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Distributed multi-target tracking with labeled multi-Bernoulli filter considering efficient label matching

Frontiers of Information technology & Electronic Engineering 2025年第3期26卷 400-414页

作者： Changwen DING Chuntao SHAO Siteng ZHOU Di ZHOU Runle DU Jiaqi LIU School of Astronautics Harbin Institute of TechnologyHarbin 150001China National Key Laboratory of Science and Technology on Test Physics and Numerical Mathematics Beijing 100076China

We propose a distributed labeled multi-Bernoulli(LMB)filter based on an efficient label matching *** distributed LMB filter fusion has the premise that the labels among local densities have already been ***,considering that the label space of each local posterior is independent,such a premise is not practical in many *** achieve distributed fusion practically,we propose an efficient label matching method derived from the divergence of arithmetic average(AA)mechanism,and subsequently label-wise LMB filter fusion is performed according to the matching *** with existing label matching methods,this proposed method shows higher performance,especially in low detection probability ***,to guarantee the consistency and completeness of the fusion outcome,the overall fusion procedure is designed into the following four stages:pre-fusion,label determination,posterior complement,and uniqueness *** performance of the proposed label matching distributed LMB filter fusion is demonstrated in a challenging nonlinear bearings-only multi-target tracking(MTT)scenario.

关键词： Distributed multi-sensor multi-target tracking Labeled multi-Bernoulli filter Arithmetic average fusion Label matching

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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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Characteristic Mode Design of Dual-Band Reconfigurable Frequency Selective Surface

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Chinese Journal of Electronics 2022年第6期31卷 1129-1137页

作者： NING Zihao LI Mengmeng DING Dazhi AI Xia LIU Jiaqi Department of Communication Engineering Nanjing University of Science and Technology National Key Laboratory of Science and Technology on Test Physics and Numerical Mathematics

In this paper, a characteristic mode design of dual-band reconfigurable frequency selective surface(RFSS) with transmission/reflection band is presented. Through the visualization of modal behavior, the theory of characteristic modes(TCM) is used to guide design from a physical perspective. At first, the dominant modes of two basic structures that have a major impact on reflection are clarified by observing the modal *** appropriate combination of the two structures forms an initial element with bandpass properties. Then, the positive-intrinsic-negative(PIN) diode is placed in the middle of the microstrip line and as the state shifts from ON to OFF, the dominant mode resonant frequency of the microstrip line shifts upward. Such a feature can be used to design the transmission/reflection RFSS. Experimentally, a dual-band RFSS operating at 8.8 GHz and 10.4 GHz is designed and fabricated. The measured results that agree with the full-wave simulation validate the proposed TCM-based design.

关键词： dual-band reconfigurable frequency selective surface dual-band RFSS positive-intrinsic-negative diode theory of characteristic modes characteristic mode design full-wave simulation transmission band p-i-n diodes modal behavior visualization bandpass properties microstrip lines microstrip line dominant mode resonant frequency PIN diode microwave filters frequency selective surfaces TCM-based design reflection band transmission RFSS microwave diodes band-pass filters microstrip filters reflection RFSS

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Low-overlap square aperture ptychography with selective scanning

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Optics and Laser technology 2025年 190卷

作者： Qiao, Ziling Wen, Xiu Chen, Hang Huang, Guancheng Zhou, Xuyang Li, Ziyang Ji, Yu Liu, Wei Chi, Dazhao Gao, Bin Liu, Shutian Xue, Feng Liu, Zhengjun Li, Yutong School of Physics Harbin Institute of Technology Harbin 150001 China School of Physical Science and Technology Tiangong University Tianjin 300387 China School of Space Information Space Engineering University Beijing 101416 China Optical Imaging Laboratory Harbin Institute of Technology Shenzhen 518055 China National Key Laboratory of Precision Welding & Joining of Materials and Structures Harbin Institute of Technology Harbin 150001 China College of Data Science and Technology Heilongjiang University Harbin 150080 China National Key Laboratory of Science and Technology on Test Physics and Numerical Mathematics Beiiing 100076 China

