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SSRN 2023年

作者： Li, Qizhong Zhang, Yixuan Ji, Baifeng Zhang, Song Tu, Rong Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan430070 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China School of Civil Engineering and Architecture Wuhan University of Technology Wuhan430070 China Chaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory Chaozhou521000 China Wuhan University of Technology Advanced Engineering Technology Research Institute of Zhongshan City Guangdong Zhongshan528400 China

The deposition rate distribution during halide chemical vapour deposition of silicon carbide (SiC) is influenced by equipment structure, and a uniform film can be obtained by optimising the chamber structure. A detailed chemical reaction mechanism was incorporated into a reaction chamber model to verify the SiC deposition kinetics model. We studied the influence of spray hole size, baffle size, and baffle positioning on the deposition rate uniformity. The results show that reducing the size of the spray holes leads to a "double peak" in the deposition rate across the substrate from the edge to both sides, which first increases and then decreases. The "double peak" disappears when the spray hole size is reduced. With an increase in baffle size, the uniformity of the deposition rate first increased and then decreased. Moreover, the baffle displacement had little effect on the deposition rate when the baffle-to-spray plate distance was at least 45 mm. Meanwhile, the deposition uniformity gradually worsened when the baffle distance was reduced. The spray plate and baffle reduced the extreme difference in deposition rates across the effective deposition area by improving the velocity field of the reaction chamber. A uniform SiC film can be obtained using the proposed optimisation method. © 2023, The Authors. All rights reserved.

关键词： Structural optimization

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Involvement of Right Superior Frontal in Distracted Driving

SSRN

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SSRN 2022年

作者： Shi, Changcheng Yan, Fuwu Zhang, Jiawen Yu, Hao Peng, Fuming Yan, Lirong Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Foshan528200 China Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan430070 China Hubei Research Center for New Energy & Intelligent Connected Vehicle Wuhan University of Technology Wuhan430070 China

Differences and correlations in brain area activation between driving distractions (visual, auditory, or cognitive distraction) and normal driving were compared among 30 subjects using electroencephalogram (EEG). Visual, auditory and cognitive subtasks were designed, which occurred randomly during simulated driving, to investigate the effects of different distractions on drivers' neural activities. We found the right intraorbital superior and the infraorbital frontal gyrus were significantly activated during visual distraction. The left and right dorsolateral frontal gyrus were significantly activated during auditory distraction. The right intraorbital superior, infraorbital, and dorsolateral superior frontal gyrus were significantly activated during cognitive distraction. Therefore, prefrontal cortical areas, especially the right frontal cortical area, are most affected by distracted driving. © 2022, The Authors. All rights reserved.

关键词： Electroencephalography

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Correction: Improving microstructure and mechanical properties of thin-wall part fabricated by wire arc additive manufacturing assisted with high-intensity ultrasound

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Journal of Materials Science 2024年第33期59卷 15920-15920页

作者： Ji, Feilong Hu, Zeqi Qin, Xunpeng Ni, Mao Xiong, Xiaochen Liu, Guocheng Hubei Key Laboratory of Advanced Technology for Automotive Components School of Automotive Engineering Wuhan University of Technology Wuhan China Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan China Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan China

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Background Filtering and Object Detection with Roadside LiDAR Data

Background Filtering and Object Detection with Roadside LiDA...

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Electron Device and Mechanical Engineering (ICEDME), International Conference on

作者： Zihan Liu Qizhong Li Shengming Mei Miaohua Huang Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan China

The roadside LiDAR(light detection and ranging) sensors can obtain relevant information about all roadway users by collecting real-time 3D point cloud data of surrounding objects. In order to analyze the point cloud data of roadway users, background filtering and object detection are essential steps. This paper proposes a background filtering method based on point correlation by KDTree neighborhood searching and an adaptive threshold Euclidean clustering method. In order to improve the detection speed, background filtering will be performed on the original point cloud data before Euclidean clustering, so as to delete a large number of useless background points, and the clustering results will be distinguished by cuboid frame markers. The experimental results show that the single-frame point cloud clustering speed has increased by 31.3%, the clustering speed has been significantly improved.

