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Liu, Lingya (author), Hua, Cunqing (author), Xu, Jing (author), Leus, G.J.T. (author), Wang, Yiyin (author)This article focuses on greedy approaches to select the most informative k sensors from N candidates to maximize the Fisher information, i.e., the determinant of the Fisher information matrix (FIM), which indicates the volume of the information ellipsoid (VIE) constructed by the FIM. However, it is a critical issue for conventional greedy...journal article 2023
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Yang, Jinxin (author), Wu, Zhifeng (author), Menenti, M. (author), Wong, Man Sing (author), Xie, Yanhua (author), Zhu, Rui (author), Abbas, Sawaid (author), Xu, Yong (author)Urban morphology affects the sensible heat flux and net radiation exchange which can alter urban heat mitigation plans. This study first parameterized the geometric effects on the net radiation, and then calculated the net radiation and sensible heat flux in the urban landscape of Hong Kong. Considering that the sensible heat flux is the main...journal article 2023
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Bai, Wei (author), Xu, X. (author), Liu, Yaolan (author), Liang, Yunxiao (author), Shen, Yijie (author), Han, Zhenyu (author), Sheng, Zhendong (author), Chen, Rong (author), Zhu, Minhao (author)Systematic experimental investigations were conducted to study the microstructures and impact toughness of each heat affected zone (HAZ) formed during rail flash-butt welding. A high-strength carbide-free bainitic rail steel was subjected to different thermal simulation cycles to separately reproduce each HAZ subzone by tailoring the peak...journal article 2023
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Yang, Huiru (author), Wang, S. (author), Huang, Qianming (author), Tan, C. (author), Gao, Chenshan (author), Xu, Siyuan (author), Ye, Huaiyu (author), Zhang, Kouchi (author)Flexible strain sensors based on nanomaterials have sparked a lot of interest in the field of wearable smart electronics. Laser induced graphene (LIG) based sensors in particular stand out due to their straightforward fabrication procedure, three-dimensional porous structures, and exceptional electromechanical capabilities. Recent studies...journal article 2023
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Zhuo, Fangping (author), Zhou, Xiandong (author), Gao, Shuang (author), Dietrich, Felix (author), Braga Groszewicz, P. (author), Fulanović, Lovro (author), Breckner, Patrick (author), Xu, Bai Xiang (author), Kleebe, Hans Joachim (author)We report an intrinsic strain engineering, akin to thin filmlike approaches, via irreversible high-temperature plastic deformation of a tetragonal ferroelectric single-crystal BaTiO3. Dislocations well-aligned along the [001] axis and associated strain fields in plane defined by the [110]/[1¯10] plane are introduced into the volume, thus...journal article 2023
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Lin, P. (author), Liu, X. (author), Ren, S. (author), Xu, Jian (author), Li, Yi (author), Li, Mingliang (author)The film thickness of asphalt mixtures is critical for determining their performance and aging durability. However, understanding of the appropriate film thickness and its influence on performance and aging behavior for high-content polymer-modified asphalt (HCPMA) mixtures is still limited. This research aims to examine the relationship between...journal article 2023
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Xu, Y. (author), Zhang, Xiao Zheng (author), Casalino, D. (author), Bi, Chuan Xing (author)An inverse acoustic method is presented in this work, which allows to determine the spatial and temporal distribution of unsteady rotating forces from microphone array measurements. The method is based on the usage of a space–time regularization with a mixed norm. The proposed method can take advantage of a prior knowledge of the space–time...journal article 2023
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Hu, Weidong (author), Xu, Zhihao (author), Jiang, Huanyu (author), Liu, Qingguo (author), Yao, Zhiyu (author), Tan, Zhen (author), Ligthart, L.P. (author)The terahertz frequency modulation continuous-wave (THz FMCW) imaging technology has been widely used in non-destructive testing applications. However, THz FMCW real-aperture radar usually has a small depth of field and poor lateral resolution, thus restricting the high-precision imaging application. This paper proposes a 150-220 GHz FMCW...journal article 2023
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Zhao, Guofeng (author), Moulijn, J.A. (author), Kapteijn, F. (author), Dautzenberg, Frits M. (author), Xu, Bin (author), Lu, Yong (author)Heterogeneous catalysis plays a pivotal role in the current chemical and energy vectors production. Notably, to fully utilize the intrinsic activity and selectivity of a catalyst, the chemical reactor has to be designed and operated optimally to achieve enhanced heat/mass transfer, well-defined contact time of reactants, uniform flow pattern,...journal article 2023
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Wang, Wei (author), Liu, Dongli (author), Xu, Peng (author), Yang, Laurence Tianruo (author), Liang, K. (author)It has become a trend for clients to outsource their encrypted databases to remote servers and then leverage the Searchable Encryption technique to perform secure data retrieval. However, the method has yet to be considered a crucial need for replication on searchable encrypted data. It calls for challenging works on Dynamic Searchable...journal article 2023
