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IEEE Conference on Energy Internet and Energy System Integration (EI2)

作者： Yuxi Wang Kun Qian Minghao Wen State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China

ISBN: (纸本)9781665434263

The short-circuit currents characteristics of renewable energy source (RES) and high voltage direct current (HVDC) system are different from the short-circuit currents characteristics of traditional synchronous generator (SG). According to the fault-ride-through (FRT) requirements of different types of RES, the steady-state short-circuit currents calculation models of doubly-fed induction generator (DFIG) and inverter-interface renewable energy source (IIRES) such as photovoltaic (PV) and direct-drive permanent magnetic synchronous generator (D-PMSG) are built in this paper. Based on the converter switching function model and the HVDC control system, the calculation model of HVDC system steady-state short-circuit currents is built. Combined with RES and HVDC system short-circuit currents calculation models, a short-circuit currents calculation method for power system with multiple types RES and HVDC under ac power system fault is proposed. Finally, the effectiveness of the proposed method of short-circuit currents calculation is verified by simulation cases.

关键词： Renewable energy sources Short-circuit currents HVDC transmission Doubly fed induction generators System integration Synchronous generators Mathematical models

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Communication Jamming of High Power Microwave Pulse to UAV

Communication Jamming of High Power Microwave Pulse to UAV

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International Conference on Vacuum Electronics

作者： Ruilong Song Jingzhi Zheng Mingwen Zhang Xu Chen Chunguang Ma Yong LU School of Electronic Science and Engineering University of Electronic Science and Technology of China Chengdu Sichuan China State Key Laboratory of Electromagnetic Space Cognition and Intelligent Control Technology Beijing China

High power microwave pulse (HPMP) is an effective way to anti unmanned aerial vehicle (UAV), and the jamming of frequency hopping (FH) communication is the best starting point to achieve anti UAV. This paper uses DJI Phantom 4 Pro as the research object and analyzed the relationship between the power, pulse width and duty cycle of HPMP to achieve the jamming of FH communication of the UAV based on its FH communication characteristics, and the reliability of the analysis is verified through experiments. This paper can provide a good idea for the design of an anti UAV scheme based on HPM.

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Longitudinal Image Synthesis for Early Brain Development with Age Awareness 22

Longitudinal Image Synthesis for Early Brain Development wit...

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22nd IEEE International Symposium on Biomedical Imaging, ISBI 2025

作者： Fang, Yu Xiong, Honglin Huang, Jiawei Wang, Xin Shen, Zhenrong Liu, Feihong Cai, Xinyi Zhang, Han Wang, Qian School of Biomedical Engineering Shanghai Jiao Tong University Shanghai China School of Biomedical Engineering ShanghaiTech University State Key Laboratory of Advanced Medical Materials and Devices Shanghai China School of Information and Technology Northwest University Xi'an China Shanghai Clinical Research and Trial Center Shanghai China

ISBN: (纸本)9798331520526

The human brain undergoes dramatic structural and functional changes during the first two postnatal years. Longitudinal magnetic resonance imaging (MRI) enables the observation of dynamic transformations in infant brains over time. However, the longitudinal sampling design and missing time points due to subject dropouts lead to the dispersion of discrete time points. The ability to accurately predict MRI scans of an infant's brain at various time points would aid in dataset construction, offering research potential for applications such as atlas construction and longitudinal trajectory analysis. This task is challenging due to the complex changes in structure and contrast during early brain development. In this work, we propose a three-stage framework with age awareness to predict infant brain MRIs. Our approach focuses on modeling three key aspects of early brain development at each stage: volumetric expansion, tissue growth, and myelination. We validated our technique on longitudinal MRI data from the Baby Connectome Project, consisting of 491 T1-weighted images. Quantitative analysis demonstrates that our model synthesizes realistic infant brain MRIs at target ages with high anatomical accuracy. Our predicted images exhibit appropriate structural alignment and tissue contrast reflective of the age. The code will be available upon acceptance. © 2025 IEEE.

