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Joint Meeting of the International Symposium on Noninvasive Functional Source Imaging of the Brain and Heart and the International Conference on Functional Biomedical Imaging (NFSI-ICFBI)

作者： Uwe Graichen Roland Eichardt Patrique Fiedler Daniel Strohmeier Jens Haueisen Institute of Biomedical Engineering and Informatics Faculty of Computer Science and Automation Ilmenau University of Technology Ilmenau Germany

Electroencephalography is an important diagnostic tool for functional investigations of the human brain. Recent EEG measurement technologies provide high numbers of electrodes and sampling rates, which results in a considerable quantity of data. For the analysis of this EEG data, efficient signal analysis and decomposition methods are essential. In this paper a new method for spatial harmonic analysis of EEG data using the Laplacian eigenspace of the meshed surface of electrode positions is presented. The resulting eigenspace enables the spatial harmonic analysis, filtering, denoising and decomposition of EEG data. For a proof of concept, the proposed approach is applied to an 128 channel EEG recording of visual evoked potentials. A set of harmonic spatial basis functions for the EEG electrode setup is estimated. The EEG data are spatially decomposed and low pass filtered using the harmonic spatial basis functions.

关键词： Electroencephalography Laplace equations Electrodes Harmonic analysis Eigenvalues and eigenfunctions Symmetric matrices Time frequency analysis

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Modeling and control of system with pump and pipeline by pole placement method

Modeling and control of system with pump and pipeline by pol...

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MECHATRONIKA International Symposium

作者： Tomas Brezina Jiri Kovar Tomas Hejc Faculty of Mechanical Engineering Institute of Automation and Computer Science Brno University of Technology Brno Czech Republic

The present paper deals with control of system consists surge tank, pump a and pipeline. Model of this system is based on hydro-electrical analogy. For purpose of control it is designed a regulator with estimator. Regulator is developed by pole-placement method. Numerical solutions of this model are presented at the end of this article.

关键词： Mathematical model Pipelines Numerical models Control systems Equations Computational modeling Surges

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Ensuring diversity in a backtrack and GA optimization method for delivery schedule

Ensuring diversity in a backtrack and GA optimization method...

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7th International Conference on Signal Image Technology and Internet-Based Systems, SITIS 2011

作者： Sakurai, Yoshitaka Takada, Kouhei Tsukamoto, Natsuki Onoyama, Takashi Knauf, Rainer Tsuruta, Setsuo School of Information Environment Tokyo Denki University Chiba Japan Research and Development Department Hitachi Software Engineering Co.Ltd. Tokyo Japan Faculty of Computer Science and Automation Ilmenau Univ. of Technology Ilmenau Germany

ISBN: (纸本)9780769546353

Delivery route optimization greatly improves the delivery efficiency in terms of all resources including human resources and energy consumption. In our application scenario the distribution network requires solving several tens to hundreds (max. 1500-2000) cities Traveling Salesman Problems (TSP) within interactive response time (around 3 seconds) with expert-level accuracy (below 3% level of error rate). Moreover, since domain experts have to adjust the solutions due to boundary conditions that can not be formally expressed (such as human convenience, road conditions, and social aspects), understandability and flexibility of the applied heuristics are necessary. To meet all these requirements, a Backtrack and Restart Genetic Algorithm (Br-GA) was proposed. This method combines Backtracking and GA having simple heuristics such as 2-opt and NI (Nearest Insertion) so that, in case of stagflation, GA can restarts with the state of populations going back to the state in the generation before stagflation. Here, a refinement of this algorithm is introduced, which aims at ensuring diversity of initial solutions, which are subject to mutation. We introduce a formal definition of a diversity degree as well as a technique to compose new random individuals, which follow a required degree of diversity. © 2011 IEEE.

