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The 5.8 T Cryogen-Free Gyrotron Superconducting Magnet System on HL-2A

Plasma Science and technology 2014年第4期16卷 410-414页

作者：夏冬辉黄梅周俊白兴宇郑铁流饶军庄革 State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Southwestern Institute of Physics

A 5.8 T cryogen-free superconducting magnet （SCM） system with a warm bore hole of 160 mm in diameter, used for gyrotrons operating in the frequency range from 68 GHz to 140 GHz, is installed on the site of the HL-2A tokamak. The SCM consists of two separate solenoidal magnetic coils connected in series, a 4.2 K Gifford-McMahon （GM） refrigerator, a com- pressor, a coil power supply and two temperature monitors. The performance, test and preliminary experimental results of this SCM system are described in this paper. The magnetic field distribu- tion was measured along the axis, and a dummy tube was used for adjusting the magnet system. Finally, the magnet was used for the operation of a 68 GHz/500 kW gyrotron, which is part of an electron cyclotron resonance heating （ECRH） system. With an additional auxiliary coil and after adjusting tile magnet system, a maximum output power for the ECRH system of up to 400 kW was achieved.

关键词： ECRH gyrotron superconducting magnet cryogen free

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On the charged aerosols generated by atmospheric pressure non‐equilibrium plasma

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High Voltage 2021年第3期6卷 408-425页

作者： Yanzhe Zhang He Cheng Haotian Gao Dawei Liu Xinpei Lu State Key Lab of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuHanHuBeiChina

Recently,charged aerosols are used widely in many applications,such as fog elimination,inactivation of airborne viruses and so *** pressure non‐equilibrium plasma(APNP)have become an efficient way to generate charged *** the traditional pin‐plate or wire‐plate APNP sources,the new APNP sources such as large scale corona discharge system and air plasma jet array are *** sources can increase the ion density in open air and generate adjustable large plasma plume,which are helpful in increasing the charging efficiency on *** the interactions between plasma and aerosols is quite complicated,the preliminary study suggests that the diffusion charging dominates aerosols below 0.1μm,field charging dominates aerosols larger than 1μm,and the photo charging also contributes to aerosols *** reactive charged aerosols have shown their potential in the artificial rain enhancement,biomedicine,and ma-terial ***,challenges and opportunities for theoretical,experimental,and application research in related cross‐disciplinary areas are presented to stimulate critical discussions and collaborations in the future.

关键词： equilibrium charging discussions

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electromagnetic and Cryogenic Design of a Liquid-Helium-Free 9 T NbTi Magnet for Scanning Tunneling Microscopy

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IEEE Transactions on Applied Superconductivity 2025年

作者： Song, Yunxing Li, Jianglan Cheng, Zhiwen Liu, Mengyu Li, Xian Li, Liang Wang, Qiuliang Huazhong University of Science and Technology Wuhan National High Magnetic Field Center Wuhan430074 China Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Technology Wuhan430074 China Chinese Academy of Sciences Institute of Electrical Engineering Beijing100190 China University of Chinese Academy of Sciences Beijing100049 China

The strong magnetic field generated by the superconducting magnet can significantly enhance the capabilities of Scanning Tunneling Microscopy (STM) in exploring novel quantum materials, nano-magnetic systems, and topological materials. A liquid-helium-free 9 T NbTi magnet for STM has been developed at the Wuhan National High Magnetic Field Center (WHMFC) and is entirely cooled with a GM cryocooler. This magnet features five independent coils, a cold bore diameter of 95 mm, a rated operating current of 80.7 A, and a rated central magnetic field of 9.0 T. The magnetic field uniformity over a 1 cm diameter spherical volume (DSV) is 0.1%. This paper presents the electromagnetic and cryogenic design of the magnet, along with a thermal and mechanical analysis and optimization of the current leads and cooling paths. The optimized magnet system successfully reaches a temperature below 4 K. After six training quenches, the magnet was successfully ramped to and parked at 9.2 T. © 2002-2011 IEEE.

