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IEEE Conference on Electromagnetic Field Computation

作者： Hyunwon Jeong Youngmin Kim Chunghwan Kim Hyeun Soo Oh Shinhyung Kim Sangyhyeon Im Hyangbeom Lee Eco-Friendly Energy R&D Center Hanwha Ocean Seoul Korea Defense Technology R&D Center Hanwha Ocean Seoul Korea School of Electrical Engineering Dong-Eui University Busan Korea School of Electrical Engineering Soongsil University Seoul Korea

ISBN: (数字)9798350348958

ISBN: (纸本)9798350348965

In order to more simply model the complex structure and internal equipment of a ship made of magnetic materials, this study propose an analysis model that applies a certain permeability to space instead of internal structures. To verify this model, the electromagnetic analysis results are compared with the results measured on an actual ship, and its validity was confirmed.

关键词： Analytical models Magnetic field measurement Computational modeling Magnetic materials Permeability Magnetic fields Electromagnetic fields

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research on Pedestrian Target detection Method Based on Improved YOLOv8 Algorithm

Research on Pedestrian Target Detection Method Based on Impr...

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International Conference on Vision, Image and Signal Processing (ICVISP)

作者： Wei Li Jinsheng Li Fei Xiao Xin Li Smart City R&D Center Intelligent Technology Co. Ltd of Chinese Construction Third Engineering Bureau Wuhan China

ISBN: (数字)9798331541460

ISBN: (纸本)9798331541477

In the field of target detection, particularly pedestrian detection in complex scenarios, accuracy and real-time performance are persistent challenges. To address this issue, this paper introduces an enhanced model named MAM-Guided YOLOv8, which builds upon YOLOv8 by incorporating four distinct attention mechanisms: Local Attention Mechanism (LAM), Global Attention Mechanism (GAM), Efficient Channel Attention (ECA), and Axial Attention Mechanism (AA). Through a meticulously designed attention mechanism fusion strategy, the MAM-Guided YOLOv8 model aims to improve pedestrian detection capabilities in complex environments. Experimental results demonstrate that this model outperforms traditional methods on urban complex scene datasets, effectively balancing high precision with rapid processing demands. The contribution of this paper lies in the innovative integration of multiple attention mechanisms, significantly enhancing pedestrian detection accuracy and providing an effective solution for object detection tasks in practical applications.

关键词： Pedestrians Attention mechanisms Accuracy Signal processing algorithms Object detection Signal processing drives Feature extraction real-time systems Optimization

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Analysis of Microwave CPW Characterization on Printed Electronics Substrate

Analysis of Microwave CPW Characterization on Printed Electr...

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Asia-Pacific Conference on Microwave

作者： daisuke Yasunobu Hiroto Sakaki Kenjiro Nishikawa Faculty of Engineering Kagoshima University Kagoshima Japan Information Technology R&D Center Mitsubishi Electric Corp. Kanagawa Japan

ISBN: (数字)9798350363548

ISBN: (纸本)9798350363555

This paper evaluates coplanar waveguide (CPW) characteristics using printed electronics technology. This technology fabricates circuits on substrates such as resin or paper by printing metals. It enables the mass production of electronic circuits with low cost. Few cases have demonstrated microwave circuits on printed electronics substrate. Therefore, this paper investigated circuit performances based on CPW lines in microwave frequency band. The measurement results revealed no significant characteristic difference in loss per cm at 1 GHz when compared to CPW lines formed on conventional substrates such as resin. However, as the frequency increases, the transmission characteristics deteriorate more than those of conventional CPW. Transmission characteristics comparable to those of the conventional CPW were observed up to 1.2 GHz. The reason for the discrepancy between the measured and simulated results is that the lines were not straight due to the implementation using printed electronics technology. As a solution, we propose a new model layout and a wider gap spacing than 300 µm.

关键词： Wireless communication Simulation Layout Transmission line measurements Microwave circuits Loss measurement Coplanar waveguides Frequency measurement resins Substrates

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A Surrogate Model of rectifiers with LSTM Neural Networks for Various Modulated Signals

A Surrogate Model of Rectifiers with LSTM Neural Networks fo...

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Asia-Pacific Conference on Microwave

作者： Hiroto Sakaki Kenjiro Nishikawa Information Technology R&D Center Mitsubishi Electric Corpration Kanagawa Japan Electrical and Electronics Engineering Kagoshima University Kagoshima Japan

ISBN: (数字)9798350363548

ISBN: (纸本)9798350363555

This paper presents a surrogate model for rectifiers with LSTM neural networks (NNs) for various modulated signals. rectifiers in simultaneous wireless information and power transfer (SWIPT) systems frequently receive modulated signals. The rectifier exhibits memory effects because the envelope of the signal varies over time with modulation. Although many studies have modeled rectifier behavior with sinusoidal wave inputs, few have effectively addressed the challenges posed by modulated signal. We use Long Short-Term Memory (LSTM) neural networks to account for memory effects of rectifiers. This model predicts the output signal of the rectifier from the envelope signal of the modulated input signal. The proposed model uses LSTM networks and a dataset labeled according to each modulated signal, allowing a single NN to manage various signal types without complex calculations. Experimental results demonstrate that the predicted outputs from the NN closely match the measured rectifier's outputs, indicating the high accuracy and effectiveness of the proposed model.

