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Non-Linear EEG Measures in Meditation

Journal of Biomedical Science and Engineering 2014年第9期7卷 731-738页

作者： Oldrich Vysata Martin Schatz Jakub Kopal Jan Burian Ales Procházka Kuchynka Jiri Jakub Hort Martin Valis Department of Computing and Control Engineering Institute of Chemical TechnologyPragueCzech Republic Department of Neurology Faculty of Medicine in Hradec KraloveCharles UniversityHradec KraloveCzech Republic Faculty of Informatics and Statistics University of Economics PraguePragueCzech Republic Memory Disorders Clinic Department of NeurologyCharles University in Prague2nd Faculty of Medicine and University Hospital MotolPragueCzech Republic International Clinical Research Center St.Anne’s University Hospital BrnoBrnoCzech Republic

In this study, the performance of Sevcik’s algorithm that calculates the fractal dimension and permutation entropy as discriminants to detect calming and insight meditation in electroencephalo-graphic (EEG) signals was assessed. The proposed methods were applied to EEG recordings from meditators practicing insight meditation and calming meditation before as well as during both types of meditation. Analysis was conducted using statistical hypothesis testing to determine the validity of the proposed meditation-identifying techniques. For both types of meditation, there was a statistically significant reduction in the permutation entropy. This result can be explained by the increased EEG synchronization, which is repeatedly observed in the course of meditation. In contrast, the fractal dimension (FD) was significantly increased during calming meditation, but during insight meditation, no statistically significant change was detected. Increased FD during meditation can be interpreted as an increase in self-similarity of EEG signals during self-organisation of hierarchical structure oscillators in the brain. Our results indicate that fractal dimension and permutation entropy could be used as parameters to detect both types of meditation. The permutation entropy is advantageous compared with the fractal dimension because it does not require a stationary signal.

关键词： Permutation Entropy Fractal Dimension EEG Calming Meditation Insight Meditation

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A method for data handling numerical results in parallel OpenFOAM simulations

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AIP Conference Proceedings 2015年第1期1702卷

作者： Alin Anton Sebastian Muntean ∗Faculty of Automatic Control a Computing Politehnica University of Timişoara 2nd Vasile Pârvan Ave. 300223 TM Timişoara Romania alin.anton@cs.upt.ro †Center for Advanced Research in Engineering Science Romanian Academy – Timişoara Branch 24 Mihai Viteazu Ave. 300221 TM Timişoara Romania

Parallel computational fluid dynamics simulations produce vast amount of numerical result data. This paper introduces a method for reducing the size of the data by replaying the interprocessor traffic. The results are recovered only in certain regions of interest configured by the user. A known test case is used for several mesh partitioning scenarios using the OpenFOAM toolkit®[1]. The space savings obtained with classic algorithms remain constant for more than 60 Gb of floating point data. Our method is most efficient on large simulation meshes and is much better suited for compressing large scale simulation results than the regular algorithms.

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Nonlinear discrete-time algorithm for fractional derivatives computation with application to PIλDμ controller implementation

Nonlinear discrete-time algorithm for fractional derivatives...

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6th Workshop on Fractional Differentiation and Its Applications, FDA 2013

作者： Pisano, Alessandro Nessi, Davide Usai, Elio Rapaic, Milan R. Univ. of Cagliari Cagliari Italy Faculty of Technical Sciences Computing and Control Dept. University of Novi Sad Novi Sad Serbia

ISBN: (纸本)9783902823274

This paper presents a novel algorithm for the numerical computation of fractional-order derivatives, based on a suitable generalization of a sliding-mode based robust and exact first-order differentiator (see Levant (1998)). The method inherits the robustness properties against the measurement noise of the original scheme. The algorithm is first devised in the continuous time setting, leading to a block scheme where conventional and fractional order integrators are suitably combined in a closed loop configuration containing certain "stabilizing" static non-linearities as well. All integrators are discretized by an algorithm of the Adams-Bashforth-Moulton type (cfr. Diethelm et al, (2004)) yielding an overall discrete time form of the proposed fractional differentiator. The algorithm is then applied to derive a discretized implementation formula for the PIλDμ controller. Simulation and experimental tests are carried out to verify the performance of the proposed algorithm and to compare it with other existing approaches. © 2013 IFAC.

