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Analysis of electromagnetic Performance of an AUV Wireless Charge Device with New Coil Structure 1

18th Annual Conference of China Electrotechnical Society, ACCES 2023

作者： Liu, Longjian Zhang, Ming Rao, Bo Liu, Zhijian Guo, Cheng Yu, Zhongming Faculty of Electric Power Engineering Kunming University of Science and Technology Kunming650500 China State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan430074 China

ISBN: (数字)9789819713516

ISBN: (纸本)9789819713509

This paper proposed a an AUV Wireless Charge Device With New Coil Structure, including transmitting coil, receiving coil, and the magnetic core used for magnetic field shielding. The transmitting coil is arc-shaped coil, with 60° radian, and it is arranged by six identical coils along the circumference, and the identical coils are connected in series. The receiving coil is also arc-shaped coil, with 120° radian, and it is arranged by three identical coils along the circumference, and the identical coils are connected in series or parallel. The new-structure coil has the advantage that the inductances of transmitting coil and receiving coil is almost constant, and it is especially suitable for AUV wireless charging devices. And it can solve the problem of the coupling coefficient of traditional AUV wireless charging devices changing with the AUV roll angle. © Beijing Paike Culture Commu. Co., Ltd. 2024.

关键词： Inductance

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High-precision numerical modeling of the pro jectile launch and failure mechanism analysis of pro jectile-borne components

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Applied Mathematics and Mechanics(English Edition) 2025年第5期46卷 885-906页

作者： Xindan GUO Qiming LIU Xu HAN Tao LI Bin’an JIANG Canwei CAI State Key Laboratory of Advanced Design and Manufacturing Technology for Vehicle College of Mechanical and Vehicle EngineeringHunan UniversityChangsha 410082China State Key Laboratory of Reliability and Intelligence of Electrical Equipment School of Mechanical EngineeringHebei University of TechnologyTianjin 300401China Artillery Ammunition Technology Laboratory PLA Army Academy of Artillery and Air DefenseHefei 230031China

As core components of precision-guided projectiles,projectile-borne components are highly susceptible to failure or even damage in complex high-overload environments,thereby significantly compromising launch reliability and ***,accurately characterizing the mechanical behavior of propellants remains challenging due to the limitations in the current internal ballistic theory and the constraints of large-scale artillery firing *** complicates the high-precision numerical modeling of projectile launch,and obstructs investigations into the failure mechanisms of projectile-borne ***,this paper identifies propellant parameters using the computational inverse method under uncertainty,further establishes high-precision numerical models of projectile launch,and explores the failure mechanisms of projectile-borne components in complex high-overload ***,a projectile launching experiment is meticulously designed and executed to obtain the breech pressure and muzzle ***,a general simulation model is built,and the powder burn model is used to simulate the ignition and ***,the propellant parameters are effectively identified with the computational inverse method by the combination of the experiments and simulations.A high-precision numerical model of projectile launch is modified with the parameters validated by another experiment,and the high-overload characteristics during projectile launch are thoroughly analyzed based on this ***,the high-overload characteristics of projectile-borne components are analyzed to elucidate the stress variation laws and to reveal the failure mechanisms influenced by time and spatial *** research provides an effective method for perfectly identifying propellant parameters and building high-precision numerical models of projectile ***,it provides significant guidance for the anti-high overload design and analysis of projectile-bo

关键词： projectile-borne component high-overload environment propellant parameter identification computational inverse technique failure mechanism

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High thermoelectric performance of flexible Ag/Ag_(2)Se composite film on nylon for low-grade energy harvesting

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Journal of Materials Science & technology 2024年第12期179卷 79-85页

作者： Ying Liu Jiajia Li Zixing Wang Ping Wei Wenyu Zhao Lidong Chen Kefeng Cai Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education Shanghai Key Laboratory of Development and Application for Metal-Functional MaterialsSchool of Materials Science&EngineeringTongji UniversityShanghai 201804China State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

In this work,Ag/Ag_(2)Se composite films with excellent thermoelectric(TE)properties and flexibility are prepared based on a simple one-pot *** adjusting the nominal ratios of Ag/Se,an optimal Ag/Ag_(2)Se composite film shows a large power factor of~2275 μW m^(-1) K^(-2) at 300 *** an outstand-ing TE performance of the composite film is due to the unique microstructure and the synergistic effect between the Ag and Ag_(2)***,the composite film also shows outstanding flexibility(~91.8%of the initial electrical conductivity is maintained,and the S is unchanged after 1500 bending cycles with a bending radius of 4 mm).Furthermore,a 4-leg flexible TE generator assembled with the optimal film produces a voltage of 14.06 mV and 4.96 μW at a temperature difference of 30.4 *** work provides a new inspiration for the preparation of flexible Ag_(2)Se-based films with excellent TE performance near room temperature.