关键词： III-V semiconductors

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Deep Reinforcement Learning Based Bi-layer Optimal Scheduling for Microgrids Considering Flexible Load Control

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CSEE Journal of Power and Energy Systems 2023年第3期9卷 949-962页

作者： Zitong Zhang Jing Shi Wangwang Yang Zhaofang Song Zexu Chen Dengquan Lin the State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074China

In this paper,the bi-layer scheduling method for microgrids,based on deep reinforcement learning,is proposed to achieve economic and environmentally friendly ***,considering the uncertainty of renewable energy,the framework of day-ahead and intra-day scheduling is established,and the implementation scheme for both price-based and incentive-based demand response(DR)for the flexible load is ***,comprehensively considering the operating characteristics of the microgrid in the day-ahead and intra-day time scales,a bi-layer scheduling model of the microgrid is *** terms of algorithms,since day-ahead scheduling has no strict requirement for dispatching time,the particle swarm optimization(PSO)algorithm is used to optimize the time-of-use electricity price and distributed power output for the next *** the environmental fluctuations and requirements for rapidity of intra-day online scheduling,the deep reinforcement learning(DRL)algorithm is adopted for ***,based on the data from the actual microgrid,the rationality and effectiveness of the proposed scheduling method is *** results show that the proposed bi-layer scheduling based on the PSO and DRL algorithms achieves the optimization of scheduling cost and calculation speed,and is suitable for microgrid online scheduling.

关键词： Bi-layer optimal scheduling demand response deep reinforcement learning microgrid scheduling

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LangPert: Detecting and Handling Task-level Perturbations for Robust Object Rearrangement

arXiv

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arXiv 2025年

作者： Yin, Xu Yoon, Min-Sung Huo, Yuchi Zhang, Kang Yoon, Sung-Eui Daejeon34141 Korea Republic of State Key Lab of CAD and CG Zhejiang University China Zhejiang Lab 310058 China School of Electrical Engineering KAIST Korea Republic of Faculty of School of Computing Korea Advanced Institute of Science and Technology Deajeon34141 Korea Republic of

Task execution for object rearrangement could be challenged by Task-Level Perturbations (TLP)—unexpected object additions, removals, and displacements—that can disrupt underlying visual policies and fundamentally compromise task feasibility and progress. To address these challenges, we present LangPert, a language-based framework designed to detect and mitigate TLP situations in tabletop rearrangement tasks. LangPert integrates a Visual Language Model (VLM) to comprehensively monitor policy’s skill execution and environmental TLP, while leveraging the Hierarchical Chain-of-Thought (HCoT) reasoning mechanism to enhance the Large Language Model (LLM)’s contextual understanding and generate adaptive, corrective skill-execution plans. Our experimental results demonstrate that LangPert handles diverse TLP situations more effectively than baseline methods, achieving higher task completion rates, improved execution efficiency, and potential generalization to unseen scenarios. © 2025, CC BY-SA.

关键词： Visual languages

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Effect of oxygen doping sources on enhancing air stability and lithium metal compatibility of Li 5.5 PS 4.5 Cl 1.5 electrolyte

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Chinese Chemical Letters 2025年

作者： Linfeng Peng Cong Liao Jiayue Peng Shuai Chen Tianyu Lei Shijie Cheng Jia Xie State Key Laboratory of Advanced Electromagnetic Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan 430074 China

Oxygen (O) doping is a promising strategy for enhancing the air stability and lithium metal compatibility of sulfide solid electrolytes (SSEs). However, the impact of various O sources on the structure and properties of SSEs remains unclear. In this study, we synthesized a series of O-doped electrolytes, Li5.5PS4.5-xOxCl1.5 (LPSCOx, 0.1 ≤ x ≤ 0.5), using Li2O and P2O5 as O sources, and systematically investigated their differences in structure, air stability, and electrochemical properties. O preferentially substitutes sulfur (S) at the 16e site and begins to replace S at the 4d site once a certain O concentration is reached. Notably, the P2O5-doped electrolytes (P-LPSCOx) exhibit a greater oxygen tolerance content (0.24) at the 16e site, along with better air stability, higher ionic conductivity, and superior lithium metal compatibility. XRD, SEM, and XPS analyses reveal that the P2O5-doped electrolytes exhibit larger cell parameters, higher densification, and fewer side reactions with lithium metal compared to the Li2O-doped counterparts. This study provides valuable insights into the development of high-performance O-doped sulfide electrolytes.

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A novel flexible plasma array for large-area uniform treatment of an irregular surface

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Plasma Science and technology 2022年第3期24卷 130-137页

作者： Baowang LIU Fei QI Dejiang ZHOU Lanlan NIE Yubin XIAN Xinpei LU State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and TechnologyWuhan 430074People's Republic

In this work,we demonstrate a flexible multi-pin plasma generator with movable electrodes,which can change the shape of the electrode array freely,and then provide a large-area uniform plasma for the treatment of surfaces of different *** characteristics including U-I waveforms and discharge images and sterilization performance under three different electrode configurations(flat-flat,flat-curve,curve-curve)are *** similar results are acquired between the flat-flat configuration and the curve-curve configuration,which is much better than that under flat-curve *** flexible multi-pin plasma generator offers a simple method to treat different irregularly shaped surfaces uniformly with a single ***,this device provides a foundation for developing a self-adaption large-scale uniform plasma generator by further introducing automatic adjustment of the position of every electrode driven by motors with discharge current feedback in the following *** it will promote the applications of atmospheric-pressure cold plasmas significantly.

