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design of modified model of intelligent assembly digital twins based on optical fiber sensor network

Digital Communications and Networks 2024年第5期10卷 1542-1552页

作者： Zhichao Liu Jinhua Yang Juan Wang Lin Yue School of Opto-electronic Engineering Changchun University of Science and Technology key laboratory of Optoelectric Measurement and Optical Information Transmission Technology of ministry of education Changchun University of Science and Technology Department of Actuarial Science and Business Analytics Macquarie UniversityNSW

Intelligent assembly of large-scale,complex structures using an intelligent manufacturing platform represents the future development direction for industrial *** large-scale structural assembly processes,several bottleneck problems occur in the existing auxiliary assembly ***,the traditional LiDARbased assembly technology is often limited by the openness of the manufacturing environment,in which there are blind spots,and continuous online assembly adjustment thus cannot be ***,for assembly of large structures,a single-station LiDAR system cannot achieve complete coverage,which means that a multi-station combination method must be used to acquire the complete three-dimensional data;many more data errors are caused by the transfer between stations than by the measurement accuracy of a single station,which means that the overall system's measurement and adjustment errors are increased ***,because of the large numbers of structural components contained in a large assembly,the accumulated errors may lead to assembly interference,but the LiDAR-assisted assembly process does not have a feedback perception capability,and thus assembly component loss can easily be caused when assembly interference ***,this paper proposes to combine an optical fiber sensor network with digital twin technology,which will allow the test data from the assembly entity state in the real world to be applied to the "twin" model in the virtual world and thus solve the problems with test openness and data *** problem of station and perception feedback is also addressed and represents the main innovation of this *** system uses an optical fiber sensor network as a flexible sensing medium to monitor the strain field distribution within a complex area in real time,and then completes real-time parameter adjustment of the virtual assembly based on the distributed *** areas include areas that are laser-unreachable,areas

关键词： Digital twins Intelligent manufacturing Intelligent assembly Optical fiber sensor network Assembly condition monitoring algorithm

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Metal-organic frameworks derived transition metal phosphides for electrocatalytic water splitting

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Journal of Energy Chemistry 2022年第5期31卷 494-520页

作者： Li-Ming Cao Jia Zhang Li-Wen Ding Zi-Yi Du Chun-Ting He key laboratory of Functional Small Molecules for ministry of education College of Chemistry and Chemical EngineeringJiangxi Normal UniversityNanchang 330022JiangxiChina key laboratory for Green Chemistry of Jiangxi Province Nanchang 330022JiangxiChina

It is critical to synthesize high-efficiency electrocatalysts to boost the performance of water splitting to meet the requirements of industrial applications. Metal-organic frameworks(MOFs) can function as ideal molecular platforms for the design of highly reactive transition metal phosphides(TMPs), a kind of candidates for high-efficiently electrocatalytic water splitting. The intrinsic activity of the electrocatalysts can be greatly improved via modulating the electronic structure of the catalytic center through the MOF precursors/templates. Moreover, the carbon layer converted in-situ by the organic ligands can not only protect the TMPs from being degraded in the harsh electrochemical environments, but also avoid agglomeration of the catalysts, thereby promoting their activities and stabilities. Furthermore,heteroatom-containing ligands can incorporate N, S or P, etc. atoms into the carbon matrixes after conversion, regulating the coordination microenvironments of the active centers as well as their electronic structures. In this review, we first summarized the latest developments in MOF-derived TMPs by the unique advantages in metal, organic ligand, and morphology regulations for electrocatalytic water splitting. Secondly, we concluded the critical scientific issues currently facing for designing state-of-the-art TMP-based electrocatalysts. Finally, we presented an outlook on this research area, encompassing electrocatalyst construction, catalytic mechanism research, etc.

关键词： Metal-organic framework Transition metal phosphide Water splitting Electrocatalyst electronic structure

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Meter-Scale Thin-Walled Structure with Lattice Infill for Fuel Tank Supporting Component of Satellite:Multiscale design and Experimental Verification

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Computer Modeling in Engineering & Sciences 2024年第1期138卷 201-220页

作者： Xiaoyu Zhang Huizhong Zeng Shaohui Zhang Yan Zhang Mi Xiao Liping Liu Hao Zhou Hongyou Chai Liang Gao Beijing key laboratory of Lightweight Multi-Functional Composite Materials and structures Beijing Institute of TechnologyBeijing100081China Beijing key laboratory of Intelligent Space Robotic Systems Technology and Applications Beijing Institute of Spacecraft System EngineeringChina Academy of Space TechnologyBeijing100094China key laboratory of Metallurgical equipment and Control Technology Ministry of EducationWuhan University of Science and TechnologyWuhan430081China State key laboratory of Digital Manufacturing equipment and Technology Huazhong University of Science and TechnologyWuhan430074China

