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International Joint Conference on Neural Networks

作者： Yury Tsoy Computer Engineering Department Tomsk Polytechnic University Department of Economical Mathematics Informatic and Statistics Tomsk State University of Control Systems and Radioelectronics

ISBN: (纸本)9781467314886

Principal Components Analysis (PCA) is one of the most wide-spread methods for dimensionality reduction, which is being applied in many research and problem domains. So far a lot of approaches to compute data matrix eigenvectors, which correspond to the Principal Components, were proposed, among which numerical methods and Hebbian-based learning for neural networks, including Generalized Hebbian Algorithm. In this paper a novel way for computing eigenvectors using evolving linear neural networks is introduced, which is not relying upon correlation between nodes, but uses special fitness function instead. Early removal of the low-informative linear subspaces is applied, which reduces computational complexity of the method, and besides eigenvectors coordinates are computed approximately to improve convergence and speed. The latter gave rise to the approach's name: pseudo-PCA. Experimental results show that not looking at inexact eigenvectors the approach allows effective reduction of the features space dimensionality with acceptable classification accuracy compared to some "classical" and modern approaches to solve classification problems.

关键词： Eigenvector dimensionality reduction Neural network Numerical methods complexity classes principal components analysis Ganglia Converge

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Free space and speed humps detection using lidar and vision for urban autonomous navigation

Free space and speed humps detection using lidar and vision ...

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IEEE Symposium on Intelligent Vehicle

作者： C. Fernández M. Gavilán D. F. Llorca I. Parra R. Quintero A. G. Lorente Lj. Vlacic M. A. Sotelo Computer Engineering Department Polytechnic School University of Alcalá Madrid Spain Intelligent Control Systems Laboratory Griffith University Brisbane Australia

In this paper, a real-time free space detection system is presented using a medium-cost lidar sensor and a low cost camera. The extrinsic relationship between both sensors is obtained after an off-line calibration process. The lidar provides measurements corresponding to 4 horizontal layers with a vertical resolution of 3.2 degrees. These measurements are integrated in time according to the relative motion of the vehicle between consecutive laser scans. A special case is considered here for Spanish speed humps, since these are usually detected as an obstacle. In Spain, speed humps are directly related with raised zebra-crossings so they should have painted white stripes on them. Accordingly the conditions required to detect a speed hump are: detect a slope shape on the road and detect a zebra crossing at the same time. The first condition is evaluated using lidar sensor and the second one using the camera.

关键词： Vehicles Roads Laser radar Cameras Measurement by laser beam Lasers Shape

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Distributed Output Regulation for Multi-agent systems with Unknown Communication Delays

Distributed Output Regulation for Multi-agent Systems with U...

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The 24th Chinese control and Decision Conference (第24届中国控制与决策学术年会 2012 CCDC)

作者： Lu Yu Jinzhi Wang Zhong-Ping Jiang Yiguang Hong State Key Laboratory for Turbulence and Complex Systems Department of Mechanics and Aerospace Engin Department of Electrical and Computer Engineering Polytechnic Institute of New York University Bro Key Laboratory of Systems and Control Academy of Mathematics and Systems Science Chinese Academy o

In this paper, the distributed output regulation problem of multi-agent linear systems with communication time delays is studied, by means of both dynamic state and output feedback control laws. Given bounded communication delays, distributed control laws are designed via linear matrix inequalities (LMI). Both delay-independent and delaydependent conditions are discussed.

关键词： Multi-agent systems Output Regulation Time Delay

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Damage analysis on a graded porous biocomposite structure under flexural load using FEM

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Strength, Fracture and Complexity 2011年第3期7卷 241-252页

作者： Tang, C.Y. Tsui, C.P. Wei, L. Wang, Z.W. Department of Industrial and Systems Engineering Hong Kong Polytechnic University Kowloon Hong Kong Department of Process Equipment and Control Engineering Dalian University of Technology Dalian China

