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Digital Twins in Industry5.0

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Research 2023年第3期2023卷 1-16页

作者： Zhihan lv Department of Game Design Faculty of ArtsUppsala UniversityUppsalaSweden

This work aims to explore the impact of Digital Twins Technology on industrial manufacturing in the context of Industry 5.0.A computer is used to search the Web of Science database to summarize the Digital Twins in Industry ***,the background and system architecture of Industry 5.0 are ***,the potential applications and key modeling technologies in Industry 5.0 are *** is found that equipment is the infrastructure of industrial scenarios,and the embedded intelligent upgrade for equipment is a Digital Twins primary *** the same time,Digital Twins can provide automated real-time process analysis between connected machines and data sources,speeding up error detection and *** addition,Digital Twins can bring obvious efficiency improvements and cost reductions to industrial *** Twins reflects its potential application value and subsequent potential value in Industry 5.0 through the *** is hoped that this relatively systematic overview can provide technical reference for the intelligent development of industrial manufacturing and the improvement of the efficiency of the entire business process in the Industrial X.O era.

关键词： value intelligent subsequent

Effect of grain size on mechanical property and corrosion resistance of the Ni-based alloy 690

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Journal of Materials Science & Technology 2018年第9期34卷 1685-1691页

作者： Jinlong lv Fracture and Reliability Research Institute School of Engineering Tohoku University

Mechanical property of coarse grained and nano/ultrafine grained alloy 690 and their corrosion resistance after immersion in high temperature borate buffer solution were investigated. The grain refinement significantly enhances the tensile strength of the alloy 690. In addition, the grain refinement facilitates the formation of the deformation twin which improves the ductility of the alloy 690. It has been found that the grain refinement promotes to form more Cr2 O3 on the surface of the alloy 690 in high temperature borate buffer solution. At the same time, the grain refinement inhibits the formation of spinel type *** hematite type oxides formed on nano/ultrafine grained alloy 690 improves its corrosion resistance in borate buffer solution. The hematite type oxides have a lower concentration of point defect than that of the spinel type oxides, which results in an excellent corrosion resistance of nano/ultrafine grained alloy 690. These results are supported by the Mott-Schottky analysis and the point defect model.

关键词： Alloys Buffer Deformation Electrochemical impedance spectroscopy Electrochemistry Interfaces Nanocrystalline Oxidation

In situ polymerization of poly(3,4-ethylenedioxythiophene)protective layer towards stable zinc anode

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Nano Research 2025年第1期18卷 382-394页

作者： Debin Luo Peng Zhou Xiaowei lv Panpan Sun Xiaohua Sun Hewei Zhao College of Materials and Chemical Engineering Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion MaterialsChina Three Gorges UniversityYichang 443002China Hubei Three Gorges Laboratory Yichang 443007China School of Chemistry Beihang UniversityBeijing 100191China

Aqueous zinc-ion devices are considered promising candidates for energy storage due to their high safety,low cost and relatively high energy ***,the dendrite growth,hydrogen evolution reaction(HER)and corrosion of the zinc anode significantly limit the development of Zn-ion ***,an inexpensive poly(3,4-ethylenedioxythiophene)(PEDOT)protective layer was constructed in situ on the Zn surface using electropolymerization to suppress dendrite growth and side reactions,thereby enhancing the reversibility of *** and theoretical calculations revealed that this hydrophilic protective layer promotes the desolvation process of hydrated Zn^(2+)and facilitates the transport of zinc ions,thus improving the thermodynamic and kinetic properties of Zn^(2+)deposition and inhibiting interfacial side ***,the optimized PEDOT@Zn symmetric battery exhibited a cycling stability exceeding 1250 h at 0.5 mA·cm^(-2)and 0.25 mAh·cm^(-2),with a significantly reduced overpotential(from 91.8 to 35 mV).With the assistance of the PEDOT protective layer,the PEDOT@Zn//Cu battery maintained approximately 99.5%Coulombic efficiency after 450 ***-situ scanning electron microscopy(SEM)and in situ optical microscopy characterizations further confirmed that the PEDOT protective layer can effectively suppress the growth of zinc ***,the Zn-ion capacitors assembled by the PEDOT@Zn and activated carbon also demonstrated outstanding cycling stability.

