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Reconfigurable Converter-Formed Soft Open Point- Assisted Dynamic Restoration for Distribution Systems with Cold-load Pickup

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IEEE Transactions on Sustainable Energy 2025年

作者： Yang, Xiaodong Li, Zihao Ding, Lijian Hu, Zhengli Fang, Hui Sun, Wei Wu, Qiuwei Wen, Jinyu Hefei University of Technology State Key Laboratory of High Efficiency and High Quality Electric Energy Conversion Hefei230009 China State Grid Anhui Ultra High Voltage Company Hefei230022 China Tsinghua University Tsinghua-Berkeley Shenzhen Institute Tsinghua Shenzhen International Graduate School Shenzhen518055 China Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Wuhan430074 China

Improving the power supply resilience under extreme conditions is an important construction goal faced by modern distribution systems (DSs). In this paper, we develop a dynamic restoration framework for renewable DSs with cold-load pickup (CLPU), assisted by the reconfigurable converter-formed multi-terminal soft open point (R-SOP) to minimize the de-energized loads and renewables curtailment under extreme weather events. Traditional SOP often designed as symmetric capacity topology, which may limit the DS restoration quality by the converter capacity of symmetric SOPs. To address this, a dynamic network reconfiguration model of DSs is established that embedded with R-SOP, whose typical feature is the asymmetric converter capacity design while keeping the total port capacity unchanged compared with traditional SOP. On this basis, a multi-period distribution service restoration model is formulated integrating the converter reconfiguration of R-SOP, DS topology changes and coordinated actions of flexible resources to enhance the restoration level and improve the renewable energy utilization. Moreover, restoration strategies that ignore the CLPU phenomenon may face remarkable gap from the realistic system operating conditions. Accordingly, a frequency-constrained dynamic restoration model is proposed in a faster-timescale to respond to the CLPU and restore the DS in a reliable and adaptable manner. Numerical simulations on two modified IEEE test systems and an actual distribution system verify the effectiveness of the developed framework. © 2010-2012 IEEE.

关键词： Restoration

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Self-Adaptive Reflectance Film for Passive Temperature Regulation in Diverse Environments

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advanced Science 2025年

作者： Yang, Shuo Tang, Sizhe Cai, Yufeng Ye, Zhiming Zou, Xiangbin Yuan, Xueyu Song, Yujie Li, Bing Tang, Dongyan Liu, Ming School of Chemistry and Chemical Engineering Harbin Institute of Technology Harbin150001 China State Key Laboratory of Special Functional Waterproof Materials Beijing Oriental Yuhong Waterproof Technology Co. Ltd Beijing101111 China Engineering Laboratory of Advanced Energy Materials Ningbo Institute of Materials Technology & Engineering Chinese Academy of Sciences Ningbo315201 China Advanced Energy Science and Technology Guangdong Laboratory Huizhou516000 China State Key Laboratory of Advanced Welding and Joining Harbin Institute of Technology Harbin150001 China

Passive thermal-regulation strategies have become increasingly important due to the strain alleviated on power grids for temperature management. Designing a system capable of automatically switching between cooling and heating modes in response to changing ambient conditions presents several specific challenges that engineers and researchers are actively addressing. In this research, a CaCl2 incorporated PNIPAM coated fluorinated poly(aryl ether) (FPAE) porous film with tunable reflectance is developed. The aim is to mitigate the reliance on active cooling systems, which consume significant amounts of energy. The moisture-temperature dual sensitive film exhibits a tunable reflectance range between 91.1% and 39.1% via phase change of the PNIPAM layer. Coupled with an infrared emissivity of 96.0%, a daytime cooling of 10 °C compared to the control experiment is achieved. Coating the film with a photothermal layer results in an adaptive Janus film that is capable of autonomous switching between heating and cooling, and demonstrates a heating of 22.5 °C in a cold environment. The facile preparation method, excellent cyclic stability, mechanical properties, and UL-94 V-0 rating enable promising applications of the smart film under diverse living environments. © 2025 The Author(s). advanced Science published by Wiley-VCH GmbH.

