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Artificial Intelligence and Intelligent Manufacturing (AIIM), International Symposium on

作者： Lei Tang Yifei Tang Junhao Zhang Mengjuan Liu Science and Technology on Reactor System Design Technology Laboratory Nuclear Power Institute of China Chengdu China School of Information and Software Engineering University of Electronic Science and Technology of China Chengdu China Glasgow College University of Electronic Science and Technology of China Chengdu China

ISBN: (数字)9798331541729

ISBN: (纸本)9798331541736

With the rapid advancement of artificial intelligence technology, the development of intelligent manufacturing has become an inevitable trend. Utilizing AI technology to ensure the safe operation of factories is a crucial aspect of smart factories. In particular, research focused on fault diagnosis and remaining useful life (RUL) prediction models based on machine learning has garnered significant attention from both academia and industry. This paper explores RUL prediction models for complex equipment, introduces four representative models, and analyzes their performance using two benchmark datasets, C-MAPSS and N-CMAPSS. Finally, the paper discusses the future research and application trends of artificial intelligence technology in complex equipment operation and maintenance.

关键词： Fault diagnosis Training Analytical models Machine learning Predictive models Market research Production facilities Maintenance Monitoring Smart manufacturing

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Study on hydrogen stratification and erosion process in Chinese SMR containment under severe accident scenario

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International Journal of Advanced Nuclear reactor design and technology 2020年 2卷 43-51页

作者： Fan, Yang Songwei, Li Wei, Zeng Zhifang, Qiu Jian, Deng Science and Technology on Reactor System Design Technology Laboratory NPIC China Design and Research Sub-institute NPIC China

During postulated severe accident, large amount of hydrogen-vapor mixture will be released into the containment and inflammable gas mixture may form. Once the gas will be ignited, the generated pressure loads can jeopardize the integrity of the internal structures. As the local accumulation of high content hydrogen related much to the stratification and erosion mechanism, it is therefore of interest whether a stratification of gas layers will form within small containment. In this study, a stratification/erosion experiment is performed and the criteria under which the steady stratification will be destroyed by steam jet discussed. Then the simulation method is validated by the experimental data. At last, several severe accident scenarios for Chinese SMR performed and one of them is adopted for containment hydrogen CFD analysis. It is shown that high content of hydrogen will form in the upper part of the containment, and clear gas stratification will form, such stratification will be enhanced due to the condensation effect of steel containment wall. © 2020

关键词： Hydrogen

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Ship model self-propulsion instrument development and test verification 8

Ship model self-propulsion instrument development and test v...

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2024 8th International Conference on Hydrodynamics, Energy and Electric Power System, HEEPS 2024

作者： Wu, Yongshun Ma, Qiang Xu, Wenjun Xia, Wenjing Yang, Sujun Marine Design & Research Institute of China Shanghai200011 China Shanghai Key Laboratory of Ship Engineering Shanghai200011 China China Institute of Marine Technology & Economy Beijing100081 China Laboratory of Science and Technology on Water Jet Propulsion Shanghai200011 China

Aimed at the characteristics of high precision requirements and large environmental changes of the thrust and torque coupling test in the self-propulsion test of the ship model, the paper carries out the design of the instrument of the ship model test, the calculation of structural strength, the design of anti-jamming of the thrust and torque coupling, and the selection and realization of thrust and torque module. Based on the above, the instrument was calibrated with sensitivity coefficient, high and low temperature, and dynamic stability tests. Besides this, a self-propulsion test at the design speed point of a ship was carried out to verify the accuracy and environmental adaptability. From the static calibration result, the coefficient of determination is 1.0. The max zero drift of thrust and torque is 0.11% FS and 0.05% FS respectively from the low-high temperature test, and the max zero drift of torque under different revolutions is 0.23% FS from the dynamic test. In addition to the above, the max deviation between Maric-SP01 and R31 of thrust and torque is less than 0.78% and 0.65% respectively from the ship model self-propulsion test. So, in one word, the instrument has good reliability and accuracy and can meet the requirements of the ship model self-propulsion test. © Published under licence by IOP Publishing Ltd.

关键词： Low temperature testing

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Fifth-Order A-WENO Path-Conservative Central-Upwind Scheme for Behavioral Non-Equilibrium Traffic Models

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Communications in Computational Physics 2023年第3期33卷 692-732页

作者： Shaoshuai Chu Alexander Kurganov Saeed Mohammadian Zuduo Zheng Department of Mathematics Southern University of Science and TechnologyShenzhen518055P.R.China Shenzhen International Center for Mathematics and Guangdong Provincial Key Laboratory of Computational Science and Material Design Southern University of Science and TechnologyShenzhen518055P.R.China School of Civil Engineering the University of QueenslandBrisbane Qld4072Australia.