Lightweight thin-walled structures with lattice infill are widely desired in satellite for their high stiffness-to-weight ratio and superior buckling strength resulting fromthe sandwich *** structures can be fabricated bymetallic additive manufacturing technique,such as selective laser melting(SLM).However,the maximum dimensions of actual structures are usually in a sub-meter scale,which results in restrictions on their appliance in aerospace and other *** this work,a meter-scale thin-walled structure with lattice infill is designed for the fuel tank supporting component of the satellite by integrating a self-supporting lattice into the thickness optimization of the *** designed structure is fabricated by SLM of AlSi10Mg and cold metal transfer welding ***-static mechanical tests and vibration tests are both conducted to verify the mechanical strength of the designed large-scale lattice thin-walled *** experimental results indicate that themeter-scale thin-walled structure with lattice infill could meet the dimension and lightweight requirements of most spacecrafts.

关键词： Thin-walled structure lattice infill supporting component selective laser melting satellite

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Machine learning and microstructure design of polymer nanocomposites for energy storage application

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High Voltage 2022年第2期7卷 242-250页

作者： Yu Feng Wenxin Tang Yue Zhang Tiandong Zhang Yanan Shang Qingguo Chi Qingguo Chen Qingquan Lei Department of High Voltage Key Laboratory of Engineering Dielectrics and Its ApplicationMinistry of EducationHarbin University of Science and TechnologyHarbinChina School of Electrical and electronic Engineering Harbin University of Science and TechnologyHarbinChina

Film dielectric capacitors have been widely used in high‐power electronic *** design of microstructure and the choice of fillers play an important role in nano-composites'energy storage *** learning methods can classify and summarise the limited data and then explore the promising composite *** this work,a dataset has been established,which contained a large amount of data on the maximum energy storage density of *** using processed visual image infor-mation to express the internal information of composite,the prediction accuracy of the prediction models built by three machine learning algorithms increase from 84.1%to 91.9%,80.9%to 68.9%,70.6%to 81.6%,*** calculating the branch weight in the random forest prediction model,the influence degree of different descriptors on the energy storage performance of nanocomposites is analysed.A total of 10 groups of composites with different structure and filler amount were prepared in the laboratory,which were used to verify the reliability of prediction ***,the effective filler's structure is explored by three prediction models and some suggestions for the interface design of filler are given.

关键词： composites composite prediction

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Characterization of Interface State Density of Ni/p-GaN structures by Capacitance/Conductance-Voltage-Frequency Measurements

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Chinese Physics Letters 2017年第9期34卷 82-86页

作者： Zhi-Fu Zhu He-Qiu Zhang Hong-Wei Liang Xin-Cun Peng Ji-Jun Zou Bin Tang Guo-Tong Du School of Physics Dalian University of Technology Dalian 116024 Engineering Research Center of Nuclear Technology Application (ministry of education) East China Institute of Technology Nanchang 330013 Jiangxi Province Engineering Research Center of New Energy Technology and equipment (ministry of education) East China Institute of Technology Nanchang 330013 School of Microelectronics Dalian University of Technology Dalian 116024 State key laboratory on Integrated Optoelectronics School of Electronic Science and Engineering Jilin University Changchun 130012

For the frequency range of I kHz-lOMHz, the interface state density of Ni contacts on p-GaN is studied using capacitance-voltage （C-V） and conductance-frequency-voltage （G-f-V） measurements at room temperature. To obtain the real capacitance and interface state density of the Ni/p-GaN structures, the effects of the series resistance （Rs） on high-frequency （SMHz） capacitance values measured at a reverse and a forward bias are investigated. The mean interface state densities obtained from the CHF-CLF capacitance and the conductance method are 2 ×1012 e V-1 cm-2 and 0.94 × 1012 eV-1 cm-2, respectively. Furthermore, the interface state density derived from the conductance method is higher than that reported from the Ni/n-GaN in the literature, which is ascribed to a poor crystal quality and to a large defect density of the Mg-doped p-GaN.

