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9th International Symposium on Advances in Electrical, Electronics, and Computer Engineering, ISAEECE 2024

作者： Gu, Huaiguang Kou, Longze Gao, Yuqin Liu, Dong Liu, Dan Li, Linzhuo State Grid Smart Grid Research Institute Co. Ltd. Changping District Beijing102209 China State Key Laboratory of Advanced Power Transmission Technology Changping District Beijing102209 China Beijing Key Laboratory of DC Grid Technology and Simulation Changping District Beijing102209 China State Grid Hubei Electric Power Research Institute Hubei Wuhan430077 China North China Electric Power University Hebei Baoding071000 China

ISBN: (纸本)9781510683303

The power system model with power electronic equipment is usually a mechanism model, which needs to solve large-scale nonlinear differential algebraic equations. The solution process requires a large number of iterations, with a large amount of calculation. To address these issues in the mechanism model, a mechanism and data based modelling method based on artificial intelligence algorithms is proposed. This method replaces some complex mechanism models with data models, which can reduce the problem of requiring a large number of iterations for power electronic devices in the mechanism model. By controlling the sampling time, the accuracy control of the mechanism and data based model is achieved, finally, the mechanism and data based model of photovoltaic energy storage and transmission system is completed, improving the running speed. © 2024 SPIE ·

关键词： Data modeling Solar energy Modeling Photovoltaics Batteries Solar cells Electronic components

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Test and Analysis of Glare Effect of Incoherent Directional Beam

Test and Analysis of Glare Effect of Incoherent Directional ...

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2022 Applied Optics and Photonics China: Biomedical Optics, AOPC 2022

作者： Feng, Yun-Song Fan, Bin Xia, Jian-Ming Jin, Wei Wang, Jin Chen, You-Cai Key Laboratory of Infrared and Low Temperature Plasma of Anhui Province National University of Defense Technology Hefei230037 China Advanced Laser Technology Laboratory of Anhui Province Hefei230037 China State Key Laboratory of Pulsed Power Laser Technology National University of Defense Technology Hefei230037 China Army Equipment Division Aviation Military Representative Office Resident in Shanghai Shanghai200233 China The 38th Research Institute of China Electronics Technology Group Corporation Hefei230088 China

ISBN: (纸本)9781510662346

Usually, when there is no glare light source, the light reflected by the target is received by the human eye and then imaged on its retina. The observer can clearly see the target object, and the human eye can correctly judge the movement speed and direction of the target. However, when the glare light source exists, the glare light is scattered to form a light curtain, which is superimposed on the retina. If the scattered light is not too strong, it will not cause discomfort to the human eye, but it reduces the observer's perception of the target object. The visual sense reduces the contrast between the target object and the environment in the human eye, and reduces the human visual response speed. Incoherent directional beam glare interferes with the visual function of normal eyes through instantaneous strong light stimulation, causing temporary loss or decline of visual function, as well as image retention, discomfort, and avoidance responses such as blinking, closing eyes, and turning heads. Based on the mechanism of glare effect, the influencing factors of glare were analyzed, and the influence of incoherent directional beams on human vision was studied from the aspects of light source brightness, irradiation time, flicker frequency, etc. The research results provide data support for the design and use of incoherent glare weapons, and lay the foundation for the application of incoherent directional beam glare weapons in public security fields such as border defense and denial, maritime expulsion, and anti-terrorism and stability maintenance. © 2023 SPIE.

关键词： Light sources

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Long-time evolution of charged grains in plasma under harmonic external force and after being withdrawn

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Chinese Physics B 2022年第2期31卷 460-464页

作者： Miao Guan Zhi-Dong Chen Meng-Die Li Zhong-Mao Liu You-Mei Wang Ming-Yang Yu Department of Physics School of ScienceHangzhou Dianzi UniversityHangzhou 310016China College of Engineering Physics CAMDTShenzhen Key Laboratory of Ultraintense Laser and Advanced Material TechnologyShenzhen Technology UniversityShenzhen 518118China Institute for Fusion Theory and Simulation Zhejiang UniversityHangzhou 310007China Theoretical Physics I Ruhr UniversityBochum D-44780Germany

Evolution of the charged grains in a two-dimensional dusty plasma under a spatially harmonic external force,in particular,their long-time behaviors after the force has been withdrawn,is studied by using molecular dynamics *** an external force and a grain–grain interaction force,initially homogeneously distributed grains can reach a quasistationary state in the form of a disk *** the external force is withdrawn,the disk moves initially with its size and shape nearly unchanged until it rapidly stops moving,and eventually the disk grain rotates like a *** time needed to reach the final state increases with the strength of the initial external force increasing.