关键词： Three-dimensional displays Laser radar Correlation Filtering Object detection Real-time systems Distance measurement

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Erratum to:Microstructure and texture evolution of nonoriented silicon steel during the punching process

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International Journal of Minerals,Metallurgy and Materials 2023年第6期30卷 1225-1225页

作者： Xiang Fang Wei Wang François Brisset Anne-Laure Helbert Thierry Baudin School of Automotive Engineering Wuhan University of TechnologyWuhan 430070China Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of TechnologyWuhan 430070China Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan University of TechnologyWuhan 430070China Hubei Research Center for New Energy&Intelligent Connected Vehicle Wuhan University of TechnologyWuhan 430070China Institut de Chimie Moléculaire et des Matériaux d’Orsay UniversitéParis-SaclayCNRS91405 OrsayFrance

The original online version of this article unfortunately contained a *** author’s name in the original online version is incorrect,which is:Xiang Fang,Wei Wang,François Brisset,Anne-Laure Helberg,and Thierry Ba... 详细信息

关键词： Microstructure steel evolution

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Near-Surface Defects Identification in water immersion ultrasonic testing based on FFT and Phase Spectrum Difference

Near-Surface Defects Identification in water immersion ultra...

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2020 IEEE Far East Forum on Nondestructive Evaluation/Testing: New technology and Application, FENDT 2020

作者： Guan, Shan-Yue Li, Li Wang, Xiao-Kai Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan430070 China Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan430070 China

ISBN: (纸本)9781665440820

Ultrasonic pulse-echo testing always exist a near-surface blind zone, because the defect echo overlaps with the interface echo, it is difficult to accurately identify the near-surface defect. This paper presents an investigation with fast Fourier transform (FFT) combined with phase spectrum difference (PSD) for detecting near-surface defects in metal materials. Firstly, the phase spectrum of defect signal and free-defect signal are obtained by FFT, and the PSD between them is calculated. The FFT is utilized again to acquire the main frequency and corresponding period of PSD. Then, the offset time is proposed to represent the location of the near-surface defects. The theoretical correctness of the proposed method is validated by the ultrasonic simulation signals of single defect, multi-defects and noise interference in the near-surface blind zone. Finally, the water immersion ultrasonic testing experiment is carried out to detect the near-surface artificial defects of test specimens from a large ring forging. The experimental result revealed that the calculation of near-surface defects depth by offset time has high accuracy. © 2020 IEEE.

关键词： Fast Fourier transforms

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Advances in bioorganic molecules inspired degradation and surface modifications on Mg and its alloys

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Journal of Magnesium and Alloys 2022年第3期10卷 723-745页

作者： Lei Cai Di Mei Zhao-Qi Zhang Yuan-ding Huang Lan-Yue Cui Shao-Kang Guan Dong-Chu Chen M.Bobby Kannan Yu-feng Zheng Rong-Chang Zeng Corrosion Laboratory for Light Metals College of Materials Science and EngineeringShandong University of Science and TechnologyQingdao 266590China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450002China MagIC-Magnesium Innovation Centre and Institute of Metallic Biomaterials Helmholtz-Zentrum HereonMax-Planck Straûe 1Geesthacht 21502Germany School of Materials Science and Energy Engineering Foshan UniversityFoshan 528000China School of Engineering University of NewcastleCallaghanNSW 2308Australia College of Science and Engineering James Cook UniversityTownsvilleQL 4811Australia School of Materials Science and Engineering Peking UniversityBeijing 100871China Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of TechnologyWuhan 430070China

Mg alloys possess biodegradability,suitable mechanical properties,and biocompatibility,which make them possible to be used as biodegradable ***,the uncontrollable degradation of Mg alloys limits their general *** addition to the factors from the metallic materials themselves,like alloy compositions,heat treatment process and microstructure,some external factors,relating to the test/service environment,also affect the degradation rate of Mg alloys,such as inorganic salts,bioorganic small molecules,bioorganic *** influence of bioorganic molecules on Mg corrosion and its protection has attracted more and more *** this work,the cutting-edge advances in the influence of bioorganic molecules(i.e.,protein,glucose,amino acids,vitamins and polypeptide)and their coupling effect on Mg degradation and the formation of protection coatings were *** research orientations of biomedical Mg alloys in exploring degradation mechanisms in vitro were proposed,and the impact of bioorganic molecules on the protective approaches were also explored.

关键词： Magnesium alloy Biomaterial Bioorganic molecules Degradation Coating Glucose.

