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共 238 条记录，以下是51-60 订阅

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Individual Identification Algorithm of Known Emitters Based on Lightweight Binary Channels Neural Network 12

Individual Identification Algorithm of Known Emitters Based ...

引用

12th International Conference on Information technology in Medicine and Education, ITME 2022

作者： Gao, Jingpeng Song, Xia Gao, Lu Harbin Engineering University College of Information and Communication Engineering Harbin China Beijing Institute of Space Long March Vehicle National Key Laboratory of Science and Technology on Test Physics and Numerical Mathematics Beijing China

ISBN: (纸本)9798350310153

Aiming at the problem that the traditional specific emitter identification method has poor feature extraction ability and limited recognition effect, this paper proposes a known specific emitter identification algorithm based on the LBCNet (the Lightweight Binary Channels Net). The algorithm uses bispectrum and cyclic spectrum to highlight the unintentional information in the pulse. Then, it combines the idea of depthwise separable convolution to design the LBCNet to realize adaptive feature extraction, fusion, and classification. Finally, it integrates the attention mechanism to highlight the effective information of the image, enhance the neural network's learning ability and improve the identification performance of specific emitters. The simulation results show that the recognition rate of the proposed algorithm is as high as 94.53% at 0dB, which has good engineering practical value and can be applied to the field of electronic reconnaissance. © 2022 IEEE.

关键词： Convolution

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A Binary Sparrow-Hybridized Beluga Whale Optimization Algorithm for Jamming Task Assignment 6

A Binary Sparrow-Hybridized Beluga Whale Optimization Algori...

引用

6th IEEE International Conference on Electronic Information and Communication technology, ICEICT 2023

作者： Shen, Chen Gao, Jingpeng Jiang, Zhiye Zhang, Tianran Chen, Geng College of Information and Communication Engineering Harbin Engineering University Harbin150050 China Beijing Institute of Space Long March Vehicle National Key Laboratory of Science and Technology on Test Physics and Numerical Mathematics Beijing China Beijing Institute of Electronic System Engineering Beijing100854 China

ISBN: (纸本)9798350399059

In the context of non-cooperative electronic countermeasures, the problem of formulating effective jamming task assignments arises due to insufficient collaborative jamming resources. This paper proposes a binary sparrow- hybridized beluga whale optimization algorithm based on jamming task assignments. The algorithm combines the binary sparrow search algorithm(BSSA) and the binary beluga whale optimization(BBWO), which is set with multi-dimensional constraints in the time, frequency and spatial domains. To achieve the optimal strategy for collaborative interference task assignment, a fitness function is constructed using both radar coverage and the signal-to-jamming ratio received by each radar. When the number of UAVs is 7 and the number of radars is 10, the simulation results show that the optimization speed and accuracy of the proposed algorithm are significantly higher than the BSSA and BBWO. Therefore, the algorithm has good coverage and performance in the field of jamming task assignments. © 2023 IEEE.

关键词： Optimization

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A New Criterion For Optimization Of Total Variation Denoising

A New Criterion For Optimization Of Total Variation Denoisin...

引用

International Applied Computational Electromagnetics Society Symposium (ACES)

作者： Feng Xue Xia Ai Lu Gao Jiaqi Liu National Key Laboratory of Science and Technology on Test Physics and Numerical Mathematics Beijing China

Based on Chambolle’s algorithm, we develop a data-driven optimization scheme based on minimization of Stein’s unbiased risk estimate (SURE)—statistically equivalent to mean squared error (MSE). We propose a recursive evaluation of SURE to monitor the estimation error during Chambolle’s iteration; the optimal value is then identified by the minimum SURE. We exemplify the proposed methods with 1-D signal denoising.

关键词： Estimation error Deconvolution Noise reduction Minimization Computational electromagnetics Signal denoising Optimization

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Near-field Measurement Method for Electromagnetic Scattering of Electrically Large-scale Plasma

Near-field Measurement Method for Electromagnetic Scattering...

引用

International Applied Computational Electromagnetics Society Symposium (ACES)

作者： Jiaqi Liu Lu Gao Runhui Wu Xia Ai Song Chai Xin Liu Shengjun Zhang Yichun Cui National Key Laboratory of Science and Technology on Test Physics & Numerical Mathematics Beijing China

In the near-field test environment of 01500×3300mm vacuum vessel with low electromagnetic scattering, the relative measurement method is used, that is, the results of electrically large-scale plasma radar cross s... 详细信息

关键词： Radar cross-sections Volume measurement Standards organizations Electromagnetic scattering Elementary particle vacuum Energy measurement Plasma measurements

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A High Temperature Resistant Broadband Metamaterial Absorber

A High Temperature Resistant Broadband Metamaterial Absorber

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International Applied Computational Electromagnetics Society Symposium (ACES)

作者： Yinfang Xu Jiaqi Liu Lu Gao Xia Ai National Key Laboratory of Science and Technology on Test Physics & Numerical Mathematics Beijing Institute of Space Long March Vehicle Beijing China

Based on high temperature resistant silicon dioxide(SiO 2 ) and silicon carbide(SiC) materials, a high temperature resistant broadband meta material absorber was designed in this paper. The absorber consists of two layers of SiC pattern, three layers of $\text{SiO}_{2}$ transmission medium, and a bottom layer of low resistance SiC thin film reflection layer. The simulation results show that the absorption rate of the absorber exceeds 90% in the frequency range of 3.46-18.37GHz, and the relative absorption bandwidth is 136.6%. The absorber device also has the characteristics of low process implementation difficulty, polarization insensitivity, and wide-angle absorption. Therefore, it has potential application value in fields such as radar imaging, stealth, and communication technology.

