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Sensor Motion Planning in Distributed Parameter Systems Using Turing's Measure of Conditioning

Sensor Motion Planning in Distributed Parameter Systems Usin...

引用

IEEE Conference on Decision and control

作者： Dariusz Ucinski YangQuan Chen Institute of Control and Computation Engineering University of Zielona Góra Zielona Poland Department of Electrical and Computer Engineering Utah State University Logan UT USA

ISBN: (纸本)1424401704

We present a technique for planning sensor motions in a specified two-dimensional spatial domain in such a way as to make the Hessian of the parameter estimation cost well conditioned. The framework is based on the use of Turing's measure of conditioning, whose minimization yields the confidence regions for the parameters as spherical as possible. Since this does not necessarily guarantee a high information content in the measurements, an additional constraint is imposed on the D-efficiency of the solutions. Then the approach converts the problem to an optimal control one in which both the control forces of the sensors and the initial sensor positions are optimized. Numerical solutions are then obtained using the MATLAB PDE toolbox and the RIOTS_95 optimal control toolbox which handles various constraints imposed on the sensor motions

关键词： Sensor systems Distributed parameter systems Motion measurement Pollution measurement Parameter estimation Optimal control Mathematical model Ellipsoids Partial differential equations Area measurement

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IEEE IRI 2006 Keynote Speech(I);System of Systems - From Definition to Architecture to Simulation to Space Applications

IEEE IRI 2006 Keynote Speech(I);System of Systems - From Def...

引用

IEEE International Conference on Information Reuse and Integration (IRI)

作者： Mo Jamshidi Department of Electrical and Computer Engineering and Autonomous Control Engineering-ACE Center University of Technology San Antonio TX USA

One of the main challenges of any related paradigms in systems engineering is being able to handle complex systems under unforeseen uncertainties. A system may be called complex if its dimension (order) is too high and its model (if available) is nonlinear, interconnected, and information on the system is so uncertain that classical techniques cannot easily handle the problem. A system of systems (SoS) is a "super system," or an integration of complex systems coordinated together in such a way as to achieve a wider set of goals with possible higher significance such as global warming, Mars missions, air traffic control, global earth observation system, etc. computational Intelligence or Soft Computing, a consortium of fuzzy logic (approximate reasoning), neuro-computing (learning), genetic algorithms and genetic programming (optimization), has proven to be a powerful set of tools for adding autonomy and semi-autonomy to many complex systems. For such systems the size of soft computing control architecture will be nearly infinite. In this presentation, paradigms using soft computing approaches are utilized to design autonomous controller with controller reuse for a number of space applications. The notion of adaptation in autonomous controller reuse can be handled via intelligent tools to add on additional capabilities in real-time scenarios. Learning from past experience is but one such scenario for the reuse of autonomous controllers. These applications include satellite array formations, robotic agents and the Virtual Laboratory (V-LAB®) for multi-physics modeling and simulation.

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Finding the Number of Clusters in a Dataset Using an Information Theoretic Hierarchical Algorithm

Finding the Number of Clusters in a Dataset Using an Informa...

引用

IEEE International Conference on Electronics, Circuits and Systems (ICECS)

作者： M. Aghagolzadeh H. Soltanian-Zadeh B. N. Araabi A. Aghagolzadeh Department of Electrical and Computer Engineering Control and Intelligent Processing Center of Excellence University of Tehran Tehran Iran Faculty of Electrical and Computer Engineering University of Tabriz Tabriz Iran

One of the most challenging problems of clustering is detecting the exact number of clusters in a dataset. Most of the previous methods, presented to solve this problem, estimate the number of clusters with model based algorithms, which are not able to detect all types of clusters and also face a problem in detecting coupled clusters in a dataset. In this paper we propose a new method for finding the number of clusters in a dataset utilizing information theory and a top-down hierarchical clustering algorithm. The algorithm starts from a large number of clusters and reduces one cluster in any iteration and then allocates its data points to the remaining clusters. Finally, by measuring information potential, the exact number of clusters in a desired dataset is detected. Our method shows high capability and stability in detecting the number of clusters even in complex datasets, as it is computational efficient too. We show the effectiveness of the proposed method by experimenting on several artificial and real datasets and comparing its results with two developed methods for finding the number of clusters in a dataset. The comparisons show superiority of the proposed method.