关键词： Training Accuracy rectifiers Modulation Predictive models Long short term memory Simultaneous wireless information and power transfer

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design and Noise Tolerance Evaluation of Optical Circuit-based delta-Sigma d-roF Systems

Design and Noise Tolerance Evaluation of Optical Circuit-bas...

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OptoElectronics and Communications Conference, OECC

作者： Kentaro Okada daisuke Hisano Ken Mishina Michiya Hayama Soichiro Kametani Masaki Noda Akihiro Maruta Graduate School of Engineering Osaka University Suita Japan Information Technology R&D Center Mitsubishi Electric Corporation Kamakura Japan

This paper proposes an optical circuit-based delta-sigma modulator (OdSM) to achieve high-speed operation. The proposed OdSM uses optical devices and an electrical 1-bit analog-to-digital convertor. We report the impa... 详细信息

ISBN: (数字)9798350308396

ISBN: (纸本)9798350308402

关键词： Optical fibers Power demand Noise delta-sigma modulation Optical fiber communication Optical fiber devices Optical noise Optical modulation Optical devices High-speed optical techniques

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单原子钌分散的TiO_(2)促进高效水氧化产过氧化氢

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Science Bulletin 2023年第6期68卷 613-621,M0004页

作者：王兆磊徐文海谭国英段欣璇袁碧晨 Marshet Getaye Sendeku 刘海李天水王枫梅邝允孙晓明 State Key Laboratory of Chemical Resource Engineering College of ChemistryBeijing University of Chemical TechnologyBeijing 100029China Ocean Hydrogen Energy R&D Center Research Institute of Tsinghua UniversityShenzhen 518057China

电催化两电子水氧化为分布式合成H_(2)O_(2)提供了一个有效的途径.但是由于缺乏合适的阳极电催化剂,通过两电子水氧化合成H_(2)O_(2)难以兼得高选择性和高产率.本文将钌单原子可控地引入到TiO_(2)中,用于促进高效水氧化产H_(2)O_(2).研... 详细信息

电催化两电子水氧化为分布式合成H_(2)O_(2)提供了一个有效的途径.但是由于缺乏合适的阳极电催化剂,通过两电子水氧化合成H_(2)O_(2)难以兼得高选择性和高产率.本文将钌单原子可控地引入到TiO_(2)中,用于促进高效水氧化产H_(2)O_(2).研究发现,钌单原子的引入优化了材料对含氧中间体的吸附,在获得高电流密度的同时促进了H_(2)O_(2)产生.具体来说,通过对钌掺杂浓度的调控,所合成催化剂在120 mA cm^(-2)的电流密度下实现了62.8%的法拉第效率,并且H_(2)O_(2)产率高达24.2μmol min-1cm^(-2)(10 min内H_(2)O_(2)积累超过400 ppm).本文不仅证明了在高电流密度下高效率产H_(2)O_(2)的可能性,同时也验证了在电催化水氧化过程中调节中间体吸附的重要性.

关键词： Hydrogen peroxide synthesis Single atom Water oxidation Electrocatalysis

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Advancements in Suppressing Load disturbances of Electric Motor drives: An Overview 6

Advancements in Suppressing Load Disturbances of Electric Mo...

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6th IEEE Student Conference on Electric Machines and Systems, SCEMS 2023

作者： Liu, Chunqiang Li, Ziteng Li, Jiahui Han, Yaofei Sun, Ming Gong, Chao Hangzhou Institute of Technology Xidian University Xi'an China Zhuji Hechuang Motor Technology Co. Ltd Zhuji China Tongji University National Maglev Transportation Engineering R&d Center Shanghai China Northwestern Polytechnical University School of Automation Xi'an China

ISBN: (纸本)9798350329346

This paper provides a comprehensive overview of load disturbances in electric motor systems, their impact on performance, and existing control methods. First, load disturbances that can affect motor stability, control accuracy, dynamics, and energy efficiency, including static, dynamic, and nonlinear load variations, are introduced. Second, traditional control methods used for suppressing load disturbances like feedback and feedforward control are discussed, along with their advantages and limitations. Third, advanced control strategies such as intelligent control, self-adaptive control, and robust nonlinear control are introduced. Finally, this paper highlights the need for further research and identifies future directions. Overall, this review paper contributes to the development of robust motor control strategies, enhancing industrial automation and manufacturing processes. © 2023 IEEE.