Non-equilibrium hyperbolic traffic models can be derived as continuum approximations of car-following models and in many cases the resulting continuum models are *** leads to numerical difficulties,which seem to have discouraged further development of complex behavioral continuum models,which is a significant research *** this paper,we develop a robust numerical scheme that solves hyperbolic traffic flow models based on their non-conservative *** develop a fifth-order alternative weighted essentially non-oscillatory(A-WENO)finite-difference scheme based on the path-conservative central-upwind(PCCU)method for several non-equilibrium traffic flow *** order to treat the non-conservative product terms,we use a path-conservative *** this end,we first apply the recently proposed secondorder finite-volume PCCU scheme to the traffic flow models,and then extend this scheme to the fifth-order of accuracy via the finite-difference A-WENO *** designed schemes are applied to three different traffic flow models and tested on a number of challenging numerical *** schemes produce quite accurate results though the resolution achieved by the fifth-order A-WENO scheme is *** proposed scheme in this paper sets the stage for developing more robust and complex continuum traffic flow models with respect to human psychological factors.

关键词： Finite-difference A-WENO schemes finite-volume central-upwind schemes pathconservative central-upwind schemes non-oscillatory schemes continuum traffic flow model driver behavior.

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Mechanical properties of Ti_(3)AlC_(2)ceramics before and after heat treatment

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Rare Metals 2022年第8期41卷 2777-2782页

作者： Lei Yao Chun-Cheng Zhu Jiu-Xing Jiang Bai-Bin Zhou Key Laboratory of Design and Synthesis of Functional Materials and Green Catalysis Harbin Normal UniversityHarbin150025China College of Applied Sciences Harbin University of Science and TechnologyHarbin150080China

Ti_(3)AIC_(2)ceramics were heat treated at the temperature from 1050 to 1450℃.Vickers hardness,fracture toughness,flexural strength and compressive strength of Ti_(3)AlC_(2)were tested and calculated before and after heat treatment,***_(3)AIC_(2)content,fracture toughness,flexural strength and compressive strength of Ti_(3)AIC_(2)first increase and then decrease,while Vickers hardness is just the opposite with the increase in temperature from 1050 to 1450℃*** heat treatment at1250℃,Ti_(3)AIC_(2)content reaches the highest level of94.2 wt%,and fracture toughness,flexural strength and compressive strength reach the maximum values,which are6.4 MPa·m^(1/2),318 MPa and 662 MPa,*** hardness reduces to the lowest value of 2.9 *** treatment does improve the strength and Ti_(3)AlC_(2)content,but reduces the hardness and optimizes the mechanical properties of Ti_(3)AlC_(2).

关键词： Ti_(3)AlC_(2) Heat treatment Mechanical properties

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In situ silver clusters decorated Bi_(24)O_(31)Cl_(10)nanorods for boosting photo-thermal catalytic activities

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Journal of Materials science & technology 2024年第23期190卷 236-247页

作者： Yunxiang Zhang Yu Wang Chenliang Zhou Hazem Abdelsalam Wei Chen Li Huang Zhichao Mu Zhili Chen Diab Khalafallah Qinfang Zhang School of Materials Science and Engineering Yancheng Institute of TechnologyYancheng 224051China Key Laboratory for Ecological-Environment Materials of Jiangsu Province Yancheng Institute of TechnologyYancheng 224051China Theoretical Physics Department National Research CentreEl-Buhouth Str.12622DokkiGizaEgypt Mechanical Design and Materials Department Faculty of Energy EngineeringAswan UniversityP.O.Box 81521AswanEgypt

