检索结果-内蒙古大学图书馆

Geoacoustic inversion using ship noise vector field

Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University 2018年第2期39卷 236-240页

作者： Ren, Qunyan Piao, Shengchun Ma, Li Guo, Shengming Liao, Tianjun Institute of Acoustics Chinese Academy of Sciences Beijing100190 China Key Laboratory of Underwater Acoustics Environment Chinese Academy of Sciences Beijing100190 China Science and Technology on Underwater Acoustic Laboratory Harbin Engineering University Harbin150001 China State Key Laboratory of Complex System Simulation Beijing100101 China

Seabed geoacoustic parameters and associated uncertainties are important for sonar performance prediction and related applications, and the feasibility of jointly using pressure and vector fields to increase geoacoustic inversion reliability is discussed. The matching field inversion algorithm is used to process ship noise data collected by a single-vector hydrophone, and the estimation value and posterior probability distribution is derived. Theoretical analysis and a numerical simulation suggest that the component of the vertical particle velocity provides more abundant acoustic signal transmission characteristics than when using the acoustic pressure field only, and more consolidated estimates can be obtained through using pressure and vector fields jointly than by treating them individually. © 2018, Editorial Department of Journal of HEU. All right reserved.

关键词： Uncertainty analysis

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Analysis of deceptive moving target generated by single jammer in multi-channel SAR-GMTI

Analysis of deceptive moving target generated by single jamm...

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International Applied Computational Electromagnetics Society Symposium in China

作者： Jingke Zhang Dahai Dai Zongfeng Qi Yonghu Zeng Shunping Xiao State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System College of Electronic Science and Engineering National University of Defense Technology

ISBN: (纸本)9781509043118

Based on three-channel SAR-GMTI system, the velocity and location of the deceptive moving target generated by single jammer are studied. Study result shows that both the deceptive stationary target and moving target can be considered as moving target, and the estimated azimuth location which has nothing to do with the setting value is the same as jammer.

关键词： Jamming Azimuth Synthetic aperture radar Radar imaging Antennas Imaging

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3D-Parallel Coordinates:Visualization for Time Varying Multidimensional Data

3D-Parallel Coordinates:Visualization for Time Varying Multi...

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2016 IEEE 7th International Conference on Software Engineering and Service science

作者： Yao Zhonghua Wu Lingda Science and Technology on Complex Electronic System Simulation Laboratory Equipment Academy

Parallel coordinates can visualize multidimensional data efficiently,during to its shortage in displaying time-varying data,we present a new method to add time dimension,which can extend parallel coordinates into 3D space(3D-Parallel Coordinates)consisted of attribute,range and time *** that timevarying multidimensional data can be displayed as polygonal line cluster for recording and analyzing.A technique called clipping shade is taken to highlight datasets around the current time,and results reveal that 3D-Parallel Coordinates can effectively analyze attribute's time-varying character.

关键词： parallel coordinates time-varying multidimensional data data visualization

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A Hierarchical Access Control Model of Software Repository Based on RBAC

A Hierarchical Access Control Model of Software Repository B...

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2016 IEEE 7th International Conference on Software Engineering and Service science

作者： Cen Pengrui Wu LingDa Yang Chao Yu Ronghuan Science and Technology on Complex Electronic System Simulation Laboratory Academy of Equipment

Analized the task and general form of the software management;pionted out the shortages of the software repository on *** introduced the Role-Based Access Control model(RBAC model) which was introduced into the construction of software repository service by combining with the requirement of security management about software repository.A hierarchical access control model based on RBAC was proposed,and it database of the software repository based on RBAC was *** effective application of this model in the process of software management can ensure the convenience of software distribution;and meanwhile it can effectively improve the security of the software packages.

关键词： software management access control model security

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Network Boundary and Protection

Network Boundary and Protection

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International Conference on Cyber-Enabled Distributed Computing and Knowledge Discovery, CyberC

作者： Haitao Yang Jian Zhang Science and Technology on Complex Electronic System Simulation Laboratory Department of Graduate Management Equipment Academy Beijing China

ISBN: (纸本)9781509051557

The exposure of PRISM reminds us of network sovereignty. There are two problems about network sovereignty-network boundary partition and protection. These two problems are discussed in this paper. A method of multidimensional network boundary partition is proposed based on comprehensive analysis of existing schemes. And network boundary protection is studied based on standard rules of cyber warfare. Characteristic of network boundary protection technique is analyzed and methods are proposed about how to construct network boundary protection.

关键词： Law Switches Security Logic gates Servers Internet Ports (Computers)

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Energy efficiency analysis of heterogeneous platforms: Early experiences 7

Energy efficiency analysis of heterogeneous platforms: Early...

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7th International Green and Sustainable Computing Conference, IGSC 2016

作者： Li, Youhuizi Shi, Weisong Jiang, Congfeng Zhang, Jilin Wan, Jian Key Laboratory of Complex Systems Modeling and Simulation Hangzhou Dianzi University China Mobile and Internet Systems Laboratory Wayne State University United States School of Information and Electronic Engineering Zhejiang University of Science and Technology China

ISBN: (纸本)9781509051175

Heterogeneous multi-core platforms, e.g., ARM's ***, are a promising trend to improve the performance and energy efficiency of future mobile systems. However, the immediate benefits and the challenges to take advantage of the heterogeneity are still not clear. In this paper, we present our early experiences about the energy efficiency of the two *** heterogeneous platforms: ODROID XU+E and ODROID XU3. We quantified compared them with homogeneous platforms through multiple benchmarks which include popular mobile applications and high-performance parallel benchmarks. Besides, we analyzed the scheduling impact on the energy consumption of the heterogeneous platforms and the migration cost is also discussed. Based on the results, several insights, such as fine-granularity power control and thread level parallelism, related to hardware, application and system design are derived. © 2016 IEEE.