关键词： Clustering algorithms Entropy Face detection Process control Intelligent control Information theory Stability computational efficiency Electric variables measurement computational complexity

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High SNR flexible top hat monopole probe for 1.5 T MRI

High SNR flexible top hat monopole probe for 1.5 T MRI

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作者： Mohammadzadeh, M. Shahabadi, M. Soltanian-Zadeh, H. Tavakoli, A. Rafiei, B. Javidnia, D. Oghabian, M.A. Department of Physics Amir-Kabir University of Technology Tehran Iran School of Electrical and Computer Engineering University of Tehran Tehran Iran Control and Intelligent Processing Center of Excellence School of Electrical and Computer Engineering University of Tehran Tehran Iran Image Analysis Laboratory Department of Radiology Henry Ford Health System Detroit MI United States Department of Electrical Engineering Amir-Kabir University of Technology Tehran Iran Medical Imaging Center Imam Khomeyni Hospital Tehran Iran Research Center for Science and Technology in Medicine Tehran University of Medical Sciences Tehran Iran

In this paper, design principles and application of a thin and flexible intravascular top hat monopole probe with increased signal-to-noise ratio (SNR) and improved longitudinal and radial coverage are described and compared with the conventional monopole probe. The top hat probe is constructed by removing a segment of the shield of a coaxial cable. A flexible thin copper foil in contact with the inner conductor of the cable is added to the end section of the cable. The copper foil acts as an antenna top hat load increasing the uniformity of the current distribution on the probe and establishes a uniform region of SNR distribution around the probe. Improvement of the SNR distribution of the top hat probe relative to the conventional monopole probe is evaluated using quantitative indices. Experimental results show that for the top hat probe, the ratio of the maximum image SNR to its relative standard deviation (SR) is 2.73 times higher than that of a conventional probe. © 2006 IOP Publishing Ltd.

关键词： Medical imaging

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Application of Minimum Entropy Estimation in Modal Analysis

Application of Minimum Entropy Estimation in Modal Analysis

引用

IEEE Digital Signal Processing Workshop

作者： Minh Ta Dayong Zhou Victor DeBrunner Dynamics Structures Sensing and Control Center and the School of Electrical and Computer Engineering University of Oklahama USA

ISBN: (纸本)1424405343

We propose a modification of the popular eigensystem realization algorithm (ERA) using the minimum entropy estimation (MEE) method. The eigensystem realization algorithm is an LS method that is used to estimate the system matrices in a state-space representation of a physical structure. The MEE is known for its superior variance estimation as compared to the LS method when the measurement noise is unknown and non-Gaussian. It can be used to give a better estimate of the Markov sequence of a dynamical system, which in turn leads to the estimation of the system matrices and the poles using ERA

关键词： Entropy Modal analysis Noise measurement Hydrogen Gaussian noise Working environment noise Application software State estimation MIMO Measurement uncertainty

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Design, simulation, and optimization of an on-chip bow-tie slot antenna using genetic algorithm

Design, simulation, and optimization of an on-chip bow-tie s...

引用

Antennas and Propagation Society International Symposium

作者： H. Sedaghat-Pisheh H. Aliakbarian Z. Safarian M. Shahabadi C. Lucas Photonics Research Lab School of Electrical and Computer Engineering University of Tehran Iran Control & Intelligent Processing Center of Excellence School of Electrical and Computer Engineering University of Tehran Iran

ISBN: (纸本)1424401224

Design, simulation, and optimization of a novel (extremely) broad-band coplanar waveguide (CPW)-fed on-chip antenna using genetic algorithm (GA) is presented. The antenna is of slot type and has the shape of a bow-tie with rounded truncation. It is designed on quartz coated silicon substrate and fed with 50 ohms CPW transmission line. Return loss of the antenna is less than -10 dB for most of the frequency range of 5-60 GHz

关键词： Algorithm design and analysis Design optimization Slot antennas Genetic algorithms Dipole antennas Frequency Horn antennas Substrates computational modeling Coplanar waveguides

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A New Architecture to Execute CAs-Based Path-Planning Algorithm in Mobile Robots

A New Architecture to Execute CAs-Based Path-Planning Algori...

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International Conference on Mechatronics (ICM)

作者： Adel Akbarimajd Caro Lucas Robotics and AI Laboratory Department of Electrical and Computer Engineering University of Tehran Iran Center of Excellence for Control and Intelligent Processing Department of Electrical and Computer Engineering University of Tehran Iran

Several path-planning algorithms for mobile robots have been introduced. Proper architectures for mobile robots to implement the path-planning algorithms are also of interest. If the mobile robots are to perform complicated tasks including complex sensing and planning operations and have accepted performance, must be autonomous: capable of acquiring information and performing tasks without programmatic intervention. In this paper we employ a layered architecture for mobile robots to perform our previously introduced cellular automata based path planning technique. It employs an abstraction approach which makes the complexity manageable. The architecture has an important feature which is its internal artifacts; it has some beliefs about the world and these beliefs are represented in artifacts and most actions are planned and performed with respect to these artifacts

关键词： Path planning Mobile robots Robot kinematics Content addressable storage Lattices computer architecture Orbital robotics Automata Intelligent sensors Robotics and automation

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electrical stimuli capsule for control moving direction at the small intestine

Electrical stimuli capsule for control moving direction at t...