关键词： Self tuning control systems

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Epigenetics in the modern era of crop improvements

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Science China Life Sciences 2025年

作者： Yan Xue Xiaofeng Cao Xiangsong Chen Xian Deng Xingwang Deng Yong Ding Aiwu Dong Chengguo Duan Xiaofeng Fang Lei Gong Zhizhong Gong Xiaofeng Gu Chongsheng He Hang He Shengbo He Xinjian He Yan He Yuehui He Guifang Jia Danhua Jiang Jianjun Jiang Jinsheng Lai Zhaobo Lang Chenlong Li Qing Li Xingwang Li Bao Liu Bing Liu Xiao Luo Yijun Qi Weiqiang Qian Guodong Ren Qingxin Song Xianwei Song Zhixi Tian Jiawei Wang Yuan Wang Liang Wu Zhe Wu Rui Xia Jun Xiao Lin Xu Zhengyi Xu Wenhao Yan Hongchun Yang Jixian Zhai Yijing Zhang Yusheng Zhao Xuehua Zhong Daoxiu Zhou Ming Zhou Yue Zhou Bo Zhu Jiankang Zhu Qikun Liu College of Life Sciences Institute of Life Science and Green Development Hebei University Biotechnology Research Institute Chinese Academy of Agricultural Sciences College of Biology Hunan Key Laboratory of Plant Functional Genomics and Developmental Regulation Hunan Engineering and Technology Research Center of Hybrid Rapeseed Hunan University Institute of Advanced Agricultural Sciences School of Advanced Agricultural Sciences Peking University State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources Guangdong Laboratory for Lingnan Modern Agriculture South China Agricultural University National Institute of Biological Sciences Key Laboratory of Seed Innovation Institute of Genetics and Developmental Biology Chinese Academy of Sciences School of Advanced Agricultural Sciences Peking-Tsinghua Center for Life Sciences Peking University Synthetic and Functional Biomolecules Center Beijing National Laboratory for Molecular Sciences Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education College of Chemistry and Molecular Engineering Peking University Key Laboratory of Seed Innovation State Key Laboratory of Plant Genomics and National Center for Plant Gene Research Institute of Genetics and Developmental Biology Chinese Academy of Sciences State Key Laboratory of Wheat Improvement Peking University Institute of Advanced Agricultural Sciences Shandong Laboratory of Advanced Agricultural Sciences in Weifang State Key Laboratory of Crop Stress Adaptation and Improvement School of Life Sciences Henan University State Key Laboratory of Maize Bio-breeding National Maize Improvement Center Department of Plant Genetics and Breeding China Agricultural University Frontiers Science Center for Molecular Design Breeding China Agricultural University Center for Crop Functional Genomics and Molecular Breeding China Agricultural University Sanya Institute of China Agricultural University Hainan Yazhou Bay Seed Laboratory Institute of Advan

Epigenetic mechanisms are integral to plant growth, development, and adaptation to environmental stimuli. Over the past two decades,our comprehension of these complex regulatory processes has expanded remarkably, producing a substantial body of knowledge on both locus-specific mechanisms and genome-wide regulatory patterns. Studies initially grounded in the model plant Arabidopsis have been broadened to encompass a diverse array of crop species, revealing the multifaceted roles of epigenetics in physiological and agronomic traits. With recent technological advancements, epigenetic regulations at the single-cell level and at the large-scale population level are emerging as new focuses. This review offers an in-depth synthesis of the diverse epigenetic regulations, detailing the catalytic machinery and regulatory functions. It delves into the intricate interplay among various epigenetic elements and their collective influence on the modulation of crop traits. Furthermore, it examines recent breakthroughs in technologies for epigenetic modifications and their integration into strategies for crop improvement. The review underscores the transformative potential of epigenetic strategies in bolstering crop performance, advocating for the development of efficient tools to fully exploit the agricultural benefits of epigenetic insights.

