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World Congress on Intelligent control and Automation (WCICA)

作者： Xin Wen Feng Duan Yong Yu Jeffrey Too Chuan Tan Xiaomin Cheng College of Computer and Control Engineering Nankai University Tianjin P. R. China Institute of Industrial Science The University of Tokyo Tokyo Japan School of Mechanical Engineering Ningbo University of Technology Ningbo P. R. China

This paper presents a motor function rehabilitation system for the disabled with virtual reality. The design of the entire system is established on the SIGVerse virtual platform. The patient can complete the rehabilitation training immersed in a virtual environment. Firstly, the motion information of the patient is recognized by Kinect, and regenerated by the avatar in the virtual environment accurately. At the same time, the view of the avatar can be presented to the patient by HMD. Though this method, the patient can exposure to the virtual environment during the rehabilitation training, so that they can feel like their real and health motions in the virtual environment. Additionally, the EMG signals of the activated muscle are collected, and they can provide a feedback of contraction intensities of the muscle to the patient in real time. Moreover, we provide an electrical stimulation to the corresponding muscle. As a result, the patient can have the perception of muscle contractions.

关键词： Electromyography Muscles Electrical stimulation Training Virtual environments Avatars

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Significance and Mechanism of the Crack Initiation Process during Very High Cycle Fatigue of Duplex Stainless Steel

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Procedia engineering 2014年 74卷 143-146页

作者： U. Krupp A. Giertler M. Söker H. Fu B. Dönges H.-J. Christ K. Istomin A. Hüsecken U. Pietsch C.-P. Fritzen W. Ludwig Faculty Engineering and Computer Science University of Applied Sciences Osnabrück 49009 Osnabrück Germany Institute for Materials Technology Solid State Physics Institute for Mechanics and Control University of Siegen 57068 Siegen Germany European Synchrotron Radiation Facility ESRF 38043 Grenoble Cedex France

In the very high cycle fatigue (VHCF) regime, fatigue damage starts by the formation of slip bands within the softer austenite phase. By high energy X-ray diffraction it was shown that local austenite plasticity due to elastic/plastic anisotropy results in the gradual formation of residual stresses within the ferrite grains. Consequently, cracks are initiated either transgranularly or intergranularly at austenite/ferrite phase boundaries or ferrite/ferrite grain boundaries in the vicinity of the austenite slip bands. By means of ultrasonic fatigue testing of miniature specimens in combination with (i) in-situ observation, (ii) electron back- scatter diffraction, (iii) synchrotron computer tomography, and (vi) high-energy X-ray diffraction, the fatigue crack initiation process and the interactions of the cracks with the first microstructural barriers were quantified. By implementing the results in a numerical modeling approach, the experimental observation that the first barrier seems to limit the VHCF life was supported.

关键词： duplex steel VHCF short cracks modeling barrier strength

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Unmanned Aerial Vehicles (UAV) Heading Optimal Tracking control Using Online Kernel-based HDP Algorithm

Unmanned Aerial Vehicles (UAV) Heading Optimal Tracking Cont...

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International Joint Conference on Neural Networks

作者： Fuxiao Tan Derong Liu Xinping Guan Bin Luo School of Computer and Information Fuyang Teachers College State Key Laboratory of Management and Control for Complex Systems Institute of Automation Chinese Academy of Sciences School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University School of Computer Science and Technology Anhui University

ISBN: (纸本)9781479914821

UAV can work in places that are dangerous, or not easy to reach for humans. However, due to active control and operating difficulties, it is still a challenge to develop fully autonomous flight in complex environments. This paper applies a novel heuristic dynamic programming for the UAV heading optimal tracking controller design, using kernel-based heuristic dynamic programming (KHDP). Kernel-based HDP is developed by integrating kernel methods and approximately linear dependence (ALD) analysis with the critic learning of HDP algorithm. Compared with conventional HDP where neural networks are widely used and their features were manually designed, the proposed algorithm can obtain better generalization capability and learning efficiency through applying the sparse kernel machine into the critic learning process of HDP algorithm. Simulation and experimental results of UAV heading optimal tracking control problems demonstrate the effectiveness of the proposed kernel-based HDP algorithm.

关键词： Kernel Algorithm design and analysis Heuristic algorithms Equations Vectors Approximation algorithms Mathematical model

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Index modulated OFDM with ICI self-cancellation in underwater acoustic communications

Index modulated OFDM with ICI self-cancellation in underwate...