关键词： zinc-ion devices zinc anode poly(3 4-ethylenedioxythiophene)(PEDOT) dendrite desolvation process

Game theory in network security for digital twins in industry

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Digital Communications and Networks 2024年第4期10卷 1068-1078页

作者： Hailin Feng Dongliang Chen Haibin lv Zhihan lv School of Information Engineering Zhejiang A&F UniversityHangzhou311300China School of Data Science and Software Engineering Qingdao UniversityQingdao266000China North China Sea Offshore Engineering Survey Institute Ministry of Natural Resources North Sea BureauQingdao266000China Department of Game Design Faculty of ArtsUppsala UniversitySweden

To ensure the safe operation of industrial digital twins network and avoid the harm to the system caused by hacker invasion,a series of discussions on network security issues are carried out based on game *** the perspective of the life cycle of network vulnerabilities,mining and repairing vulnerabilities are analyzed by applying evolutionary game *** evolution process of knowledge sharing among white hats under various conditions is simulated,and a game model of the vulnerability patch cooperative development strategy among manufacturers is *** this basis,the differential evolution is introduced into the update mechanism of the Wolf Colony Algorithm(WCA)to produce better replacement individuals with greater probability from the perspective of both attack and *** the simulation experiment,it is found that the convergence speed of the probability(X)of white Hat 1 choosing the knowledge sharing policy is related to the probability(x0)of white Hat 2 choosing the knowledge sharing policy initially,and the probability(y0)of white hat 2 choosing the knowledge sharing policy *** y0?0.9,X converges rapidly in a relatively short *** y0 is constant and x0 is small,the probability curve of the“cooperative development”strategy converges to *** is concluded that the higher the trust among the white hat members in the temporary team,the stronger their willingness to share knowledge,which is conducive to the mining of loopholes in the *** greater the probability of a hacker attacking the vulnerability before it is fully disclosed,the lower the willingness of manufacturers to choose the"cooperative development"of vulnerability *** the improved wolf colonyco-evolution algorithm can obtain the equilibrium solution of the"attack and defense game model",and allocate the security protection resources according to the importance of *** study can provide an effective solution to protect the network security

关键词： Digital twins Industrial internet of things Network security Game theory Attack and defense

Effects of Na_(2)CO_(3)on reduction mechanism and kinetics of iron during deep reduction of ilmenite concentrate

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Journal of Iron and Steel Research International 2023年第3期30卷 419-428页

作者： Xiao-dong lv You-ling Hou Yun-tao Xin Wei lv Xue-wei lv Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and New Materials Chongqing UniversityChongqing 400044China College of Materials Science and Engineering Chongqing UniversityChongqing 400044China School of Metallurgy Northeastern UniversityShenyang 110819LiaoningChina

High-quality upgraded titanium slag obtained through semi-molten reduction with the addition of Na_(2)CO_(3)is important for the fluidizing chlorination process to produce TiO_(2)*** key is the effect of Na_(2)CO_(3)on the reduction behavior of ***,the effects of Na_(2)CO_(3)on reduction mechanism and kinetics of iron during deep reduction of ilmenite concentrate were *** results indicated that the metallization ratio of the reduced sample increased with increasing temperature,time,and dose of Na_(2)CO_(3).The addition of Na_(2)CO_(3)significantly accelerated the reduction of iron in the ilmenite concentrate and promoted the growth of iron ***,the addition of Na_(2)CO_(3)produced sodium iron titanates;thus,the metallization ratio of the sample decreased with an increase in the temperature and time when the temperature was above 1200℃and the time was more than 30 *** the doses of Na_(2)CO_(3)were 0,3,and 6 wt.%,the reduction of iron was controlled by the interfacial chemical reaction,both the interfacial chemical reaction and diffusion,and diffusion,respectively,and the apparent activation energies were 134.91,64.89,and 120.82 kJ/mol,respectively.

关键词： Ilmenite concentrate Sodium carbonate Metallization ratio Reduction mechanism Kinetics

Finite-Time Attack Detection and Secure State Estimation for Cyber-Physical Systems

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IEEE/CAA Journal of Automatica Sinica 2023年第10期10卷 2032-2034页

作者： Mi lv Yuezu lv Wenwu Yu Haofei Meng School of Cyber Science and Engineering Southeast UniversityNanjing 210096China School of Mathematics Southeast UniversityNanjing 210096China School of Automation Southeast UniversityNanjing 210096China

Dear Editor, This letter aims to investigate the problem of attack detection and state estimation when the system suffers from external malicious attacks. A finite-time reduce-order observer is designed, which can achieve attack detection at the preset time instant. Meanwhile, it is shown that the protection of the key nodes greatly improves the efficiency of secure state estimation. Finally, the proposed theory is applied to a general cyber-physical system to illustrate its effectiveness.