关键词： Sliding mode control

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Collision energy mitigation through active control of future lightweight vehicle architectures

Collision energy mitigation through active control of future...

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10th International Conference on Informatics in control, Automation and Robotics, ICINCO 2013

作者： Trollope, James E. Burnham, Keith J. Control Theory and Applications Centre Faculty of Engineering and Computing Coventry University Coventry CV1 5FB United Kingdom

ISBN: (纸本)9789898565716

The paper challenges the current state-of-the-art which is accepted by the automotive industry. Present day vehicles are unsophisticatedly over-engineered and, as a consequence, are uneconomic, hence unsustainable. Vehicles currently under development, however, offer tremendous opportunities for shifting from this position to include onboard active safety systems, e.g. collision avoidance. It is argued that future vehicles should be significantly lighter and exploit the developing safety features to the full. Indeed, such a development would reduce the existing need for crashworthiness. The above arguments coupled with parallel developments in smart materials, paves the way towards a new generation of actively controlled vehicle architecture design. Whilst the move to lighter vehicles, with onboard active safety systems and actively controlled structures, may be seen as controversial, there is a convincing case for a paradigm shift towards a truly sustainable transport future.

关键词： Vehicle safety

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Policy-based self-configuration of autonomous systems information inputs

Policy-based self-configuration of autonomous systems inform...

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2013 IEEE 7th International Conference on Intelligent Data Acquisition and Advanced computing Systems, IDAACS 2013

作者： Podpora, Michal Kawala-Janik, Aleksandra Pelc, Mariusz Opole University of Technology Faculty of Electrical Engineering Automatic Control and Informaics Opole Poland University of Greenwich School of Computing and Mathematical Sciences London United Kingdom

ISBN: (纸本)9781479914265

In this paper the idea of Policy-based Input Selector, which is a framework of a highly flexible modular software interface was presented. The Policy-based Input Selector allows run-time context-sensitive and self-acting reconfiguration of information inputs in cognitive systems. The proposed solution has great application capability in autonomous and intelligent systems with multiple data inputs, such as - inter alia - vision, Laser Range Finders (LRF) or audio. Potential implementation of policies enables efficient context switching of information input and this was in detail presented and explained in this work. © 2013 IEEE.

关键词： Cognitive systems

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Automatic determination of knee kinematics for lower limb rehabilitation manipulator design

Automatic determination of knee kinematics for lower limb re...

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Workshop on Robot Motion and control

作者： Marta Kordasz Piotr Sauer Chair of Control and Systems Engineering Faculty of Computing University of Technology

ISBN: (纸本)9781467355094

This paper presents a fully automatic algorithm evaluating the knee joint kinematics on the basis of X-ray images. The practical instantaneous center of rotation (ICR) path acts as the main feature of interest. The X-ray images taken from unhealthy child subject while knee flexion, are used as an input data. A clear description of each step of the procedure is provided in the paper, i.e. the image preprocessing, morphological operations, object labeling, image stabilization, determination of bone landmarks, and calculation of ICR. The output information can be used as a basis in the design stage of lower limb rehabilitation manipulator.

关键词： images Lower Extremity Knee Joint Morphological operations kinematics Ion cyclotron resonance Knee flexion Lake Restoration Rehabilitation Imagery (Psychotherapy) Basis AUTOMATIC instant center Caste determination Sex Determination Processes

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Modular architecture of the multi-robot system for teleoperation and formation control purposes

Modular architecture of the multi-robot system for teleopera...