关键词： Thermoelectric Ag/Ag_(2)Se Flexible Film Power generator

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Coordinated Optimization of Multi-energy Generation Systems Considering the Health Damages of Coal-fired Pollutant Dispersion

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CSEE Journal of Power and Energy Systems 2022年第6期8卷 1613-1622页

作者： Suhua Lou Yinhao Yang Yanjie Liang Yaowu Wu State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and TechnologyWuhan 430074China Power Dispatch and Control Center of China Southern Power Grid Guangzhou 510623China

Pollutants emitted from coal-fired power plants lead to the deterioration of air quality in developing countries,and contribute to both mortality and *** improve air quality from power generation,new dispatch strategies incorporated with air pollution dispersion models should be *** paper takes into account the impact of meteorological variations on spatio-temporal dispersion of *** on the coal-fired pollutant concentration estimated by the Gaussian plume dispersion model,exposure-response functions are used to quantify the resulting health ***,the corresponding economic costs of health damages are incorporated to penalize the power *** generation costs and economic costs of health damages,this paper formulates a twostage stochastic optimization model of a multi-energy generation system including coal units,gas units,and photovoltaic ***,numerical studies based on a modified IEEE 14-node system are performed for illustration and validation.

关键词： Coal-fired pollutant dispersion exposure-response functions Gaussian plume model meteorological variations multi-energy generation system

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The application of metal-organic frameworks and their derivatives for lithium-ion capacitors

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新型炭材料（中英文） 2024年第5期39卷 872-895页

作者： ZHAO Sha-sha ZHANG Xiong LI Chen AN Ya-bin HU Tao WANG Kai SUN Xian-zhong MA Yan-wei Key Laboratory of High Density Electromagnetic Power and Systems(Chinese Academy of Sciences) Institute of Electrical EngineeringChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Shandong Key Laboratory of Advanced Electromagnetic Conversion Technology Institute of Electrical Engineering and Advanced Electromagnetic Drive TechnologyQilu ZhongkeJinan 250013China

There is an urgent need for lithium-ion capacitors(LICs)that have both high energy and high power densities to meet the continuously growing energy storage *** effectively balance the high energy density of traditional rechargeable batteries with the superior power density and long life of supercapacitors(SCs).Nevertheless,the development of LICs is still hampered by limited kinetic processes and capacity mismatch between the cathode and ***-organic frameworks(MOFs)and their derivatives have received significant attention because of their extensive specific surface area,different pore structures and topologies,and customizable functional sites,making them compelling candidate materials for achieving high-performance ***-derived carbons,known for their exceptional electronic conductivity and large surface area,provide improved charge storage and rapid ion ***-derived transition metal oxides contribute to high specific capacities and improved electrochemical ***,MOF-derived metal compounds/carbons provide combined effects that increase both the capacitive and Faradaic reactions,leading to a superior overall *** review begins with an overview of the fundamental principles of LICs,followed by an exploration of synthesis strategies and ligand selection for MOF-based composite *** then analyzes the advantages of original MOFs and their derived materials,such as carbon materials and metal compounds,in enhancing LIC ***,the review discusses the major challenges faced by MOFs and their derivatives in LIC applications and offers future research directions and recommendations.

关键词： Lithium-ion capacitors MOFs Transition metal oxide Energy density Power density

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Inverse design of electromagnetically induced transparency (EIT) metamaterials based on autoencoder with reconstruction error 4

Inverse design of electromagnetically induced transparency (...

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4th IEEE China International Youth Conference on Electrical engineering, CIYCEE 2023

作者： Tian, Peishuai Zhou, Xingyu Hu, Yanqi Xiong, Yongqian Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Technology School of Electrical and Electronic Engineering Wuhan430074 China

ISBN: (纸本)9798350305562

In the paper, we design a new deep learning (DL) network to analysis and design the electromagnetically induced transparency (EIT) metamaterials. The network is divided into two parts: dimensionality reduction reconstruction network and inverse design. The dimensionality reduction reconstruction network mainly deals with high-dimensional input data. In the inverse design, we combine the convolutional neural network (CNN) and long short-term memory (LSTM) to predict the EIT metamaterial structure. The inverse design has reduced the mean square errors (MSE) on the validation set to 0.0032 and predict the structure parameters within the error of 0.26 μm, which are better than other reports. Besides, we avoid the overfitting problem and one-to-many problem to some extent. By comparing the spectra of real and predicted parameters on the validation set, we are confident that the network will pave a new path for designing EIT metamaterials. © 2023 IEEE.