关键词： Energy utilization

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A novel 3-D imaging algorithm for downward-looking MIMO Array SAR 11

A novel 3-D imaging algorithm for downward-looking MIMO Arra...

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11th European Conference on Synthetic Aperture Radar, EUSAR 2016

作者： Liao, Bin Dai, Dahai Xing, Shiqi Pang, Bo Wang, Xuesong School of Electronic Science and Engineering National University of Defense Technology Changsha410073 China State Key Laboratory of Complex Electromagnetics Effects on Eletctronics and Information System National University of Defense Technology Changsha410073 China

Downward-looking MIMO array 3-D synthetic aperture radar is a hot research recently, it overcomes the layover and can acquire more information with the affordable antenna elements. The multiple transmitters and receivers provide a larger degree of freedom, which could be uesd to reduce the pulse repeat frequency, extend the wide-swath or suppress the interferers and so on. However, there are little literates considering the polarization in this new radar system, this paper introduce the polarization in and proposed a Tikhonov regularization algorithm to reconstruct the 3-D images. The simulation results show the proposed algorithm is excel to FFT method with the SNR increase. © VDE VERLAG GMBH · Berlin · Offenbach.

关键词： Synthetic aperture radar

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The Evaluation Method of Equipment system of systems Based on Big Data Analysis

The Evaluation Method of Equipment System of Systems Based o...

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2015 International Conference on Automation,Mechanical Control and Computational Engineering(AMCCE 2015)

作者： Liu Dong Li Kang Science and Technology on Complex Electronic System Simulation Laboratory

ISBN: (纸本)9781510803084

In the evaluation of equipment system of systems(So S), equipment data has shown some new characters, such as big volume, wide range sources, and dynamic variance. The paper pointed out the idea to evaluate equipment So S based on big data analysis techniques. The outline of the method is provided from two points of view, namely the big data processing techniques and equipment So S evaluation methods. Based on big data, equipment So S efficiency evaluation, counter evaluation, and other deeper level applications, such as intelligence processing and situation analysis, can be made. The method is a new method in the equipment So S evaluation field.

关键词： equipment system of systems efficiency evaluation data analysis

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Analysis of underwater locomotion and improvement of FroBot

Analysis of underwater locomotion and improvement of FroBot

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2016 IEEE International Conference on Advanced Intelligent Mechatronics, AIM 2016

作者： Yi, Yang Jianqing, Zhang Han, Xu Maokuan, Chen Lu, Zhang Zhongjing, Zhu School of Automation Beijing Institute of Technology Beijing China State Key Laboratory of Intelligent Control and Decision of Complex System Beijing Institute of Technology Beijing China Department of Electronic Engineering School of Information Science and Technology Tsinghua University Beijing China

ISBN: (纸本)9781509020652

The main characteristic of FroBot is the dual-swing-legs propulsion mechanism, and it is necessary for us to conduct a series of experiments to study its propulsion model, both on land and underwater. As the propulsion of FroBot comes from the interaction force between caudal fins and water when it locomotes underwater, this paper presents an analysis about the propulsion and control of angle Θ. Then a number of underwater hydrodynamic simulations and analysis are also conducted to get a better control in reality. Finally, on the basis of propulsion model and experiments, we present the latest mechanical structure designs and further improvements to eliminate the limitations exposed in the previous generations of FroBot. © 2016 IEEE.

关键词： Propulsion

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A system-of-systems architecture-driven modeling method for combat system effectiveness simulation 2

A system-of-systems architecture-driven modeling method for ...

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2nd Annual IEEE International Symposium on systems Engineering, ISSE 2016

作者： Li, Xiaobo Wang, Weiping Shu, Zhe Zhu, Ning He, Hua Liao, Tianjun College of Information Systems and Management National University of Defense Technology Changsha Hunan410073 China Department of Mathematics and Computer Science University of Antwerp Antwerp2020 Belgium State Key Laboratory of Complex System Simulation Beijing Institute of Systems Engineering Beijing China

ISBN: (纸本)9781509007936

Under the background of system-of-systems (SoS) counterwork, it is more apparent that the simulation modeling of the equipment should be domain-specific, formal, automatic and composable. Current equipment effectiveness simulation modeling approaches are mainly based on the methods and techniques from the modeling and simulation (M&S) community and software engineering community, and they are not capable to satisfy these four requirements systematically. Thus the systems engineering architecture model and domain knowledge should be used to support effectiveness simulation modeling more effectively. In this research, we propose an architecture-driven modeling method which conforms to the principle of architecture-driven development, uses ontology techniques to build equipment SoS architecture model and sub-domain ontology. This method performs architecture driven simulation modeling to realize the transformation from architecture models to simulation model frameworks;employs ontological metamodeling to design domain-specific modeling languages (DSML) based on the comprehensive usage of architecture models, sub-domain ontologies and M&S formalisms;integrates domain-specific simulation models from various domains using the model framework, and supports the composable development of simulation applications. © 2016 IEEE.

关键词： system of systems

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