关键词： Genetic algorithms

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Modeling and simulation of water fountain control software in ptolemy II

Advances in Intelligent and Soft Computing

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Advances in Intelligent and Soft Computing 2011年 105卷 219-224页

作者： Zhang, Ying Zhang, Jing Faculty of Information Engineering and Automation Computer Technology Application Key Lab of Yunnan Province Kunming University of Science and Technology Kunming Yunnan China

ISBN: (纸本)9783642237553

There are two methods to design software model, object-oriented and component-oriented. Embedded system has the characteristics of real-time, hierarchy and heterogeneousness. Disadvantage of object-oriented method is so much functional coupling that system's characteristics cannot be described well. Component-oriented method can meet the system's characteristics well because of components independent from each other. We introduce actor-oriented Ptolemy II modeling method, using atomic actor and composite actor by tree structure to solve hierarchy of the system, and using different computation model interaction to solve real-time heterogeneity of the system. This paper describes the principle of small water fountain control software and compares the advantages and disadvantages between component-oriented Ptolemy II platform and object-oriented UML modeling. Water fountain control software is modeled in the form of different actor-oriented components and then simulates based on Ptolemy II platform. As a result, expected result is achieved. © 2011 Springer-Verlag Berlin Heidelberg.

关键词： Trees (mathematics)

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Robust H∞ control of switched uncertain time-varying delay discrete-time systems via dynamic output feedback

Robust H∞ control of switched uncertain time-varying delay ...

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7th International Conference on Electrical and Electronics engineering, ELECO 2011

作者： Song, Zhengui Dimirkovsky, Gyorgyi Zhao, Jun Institute of Integrated Process Automation College of Information Science and Engineering Northeastern University Shenyang Liaoning 110004 China Departments of Computer Eng. and Control Eng. Faculty of Engineering Dogus University Acibadem Zeamet Sokak 21 Kadikoy TR-34722 Istanbul Turkey Institute of Automation and Systems Eng. Faculty of Electrical Eng. and Info. Technologies SS Cyril and Methodius University Karpos 2 BB MK-1000 Skopje Macedonia

ISBN: (纸本)9786050102048

Robust H∞ output feedback control problem for a class of switched linear discrete-time systems possessing norm-bounded uncertainty and time-varying delay is investigated. A switched dynamic output feedback controller is sought that can robust exponentially stabilize and reduce to a prescribed level the effect of disturbance input on the controlled output in the closed loop. A delay-dependent linear matrix inequality based sufficient condition for the problem to be solvable is derived via the switched Lyapunov functions. Controller design is performed by solving a set of linear matrix inequalities. An illustrative example along with simulation results is given to demonstrate the validity of these novel derivations. © 2011 Chamber of Turkish Electric.

关键词： Linear matrix inequalities

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Sliding mode control of switched uncertain linear systems: Designing robust H∞ sliding surface

Sliding mode control of switched uncertain linear systems: D...

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7th International Conference on Electrical and Electronics engineering, ELECO 2011

作者： Lian, Jie Dimirkovsky, Gyorgyi Zhao, Jun Institute of Integrated Process Automation College of Information Science and Engineering Northeastern University Shenyang Liaoning 110004 China Departments of Computer Eng. and Control Eng. Faculty of Engineering Dogus University Acibadem Zeamet Sokak 21 Kadikoy TR-34722 Istanbul Turkey Institute of Automation and Systems Eng. Faculty of Electrical Eng. and Info. Technologies SS Cyril and Methodius University Karpos 2 BB MK-1000 Skopje Macedonia

ISBN: (纸本)9786050102048

The robust H∞ control problem for a class of uncertain switched linear systems by using the variable structure control is investigated. A robust H∞ single sliding surface is shown to exist as long as a convex combination of the subsystems of the switched system is robustly stabilizable with disturbance attenuation level γ. A switching law is constructed via the single Lyapunov function technique. Variable structure controllers of subsystems are designed so as the resulting closed-loop system guarantees the robust H∞ performance. An illustrative example and simulation results are given to demonstrate the effectiveness of the proposed design method. © 2011 Chamber of Turkish Electric.

