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Publisher Correction: Fine structures of a solar type III radio bursts observed with LOFAR(Acta Geophysica, 10.1007/s11600-024-01421-4)

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Acta Geophysica 2024年第1期73卷 1021-1022页

作者： Dabrowski, Bartosz Wolowska, Aleksandra Vocks, Christian Magdalenić, Jasmina Zhang, Peijin Flisek, Pawel Bröse, Malte Morosan, Diana E. Krankowski, Andrzej Fron, Adam Mann, Gottfried Zucca, Pietro Bisi, Mario Fallows, Richard Gallagher, Peter Marqué, Christophe Matyjasiak, Barbara Rothkaehl, Hanna Space Radio-Diagnostics Research Centre University of Warmia and Mazury R. Prawochenskiego 9 Olsztyn10-719 Poland Leibniz-Institut für Astrophysik Potsdam An der Sternwarte 16 PotsdamD-14482 Germany Center for mathematical Plasma Astrophysics KU Leuven Leuven3001 Belgium Royal Observatory of Belgium Ukkel Brussels1180 Belgium Center for Solar-Terrestrial Research New Jersey Institute of Technology NewarkNJ United States Cooperative Programs for the Advancement of Earth System Science University Corporation for Atmospheric Research BoulderCO United States Zentrum für Astronomie und Astrophysik Technische Universität Berlin Hardenbergstraße 36 Berlin10623 Germany Department of Physics and Astronomy University of Turku Turku20014 Finland ASTRON – The Netherlands Institute for Radio Astronomy Oude Hoogeveensedijk 4 Dwingeloo7991 PD Netherlands RAL Space United Kingdom Research and Innovation - Science and Technology Facilities Council - Rutherford Appleton Laboratory Harwell Campus OxfordshireOX11 0QX United Kingdom School of Cosmic Physics Dublin Institute for Advanced Studies 31 Fitzwilliam Place Dublin 2D02 PN40 Ireland Space Research Center of the Polish Academy of Sciences Bartycka 18a Warsaw00-716 Poland

This article unfortunately contained mistakes. The affiliation details for Author Peter Gallagher were incorrectly given as ‘School of Cosmic Physics, Dublin Institute for Advanced Studies, 31 Fitzwilliam Place, Dublin 2 D02 PN40, Ireland’ but should have been ‘School of Cosmic Physics, Dublin Institute for Advanced Studies, 31 Fitzwilliam Place, Dublin 2, D02 PN40, Ireland’. Following references were incorrect: Chen L, Ma B, Wu D et al (2021) An interplanetary type IIIb radio burst observed by parker solar probe and its emission mechanism. Astrophys J Lett 915(1):L22. https://***/10.3847/2041-8213/ac0b43 Jebaraj IC, Krasnoselskikh V, Pulupa M et al (2023) Fundamental-harmonic pairs of interplanetary Type III radio bursts. Astrophys J Lett 955(1):L20. https://***/10.3847/2041-8213/acf857 Melnik VN, Rucker HO, Konovalenko AA et al (2008) Solar Type IV bursts at frequencies 10–30 MHz. Nova science Publishers, New York, pp 287–325 Melnik VN, Konovalenko AA, Rucker HO et al (2011) Observations of Powerful Type III bursts in the frequency range 10–30 MHz. Sol Phys 269(2):335–350. https://***/10.1007/s11207-010-9703-4 van Haarlem MP, Wise MW, Gunst AW et al (2013) LOFAR: the LOw-frequency ARray. Astron Astrophys 556:A2. https://***/10.1051/0004-6361/201220873 Wild JP (1950) Observations of the spectrum of high-intensity solar radiation at metre wavelengths. II. outbursts. Aust J Sci Res A Phys Sci 3(3):399–408. https://***/10.1071/CH9500399 Wild JP (1950) Observations of the spectrum of high-intensity solar radiation at metre wavelengths. III. isolated bursts. Aust J Sci Res A Phys Sci 3:541. https://***/10.1071/CH9500541 Wild JP, McCready LL (1950) Observations of the spectrum of high-intensity solar radiation at metre wavelengths. I. the apparatus and spectral types of solar burst observed. Aust J Sci Res A Phys Sci 3:387. https://***/10.1071/CH9500387 Zhang P, Zucca P, Kozarev K et al (2022) Imaging of the quiet sun in the frequency range of

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Ultrawideband Dual-polarized Magneto-electric Dipole Antenna With High Isolation

Ultrawideband Dual-polarized Magneto-electric Dipole Antenna...

