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Toward intelligent manufacturing: label characters marking and recognition method for steel products with machine vision

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Advances in Manufacturing 2014年第1期2卷 3-12页

作者： Qi-Jie Zhao Peng Cao Da-wei tu School of Mechatronics Engineering and Automation Shanghai Key Laboratory of Intelligent Manufacturing and RoboticsShanghai university

Correctly coding materials and identifying characters marked on materials are very important for steel manufacturing industry to realize informatization management and intelligent manufacturing. However, the steel products manufacturing is often in a high temperature environment, and there are a lot of material storage and retrieval processes, workers are not easily close to the environment and complete tasks, so it is a great challenge to automatically mark and identify characters on the steel products. This paper presents a framework of label characters marking and management for steel materials, furthermore, a kind of marked characters online detection and tracking method has been provided based on machine vision. In addition, some experiments have been done in BaoSteel to mark characters on hot billets and recognize them in multi situations, and the results show that the proposed method is practical, and has provided a helpful exploration in obtaining accurate fundamental data for the intelligent manufacturing system in steelworks.

关键词： Intelligent manufacturing Enterprisesinformatization Label character marking Machinevision Marked character recognition

Framework on robotic percussive riveting for aircraft assembly automation

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Advances in Manufacturing 2013年第2期1卷 112-122页

作者： Feng-Feng Xi Lin Yu Xiao-wei tu Robotic and Automation Center Shanghai University Department of Aerospace Engineering Ryerson University Department of Automation and Instruments Shanghai University

Presented in this paper is a framework for the implementation of a robotic percussive riveting system, a new robot application for aircraft assembly. It is shown here that a successful robot application to the automation of a process requires in-depth research of the process and the interaction with the robot. For this purpose, a process plan- ning-driven approach is proposed to guide a robot applica- tion research. A typical process planning will involve a list of key considerations including： process sequence, process parameters, process tooling, and process control. Through this list, a number of key research issues are identified for robotic percussive riveting, such as rivet pattern planning, rivet time determination, rivet tooling design and rivet insertion control. The detailed research on these issues has effectively created know-how for the successful implemen- tation of our robotic percussive riveting system.

关键词： Aircraft assembly Assembly automation Robotic riveting Percussive riveting Process planning

Real-time predictive sliding mode control method for AGV with actuator delay

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Advances in Manufacturing 2019年第4期7卷 448-459页

作者： Zhi Chen Jian Fu Xiao-wei tu Ao-Lei Yang Min-Rui Fei School of Mechatronic Engineering and Automation Shanghai UniversityShanghai 200444People's Republic of China College of Energy and Power Engineering Nanjing University of Science and TechnologyNanjing 210094People's Republic of China

In this paper,a predictive sliding mode control method based on multi-sensor fusion is proposed to solve the problem of insufficient accuracy in trajectory tracking caused by actuator *** controller,based on the kinematics model,uses an inner and outer two-layer structure to achieve decoupling of position control and heading control.A reference positional change rate is introduced into the design of controller,making the automatic guided vehicle(AGV)capable of real-time predictive control ability.A stability analysis and a proof of predictive sliding mode control theory are *** experimental results show that the new control algorithm can improve the performance of the AGV controller by referring to the positional change rate,thereby improving the AGV operation without derailing.

关键词： Predictive sliding mode control-Multi-sensor fusion Trajectory tracking Real-time decoupling

Properties and strengthening mechanism of brush plated nanoparticle reinforced composite coatings

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中国有色金属学会会刊：英文版 2004年第z1期14卷 182-185页

作者： DONG Shi-yun XU Bin-shi MA Shi-ning tu wei-yi National Key Laboratory for Remanufacturing Academy of Armored Force Engineering Beijing 100072 China National Key Laboratory for RemanufacturingAcademy of Armored Force Engineering Beijing 100072 China National Key Laboratory for RemanufacturingAcademy of Armored Force Engineering Beijing 100072 China National Key Laboratory for RemanufacturingAcademy of Armored Force Engineering Beijing 100072 China