High photogenerated carrier recombination rate and weak spectral response are the two main factors restricting photocatalytic activities of *** this work,a novel Ag/Bi_(24)O_(31)Cl_(10)heterojunction has been developed by the in-situ photoreduction technique to address the preceding ***-chemical properties of as-synthesized 0.7 wt%Ag/Bi_(24)O_(31)Cl_(10)photocatalysts were investigated in *** Ag clusters can be seen as surface plasmon polaritons to light absorption capacity and photothermal effect,which was demonstrated via Raman and UV-Vis diffuse reflectance spectra(UV-Vis DRS).Den-sity functional theory(DFT)calculations show that the additional unoccupied crystal orbital by the silver(Ag)will accelerate the charge separation where some of the excited electrons to the conduction band of Bi_(24)O_(31)Cl_(10)will drift to these orbitals which in turn prevent charge ***,Ag metal cluster-decorated Bi_(24)O_(31)Cl_(10)photocatalysts can be identified as electron trappers to boost the spatial separation of the photogenerated carrier,and finally,the CH 4 generation rate and the rhodamine b(RhB)degraded efficiency of Ag/Bi_(24)O_(31)Cl_(10)photocatalysts are enhanced about 1.54 and 5.20 times,*** Ag/Bi_(24)O_(31)Cl_(10)composite photocatalyst retained high photocatalytic activities after four cycles indi-cating the stability and repeatability of the Ag/Bi_(24)O_(31)Cl_(10)*** work aims to provide new insight into modifying ideal semiconductor materials for high photocatalytic activity.

关键词： Photocatalyst Bi_(24)O_(31)Cl_(10) Ag clusters Surface plasmon polariton Electron trapper

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Deformable micro-supercapacitor fabricated via laser ablation patterning of Graphene/liquid metal

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npj Flexible Electronics 2024年第1期8卷 770-778页

作者： Keon-Woo Kim Seong Ju Park Su-Jeong Park Inae Kim Bomi Park Se Hyun Kim Unyong Jeong Jin Kon Kim Chanwoo Yang National Creative Research Initiative Center for Hybrid Nano Materials by High-level Architectural Design of Block Copolymer Department of Chemical EngineeringPohang University of Science and Technology(POSTECH)PohangGyeongbuk 37763Republic of Korea Advanced Nano-Surface&Wearable Electronics Research Laboratory Heat and Surface Technology R&D DepartmentKorea Institute of Industrial TechnologyIncheon 21999Republic of Korea Division of Chemical Engineering Konkuk UniversitySeoul 05029Republic of Korea Department of Materials Science and Engineering Pohang University of Science and Technology(POSTECH)PohangGyeongbuk 37763Republic of Korea

Deformable andminiaturized energy storage devices are essential for powering soft ***,we fabricate deformablemicro supercapacitors(MSCs)based on eutectic gallium-indium liquidmetal(EGaIn)current collectors with integrated *** well-define interdigitated electrode patterning with controlled gap is successfully realized by using the laser ablation because of a strong laser absorption of graphene and *** judicious control of gap size between neighboring interdigitated electrodes and mass loading of graphene,we achieve a high areal capacitance(1336μF cm^(−2))with reliable rate *** addition,owing to the intrinsic liquid characteristics of EGaIn current collector,the areal capacitance of fabricated MSC retains 90% of original value evenafter repetitive foldingand20%stretching up to 1000 ***,we successfully integrate deformable MSC with a commercial light-emitting diode to demonstrate the feasibility ofMSC as a deformable power *** fabricated MSCs operate stably under various mechanical deformations,including stretching,folding,twisting,and wrinkling.

关键词： laser stretching liquid

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APPLICATION OF THE METHOD OF MANUFACTURED SOLUTIONS TO VERIFY A NUCLEAR reactor PHYSICS COMPUTATIONAL CODE USING THE METHOD OF CHARACTERISTICS 30

APPLICATION OF THE METHOD OF MANUFACTURED SOLUTIONS TO VERIF...

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30th International Conference on Nuclear Engineering, ICONE 2023

作者： Ge, Wenjia Wen, Peizheng Li, Zhuofan Luo, Qi Zhao, Chen Wang, Jipu Yang, Ming Institute for Advanced Study in Nuclear Energy & Safety College of Physics and Optoelectronic Engineering Shenzhen University Shenzhen518060 China Nuclear Reactor System Design Technology Key Laboratory China Nuclear Power Research and Design Institute Chendu China

ISBN: (纸本)9784888982566

The method of characteristics (MoC) has become an accepted tool for lattice physics calculations. MoC has many advantages such as accurate representations of both the lattice geometry and the boundary conditions. The flat source (FS) approximation is most commonly used, and the linear source (LS) approximation can improve the accuracy by preserving higher order spatial moments of the neutron source. However, as a non-standard spatial discretization method, the order of accuracy of the spatial discretization is more difficult to obtain, especially for analyzing linear source approximation, because the MoC method utilizes two sets of spatial meshes - the FS mesh and the set of characteristic rays that integrate the transport equation over the FS mesh. In this work, we analyze the order of accuracy with spatial resolution in MoC in planar geometry for both FS and LS approximations and verify our predictions with the Method of Manufactured Solutions (MMS). It is shown that the flat source approximation is second order accurate and that the linear source approximation has a fourth order accuracy. © 2023 by JSME.

