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The 8th World Congress on Intelligent control and Automation(第八届智能控制与自动化世界大会 WCICA 2010)

作者： Bin Zhou Zongli Lin Guang-Ren Duan Center for Control Theory and Guidance Technology Harbin Institute of Technology Harbin 150001Chi Charles L.Brown Department of Electrical and Computer Engineering University of VirginiaP.O.Box 400 Center for Control Theory and Guidance Technology Harbin Institute of TechnologyHarbin 150001 Ch

This paper is concerned with stabilization of linear systems with arbitrarily large and bounded (time-varying) delay in the actuator. A new class of feedback laws based on poleassignment low gain design is proposed to solve the problem. Both delay-dependent and delay-independent results are presented and a series of sufficient conditions for guaranteeing the stability of the closed-loop system is presented. By using properties of this class of new feedback laws and the properties of some transcendental equations, exact zeros distribution of the closed-loop system is discussed. As a result, necessary and sufficient condition is given to guarantee the stability of the closed-loop system. All the conditions given in the paper are independent of the low gain parameter and are convenient to use in practice. Numerical example is given to illustrate the effectiveness of the proposed approach.

关键词： Delay Polynomials Eigenvalues and eigenfunctions Stability criteria Linear systems

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A Parametric Periodic Lyapunov Equation with Application in Semi-global Stabilization of Discrete-Time Periodic Systems Subject to Actuator Saturation

A Parametric Periodic Lyapunov Equation with Application in ...

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American control Conference

作者： Bin Zhou Guang-Ren Duan Zongli Lin Center for Control Theory and Guidance Technology Harbin Institute of Technology Harbin Heilongjiang 150001 China Charles L. Brown Department of Electrical and Computer Engineering University of Virginia Charlottesville VA 22904-4743 U.S.A.

ISBN: (纸本)9781424474264

This paper is concerned with semi-global stabilization of discrete-time linear periodic systems subject to actuator saturation. Provided that the open loop characteristic multipliers are within the closed unit circle, a low gain feedback design approach is proposed to solve the problem by state feedback. Our approach is based on the solution to a parametric discrete-time periodic Lyapunov equation. The proposed approaches not only generalize the corresponding results for time-invariant systems to periodic systems, but also reveal some important intrinsic properties of this class of periodic matrix equations. A numerical example is worked out to illustrate the effectiveness of the proposed approaches.

关键词： Periodic system Lyapunov equation State feedback discrete-time Time invariant systems discrete time systems Periodic Unit circle actuators Parametric

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On Distributed Order Low-Pass Filter

On Distributed Order Low-Pass Filter

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2010 IEEE/ASME International Conference on Mechatronic and Embedded System and Applications(2010 IEEE 机电一体化和嵌入式系统与应用国际会议)

作者： Yan Li Hu Sheng YangQuan Chen School of Control Science and Engineering Shandong UniversityJinan Shandong 250061 P. R. China. Department of Electronic Engineering Dalian University of TechnologyDalian 116024 P. R. China. Center for Self-Organizing and Intelligent Systems (CSOIS) Department of Electrical and Computer En

In this paper, we derive the impulse response of the fractional distributed order low-pass filters. Based on the derived analytical impulse response, a method on how to perform the discretization of the above distribu... 详细信息

关键词： computer languages

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An inventory of potentially habitable environments on Mars: Geological and biological perspectives

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Special Paper of the Geological Society of America 2011年 483卷 317-347页

作者： Dohm, J.M. Miyamoto, H. Ori, G.G. Fairén, A.G. Davila, A.F. Komatsu, G. Mahaney, W.C. Williams, J.-P. Joye, S.B. Di Achille, G. Oehler, D.Z. Marzo, G.A. Schulze-Makuch, D. Acocella, V. Glamoclija, M. Pondrelli, M. Boston, P. Hart, K.M. Anderson, R.C. Baker, V.R. Fink, W. Kelleher, B.P. Furfaro, R. Gross, C. Hare, T.M. Frazer, A.R. Ip, F. Allen, C.C.R. Kim, K.J. Maruyama, S. McGuire, P.C. Netoff, D. Parnell, J. Wendt, L. Wheelock, S.J. Steele, A. Hancock, R.G.V. Havics, R.A. Costa, P. Krinsley, D. Department of Hydrology and Water Resources University of Arizona Tucson AZ United States University Museum Tokyo Japan International Research School of Planetary Sciences Università d'Annunzio Pescara Italy Space Sciences and Astrobiology Division National Aeronautics and Space Administration Ames Research Center Moffett Field CA United States SETI Institute Mountain View CA United States Planetary Exploration Research Center Chiba Institute of Technology Chiba Japan Quaternary Surveys Toronto ON Canada Division of Geological and Planetary Sciences California Institute of Technology Pasadena CA United States Ashima Research Pasadena CA United States Department of Marine Sciences University of Georgia Athens GA United States Laboratory for Atmospheric and Space Physics University of Colorado Boulder CO United States Astromaterials Research and Exploration Science NASA Johnson Space Center Houston TX United States Bay Area Environmental Research Institute Sonoma CA United States School of Earth and Environmental Sciences Washington State University Pullman WA United States Dipartimento Science Geologiche Università Roma Tre Rome Italy Geophysical Laboratory Carnegie Institution of Washington Carnegie WA United States Department of Earth and Environmental Science New Mexico Tech Socorro NM United States School of Chemical Sciences Dublin City University Dublin Ireland Jet Propulsion Laboratory California Institute of Technology Pasadena CA United States Division of Physics Mathematics and Astronomy California Institute of Technology Pasadena CA United States Departments of Electrical and Computer Engineering and Biomedical Engineering University of Arizona Tucson AZ United States Department of Aerospace and Mechanical Engineering University of Arizona Tucson AZ United States Institute of Geological Sciences-Planetary Sciences and Remote Sensing Freie Universität Berlin Malteserstrasse Berlin Germany U.S. Geological Survey Flagstaff