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Research on the burst failure analysis method of type IV cylinders based on the fiber strength reduction effect

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Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica 2025年第5期42卷 2567-2582页

作者： Li, Ruiqi Hu, Haixiao Li, Shuxin Chen, Hongda Cao, Dongfeng Liu, Hao Zheng, Kaidong Zhang, Yu Liu, Rui State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China National Energy Key Laboratory for New Hydrogen-ammonia Energy Technologies Foshan Xianhu Laboratory Foshan528200 China School of Science Wuhan University of Technology Wuhan430070 China School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China General Research and Development Institute China FAW Co. Changchun130000 China

Composite material hydrogen storage cylinders are the most effective solution for high-pressure gaseous hydrogen storage. The carbon fiber fully wrapped plastic liner cylinder (Type IV cylinder) is the most important potential in the development of hydrogen storage. Accurately predicting the burst pressure and failure mode of type IV cylinders is basement for the lightweight design of these cylinders. Current burst failure prediction methods are developed base on traditional laminated structural models, where the influence of fiber bundles cross undulation that occurs during the helical winding process are not considered. This paper comprehensively investigated the influence of fiber bundles cross undulation on the fiber strength by combining numerical and experimental approaches, and a failure prediction method which takes into account of the strength knock-down effect was developed for type IV cylinders. The burst pressures and failure locations of three different types of IV cylinders were predicted and compared with the ones that predicted by traditional method which does not consider the strength knock-down effect. The physical bursting experiments were conducted, and the results validate that the numerical analysis method considering the strength knock-down effect can give more accurate prediction of the failure location and reduce the prediction error of the bursting pressure, the maximum error is reduced from +15.42% to +6.07%. © 2025 Beijing University of Aeronautics and Astronautics (BUAA). All rights reserved.

关键词： Convergence of numerical methods

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Electrochemically and chemically in-situ interfacial protection layers towards stable and reversible Zn anodes

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Science Bulletin 2025年第1期70卷 104-124页

作者： Yuqing Yang Liping Qin Qiong He Chengjie Yin Yongpeng Lei Shuquan Liang Guozhao Fang School of Materials Science and Engineering Key Laboratory of Electronic Packaging and Advanced Functional Materials of Hunan ProvinceCentral South UniversityChangsha 410083China College of Biological and Chemical Engineering Guangxi University of Science and TechnologyNanning 545006China School of Chemical and Blasting Engineering Anhui University of Science and TechnologyHuainan 232001China State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China National Energy Metal Resources and New Materials Key Laboratory Central South UniversityChangsha 410083China

Aqueous zinc metal batteries(AZMBs)have received widespread attention for large-scale sustainable energy storage due to their low toxicity,safety,***,the technology and industrialization of AZMBs are greatly plagued by issues of Zn anode such as persistent dendrites and parasitic side reactions,resulting in rapid capacity degradation or battery *** or chemically in-situ interfacial protection layers have very good self-adaption features for stability and reversibility of Zn anodes,which can also be well matched to current battery ***,the in-situ interfacial strategies are far from the practical design for effective Zn ***,a targeted academic discussion that serves the development of this field is very ***,the comprehensive insights on electrochemically and chemically in-situ interfacial protection layers for Zn anode were proposed in this *** showcased a systematic summary of research advances,followed by detailed discussions on electrochemically and chemically in-situ interfacial protection *** importantly,several crucial issues facing in-situ interfacial protection strategies have been further put *** final section particularly highlighted a systematic and rigorous scheme for precise designing highly stable and reversible in-situ interface for practical zinc anodes.