As an excellent representative of coherent diffraction imaging, ptychography iterative engine plays a crucial role in biomedical imaging and crystal structure analysis. However, the significant challenges regarding imaging speed and throughput have hindered its development in fast imaging. In this paper, we propose a fast square aperture reconstruction method with a low-overlap rate aimed at mitigating the issue of low efficiency. Our approach, employing the Tamura coefficient of gradient (TOG) operator-guided strategy with square aperture, surpasses the performance of previous initial iterations. Enhanced imaging quality is demonstrated by intentionally selecting patterns in the reconstruction stage. Our results illustrate that a high-overlap rate and extensive patterns are no longer indispensable for lensless ptychography. © 2025 Elsevier Ltd

关键词： Coherent diffraction imaging Computational imaging Phase retrieval Ptychography

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Characteristic Mode Analysis for Thin Dielectric Sheets with Alternative Surface Integral Equation

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Chinese Journal of Electronics 2022年第6期31卷 1181-1188页

作者： JIA Chunlai HE Zi DING Dazhi GUAN Ling AI Xia LIU Jiaqi CHEN Xuewen Department of Communication Engineering Nanjing University of Science and Technology Science and Technology on Electromagnetic Scattering Laboratory Beijing Institute of Environmental Features National Key Laboratory of Science and Technology on Test Physics and Numerical Mathematics School of Physics and Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology

When the dielectric sheet is electrically thin in the normal direction, the conventional volume integral equation(VIE) can be approximately simplified to the surface one. On this basis, a novel surface integral equation-based formulation is presented for analyzing characteristic mode(CM) of thin dielectric sheets. The resultant CMs are expressed with tangential and normal components of electric volume currents, which are more intuitive than the conventional VIE-based one. Due to the application of volume equivalence principle, the proposed formulation is immune to non-physical modes. The CMs of typical thin dielectric bodies, including the dielectric substrate and radome, are analyzed to show that the proposed formulation is computationally efficient with encouraging accuracy.

关键词： normal components alternative surface integral equation thin dielectric sheets normal direction electric volume currents dielectric sheet radome radomes dielectric bodies surface integral equation-based formulation volume equivalence principle thin dielectric bodies tangential components nonphysical modes electromagnetic wave scattering conventional volume integral equation integral equations characteristic mode analysis dielectric substrate

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The role of single loading dielectric layer on properties of Frequency Selective Surfaces

The role of single loading dielectric layer on properties of...

引用

International Workshop on Metamaterials (Meta)

作者： Zhang, S. J. Liu, J. Q. Wang, M. L. Ms, W. M. Liang, W. Liu, X. M. Hou, X. C. National Key Laboratory of Science and Technology on Test Physics & Numerical Mathematics

ISBN: (纸本)9781467328081

Frequency selective surfaces (FSS) have attracted researchers from many subjects for decades for its tempting applications such as for radome radar cross section (RCS) reduction, sub-reflector, et. al. Many studies was focused on different type FSS, such as unit shape, dielectric loading, layers of FSS. And it is of popular consideration that double dielectric loading on both sides of FSS be an ideal configuration. In this paper, the type of single side loading, which is more similar to the practical configuration, was studied with the numerical method. And it is found that both the thickness of thick loading layer and the constant of the thin substrate play key roles to the properties of FSS.

关键词： frequency selective surfaces loading LOADING dielectric layer side load numerical methods sidings

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Topology Optimization of Complex Network based on NSGA-II 4

Topology Optimization of Complex Network based on NSGA-II

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4th IEEE Advanced Information technology, Electronic and Automation Control Conference, IAEAC 2019

作者： Bin, Zhang Gan, Zhi-Chun Wen, Chen Hu, Qiang-Qiang Hou, Jian-Feng National University of Defense Technology Departments of Information and Communication China Science and Technology on Test Physics Numerical Mathematic Laboratory China

ISBN: (纸本)9781728119076

This paper proposes a complex network topology optimization method based on NSGA-II with degrees and edges number unchanged. The method selects the elite parent networks by applying non-dominated layer sorting and congestion degree calculation through the network crossover and mutation operation to achieve maximum network efficiency and network invulnerability. Simulation analysis shows that the method can significantly improve the invulnerability and network efficiency of the initial networks at the same time. Optimizing the network efficiency makes the network connection show a negative correlation. The network presents a "multi-core decentralized" structure;optimizing the network invulnerability makes the connection show a positive correlation, the network presents a "close core and scattered periphery" structure;the cooperative optimization makes the network present a "tighter core and large periphery" structure, which is proved with good theoretical generality and practical application value. © 2019 IEEE.

