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Cooperative Guidance Law Design for Simultaneous Attack with Multiple Missiles Against a Maneuvering Target

Journal of systems science & Complexity 2018年第1期31卷 287-301页

作者： ZHOU Jialing Lü Yuezu LI Zhongkui YANG Jianying Ministerial Key Laboratory of ZNDY School of Mechanical Engineering Nanjing University of Science and Technology Nanjing 210094 China National Defense Key Laboratory of Science and Technology on Electromagnetic Scattering the 802 Institute of Shanghai Academy of Space Flight Technology the Eighth Academy of China Aerospace Science and Technology Corporation Shanghai 200090 China State Key Laboratory for Turbulence and Complex Systems Department of Mechanics and Engineering Science College of Engineering Peking University Beijing 100871 China

This paper considers the simultaneous attack problem of multiple missiles against a maneuvering target. Different from most of the existing literature in which the simultaneous attack problem is formulated as a consensus problem of missiles＇ time-to-go estimates, this paper formulates it as the consensus problem of missiles＇ ranges-to-go. Based on this strategy, novel distributed guidance laws are proposed to solve the simultaneous attack problem with the target of unknown *** control method is introduced to estimate the upper bound of the target＇s acceleration. The effectiveness of the proposed guidance laws is verified both theoretically and numerically.

关键词： consensus problem distributed control guidance law design simultaneous attack

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Hyperspectral image denoising base on adaptive sparse representation 3

Hyperspectral image denoising base on adaptive sparse repres...

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3rd IEEE International Conference on Data science in Cyberspace, DSC 2018

作者： Song, Xiaorui Wu, Lingda Hao, Hongxing Graduate School Space Engineering University Beijing China Science and Technology on Complex Electronic System Simulation Laboratory Space Engineering University Beijing China

ISBN: (纸本)9781538642108

The hyperspectral image(HSI) generated by most imaging spectrometer systems is constantly disturbed by noise. In this research, we introduced an HSI denoising method based on the theory of sparse coding extended to the spectral domain. The algorithm employs variable separation method and augmented Lagrangian method in sparse coding and constitutes the adaptive dictionary from the pixel spectral vectors extracted from the noisy image. Our results demonstrate that the HSI denoising performance is related to the sparsity of the representation. The effectiveness of the new adaptive sparse coding based approach to hyperspectral denoising, termed HyDeASp, is illustrated in a series of experiments on synthetic and real-world data where it outperforms the state-of-the-art. © 2018 IEEE.

关键词： Image denoising

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Computational temporal ghost imaging based on complementary modulation

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Chinese Physics B 2024年第11期33卷 278-283页

作者： Jia-Wei Li Wei Zhang Xue-Feng Liu Xu-Ri Yao Center for Quantum Technology Research and Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurements (MOE) School of Physics Beijing Institute of TechnologyBeijing 100081China Key Laboratory of Electronics and Information Technology for Space Systems National Space Science CenterChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

We report an experimental demonstration of temporal ghost imaging in which a digital micromirror device(DMD)and+1/-1 binary modulation have been combined to give an accurate reconstruction of a nonperiodic time *** to the 0/1 modulation,the reconstruction signal can be improved greatly by+1/-1 binary modulation even with half of the *** results show that 0/1 binary temporal objects up to 4 kHz and sinusoidal time objects up to 1 kHz can be reconstructed by this *** influences of modulation speed and array detector gray levels are also discussed.

关键词： temporal ghost imaging complementary modulation

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Microstructure and Wear Behaviour of Laser-induced Thermite Reaction Al_2O_3 Ceramic Coating on AA7075 Aluminum Alloy

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Journal of Materials science & technology 2007年第2期23卷 201-206页

作者： Kaijin HUANG Xin LIN Changsheng XIE T.M. Yue State Key Laboratory of Plastic Forming Simulation and Mould Technology Huazhong University of Science and Technology Wuhan 430074 China State Key Laboratory of Solidification Processing Northwestern Polytechnic University Xi＇an 710072 China Department of Industrial and Systems Engineering Hong Kong Polytechnic University Hung Hom Hong Kong China

The microstructure and wear behaviour of the thermite reaction coating produced by the hybrid laser claddingremelting on AA7075 aluminum alloy for the systems of Al-CuO-SiO2, Al-Cr2O3-SiO2, Al-Fe2O3-SiO2, and Al-TiO2-SiO2 were studied. The results of the X-ray diffraction （XRD） analysis show that in all the four reaction coatings, α-Al2O3 and γ-Al2O3 phases were present at the top surface, together with various intermetallic phases, the corresponding reduced metal and Al phase in the fusion zone. Under the dry sliding condition, the wear resistance, in terms of weight loss, of the laser-clad specimens was considerably higher than that of the untreated specimen. The predominant wear mechanism of the former specimens was abrasive wear, while for the latter, it was the adhesive wear that prevailed.

关键词： Laser cladding Thermite reaction Aluminum alloy Wear

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Detection efficiency characteristics of free-running InGaAs/InP single photon detector using passive quenching active reset IC

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Chinese Physics B 2016年第1期25卷 460-464页

作者：郑福王超孙志斌翟光杰 Key Laboratory of Electronics and Information Technology for Space Systems National Space Science CenterChinese Academy of SciencesBeijing 100190China. University of Chinese Academy of Sciences Beijing 100049China College of Physics Beijing Institute of TechnologyBeijing 100081China

InGaAs/InP avalanche photodiodes （APD） are rarely used in a free-running regime for near-infrared single photon detection. In order to overcome the detrimental afterpulsing, we demonstrate a passive quenching active reset integrated circuit. Taking advantage of the inherent fast passive quenching process and active reset to reduce reset time, the integrated circuit is useful for reducing afterpulses and is also area-efficient. We investigate the free-running single photon detector＇s afterpulsing effect, de-trapping time, dark count rate, and photon detection efficiency, and also compare with gated regime operation. After correction for deadtime and afterpulse, we find that the passive quenching active reset free-running single photon detector＇s performance is consistent with gated operation.

