub>Ni<sub>2</sub>/Ni electrode with controlled phase composition and surface...journal article 2022
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Xu, H. (author), Ragno, E. (author), Tan, Jinkai (author), Antonini, A. (author), Bricker, J.D. (author), Jonkman, Sebastiaan N. (author), Liu, Qing (author), Wang, Jun (author)Extreme surges and rainfall represent major driving factors for compound flooding in estuary regions along the Chinese coast. The combined effect of extreme surges and rainfall (that is, compound floods) might lead to greater impacts than if the drivers occurred in isolation. Hence, understanding the frequency and severity of compound...journal article 2023
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Tu, Botao (author), Yang, Xinkui (author), Xu, S. (author), Liang, X. (author), Liu, C. (author), Jiang, Jian (author), Fan, Lulu (author), Tu, Liangliang (author)Using solid waste to replace limestone filler in asphalt concrete can not only reduce the cost of road construction, but also improve the utilization rate of solid waste. In this study, PHC pile waste concrete (PPWC) was innovatively used to replace limestone filler in asphalt mixture and its effect on the physical and rheological properties...journal article 2023
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Bordin, A. (author), Wang, Guanzhong (author), Liu, Chun Xiao (author), ten Haaf, S.L.D. (author), van Loo, N. (author), Mazur, G.P. (author), Xu, D. (author), van Driel, D. (author), Zatelli, F. (author), Gazibegovic, Sasa (author), Badawy, Ghada (author), Bakkers, Erik P.A.M. (author), Wimmer, M.T. (author), Kouwenhoven, Leo P. (author), Dvir, T. (author)A short superconducting segment can couple attached quantum dots via elastic cotunneling (ECT) and crossed Andreev reflection (CAR). Such coupled quantum dots can host Majorana bound states provided that the ratio between CAR and ECT can be controlled. Metallic superconductors have so far been shown to mediate such tunneling phenomena, albeit...journal article 2023
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Sun, Y. (author), Kang, Xuanwu (author), Deng, Shixiong (author), Zheng, Yingkui (author), Wei, Ke (author), Xu, Linwang (author), Wu, Hao (author), Liu, Xinyu (author)Gallium nitride (GaN) has attracted increased attention because of superior material properties, such as high electron saturation velocity and high electrical field strength, which are promising for high-power microwave applications. We report on a high-performance vertical GaN-based Schottky barrier diode (SBD) and its demonstration in a...journal article 2021
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Wang, Xintu (author), Xu, Yanghui (author), Ou, Q. (author), Chen, Wenwen (author), van der Meer, W.G.J. (author), Liu, G. (author)The excessive use and accumulation of water-soluble polymers (WSPs, known as “liquid plastics”) in the environment can pose potential risks to both ecosystems and human health, but the environmental fate of WSPs remains unclear. Here, the adsorption behavior of WSPs with different molecular weight on kaolinite (Kaol) and montmorillonite (Mt)...journal article 2024