关键词： GaN Characterization of Interface State Density of Ni/p-GaN structures by Capacitance/Conductance-Voltage-Frequency Measurements Ni

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Folding of Tubular Waterbomb

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Research 2020年第1期2020卷 158-165页

作者： Jiayao Ma Huijuan Feng Yan Chen Degao Hou Zhong You key laboratory of Mechanism Theory and equipment design of ministry of education Tianjin University135 Yaguan RoadTianjin 300350China School of Mechanical Engineering Tianjin University135 Yaguan RoadTianjin 300350China Department of Engineering Science University of OxfordParks RoadOxford OX13PJUK

Origami has recently emerged as a promising building block of mechanical metamaterials because it offers a purely geometric design approach independent of scale and constituent *** folding mechanics of origami-inspired metamaterials,i.e.,whether the deformation involves only rotation of crease lines(rigid origami)or both crease rotation and facet distortion(nonrigid origami),is critical for fine-tuning their mechanical properties yet very difficult to determine for origami patterns with complex ***,we characterize the folding of tubular waterbomb using a combined kinematic and structural *** for the first time uncover that a waterbomb tube can undergo a mixed mode involving both rigid origami motion and nonrigid structural deformation,and the transition between them can lead to a substantial change in the ***,we derive theoretically the range of geometric parameters for the transition to occur,which paves the road to program the mechanical properties of the waterbomb *** expect that such analysis and design approach will be applicable to more general origami patterns to create innovative programmable metamaterials,serving for a wide range of applications including aerospace systems,soft robotics,morphing structures,and medical devices.

关键词： deformation rotation rigid

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Characteristics of motorized spindle supported by active magnetic bearings

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Chinese Journal of Aeronautics 2014年第6期27卷 1619-1624页

作者： Xie Zhenyu Yu Kun Wen Liantang Wang Xiao Zhou Hongkai Department of design Engineering Nanjing University of Aeronautics and Astronautics Jiangsu key laboratory of Precision and Micro-Manufacturing Technology Jiangxi Zhonghang Optics equipment Co. Ltd.

A motorized spindle supported by active magnetic bearings（AMBs） is generally used for ultra-high-speed machining. Iron loss of radial AMB is very great owing to high rotation speed, and it will cause severe thermal deformation. The problem is particularly serious on the occasion of large power application, such as all electric aero-engine. In this study, a prototype motorized spindle supported by five degree-of-freedom AMBs is developed. Homopolar and heteropolar AMBs are independently adopted as radial bearings. The influences of the two types of radial AMBs on the dynamic characteristics of the motorized spindle are comparatively investigated by theoretical analysis, test modal analysis and actual operation of the system. The iron loss of the two types of radial AMBs is analyzed by finite element software and verified through run-down experiments of the system. The results show that the structures of AMB have less influence on the dynamic characteristics of the motorized spindle. However, the homopolar structure can effectively reduce the iron loss of the radial AMB and it is useful for improving the overall performance of the motorized spindle.

关键词： Dynamic characteristics Finite element analysis Loss Magnetic bearings Modal analysis Spindle design

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Hybrid quantum-classical convolutional neural networks

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Science China(Physics,Mechanics & Astronomy) 2021年第9期64卷 1-8页

作者： Junhua Liu Kwan Hui Lim Kristin LWood Wei Huang Chu Guo He-Liang Huang Information Systems Technology and design Singapore University of Technology and DesignSingapore 487372Singapore Forth AI Singapore 487372Singapore College of Engineering Design and ComputingUniversity of Colorado DenverColorado 80208USA Guangxi key laboratory of Optoelectronic Information Processing Guilin University of Electronic TechnologyGuilin 541004China key laboratory of Low-Dimensional Quantum structures and Quantum Control of ministry of education Department of Physics and Synergetic Innovation Center for Quantum Effects and ApplicationsHunan Normal UniversityChangsha 410081China Hefei National laboratory for Physical Sciences at Microscale and Department of Modern Physics University of Science and Technology of ChinaHefei 230026China Shanghai Branch CAS Centre for Excellence and Synergetic Innovation Centre in Quantum Information and Quantum PhysicsUniversity of Science and Technology of ChinaHefei 201315China Henan key laboratory of Quantum Information and Cryptography Zhengzhou 450000China

Deep learning has been shown to be able to recognize data patterns better than humans in specific circumstances or *** parallel,quantum computing has demonstrated to be able to output complex wave functions with a few number of gate operations,which could generate distributions that are hard for a classical computer to *** we propose a hybrid quantum-classical convolutional neural network(QCCNN),inspired by convolutional neural networks(CNNs)but adapted to quantum computing to enhance the feature mapping *** is friendly to currently noisy intermediate-scale quantum computers,in terms of both number of qubits as well as circuit’s depths,while retaining important features of classical CNN,such as nonlinearity and *** also present a framework to automatically compute the gradients of hybrid quantum-classical loss functions which could be directly applied to other hybrid quantum-classical *** demonstrate the potential of this architecture by applying it to a Tetris dataset,and show that QCCNN can accomplish classification tasks with learning accuracy surpassing that of classical CNN with the same structure.