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Cross Strait Quad-Regional Radio science and Wireless technology Conference (CSRWTC)

作者： Yongmao Wang Liangliang Zhao Jiaping Hou Mingxuan Zheng Chuwei Li Aidong Li Chufeng Hu Tao Ma Huiling Zhao School of Electronics and Information Northwestern polytechnical university (NPU) Xi'an China AVIC SHAANXI AERO ELECTRIC CO. LTD System Engineering Division Xi'an Electronic Engineering Research Institute Xi'an China China Academy of Space Technology (CAST) Beijing China Science and Technology on UAV Laboratory Northwestern Polytechnic University (NPU) Xi'an China The 43rd Research Institute of CETC Hefei China

ISBN: (数字)9798331507794

ISBN: (纸本)9798331507800

In this manuscript, an ultrawideband (UWB) dual-polarized magneto-electric (ME) dipole antenna with high isolation was presented which consists of a crossed ME dipole, two orthogonal arch-shaped feeding probes and eight groups of parasitic resonant units loaded on the hexagonal floor. The parasitic resonant units loaded around the main radiator of the antenna realize the impedance matching at lower frequencies, introducing a resonance point to enable the antenna to operate at lower frequencies. Besides, by etching crossed rectangular slots on the electric dipoles, the current path is effectively extended, allowing the antenna to operate at higher frequencies. Concurrently, by using orthogonal arch-shaped feeding probes, high isolation is achieved. As a result, the simulation results indicate that the designed antenna achieves an impedance bandwidth of 110.82%, ranging from 1.03 to 3.59 GHz with a high isolation of better than 31.7 dB.

关键词： Dipole antennas simulation Magnetoelectric effects Magnetic resonance Antenna feeds Ultra wideband antennas Impedance Probes Loaded antennas Floors

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Research Artifacts in Software Engineering Publications: Status and Trends

arXiv

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arXiv 2024年

作者： Liu, Mugeng Huang, Xiaolong He, Wei Xie, Yibing Zhang, Jie M. Jing, Xiang Chen, Zhenpeng Ma, Yun Ministry of Education School of Computer Science Peking University Beijing China School of Software and Microelectronics Peking University Beijing China Department of Informatics King’s College London London United Kingdom National Key Laboratory of Data Space Technology and System Beijing China School of Computer Science and Engineering Nanyang Technological University Singapore Singapore Institute for Artificial Intelligence Peking University Beijing China

The Software Engineering (SE) community has been embracing the open science policy and encouraging researchers to disclose artifacts in their publications. However, the status and trends of artifact practice and quality remain unclear, lacking insights on further improvement. In this paper, we present an empirical study to characterize the research artifacts in SE publications. Specifically, we manually collect 1,487 artifacts from all 2,196 papers published in top-tier SE conferences (ASE, FSE, ICSE, and ISSTA) from 2017 to 2022. We investigate the common practices (e.g., URL location and format, storage websites), maintenance activities (e.g., last update time and URL validity), popularity (e.g., the number of stars on GitHub and characteristics), and quality (e.g., documentation and code smell) of these artifacts. Based on our analysis, we reveal a rise in publications providing artifacts. The usage of Zenodo for sharing artifacts has significantly increased. However, artifacts stored in GitHub tend to receive few stars, indicating a limited influence on real-world SE applications. We summarize the results and provide suggestions to different stakeholders in conjunction with current guidelines. © 2024, CC BY.

关键词： Software engineering

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Generative AI-Enhanced Cooperative MEC of UAVs and Ground Stations for Unmanned Surface Vehicles

arXiv

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arXiv 2025年

作者： You, Jiahao Jia, Ziye Dong, Chao Wu, Qihui Han, Zhu The Key Laboratory of Dynamic Cognitive System of Electromagnetic Spectrum Space Ministry of Industry and Information Technology Nanjing University of Aeronautics and Astronautics Jiangsu Nanjing211106 China National Mobile Communications Research Laboratory Southeast University Jiangsu Nanjing211111 China Department of Electrical and Computer Engineering University of Houston HoustonTX77004 United States Department of Computer Science and Engineering Kyung Hee University Seoul446-701 Korea Republic of