关键词： dusty plasma external force long-time behavior molecular dynamics(MD)simulation

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Development of a Method to Determine the Environmental Burden of Diseases and an Application to Identify Factors Driving Changes in the Number of PM_(2.5)-Related Deaths in China between 2000 and 2010

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Environment & Health 2024年第9期2卷 642-650页

作者： Ning Kang Pengfei Li Tao Xue Tong Zhu Institute of Reproductive and Child Health National Health Commission Key Laboratory of Reproductive Health/Department of Epidemiology and BiostatisticsMinistry of Education Key Laboratory of Epidemiology of Major Diseases(PKU)School of Public HealthPeking University Health Science CenterBeijing 100191China Institute of Medical Technology Peking University Health Science CenterBeijing 100191China Advanced Institute of Information Technology Peking UniversityHangzhou 311215China State Environmental Protection Key Laboratory of Atmospheric Exposure and Health Risk Management and Center for Environment and HealthPeking UniversityBeijing 100871China State Environmental Protection Key Laboratory of Atmospheric Exposure and Health Risk Management and Center for Environment and Health and State Key Joint Laboratory of Environment Simulation and Pollution ControlCollege of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China

The attributable burden is codetermined by the exposure level and nontarget ***,the conventional method of health impact assessment based on preestablished exposure−response functions includes only a few well-known characteristics and thus is insufficient to capture the comprehensive *** aimed to develop a method to fuse health impact assessment with epidemiological analysis and to identify factors driving baseline *** method was applied to identify the factors underlying the change in the number of fine particulate matter(PM_(2.5))related deaths in China between 2000 and *** the study period,the number of PM_(2.5)-related deaths across China's Mainland increased by 0.62(95%CI:0.57,0.69)million,with 0.65(95%CI:0.47,0.91)million,0.55(95%CI:0.39,0.79)million,and 0.11(95%CI:0.06,0.18)million deaths being associated with increased PM_(2.5)exposure,population aging,and growth in population size,***,economic growth,urbanization,improvement of welfare services,and improvement of hospital services resulted in 0.25(95%CI:0.15,0.40)million,0.16(95%CI:0.10,0.27)million,0.16(95%CI:0.09,0.26)million,and 0.09(95%CI:0.05,0.15)million fewer deaths,*** indicated that increased exposure was the major driver of the change in the number of PM_(2.5)-related deaths,and economic growth was the main driver of increased resilience to air pollution.

关键词： health burden decomposition analysis air pollution fine particulate matter premature deaths

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Self-Supervised Entity Alignment Based on Multi-Modal Contrastive Learning

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IEEE/CAA Journal of Automatica Sinica 2022年第11期9卷 2031-2033页

作者： Bo Liu Ruoyi Song Yuejia Xiang Junbo Du Weijian Ruan Jinhui Hu the School of Software Engineering Xi’an Jiaotong UniversityXi’an 710000 the China Electronics Technology Group Corporation(CETC)Key Laboratory of Smart City Model Simulation and Intelligent Technology the Smart City Research Institute of CETC and National Center for Applied Mathematics Shenzhen(NCAMS)Shenzhen 518000China the Chinese University of Hong Kong Shenzhen 518000China Tencent Shenzhen 518000China the CETC Key Laboratory of Smart City Model Simulation and Intelligent Technology the Smart City Research Institute of CETC and National Center for Applied Mathematics Shenzhen(NCAMS)Shenzhen 518000China the Shenzhen Institute of Advanced Technology Chinese Academy of SciencesShenzhen 518055

Dear Editor,This letter proposes an unsupervised entity alignment method,which realizes integration of multiple multi-modal knowledge graphs *** recent years,Large-scale multi-modal knowledge graphs(LMKGs),containing text and image,have been widely applied in numerous knowledge-driven topics,such as question answering,entity linking,information extraction,reasoning and recommendation.

关键词： modal linking letter

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Temperature Field Analysis and Optimal Design of Axial Flux Permanent Magnet Motor Based on Fluid-Solid Coupling

Temperature Field Analysis and Optimal Design of Axial Flux ...