关键词： Functional neuroimaging

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Regulating adsorption ability toward polysulfides in a porous carbon/Cu_(3)P hybrid for an ultrastable high-temperature lithium-sulfur battery

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Carbon Energy 2021年第6期3卷 841-855页

作者： Yichuan Guo Rabia Khatoon Jianguo Lu Qinggang He Xiang Gao Xiaopeng Yang Xun Hu Yang Wu Jiale Lian Zhoupeng Li Zhizhen Ye State Key Laboratory of Silicon Materials Key Laboratory for Biomedical Engineering of Ministry of EducationSchool of Materials Science and EngineeringZhejiang UniversityHangzhouChina Ningbo Research Institute Zhejiang UniversityNingboChina Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology College of Chemical and Biological EngineeringZhejiang UniversityHangzhouChina School of Materials Science and Engineering Jinan UniversityJinanChina

Lithium-sulfur batteries(LSBs)can work at high temperatures,but they suffer from poor cycle life stability due to the“shuttle effect”of *** this study,pollen-derived porous carbon/cuprous phosphide(PC/Cu_(3)P)hybrids were rationally synthesized using a one-step carbonization method using pollen as the source material,acting as the sulfur host for *** the hybrid,polar Cu_(3)P can markedly inhibit the“shuttle effect”by regulating the adsorption ability toward polysulfides,as confirmed by theoretical calculations and experimental *** an example,the camellia pollen porous carbon(CPC)/Cu_(3)P/S electrode shows a high capacity of 1205.6 mAh g^(−1) at 0.1 C,an ultralow capacity decay rate of 0.038%per cycle after 1000 cycles at 1 C,and a rather high initial Coulombic efficiency of 98.5%.The CPC/Cu_(3)P LSBs can work well at high temperatures,having a high capacity of 545.9 mAh g^(−1) at 1 C even at 150℃.The strategy of the PC/Cu_(3)P hybrid proposed in this study is expected to be an ideal cathode for ultrastable high-temperature *** believe that this strategy is universal and worthy of in-depth development for the next generation energy storage devices.

关键词： density functional theory calculation high operating temperature lithium-sulfur battery polysulfide adsorption porous carbon/Cu_(3)P hybrid ultrastability

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P-12.4: ITO-induced biexciton quenching in CdSe colloidal quantum dots

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SID Symposium Digest of Technical Papers 2024年第S1期55卷 1353-1354页

作者： Guohong Xiang Jingrui Ma Xiangwei Qu Kai Wang Hoi Sing Kwok Xiao Wei Sun Institute of Nanoscience and Applications and Department of Electrical and Electronic Engineering Southern University of Science and Technology Shenzhen China 518055 State Key Laboratory of Advanced Displays and Optoelectronics Technologies the Hong Kong University of Science and Technology Hong Kong China Key Laboratory of Energy Conversion and Storage Technologies (Southern University of Science and Technology) Ministry of Education Guangdong University Key Laboratory for Advanced Quantum Dot Displays and Lighting Guangdong-Hong Kong-Macao Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and Devices and Shenzhen Key Laboratory for Advanced Quantum Dot Displays and Lighting Southern University of Science and Technology Shenzhen China 518055

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基于萘并噻吩二酰胺封端的三联受体的高性能n型有机半导体（英文）

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Science China Materials 2025年

作者：张水鑫吴锃柳蒂赵岩陈少杰王洋刘云圻 Department of Materials Science State Key Laboratory of Molecular Engineering of Polymers Laboratory of Advanced Materials Fudan University School of New Energy Ningbo University of Technology Beijing National Laboratory for Molecular Sciences Key Laboratory of Organic Solids Institute of Chemistry Chinese Academy of Sciences

n型有机半导体材料的开发对有机场效应晶体管（OFETs）的性能提升及其在p-n互补逻辑电路中的集成至关重要.深入理解这些材料的结构-性能关系对于其性能的进一步优化至关重要.本研究集中设计并合成了两种新型的n型三联受体,NTI-BTT和NTI-...