The increasing deployment of unmanned surface vehicles (USVs) require computational support and coverage in applications such as maritime search and rescue. Unmanned aerial vehicles (UAVs) can offer low-cost, flexible aerial services, and ground stations (GSs) can provide powerful supports, which can cooperate to help the USVs in complex scenarios. However, the collaboration between UAVs and GSs for USVs faces challenges of task uncertainties, USVs trajectory uncertainties, heterogeneities, and limited computational resources. To address these issues, we propose a cooperative UAV and GS based robust multi-access edge computing framework to assist USVs in completing computational tasks. Specifically, we formulate the optimization problem of joint task offloading and UAV trajectory to minimize the total execution time, which is in the form of mixed integer nonlinear programming and NP-hard to tackle. Therefore, we propose the algorithm of generative artificial intelligence-enhanced heterogeneous agent proximal policy optimization (GAI-HAPPO). The proposed algorithm integrates GAI models to enhance the actor network ability to model complex environments and extract high-level features, thereby allowing the algorithm to predict uncertainties and adapt to dynamic conditions. Additionally, GAI stabilizes the critic network, addressing the instability of multi-agent reinforcement learning approaches. Finally, extensive simulations demonstrate that the proposed algorithm outperforms the existing benchmark methods, thus highlighting the potentials in tackling intricate, cross-domain issues in the considered scenarios. © 2025, CC BY.

关键词： Unmanned surface vehicles

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Coalition Formation for Heterogeneous Federated Learning Enabled Channel Estimation in RIS-assisted Cell-free MIMO

arXiv

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arXiv 2025年

作者： Qi, Nan Liu, Haoxuan Tsiftsis, Theodoros A. Boulogeorgos, Alexandros-Apostolos A. Zhou, Fuhui Jin, Shi Wu, Qihui Key Laboratory of Dynamic Cognitive System of Electromagnetic Spectrum Space Ministry of Industry and Information Technology Nanjing University of Aeronautics and Astronautics Nanjing210016 China Department of Informatics and Telecommunications University of Thessaly Lamia35100 Greece Department of Electrical and Computer Engineering University of Western Macedonia Kozani50100 Greece National Mobile Communications Research Laboratory Frontiers Science Center for Mobile Information Communication and Security Southeast University Nanjing210096 China

Downlink channel estimation remains a significant bottleneck in reconfigurable intelligent surface-assisted cell-free multiple-input multiple-output communication systems. Conventional approaches primarily rely on centralized deep learning methods to estimate the high-dimensional and complex cascaded channels. These methods require data aggregation from all users for centralized model training, leading to excessive communication overhead and significant data privacy concerns. Additionally, the large size of local learning models imposes heavy computational demands on end users, necessitating strong computational capabilities that most commercial devices lack. To address the aforementioned challenges, a coalition-formation-guided heterogeneous federated learning (FL) framework is proposed. This framework leverages coalition formation to guide the formation of heterogeneous FL user groups for efficient channel estimation. Specifically, by utilizing a distributed deep reinforcement learning (DRL) approach, each FL user intelligently and independently decides whether to join or leave a coalition, aiming at improving channel estimation accuracy, while reducing local model size and computational costs for end users. Moreover, to accelerate the DRL-FL convergence process and reduce computational burdens on end users, a transfer learning method is introduced. This method incorporates both received reference signal power and distance similarity metrics, by considering that nodes with similar distances to the base station and comparable received signal power have a strong likelihood of experiencing similar channel fading. Massive experiments performed that reveal that, compared with the benchmarks, the proposed framework significantly reduces the computational overhead of end users by 16%, improves data privacy, and improves channel estimation accuracy by 20%. © 2025, CC BY.

关键词： Federated learning

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A Low-profile Ultrawideband Dual-polarized TCDA

A Low-profile Ultrawideband Dual-polarized TCDA

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Cross Strait Quad-Regional Radio science and Wireless technology Conference (CSRWTC)

作者： Liangliang Zhao Aidong Li Chufeng Hu Chuwei Li Mingxuan Zheng Hailiang Zhu Tao Ma Yongmao Wang Jiaping Hou Huiling Zhao School of Electronics and Information Northwestern polytechnical university (NPU) Xi'an China Science and Technology on UAV Laboratory Northwestern Polytechnic University (NPU) Xi'an China China Academy of Space Technology (CAST) Beijing China System Engineering Division Xi'an Electronic Engineering Research Institute Xi'an China The 43rd Research Institute of CETC Hefei China AVIC SHAANXI AERO ELECTRIC CO. LTD

ISBN: (数字)9798331507794

ISBN: (纸本)9798331507800

In this work, a low-profile dual-polarized tightly coupled dipole array antenna is proposed based on the multi-notch balun and the planar metasurface design. Through the simulation analysis, the antenna realizes the ultra bandwidth of 1.4-13.2 GHz, and the impedance characteristics matches greatly. Finally, the performance of this design is validated by the finite 5x5 tightly coupled array and the specific analysis is listed.