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IEEE International Conference on Power and Power and Renewable Energy (ICPRE)

作者： Haoyu Kang Yiming Song Jin Wang Libing Zhou State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China AECC Hunan Aviation Powerplant Research Institute Zhuzhou China

ISBN: (数字)9798350377460

ISBN: (纸本)9798350377477

With its compact spatial structure and high power density, the axial flux permanent magnet motor is suitable for specialized applications but also imposes higher cooling requirements. It necessitates a well-designed rotor cooling structure to ensure reliable motor operation. This paper uses a 7kW dual-stator single-rotor axial flux permanent magnet motor as an example. Based on the principle of fluid-solid coupling, the motor's three-dimensional fluid field and temperature field models are established to study the impact of different rotor structures on the motor's heat dissipation capability. The research results indicate that the permanent magnets exhibit the highest temperature rise in a dual-stator single-rotor axial flux permanent magnet motor. By more effectively agitating the air around the permanent magnets and increasing the heat dissipation area of the permanent magnets, the motor's cooling capacity can be improved. Specifically, thinning the rotor support structure can effectively suppress the temperature rise of the permanent magnets.

关键词： Heating systems Couplings Solid modeling Temperature distribution Fluids Cooling Rotors Permanent magnet motors Permanent magnets Stress

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Control Strategy of Direct-Driven PMSM Wind Turbines Participating in Fast Frequency Response of Power Grid 6

Control Strategy of Direct-Driven PMSM Wind Turbines Partici...

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6th International Conference on Energy, Electrical and Power Engineering, CEEPE 2023

作者： Yan, Heming Ji, Feng Pang, Hui Jia, Wenxuan Lin, Chang Pei, Xiangyu State Grid Smart Grid Research Institute Co. Ltd. State Key Laboratory of Advanced Power Transmission Technology Beijing China The College of Electrical and Electronic Engineering North China Electric Power University Beijing China State Grid Smart Grid Research Institute Co. Ltd. Beijing Key Laboratory of DC Grid Technology and Simulation Beijing China

ISBN: (纸本)9798350348279

The large-scale grid connection of wind power brings challenges to the frequency stability of the power system, the system inertia decreases, the frequency regulation capability deteriorates, and the traditional wind turbine is difficult to meet the frequency regulation demand of the system. To address the problem of slow response of existing wind turbines participating in frequency regulation, this paper proposes a control method for permanent magnet direct-driven wind turbines participating in fast frequency response of the grid, based on power electronic converters equipped with electromagnetic level control speed to rapidly change the electromagnetic torque of the wind turbine rotor according to the system frequency change, increase or decrease the wind turbine speed to fully utilize the stored or released rotational inertia and achieve fast power regulation of the wind turbine. The results of the frequency step simulation of the permanent magnet direct-driven synchronous wind power system show that the fast frequency regulation response time of the control method proposed in this paper can reach the millisecond level. © 2023 IEEE.

关键词： Frequency response

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Influence of damping ring on the aeroelastic stability of labyrinth seal

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Hangkong Dongli Xuebao/Journal of Aerospace Power 2025年第6期40卷

作者： Li, Yu Liu, Haibo Sun, Dan Yang, Zemin Su, Guozheng Xu, Meipeng Key Laboratory of Advanced Measurement and Test Technology for Aviation Propulsion System School of Aero-engine Shenyang Aerospace University Liaoning Province Shenyang110136 China Key Laboratory of Turbomachinery Advanced Seal Technology Shenyang Shenyang Aerospace University Shenyang110136 China Commercial Aircraft Engine Company Limited Aero Engine Corporation of China Shanghai200241 China

