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IEEE-EMBS International Conference on Biomedical and Health Informatics, BHI 2012. In Conj. with the 8th Int. Symp.on Medical Devices and Biosensors and the 7th Int. Symp. on Biomedical and Health engineering

作者： Sabahi, Hadi Soltanian-Zadeh, Hamid Scarpace, Lisa Mikkelsen, Tom Control and Intelligent Processing Center of Excellence School of Electrical and Computer Engineering University of Tehran Tehran 14395-515 Iran Image Analysis Laboratory Radiology Department Henry Ford Hospital Detroit MI 48202 United States Hermelin Brain Tumor Research Center Neurosurgery Department Henry Ford Health System Detroit MI 48202 United States

ISBN: (纸本)9781457721779

This paper proposes a method to predict the effect of Bevacizumab therapy on Glioblastoma Multiform (GBM) tumors. The prediction is critical for effective treatment planning. The proposed method is developed and evaluated using Diffusion Tensor Imaging (DTI) and post-contrast T1-weighted Magnetic Resonance Images (pc-T1-MRI) of 14 patients with GBM tumors gathered before and after the treatment. First, the proposed method calculates diffusion anisotropy indices (DAI) of all voxels in the brain. These diffusion anisotropy indices are Fractional Anisotropy (FA), Mean Diffusivity (MD), Relative Anisotropy (RA), and Volume Ratio (VR). Then, it registers post-treatment pc-T1-MRI and pre-treatment DAI maps to pre-treatment pc-T1-MRI. Next, it uses a thresholding method to segment the tumor from pc-T1-MRI studies. Comparing Gd-enhanced voxels of the pre- and post-treatment pc-T1-MRI, the DAIs of the tumor are labeled based on their response to the treatment. The voxels of 7 patients are randomly selected to train 4 classifiers (ANN, SVM, KNN, and ANFIS) and then all voxels of the other 7 patients are used to test them. For each classifier, four performance measures (sensitivity, specificity, positive predictive value, and accuracy) are calculated. Experimental results show that the ANFIS is more accurate than the other classifiers in predicting the treatment response. © 2012 IEEE.

关键词： Tumors

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Cell-phone based Drowsiness Monitoring and Management system

Cell-phone based Drowsiness Monitoring and Management system

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IEEE Biomedical Circuits and Systems (BIOCAS)

作者： Yu-Te Wang Chung-Kuan Cheng Kuan-Chih Huang Chin-Teng Lin Yijun Wang Tzyy-Ping Jung Department of Computer Science and Engineering University of California San Diego La Jolla USA Institute of Electrical Control Engineering National Chiao-Tung University Hsinchu Taiwan Institute of Engineering in Medicine Institute for Neural Computation University of California San Diego La Jolla USA

In recent years, driving fatigue and cognitive lapses have gained increasing attentions in the fields of public security, especially regarding the safe manipulation of vehicles. Studies have explored the relation between electroencephalogram (EEG) and driving behavior and several of them further proposed effective approaches (e.g., auditory feedback) to arouse subjects from drowsiness. However, these studies were performed under laboratory-oriented configurations using tethered, ponderous EEG equipment. In real environments, the setup of bulky cognitive monitoring equipment with a long-prep time is not feasible. Therefore, this study extends previous laboratory work by developing an on-line Drowsiness Monitoring and Management (DMM) System featuring a mobile wireless dry-sensor EEG headgear and a cell-phone based real-time EEG processing platform. The DMM system can continuously observe EEG dynamics, deliver arousing feedback to users experiencing momentary cognitive lapses, and assess the efficacy of the feedback in near real-time.

关键词： Electroencephalography Monitoring Mobile communication Wireless communication Wireless sensor networks Real-time systems Educational institutions

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Cloud-computing based velocity profile generation for minimum fuel consumption: A dynamic programming based solution

Cloud-computing based velocity profile generation for minimu...

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American control Conference (ACC)

作者： James Wollaeger Sri Adarsh Kumar Simona Onori Dimitar Filev Ümit Özgüner Giorgio Rizzoni Stefano Di Cairano The Ohio State University Center for Automotive Research The Ohio State University Powertrain Control R&A Ford Motor Company Electrical and Computer Engineering Department OSU Department and Center for Automotive Research Mechanical and Aerospace Engineering

This paper proposes a new framework to minimize the fuel consumed in a conventional vehicle over a given driving route by finding the optimal velocity profile. The optimization problem is solved in a remote cloud computing environment and assumes the vehicle route to be known a priori. A spatial domain dynamic programming optimization algorithm is used in this study to find the optimal velocity profile. The cloud-computing environment integrates information from GIS, road speed limits, into a vehicle simulator equipped with a fuel consumption model to predict fuel use along the desired route. The resulting global optimal velocity profile is sent back to the driver for velocity advisory.