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4th IASTED International Conference on Biomedical engineering

作者： Woo, S.H. Jang, J.Y. Jung, E.S. Lee, J.H. Moon, Y.K. Kim, T.W. Won, C.H. Choi, H.C. Cho, J.H. School of Electronic Engineering and Computer Science Kyungpook National University College of Veterinary Medicine Dept. of Physiology Kynugpook National University Department of Computer Control and Electrical Engineering Kyungil University Advanced Research Center for Recovery of Human Sensibility Kyungpook National University Engineering Building 10 Kyungpook National University 1370 Sankyuk-dong Buk-gu Daegu 702-701 Korea Republic of

ISBN: (纸本)0889865787

Recently, a capsule endoscope has been developed to observe images from the inside of intestine. Such a capsule endoscope does not have locomotion or hold method. To get proper diagnosis and medication, it is necessary to control the capsule from outside to guide locomotion. The designed and implemented capsule has feasibility to contract the small intestine by electrical stimuli through the electrodes. When the small intestine is contracted by electrical stimuli, the capsule can move to opposite direction, which means the capsule can go up and down in the small intestine. The implemented stimuli capsule always monitors excessive energy transmission and automatically shuts down the electrical stimuli to make it more secure. Additionally, the stimuli capsule goes on standby mode to save the battery, and it can be reset by comparator circuit which is connected to stimulus electrodes. To verify the design and implement the stimuli capsule, in-vitro experiments were performed with pig's small intestine.

关键词： Biomedical engineering

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Design and implementation of the telemetry capsule for measuring of electrogastrography

Design and implementation of the telemetry capsule for measu...

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4th IASTED International Conference on Biomedical engineering

作者： Jung, E.S. Lee, J.H. Woo, S.H. Yoon, K.W. Jang, J.H. Kim, M.K. Moon, Y.K. Kim, T.W. Won, C.H. Choi, H.C. Cho, J.H. School of Electronic Engineering and Computer Science Kyungpook National University College of Veterinary Medicine Dept. of Physiology Kynugpook National University Department of Computer Control and Electrical Engineering Kyungil University Advanced Research Center for Recovery of Human Sensibility Kyungpook National University Engineering Building 10 Kyungpook National University 1370 Sankyuk-dong Buk-gu Daegu 702-701 Korea Republic of

ISBN: (纸本)0889865787

Electrogastrography (EGG) is a significant reference of the myoelectric activity of the gastrointestinal tract and indicates whether it has a disease or not. There have been numerous studies of the myoelectric activity in a stomach, but only a few studies of the intestines because of the difficulty of measurement in the intestines. Recently, the technology of the biotelemetry capsule for measurement of internal information in the human digestive tract has been developed. In the current study, an EGG telemetry system using the developed biotelemetry technology was designed and implemented for measuring EGG in intestines. The EGG capsule converts the acquired EGG value to digital data, which is transmitted from the capsule to the external receiver. The performance of the telemetry capsule for the EGG monitoring in the gastrointestinal tract was verified by in-vitro animal experiments. From the experiment, it was verified that the EGG telemetry capsule can measures a slow wave in intestines.

关键词： Biomedical engineering

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Semi-global enlargement of domain of attraction for a class of affine nonlinear systems

Semi-global enlargement of domain of attraction for a class ...

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IEEE International Conference on computer-Aided Design

作者： Farzad Hashemzadeh Mohammad J. Yazdanpanah Control & Intelligent Processing Center of Excellence School of Electrical and Computer Engineering University of Tehran Tehran Iran

In this paper, a new approach to enlarge the domain of attraction of a nonlinear affine system based on Zubov theorem is suggested. The affine systems which are studied in this paper some times have some constraints that coping with them are difficult. The proposed approach may alleviate these difficulties by introducing an extended controller design methodology. The controller can extend the domain of attraction as an n-dimensional ellipsoid in a way that the diameters of ellipsoid, may be used as the tuning factors for shaping and enlarging it as much as possible. In this approach, the ratios of diameters are not crucial. In other words, it is possible to stretch the domain of attraction along some directions and compress it along the others. The simulation results on the Van der Pole system and two case studies, namely, a vehicle dynamics and an inverted pendulum show the efficiency of the method

关键词： Nonlinear systems control systems Nonlinear control systems Design methodology Vehicle dynamics Ellipsoids State-space methods Design optimization Time factors Shape control

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