Nanoparticle reinforced nickel matrix composite coatings, such as n-Al2O3/Ni, n-SiO2/Ni, n-SiC/Ni and n-TiO2/Ni, were fabricated by brush plating technique. Hardness, wear resistance and contact-fatigue resistance of the composite coatings were determined, and strengthening mechanism of the composite coatings was discussed. Results show that the composite coatings have superior properties to the Ni metal coating. Compared with properties of brush plated Ni metal coating, the composite coatings have hardness over 1.5 times and wear resistance capability of about 2.5 times. The strengthening mechanism of the composite coatings mainly includes fine-crystal grain effect, nanoparticle dispersion effect and dislocation effect.

关键词： nanoparticles brush plated coatings strengthening mechanism

Giant Spin Transfer Torque in Atomically Thin Magnetic Bilayers

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Chinese Physics Letters 2020年第10期37卷 68-75页

作者： weihao Cao Matisse wei-Yuan tu Jiang Xiao Wang Yao Department of Physics University of Hong KongHong KongChina Department of Physics University of California San DiegoLa JollaCA 92093-0319USA HKU-UCAS Joint Institute of Theoretical and Computational Physics at Hong Kong Hong KongChina Department of Physics and State Key Laboratory of Surface Physics Fudan UniversityShanghai 200433China Institute for Nanoelectronics Devices and Quantum Computing Fudan UniversityShanghai 200433China

In cavity quantum electrodynamics,the multiple reflections of a photon between two mirrors defining a cavity is exploited to enhance the light-coupling of an intra-cavity *** show that this paradigm for enhancing the interaction of a flying particle with a localized object can be generalized to spintronics based on van der Waals 2D *** tunneling through a magnetic bilayer,we find that the spin transfer torques per electron incidence can become orders of magnitude larger thanℏ/2,made possible by electron's multi-reflection path through the ferromagnetic monolayers as an intermediate of their angular momentum *** a broad energy range around the tunneling resonances,the damping-like spin transfer torque per electron tunneling features a universal value of(ℏ/2)tan(θ/2),depending only on the angleθbetween the *** findings expand the scope of magnetization manipulations for high-performance and high-density storage based on van der Waals magnets.

关键词： tunneling magnetization magnets

数字乡村建设对农村居民消费影响的异质性及特征

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安徽农业科学 2024年第11期52卷 209-213页

作者：许玉荣张天晓涂维亮长江大学经济与管理学院湖北荆州434000 荆州农业科学院湖北荆州434000

以我国31个省级行政区的面板数据为基础,对数字乡村发展进行评价,并采用双向固定效应模型进行分析,结果表明:数字乡村建设能够促进农村居民消费的提高,通过稳健性检验可知该影响存在时滞性;通过异质性分析发现,数字乡村建设对不同地区... 详细信息

以我国31个省级行政区的面板数据为基础,对数字乡村发展进行评价,并采用双向固定效应模型进行分析,结果表明:数字乡村建设能够促进农村居民消费的提高,通过稳健性检验可知该影响存在时滞性;通过异质性分析发现,数字乡村建设对不同地区农村居民消费的正向促进作用始终存在且呈先升后降低的倒“U”形趋势的新特征,可能是数字乡村建设对农村居民消费影响的边际贡献递减和时滞性原因。

关键词：数字乡村农村居民消费异质性新特征

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湖北省农村居民共同富裕水平测度

河北农业科学 2024年第3期28卷 21-25页

作者：刘新平张天晓涂维亮长江大学经济与管理学院湖北荆州434023 荆州农业科学院湖北荆州434023

中国式现代化是全体人民共同富裕的现代化。基于面源数据,构建湖北省农村居民共同富裕水平评价指标体系,利用熵值法对湖北省农村居民共同富裕水平进行测度与收敛性分析。结果表明:2016—2020年湖北省共同富裕水平综合得分不断提升,共同... 详细信息

