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第41届中国控制会议

作者： Chenrong Long Peng Liu Qinglei Hu School of Automation Science and Electrical Engineering Beihang University National Key Laboratory of Science and Technology on Test Physics & Numerical Mathematics Beijing Institute of Space Long March Vehicle School of Automation Science and Electrical Engineering Beihang UniversityBeijing 100191China.

ISBN: (数字)9789887581536

ISBN: (纸本)9781665482561

Ellipse fitting is to estimate the parameters of the ellipse from a set of coplanar points,but the geometric distance from the plane point to the elliptic curve is difficult to calculate *** paper proposes a neural network optimization-based algorithm to estimate the geometric distances from plane points to elliptic curves to solve the ellipse fitting ***,the neural network is firstly applied to train the geometric distance between the plane point and the standard ellipse,and then obtain the geometric distance between the plane point and the general ellipse through the rotation and translation ***,use minimizing the sum of the Euclidean distances from the plane point to the elliptic curve as the objective function,and finally use the gradient descent method to iteratively solve the ellipse ***,the proposed method avoids the direct algebraic solution of the geometric distance from the plane point to the elliptic curve and the performance of the algorithm to gether with its robustness to noise are analysed via numerical simulation.

关键词： Ellipse Fitting Coplanar Points Geometric Distance Neural Network Optimization

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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...

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

Near-field Measurement Method for Electromagnetic Scattering...

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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 New Criterion For Optimization Of Total Variation Denoising

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

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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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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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The Effects of Base Shape on Cone Scattering Feature

The Effects of Base Shape on Cone Scattering Feature

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

作者： Shui, Yongtao Zhang, Shengjun Song, Hang Mu, Lei Zhang, Xianglin Zhang, Yuning Cui, Yichun Wang, Weidong Wang, Mingliang Cai, Ligen Xu, Yinfang Chai, Song Liu, Jiaqi Dong, Chao Wang, Fengju Yong, Zhengyu Shao, Chunshou Wang, Minghao Qi, Zhaohui Sun, Yuan Sun, Chenxin Beijing Institute of Space Long March Vehicle Beijing China National Key Laboratory of Science & Technology on Test Physics and Numerical Mathematics Beijing China Institute of Survival Technology Effectiveness Evaluation of Flying Vehicle Beijing China

ISBN: (纸本)9781665452366

Recent days, radar cross section reduction(RCSR) of objects have attracted much interest as more and more wideband radar were used to detect low observable weapon platforms. Among the low observation technologies, shaping plays an important role. This paper focused on the effect of basement shape on the scattering of a cone-like object, and some basement shape better for low radar cross section design for around tip incident angle were analyzed. © 2022 IEEE.

关键词： Radar cross section

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Deterministic and complete hyperentangled Bell states analysis assisted by frequency and time interval degrees of freedom

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Frontiers of physics 2022年第5期17卷 149-157页

作者： Xin-Jie Zhou Wen-Qiang Liu Hai-Rui Wei Yan-Bei Zheng Fang-Fang Du School of Mathematics and Physics University of Science and Technology BeijingBeijing 100083China Center for Quantum Technology Research and Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurements(MOE) School of PhysicsBeijing Institute of TechnologyBeijing 100081China Science and Technology on Electronic Test and Measurement Laboratory North University of ChinaTaiyuan 030051China

Hyperentangled Bell states analysis(HBSA)is an essential building block for certain hyper-parallel quantum information *** propose a complete and deterministic HBSA scheme encoded in spatial and polarization degrees of freedom(DOFs)of two-photon system assisted by a fixed frequency-based entanglement and a time interval *** parity information the spatial-based and polarization-based hyper-entanglement can be distinguished by the distinct time intervals of the photon pairs,and the phase information can be distinguished by the detection *** with previous schemes,the number of the auxiliary entanglements is reduced from two to one by introducing time interval ***,the additional frequency and time interval DOFs suffer less from the collective channel noise.

关键词： hyperentangled Bell states analysis multiple degrees of freedom time interval

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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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Dynamic failure of aramid paper honeycomb under intermediate strain rate loading

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Thin-Walled Structures 2025年 215卷

作者： Chen, Meiduo Zhang, Xianglin Xu, Songlin Ma, Hao Yuan, Liangzhu Xie, Yushan Zhang, Xiaoman Wang, Pengfei University of Science and Technology of China Department of Modern Mechanics CAS Key Laboratory for Mechanical Behavior and Design of Materials Anhui Hefei230027 China Beijing Institute of Space Long March Vehicle Beijing100076 China National Key Laboratory of Science and Technology on Test Physics and Numerical Mathematics Beijing100076 China

Investigation of the transformation process of failure mechanism for materials and structures under intermediate strain rate loading is of great significance. To achieve intermediate strain rate loading, a novel experimental technique is proposed using a high-speed-rotating eccentric cam to compress the specimen. The particle velocities and the stresses at both ends of the specimen are measured by the velocity interferometer system for any reflector (VISAR) and by the semiconductor strain gauges, respectively. The paper honeycomb specimens with four thicknesses (i.e. 2 mm, 3 mm, 5 mm, and 10 mm) are tested under strain rates ranging from 0.1 to 15 s-1. Local deformation evolution in the specimen is captured based on high-speed photography and analyzed by the digital image correlation method (DIC). The deformation under intermediate strain rate loading is distinguished by higher particle velocity and lower particle acceleration, which is different from those under the static compression (at lower strain rates) and the Split Hopkinson Pressure bar (SHPB) impacting (at higher lower strain rates). Based on the DIC results, the abnormal size effect of specimen 2 mm is due to the competition between in-plane shear failure and out-of-plane buckling. The theoretical model is then established by introducing two main parameters, i.e. the lateral weakening factor ξ and the dynamic parameter k, to describe respectively the effects of in-plane shearing and strain rate on the out-of-plane wall buckling, and the critical stress for specimen buckling is obtained. The results show that the buckling deformation and the half-wave number for buckling are sensitive to the two parameters. This work provides theoretical and experimental references for the study of thin-walled structures under intermediate strain rate. © 2025 Elsevier Ltd

关键词： Fracture mechanics

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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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