关键词： Sliding mode control

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Trajectory Tracking Control of Pendulum with Variable Length by Partial Energy Shaping * *

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IFAC Proceedings Volumes 2011年第1期44卷 10679-10684页

作者： Xin Xin Tatsuya Shinji Taiga Yamasaki Changyin Sun Faculty of Computer Science and System Engineering Okayama Prefectural University 111 Kuboki Soja Okayama 719-1197 Japan School of Automation Southeast University Nanjing 210096 China

Abstract This paper concerns a trajectory tracking control problem for a pendulum with variable length, which is an underactuated mechanical system of two degrees-of-freedom with a single input of adjusting the length of the pendulum. We aim to study whether it is possible to design a time-invariant control law to pump appropriate energy into the variable-length pendulum for achieving a desired swing motion (trajectory) with given desired energy and length of the pendulum. First, we show that it is difficult to avoid singular points in the controller designed by using the conventional energy-based control approach in which the total mechanical energy of the system is controlled. Second, we propose a tracking controller free of singular points by shaping only the kinetic energy of rotation and the potential energy of the pendulum and not utilizing the kinetic energy related to the motion along the rod. Third, we analyze globally the motion of the pendulum and clarify the stability issue of some closed-loop equilibrium points; and we also provide some conditions on control parameters for achieving the tracking objective. Finally, we present numerical simulation results to validate the presented theoretical results.

关键词： Trajectory tracking control nonlinear control pendulum swing variable length stability analysis energy shaping Lyapunov stability

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New method of detection and wiping of sensitive information

New method of detection and wiping of sensitive information

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IEEE International Conference on Intelligent computer Communication and Processing (ICCP)

作者： George Pecherle Cornelia Győrödi Robert Győrödi Bogdan Andronic Iosif Ignat Faculty of Electrical Engineering and Information Technology University of Oradea Oradea Romania Faculty of Automation and Computer Science Technical University of Cluj-Napoca Cluj-Napoca Romania

One of the biggest problems in sensitive data wiping is to determine if a file is sensitive or not. Data wiping applications have improved a lot, but they cannot determine by themselves if a file is sensitive. The method we propose tries to determine if a file is sensitive by using a pre-defined set of rules initially specified by the user. These rules can update themselves in time, by “learning” from data patterns in previous sensitive files. The hard drive is monitored continuously to detect new sensitive data. Also, our method replaces the standard delete function from Windows with a secure wiping algorithm (overwriting data several times with pre-defined passes), but only for files that are determined to be sensitive.

关键词： Operating systems Monitoring computers File systems US Department of Defense Natural languages computer science

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Contribution to Stability Control of Nonlinear Systems

Contribution to Stability Control of Nonlinear Systems

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International Conference on Optimization of the Robots and Manipulators（OPTIROB 2011）

作者： Ivan Svarc Radomil Matousek Institute of Automation and Computer Science Faculty of Mechanical Engineering Brno University of Technology Technicka 2 Brno 616 69 Czech Republic

The most powerful methods of systems analysis have been developed for linear control systems. For a linear control system, all the relationships between the variables are linear differential equations, usually with constant coefficients. Actual control systems usually contain some nonlinear elements. In the following we show how the equations for nonlinear systems may be linearized. But the result is only applicable in a sufficiently small region in the neighbourhood of equilibrium point. The table in this paper includes the nonlinear equations and their the linear approximation. Then it is easy to find out if the nonlinear system is or is not stable;the task that usually ranks among the difficult tasks in engineering practice.

关键词： nonlinear system, equilibrium points, phase-plane trajectory

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An expanding application of heuristic reduction algorithm

An expanding application of heuristic reduction algorithm

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International Conference on Consumer Electronics, Communications and Networks

作者： Ning Xu Jun Gao Gang Shen Yun Zhang School of Computer Science and Information Engineering Shanghai Institute of Technology Shanghai China Faculty of Automation Guangdong University of Technology Guangzhou China

ISBN: (纸本)9781612844589

Heuristic reduction algorithm has got an extensive application in decision table; based on rough sets theory and partition of set, the attribute reduction of information systems without decision attributes is discussed. And a heuristic rule and an algorithm are given out. Some example shows the algorithm is effective and is an instructive attempt.

关键词： Heuristic algorithms Rough sets Partitioning algorithms Information systems Classification algorithms computers Algorithm design and analysis

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