检索结果-内蒙古大学图书馆

Design and development of the beamline for a proton therapy system

Nuclear Science and Techniques 2021年第12期32卷 53-63页

作者： Bin Qin Xu Liu Qu-Shan Chen Dong Li Wen-Jie Han Ping Tan Zhong-Qi Zhang Chong Zhou Ao-Te Chen Yi-Cheng Liao Wei Wang State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074HubeiChina

A proton therapy(PT)facility with multiple treatment rooms based on the superconducting cyclotron scheme is under development at Huazhong University of Science and technology(HUST).This paper attempts to describe the design considerations and implementation of the PT beamline from a systematic *** considerations covering beam optics and the influence of high-order aberrations,beam energy/intensity modulation,and beam orbit correction are *** addition to the technical implementation of the main beamline components and subsystems,including the energy degrader,fast kicker,beamline magnets,beam diagnostic system,and beamline control system are introduced.

关键词： Proton therapy Beamline Beam optics Beam energy/intensity modulation

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Modeling Analysis of Efficiency Improvement of Passive Array Coils Involved in Wireless Power Transfer System 1

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10th Frontier Academic Forum of Electrical engineering, FAFEE 2022

作者： Chen, Mengmeng Lu, Yang Liu, Renzhe Wu, Zhousen Rong, Cancan Xia, Chenyang Liao, Zhijuan Liu, Xu School of Electrical Engineering China University of Mining and Technology Xuzhou221116 China State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan430074 China

ISBN: (数字)9789819934041

ISBN: (纸本)9789819934034

The transmission efficiency of wireless power transfer system is generally low due to the large transmission distance. In addition, the transmitter and receiver are usually fixed, which will lead to weak robustness as well. In the paper, the solenoid array coils (SAC) are design to increase the mutual coupling between the two coils, which will enhance the transfer efficiency. SACs are composed of recycled array coils (RAC) and concentrated array coils (CAC), which are used to improve the density of magnetic lines of flux between the transmitter and the receiver. In this paper, the design process and modeling process are described in detail. The simulation results show that the transmission efficiency of the wireless power transfer system is improved from 72.79% to 83.01% after optimization. Moreover, the distribution of the system magnetic field and the circuit simulation waveforms also verify the correctness and feasibility of the passive array coils analysis and design, and provide a solution for the existing engineering problems. © Beijing Paike Culture Commu. Co., Ltd. 2023.

关键词： Circuit simulation

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Measurement of NO-penetration concentration in surface microdischarge treated model tissue, based on image processing technology 5

Measurement of NO-penetration concentration in surface micro...

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5th IEEE International Electrical and Energy Conference, CIEEC 2022

作者： Wang, Bingkai Wang, Yuqi Xiong, Zilan Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology Wuhan China

ISBN: (数字)9781665411042

ISBN: (纸本)9781665411042

Plasma has a wide range of applications in the medical field. The reactive oxygen species and reactive nitrogen species generated by plasma play a major role during the plasma treatment. However, the measurement of penetration concentration of reactive species into tissues has always been a major problem in the application of plasma medicine. In this paper, based on the digital image processing technology, we realized the measurement of mathrm{NO} {2} {-} penetration concentration inside model tissues by SMD treatment. Firstly, based on the specific color reaction of Griess and mathrm{NO} {2} {-}, the multivariate linear relationship between image color and standard concentration was established. Then, the model tissues were treated by SMD under different time and treating distance. Finally, the concentration of each point in each layer of the model tissue under SMD treatment was measured and calculated. It is found that the mathrm{NO} {2} {-} concentration distribution in the central part of each layer was uniform under SMD treatment, and the concentration gradually decreased with the penetration depth. This study offers a fast and smart diagnostic method for reactive species amount into tissue and provide data for clinic as well as numerical modeling investigation. © 2022 IEEE.

关键词： Tissue

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Inductor Multiplexing Equalization Circuit with Fuzzy Controller for Lithium Battery Equalization 5

Inductor Multiplexing Equalization Circuit with Fuzzy Contro...