关键词： Vehicles Fuels Optimization Dynamic programming Heuristic algorithms Vehicle dynamics Ice

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Sparse MEG Source Localization on Parameterized Cortical Medial Surface

Sparse MEG Source Localization on Parameterized Cortical Med...

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Iranian Conference of Biomedical engineering

作者： Hamid Khosravi Mahsa Mohammadkhani Hamid Soltanian-Zadeh Control and Intelligent Processing Center of Excellence School of Electrical and Computer Engineering Faculty of Engineering University of Tehran Tehran Iran Department of Computing Science University of Alberta Edmonton Alberta (AB) Canada

ISBN: (纸本)9781467331289

The inverse mapping in MagnetoEncephaloGraphy involves localizing neuronal activity of the gray matter tissue from measured signals around the head. The search space of the inverse mapping is conventionally represented in 3-D Cartesian coordinates including the cortical volume, or alternatively, 2-D manifold describing the cortical tissue. 3-D Cartesian coordinates does not suit sparse regularization of the inverse mapping in multi-resolution source domains. On the other hand, boundary surface of the cortex, represented as triangulated mesh, is used as the search space in some other inverse mapping techniques. However, this surface does not represent depth of the cortex. Moreover, to represent neuronal activity in embedded signal dictionaries, convoluted manifold should be gridded. In this paper we propose to use medial surface as the best surface descriptor of the cortical tissue. Furthermore, manifold gridding is constructed by defining bijective mapping between a flattened parameterized domain and convoluted surface. Signal bases are defined conventionally in the parameterized domain and mapped to the cortical volume by means of the bijective mapping. Medial surface of the cortex tissue, represented as triangulated mesh, is extracted by gradient-based search algorithm. Source localization, for simulated neuronal activity, is performed in real head model extracted from magnetic resonance images. Sparse estimated source of the inverse mapping are compared on volume, boundary surface, and medial surface domains. Simulation results confirm advantages of surface over volume domain. Performnace measures of source localization proves the medial surface as the best surface describing the cortex volume.

关键词： Magneto-encephalography (MEG) Inverse mapping Sparse regularization Multi-resolution Medial surface Mesh parameterization

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Takagi-Sugeno control of the Elevation Channel of A Twin-Rotor System Using Closed-Loop Empirical Data

Takagi-Sugeno Control of the Elevation Channel of A Twin-Rot...

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American control Conference

作者： Hamidreza Azimian Alireza Fatehi Babak N. Araabi Department of Mechanical and Materials Engineering The University of Western Ontario (UWO) London ON Canada Advanced Process Automation and Control (APAC) Research Group Industrial Control Center of Excellence Faculty of Electrical and Computer engineering K. N. Toosi University of Technology Tehran Iran School of Electrical and Computer Engineering University of Tehran Tehran Iran

ISBN: (纸本)9781457710957

In this paper, design of Takagi-Sugeno controllers for a twin-rotor system from empirical data is addressed. First, identification of linear models using Prediction Error Method in the presence of nonlinear distortions and in feedback systems is revisited, and it is demonstrated that feedback nonlinear systems with an integral action can be locally represented by linear models rather than affine models. Moreover, it is demonstrated that how the consistency and unbiasedness of the identified models can be improved by proper design of the experiments. In order to ensure that the unmodeled contributions in the resulting piecewise linear model are sufficiently small, a criterion is proposed based on the small-gain theorem that can be used for unfalsification of the piecewise linear model. Finally, by taking advantage of the separation principle, design of fuzzy Takag-Sugeno state feedback and observer is formulated in terms of Linear Matrix Inequalities (LMIs). The implementation results on the actual system demonstrate significant improvements with respect to the initial controller and previous work on similar systems.

关键词： Nonlinear systems Closed loop systems Observers Uncertainty Data models Predictive models

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Continuous-variable quantum key distribution using thermal states

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Physical Review A 2012年第2期86卷 022318-022318页

作者： Christian Weedbrook Stefano Pirandola Timothy C. Ralph Center for Quantum Information and Quantum Control Department of Electrical and Computer Engineering and Department of Physics University of Toronto Toronto M5S 3G4 Canada Department of Computer Science University of York Deramore Lane York YO10 5GH United Kingdom Centre for Quantum Computation and Communication School of Mathematics and Physics University of Queensland St Lucia Queensland 4072 Australia

We consider the security of continuous-variable quantum key distribution using thermal (or noisy) Gaussian resource states. Specifically, we analyze this against collective Gaussian attacks using direct and reverse reconciliation where both protocols use either homodyne or heterodyne detection. We show that in the case of direct reconciliation with heterodyne detection, an improved robustness to channel noise is achieved when large amounts of preparation noise is added, as compared to the case when no preparation noise is added. We also consider the theoretical limit of infinite preparation noise and show a secure key can still be achieved in this limit provided the channel noise is less than the preparation noise. Finally, we consider the security of quantum key distribution at various electromagnetic wavelengths and derive an upper bound related to an entanglement-breaking eavesdropping attack and discuss the feasibility of microwave quantum key distribution.