关键词： Nuclear reactors

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Influence of unstable working conditions on friction torque of angular contact ball bearings 6

Influence of unstable working conditions on friction torque ...

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2023 6th World Conference on Mechanical Engineering and Intelligent Manufacturing, WCMEIM 2023

作者： Zhang, Ruoyu Yu, Yongjian Li, Jishun Xue, Yujun School of Mechatronics Engineering Henan University of Science and Technology Henan Luoyang China Henan Key Laboratory for Machinery Design and Transmission System Henan Luoyang China Longmen Laboratory Henan Luoyang China

The influence of rolling element material on friction torque of angular contact ball bearing under variable speed, variable load, and variable load conditions are studied. Based on the unstable working conditions of variable speed and load, the dynamic model of bearing is established by using CMD language in the ADAMS system, and the simulation analysis is carried out. The results show that under variable speed conditions, the shorter the acceleration time is, the greater the radial and axial loads are, and the greater the friction torque of the bearing is;Under variable load conditions, the friction torque of the bearing increases with the increase of load change frequency, and the friction torque of the hybrid ceramic ball bearing is smaller than that of the GCr15 rolling element bearing. The research results provide a reference for reducing the friction heat generation of bearings and improving the operation reliability of bearings under unstable working conditions. © Published under licence by IOP Publishing Ltd.

关键词： Angular contact ball bearings

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Achieving high strength and large ductility in a Cr30Co30Ni30Al5Ti5 alloy through intergranular precipitation

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Journal of Materials science and technology 2025年第12期215卷 167-179页

作者： Zou, Jiawei Chen, Siyu Cheng, Pengming Ding, Jun Zhang, Chongle Zhang, Shengze Zhang, Bozhao Fu, Xiaoqian Chen, Yujie Zhao, Yuping Qi, Xu Gu, Lin Zhang, Ze Sha, Gang Yu, Qian Center of Electron Microscopy and State Key Laboratory of Silicon and Advanced Semiconductor Materials School of Materials Science and Engineering Zhejiang University Hangzhou310027 China School of Materials Science and Engineering Herbert Gleiter Institute of Nanoscience Nanjing University of Science and Technology Nanjing210094 China State Key Laboratory for Mechanical Behavior of Materials School of Materials Science and Engineering Xi'an Jiaotong University Xi'an710049 China Center for Alloy Innovation and Design State Key Laboratory for Mechanical Xi'an Jiaotong University Xi'an710049 China Pico Electron Microscopy Center Innovation Institute for Ocean Materials Characterization Technology Center for Advanced Studies in Precision Instruments Hainan University Haikou570228 China Beijing National Center for Electron Microscopy and Laboratory of Advanced Materials School of Materials Science and Engineering Tsinghua University Beijing100084 China

Precipitation at grain boundaries is typically not regarded as an efficient method for strengthening materials since it can induce grain boundary embrittlement, which detrimentally affects ductility. In this research, we developed a multi-principal element alloy (MPEA) with the composition Cr30Co30Ni30Al5Ti5 (at.%), incorporating both intragranular and intergranular nanoprecipitates. Utilizing multiscale, three-dimensional, and in-situ electron microscopy techniques, coupled with computational simulations, we established that intergranular nanoprecipitation in this material plays a crucial role in enhancing strength and promoting dislocation plasticity. The structure of intergranular nanoprecipitation comprises multiple phases with varying composition and structure. Despite the diversity, the crystal planes conducive to the easy glide of dislocations are well-matched, allowing for the sustained continuity of dislocation slipping across different phase structures. Simultaneously, this structure generates an undulated stress field near grain boundaries, amplifying the strengthening effect and facilitating multiple slip and cross-slip during deformation. Consequently, it promotes the proliferation and storage of dislocations. As a result, our material exhibits a yield strength of approximately 1010 MPa and an ultimate tensile strength of around 1500 MPa, accompanied by a significant fracture elongation of 41 %. Our findings illuminate the potential for harnessing intergranular nanoprecipitation to optimize the strength-ductility trade-off in MPEAs, emphasizing the strategy of leveraging complex compositions for the design of sophisticated functional microstructures. © 2024

关键词： Ductility

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