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5th IEEE International Electrical and Energy Conference, CIEEC 2022

作者： Yuan, Aote Cai, Tao Xie, Jia Huazhong Univesity of Science and Technology The State Key Laboratory of Advanced Electromagnetic Engineering and Technology Wuhan China

ISBN: (数字)9781665411042

ISBN: (纸本)9781665411042

In this paper, an inductor multiplexing equalization for Li-ion battery is designed. Compared with the typical inductor equalization circuit, it can reduce the number of inductors and circuit volume. Then, a fuzzy controller based on balancing time and loss is designed. Simulation experiments on typical inductor equalization circuit and inductor multiplexing equalization circuit are carried out. The simulation results show that the inductor multiplexing equalization circuit based on the fuzzy control strategy has faster equalization speed and higher equalization accuracy. © 2022 IEEE.

关键词： Fuzzy control

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Asymmetric Feedforward Compensation For 3-Phase Coupled Buck-Boost Converter 5

Asymmetric Feedforward Compensation For 3-Phase Coupled Buck...

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5th IEEE International Electrical and Energy Conference, CIEEC 2022

作者： Han, Fu Shanxu, Duan Tao, Cai Junyang, Bao Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology Wuhan China

ISBN: (数字)9781665411042

ISBN: (纸本)9781665411042

In this paper, asymmetric operation of the 3-phase coupled buck-boost converter is analyzed. The form and solution process of the asymmetric operation are complicate, but the solution can be expressed and calculated in a simple form. By using parallel feedforward control, the dynamic performance of 3-phase coupled buck-boost converter can be improved obviously. Accuracy and effectiveness of the analysis and calculation are verified with the results of simulation and experiments. © 2022 IEEE.

关键词： Buck-Boost converter

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Energy Procurement and Retail Pricing for Electricity Retailers via Deep Reinforcement Learning with Long Short-term Memory

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CSEE Journal of Power and Energy Systems 2022年第5期8卷 1338-1351页

作者： Hongsheng Xu Jinyu Wen Qinran Hu Jiao Shu Jixiang Lu Zhihong Yang State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical Electronic Engineering Huazhong University of Science and TechnologyWuhan 430074China NARI Group Corporation Nanjing 211106China School of Electrical Engineering Southeast UniversityNanjing 210096China State Key Laboratory of Smart Grid Protection and Control Nanjing 211106China

The joint optimization problem of energy procurement and retail pricing for an electricity retailer is converted into separately determining the optimal procurement strategy and optimal pricing strategy,under the“price-taker”*** aggregate energy consumption of end use customers(EUCs)is predicted to solve for the optimal procurement strategy vis a long short-term memory(LSTM)-based supervised learning *** optimal retail pricing problem is formulated as a Markov decision process(MDP),which can be solved by using deep reinforcement learning(DRL)***,the performance of existing DRL approaches may deteriorate due to their insufficient ability to extract discriminative features from the time-series vectors in the environmental *** propose a novel deep deterministic policy gradient(DDPG)network structure with a shared LSTM-based representation network that fully exploits the Actor’s and Critic’s *** designed shared representation network and the joint loss function can enhance the environment perception capability of the proposed approach and further improve the optimization performance,resulting in a more profitable pricing *** simulations demonstrate the effectiveness of the proposed approach.

关键词： Deep reinforcement learning electricity market energy procurement long short-term memory retail pricing

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Rejuvenating LiNi_(0.5)Co_(0.2)Mn_(0.3)O_(2) cathode directly from battery scraps

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eScience 2023年第2期3卷 112-122页

作者： Yaqing Guo Chi Guo Pengjie Huang Qigao Han Fuhe Wang Hao Zhang Honghao Liu Yuan-Cheng Cao Yonggang Yao Yunhui Huang State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan430074 China State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074China Key Laboratory of Optoelectronic Chemical Materials and Devices Ministry of EducationSchool of Optoelectronic Materials&TechnologyJianghan UniversityWuhan 430056China

Battery recycling is indispensable for alleviating critical material shortages and enabling sustainable battery ***,current methods mostly focus on spent batteries,which not only require sophisticated disassembly and material extraction but also have unknown chemistries and states of health,resulting in high costs and extreme challenges to achieve ***,we propose the direct recycling and effective regeneration of air-degraded LiNi_(0.5)Co_(0.2)Mn_(0.3)O_(2)(NCM523)cathode directly from battery scraps generated during battery *** NCM523 shows surface degradation only a few nanometers deep and accordingly can be regenerated without adding Li,achieving restored properties(170 mAh g^(-1) at 0.1 C,92.7%retention after 1000 cycles)similar to those of fresh commercial *** analysis shows that scrap recycling has a profit of$1.984 kg^(-1),which is~10 times higher than conventional recycling,making it practical and economical to rejuvenate slightly degraded electrode materials for sustainable battery manufacturing.

