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7th International Conference on High Performance Compilation, Computing and Communications, HP3C 2023

作者： Hongxing, Hao Ronghuan, Yu Jing, Guo Science and Technology on Complex Electronic System Simulation Laboratory Space Engineering University Beijing China

ISBN: (纸本)9781450399883

With the rapid development of network technologies such as the Internet of Things, the scale of networks has gradually increased. The P2P networks have been gradually studied, and fault detection and localization for large-scale networks have become a hot research topic. Generally, probes are usually used to quickly locate the fault nodes, but the ability to locate network faults is determined by the choice of probes. This paper studies the probe set determination problem and proposes the criteria named segmentation entropy to judge the probe set. Then a probe set determination method is proposed which does not require a candidate set and performs better than the random probe selection algorithm. Experimental results proves that the proposed algorithm can quickly obtain excellent probe sets. © 2023 ACM.

关键词： Probes

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Research on Requirement Analysis Method of Space Equipment technology system based on capability 7

Research on Requirement Analysis Method of Space Equipment T...

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

作者： Jian, Ping Xiong, Wei Liu, Desehng Space Engineering University Science and Technology on Complex Electronic System Simulation Laboratory Beijing China

ISBN: (纸本)9798350334197

"Demand traction and technology promotion"is the main law of equipment system construction and development. Scientific determination and quantitative evaluation of key technologies in the field of military equipment is the key and difficult point of system macro demonstration. Based on the analysis of the technical structure of space information equipment technology, this paper proposes a capability-based requirement analysis framework and process of space information equipment technology system, establishes a requirement analysis model of technology system, and constructs its technical system by taking space situation awareness system as an example. It provides technical basis for the requirement analysis of space information equipment technology system. © 2023 IEEE.

关键词： Construction equipment

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Hyperspectral Image Anomaly Detection Based on Auto Encoder 4

Hyperspectral Image Anomaly Detection Based on Auto Encoder

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4th International Conference on Geoscience and Remote Sensing Mapping, GRSM 2022

作者： Li, Guanzhe Wu, Lingda Hao, Hongxing Science and Technology on Complex Electronic System Simulation Laboratory Space engineering university Beijing China

ISBN: (数字)9781510662179

ISBN: (纸本)9781510662162

The reason for the existence of small targets and sub-pixel targets in hyperspectral images is that the low spatial resolution leads to the phenomenon of mixed pixels, which makes some targets exist in the form of small targets and sub-pixel targets in the image. Moreover, the traditional anomaly detection algorithm introduces the regularization parameter into hyperspectral anomaly detection, but the regularization parameter needs to be manually set and adjusted. However, since the anomaly detection is carried out without prior information, in real situations, it is difficult to obtain the prior information of the target, so the regularization parameter may be difficult to determine. In addition, considering that traditional algorithms are not sensitive to small target pixel targets, a hyperspectral anomaly detection network based on self encoder is designed for hyperspectral images with small targets and sub-pixel targets. © 2023 SPIE.

关键词： Anomaly detection

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Optimization of radar reconnaissance constellation based on fuzzy relative entropy 6

Optimization of radar reconnaissance constellation based on ...

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6th International Conference on Advanced Electronic Materials, Computers, and Software Engineering, AEMCSE 2023

作者： Liu, Yali Xiong, Wei Han, Chi Science and Technology on Complex Electronic System Simulation Laboratory Space Engineering University Beijing101416 China

ISBN: (纸本)9781510668249

The optimization of radar reconnaissance constellation is of great significance for reconnaissance timeliness. In order to solve the problems of insufficient selection pressure and poor diversity of the evolutionary algorithm based on Pareto domination in solving the many-objective optimization problem of radar reconnaissance constellation, an imporved particle swarm optimization based on fuzzy relative entropy (IFREM_PSO) is proposed. A new inertial weight strategy is proposed to enhance the convergence speed and accuracy of the algorithm, improve the external archive maintenance strategy, and enhance the convergence and diversity of the algorithm. The optimization model of radar imaging reconnaissance constellation oriented to area reconnaissance is constructed. The IFREM_PSO is used to optimize the model, and the multi-objective particle swarm optimization algorithm (MOPSO) is used as the control algorithm. Experiments show that the IFREM_PSO has better results in terms of convergence, diversity and convergence speed, and can effectively solve the problem of radar reconnaissance constellation optimization. © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.