关键词： single photon detector free-running passive quenching active reset

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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 rehearsal model of complex system based on Petri Nets

Research on rehearsal model of complex system based on Petri...

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IASTED International Conference on Applied simulation and Modelling, ASM 2011

作者： Ye, Feng Lan, Guo-Xing Cai, Ye-Quan Zhang, Ying-Chao Science and Technology on Complex Systems Simulation Laboratory Post Box. 9702#19 Beijing 100101 China

ISBN: (纸本)9780889868939

The typical operation flow of complex system has analyzed in this paper. The rehearsal model of the complex system based on the principle of Petri Nets has proposed, and illustrated by the case of OODA. The Petri Nets demonstration prototype under a typical scenario of complex system has built. The method of complex system modeling based on Petri Nets is a possible approach to fit in with the needs of constructing a typical rehearsal system of the complex system by existing simulation models (subsystems) in a short time. It meets the requirements of the demonstration research and evaluation mission for the complex system, which carries out in a short-term action cycle and accomplishes the mission in high efficiency.

关键词： Petri nets

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Increased Roles of Linear Algebra in Control Education

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IEEE Control systems 1995年第4期15卷 76-90页

作者： Skelton, Robert E. Iwasaki, Tetsuya Aeronautical and Astronautical Engineering Space Systems Control Laboratory Purdue University West Lafayette IN Department of Systems Science Tokyo Institute of Technology

In the past, control theory developed along different lines that required different mathematical tools. Time-varying systems required one set of tools, time-invariant another. Single-input, single-output problems lend themselves easily to one approach, but this approach is awkward for multivariable systems, etc. The purpose of this article is to point to the desirability of a unified approach to elementary control education using only tools of linear algebra as the enabling unifier. The following is a description and motivation for the proposed new control course (approach). There is only one main theorem from linear algebra, and at least 17 different control problems all reduce to solving a single linear algebra problem.< >

关键词： Linear algebra Control theory Control systems Transfer functions State-space methods Linear matrix inequalities Time varying systems Stochastic systems Linear systems Frequency domain analysis

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Relationship graph learning network for visual relationship detection 2

Relationship graph learning network for visual relationship ...

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2nd ACM International Conference on Multimedia in Asia, MMAsia 2020

作者： Li, Yanan Yu, Jun Zhan, Yibing Chen, Zhi Key Laboratory of Complex Systems Modeling and Simulation School of Computer Science and Technology Hangzhou Dianzi University Hangzhou China

ISBN: (纸本)9781450383080

Visual relationship detection aims to predict the relationships between detected object pairs. It is well believed that the correlations between image components (i.e., objects and relationships between objects) are significant considerations when predicting objects' relationships. However, most current visual relationship detection methods only exploited the correlations among objects, and the correlations among objects' relationships remained underexplored. This paper proposes a relationship graph learning network (RGLN) to explore the correlations among objects' relationships for visual relationship detection. Specifically, RGLN obtains image objects using an object detector, and then, every pair of objects constitutes a relationship proposal. All relationship proposals construct a relationship graph, in which the proposals are treated as nodes. Accordingly, RGLN designs bi-stream graph attention subnetworks to detect relationship proposals, in which one graph attention subnetwork analyzes correlations among relationships based on visual and spatial information, and the other analyzes correlations based on semantic and spatial information. Besides, RGLN exploits a relationship selection subnetwork to ignore redundant information of object pairs with no relationships. We conduct extensive experiments on two public datasets: the VRD and the VG datasets. The experimental results compared with the state-of-the-art demonstrate the competitiveness of RGLN. © 2021 ACM.

关键词： Semantics

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Target Identity Fusion Method Based on Improved DS Evidence Theory 3

Target Identity Fusion Method Based on Improved DS Evidence ...

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3rd International Conference on Electronic Information Engineering and Computer, EIECT 2023

作者： Wang, Yi Liu, Desheng Yang, Yang Liu, Jiatong Space Engineering University Science and Technology on Complex Electronic System Simulation Laboratory Beijing101400 China Space Engineering University Beijing101400 China

ISBN: (纸本)9798350357707

Target data detected by multi-sensors often differ from each other due to different sensor performances, resulting in uncertainty of target identity information. Traditional Dempster-Shafer (DS) evidence theory may achieve counter-intuitive outcomes facing evidence conflicts caused by the uncertainty. Aiming for this, a novel target identity fusion method based on improved DS evidence theory is proposed in this paper. Specifically, the method considers the correlation between evidences and the importance of evidences integrally. First, an improved conflict measurement method based on Pearson correlation coefficient matrix is devised to measure the evidence credibility. Next the information volume of evidences is measured by Deng-entropy to indicate the evidence uncertainty. Then the credibility and uncertainty are weighted and combined to modify the basic probability assignment (BPA) of evidences. Ultimately, the modified evidences are fused by Dempster's combination rule to acquire the final results. Through three numerical analysis examples, this paper demonstrates the superiority of the proposed method over typical previous approaches, which can effectively process evidence conflicts in multi-sensors information fusion. © 2023 IEEE.

关键词： Numerical methods

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