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6th International Conference on Electronic Information Technology and Computer Engineering, EITCE 2022

作者： Zhao, Zhongwen Li, Guodong Lu, Di Key Laboratory of Complex Electronic System Simulation Space Engineering University Beijing China

ISBN: (纸本)9781450397148

In view of the problem that multifunctional hierarchy and dynamic characteristics are not considered simultaneously in the research methods of survivability of spatial information networks. This paper first summarizes the main methods of survivability research and three main attack strategies. Secondly, the idea of data flow and the method of time accumulation graph were integrated into the spatial information network model, and the multi-layer dynamic spatial network accumulation model was established. Finally, the navigation satellite network, communication satellite network and remote sensing satellite network are taken as examples to construct the spatial information network simulation plan, and the attack is carried out according to the three attack strategies, and the survivability of the spatial information network is analyzed. The experimental results verify the rationality of the proposed method and the effectiveness of the index, and explore the rules. © 2022 Association for Computing Machinery.

关键词： Satellites

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YOLO-based multi-class target detection for SAR images 7

YOLO-based multi-class target detection for SAR images

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7th IEEE Information Technology and Mechatronics Engineering Conference, ITOEC 2023

作者： Qiu, Linlin Zhu, Weigang Li, Yonggang Qiu, Lei Ma, Fanyin Space Engineering University Graduate School Beijing China Key Laboratory of Complex Electronic System Simulation China Space Engineering University Department of Electronics and Optical Engineering Beijing China

ISBN: (纸本)9798350334197

The current SAR image target detection mainly focuses on single category target detection problem in single task scenario, and no research has been conducted on multi-category target detection in different scenarios. YOLO is widely used in target detection tasks because of its speed and accuracy. In this paper, the YOLOv3, YOLOv5 and YOLOv8 algorithms, which have better detection performance and are more widely used, are used to perform target detection on the SAR image multi-category target detection dataset MSAR-1.0, and the detection results are analyzed from both the SAR image multi-category target detection dataset and the YOLO algorithm. © 2023 IEEE.

关键词： Synthetic aperture radar

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Dual-Polarized Wideband Wide-Beam Millimeter-Wave Magneto-Electric Dipole Antenna

Dual-Polarized Wideband Wide-Beam Millimeter-Wave Magneto-El...

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2023 Cross Strait Radio Science and Wireless Technology Conference, CSRSWTC 2023

作者： Gou, Linglong Ma, Jing Shi, Bin Zhu, Zhongbo Peng, Lin Guilin University of Electronic Technology Key Laboratory of Microwave and Optical Wave Application Technology Guangxi Guilin541004 China Beijing Simulation Center The Science and Technology on Special System Simulation Laboratory Beijing100854 China The National Key Laboratory of Science and Technology on Space Microwave Xi'an710100 China

ISBN: (纸本)9798350358971

In this manuscript, a dual-polarized wideband wide beamwidth magneto-electric (ME) dipole antenna for millimeter-wave mobile communication is proposed. As can be seen from the simulation results, this design exhibits excellent performance. Owing to the mutual resonances of the magnetic dipole and the electric dipole, large bandwidths of 64.8% and 59% (18.4 GHz-33 GHz and 17.29 GHz-33.9 GHz) are obtained for the two polarizations, respectively. The isolation between the two ports is greater than 25 dB. By loading metal vias, the antenna's beamwidth is widened to more than 100° through the whole operating band. The antenna size is 5mm×5 mm ×1.72 mm, and this compact structure is quite suitable for using in beam scanning antennas. © 2023 IEEE.

关键词： dual-polarization millimeter-wave (mm-wave) wideband

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Research on survivability analysis method of spatial information network based on dynamic cumulative model 22

Research on survivability analysis method of spatial informa...

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Proceedings of the 2022 6th International Conference on Electronic Information Technology and Computer Engineering

作者： Zhongwen Zhao Guodong Li Di Lu Key Laboratory of Complex Electronic System Simulation Space Engineering University China

ISBN: (纸本)9781450397148

关键词： Data flow idea Attack strategy Multi-layer dynamic spatial information network Anti-destroying ability

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Pattern Analysis and Placement Optimization of the Four-horn Monopulse for Terahertz Communication

Pattern Analysis and Placement Optimization of the Four-horn...