n型有机半导体材料的开发对有机场效应晶体管（OFETs）的性能提升及其在p-n互补逻辑电路中的集成至关重要.深入理解这些材料的结构-性能关系对于其性能的进一步优化至关重要.本研究集中设计并合成了两种新型的n型三联受体,NTI-BTT和NTI-BT,采用萘并噻吩二酰胺（naphtho[2,3-b]thiophene diimide,NTI）核心作为基础.我们的研究重点是探讨通过融合和/或间隔体插入实现的噻吩扩展对这些材料的物化和电荷输运特性的影响.值得注意的是,与基于萘二酰胺（NDI）的对比物相比,NTI封端的三联体表现出更强的电子吸引能力,其特点是更深的能级和更平面的骨架.然而,在基于NTI-BT的OFETs中,噻吩融合导致电子迁移率显著下降至0.004 cm2V-1s-1.这种差异可以归因于多晶结构,其中晶粒间的多个晶界增加了陷阱态密度,进而导致迁移率降低.对于NTI-BTT,在NTI和苯并噻二唑单元之间引入噻吩间隔体被发现可以有效增强n型电荷输运.此分子修饰提高了π-π相互作用并减小了分子间距离,导致π-π堆积距离短至3.45?.因此,NTI-BTT表现出显著提高的电子迁移率,为0.13 cm2V-1s-1,比基于NDI的对比物高出四倍.这些发现为n型有机半导体分子的设计做出了重要贡献,并为实现更高性能的OFETs提供了宝贵见解.

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Pre-Oxidation for Enhanced Resistance of Afa Steel to High-Temperature Molten Salt Corrosion

SSRN

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SSRN 2024年

作者： Jiang, Haocheng Yu, Haicun Gao, Yunteng Zhan, Faqi Xu, Shipeng La, Peiqing State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals School of Materials Science and Engineering Lanzhou University of Technology Lanzhou730050 China Lanzhou University of Technology China

This study employs vacuum induction melting followed by pre-oxidation strategy to develop an alumina-forming austenitic (AFA) steel, aiming to enhance its resistance against corrosion in molten salt environments. The corrosion behavior of the steel, both before and after pre-oxidation, is investigated in a ternary carbonate molten salt at 650°C. The results reveal that pre-oxidation markedly decreases the corrosion rate from 1000.72 μm/year to 204.99 μm/year. This reduction is attributed to the formation of a protective layer composed of Al2O3 and LiAlO2 oxides. It highlights the effectiveness of pre-oxidation in improving the durability of materials against corrosive damage in high-temperature molten salt environments. © 2024, The Authors. All rights reserved.

关键词： Alumina

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Parameter Design and Performance Analysis for High-efficiency and Low-Ripple Electrolyzed Waterto-Hydrogen Converter 4

Parameter Design and Performance Analysis for High-efficienc...

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4th International Conference on Power and Energy technology, ICPET 2022

作者： Liu, Haijun Li, Weiguo Mu, Xiaobin Xu, Yunfei Qiao, Guangyao Zhao, Zhengkui Zhang, Xiaoyu Wang, Xuan State Grid Smart Grid Research Institute Co. Ltd State Key Laboratory of Advanced Power Transmission Technology Beijing China C-EPRI Electric Power Engineering Co. Ltd Beijing China

ISBN: (数字)9781665480796

ISBN: (纸本)9781665480796

As a flexible, zero-carbon, high-density energy carrier, hydrogen energy plays an important role in achieving carbon neutrality goals as medium or long-term high-power energy storage. Wind power and photovoltaic power (PV) generation integrated hydrogen storage equipment convert and utilize energy as fuel cells, it can alleviate PV and wind power curtailment condition effectively, which will reduce carbon emissions. Hydrogen production converter has decisive influence on of hydrogen production efficiency from water electrolysis. This paper present key parameter design method based on typical hydrogen production converter topology, in addition transformer leakage inductance and port capacitance in the topology circuit and their influence on the output ripple of the converter is studied combined with the simulation and prototype experimental results. Output ripple and loss analysis is also carried out to verify its performance. © 2022 IEEE.