关键词： Battery scrap Battery recycling Air degradation Cathode regeneration Techno-economic analysis

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A wind farm planning method considering frequency security constraint based on wind farm participation in primary frequency regulation 3

A wind farm planning method considering frequency security c...

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2024 3rd International Conference on Green Energy and Power Systems, ICGEPS 2024

作者： Jin, Chu Liu, Ruoping Zuo, Zhengmin Luo, Shuxin Li, Zuohong Liu, Shengfu Grid Planning & Research Center of Guangdong Power Grid Corporation Guangzhou510080 China State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan430074 China

Renewable energy sources such as wind power, connected to the grid on a large scale, reduce the rotational inertia and frequency regulation of the power system. Many studies have included frequency security constraints (FSC) in power system scheduling to ensure system frequency stability, but few studies have included FSC in grid planning. Therefore, this paper establishes a planning model for wind farms that considers the FSC based on the wind turbines' participation in the primary frequency regulation (PFR) by obtaining the maximum deviation value constraint of the system frequency through the system frequency response (SFR) model. Tests were conducted on the IEE30-node system, and the results show that the proposed model enhances the system frequency response capability and ensures system security. © Published under licence by IOP Publishing Ltd.

关键词： Frequency response

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An Experimental Study on the Characteristics of Gliding Arc Discharge in CO2 Dissociation with an Inlet Laval Nozzle 5th

An Experimental Study on the Characteristics of Gliding Arc ...

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5th International Symposium on Plasma and Energy Conversion, iSPEC 2023

作者： Zhang, Zixiao Liu, Yang Zhao, Xiangen Du, Yaping He, Junjia State Key Laboratory of Advanced Electromagnetic Technology Huazhong University of Science and Technology Wuhan430074 China Department of Building Environment and Energy Engineering The Hong Kong Polytechnic University 999077 Hong Kong

ISBN: (纸本)9789819722440

The Gliding Arc Discharge (GAD), a kind of non-equilibrium plasma, has gathered substantial interest in the domain of CO2 decomposition due to its high energy efficiency. Current research has demonstrated that the flow rate significantly impacts the CO2 dissociating, but the discharge characteristic is not well understood. In this paper, experiments were carried out to compare the GAD characteristics in CO2 dissociating between the traditional reactor and the reactor featuring an inlet Laval nozzle, in which current and voltage waveforms, high-speed optical images, and Schlieren images were recorded simultaneously. The experimental results show that in the reactor with an inlet Laval nozzle, the re-ignition voltage, discharge period, and power decreased by 75%, 39%, and 87%, respectively, and a higher probability of back-breakdown occurring at the same flow rate (4 L/min), compared to the typical GAD reactor. In addition, although the luminosity of the GAD plasma diminished, the intensified turbulence caused by the high flow rate inside the reactor through the Laval nozzle expanded the diffusion region of the hot gas. These findings highlight the multi-perspective discharge characteristics of high-flow-rate GAD, thereby enhancing comprehension of the diverse mechanisms through which high flow rate affects CO2 conversion. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Nozzles

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Special issue on the 70th anniversary of HUST

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Plasma Science and technology 2022年第12期24卷 4-5页

作者： Xiwei HU International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics State Key Laboratory of Advanced Electromagnetic Engineering and TechnologySchool of Electric and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074People's Republic of China

Huazhong University of Science and technology (HUST) celebrates its 70th anniversary in *** was transferred to a comprehensive and modern university on the international level in the 1980s from its traditional engineering predecessor,Huazhong Institute of technology,founded in the early 1950s as part of China’s academic institution reorganization.

关键词： anniversary 70t transferred

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