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17th Annual Conference of China Electrotechnical Society, CES 2022

作者： Yuan, Lida Guan, Xiaocun Guan, Shaohua Wu, Baoqi National Key Laboratory of Science and Technology on Vessel Integrated Power System Naval University of Engineering Wuhan430033 China

ISBN: (纸本)9789819903566

In order to solve the problem of multi-axis high-precision position control in material transportation, I designed a set of four-axis motion control system based on PID algorithm, using three closed-loop position control and a popular real-time industrial Ethernet technology – EtherCAT technology. The study shows that the application of EtherCAT technology in multi-axis control makes high-speed and high-precision multi-axis position control possible, and the loading of two pieces of material is realized in the test. This study enriches the research on communication networks in the field of automatic loading and provides theoretical guidance for the subsequent development of automatic loading control systems. © 2023, Beijing Paike Culture Commu. Co., Ltd.

关键词： Position control

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Ag/ AgCl-Covered Flexible Microneedle Array Dry Electrode for Electrocardiography Recording 18

Ag/ AgCl-Covered Flexible Microneedle Array Dry Electrode fo...

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18th International Conference on Nano/Micro Engineered and Molecular Systems, NEMS 2023

作者： Wang, Zhongyan Huang, Dong Li, Junshi Zhang, Zhitong Yang, Kaiming Li, Zhihong Peking University National Key Laboratory of Science and Technology on Micro/Nano Fabrication School of Integrated Circuits Beijing China

ISBN: (纸本)9798350333480

This paper reports a novel Ag/AgCl-covered flexible microneedle array dry electrode (Ag/AgCl-MNAE). The Ag/AgCl layer with rough and porous microstructure can uniformly cover the microneedle array substrate to enhance charge injection capability at the electrode-skin interface and the microneedle array can pierce the high-impedance stratum corneum to contact the epidermis layer directly. Therefore, the Ag/AgCl-MNAE has extremely low electrode-skin interface impedance (EII). Besides, the fabrication process is simple and low-cost without using expensive photolithography or physical vapor deposition equipment. The Ag/AgCl-MNAE and customized printed circuit board are integrated to realize the recording and wireless transmission of high-quality electrophysiological signals. Bio-signal recordings of electrocardiography (ECG) are successfully demonstrated with superior accuracy, demonstrating the great potential of this system in wearable health monitoring. © 2023 IEEE.

关键词： Electrodes

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Beamforming design for covert broadcast communication with hidden adversary

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science China(Information sciences) 2024年第6期67卷 384-398页

作者： Weiyu CHEN Haiyang DING Shilian WANG Junshan LUO Fengkui GONG College of Electronic Science and Technology National University of Defense Technology College of Information and Communication National University of Defense Technology State Key Laboratory of Integrated Service Networks Xidian University

This paper explores covert broadcast communication in a challenging situation in which the transmitter, Alice, faces uncertainty regarding the position of the passive adversary, Willie. In this situation,controlling the signal exposure becomes difficult. Specifically, this paper focuses on the cases where Alice can delimit the suspicious areas where Willie may be located. The suspicious areas can have arbitrary number and shapes. Under the Rician fading model, the analytical expression of Willie's detection performance is derived. Then, the transmit power, the beamforming direction, and the number of channel uses are jointly designed to minimize the optimal Willie's detection performance among all the possible positions of Willie, on the premise of satisfying receivers' quality-of-service requirements. To tackle the formulated knotty problem with an infinite number of irregular and discontinuous Willie's possible positions, the continuous nature of the antenna pattern is exploited to convert the original problem into the one with a finite number of possible positions, by sampling the suspicious areas. Then, different algorithms are developed to address the resultant non-convex optimization problem for single-antenna Willie and multi-antenna Willie, respectively. Numerical results demonstrate significant performance gains of the proposed scheme over the widely-adopted maximum ratio transmission scheme, which indicates that simply adjusting the main lobe towards the receiver is indeed far away from optimum and shows the importance of leveraging Alice's limited knowledge of Willie's position.