关键词： Induction motors

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Observer-based Adaptive Fuzzy Backstepping Control of Pitch Angle of Wind Turbine

Observer-based Adaptive Fuzzy Backstepping Control of Pitch ...

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Electrical, Automation and Computer engineering (ICEACE), International Conference on

作者： Jiaru Song Haochen Zhang Jinqiang Zhang Peng Hu Jiangzhe Feng National Energy and Wind Power Operation Technology R&D (Experimental) Center Longyuan (Beijing) New Energy Engineering Technology Co. Ltd. Xi’an China National Energy and Wind Power Operation Technology R&D (Experimental) Center Longyuan (Beijing) New Energy Engineering Technology Co. Ltd. Beijing China

ISBN: (数字)9798350368208

ISBN: (纸本)9798350368215

In this paper, an adaptive fuzzy backstepping control method based on state observer is proposed for the individual pitch control problem of variable pitch wind turbines with state constraints and uncertainties. By designing a fuzzy state observer, the system state is estimated. The fuzzy logic system is used to approximate the unknown nonlinear term in the system. On the basis of backstepping control, dynamic surface control technology is introduced to solve the ‘complexity explosion’ phenomenon. By constructing the barrier Lyapunov function of the system, it is ensured that all the state variables of the system will not violate the constraints. Finally, the stability of the closed-loop system and the boundedness of all signals are proved by Lyapunov stability theory. The simulation results show that the proposed method can achieve effective tracking control of the pitch angle, which proves the effectiveness of the proposed method.

关键词： Fuzzy logic Backstepping Adaptive systems Uncertainty Simulation Observers Stability analysis Wind turbines Time-varying systems Lyapunov methods

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A Compact Medradio Implantable Monopole

A Compact MedRadio Implantable Monopole

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2023 IEEE International Symposium on Antennas and Propagation and USNC-UrSI radio Science Meeting, AP-S/UrSI 2023

作者： Paley, T. Kanyas, d. Gan, N. Lalehzari, S. Haridim, M. School of EE Engineering TAU-Tel Aviv University Ramat Aviv Israel Merchavim Institute of R&D in Negev Esmaizadeh Lab. Israel Chaim Sheba Medical Center Tel Hashomer Israel HIT - Holon Institute of Technology Faculty of Engineering Holon Israel

ISBN: (纸本)9781665442282

A compact implantable monopole antenna for the Medradio band is presented. Miniaturization is achieved by partial meandering of the radiating element, and by using a voltage nullifying circuit that substitutes for the ground plane. Simulation and experimental results show that the antenna achieves a realized gain of -19.8 dBi at volume 12.6 mm3. Max. SAr and telemetry range are evaluated. © 2023 IEEE.

关键词： Monopole antennas

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Sulfation of the extracellular polysaccharide from the edible fungus Stropharia rugosoannulata with its antioxidant activity

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Journal of Future Foods 2023年第1期3卷 37-42页

作者： Hui Hao Chun Cui Yuqing Xing Xuewei Jia Bingjie Ma Wenyi Kang Tianxiao Li Mingqi Gao Chunping Xu China Tobacco Henan Industry Co.Ltd. Zhengzhou 450000China College of Food and Biological Engineering Zhengzhou University of Light IndustryZhengzhou 450000China National R&D Center for Edible Fungus Processing Technology Henan UniversityKaifeng 475004China

An acidic extracellular polysaccharide(EPS)was gained from Stropharia rugosoannulata fermentation broth by the alcohol precipitate *** derivative of EPS(S-EPS)was gained by chlorosulfonic acid-pyridine method and the conditions were as follows:pyridine as the reaction solvent,temperature 80°C,and reaction time 90 *** chemical structure and chain conformation of EPS and S-EPS were characterized by FT-Ir,NMr and size exclusion chromatography(SEC)coupled with multi-angle laser light scattering(MALLS)***-Ir spectra indicated the sulfated group was linked to the *** EPS mainly consists of mannose,glucose and glucuronic acid,and the glycosidic bond type is mainly(1→4)-linked and(1→6)-linked.C6 and C2 were substituted by sulfate *** EPS was degraded into smaller molecular weight(Mw)polysaccharides with the larger molecular size(rg)after sulfation and S-EPS has better ***,the sulfated derivative S-EPS was found to have a better scavenging ability on hydroxyl radicals than *** proved that the chemical modification of *** polysaccharides by sulfation effectively enhanced their antioxidant activity.

关键词： Polysaccharides Stropharia rugosoannulata Sulfation Antioxidant activity

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