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Workshop on Robot Motion and control

作者： Krzysztof Kozlowski Wojciech Kowalczyk Bartlomiej Krysiak Marcin Kielczewski Tomasz Jedwabny Control and Systems Engineering Faculty of Computing Poznan University of Technology

ISBN: (纸本)9781467355094

In this paper architecture of the control system for the multiple mobile robots is presented. It was designed for teleoperation and multiagent algorithm tests. Subsystems are connected with wired or wireless links depending on their mobility and distance. The modules, their software and hardware interfaces were designed to make the system easily modifiable as different algorithms require less or more sensors, interaction, communication and computing power. The goal was to design a system on which a large number of control algorithms can run.

关键词： remote operation Computer algorithms control systems ARCHITECTURE Building construction SUB-SYSTEM multi-robot systems Mobile robots Modularity Robot System computational power

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Towards an inclusive Parkinson's screening system

Towards an inclusive Parkinson's screening system

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International Conference on System Theory, control, and computing (ICSTCC)

作者： Oana Geman Saeid Sanei Iuliana Chiuchisan Adrian Graur Aleš Procházka Oldřich Vyšata Department of Health and Human Development “Stefan eel Mare” University of Suceava Romania Department of Computer Science Electronics and Automation “Stefan cel Mare” University of Suceava Romania Faculty of Engineering and Physical Sciences University of Surrey United Kingdom Department of Computing and Control Engineering Institute of Chemical Technology Czech Republic Department of Neurology Charles University Czech Republic

In this study, brain, and gait dynamic information were combined and used for diagnosis and monitoring of Parkinson's disease (the most important Neurodegenerative Disorder). Analysis of the information corresponding to a prescribed movement involving tremor, and the related changes in brain connectivity is novel and original. Analytically, developing a space-time nonlinear adaptive system which fuses brain and gait information algorithmically is proposed here for the first time. The overall dynamic system will be constrained by the clinical impressions of the patient symptoms embedded in a knowledge-based system. The entire complex constrained problem were solved to enable a powerful model for recognition and monitoring of Parkinson's disease and establishing appropriate rules for its clinical following up.

关键词： Brain modeling Adaptation models Parkinson's disease Chaos Signal processing algorithms Nonlinear dynamical systems

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On the usefulness of higher-order disturbance observers in real control scenarios based on perturbation estimation and mitigation

On the usefulness of higher-order disturbance observers in r...

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Workshop on Robot Motion and control

作者： Rafal Madonski Przemyslaw Herman Chair of Control and Systems Engineering Faculty of Computing Poznan University of Technology

ISBN: (纸本)9781467355094

In this paper, a technique of increasing the effectiveness of estimating the overall system uncertainty with a class of high-gain disturbance observers is discussed. In theory, by introducing a particular set of additional, fictitious states to the system model, the considered observers can more effectively estimate wider variety of disturbances than in their classical forms. This work describes the verification of such theoretical statement also in practice. Both advantages and disadvantages of the proposed framework are pointed out in the paper using an Extended State Observer (ESO), that serves as an working example. An evaluation of the considered technique is carried out through a combination of numerical simulations and laboratory experiments.

关键词： disturbance observer system uncertainties Laboratory Experiments Observers perturbation

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Model-free control of a two-dimensional system based on uncertainty reconstruction and attenuation

Model-free control of a two-dimensional system based on unce...

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Conference on control and Fault-Tolerant Systems

作者： Rafal Madonski Przemyslaw Herman Chair of Control and Systems Engineering Faculty of Computing Poznan University of Technology

ISBN: (纸本)9781479928569

This paper analyses the robustness of the Model-Free control (MFC) technique. The experimental tests are conducted on a 2DOF laboratory manipulator. The multidimensional, nonlinear, time-varying, cross-coupled, and mostly unknown dynamics of the considered system makes an effective control of such plant a highly demanding task. Obtained results are compared with the outcomes of a classical PID controller, widely used in industrial applications. The gathered experimental data makes the MFC a powerful fault-tolerant approach, that can eventually grow to a noticeable alternative to the controllers used in engineering practice nowadays.

关键词： Multidimensional systems Free control Proportional Integral Derivative control Attenuation controllers Engineering Practice Reconstructive Surgical Procedures Standing Orders cross coupling Fault tolerance

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