关键词： Complex networks

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Systematic centroid error compensation for the simple Gaussian PSF in an electronic star map simulator

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Chinese Journal of Aeronautics 2014年第4期27卷 884-891页

作者： Wang Haiyong Wang Yonghai Li Zhifeng Song Zhenfei School of Astronautics Beihang University Beijing Institute of Space Long March Vehicle National Key Laboratory of Science and Technology on Test Physics & Numerical Mathematics

Simulated star maps serve as convenient inputs for the test of a star sensor, whose standardability mostly depends on the centroid precision of the simulated star image, so it is necessary to accomplish systematic error compensation for the simple Gaussian PSF（or SPSF, in which PSF denotes point spread function）. Firstly, the error mechanism of the SPSF is described, the reason of centroid deviations of the simulated star images based on SPSF lies in the unreasonable sampling positions（the centers of the covered pixels） of the Gaussian probability density function. Then in reference to the IPSF simulated star image spots regarded as ideal ones, and by means of normalization and numerical fitting, the pixel center offset function expressions are got, so the systematic centroid error compensation can be executed simply by substituting the pixel central position with the offset position in the SPSF. Finally, the centroid precision tests are conducted for the three big error cases of Gaussian radius r = 0.5, 0.6, 0.671 pixel, and the centroid accuracy with the compensated SPSF（when r = 0.5） is improved to 2.83 times that of the primitive SPSF, reaching a 0.008 pixel error, an equivalent level of the IPSF. Besides its simplicity, the compensated SPSF further increases both the shape similarity and the centroid precision of simulated star images, which helps to improve the image quality and the standardability of the outputs of an electronic star map simulator（ESS）.

关键词： Error compensation Image analysis Point spread function Star map simulation Star sensor

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Double-stage Metamodel and Its Application in Aerodynamic Design Optimization

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Chinese Journal of Aeronautics 2011年第5期24卷 568-576页

作者： ZHANG Dehu GAO Zhenghong HUANG Likeng WANG Mingliang National Key Laboratory of Science and Technology on Aerodynamic Design and Research Northwestern Polytechnical University Xi＇an 710072 China National Key Laboratory of Science and Technology on Test Physics ＆ Numerical Mathematical Beijing 100076 China

Constructing metamodel with global high-fidelity in design space is significant in engineering design. In this paper, a double-stage metamodel （DSM） which integrates advantages of both interpolation metamodel and regression metamodel is constructed. It takes regression model as the first stage to fit overall distribution of the original model, and then interpolation model of regression model approximation error is used as the second stage to improve accuracy. Under the same conditions and with the same samples, DSM expresses higher fidelity and represents physical characteristics of original model better. Besides, in order to validate DSM characteristics, three examples including Ackley function, airfoil aerodynamic analysis and wing aerodynamic analysis are investigated, In the end, airfoil and wing aerodynamic design optimizations using genetic algorithm are presented to verify the engineering applicability of DSM.

关键词： optimization genetic algorithm double-stage metamodel Kriging BP neural network Latin hypercube Parsecmethod

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Experimental Studies of Low-Pressure Plasma Jet by Means of Langmuir Probes and Emission Spectra

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Plasma science and technology 2009年第3期11卷 307-313页

作者：刘磊曹金祥牛田野王亮孟刚刘鑫袁雷邬润辉张生俊任爱民 Key Laboratory of Basic Plasma Physics Chinese Academy of Sciencesand Department of Modern PhysicsUniversity of Science and Technology of China China Academy of Space Technology Test Physics & Numerical Mathematics Laboratory

An investigation was made into the argon plasma jet that expanded in a low-pressure vacuum chamber. The spatial distributions of the parameters of the plasma jet with different supplied powers were measured using a ten-channel Langmuir probe array. The chemical species in the plasma jet were identified by emission spectroscopy. The electron excitation temperatures at two positions, 10 cm and 50 cm downstream from the nozzle exit were calculated, respectively, by the Boltzmann plot method.

关键词： plasma jet spatial distribution probe array emission spectrum

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