关键词： low-probability-of-detection communication multiple antennas covertness performance uncertain position parameters optimization

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A capture probability analytic model for the electromagnetic launched anti-torpedo torpedo

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Defence technology（防务技术） 2022年第2期18卷 261-270页

作者： Bao-qi Wu Xiao-cun Guan Shao-hua Guan Jing-bin Shi National Key Laboratory of Science and Technology on Vessel Integrated Power System Naval University of EngineeringWuhan430033China Jiangsu Automation Research Institute Lianyungang 222006China

With the unique characteristics,electromagnetic launch technology is applicable to launch shipborne anti-torpedo torpedo(ATT).This paper aims to establish an analytic model to pre-evaluate the capture probability of the electromagnetic launched *** mathematics model of the multi-stage coilgun and the trajectory of the ATT is established for *** influence factors of the capture probability are analyzed respectively,including the entry point dispersion of the ATT and the position dispersion of the incoming *** the advanced angle interception mode,the ATT search model is obtained according to the positional relationship,and the course error is synthetically calculated according to the differentiation of implicit function.A geometric method to calculate the integral boundaries of the probability density function is proposed,based on the relative motion of the ATT and the incoming *** verify the proposed integral model,the digital simulation and comparison is *** results reveal that the variation trends and the calculation value of the proposed analytic model are coincident with the statistic results from Monte Carlo *** implications of the results regarding the analytic model are discussed.

关键词： Electromagnetic launch Anti-torpedo torpedo Analytic model Dispersion variance Integral boundary

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Frequency-Domain-Based Model Analysis and Optimization control of Dual-Active-Bridge DC-DC Converter 17th

Frequency-Domain-Based Model Analysis and Optimization Contr...

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17th Annual Conference of China Electrotechnical Society, CES 2022

作者： Qiang, Ren Zhaojie, Huang National Key Laboratory of Science and Technology on Vessel Integrated Power System Naval University of Engineering Hubei430033 China

ISBN: (纸本)9789819904501

In order to deal with the computational complexity, model diversity, and lack of overall unification by the optimization strategy in the conventional time-domain piecewise analysis and optimization control of the dual-active bridge (DAB) converter, this paper has made a study of the DAB model and its optimization control in terms of frequency domain. First, a modulation method of phase-shift control is proposed so as to be convenient for the frequency-domain expression of DAB key electrical parameters. Then, the full-frequency-domain analytical expressions are deduced that refer to the primary and secondary voltages, leakage inductor current, active and reactive power, an analysis is made of the error and effectiveness of each parameter quantified by the fundamental frequency component, and a two-degree-of-freedom global optimization control strategy is proposed that makes the RMS of leakage inductor current minimal. Finally, the experimental verification is carried out. The result shows that the DAB model analysis and global optimization control method based on the frequency domain are feasible and effective. © 2023, Beijing Paike Culture Commu. Co., Ltd.

关键词： Global optimization

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Photoelectrocatalytic hydrogen evolution and synchronous degradation of organic pollutants by pg-C_(3)N_(4)/β-FeOOH S-scheme heterojunction

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science China(Technological sciences) 2024年第4期67卷 1238-1252页

作者： LI XiBao HAN Tao ZHOU YingTang XIE Yu LUO YiDan HUANG JunTong CHEN Zhi DENG Fang School of Materials Science and Engineering Nanchang Hangkong UniversityNanchang 330063China National-Local Joint Engineering Research Center of Heavy Metal Pollutants Control and Resource Utilization Nanchang Hangkong UniversityNanchang 330063China Zhejiang Key Laboratory of Petrochemical Environmental Pollution Control National Engineering Research Center for Marine AquacultureMarine Science and Technology CollegeZhejiang Ocean UniversityZhoushan 316022China

Crafting photoelectrocatalytic materials with robust oxidation-reduction properties for simultaneous hydrogen evolution and pollutant degradation poses a formidable *** this study,a pg-C_(3)N_(4)/β-FeOOH S-scheme heterostructure with a special energy band structure was developed by anchoring porous pg-C_(3)N_(4)on needle shapedβ-*** as a hole extraction layer,needle-leaf-likeβ-FeOOH can facilitate efficient hole migration and enhance charge ***,the optimized 0.2-pg-C_(3)N_(4)/β-FeOOH could degrade 78%of ofloxacin(OFLO)in 90 *** organic pollutants could absorb a large number of holes,which prompted a greater proportion of photogenerated electrons to actively participate in the hydrogen evolution reaction at the ***,the hydrogen production of 0.2-pg-C_(3)N_(4)/β-FeOOH reached 1452.88μmol cm^(-2)h^(-1),exhibiting a notable increase of 61.81-165.12μmol cm^(-2)h^(-1)compared with that in the absence of *** and theoretical calculation results underscore that this investigation is grounded in a distinctive electron and hole dual channel transfer *** findings offer novel insights for the future development of S-scheme heterojunction photoelectrocatalytic materials capable of concurrently degrading pollutants and promoting hydrogen evolution.

