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25th IASTED International Conference on Modelling, Identification, and control, MIC 2006

作者： Fazekas, Csaba Szederkényi, G. Hangos, K.M. Process Control Research Group Computer and Automation Research Institute HAS P.O. Box 63 H-1518 Budapest Hungary

ISBN: (纸本)0889865515

The methods of nonlinear systems and control theory were applied to a simple musculoskeletal system with one joint and two muscles in this paper. For this purpose, a nonlinear input-affine state-space model has been developed for this system with a flexor and an extensor muscle taking into account the nonlinear muscle and movement dynamics. Two types of controllers were designed: a linear pole-placement servo designed for the locally linearized model, and a nonlinear controller based on asymptotic output tracking method. It is expected and forward that during a movement with a large range of motion the nonlinearities of the system will be dominant and the nonlinear methods will outperform the linear ones. The output reference tracking properties of the controllers have been investigated by simulation and it has been found that the nonlinear controller gives more accurate tracking with no overshoots than the linear one.

关键词： Muscle

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Workshop on imaging science development for cancer prevention and preemption

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Cancer Biomarkers 2007年第1期3卷 1-33页

作者： Kelloff, Gary J. Sullivan, Daniel C. Baker, Houston Clarke, Lawrence P. Nordstrom, Robert Tatum, James L. Dorfman, Gary S. Jacobs, Paula Berg, Christine D. Pomper, Martin G. Birrer, Michael J. Tempero, Margaret Higley, Howard R. Petty, Brenda Gumbs Sigman, Caroline C. Maley, Carlo Sharma, Prateek Wax, Adam Ginsberg, Gregory G. Dannenberg, Andrew J. Hawk, Ernest T. Messing, Edward M. Grossman, H. Barton Harisinghani, Mukesh Bigio, Irving J. Griebel, Donna Henson, Donald E. Fabian, Carol J. Ferrara, Katherine Fantini, Sergio Schnall, Mitchell D. Zujewski, Jo Anne Hayes, Wendy Klein, Eric A. DeMarzo, Angelo Ocak, Iclal Ketterling, Jeffrey A. Tempany, Clare Shtern, Faina Parnes, Howard L. Gomez, Jorge Srivastava, Sudhir Szabo, Eva Lam, Stephen Seibel, Eric J. Massion, Pierre McLennan, Geoffrey Cleary, Kevin Suh, Robert Burt, Randall W. Pfeiffer, Ruth M. Hoffman, John M. Roy, Hemant K. Wang, Thomas Limburg, Paul J. El-Deiry, Wafik S. Papadimitrakopoulou, Vali Hittelman, Walter N. MacAulay, Calum Veltri, Robert W. Solomonzz, Diane Jeronimo, Jose Richards-Kortum, Rebecca Johnson, Karen A. Viner, Jaye L. Stratton, Steven P. Rajadhyaksha, Milind Dhawan, Atam NIH/NCI/DCTD Cancer Imaging Program Bethesda MD United States NIH/NCI/DCTD Cancer Imaging Program NCI-Frederick Frederick MD United States NIH/NCI/DCP Early Detection Research Group Bethesda MD United States The Johns Hopkins University School of Medicine Departments of Radiology Pharmacology and Oncology Division of Neuroradiology Baltimore MD United States NIH/NCI/CCR Cell and Cancer Biology Branch Bethesda MD United States University of California San Francisco Department of Medicine Division of Medical Oncology San Francisco CA United States CCS Associates Inc. Mountain View CA United States Wistar Institute Molecular and Cellular Oncogenesis Program Philadelphia PA United States University of Kansas School of Medicine VA Hospital Kansas City MO United States Duke University Department of Biomedical Engineering Medical Physics Program Durham NC United States University of Pennsylvania School of Medicine Department of Gastroenterology Philadelphia PA United States New York Presbyterian Hospital Weill Medical College of Cornell University New York NY United States NIH/NCI/OD Office of Centers for Training and Resources Bethesda MD United States University of Rochester Medical Center Department of Urology Rochester NY United States University of Texas MD Anderson Cancer Center Department of Urology Houston TX United States Massachusetts General Hospital Abdominal Imaging/Interventional Radiology Boston MA United States Boston University Biomedical Engineering Electrical and Computer Engineering and Physics Boston MA United States NIH/NCI/DCP Gastrointestinal and Other Cancers Research Group Bethesda MD United States The George Washington University Cancer Institute Office of Cancer Prevention and Control Washington DC United States University of Kansas Cancer Center Clinical Oncology Kansas City KS United States University of California Davis Department of Biomedical Engineering Davis CA United States Tufts University De

The concept of intraepithelial neoplasm (IEN) as a near-obligate precursor of cancers has generated opportunities to examine drug or device intervention strategies that may reverse or retard the sometimes lengthy process of carcinogenesis. Chemopreventive agents with high therapeutic indices, well-monitored for efficacy and safety, are greatly needed, as is development of less invasive or minimally disruptive visualization and assessment methods to safely screen nominally healthy but at-risk patients, often for extended periods of time and at repeated intervals. Imaging devices, alone or in combination with anticancer drugs, may also provide novel interventions to treat or prevent precancer.