中国式现代化是全体人民共同富裕的现代化。基于面源数据,构建湖北省农村居民共同富裕水平评价指标体系,利用熵值法对湖北省农村居民共同富裕水平进行测度与收敛性分析。结果表明:2016—2020年湖北省共同富裕水平综合得分不断提升,共同富裕指数均值快速稳步提高,富裕程度、共享程度、共有程度、均衡程度4个指数均有不同程度的提高;共同富裕指数的变异系数具有σ收敛性,共享程度、共有程度和均衡程度3个指数是影响共同富裕指数的主要因素;共同富裕、富裕程度、共享程度、共有程度、均衡程度5个指数均存在β收敛性。提出加强财政支出,重视弱势群体保障;加强教育和文化建设,提高农民素质;加强城乡协调性,实施城乡统筹;加强区域协调发展,促进共同富裕的对策建议。

关键词：湖北省共同富裕熵值法

Core-shell mesoporous carbon hollow spheres as Se hosts for advanced Al-Se batteries

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International Journal of Minerals,Metallurgy and Materials 2024年第5期31卷 899-906页

作者： Haiping Lei Tianwei wei Jiguo tu Shuqiang Jiao State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China

Incorporating a selenium(Se)positive electrode into aluminum(Al)-ion batteries is an effective strategy for improving the overall battery ***,the cycling stability of Se positive electrodes has challenges due to the dissolution of intermediate reaction *** this work,we aim to harness the advantages of Se while reducing its limitations by preparing a core-shell mesoporous carbon hollow sphere with a titanium nitride(C@TiN)host to load 63.9wt%Se as the positive electrode material for Al-Se *** the physical and chemical confinement offered by the hollow mesoporous carbon and TiN,the obtained core-shell mesoporous carbon hollow spheres coated with Se(Se@C@TiN)display superior utilization of the active material and remarkable cycling *** a result,Al-Se batteries equipped with the as-prepared Se@C@TiN composite positive electrodes show an initial discharge specific capacity of 377 mAh·g^(-1)at a current density of 1000 mA·g^(-1)while maintaining a discharge specific capacity of 86.0 mAh·g^(-1)over 200 *** improved cycling performance is ascribed to the high electrical conductivity of the core-shell mesoporous carbon hollow spheres and the unique three-dimensional hierarchical architecture of Se@C@TiN.

关键词： aluminum-selenium batteries intermediate products core-shell mesoporous carbon hollow sphere cycling performance

The higher grain production, the more social deprivation? A case study of Henan province in traditional agricultural areas of China

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Journal of Mountain Science 2018年第1期15卷 167-180页

作者： GAO Jun-bo QIAO wei-feng LIU Yan-sui LI Yu-rui tu wei ZHANG Yong-xian Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences School of Geography Science Xinyang Normal University School of Geography Science Nanjing Normal University Department of Geology & Geography Georgia Southern University Institute of Surveying And Mapping Information Engineering University

This paper examines the spatial-temporal dynamics of inequality from the perspective of social deprivation in the context of continuous growth of grain production using national census data from 2000 and 2010 for Henan province,*** analytical results show an overall level of social deprivation that is high and a widening social deprivation gap at the county *** social deprivation shows great spatiotemporal heterogeneity,the higher deprived counties are mainly distributed in central and eastern Henan province,while counties with lower social deprivation are clustered in northwestern regions,formed a belt-shape spatial differential between the south(higher deprived counties clustered)and northwest(low deprived counties clustered)Henan in 2000,and changed toward a core-periphery semi annular spatial structure in 2010,the low deprived counties surrounded by high deprived *** social deprivation shows a"west low and east high"spatial pattern,similar to the grain production in Henan *** development level was low in most counties in Yudong plain despite of keeping the continuous increase of grain production,meaning the higher grain output did not result in the more social development expected in Chinese traditional agricultural areas,and the regional disparity is expected to increase in the near future if development conditions are not changed,which could inspire more targeted rural governance options.

关键词： Spatial-temporal change Grain production Social inequality Social deprivation Henan province