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Dual-Frequency Vortex Beam Generation Using Coding Metasurface

Dual-Frequency Vortex Beam Generation Using Coding Metasurfa...

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2022 International Applied Computational Electromagnetics Society Symposium, ACES-China 2022

作者： Li, Junfeng Kong, Xianglin Wang, Fengjun Miao, Zhuowei Wang, Xiaoyi Shen, Xiaopeng Zhang, Shengjun Zhao, Lei China University of Mining and Technology School of Information and Control Engineering Xuzhou China National Key Laboratory of Science and Technology on Test Physics & Numerical Mathematical Beijing China Polytechnique Montreal Department of Electrical Engineering MontrealQC Canada China University of Mining and Technology School of Materials Science and Physics Xuzhou China

ISBN: (纸本)9781665452366

This paper presents a dual-frequency coding metasurface (CM) for vortex beam generation. The metasurface unit cell is realized with two symmetric metal layers separated by a dielectric substrate. Each metal layer consists of an outer square ring, a middle square ring, and an inner rhombus patch. Two out-of-phase transmitting states in two bands are achieved by rotating the inner rhombus patch by 90 °. Two 1 = + 2 vortex beams are then realized in two different bands by properly distributing the two states on the metasurface aperture. A metasurface with 30 × 30 elements is designed, simulated, and experimentally demonstrated. The experimental results agree well with the simulating ones, showing that the metasurface achieves a high transforming efficiency in both Ku (13.6-14.8GHz) band and Ka (26.7-27.7 GHz) band. © 2022 IEEE.

关键词： Kurchatovium

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Source-Configured Microwave Plasmonic Vortices Based on Single Meta-Particle

Source-Configured Microwave Plasmonic Vortices Based on Sing...

引用

International Applied Computational Electromagnetics Society Symposium (ACES)

作者： Xianglin Kong Lei Zhao Xiaopeng Shen Yinfang Xu School of Information and Control Engineering School of Materials Science and Physics China University Mining and Technology Xuzhou China National Key Laboratory of Science and Technology on Test Physics & Numerical Mathematics Beijing China

In this paper, generation of plasmonic vortices with tunable topologic charges is proposed in the microwave regime. Tunable vortices with topologic charges of 0, +1 and -1 can be configured by illuminating incident plane waves with linearly polarization (LP), left-circularly polarization (LHCP) and right-circularly polarization (RHCP) on a single meta-particle, respectively. A spiral meta-particle operating at 2.94 GHz is designed, fabricated and measured to demonstrate the source-configured characteristics. The results showed that simulation and test are consistent with the theoretical ones.

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Theoretical Simulation and Experimental Analysis of Electromagnetic Wave Propagation characteristics in Sub-dense Nonuniform Plasma 4

Theoretical Simulation and Experimental Analysis of Electrom...

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4th International Applied Computational Electromagnetics Society Symposium in China, ACES-China 2021

作者： Wu, Runhui Liu, Jiaqi Chai, Song Meng, Gang Li, Yanan Cui, Yichun Beijing Institute of Space Long March Vehicle National Key Laboratory of Science and Technology on Test Physics Numerical Mathematics Beijing China

In this paper, reflection, absorption and transmission characteristics of 1-50GHz frequency electromagnetic wave by the sub-dense heterogeneous plasma are studied by combining theoretical modeling and simulation with ... 详细信息

ISBN: (纸本)9781733509619

关键词： Computation theory

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Radar Cross Section Measurement Method of Inhomogeneous Plasma with Electrically Large Scale Based on Near-field Imaging 4

Radar Cross Section Measurement Method of Inhomogeneous Plas...

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4th International Applied Computational Electromagnetics Society Symposium in China, ACES-China 2021

作者： Wu, Runhui Liu, Jiaqi Chai, Song Meng, Gang Mo, Jinjun Xu, Yinfang Bai, Wenhao Fang, Wenwu Beijing Institute of Space Long March Vehicle National Key Laboratory of Science and Technology on Test Physics Numerical Mathematics Beijing China China Academy of Launch Vehicle Technology National Key Laboratory of Science and Technology on Test Physics Numerical Mathematics Beijing China School of Information and Communication Guilin University of Electronic Technology Guangxi Guilin China

ISBN: (纸本)9781733509619

In this paper, the vacuum and low electromagnetic scattering experiment device with spatial scales Phi 4000 times 8000 mm was introduced. The electromagnetic scattering characteristics experiment of non-uniform argon plasma was studied by using the far field extrapolation scattering center near field imaging method. The experimental results are shown that the difference of the test results is less than 2dB for the non-uniform distribution of argon plasma. © 2021 Applied Computational Electromagnetics Society (ACES).

关键词： Radar cross section

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Full-Space Beam Scanning Antenna Based on Spoof Surface Plasmon Polaritons

Full-Space Beam Scanning Antenna Based on Spoof Surface Plas...

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International Applied Computational Electromagnetics Society Symposium (ACES)

作者： Zhicheng Wu Xianglin Kong Jun Wang Ruofeng Xu Lei Zhao Yinfang Xu School of Information and Control Engineering China University of Mining and Technology Xuzhou China National Key Laboratory of Science and Technology on Test Physics & Numerical Mathematics Beijing China

In this paper, a full-space beam scanning antenna based on spoof surface plasmon polaritons (SSPPs) is proposed. The proposed antenna is composed of a SSPPs loaded by the varactor diodes and periodic metallic patches. The periodic patches can transform the slow waves from SSPPs into fast waves, and the cutoff frequency can be reconfigured by changing the capacitance of the varactor diode, which will make the radiation angle of the beam change within a fixed frequency. Simulation results show that the radiation angle ranges from −90° to 90° at 9 GHz.

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