Considering the aeroelastic instability problem of the labyrinth seal of aeroengine, a model for solving the damped vibration reduction of labyrinth seal was established. Based on the energy method, the influences of the structure parameters of the damping ring and its installation position on the aeroelastic stability of the labyrinth seal were studied, and the mechanism of the influence of the damping ring on the aeroelastic stability of the labyrinth seal was revealed. The results showed that the aerodynamic damping ratio of the first mode and second mode was −0.41% and −0.049%, respectively, without the damper ring, which resulted in aeroelastic instability. However after installation of the damping ring, the aerodynamic damping ratio of the second mode changed from negative to positive, and aerodynamic damping ratio of the first mode was still negative, but the damping ratio value increased, the damping ring improved the aeroelastic stability of the labyrinth seal. When the installation interference of the damping ring was larger, the opening amount was smaller, moreover, when the aerodynamic damping ratio of the labyrinth seal was larger, the aeroelastic stability was better. When the damping ring was installed at the cantilever end, the aerodynamic damping ratio was the largest, meantime the labyrinth seal was the most stable. When the damping ring was installed at the wave node, the aerodynamic damping ratio and the amplitude reduction ratio were the smallest, and then the labyrinth seal stability was poor. © 2025 Beijing University of Aeronautics and Astronautics (BUAA). All rights reserved.

关键词： Damping

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Knowledge-driven material design platform based on the whole-process simulation and modeling

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International Journal of Modeling, simulation, and Scientific Computing 2022年第2期13卷 1-15页

作者： Gongzhuang Peng Tie Li Xiang Zhai Wenzheng Liu Heming Zhang National Engineering Research Center for Advanced Rolling Technology University of Science and Technology Beijing Beijing 100083 P.R.China Shanghai Electro-Mechanical Engineering Institute Shanghai 201109 P.R.China State Key Laboratory of Intelligent Manufacturing System Technology Beijing Institute of Electronic System Engineering Beijing 100854 P.R.China Beijing Complex Product Advanced Manufacturing Engineering Research Center Beijing Simulation Center Beijing 100854P.R.China Science and Technology on Space System Simulation Laboratory Beijing Simulation Center Beijing 100854P.R.China National CIMS Engineering Research Center Tsinghua University Beijing 100084P.R.China

In order to realize the agility,collaboration and visualization of alloy material devel-opment process,a product development platform based on simulation and modeling technologies is established in this *** this platform,the whole-process simulation module builds multi-level simulation models based on metallurgical mechanisms from the production line level,the thermo-mechanical coupling field level and the microstructure evolution *** design knowledge management module represents the multi-source heterogeneous material design knowledge through ontology model,including customers’requirement knowledge,material component knowledge,process design knowledge and quality inspection knowledge,and utilizes the case-based reasoning approach to reuse the *** data-driven modeling module applies machine learning algorithms to mine the relationships between product mechanical properties,material components,and process parameters from historical samples,and utilizes multi-objective optimiza-tion algorithms to find the optimal combination of process *** of the developed platform in actual steel mills shows that the proposed method helps to improve the efficiency of product design process.

关键词： Product development knowledge-based engineering multi-scale simulation performance prediction model

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Advances in Metal Halide Perovskite Scintillators for X-Ray Detection

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Nano-Micro Letters 2025年第1期17卷 1-38页

作者： Wang, Ting Zeng, Guoqiang Yang, Yang Michael Yang, Zhi Wang, Tianchi Li, Hao Han, Lulu Yu, Xue Xu, Xuhui Ouyang, Xiaoping College of Materials and Chemistry & Chemical Engineering Nuclear Technology Key Laboratory of Earth Science Chengdu University of Technology Chengdu610059 China State Key Laboratory of Intense Pulsed Radiation Simulation and Effect Northwest Institute of Nuclear Technology Xi’an710024 China Nuclear Technology Key Laboratory of Earth Science Chengdu University of Technology Chengdu610059 China Faculty of Materials Science and Engineering Key Laboratory of Advanced Materials of Yunnan Province Kunming University of Science and Technology Kunming650093 China Key Laboratory of Materials Physics of Ministry of Education Laboratory of Zhongyuan Light School of Physics Zhengzhou University Zhengzhou450051 China State Key Laboratory of Modern Optical Instrumentation Institute for Advanced Photonics College of Optical Science and Engineering Zhejiang University Hangzhou310027 China School of Mechanical Engineering Institute for Advanced Materials Chengdu University Chengdu610106 China

The review highlights recent advancements in enhancing the intrinsic physical properties of metal halide perovskite scintillators, such as improving light yield and response times, to improve their X-ray detection performance. It discusses innovative engineering strategies to effectively optimize radioluminescent light management for high-resolution X-ray imaging. The problems encountered in the application of metal halides perovskites materials for X-ray detection are summarized, and the potential development direction in the future is prospected. © The Author(s) 2025.

关键词： Scintillation counters

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