关键词： Wireless communication Dipole antennas Baluns Bandwidth Metasurfaces Impedance Antenna arrays Ultra wideband technology

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嫦娥五号月壤中首次发现蒸发沉积成因的蓝辉铜矿

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science Bulletin 2023年第7期68卷 723-729页

作者：郭壮李琛李阳吴炎学朱晨曦文愿运法文哲李雄耀刘建忠欧阳自远 Institute of Remote Sensing and Geographical Information System School of Earth and Space SciencesPeking UniversityBeijing 100871China Center for Lunar and Planetary Sciences Institute of GeochemistryChinese Academy of SciencesGuiyang 550081China Faculty of Metallurgical and Energy Engineering Kunming University of Science and TechnologyKunming 650093China Center for Excellence in Comparative Planetology Chinese Academy of SciencesHefei 230026China Analysis and Test Center Guangdong University of TechnologyGuangzhou 510006China State Key Laboratory of High Performance Ceramics and Superfine Microstructures Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China

由于缺乏磁场和大气的保护,月球表面持续受到陨石和微陨石的轰击.撞击引起的气化沉积作用是月表典型的改造过程,该过程往往伴随独特矿物相的产生(如纳米金属铁以及铁硅化合物).研究团队通过对嫦娥五号月壤进行细致的扫描电子显微镜观察... 详细信息

由于缺乏磁场和大气的保护,月球表面持续受到陨石和微陨石的轰击.撞击引起的气化沉积作用是月表典型的改造过程,该过程往往伴随独特矿物相的产生(如纳米金属铁以及铁硅化合物).研究团队通过对嫦娥五号月壤进行细致的扫描电子显微镜观察,在纯铁颗粒以及玻璃质表面发现了具有典型气相沉积特征的含铜组分,进一步通过透射电子显微镜以及电子能量损失谱确认了这些含铜沉积物为蓝辉铜矿这是首次在月壤中发现此类矿物.本研究提供了月表硫化物发生气化沉积的直接证据,揭示了月表撞击过程引起的气相组分迁移及其对月表物质的显著改造效应.同时,嫦娥五号月壤中蓝辉铜矿的发现进一步拓宽了人们对月表复杂矿物组成的认识.

关键词： Vapor deposition Chang’e-5 lunar soil Digenite Impact ejecta

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Light-emitting field-effect transistors with EQE over 20%enabled by a dielectric-quantum dots-dielectric sandwich structure

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science Bulletin 2022年第5期67卷 529-536,M0004页

作者： Lingmei Kong Jialong Wu Yunguo Li Fan Cao Feijiu Wang Qianqian Wu Piaoyang Shen Chengxi Zhang Yun Luo Lin Wang Lyudmila Turyanska Xingwei Ding Jianhua Zhang Yongbiao Zhao Xuyong Yang Key Laboratory of Advanced Display and System Applications of Ministry of Education Shanghai UniversityShanghai 200072China CAS Key Laboratory of Crust-Mantle Materials and Environments School of Earth and Space SciencesUniversity of Science and Technology of ChinaHefei 230026China Henan Key Laboratory of Photovoltaic Materials Henan UniversityKaifeng 475004China Faculty of Engineering University of NottinghamNottingham NG72RDUK Center for Optoelectronic Engineering Research Department of PhysicsSchool of Physics and AstronomyYunnan UniversityKunming 650091China

Emerging quantum dots(QDs)based light-emitting field-effect transistors(QLEFETs)could generate light emission with high color purity and provide facile route to tune optoelectronic properties at a low fabrication *** efforts have been devoted to designing device structure and to understanding the underlying physics,yet the overall performance of QLEFETs remains low due to the charge/exciton loss at the interface and the large band offset of a QD layer with respect to the adjacent carrier transport ***,we report highly efficient QLEFETs with an external quantum efficiency(EQE)of over 20%by employing a dielectric-QDs-dielectric(DQD)sandwich *** DQD structure is used to control the carrier behavior by modulating energy band alignment,thus shifting the exciton recombination zone into the emissive ***,enhanced radiative recombination is achieved by preventing the exciton loss due to presence of surface traps and the luminescence quenching induced by interfacial charge *** DQD sandwiched design presents a new concept to improve the electroluminescence performance of QLEFETs,which can be transferred to other material systems and hence can facilitate exploitation of QDs in a new type of optoelectronic devices.

关键词： Light-emitting field-effect transistors Quantum dots Electroluminescence External quantum efficiency

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On-board Time-varying Topology Self Prediction Routing Network Communication technology

On-board Time-varying Topology Self Prediction Routing Netwo...