关键词： quantum computing quantum machine learning hybrid quantum-classical algorithm convolutional neural network

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Atomic-Scale Layer-by-Layer Deposition of Fe SiAl@ZnO@Al_(2)O_(3) Hybrid with Threshold Anti-Corrosion and Ultra-High Microwave Absorption Properties in Low-Frequency Bands

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Nano-Micro Letters 2021年第10期13卷 308-321页

作者： Wei Tian Jinyao Li Yifan Liu Rashad Ali Yang Guo Longjiang Deng Nasir Mahmood Xian Jian National Engineering Researching Centre of Electromagnetic Radiation Control Materials Key Laboratory of Multi-Spectral Absorbing Materials and Structures of Ministry of EducationState Key Laboratory of Electronic Thin Films and Integrated DevicesSchool of Electronic Science and EngineeringUniversity of Electronic Science and Technology of ChinaChengdu 611731People’s Republic of China School of electronic Science and Engineering The Yangtze Delta Region Institute HuzhouUniversity of Electronic Science and Technology of ChinaHuzhou 313001People’s Republic of China School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu 611731People’s Republic of China School of Electrical and Information Engineering Panzhihua UniversityPanzhihua 617000People’s Republic of China School of Engineering RMIT UniversityMelbourneVictoria 3001Australia

Developing highly efficient magnetic microwave absorb-ers(MAs)is crucial,and yet challenging for anti-corrosion properties in extremely humid and salt-induced foggy ***,a dual-oxide shell of ZnO/Al_(2)O_(3) as a robust barrier to FeSiAl core is introduced to mitigate corrosion *** FeSiAl@ZnO@Al_(2)O_(3) layer by layer hybrid structure is realized with atomic-scale precision through the atomic layer deposition *** to the unique hybrid structure,the FeSiAl@ZnO@Al_(2)O_(3) exhibits record-high micro-wave absorbing performance in low-frequency bands covering L and S bands with a minimum reflection loss(RLmin)of-50.6 dB at 3.4 *** with pure FeSiAl(RLmin of-13.5 dB,a bandwidth of 0.5 GHz),the RLmin value and effective bandwidth of this designed novel absorber increased up to~3.7 and~3 times,***-thermore,the inert ceramic dual-shells have improved 9.0 times the anti-corrosion property of FeSiAl core by multistage barriers towards corrosive medium and obstruction of the electric *** is attributed to the large charge transfer resistance,increased impedance modulus|Z|0.01 Hz,and frequency time constant of FeSiAl@ZnO@Al_(2)O_(3).The research demonstrates a promising platform toward the design of next-generation MAs with improved anti-corrosion properties.

关键词： Atomic layer deposition Magnetic alloy Dual-oxide-shells Microwave absorption Anti-corrosion

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A simple and efficient criterion for ready screening of potential topological insulators

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Science Bulletin 2017年第24期62卷 1649-1653页

作者： Guohua Cao Huijun Liu Xing-Qiu Chen Yan Sun Jinghua Liang Rui Yu Zhenyu Zhang key laboratory of Artificial Micro- and Nano-structures of ministry of education and School of Physics and Technology Wuhan University Wuhan 430072 China Shenyang National laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China International Center for Quantum design of Functional Materials (ICQD) Hefei National Laboratory for Physical Sciences at the Microscale and Synergetic Innovation Center of Quantum Information and Quantum Physics University of Science and Technology of China Hefei 230026 China

Topological materials are a new and rapidly expanding class of quantum matter. To date, identification of the topological nature of a given compound material demands specific determination of the appropriate topological invariant through detailed electronic structure calculations. Here we present an efficient criterion that allows ready screening of potential topological materials, using topological insulators as prototypical examples. The criterion is inherently tied to the band inversion induced by spin-orbit coupling,and is uniquely defined by a minimal number of two elemental physical properties of the constituent elements: the atomic number and Pauling electronegativity. The validity and predictive power of the criterion is demonstrated by rationalizing many known topological insulators and potential candidates in the tetradymite and half-Heusler families, and the underlying design principle is naturally also extendable to predictive discoveries of other classes of topological materials.

关键词： Topological insulators Band inversion Spin-orbit coupling Predictive design

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