关键词： Metamaterials

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Enhanced breakdown strength of BaTiO_(3)-based multilayer ceramic capacitor by structural optimization

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Rare Metals 2023年第8期42卷 2552-2561页

作者： Qian Liu Hua Hao Qing-Hu Guo Zhong-Hui Shen Jian Wang Ming-He Cao Zhong-Hua Yao Han-Xing Liu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Material Science and EngineeringWuhan University of TechnologyWuhan 430070China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Foshan 528220China Sanya Science and Education Innovation Park of Wuhan University of Technology Sanya 572000China International School of Material Science and Engineering Wuhan University of TechnologyWuhan 430070China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Center of Smart Materials and DevicesWuhan University of TechnologyWuhan 430070China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing International School of Material Science and EngineeringWuhan University of TechnologyWuhan 430070China

0.5 wt%Nb_(2)O_(5)doped 0.12BiAlO_(3)-0.88BaTiO_(3)(12BA5N)multilayer ceramic capacitor(MLCC-1)was prepared,which satisfied EIA X7R specification(where X is the minimum temperature,R is the percentage of capacitance variation limit)at 1 *** distribution of internal electric field under breakdown voltage was simulated by finite element method(FEM),indicating that the electric field strength increased significantly at the terminal of internal *** areas may become the headstream of breakdown for MLCC-1 due to the shape *** order to improve the breakdown performance of MLCC-1,it was optimized by 12BA5N+2G green sheets(prepared by 12BA5N ceramic powder with 2 wt%B-Al-Si glass additive),then MLCC-2 was obtained which satisfied EIA X8R *** BDS rose from 20 to29.4 kV·mm^(-1),and the electric field distribution of dielectric layer was also analyzed by ***,it was also found that the grain size and the dielectric constants of"core"and"shell"parts for the 12BA5N+2G dielectric layer both contributed to the enhanced BDS of MLCC-2according to the simulation results from FEM.

关键词： Multilayer ceramic capacitor(MLCC) Breakdown strength(BDS) Simulation Grain size Dielectric constant

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Sp/sp^(2)carbon ratio-driven high-throughput screening of electrocatalytic nitrogen reduction performance on transition metal single-atom catalysts

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Rare Metals 2024年第11期43卷 5781-5791页

作者： Ze-Xiang Yin Yu-Dan Li Yu-Huan Ye Yuan Liu Mian-Feng Li Zi-Jun Yang Xue-Rong Zheng Hao-Zhi Wang Yang Wang Yi-Da Deng State Key Laboratory of Marine Resource Utilization in South China Sea School of Materials Science and EngineeringHainan UniversityHaikou 570100China School of Materials Science and Engineering Tianjin Key Laboratory of Composite and Functional MaterialsKey Laboratory of Advanced Ceramics and Machining Technology(Ministry of Education)Tianjin UniversityTianjin 300072China

Single-atom catalysts(SACs)have been widely utilized in electrochemical nitrogen reduction reactions(NRR)due to their high atomic utilization and *** to the unique sp/sp^(2)co-hybridization,graphyne materials can offer stable adsorption sites for single metal *** investigate the influence of the sp/sp^(2)hybrid carbon ratio on the electrocatalytic NRR performance of graphyne,a high-throughput screening of 81 catalysts,with27 transition metals loaded on graphyne(GY1),graphdiyne(GY2),and graphtriyne(GY3),was conducted using firstprinciples *** results of the screening revealed that Ti@GY3 exhibits the lowest energy barrier for the rate-determining step(0.32 eV)in ***,to explore the impact of different sp/sp^(2)-hybridized carbon ratios on the catalytic activity of SACs,the mechanism of nitrogen(N_(2))adsorption,activation,and the comprehensive pathway of NRR on Ti@GY1,Ti@GY2,and Ti@GY3 was systematically *** was found that the ratio of sp/sp^(2)-hybridized carbon can significantly modulate the d-band center of the metal,thus affecting the energy barrier of the rate-determining step in NRR,decreasing from Ti@GY1(0.59 eV)to Ti@GY2(0.49 eV);and further to Ti@GY3(0.32 eV).Additionally,the Hall conductance was found to increase with the bias voltage in the range of 0.4-1 V,as calculated by Nanodcal software,demonstrating an improvement in the conductivity of the *** summary,this work provides theoretical guidance for modulating the electrocatalytic nitrogen reduction activity of SACs by varying the ratio of sp/sp^(2)hybrid carbon,with Ti@GY3 showing potential as an excellent NRR catalyst.