关键词： Entropy

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Linear-quadratic and norm-bounded combined differential game guidance scheme with obstacle avoidance for attacking defended aircraft in three-player engagement

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Defence technology（防务技术） 2024年第12期42卷 136-155页

作者： Xintao Wang Ming Yang Songyan Wang Mingzhe Hou Tao Chao Control and Simulation Center Harbin Institute of TechnologyHarbin 150001China National Key Laboratory of Complex System Control and Intelligent Agent Cooperation Harbin 150001China Center for Control Theory and Guidance Technology Harbin Institute of TechnologyHarbin 150001China

A differential game guidance scheme with obstacle avoidance,based on the formulation of a combined linear quadratic and norm-bounded differential game,is designed for a three-player engagement scenario,which includes a pursuer,an interceptor,and an *** confrontation between the players is divided into four phases(P1-P4)by introducing the switching time,and proposing different guidance strategies according to the phase where the static obstacle is located:the linear quadratic game method is employed to devise the guidance scheme for the energy optimization when the obstacle is located in the P1 and P3 stages;the norm-bounded differential game guidance strategy is presented to satisfy the acceleration constraint under the circumstance that the obstacle is located in the P2 and P4 ***,the radii of the static obstacle and the interceptor are taken as the design parameters to derive the combined guidance strategy through the dead-zone function,which guarantees that the pursuer avoids the static obstacle,and the interceptor,and attacks the ***,the nonlinear numerical simulations verify the performance of the game guidance strategy.

关键词： Active defense aircraft Differential game theory Three-player confrontation Energy optimization Acceleration constraint Obstacle avoidance

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Multi-objective optimization of reconnaissance constellation based on machine learning 4

Multi-objective optimization of reconnaissance constellation...

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4th International Conference on Computer science and Communication technology, ICCSCT 2023

作者： Liu, Yali Xiong, Wei Xiong, Minghui Yu, Xiaolan Liu, Zheng Science and Technology on Complex Electronic System Simulation Laboratory Space Engineering University Beijing101416 China

ISBN: (纸本)9781510671232

The optimization of reconnaissance constellation is an important step in the construction of space-based information system, and the coverage performance is the key index of the optimization of reconnaissance constellation. However, the coverage performance of the current constellation is mostly obtained through the simulation system, which has high time complexity and low efficiency, seriously slowing down the speed of constellation optimization. In order to improve the efficiency of constellation optimization, a two-stage optimization scheme of reconnaissance constellation based on machine learning is proposed. First, the trained machine learning prediction model is combined with the evolutionary algorithm to carry out rough optimization of the reconnaissance constellation, and the decision variable space after the scope is reduced is obtained. Then, in the reduced decision variable space, the simulation system and evolutionary algorithm are used to further optimize the problem, and the final result is obtained. The scheme proposed in this paper speeds up the convergence of population by reducing the search space of decision variables, thus improving the optimization efficiency. By comparing the optimization results of this scheme with those of the traditional scheme, it is found that the proposed scheme is 78.21% shorter than that of the traditional scheme under the premise that the quality gap between the optimization results of the traditional scheme and the traditional scheme is acceptable, which greatly improves the optimization speed of the reconnaissance constellation, and verifies the effectiveness and advancement of the proposed scheme. © 2023 SPIE.

关键词： Multiobjective optimization

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Research on Modeling of spatial information Network based on combat ring 3

Research on Modeling of spatial information Network based on...

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3rd International Conference on Digital Signal and Computer Communications, DSCC 2023

作者： Di, Lu Zhongwen, Zhao Yaru, Wang Science and Technology on Complex Electronic System Simulation Laboratory Space Engineering University Beijing101416 China

ISBN: (数字)9781510666566

ISBN: (纸本)9781510666559

Spatial information network itself is a comprehensive information network with multiple functions, which plays an important role in information acquisition, attack support, navigation and positioning, etc. In order to describe the function of spatial information network in detail, the combat ring theory is introduced to model the nodes, inter-satellite links and earth-satellite links of the network. At the same time, due to its complex and dynamic nature, Different from conventional combat network, the time accumulation graph model is introduced to further describe the network model, so as to truly reflect the support and attack capability of spatial information network under the combat background. © 2023 SPIE.