A multi-level finite element (FE) method was developed to firstly study the mechanical responses and progressive damage behaviors of graded porous structures made of hydroxyapatite particle reinforced polymer biocomposite (HA/PEEK) under flexure load. In order to bridge the mechanical properties of the base material, damage and failure criteria of the building blocks for the graded porous structure, and macroscopic response of the structure, three-level FE models from micro-, meso- to macro-scale were established. A graded porous biocomposite implant was considered as a continuum structure with a solid section and a porous section with a gradient change in porosity from 29.5 to 80.9% in six equal steps. The macro-scale FE model of the implant was then constructed from the meso-scale unit cubic-shaped cell model, which was made of beam elements with a fixed length but a gradient change in their cross-section areas depending on the porosity level. The base material of the structure, HA/PEEK, was obtained from our previous work through a micro-scale unit cell model consisting of the particle and polymer matrix for predicting its stress-strain relation with dependence on variation of HA volume fraction. By adoption of the proposed method, a virtual three-point bending test was simulated to predict force-displacement relations of the implant and its damage initiation and propagation in both graded and uniform porous structures under flexural load. The trend of the predicted results agreed with those reported in open literature. © 2011/2012 - IOS Press and the authors. All rights reserved.

关键词： Finite element method

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Photonic technologies for millimeter- and submillimeter-wave signals

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Advances in Optical Technologies 2012年第1期2012卷

作者： Vidal, B. Nagatsuma, T. Gomes, N.J. Darcie, T.E. Nanophotonics Technology Center Polytechnic University of Valencia 46022 Valencia Spain Department of Systems Innovation Graduate School of Engineering Science Osaka University Osaka 565-0871 Japan Broadband and Wireless Communications Group University of Kent Canterbury CT2 7NT United Kingdom Department of Electrical and Computer Engineering University of Victoria Victoria BC V8W 3P6 Canada

Fiber optic components offer a competitive implementation for applications exploiting the millimeter-wave and THz regimes due to their capability for implementing broadband, compact, and cost-effective systems. In this paper, an outline of the latest technology developments and applications of fiber-optic-based technologies for the generation, transmission, and processing of high-frequency radio signals is provided. © 2012 B. Vidal et al.

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Microwave photonics

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Advances in Optical Technologies 2012年第1期2012卷

作者： Vidal, Borja Gomes, Nathan J. Nagatsuma, Tadao Darcie, Thomas E. Nanophotonics Technology Center Polytechnic University of Valencia 46022 Valencia Spain Broadband and Wireless Communications Group University of Kent Canterbury CT2 7NT United Kingdom Department of Systems Innovation Graduate School of Engineering Science Osaka University Suita Osaka 565-0871 1-1 Yamadaoka Japan Department of Electrical and Computer Engineering University of Victoria Victoria BC V8W 3P6 Canada

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Stochastic H_2 Optimal control of Discrete-Time Markov Jump systems with Periodic Coefficients

Stochastic H_2 Optimal Control of Discrete-Time Markov Jump ...

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American control Conference

作者： Hongji Ma Yingmin Jia Junping Du Fashan Yu Seventh Research Division and the Department of Systems and Control Beihang University (BUAA) Beijing 100191 China Beijing Key Laboratory of Intelligent Telecommunications Software and Multimedia School of Computer Science and Technology Beijing University of Posts and Telecommunications Beijing 100876 China School of Electrical Engineering and Automation Henan Polytechnic University Jiaozuo 454000 Henan China

ISBN: (纸本)9781457710957

In this paper, the H_2 optimal state-feedback control problem is investigated for discrete-time Markov jump systems subject to periodic coefficients and multiplicative noise. First of all, an exhaustive analysis is pursued to set up an H_2 performance criterion (H_2 norm), which can be characterized by the periodic solutions of two generalized Lyapunov equations. Based on the obtained H_2 norm, the H_2 optimal state-feedback controller is designed in terms of the stabilizing solution of a discrete-time generalized Riccati equation with periodic coefficients. Moreover, this stabilizing solution can be computed efficiently by the available iterative algorithm.

关键词： Markov processes Noise Educational institutions Riccati equations Optimal control

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On the potentilities of detecting small-size sea surface objects using a marine radar «Burevisnyk-3»

On the potentilities of detecting small-size sea surface obj...