ISBN: (纸本)9780813724836

On Earth, biology, hydrology, and geology are interlinked such that certain types of life are often associated with specifi c conditions, including rock type, pressure, temperature, and chemistry. Life on Earth has established itself in diverse and extreme niches, presenting the possibility that Mars, too, may hold records of fossilized and/or extant life in diverse environments. Geologic, paleohydrologic, and climatic conditions through the evolution of Mars are similar in many respects to conditions occurring during the evolution of Earth and, as such, may point to environments on Mars with potential to have supported living systems. Here, we discuss examples of those Martian settings. Such extraterrestrial environments should be targeted by international robotic and/or manned missions to explore potential fossilized or extant life on Mars. © 2011 Geological Society of America.

关键词： Geology

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Frequency domain surface EMG sensor fusion for estimating finger forces

Frequency domain surface EMG sensor fusion for estimating fi...

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

作者： Chandrasekhar Potluri Parmod Kumar Madhavi Anugolu Alex Urfer Steve Chiu D. Subbaram Naidu Marco P. Schoen Measurement and Control Engineering Research Center MCERC Idaho State University Pocatello ID USA MCERC Idaho State University Pocatello ID USA Department of Physical and Occupational Therapy Idaho State University Pocatello ID USA Department of Electrical Engineering and Computer Science MCERC Idaho State University Pocatello ID USA Department of Mechanical Engineering MCERC Idaho State University Pocatello ID USA

Extracting or estimating skeletal hand/finger forces using surface electro myographic (sEMG) signals poses many challenges due to cross-talk, noise, and a temporal and spatially modulated signal characteristics. Normal sEMG measurements are based on single sensor data. In this paper, array sensors are used along with a proposed sensor fusion scheme that result in a simple Multi-Input-Single-Output (MISO) transfer function. Experimental data is used along with system identification to find this MISO system. A Genetic Algorithm (GA) approach is employed to optimize the characteristics of the MISO system. The proposed fusion-based approach is tested experimentally and indicates improvement in finger/hand force estimation.

关键词： Force Electromyography Muscles Transfer functions Sensor fusion Force measurement

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Arousing feedback rectifies lapse in performance and corresponding EEG power spectrum

Arousing feedback rectifies lapse in performance and corresp...

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

作者： Tzyy-Ping Jung Kuan-Chih Huang Chun-Hsiang Chuang Jian-Ann Chen Li-Wei Ko Tzai-Wen Chiu Chin-Teng Lin Institute of Neural Computation and Swartz Center of Computational Neuroscience University of California La Jolla CA USA Institute of Electrical Control Engineering and Brain Research Center National Chiao Tung University Hsinchu Taiwan Brain Research Center National Chiao Tung University Hsinchu Taiwan Department of Biological Science and Technology and Brain Research Center National Chiao Tung University Hsinchu Taiwan

This study explores electroencephalographic (EEG) dynamics and behavioral changes in response to arousing auditory signals presented to individuals experiencing momentary cognitive lapses. Arousing auditory feedback was delivered to the subjects in half of the non-responded lane-deviation events during a sustained-attention driving task, which immediately agitated subject's responses to the events. The improved behavioral performance was accompanied by concurrent power suppression in the theta- and alpha-bands in the lateral occipital cortices. This study further explores the feasibility of estimating the efficacy of arousing feedback presented to the drowsy subjects by monitoring the changes in EEG power spectra.

关键词： Electroencephalography Driver circuits Testing Support vector machines Scalp Vehicle dynamics Visualization

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Spectral clustering approach with sparsifying technique for functional connectivity detection in the resting brain

Spectral clustering approach with sparsifying technique for ...