关键词： Nitrogen reduction reactions Single-atom catalysts Graphyne Ratio of sp/sp^(2)hybrid carbon High-throughput screening

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Modelling and analysis of half-/full-bridge hybrid MMC when riding through DC-side pole-to-ground fault

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High Voltage 2022年第3期7卷 496-509页

作者： Zhen He Jiabing Hu Lei Lin Pingliang Zeng School of Automation Hangzhou Dianzi UniversityHangzhouChina State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhanChina

In a modular multilevel converter-based high-voltage direct current(MMC-HVDC)system,the dc fault ride through(FRT)control is an effective way to deal with a dc-side pole-to-ground(PTG)***,the setting of FRT duration brings potential hazards:1)MMC will face the risk of“secondary short circuit”if FRT duration is short;2)ac grid may have power angle stability issue if FRT duration is *** avoid these hazards and provide theoretical guidance for the FRT duration setting,transient behaviour of dc fault current during the PTG FRT stage is explored in this ***,challenges of the transient analysis are summarised as non-linearity and high-order *** light of this,numerical and Hilbert-Huang Transformation methods are introduced to evaluate the non-linearity *** is found that the path of MMC from dc current to dc internal voltage is weakly ***,a linear transient model is built to analyse the dc fault *** participation factor analysis,the order of the proposed model is further reduced,so that an analytical expression of the dc fault current is approximately *** on the analytical expression,regularities and mechanism of dc fault current are fully *** of the transient analysis to the setting of FRT duration is elaborated in ***,the PSCAD/EMTDC simulation verifies the validity of the proposed model and analytical expression.

关键词： fault ground setting

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Swarming Magnetic Fe_(3)O_(4)@Polydopamine-Tannic Acid Nanorobots:Integrating Antibiotic-Free Superficial Photothermal and Deep Chemical Strategies for Targeted Bacterial Elimination

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Research 2025年第1期2024卷 840-853页

作者： Luying Si Shuming Zhang Huiru Guo Wei Luo Yuqin Feng Xinkang Du Fangzhi Mou Huiru Ma Jianguo Guan State Key Laboratory of Advanced Technology for Materials Synthesis and Processing International School of Materials Science and EngineeringWuhan University of TechnologyWuhanChina Wuhan Institute of Photochemistry and Technology WuhanChina School of Chemistry Chemical Engineering and Life ScienceWuhan University of TechnologyWuhanChina

Micro/nanorobots(MNRs)are envisioned to provide revolutionary changes to therapies for infectious diseases as they can deliver various antibacterial agents or energies to many hard-to-reach infection ***,existing MNRs face substantial challenges in addressing complex infections that progress from superficial to deep ***,we develop swarming magnetic Fe3O4@polydopamine-tannic acid nanorobots(Fe3O4@PDA-TA NRs)capable of performing targeted bacteria elimination in complicated bacterial infections by integrating superficial photothermal and deep chemical *** Fe3O4@PDA-TA nanoparticles(NPs),serving as building blocks of the nanorobots,are fabricated by in situ polymerization of dopamine followed by TA *** driven by alternating magnetic fields,Fe3O4@PDA-TA NPs can assemble into large energetic microswarms continuously flowing forward with tunable ***,the swarming Fe3O4@PDA-TA NRs can be navigated to achieve rapid broad coverage of a targeted superficial area from a distance and rapidly eradicate bacteria residing there upon exposure to near-infrared(NIR)light due to their efficient photothermal ***,they can concentrate at deep infection sites by traversing through confined,narrow,and tortuous passages,exerting sustained antibacterial action through their surface TA-induced easy cell adhesion and subsequent membrane ***,the swarming Fe3O4@PDA-TA NRs show great potential for addressing complex superficial-to-deep *** study may inspire the development of future therapeutic microsystems for various diseases with multifunction synergies,task flexibility,and high efficiency.

关键词： therapies infectious diseases complex infections chemical therapy magnetic nanoparticles polydopamine photothermal therapy targeted bacteria elimination tannic acid

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