关键词： photoelectrocatalysis hydrogen evolution degradation synchronous S-scheme heterojunction

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Peracetic acid catalytic activation using Co_(3)O_(4) nanocluster decorated graphitic carbon nitride for cefapirin degradation in water

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science China(Technological sciences) 2024年第10期67卷 3103-3115页

作者： YIN ShiMei GAO YiXuan CHEN Long LI Fan LIU XiaoNa QI Fei LIU Wen Beijing Key Lab for Source Control Technology of Water Pollution College of Environmental Science and EngineeringBeijing Forestry UniversityBeijing 100083China Key Laboratory of Water and Sediment Sciences(Ministry of Education) College of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China School of Environmental Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China State Environmental Protection Key Laboratory of All Material Fluxes in River Ecosystems Peking UniversityBeijing 100871China Beijing National Laboratory for Molecular Sciences Peking UniversityBeijing 100871China

This study innovated cobalt-based catalytic nanocomposites(CCNs)for the heterogeneous activation of peracetic acid(PAA),a green and efficient advanced oxidation process for removing antibiotics from *** Co_(3)O_(4) catalysts exhibit limited activity due to stable electronic *** overcome this,CCNs were synthesized using a one-step condensation method,incorporating a size control strategy that anchors Co_(3)O_(4) nanoclusters within 4‒5 nm onto six-fold cavity of g-C3N4,simultaneously modifying the coordination environment of *** alteration significantly enhances the adsorption energy of PAA and catalytic activity compared to commercial Co_(3)O_(4).The improved performance of CCN2,in particular,is attributed to a shift in the cobalt d band center towards the Fermi level,facilitating electron delocalization and transfer,enhancing Co‒O bonding,and accelerating PAA ***2’s superior activity,with a cefapirin(CFP)degradation kinetic rate constant(k1=0.760 min^(−1))~11 times that of PAA direct oxidation(k1=0.070 min^(−1))and~5 times that of commercial Co_(3)O_(4)/PAA system(k1=0.164 min^(−1)),is due to its ability to generate dominant reactive species for antibiotic degradation,including alkoxy radicals(CH3C(=O)OO•),high valence metal(Co^(Ⅳ)(=O)^(2+)),and singlet oxygen(^(1)O_(2)),with the latter two being crucial for the degradation *** degradation of CFP involved three mechanisms,including direct oxidation by PAA,decarboxylation,and open-ring reactions at nitrogen *** research provides insights into developing high-activity catalysts for efficient PAA activation and antibiotic removal,leveraging the strategy of shifting the transition metal d band center.

关键词： peracetic acid Co_(3)O_(4)nanocluster high valence metal singlet oxygen cefapirin

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KCl acts as a flux to assist the growth of sub-millimeter-scale metallic 2D non-layered molybdenum dioxide

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Rare Metals 2025年第1期44卷 404-416页

作者： Li-Ying Deng Qing Zhang Wang-Yang Li Xiao-Yuan Ye Yi-Fan Zhao Shen-Zhong Chen Yu-Lan Wang Xing-Hui Wang Hui-Peng Chen Zhi-Yang Yu Qun Yan Shu-Ying Cheng Tai-Liang Guo Wen-Ping Hu Feng Ding Jie Sun National and Local United Engineering Laboratory of Flat Panel Display Technology College of Physics and Information EngineeringFuzhou UniversityFuzhou350100China Fujian Key Laboratory of Agricultural Information Sensing Technology College of Mechanical and Electrical EngineeringFujian Agriculture and Forestry UniversityFuzhou350002China Key Laboratory of Organic Integrated Circuit Department of ChemistrySchool of ScienceMinistry of Education and Tianjin Key Laboratory of Molecular Optoelectronic SciencesTianjin UniversityTianjin300072China Collaborative Innovation Center of Chemical Science and Engineering(Tianjin) Tianjin300072China College of Physics and Information Engineering Institute of Micro-Nano Devices and Solar CellsFuzhou UniversityFuzhou350108China State Key Laboratory of Photocatalysis on Energy and Environment College of ChemistryFuzhou UniversityFuzhou350116China Faculty of Materials Science and Engineering/Institute of Technology for Carbon Neutrality Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen518000China