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International Conference on Intelligent and Advanced Systems, ICIAS

作者： Mahdi Ramezani Amin Heidari Emad Fatemizadeh Hamid Soltanian-Zadeh Biomedical Signal and Image Processing Laboratory Sharif University of Technology Tehran Iran Radiology Image Analysis Laboratory Henry Ford Health System Detroit MI USA Control and Intelligent Processing Center of Excellence Electrical and Computer Engineering Department University of Tehran Iran

The aim of this study is to assess the functional connectivity from resting state functional magnetic resonance imaging (fMRI) data. Spectral clustering algorithm was applied to the realistic and real fMRI data acquired from a resting healthy subject to find functionally connected brain regions. In order to make computation of the spectral decompositions of the entire brain volume feasible, the similarity matrix has been sparsified with the t-nearest-neighbor approach. Realistic data were created to investigate the performance of the proposed algorithm and comparing it to the recently proposed spectral clustering algorithm with the Nystrom approximation and also with some well-known algorithms such as the Cross Correlation Analysis (CCA) and the spatial Independent Component Analysis (sICA). To enhance the performance of the methods, a variety of data pre and post processing steps, including data normalization, outlier removal, dimensionality reduction by using wavelet coefficients, estimation of number of clusters and optimal number of independent components (ICs). Results demonstrate the applicability of the proposed algorithm for functional connectivity analysis.

关键词： Clustering algorithms Algorithm design and analysis Correlation Approximation methods Independent component analysis Time series analysis Approximation algorithms

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Fault detection for linear discrete time-varying systems

Fault detection for linear discrete time-varying systems

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IEEE Conference on Decision and control

作者： Xiaobo Li Song-Feng Mo Kemin Zhou Institute of Aerospace Studies University of Toronto Toronto ONT Canada Color Control Competency Center Marking and Imaging Integration Global Product Delivery Group Xerox Corporation Webster NY USA Department of Electrical and Computer Engineering Louisiana State University Baton Rouge LA USA

ISBN: (纸本)9781424477456

Several robust fault detection problems for linear discrete time-varying systems have been given in this paper. It is shown that the optimal robust detection filters for those well-recognized robust fault detection problems, such as ℋ-/ℋ ∞ , ℋ 2 /ℋ ∞ and ℋ ∞ /ℋ ∞ problems, have the same observer structure, whose gain can be obtained by solving a standard difference Riccati equation. Furthermore, the solution is also extended to the case when the initial state is nonzero. Finally, an example is used to illustrate our results.

关键词： Fault detection Time varying systems Riccati equations Linear systems Noise measurement Neodymium

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Passive sources for the Bennett-Brassard 1984 quantum-key-distribution protocol with practical signals

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Physical Review A 2010年第5期82卷 052325-052325页

作者： Marcos Curty Xiongfeng Ma Hoi-Kwong Lo Norbert Lütkenhaus ETSI Telecomunicación Department of Signal Theory and Communications University of Vigo Campus Universitario E-36310 Vigo Pontevedra Spain Institute for Quantum Computing & Department of Physics and Astronomy University of Waterloo Waterloo Ontario N2L 3G1 Canada Center for Quantum Information and Quantum Control Department of Physics and Department of Electrical & Computer Engineering University of Toronto Toronto Ontario M5S 3G4 Canada

Most experimental realizations of quantum key distribution are based on the Bennett-Brassard 1984 (the so-called BB84) protocol. In a typical optical implementation of this scheme, the sender uses an active source to produce the required BB84 signal states. While active state preparation of BB84 signals is a simple and elegant solution in principle, in practice passive state preparation might be desirable in some scenarios, for instance, in those experimental setups operating at high transmission rates. Passive schemes might also be more robust against side-channel attacks than active sources. Typical passive devices involve parametric down-conversion. In this paper, we show that both coherent light and practical single-photon sources are also suitable for passive generation of BB84 signal states. Our method does not require any externally driven element, but only linear optical components and photodetectors. In the case of coherent light, the resulting key rate is similar to the one delivered by an active source. When the sender uses practical single-photon sources, however, the distance covered by a passive transmitter might be longer than that of an active configuration.

关键词： Side channel attack

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Multiple-atlas-based automatic sementation of hippocampus for lateralization in temporal lobe epilepsy

Multiple-atlas-based automatic sementation of hippocampus fo...

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IEEE International Symposium on Biomedical Imaging

作者： Alireza Akhondi-Asl Kourosh Jafari-Khouzani Hamid Soltanian-Zadeh Image Analysis Laboratory Department of Diagnostic Radiology Henry Ford Health System Detroit MI USA School of Cognitive Sciences Institute of Studies in Theoretical Physics and Mathematics Tehran Iran Control and Intelligent Processing Center of Excellence School of Electrical and Computer Engineering University of Tehran Tehran Iran

ISBN: (纸本)9781424441259

We introduce a 3D segmentation framework which uses principal shapes. The probabilistic energy function of the method is defined based on intensity, tissue type, and location information of the structures using a multiple atlas method. For intensity information, nonparametric probability density function is used which considers intensity relation of different structures. To find a local minimum of the energy function, a two-step optimization strategy is used. In the first step, shape parameters are optimized based on the analytic derivatives of the energy function. In the second step, shapes of the structures are fine-tuned using a level set method. The proposed method is shown to be superior to some popular methods in the literature using a dataset of 64 patients with mesial temporal lobe epilepsy. In addition, the method can be used for lateralization with accuracy close to that of manual segmentation.

关键词： Hippocampus Temporal lobe Epilepsy Image segmentation Principal component analysis Shape control Probability density function Level set Skull Algorithm design and analysis

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