关键词： estimation Secure system

Microstructure and mechanical performance of AZ31/6061 lap joints welded by laser-TIG hybrid welding with Zn-Al alloy filler metal

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Journal of Magnesium and Alloys 2024年第8期12卷 3325-3338页

作者： Xinze lv Liming Liu Key Laboratory of Liaoning Advanced Welding and Joining Technology School of Materials Science and EngineeringDalian University of TechnologyDalian116024China

A series of Zn-xAl(x=0-35 wt.%)alloy filler metals were designed to join AZ31 Mg alloy to 6061 Al alloy by laser-TIG hybrid *** effect of Al content on the wettability of filler metals,microstructure evolution and strength of joint was *** results indicated that the strength of joints was improved with the increase of Al content in filler *** Zn-15Al filler was used,the ultimate fracture load reached the maximum of 1475.3 N/cm,which was increased by 28%than that with pure Zn *** reason is that the Al element acts as a"reaction depressant"in filler metal,which contributes to inhibiting the dissolution of Mg base metal and the Mg-Zn *** addition of appropriate quantity of Al element promoted the precipitation of Al-rich solid solution instead of Zn solid *** MgZn_(2) IMCs have lower lattice mismatch with Al solid solution than Zn solid solution,thus the strength of joints is ***,the excessive addition of Al caused the formation of brittle Mg32(Al,Zn)49 ternary compounds,leading to the deterioration of joint performance.

关键词： Laser-TIG hybrid welding Mg-Al dissimilar joint Intermetallic compounds Microstructure Fracture

Rational catalyst design and interface engineering for electrochemical CO_(2) reduction to high-valued alcohols

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Journal of Energy Chemistry 2022年第7期31卷 310-331,I0009页

作者： Lingxi Zhou Ruitao lv State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China Key Laboratory of Advanced Materials(MOE) School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China

Electrochemical CO_(2) reduction(eCO_(2)RR) is an emerging strategy to address the global carbon balance issues and fulfill the carbon-neutral goal through converting CO_(2) to value-added chemicals/fuels driven by renewable energy sources. The production of highly reduced carbon compounds beyond CO and formate, especially oxygenate alcohol products with high energy densities and large global market capacities, is particularly desirable for practical applications. However, the building of alcohol-selective e CO_(2)RR electrocatalysis systems to overcome the high overpotential and poor durability remains a big ***, diverse strategies have been developed for rational catalyst design towards alcohol productions from e CO_(2)RR on the basis of the corresponding reaction mechanisms. In this review article, we firstly highlight recent advances in fundamental understanding of mechanisms in three electrochemical CO_(2)-alcohol reaction pathways. Then, the design strategies focused on catalyst and interface design are summarized for building alcohol-selective e CO_(2)RR electrocatalysis systems. The advanced characterization techniques are also discussed to provide more insights into e CO_(2) RR-to-alcohols processes. Finally, the remaining challenges and perspectives for promoting e CO_(2)RR to alcohols are proposed.

关键词： Electrochemical CO_(2)reduction reaction Alcohols Electrocatalysis Selectivity

Modeling the measurement precision of Fringe Projection Profilometry

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Light(Science & Applications) 2023年第11期12卷 2480-2497页

作者： Shenzhen lv Qian Kemao School of Computer Science and Engineering Nanyang Technological UniversitySingaporeSingapore

Three-dimensional(3D)surface geometry provides elemental information in various sciences and precision *** Projection Profilometry(FPP)is one of the most powerful non-contact(thus non-destructive)and non-interferometric(thus less restrictive)3D measurement techniques,featuring at its high ***,the measurement precision of FPP is currently evaluated experimentally,lacking a complete theoretical model for *** propose the first complete FPP precision model chain including four stage models(camera intensity,fringe intensity,phase and 3D geometry)and two transfer models(from fringe intensity to phase and from phase to 3D geometry).The most significant contributions include the adoption of a non-Gaussian camera noise model,which,for the first time,establishes the connection between camera’s electronics parameters(known in advance from the camera manufacturer)and the phase precision,and the formulation of the phase to geometry transfer,which makes the precision of the measured geometry representable in an explicit and concise *** a result,we not only establish the full precision model of the 3D geometry to characterize the performance of an FPP system that has already been set up,but also explore the expression of the highest possible precision limit to guide the error distribution of an FPP system that is yet to *** theoretical models make FPP a more designable technique to meet the challenges from various measurement demands concerning different object sizes from macro to micro and requiring different measurement precisions from a few millimeters to a few micrometers.

关键词： sizes concerning formulation