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2023 Cross Strait Radio Science and Wireless Technology Conference, CSRSWTC 2023

作者： Lu, Yong-Han Zhu, Zhong-Bo Ma, Jing Shi, Bin Zhang, Yu-Ting Peng, Lin Guilin University of Electronic Technology Key Laboratory of Microwave and Optical Wave Application Technology Guangxi Guilin541004 China National Key Laboratory of Science and Technology on Space Microwave Xi'an710100 China Beijing Simulation Center Science and Technology on Special System Simulation Laboratory Beijing100854 China School of Optoelectronic Engineering Guangxi Key Laboratory of Optoelectronic Information Processing Guilin University of Electronic Technology Guilin541004 China

ISBN: (纸本)9798350358971

The mobile node communication in terahertz monopulse system requires narrow beam to align with the mobile target precisely. In this paper, the radiation pattern of four-horn monopulse antenna is analyzed by use of the geometric optics (GO) and aperture field integration method (AFIM), and an efficient placement optimization to reduce the beamwidth of four-horn monopulse is presented. The optimization combines the genetic algorithm (GA) with GO-AFIM. The GA is employed to seek the optimal positions of the four horns, and the GO and AFIM are introduced into the fitness function of GA to evaluate the individual fitness. The optimization result has narrowed the beamwidth and enhanced gain of radiation pattern. Compared with the simulation in full wave software, the proposed method costs less time in pattern analysis and performs more efficiently in placement optimization. © 2023 IEEE.

关键词： aperture field integration method (AFIM) geometric optics (GO) placement optimization terahertz monopulse

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User-level failure detection and auto-recovery of parallel programs in HPC systems

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Frontiers of Computer Science 2021年第6期15卷 31-42页

作者： Guozhen ZHANG Yi LIU Hailong YANG Jun XU Depei QIAN State Key Laboratory of Software Development Environment Beijing 100191China Sino-German Joint Software Institute Beihang UniversityBeijing 100191China School of Computer Science and Engineering Beihang UniversityBeijing 100191China Science and Technology on Space System Simulation Laboratory Beijing Simulation Center Beijing 100854China

As the mean-time-between-failures(MTBF)continues to decline with the increasing number of components on large-scale high performance computing(HPC)systems,program failures might occur during the execution period with high *** successful execution of the HPC programs has become an issue that the unprivileged users should be *** the user perspective,if the program failure cannot be detected and handled in time,it would waste resources and delay the progress of program ***,the unprivileged users are unable to perform program state checking due to execution control by the job management system as well as the limited ***,automated tools for supporting user-level failure detection and autorecovery of parallel programs in HPC systems are *** paper proposes an innovative method for the unprivileged user to achieve failure detection of job execution and automatic resubmission of failed *** state checker in our method is encapsulated as an independent job to reduce interference with the user *** addition,we propose a dual-checker mechanism to improve the robustness of our *** implement the proposed method as a tool named automatic re-launcher(ARL)and evaluate it on the Tianhe-2 *** results show that ARL can detect the execution failures effectively on Tianhe-2 *** addition,the communication and performance overhead caused by ARL is *** good scalability of ARL makes it applicable for large-scale HPC systems.

关键词： high performance computing parallel program failure detection failure auto-recovery

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A Compact Antenna Test Range Designed by All-Dielectric Transmitarray

A Compact Antenna Test Range Designed by All-Dielectric Tran...

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International Conference on Microwave and Millimeter Wave Technology Proceedings

作者： Fan Liu Jing Ma Bin Shi Zhong-bo Zhu Lin Peng The Key Laboratory of Microwave and Optical Wave Application Technology Guilin University of Electronic Technology Guilin Guangxi China The Science and Technology on Special System Simulation Laboratory Beijing Simulation Center Beijing China The National Key Laboratory of Science and Technology on Space Microwave Xi'an China

ISBN: (数字)9798350389968

ISBN: (纸本)9798350389975

In this paper, an all-dielectric transmitarray compact antenna test range (TACATR) is proposed. The TACATR can be used as a low-cost alternative to traditional reflector compact antenna test range. The aperture perturbation mechanisms of the TACATR have been investigated, including aperture scattering interference and edge diffraction. Two optimization strategies are proposed to enhance the performance of the quiet zone (QZ). On the one hand, the unwanted edge diffraction is suppressed by employing suitable feeding sources and optimizing the focal aperture ratio (F/D). On the other hand, the interference of aperture scattering in QZ was further suppressed by optimizing the additional phase shift (APS). As an example, a Circular transmitarray (TA) with the dimension of 91mm was designed, which verifies the mechanism of interferences suppressing.