关键词： In-situ strategy Interfacial layer Zn anode Solid electrolyte interphase Aqueous zinc metal batteries

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Integration of Electrical Properties and Polarization Loss Modulation on Atomic Fe–N‑RGO for Boosting electromagnetic Wave Absorption

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Nano-Micro Letters 2025年第2期17卷 517-532页

作者： Kaili Zhang Yuefeng Yan Zhen Wang Guansheng Ma Dechang Jia Xiaoxiao Huang Yu Zhou State Key Laboratory of Precision Welding&Joining of Materials and Structures Harbin Institute of TechnologyHarbin 150001People’s Republic of China School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001People’s Republic of China MIIT Key Laboratory of Advanced Structural‑Functional Integration Materials&Green Manufacturing Technology Harbin Institute of TechnologyHarbin 150001People’s Republic of China

Developing effective strategies to regulate graphene’s conduction loss and polarization has become a key to expanding its application in the electromagnetic wave absorption(EMWA)*** on the unique energy band structure of graphene,regulating its bandgap and electrical properties by introducing heteroatoms is considered a feasible ***,metal-nitrogen doping reduced graphene oxide(M–N-RGO)was prepared by embedding a series of single metal atoms M–N_(4) sites(M=Mn,Fe,Co,Ni,Cu,Zn,Nb,Cd,and Sn)in RGO using an N-coordination atom-assisted *** composites had adjustable conductivity and polarization to optimize dielectric loss and impedance matching for efficient EMWA *** results showed that the minimum reflection loss(RL_(min))of Fe–N-RGO reaches−74.05 dB(2.0 mm)and the maximum effective absorption bandwidth(EAB_(max))is 7.05 GHz(1.89 mm)even with a low filler loading of only 1 wt%.Combined with X-ray absorption spectra(XAFS),atomic force microscopy,and density functional theory calculation analysis,the Fe–N_(4) can be used as the polarization center to increase dipole polarization,interface polarization and defect-induced polarization due to d-p orbital hybridization and structural ***,electron migration within the Fe further leads to conduction loss,thereby synergistically promoting energy *** study demonstrates the effectiveness of metal-nitrogen doping in regulating the graphene′s dielectric properties,which provides an important basis for further investigation of the loss mechanism.

关键词： electromagnetic wave absorption Fe-N-RGO Dipole polarization Conduction loss Impedance matching

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The difference in anti-corrosion effect between the addition of La and Ce of a B10 alloy

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Journal of Materials Research and technology 2025年 36卷 8062-8074页

作者： Peiyou Du Tianyu Chen Guoliang Xie Qiaoqiao Wang Xinhua Liu State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing No. 30 Xueyuan Road Beijing 100083 China Key Laboratory for Advanced Materials Processing of Ministry of Education Institute of Advanced Materials and Technology University of Science and Technology Beijing Beijing 100083 China Institute of Materials Genome Engineering Henan Academy of Sciences Zhengzhou 450046 China

Microalloying with rare earth elements is an effective method to improve the corrosion resistance of Cu–Ni alloys. The study of the effect of different rare earth elements on the corrosion resistance and corrosion behavior is significant for the optimization of Cu–Ni alloy composition. In this paper, the effect of La and Ce on the corrosion behavior of B10 alloy in 3.5 wt% NaCl solution was investigated separately, utilizing both electrochemical techniques and surface characterization methods. The results indicate that B10-0.1 wt% La alloy and B10-0.1 wt% Ce alloy have better corrosion resistance performance compared to Cu–10Ni alloy in NaCl solution. The better corrosion resistance performance of the B10-0.1 wt% La and B10-0.1 wt% Ce alloy could be mainly attributed to the preferential deposition of rare-earth oxides that promotes heterogeneous nucleation of the passive film. Furthermore, the deposition degree of La 2 O 3 is greater than that of Ce 2 O 3 during the early stage of immersion which leads to the superior corrosion resistance of the B10-0.1 wt% La alloy.

关键词： B10 alloy Rare earth elements Passivation film Corrosion resistance

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Zonotope-based fault estimation for Lipschitz nonlinear systems 3

Zonotope-based fault estimation for Lipschitz nonlinear syst...