关键词： flexible multi-pin electrode large-area uniform plasma sterilization

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Analysis on Circulating Current and Split Capacitor Voltage Balance for Modular Multilevel Converter Based Three-phase Four-wire Split Capacitor DSTATCOM

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Journal of Modern Power Systems and Clean Energy 2021年第3期9卷 657-667页

作者： Lei Lin Jialu He Chen Xu State Key Laboratory of Advanced Electromagnetic Engineering and Technology and School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074China

We propose a modular multilevel converter(MMC)based three-phase four-wire(3P4W)split capacitor distribution static synchronous compensator(DSTATCOM),aiming at compensating unbalanced and reactive load *** to the zero-sequence current compensation,the circulating current char-acteristics of 3P4W MMC-DSTATCOM are different from conventional ***,the distinct working principle of IMMC would affect the features of split capacitor *** decoupled positive-,negative-and zero-sequence second-order and DC components of the circulating current are deduced *** proportional-integral controllers with dual dq transformation are employed to suppress the positive-and negative-sequence components of second-order circulating current,while quasi proportional-resonance controller is designed to eliminate the zero-sequence ***,the phenomenon of the unbalanced split capacitor voltages is revealed,and fast-tracking balancing method by controlling zero-sequence current flowing through the split capacitors is *** simulation results verify the accuracy of the analysis and the feasibility of the suppression methods.

关键词： Circulating current modular multilevel converter(MMC) distribution static synchronous compensator(DSTATCOM) split capacitor three-phase four-wire(3P4W)

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A Model Predictive Control Method for Hybrid Energy Storage Systems

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CSEE Journal of Power and Energy Systems 2021年第2期7卷 329-338页

作者： Siyuan Chen Qiufan Yang Jianyu Zhou Xia Chen State Key Laboratory of Advanced Electromagnetic Engineering and Technology and School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074China

The traditional PI controller for a hybrid energy storage system(HESS)has certain drawbacks,such as difficult tuning of the controller parameters and the additional filters to allocate high-and low-frequency power *** paper proposes a model predictive control(MPC)method to control three-level bidirectional DC/DC converters for grid-connections to a HESS in a DC ***,the mathematical model of a HESS consisting of a battery and ultra capacitor(UC)is established and the neutral point voltage imbalance of a three-level converter is solved by analyzing the operating modes of the ***,for the control of the grid-connected converters,an MPC method is proposed for calculating steady-state reference values in the outer layer and the dynamic rolling optimization in the inner *** outer layer ensures the voltage regulation and establishes the current predictive model,while the inner layer,using the model predictive current control,makes the current follow the predictive value,thus reducing the system current *** cascaded topology has two independent controllers and is free of filters to realize the high-and low-frequency power allocation for a ***,it allows two types of energy storage devices to independently regulate the voltage and realizes the power allocation of the battery and ***,simulation studies are conducted in PSCAD/EMTDC,and the effectiveness of the proposed HESS control strategy is verified in a case,such as a controller comparison and fault scenario.

关键词： Double layer control method hybrid energy storage system(HESS) model predictive control(MPC) three-level DC/DC converter

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Corrigendum to“Elastic properties of Cu–6wt%Ag alloy wires for pulsed magnets investigated by ultrasonic techniques”

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Chinese Physics B 2025年第4期34卷 625-625页

作者： Ziyu Li Tianyi Gu Wenqi Wei Yang Yuan Zhuo Wang Kangjian Luo Yupeng Pan Jianfeng Xie Shaozhe Zhang Tao Peng Lin Liu Qi Chen Xiaotao Han Yongkang Luo Liang Li Wuhan National High Magnetic Field Center Huazhong University of Science and TechnologyWuhan 430074China School of Physics Huazhong University of Science and TechnologyWuhan 430074China State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and TechnologyWuhan 430074China School of Materials Science and Engineering State Key Laboratory for Materials Processing and Die&Mold TechnologyHuazhong University of Science and TechnologyWuhan 430074China

Figure 3 in the paper[***.B 34020701(2025)]contains an axis labeling *** revised figure is *** modification does not affect the result presented in the paper.

关键词： high-field magnet Cu-Ag alloy ultrasonic techniques elastic constants

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