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International Conference on Advanced Infocomm technology (ICAIT)

作者： Jiyang Yu Dan Huang Nan Wu Jinyang Li Wenjie Li Xianjie Wang China Academy of Space Technology Beijing Institute of Spacecraft System Engineering Beijing China China Research & Development Academy of Machinery Equipment Chongqing University of Technology Chongqing China Beijing Institute of Computer Technology and Applications Fangzhou Key Technology Laboratory Beijing China Beijing Blackstone Matrix Technology Co. LTD Chongqing Feima Innovation Research Institute Chongqing China College of Computer Science and Engineering Chongqing University of Technology Chongqing China

Facing the difficulties of large-scale networked satellite communication, such as unstable topology, diversified channel types, and uncertain satellite link failure, this paper proposes a general optimal routing path calculation method based on historical data prediction, and establishes a Statistical model based on historical data prediction for inter satellite communication transmission, which is not limited to transient failures caused by aging energy, storage, and load. At the same time, in the process of calculating the transmission rate and packet loss rate of the communication link, historical data is introduced to form a channel rate function that changes over time, which is used to achieve communication prediction within the transmission time and achieve self-sensing of the communication link's state. Based on the self-prediction state of the communication link, combined with the domain search algorithm, the maximum probability optimal solution of the long-term interactive routing process is considered to achieve real-time optimal solution for data transmission in the constellation of Jupiter in orbit. A simulation verification was conducted for a large number of randomly distributed routing applications in a short period of time, and parameters such as link stability, load capacity, and business time delay were compared with previous designs. The results show that the proposed method has good stability, which is more than 10% higher than previous designs; The link load is significantly lower compared to previous designs; Under the condition of a large number of routing applications, the service delay has been reduced by 27% compared to previous designs, ensuring routing communication under the time-varying topology of the constellation group.

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Radiative forcing reduced by early twenty-first century increase in land albedo

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Nature 2025年第8065期641卷 1162-1171页

作者： Zhengyang Hou Liqiang Zhang Jingjing Peng Giovanni Forzieri Aolin Jia Zhiqiang Xiao Ying Qu Jintai Lin Duoying Ji Zidong Zhu Xin Yao Shuwen Peng Lanpu Zhao Wenjie Fan Zhaocong Wu Hao Geng Qihao Wang Chenghu Zhou Suhong Liu Liangpei Zhang State Key Laboratory of Remote Sensing and Digital Earth Faculty of Geographical Science Beijing Normal University Beijing China. State Key Laboratory of Remote Sensing and Digital Earth Faculty of Geographical Science Beijing Normal University Beijing China. zhanglq@***. Aerospace Information Research Institute Henan Academy of Sciences Zhengzhou China. zhanglq@***. Earth System Science Interdisciplinary Center/Cooperative Institute for Satellite Earth System Studies (CISESS) University of Maryland College Park MD USA. Department of Civil and Environmental Engineering University of Florence Florence Italy. Remote Sensing and Natural Resource Modeling Department ERIN Luxembourg Institute of Science and Technology Belvaux Luxembourg. Laboratory for Climate and Ocean-Atmosphere Studies Department of Atmospheric and Oceanic Sciences School of Physics Peking University Beijing China. linjt@***. Institute of Carbon Neutrality Peking University Beijing China. linjt@***. Aerospace Information Research Institute Henan Academy of Sciences Zhengzhou China. School of Earth and Space Sciences Peking University Beijing China. State Key Laboratory of Resources and Environmental Information System Institute of Geographical Science and Natural Resources Chinese Academy of Sciences Beijing China. zhouch@***. Aerospace Information Research Institute Henan Academy of Sciences Zhengzhou China. zlp62@***.

Surface albedo greatly affects how much energy the Earth absorbs. Intensive human activities and accelerated climate change have altered surface albedo across spatial and temporal scales, yet assessments of the effects of land use or land cover (LULC) and snow variations on land surface albedo are scarce at the global scale. As a result, the global land surface albedo dynamics over recent decades and their corresponding radiative forcing to the climate system remain poorly understood. Here we quantify the individual and combined effects of snow cover dynamics, LULC conversions and non-conversion regions on albedo variations during 2001-2020 and estimate their induced radiative forcing. We show that the negative radiative forcing induced by the global land surface albedo change was -0.142 (-0.158, -0.114) W m over the past two decades. The global snow-free land surface albedo increased by 2.2% (P < 0.001), with a negative radiative forcing of -0.164 (-0.186, -0.138) W m (P < 0.001). The magnitude of this negative forcing is sevenfold larger than the positive forcing induced by snow dynamics, and equivalent to 59.9% of that caused by CO emissions from 2011 to 2019. The global radiative forcing due to albedo changes in LULC non-conversion regions is 3.9 to 8.1 times greater than that from LULC conversions. The radiative forcing induced by albedo changes highlights the important role of land surface dynamics in modulating global warming.

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