关键词： Graph theory

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Study on the coupling calculation method for the launch dynamics of a self-propelled artillery multibody system considering engraving process

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Defence technology（防务技术） 2024年第9期39卷 67-85页

作者： Shujun Zhang Xiaoting Rui Hailong Yu Xiaoli Dong Institute of Launch Dynamics Nanjing University of Science and TechnologyNanjing 210094China National Key Laboratory of Complex Multibody System Dynamics Nanjing 210094China

The launch dynamics theory for multibody systems emerges as an innovative and efficacious approach for the study of launch dynamics,capable of addressing the challenges of complex modeling,diminished computational efficiency,and imprecise analyses of system dynamic responses found in the dynamics research of intricate multi-rigid-flexible body systems,such as self-propelled *** advancement aims to enhance the firing accuracy and launch safety of self-propelled *** the shortfall of overlooking the band engraving process in existing theories,this study introduces a novel coupling calculation methodology for the launch dynamics of a self-propelled artillery multibody *** method leverages the ABAQUS subroutine interface VUAMP to compute the dynamic response of the projectile and barrel during the launch process of large-caliber self-propelled ***,it examines the changes in projectile resistance and band deformation in relation to projectile motion throughout the band engraving *** analysis of the computational outcomes with experimental data evidences that the proposed method offers a more precise depiction of the launch process of self-propelled artillery,thereby enhancing the accuracy of launch dynamics calculations for self-propelled artillery.

关键词： Self-propelled artillery Engraving process Multibody system dynamics Launch dynamics

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Super-Element Differential-Quadrature Discrete-Time Transfer Matrix Method for Efficient Transient Analysis of Rotor systems

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International Journal of Mechanical system Dynamics 2025年第1期5卷 141-159页

作者： Kai Xie Xiaoting Rui Bin He Jinghong Wang Institute of Launch Dynamics Nanjing University of Science and TechnologyNanjingChina National Key Laboratory of Complex Multibody System Dynamics Nanjing University of Science and TechnologyNanjingChina

Efficient transient analysis is critical in rotor *** study proposes the super-element(SE)differential-quadraturediscrete-time transfer matrix method(DQ-DT-TMM),a novel approach that eliminates the requirement for initial componentaccelerations and effectively handles beam and solid finite element(FE)models with high-dimensional degrees of freedom(DOFs)in rotor *** primary methodologies of this approach include:(1)For the beam substructure FE dynamicequation,the Craig-Bampton method is employed for the order reduction of internal coordinates,followed by the differentialquadraturemethod for temporal *** SE technology,the internal accelerations are condensed into theboundary accelerations,and the transfer equation and matrix for beam SEs are derived.(2)For the solid substructureFE dynamic equation formulated in the rotating reference frame,in addition to applying the procedures used for beamsubstructures,rigid multipoint constraints are introduced to condense the boundary coordinates for hybrid modeling withlumped parameter *** transfer equation is subsequently formulated in the inertial reference frame,enabling thederivation of the transfer matrix for solid *** analysis with full-order FE models in commercial softwaredemonstrates the advantages of the SE DQ-DT-TMM for linear rotor systems:(i)Accurately captures system dynamics usingonly a few primary modes.(ii)Achieves a 99.68%reduction in computational time for a beam model with 1120 elements and a99.98%reduction for a solid model with 75361 elements.(iii)Effectively recovers dynamic responses at any system node usingrecovery *** research develops a computationally efficient framework for the transient analysis of large-scale rotorsystems,effectively addressing the challenges associated with high-dimensional DOF models in conventional DT-TMMs.

关键词： differential-quadrature method discrete-time transfer matrix method model order reduction rotor dynamics super-element transient analysis

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Research on Multifaceted Presentation Methods for Product Spectra Based on Mixed Reality 4

Research on Multifaceted Presentation Methods for Product Sp...

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4th International Conference on Computer Vision and Pattern Analysis, ICCPA 2024

作者： Yu, Zhen Cheng, Lei Sun, Jiayuan Li, Yifei Shen, Junjie China Electronics Technology Group Corporation 15th Research Institute Beijing China Science and Technology on Complex System Simulation Laboratory Beijing China

ISBN: (纸本)9781510682528

With the evolution of augmented reality technology itself, its application fields continue to expand. The characteristics of multi-source augmented reality display methods, natural interaction means, and rich content volume provide a new application model inspiration for traditional information systems. As products advance, the analysis and presentation of product spectra have also put forward new requirements for diverse applications. Based on a comprehensive analysis of the display needs of product spectra, this paper proposes a multifaceted presentation framework for product spectra based on mixed reality technology, which can support the comprehensive display of overall situation, local situation, system capabilities, organization capabilities, and single-equipment capabilities. Compared with traditional display methods, it has more significant advantages. © 2024 SPIE.

关键词： Mixed reality

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