关键词： CONTINUOUS functions VARIABLES (Mathematics) QUANTUM theory ENERGY levels (Quantum mechanics) GAUSSIAN distribution ROBUST control

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A three-phase to three-phase matrix converter prototype

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controle y Automacao 2012年第3期23卷 247-262页

作者： De Oliveira Filho, Milton E. Sguarezi Filho, Alfeu J. Ruppert, Ernesto Mobility Engineering Center Federal University of Santa Catarina - UFSC Joinville-SC Brazil Center of Engineering Modeling and Applied Social Sciences - CECS Federal University of ABC - UFABC Santo André-SP Brazil Department of Systems and Energy Control Electrical and Computer Engineering University of Campinas Campinas-SP Brazil

This paper presents some implementation details of a three-phase to three-phase matrix converter prototype. The bidirectional semiconductor switches were built using discrete IGBTs and fast diodes. Design aspects such as protection against overvoltage and short-circuit, commutation process of bi-directional switches, and input filter are addressed in this paper.

关键词： Matrix converters

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Enhancing the efficiency of photovoltaic solar cells with photonic nanostructures

Enhancing the efficiency of photovoltaic solar cells with ph...

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IEEE Photonics Conference (IPC)

作者： Georgios Veronis Changjun Min Christopher H. Granier Jonathan P. Dowling Department of Electrical and Computer Engineering Center for Computation and Technology Louisiana State University Baton Rouge LA USA Center for Computation and Technology Louisiana State University Baton Rouge LA USA Hearne Institute for Theoretical Physics Department of Physics and Astronomy Louisiana State University Baton Rouge LA USA

We demonstrate that periodic metallic gratings can greatly enhance the optical absorption efficiency of thin-film solar cells. We also introduce aperiodic multilayer structures with highly directional absorptivity for... 详细信息

关键词： Photovoltaic cells Absorption Gratings Optical polarization Photovoltaic systems Photonics

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Experimentally verified Iterative Learning control based on repetitive process stability theory

Experimentally verified Iterative Learning Control based on ...

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American control Conference (ACC)

作者： Pawel Dabkowski Krzysztof Galkowski Eric Rogers Zhonglun Cai Chris T. Freeman Paul L. Lewin Zdenek Hurak Anton Kummert Department of Control Engineering Faculty of Electrical Engineering Czech Technical University Praque Czech Republic Institute of Physiscs Faculty of Physics Astronomy and Informatics Nicolaus Copernicus University Torun Poland University of Wuppertal Germany Institute of Control and Computation Engineering University of Zielona Gora Zielona Gora Poland Electronics and Computer Science University of Southampton Southampton UK Faculty of Electrical Engineering Czech Technical University Czech Republic Faculty of Electrical Information and Media Engineering Communication Theory University of Wuppertal Germany

This paper gives new results on the design and experimental evaluation of an Iterative Learning control (ILC) law in a repetitive process setting. The experimental results given are from a gantry robot facility that has been extensively used in the benchmarking of linear model based ILC designs. An example is also given to demonstrate that this new design offers much superior performance in comparison to some previous designs based on the Roesser model for 2D linear systems.

关键词： Robots State-space methods Asymptotic stability Educational institutions Vectors Stability criteria

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Ship tracking control based on linear active disturbance rejection control

Ship tracking control based on linear active disturbance rej...

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International Conference on Intelligent control and Information Processing (ICICIP)

作者： Ronghui Li Tieshan Li Qinling Zheng Qiang Li Navigaion College of Dalian Maritime University Dalian China Center for Advanced Control Technologies Department of Electrical Computer Engineering Cleveland State University Cleveland OH USA

Owing to ship's high inertia, strong time lag, non-linearity and under-actuated characteristics, as well as sustaining external disturbances frequently, designing a high performance ship tracking controller is still one of the most important research topics of ship motion control. Active Disturbance Rejection control (ADRC) is proved to be very effective control method because it is independent of mathematical model of the plant and can compensate the internal and external disturbances dynamically. This paper investigates the applications of ADRC in ship motion tracking control and presents the design method of ADRC controller appropriate for ship tracking control. Firstly, ship motion mathematical model is introduced briefly and the linear ADRC (LADRC) is analyzed. Then considering the nonlinear ship track design model as a third order plant after utilizing variable substitution, a LADRC controller is designed by using fourth order linear extended state observer (LESO). At last, the simulation is performed. Simulation results show that the controller has a good tracking performance and disturbance rejection ability and is robust to the ship motion nonlinear characteristic and the external disturbances. The tracking process is fast, smooth and minor energy consumption.

关键词： Marine vehicles Mathematical model Observers Tracking Equations Educational institutions Robustness

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