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Comparison of seven approaches for holter ECG clustering and classification

Comparison of seven approaches for holter ECG clustering and...

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29th Annual International Conference of the IEEE engineering in Medicine and Biology Society (EMBS 2007), vol.10

作者： Vaclav Chudacek Milan Petrik George Georgoulas Miroslav Cepek Lenka Lhotska Chrysostomos Stylios Gerstner laboratory at Department of Cybernetics Czech Technical University Czech Republic Czech Republic Department of Cybernetics Center for Machine Perception Czech Technical University Czech Republic Intelligent Control Systems Laboratory Georgia Technology Research Institute Atlanta USA Czech Republic Department of Computer Science and Engineering Neural Computing Group Czech Technical University Czech Republic Czech Republic Department of Cybernetics Gerstner Laboratory Czech Technical University Czech Republic Department of Informatics and Communications Technology TEI Epirus Artas Greece

In this work we present a comparative study, testing selected methods for clustering and classification of holter electrocardiogram (ECG). More specifically we focus on the task of discriminating between normal 'N' beats and premature ventricular 'V' beats. Some of the tested methods represent the state of the art in pattern analysis, while others are novel algorithms developed by us. All the algorithms were tested on the same datasets, namely the MIT-BIH and the AHA databases. The results for all the employed methods are compared and evaluated using the measures of sensitivity and specificity.

关键词： Electrocardiography Testing Decision trees Laboratories Cybernetics Sensitivity and specificity Heart rate variability Clustering algorithms Spatial databases Computational complexity

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BAYESIAN QUBIT STATE ESTIMATION

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IFAC Proceedings Volumes 2006年第1期39卷 949-954页

作者： Attila Magyar Dénes Petz Katalin M. Hangos Process Control Research Group Computer and Automation Research Institute Budapest Hungary Alfréd Rényi Institute of Mathematics Budapest Hungary

In this paper a Bayesian approach for estimating the state of a qubit is proposed. It consists of two phases. First a component-wise separate Bayesian estimate of the Bloch vector components is calculated in the form of β -distributions. Then a regularization step is performed to respect the constraint that the Bloch vector must be in the unit ball. The properties of the proposed algorithm are investigated by simulation.

关键词： System identification Bayesian estimation quantum systems regularization

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Single landmark based self-localization of mobile robots

Single landmark based self-localization of mobile robots

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3rd Canadian Conference on computer and Robot Vision, CRV 2006

作者： Bais, Abdul Sablatnig, Robert Gu, Jason Institute of Computer Technology Vienna University of Technology Vienna Austria Pattern Recognition and Image Processing Group Institute of Computer Aided Automation Vienna University of Technology Vienna Austria Robotics Research Group Department of Electrical and Computer Engineering Dalhousie University Halifax Canada

ISBN: (纸本)0769525423

In this paper we discuss landmark based absolute localization of tiny autonomous mobile robots in a known environment. Landmark features are naturally occurring as it is not allowed to modify the environment with special navigational aids. These features are sparse in our application domain and are frequently occluded by other robots. This makes simultaneous acquisition of two or more landmarks difficult. Therefore, we propose a system that requires a single landmark feature. The algorithm is based on range measurement of a single landmark from two arbitrary points whose displacement can be measured using dead-reckoning sensors. Range estimation is done with a stereo vision system. Simulation results show that the robot can localize itself if it can estimates range of the same landmark from two different position and if the displacement between the two position is known. © 2006 IEEE.

关键词： Mobile robots

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Fuel cell model for three-phase inverter

Fuel cell model for three-phase inverter

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1st International Power and Energy Conference (PECon 2006)

作者： Younis, M. A. A. Rahim, N. A. Mekhilef, S. Department of Electrical Engineering University Tenaga Nassional (UNITEN) Malaysia Department of Electrical Engineering UM Malaysia Power Electronics Research Group UNITEN Department of Electrical Engineering University of Malaya Center for Research Power Electronics and Drives Automation and Control Institutions of Electrical Engineers United Kingdom Institute of Electrical and Electronics Engineers IEEE

ISBN: (纸本)9781424402731

This paper presents a fuel cell model supplying three-phase dc/ac inverter. Simulink used as interactive tool to model the proposed fuel cell system. The fuel cell output voltage is proportional to the change of the air (oxidant) pressure, the hydrogen (fuel) pressure and the current withdrawn from the fuel cell. Three-phase dc/ac inverter used to supply the ac load. Symmetric Space Vector Pulse Width Modulation used to drive the three-phase inverter so that minimum harmonic distortion on the load side voltage and current. Simulation results provided to validate the design.

关键词： fuel cell model space vector pulse width modulation three-phase inverter

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Singular perturbation control for vibration rejection in HDDs with a PZT active suspension

Singular perturbation control for vibration rejection in HDD...