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International Crimean Conference on Microwave & Telecommunication Technology

作者： V. P. Dzyuba A. D. Dorichenko V. D. Yeryomka A. F. Zykov L. P. Milinyevskiy I. M. Mytsenko O. I. Prokopenko A. N. Roenko D. V. Roskoshnyi SE plant Generator Kyiv Ukraine SE plant Burevestnik Kyiv Ukraine Usikov Institute for Radiphysics and Electronics National Academy of Sciences of Ukraine Kharkiv Ukraine Department of Hybrid Modeling and Control Systems in Power Engineering Pukhov Institute for Modeling in Energy Engineering National Academy of Sciences of Ukraine Kyiv Ukraine Institute of Telecommunication Systems National Technical University Kharkov Polytechnic Institute Kyiv Ukraine

The function circuit and performance characteristics of dual band radioelectronic facilities (DBRF) “Burevisnyk-3”, which is a new-generation complex integrated radio electronics system operating in the X-band and Ka-band wavelength with a unitary control system, are described. The above radar system is intended for technical surveillance and monitoring of open water area situation. It is located at coastal observation points in an effort to tackle the navigation issues, to control the equipment operations aboard river and sea-going ships, including high-speed “screenplanes”, hydrofoil vessels and air-cushion vessels.

关键词： Monitoring Radar antennas Sea surface Radar tracking Cathodes Receivers

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Lane Keeping control for Autonomous 4WS4WD Vehicles Subject to Wheel Slip Constraint

Lane Keeping Control for Autonomous 4WS4WD Vehicles Subject ...

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American control Conference

作者： Changfang Chen Yingmin Jia Junping Du Fashan Yu Seventh Research Division and the Department of Systems and Control Beihang University (BUAA) Beijing 100191 China Beijing Key Laboratory of Intelligent Telecom-munications Software and Multimedia School of Computer Science and Technology Beijing University of Posts and Telecommunications Beijing 100876 China School of Electrical Engineering and Automation Henan Polytechnic University Jiaozuo 454000 Henan China

ISBN: (纸本)9781457710957

This paper proposes a robust control scheme that prevents an autonomous 4WS4WD vehicle from lane departure and wheel skidding in presence of road curvature and aerodynamic drag. The control objectives can be specified as various closed-loop specifications, such as lane keeping, wheel slip constraint and disturbance attenuation. An LMI approach is used to deal with these objectives simultaneously, which combines the quadratic stabilization technique with constraints on inputs. Simulation results show that the proposed controller effectively limits the combined wheel slip and improves the lane keeping performance.

关键词： Wheels Vehicles Roads Tires Friction Aerodynamics Vehicle dynamics

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Integrated Approach to Hypersonic Vehicle Modeling

Integrated Approach to Hypersonic Vehicle Modeling

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Chinese control Conference

作者： Xiaofeng Su Yingmin Jia Junping Du Fashan Yu The Seventh Research Division and the Department of Systems and Control Beihang University (BUAA) Key Laboratory of Mathematics Informatics and Behavioral Semantics (LMIB) Ministry of Education SMSS Beihang University (BUAA) Beijing Key Laboratory of Intelligent Telecommunications Software and Multimedia School of Computer Science and Technology Beijing University of Posts and Telecommunications School of Electrical Engineering and Automation Henan Polytechnic University

ISBN: (纸本)9781467325813

This paper is devoted to the modeling problem of hypersonic vehicle with significant couplings. An integrated approach is developed to analytically model the dynamics of hypersonic vehicle, in which the effects of variable mass, spherical rotating earth, and couplings among the sub-models are considered. Furthermore, a preliminary analysis is conducted using the general data of a hypersonic vehicle. The simulation results show that the maximum of the Coriolis force can reach values up to 7.02% of the vehicle weight, and that the thermal load determined by the nonuniform aerodynamic heating and the properties of the structure has a significant influence on the elastic deformation.

关键词： Hypersonic vehicle modeling Inertial dynamics Aerodynamics Elasticity Heating hypersonic vehicles Aerodynamics elasticity Coriolis force Vehicle weight Heating Couplings Thermal loading elastic deformation

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