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Asilomar Conference on Signals, Systems & computers

作者： Miaowen Wen Yuke Li Xiang Cheng Liuqing Yang School of Electronic and Information Engineering South China University of Technology Guangzhou China State Key Laboratory of Management and Control for Complex Systems Institute of Automation Chinese Academy of Sciences Beijing China School of Electronics Engineering and Computer Science Peking University Beijing China Department of Electrical and Computer Engineering Colorado State University Fort Collins CO USA

ISBN: (纸本)9781479982981

OFDM is promising for underwater acoustic (UWA) communications due to its potential to combat the large delay spread. However, the performance of the OFDM system is seriously deteriorated by the inter-carrier interference (ICI) caused by the transmitter/receiver motion and ocean waves. In this paper, we propose a novel ICI countermeasure. The key idea is to inactivate partial subcarriers according to index modulation and meanwhile transmit signals with opposite polarity on two adjacent active subcarriers for ICI self cancellation. Simulation results validate that the proposed scheme achieves much better bit error rate (BER) performance than many existing schemes in UWA communications.

关键词： OFDM Modulation Bit error rate Indexes Receivers Transmitters Sonar equipment

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Multistage Naive Bayes classifier with reject option for multiresolution signal representation

Multistage Naive Bayes classifier with reject option for mul...

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2nd International Conference on Pattern Recognition Applications and Methods, ICPRAM 2013

作者： Libal, Urszula Institute of Computer Engineering Control and Robotics Wroclaw University of Technology Wroclaw Poland

ISBN: (纸本)9789898565419

In the article, two approaches to pattern recognition of signals are compared: a direct and a multistage. It is assumed that there are two generic patterns of signals, i.e. a two-class problem is considered. The direct method classifies signal in one step. The multistage method uses a multiresolution representation of signal in wavelet bases, starting from a coarse resolution at the first stage to a more detailed resolutions at the next stages. After a signal is assigned to a class, the posterior probability for this class is counted and compared with a fixed level. If the probability is higher than this level, the algorithm stops. Otherwise the signal is rejected and on the next stage the classification procedure is repeated for a higher resolution of signal. The posterior probability is calculated again. The algorithm stops when the probability is higher than a fixed level and a signal is finally assigned to a class. The wavelet filtration of signal is used for feature selection and acts as a magnifier. If the posterior probability of recognition is low on some stage, the number of features on the next stage is increased by taking a better resolution. The experiments are performed for three local decision rules: naive Bayes, linear and quadratic discriminant analysis.

关键词： Probability

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Application of artificial neuron networks and hurst exponent to forecasting of successive values of a time series representing environmental measurements in an intelligent building

Application of artificial neuron networks and hurst exponent...

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14th International Conference on computer Aided Systems Theory, EUROCAST 2013

作者： Stachno, Andrzej Jablonski, Andrzej Institute of Computer Engineering Control and Robotics Wroclaw University of Technology Wroclaw Poland

ISBN: (纸本)9783642538551

control systems for intelligent buildings based on environmental measurements. The information contained in the measurement data in many cases are independent and chaotic. You can not interact with the control system, but only to monitor. In many cases, the use of measurement data for the purpose of building automation control, requires the use of forecasting systems. For the needs forecasting this type of measurement data apply artificial neural networks. Learning provides a mechanism to adjust its internal parameters of artificial neural network to characterize the trend of the time series reflects the measurement data. For time series with greater variability of smoothing is necessary. The intention initial classification time series smoothing and allows the use of artificial neural networks to forecast the next value of the time series irrespective of their volatility. © 2013 Springer-Verlag Berlin Heidelberg.

关键词： Forecasting

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The importance of behavior theory in control system modeling of physical activity sensor data

The importance of behavior theory in control system modeling...

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Annual International Conference of the IEEE engineering in Medicine and Biology Society (EMBC)

作者： William T. Riley A. Cesar Martin Daniel E. Rivera The National Cancer Institute National Institutes of Health Bethesda MD USA School of Electrical Computer and Energy Engineering Arizona State University Tempe AZ Control Systems Engineering Laboratory Transport and Energy Arizona State University Tempe AZ Arizona State University Tempe AZ US Control Systems Engineering Laboratory School of Engineering of Matter Transport and Energy Arizona State University Tempe AZ

Among health behaviors, physical activity has the most extensive record of research using passive sensors. control systems and other system dynamic approaches have long been considered applicable for understanding human behavior, but only recently has the technology provided the precise and intensive longitudinal data required for these analytic approaches. Although sensors provide intensive data on the patterns and variations of physical activity over time, the influences of these variations are often unmeasured. Health behavior theories provide an explanatory framework of the putative mediators of physical activity changes. Incorporating the intensive longitudinal measurement of these theoretical constructs is critical to improving the fit of control system model of physical activity and for advancing behavioral theory. Theory-based control models also provide guidance on the nature of the controllers which serve as the basis for just-in-time adaptive interventions based on these control system models.