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Huang, Qian Ming (author), Yang, Huiru (author), Wang, S. (author), Liu, X. (author), Tan, C. (author), Luo, Anxin (author), Xu, Siyuan (author), Zhang, Kouchi (author), Ye, H. (author)Laser-induced graphene (LIG) has aroused a wide range of research interests ranging from micro-nano energy devices to the Internet of Things (IoT). Nevertheless, the non-degradability of most-used synthetic polymer carbon sources poses a serious threat to the environment. In this work, ecofriendly chitosan-based derivatives, including...journal article 2023
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Xu, J. (author), Koffas, S. (author), Ersoy, Oǧuzhan (author), Picek, S. (author)Graph Neural Networks (GNNs) have achieved promising performance in various real-world applications. Building a powerful GNN model is not a trivial task, as it requires a large amount of training data, powerful computing resources, and human expertise. Moreover, with the development of adversarial attacks, e.g., model stealing attacks, GNNs...conference paper 2023
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Kumar Ashish, Prabin (author), Sreeram, Anand (author), Xu, Xiong (author), Chandrasekar, Pavan (author), Jagadeesh, A. (author), Adwani, Dheeraj (author), Kumar Padhan, Rabindra (author)The widespread production and consumption of plastics is a pressing global issue that requires multifaceted approaches and solutions. In terms of recycling, one of the ways to repurpose waste plastics in the construction industry would be to utilize them for asphalt pavement-related applications. Although this approach can potentially provide...review 2023
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Shi, Can (author), Zhou, Yu (author), Xu, Lei (author), Zhang, Xu (author), Guo, Y. (author)The dynamic performance of a railway track subjected to moving trains depends strongly on track support conditions. In reality, even for the well-constructed and well-maintained tracks, sleeper support stiffness and global track stiffness vary substantially along the track, which affects the train-track dynamic interactions, causing rapid...review 2023
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Tan, Xiaotong (author), Xu, Heyong (author), Tian, R. (author)Delayed detached eddy simulation (DDES) is used to simulate the flow field around the conformal optical window turret and the flat optical window turret. The aero-optical effect and the far-field diffraction result of the two optical windows at 0°, 90° and 180° angles are quantitatively analyzed based on the flow field around the turret....journal article 2023
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Yao, Zhiyu (author), Hu, Weidong (author), Feng, Zhiyan (author), Zhang, Wenlong (author), Liu, Yang (author), Xu, Zhihao (author), Ligthart, L.P. (author)Passive multifrequency microwave sensors frequently struggle with difficulties of nonuniform spatial resolution among multiple channels. The raw measurements in the land-sea transition zone are seriously contaminated. Conventional analytical deconvolution techniques suffer from the tradeoff between spatial resolution enhancement and noise...journal article 2023
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Xu, Y. (author), Šavija, B. (author)A composite can have properties much better than the components it is made of. This work proposes a three-dimensional auxetic cementitious-polymeric composite structure (3D-ACPC) which incorporates 3D printed polymeric shell with cementitious mortar. Uniaxial compression experiments are performed on the 3D-ACPC to study their quasi-static...journal article 2023
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Xu, J. (author), Abad, Gorka (author), Picek, S. (author)Backdoor attacks have been demonstrated as a security threat for machine learning models. Traditional backdoor attacks intend to inject backdoor functionality into the model such that the backdoored model will perform abnormally on inputs with predefined backdoor triggers and still retain state-of-the-art performance on the clean inputs. While...conference paper 2023
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Wan, Z. (author), Xu, Y. (author), He, S. (author), Chen, Y. (author), Xie, J. (author), Šavija, B. (author)Direct ink writing of cementitious materials can be an alternative way for creating vascular self-healing concrete by intentionally incorporating hollow channels in the cementitious matrix. In this study, a 3D-printable fibre reinforced mortar was first developed. Three groups of specimens were fabricated using direct ink writing, where the...journal article 2023
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Xie, J. (author), Xu, Y. (author), Wan, Z. (author), Ghaderiaram, A. (author), Schlangen, E. (author), Šavija, B. (author)The high deformation capacity of auxetic cementitious cellular composites (ACCCs) makes them promising for strain-based energy harvesting applications in infrastructure. In this study, a novel piezoelectric energy harvester (PEH) with ACCCs and surface-mounted PVDF film based on strain-induced piezoelectric mechanisms has been designed,...journal article 2023