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45th IEEE Conference on Decision and control 2006, CDC

作者： Pang, Chee Khiang Lewis, Frank L. Ge, Sam Shuzhi Guo, Xiao Chen, Ben M. Lee, Tong Heng IEEE Central Research Laboratory Research and Development Group Hitachi Ltd. 2880 Kozu Odawara Kanagawa 256-8510 Japan A STAR Data Storage Institute Singapore Singapore Department of Electrical and Computer Engineering National University of Singapore Singapore Singapore Advanced Controls and Sensors Group Automation and Robotics Research Institute University of Texas Arlington United States

ISBN: (纸本)1424401712

In this paper, the SPT (Singular Perturbation Theory) is applied to decompose the VCM's (Voice Coil Motor) and induced PZT active suspension's dynamics into fast and slow subsystems, respectively. The control system is decomposed into fast and slow time scale for controller designs, and control effectiveness is increased to tackle more DOFs (Degrees-Of-Freedom) via inner loop vibration suppression with measured high frequency VCM's and PZT active suspension's dynamics from the piezoelectric elements in the suspension. Experimental results on a commercial HDD with LDV (Laser Doppler Vibrometer) show effective suppression of the VCM and PZT active suspension's flexible resonant modes as well as an improvement of 39.9% in 3σ PES (Position Error Signal) during track following when compared to conventional notch-based servos. © 2006 IEEE.

关键词： Hard disk storage

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DYNAMIC ANALYSIS AND control OF CHEMICAL AND BIOCHEMICAL REACTION NETWORKS

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IFAC Proceedings Volumes 2006年第2期39卷 165-170页

作者： Irene Otero-Muras Gábor Szederkényi Antonio A. Alonso Katalin M. Hangos Department of Process Engineering IIM-CSIC Eduardo Cabello 6 36208 Vigo Spain Process Control Research Group Computer and Automation Research Institute H-1518 Budapest P.O.Box 63 Hungary

Metabolic or cell signalling pathways are examples of biochemical networks exhibiting possible complex dynamics in the form of steady-state multiplicity, sustained oscillations or even deterministic chaos. The origin of these nonlinear phenomena is not always well understood, nor it can be systematically predicted beyond a case by case basis. Despite considerable progress in dynamic aspects, efforts are still needed to develop efficient and robust methods of stabilization and control of reaction networks. In this work, we combine concepts and tools from irreversible thermodynamics and systems theory to explore the underlying dynamic properties of a general class of chemical and biochemical networks. Lyapunov and passivity based methods are given for the systematic design of globally stabilizing feedback controllers in both the concentration space and a novel minimal description of the kinetic networks dynamics: the reaction space.

关键词： biochemical reaction networks passivity nonlinear control entropy

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Bayesian decision-theoretic causation analysis for gas explosion

Bayesian decision-theoretic causation analysis for gas explo...

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2006 IEEE International Conference on Mechatronics and automation, ICMA 2006

作者： Cai, Linqin Sun, Yining Mei, Tao Zuchang, Ma Department of Automation Chinese Academy of Sciences University of Science and Technology of China Hefei China Institute of Computer Application Chinese Academy of Engineering Physics Mianyang China Center for Biomimetic Sensing and Control Research Institute of Intelligent Machine Chinese Academy of Sciences Hefei China

ISBN: (纸本)1424404665

Frequent mine gas incident in china fully shows there must be many undiscovered essential factors in all previous gas incident investigations. Exploring a new analysis approach is vital to prevent and control mine gas emergency. A Bayesian decision-theoretic causation analysis method was introduced to study the mine gas incident. A typical gas explosion case was explained. The interaction law of human, machine, environment, and management factors causing mine gas incident was discussed. The evolution process of the connotative factors from the uncertain state to the certain state was discovered, and the relationships between the external factors and the internal factors were revealed. © 2006 IEEE.

关键词： Decision trees

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Modeling and analyzing multi-agent task plans for intelligent virtual training system using petri nets

Modeling and analyzing multi-agent task plans for intelligen...

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6th World Congress on Intelligent control and automation, WCICA 2006

作者： Linqin, Cai Tao, Mei Yining, Sun Lei, Sun Zuchang, Ma Department of Automation University of Science and Technology of China Chinese Academy of Sciences Hefei China Institute of Computer Application Chinese Academy of Engineering Physics Mianyang China Center for Biomimetic Sensing and Control Research Institute of Intelligent Machine Chinese Academy of Sciences Hefei China

ISBN: (纸本)1424403324

Integrated virtual reality with Intelligent Tutoring System, a multi-agent architecture was proposed for intelligent virtual training system (IVTS) for mine safety training. In order to make sure IVTS agent's task plans are reliable and adaptive, a Petri nets-based declarative method was applied to model the virtual training task planning knowledge, which was represented as task planning knowledge Petri nets (TP-PNets), and an algorithm was implemented to construct TP-PNets. Then, Hierarchy Colored Petri Nets (HCPN) was used to model multi-agent task planning behaviors for IVTS, and simulation and message sequence chart was used to analyze and verify the agent task planning HCPN model. ©2006 IEEE.

关键词： Intelligent systems

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