关键词： Microwave antennas Diffraction Horn antennas Perturbation methods Transmitting antennas Millimeter wave technology Scattering

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Ultra-wideband High Gain Circularly Polarized All Dielectric Lens Antenna

Ultra-wideband High Gain Circularly Polarized All Dielectric...

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International Conference on Microwave and Millimeter Wave Technology Proceedings

作者： Chen Wang Jing Ma Bin Shi Zhong-bo Zhu Lin Peng The Key Laboratory of Microwave and Optical Wave Application Technology Guilin University of Electronic Technology Guilin Guangxi China The Science and Technology on Special System Simulation Laboratory Beijing Simulation Center Beijing China The National Key Laboratory of Science and Technology on Space Microwave Xi'an China

ISBN: (数字)9798350389968

ISBN: (纸本)9798350389975

In this paper, An ultra-wideband high gain circularly polarized all dielectric lens antenna is proposed. The lens antenna consists a linearly polarized horn and a dielectric lens with a gap. The impedance bandwidth, axial ratio and gain of the antenna can be improved by changing the shape of the lens. The PSO-GA is used to improve the design optimization efficiency of lens antenna, and the modeling time is shortened through the integrated modeling technology. The impedance bandwidth of the lens antenna is 40%, the maximum axial ratio is 2.8dB, and the maximum gain is 21.5dBic at 65GHz. In the 60-90GHz frequency band, the gain is greater than 20.5dBic.

关键词： Microwave antennas Polarization Shape Horn antennas simulation Bandwidth Ultra wideband antennas

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Research and Implementation of Model Engineering Environment Integration Based on OpenMBEE 21st

Research and Implementation of Model Engineering Environment...

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21st Asia simulation Conference, AsiaSim 2022

作者： Xue, Junjie Zhou, Junhua Shi, Guoqiang Feng, Chaoqun Xu, Lin Liu, Penghua Quan, Hongyan Engineering Research Center Beijing Simulation Center Beijing100854 China State Key Laboratory of Intelligent Manufacturing System Technology Beijing Institute of Electronic System Engineering Beijing100854 China Science and Technology on Space System Simulation Laboratory Beijing Simulation Center Beijing100854 China Yunnan Chensheng Tendering Consulting Co. Ltd. Kuming650102 China School of Computer Science and Technology East China Normal University Shanghai200062 China

ISBN: (纸本)9789811991974

Aiming at the problem of integrating open tools in a user development environment in complex product design, an integration strategy of model engineering environment based on OpenMBEE is studied. It is based on the technologies of user identity unified authentication and user interaction data collaboration. Specifically, in the solution of unified identity authentication on cross-platform, the extended controller method is provided based on the message queue information flow mechanism. Then, the separation of business logic, data information, and interactive view of user unified authentication are realized, on the basis, that the function of unified identity authentication is realized by using the Software Development Kit (SDK) of OpenMBEE. Besides, in the study of user interaction data collaboration technology, three-layer collaboration mechanisms are proposed, they are the presentation layer collaboration, the business layer collaboration, and the persistence layer collaboration. When the jQuery programming framework is integrated into the bootstrap front-end framework, combing with the OpenMBEE back-end server interface, the collaboration of user interaction data is realized. Through experiments and project practice analysis, the user unified authentication strategy and user interactive collaboration strategy are tested respectively for proving the effectiveness and feasibility of the proposed method. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Authentication

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YOLO-based multi-class target detection for SAR images

YOLO-based multi-class target detection for SAR images

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IEEE Information Technology and Mechatronics Engineering Conference (ITOEC)

作者： Linlin Qiu Weigang Zhu Yonggang Li Lei Qiu Fanyin Ma Graduate School Space Engineering University Beijing China Key Laboratory of Complex Electronic System Simulation Department of Electronics and Optical Engineering Space Engineering University Beijing China

关键词：

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