Two-dimensional(2D)metal oxides(2DMOs),such as MoO_(2),have made impressive strides in recent years,and their applicability in a number of fields such as electronic devices,optoelectronic devices and lasers has been ***,2DMOs present challenges in their synthesis using conventional methods due to their non-van der Waals *** report that KCl acts as a flux to prepare large-area 2DMOs with sub-millimeter *** systematically investigate the effects of temperature,homogeneous time and cooling rate on the products in the flux method,demonstrating that in this reaction a saturated homogenous solution is obtained upon the melting of the salt and ***,the cooling rate was adjusted to regulate the thickness of the target crystals,leading to the precipitation of 2D non-layered material from the supersaturated solution;by applying this method,the highly crystalline non-layered 2D MoO_(2)flakes with so far the largest lateral size of up to sub-millimeter scale(~464μm)were *** studies have revealed that the 2D MoO_(2)features metallic properties,with an excellent sheet resistance as low as 99Ω·square^(-1 )at room temperature,and exhibits a property of charge density wave in the measurement of resistivity as a function of temperature.

关键词： 2D non-layered materials Metallic Metal oxide Thickness modulation Flux method

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Interception probability simulation and analysis of salvo of two electromagnetic coil launched anti-torpedo torpedoes

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Defence technology（防务技术） 2022年第11期18卷 2065-2073页

作者： Bao-qi Wu Guang-sen Wang Xiao-cun Guan Biao Wu National Key Laboratory of Science and Technology on Vessel Integrated Power System Naval University of EngineeringWuhan430033China Jiangsu Automation Research Institute Lianyungang222006China

Electromagnetic coil launch is an important branch of electromagnetic launch(EML)technology,which is suitable for launching anti-torpedo torpedo(ATT).This paper focuses on the EML parameters and the interception probability of the EML two ATTs *** on the launching model of a multi-stage coil launcher,the trajectory model of the ATT and the attacking torpedo,a calculation method for the EML two ATTs salvo parameters is proposed,with the conditions of capture and interception given *** adaptive particle swarm optimization(APSO)algorithm is proposed to calculate the optimal launching parameters,by designing the adaptive inertia weight and time-varying study *** to the analysis of the simulation with Monte Carlo method,EML will improve the interception probability effectively,and the interception probability is affected by the launching *** results demonstrate good performance of the proposed APSO in calculating EML parameters for the two ATTs salvo in certain combat *** of these results are particular regarding the command and decision in the anti-torpedo combat.

关键词： Interception probability Electromagnetic coil launch Anti-torpedo torpedo Adaptive PSO

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Prediction of Landing Speed of Aircraft Based on AE-ANFIS 3

Prediction of Landing Speed of Aircraft Based on AE-ANFIS

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3rd International Conference on Intelligent Computing and Human-Computer Interaction, ICHCI 2022

作者： Yang, H.X. Xu, X.H. Cui, X.P. Huang, J.J. National Key Laboratory of Science and Technology on Vessel Integrated Power System Naval University of Engineering Wuhan430033 China

ISBN: (纸本)9781510661301

Aiming at the problem that the advanced arresting device is difficult to obtain the landing speed of the aircraft in real time, this paper predicts the speed of the aircraft through the self-encoding fuzzy inference system (AE-ANFIS). Firstly, the working principle of the advanced arresting system is expounded, and the sensors directly related to the aircraft speed measurement are analyzed. And filter auxiliary variables through feature extraction and maximum information coefficient (MIC);then predict acceleration through adaptive fuzzy neural network (ANFIS);finally, for the problem of over-fitting caused by the large number of ANFIS rules, an auto-encoder (AE) method is proposed. Data dimensionality reduction is performed by extracting abstract features, which effectively improves the prediction accuracy of ANFIS. The experimental results show that the method proposed in this paper can fit the aircraft speed well, and the accuracy is better than traditional ANFIS and BP, LSTM, GoogleNet, AlexNet and other algorithms. © 2023 SPIE.

关键词： Fuzzy inference

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