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An accurate detection method for randomly distributed welding slags using an improved Yolo v3 network

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International Journal of Computational Materials Science and Surface Engineering 2021年第3-4期10卷 195-208页

作者： Tu, Qiuping Liu, Hongdi Qu, Chao Tian, Linli Zhu, Dahu Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan430070 China Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan University of Technology Wuhan430070 China

Irregular welding slag spatters during welding of the car body are considered as extremely unavoidable defects. Detecting these tiny defects exhibiting properties in position and number is a challenging task. In this paper, a novel computational framework by modifying the structure of the Yolo v3 network is developed to accurately detect the randomly distributed welding slags. It has been verified that the improved Yolo v3 algorithm has improved accuracy by 7.4%, recall rate Rr by 6.8%, and real-time detection frame rate of 31.25 fps compared with Yolo v3, the detection performance is excellent in comparison with Faster RCNN and Yolo v3. Therefore, the improved algorithm can improve the accuracy of welding slag detection, which is beneficial to realtime welding slag detection and promote automated production and processing in industry. Copyright © 2021 Inderscience Enterprises Ltd.

关键词： Defects

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Strength and Plasticity Coordination Improvement Mechanism in Network Structure TiBw/TA15 Composite Via Multi-DOF Forming

SSRN

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SSRN 2024年

作者： Zhang, Jishi Han, Xinghui Hu, Xuan Hua, Lin Chai, Fang Su, Baoyi Fan, Xinxin Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan430070 China School of Automotive Engineering Wuhan University of Technology Wuhan430070 China School of Mechanical Engineering Qilu University of Technology Shandong Academy of Sciences Jinan250353 China Shandong Institute of Mechanical Design and Research Jinan250103 China

TiBw/TA15 composite with network TiB whisker (TiBw) reinforcement architecture has high strength but poor plasticity. It is challenging to improve the plasticity of TiBw/TA15 composites. In the current work, strength and plasticity coordination improvement of TiBw/TA15 composite is achieved by multi-degrees of freedom forming (multi-DOF forming) technology. The α phase spheroidization behaviour and strength-plasticity coordination improvement mechanism are studied. It is revealed that with increasing deformation amount of multi-DOF forming, α phase spheroidization and refinement become more obvious, and the mechanism is that the rotation of hard TiBw particles causes large strain in the deformation path, i.e., the rotation regions of TiBw tips. Meanwhile, when dislocation movement is blocked by TiBw, the dislocation gradually piles up along the rotation regions of TiBw tips by single slip and cross slip, which accelerates α phase spheroidization behaviour. Moreover, with increasing deformation amount, the strength and plasticity are coordinately improved. The tensile strength and elongation increase linearly from 972 MPa to 1239 MPa (increased by 27.5%) and from 5.6% to 7.9% (increased by 41.1%) as the deformation condition advanced from the sintered state to the 40% deformation condition, respectively. Improved plasticity can be attributed to grain and TiBw refinement, which leads to more uniform plastic deformation and fewer stress concentrations in the tensile process. The strengthening mechanism can be attributed to the load transfer strengthening of TiBw, grain refinement strengthening and dislocation strengthening. © 2024, The Authors. All rights reserved.

关键词： Tensile strength

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Two-stage space construction for real-time modeling of distributed parameter systems under sparse sensing

arXiv

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arXiv 2023年

作者： Wei, Peng School of Automation Wuhan University of Technology No.122 Luoshi Road Hubei Wuhan430070 China Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan430070 China Department of Systems Engineering City University of Hong Kong Tat Chee Avenue Kowloon 999077 Hong Kong

Numerous industrial processes can be defined using distributed parameter systems (DPSs). This study introduces a two-stage spatial construction approach for real-time modeling of DPSs in cases of limited sensors. Initially, a discrete space-completion approach is created to recuperate the spatiotemporal patterns of non-monitored locations under sparse sensing. The high-dimensional space construction method is employed to derive continuous spatial basis functions (SBFs). The identification and adjustment of the nonlinear temporal model are carried out via the long short-term memory (LSTM) neural network. Eventually, the amalgamation of the derived SBFs and temporal model results in a spatially continuous model. The use of a cubic B-spline surface is validated as an effective solution for optimizing space construction in the sense of least squares approximation. Experimental tests conducted on a pouch-type Li-ion battery demonstrate the efficacy of the proposed modeling technique under sparse sensing. This work highlights the promise of sparse sensors in real-time full-space modeling for large-scale battery energy storage systems. Copyright © 2023, The Authors. All rights reserved.

关键词： Least squares approximations

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