关键词： Hydrogen production

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A Dead Time Compensation Method of Constant Common Mode Voltage CPS SPWM for MMC

A Dead Time Compensation Method of Constant Common Mode Volt...

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China Power Supply Society electromagnetic Compatibility Conference (CPEMC)

作者： Zuoxing Wang Hong Li Yanjun Li Daozhen He Zhichang Yang School of Electrical Engineering Beijing Jiaotong University Beijing China State Key Laboratory of Advanced Power Transmission Technology State Grid Smart Grid Research Institute Beijing China

ISBN: (数字)9798331509552

ISBN: (纸本)9798331509569

The modular multi-level converter (MMC) has demonstrated significant potential in high voltage direct current (HVDC) transmission and high voltage motor drive applications. Constant common mode voltage (CMV) modulations for MMC can effectively reduce the common mode (CM) electromagnetic interference (EMI) in MMC by minimizing CMV fluctuations to zero under ideal condition. However, the dead time required to protect power semiconductor devices in MMC seriously weakens the suppression effect of constant CMV modulations on CM EMI. This paper presents a method of dead time compensation with carrier phase compensation for MMC using constant CMV carrier phase shifted (CPS) sinusoidal pulse width modulation (SPWM). Phase compensation (PC) CPS SPWM is one of the constant CMV modulations for MMC. The operation principle of PC-CPS SPWM is introduced, and the mechanism of CMV fluctuations caused by dead time is analyzed. Compensation strategies for carrier phase positions and modulation signals in dead time compensation of PC-CPS SPWM are presented as DPC-CPS SPWM. The simulation results validate the proposed method, providing guidance for modulation design in MMC with low EMI requirements.

关键词： Multilevel converters Fluctuations Phase modulation Power supplies Simulation Switching frequency electromagnetic interference High-voltage techniques Pulse width modulation Power semiconductor devices

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Pouch-Like Reduced Graphene Oxide Material Induced by Radio Frequency Plasma with High Performance in electromagnetic Absorption

SSRN

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SSRN 2023年

作者： Lei, Xiaoting Song, Changkun Majeed, Muhammad Amjad Chen, Junhong Xu, Jianyong Shi, Wei Gu, Bonan Yu, Chunpei Cheng, He Zhang, Wenchao School of Chemistry and Chemical Engineering Nanjing University of Science and Technology Jiangsu Nanjing210094 China School of State Key Lab of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology HuBei Wuhan430074 China

The electromagnetic waves (EMW) protection holds utmost significance for advanced ‎communication technology and human health care. However, developing waves absorbing ‎materials with light weight, strong reflection loss, ultra-wide response bandwidth, and thin matched thickness certainly requires intricate process and considerable time costs. The radio frequency (RF) ‎plasma as an ultrafast and efficient technique investigated in the graphene oxide (GO) reduction ‎process and rGO as high-performance absorbing materials is procured. The plasma processing ‎effect on the permittivity and electromagnetic attenuation performance was studied by vector ‎network analyzer (VNA). The ten minutes plasma treated rGO sample achieved a notable ‎reflection loss (RL) of -44.59 dB at 4.89 GHz, with an absorption bandwidth of 3.64 GHz at a ‎thickness of 4.98 mm. The surge of reflection loss can be attributed to the unique and controllable ‎pouch-like structure exhibited by rGO-10 in RF plasma set conditions. This structure primarily ‎arises from the stress as a result of a significant reduction of oxygen-functionalized groups at the ‎edges of rGO fragments caused by electronically excited H atoms and ions generated in the ‎plasma. This work enables the high controllability of rGO structure toward high-performance ‎absorbing material based on the surface reaction processes via plasma. © 2023, The Authors. All rights reserved.

关键词： Bandwidth

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