关键词： Computational modeling Adaptation models Biological system modeling control systems Testing Adaptive systems

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Neural Robust Adaptive Hypersonic Flight control without Back-stepping

Neural Robust Adaptive Hypersonic Flight Control without Bac...

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2014中国制导、导航与控制学术会议

作者： Shixing Wang Fuchun Sun Yongquan Zhang Bin Xu Yiwei Zhang Department of Control Engineering Naval Aeronautical and Astronautical UniversityYantaiChina Department of Computer Science and TechnologyTsinghua UniversityBeijingChina Systems Engineering Research InstituteChina State Shipbuilding Corporation School of AutomationNorthwestern Polytechnical UniversityXi''anChina

ISBN: (纸本)9781479946983

In this paper,one robust adaptive controller is proposed for hypersonic flight dynamics with high gain observer (HGO) and neural networks (NNs).For the attitude subsystem,it contains flight path angle,pitch angle and pitch *** avoid the complex back-stepping design,the dynamics are transformed into the normal feedback *** HGO estimating the newly defined states,the controller is proposed with error feedback,NN approximation and the robust *** is proved that the NN weights and filtered tracking error are guaranteed in the semiglobal *** simulation with March 15 is conducted to show the effectiveness of the proposed method.

关键词： adaptive control aerospace control neurocontrollers robust control HGO estimating NN approximation attitude subsystem complex backstepping design error feedback filtered tracking error flight path angle high gain observer hypersonic flight dynamics neural networks neural robust adaptive hypersonic flight control normal feedback form pitch angle pitch rate robust item semiglobal sense Adaptive systems Approximation methods Artificial neural networks Educational institutions Robustness Vectors Vehicle dynamics

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Percentile-based contention window design for random access MIMO interference networks

Percentile-based contention window design for random access ...

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IEEE International Conference on Communications Workshops, ICC

作者： Zhenzhe Sun Chengnian Long Mary Ann Weitnauer Shanghai Jiao Tong University Shanghai CN Dept. of Automation Key Lab. of System Control and Information Processing Ministry of Education School of Electronic and Computer Engineering Georgia Institute of Technology Atlanta Georgia

This paper describes a new method for how interfering MIMO links might transmit more effectively in a random access network. We assume perfect transmitter-side channel state information, zero-forcing pre-coding to guarantee no interference on links that have already won access, and zero-forcing receiver processing at the still-contending links to suppress interference from the links that have already won. We define an effectiveness metric, the Instantaneous Equivalent SNR Percentile (IESP), in which the Equivalent SNR is the SNR of a single-input-single-output (SISO) link that would have the same capacity of a MIMO link after its interference constraints have been met and the IESP is the percentile of the Equivalent SNR, assuming independent Rayleigh fading. We propose that fairness among heterogeneous contending links be realized by giving the shorter contention window to the link with the higher IESP based on its own distribution, enabling links with few antennas to compete with links that have many antennas. Through simulation of the sum capacity of the winning set of links, the proposed contention window design is shown to provide a higher sum capacity than contention based on equal-sized windows.

关键词： Signal to noise ratio Receivers MIMO Interference Vectors Transmitters Frequency modulation

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Tracking changes in database schemas

Advances in Intelligent Systems and Computing

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Advances in Intelligent Systems and Computing 2013年 183 AISC卷 155-165页

作者： Marciniak, Jakub Pankowski, Tadeusz Faculty of Mathematics and Computer Science Adam Mickiewicz University Poznan Poland Institute of Control and Information Engineering Poznań University of Technology Poznań Poland

ISBN: (纸本)9783642323348

We discuss the problem of discovering changes in evolving XML schemas. Schema evolution is a natural, unavoidable phenomenon in contemporary data systems, that impacts both data transformation and query rewriting. We propose a rule-based algorithm that determines matched and unmatched schema elements thereby identifying changes in a schema under consideration. Additionally, we develop a method for computing edit distance in terms of some schema operations (insertion, deletion, renaming, and translocation). In result, we are able to obtain a set of operations which transform a given schema into the modified (target) form. The proposed algorithms have been fully implemented.

关键词： Query processing

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