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2024 3rd International Conference on Aerospace and Control engineering, ICoACE 2024

作者： Ma, Siyuan Zhang, Wei Jiang, Qiang Gao, Sheng School of Automatic and Electrical Engineering Shenyang Ligong University Shenyang110158 China State Key Laboratory of Robotics Shenyang Institute of Automation Chinese Academy of Sciences Shenyang110016 China China-Portugal Belt and Road Joint Laboratory on Space & Sea Technology Advanced Research Shanghai200120 China

An estimation of fault intervals using a T-N-L structured observer is suggested for Lipschitz nonlinear systems. By augmenting state vectors, the augmentation system and its observer are established, enabling the observer to concurrently estimate fault and system states. The L∞ performance is applied to enhance the resilience of the fault interval estimation to external disturbances and unanticipated inputs. An adequate requirement for the observer design is also presented. The interval estimation of states and faults is ultimately created by using a zonotope. The proposed method exhibits advantages and feasibility when compared to existing simulation techniques. © 2025 Institute of Physics Publishing. All rights reserved.

关键词： Nonlinear systems

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Minimum Steady-state Fault Current of GridForming Inverters With Virtual Impedance-Based Current Limiting Caused by Active Power Control

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IEEE Transactions on Power Electronics 2025年

作者： Liu, Tao Shi, Xiaojie Yan, Jianan Wang, Zhiqiang Yin, Tianxiang Lin, Lei State Key Laboratory of Advanced Electromagnetic Technology School of Electrical and Electronic Engineering Wuhan430074 China Imperial College London Energy Futures Lab Control and Power Group Electrical and Electronic Engineering Department LondonSW7 2AZ United Kingdom

Fault current limiting based on virtual impedance (VI) has been widely utilized in grid-forming (GFM) inverters. The VI magnitude is generally designed to its maximum value under the worst case, which reduces the point of common coupling (PCC) voltage magnitude to limit the steady-state fault current. However, this letter reveals that due to the constraints imposed by the active power control during the steady state, as the PCC voltage magnitude decreases, its phase angle increases, which has been ignored. The opposite effects of VI on the PCC voltage magnitude and phase angle lead to a minimum steady-state fault current that is independent of VI. During severe grid voltage sags, this minimum steady-state fault current can exceed the current limit, making the effective fault current limiting impossible by using VI alone. This finding provides new insights into the steady-state analysis and control optimization of GFM inverters. Experimental results validate the theoretical findings. © 1986-2012 IEEE.

关键词： Grid-forming control minimum steady-state fault current virtual impedance (VI)- based current limiting

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Achieving enhanced thermoelectric and mechanical performance in p-type bismuth telluride through constrained hot deformation

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Ceramics International 2025年

作者： Chen, Quansheng Ji, Chen Yu, Jian Hua, Lin Zhao, Wenyu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China School of Automotive Engineering Wuhan University of Technology Wuhan430070 China School of Materials Science and Engineering Jiujiang University Jiujiang332005 China Hubei Key Laboratory of Advanced Technology for Automobile Components Wuhan University of Technology Wuhan430070 China

Bi2Te3-based alloys remain the only commercially available thermoelectric (TE) materials. However, their practical applications are severely constrained by the inferior mechanical performance of the zone melting (ZM) ingot. Herein, a simple constrained hot deformation (CHD) technology was developed to prepare the p-type Bi0.5Sb1.5Te3 polycrystalline materials derived from ZM ingots. It was discovered that the deformation process has negligible impact on the phase composition, but can efficiently refine the grains to approximately 5 μm through the dynamic recrystallization and simultaneously introduce high-density dislocations. Although the donor-like effect induced by deformation would obviously deteriorate the electrical conductivity, the recovery effect triggered by high deformation temperature can effectively optimize the carrier concentration and thus alleviate the degradation of power factor. The material deformed at 773 K maintains a relatively high power factor ∼3.33 mW K−2 m−1 at 300 K, together with a significantly decreased lattice thermal conductivity ∼0.59 W m−1 K−1, and an improved zT ∼1.1 was obtained ultimately. More importantly, the deformed materials show a significant improvement in mechanical performance due to the grain refinement. A maximum average Vickers hardness of 0.67 GPa was achieved for the material deformed at 723 K, which is ∼40 % higher than that of the ZM ingot. Our work indicates the simple CHD is an efficient technology to synergistically enhance both TE and mechanical properties of Bi2Te3-based ZM ingot. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Polycrystalline materials

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