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International IEEE/EMBS Conference on Neural engineering, CNE

作者： E. Giraldo G. Castellanos-Dominguez Faculty of Electrical and Electronic Engineering Physics and Computer Science Universidad Tecnológica de Pereira Colombia Electronical and Computing Engineering Department Universidad Nacional de Colombia Colombia

A new electroencephalographic current density reconstruction method is introduced using a physiologically based nonlinear modeling that describes better the dynamic behavior of the neural activity. In addition, time-variant parameters are considered into the model to capture the dynamics for normal and pathological states measured from signals. The method is implemented by Unscented Kalman filtering approach. The performance of the new method is evaluated (in terms of mean square error) by application to simulated EEG data over several noise conditions, and a considerable improvement over linear estimation approaches is found.

关键词： Brain modeling Electroencephalography Estimation Mathematical model Inverse problems Computational modeling Kalman filters

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Comparative analysis of time frequency representations for discrimination of epileptic activity in EEG signals

Comparative analysis of time frequency representations for d...

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International IEEE/EMBS Conference on Neural engineering, CNE

作者： J. D. Martínez-Vargas L. D. Avendaño-Valencia E. Giraldo G. Castellanos-Dominguez Universidad Nacional de Colombia Colombia Faculty of Electrical and Electronic Engineering Physics and Computer Science Universidad Tecnológica de Pereira Colombia Electrical Electronical and Computing Engineering Department Universidad Nacional de Colombia Colombia

Epilepsy is a brain pathology that affects approximately 40 million people in the world. The most utilized clinical test for epilepsy diagnose is the electroencephalogram (EEG). For this reason, nowadays are being developed multiple tools devised for automatic seizure detection on EEG signals. In this work, several approaches of TFR estimation for detection of epileptic events in EEG recordings are compared. Parametric (stochastic evolving and local estimation) TFR estimators as well as non-parametric (STFT, SPWV and CWT) are under study. Comparison is made according with the achieved performance using a recently proposed methodology for TFR based classification. Results show similar outcomings with all approaches for TFR estimation, achieving accuracy rates from 96 to 99%. Best performance was found for STFT and STTVAR approaches for TFR estimation.

关键词： Time frequency analysis Electroencephalography Estimation Accuracy Continuous wavelet transforms Brain modeling Databases

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A study on seamless handover algorithm in the u-TSN environment 17

A study on seamless handover algorithm in the u-TSN environm...

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17th World Congress on Intelligent Transport Systems, ITS 2010

作者： Park, Sin-Woo Lim, Chang-Bum Park, Do-Woo Kim, A-Sol Park, Joon-Goo School of Electronical Engineering and Computer Science Kyungpook National Universtity Korea Republic of

The u-TSN(Ubiquitous Transportation Service Network) is a system which aims on providing various traffic services through telecommunication among the u-TSN members like vehicles, center, roadside infrastructures. To provide best communication quality, in the u-TSN, it is important for vehicles to handover. This is needed. Because vehicles move on a road and roadside infrastructures have limited transmission range. In the u-TSN, communication between vehicle and roadside infrastructure is working on IEEE 802.11p standard. In this paper, we propose handover algorithm base on IEEE 802.11p standard. Furthermore, message transmission method without message loss due to vehicle moving into another roadside infrastructure transmission range will be proposed.

关键词： Roadsides

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Magnetic properties of neutron irradiated RPV steel

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Hyperfine Interactions 2009年第1-3期188卷 63-69页

作者： Nam, Hyo Duk Kim, Eng Chan School of Electronical Engineering and Computer Science Yeungnam University Yeungnam 712-749 Korea Republic of Department of Physics Yeungnam University Gyongsan 712-749 Korea Republic of

The neutron irradiated reactor pressure vessel (RPV) steels at various dose of 0-1018 n/cm2 have been studied with Mössbauer, x-ray diffraction, and VSM. The Mössbauer data shows that the value of magnetic hyperfine field of Fe atom that exist at martensite is 330 kOe at site 1 and 305 kOe at site 2. At room temperature, the total absorption area of Mössbauer spectra with respect to irradiation of neutron is constant for the dose of 0-1016 n/cm2, while over the dose of 0-10 17 n/cm2 the absorption area decreases rapidly. But the doublet area for the dose of 0-1016 n/cm2 is constant, while over the dose of 1017 n/cm2 it increases with increasing the fluence level of neutron. The coercivity and remanence of the neutron irradiated samples do not change significantly. But the maximum induction decreases by 5% at 1018 n/cm2, compared with that of the as-received sample. © 2008 Springer science+Business Media B.V.

关键词： Neutrons

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The research of image registration algorithm based on digital subtraction: B-spline interpolation's elastic registration

The research of image registration algorithm based on digita...

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2009 International Conference on Computational Intelligence and Software engineering, CiSE 2009

作者： Mu, Yining Wang, He Li, Ping School of Electronical Information Engineering Changchun University of Science and Technology Changchun Jilin 130022 China College of Computer Changchun University of Science and Technology Changchun Jilin 130022 China

ISBN: (纸本)9781424445073

Digital subtraction angiography (DSA) registration affects the quality of diagnosis. In this paper, Medical Image Registration and its basic processes, proposed rough at registration on a basic level of B-spline function, using its smoothness and accuracy, can effectively eliminate the corresponding point of the impact of position error, thereby achieve accurate registration. ©2009 IEEE.

关键词： Diagnosis

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Reusing heterogeneous software process models

Reusing heterogeneous software process models

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IEEE Symposium on computers and Communications (ISCC)

作者： Aoussat Fadila Ahmed Nacer Mohamed Department of Computer Science Saad Dahlab Blida University Burgas Algeria Faculty of Electronical Engineering and Computer Science University of Sciencesand Technology Houari Boumediene Algeria

The reuse of software components is an approach that exploits experience and capitalized knowledge during software development. Software reuse aims to optimize the cost and time of developing high quality software. The efficient and relevant reuse is the one that allows reusing components of high heterogeneity. We exploit this concept of reusing software components to software process modeling; therefore, we use the concept of software process model component (SPMC). This paper presents an overview of environments for reusing software process model components, and advances the bases of a new approach for the modeling software process based on components. Unlike the existing environments, our approach focuses in the one hand, on the strong heterogeneity of software process model components, and in the other hand, on the diversity of their origin. The advantage of our approach is that it applies a reverse engineering technique for the components that are not necessarily created in the system, but that may come from external software process models; also, from process models not oriented components.

关键词： Object oriented modeling Assembly computer architecture Programming Software quality Reverse engineering Software packages Packaging Scanning probe microscopy Knowledge engineering

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Noise resilient image fusion based on orthogonal matching pursuit

Noise resilient image fusion based on orthogonal matching pu...

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IEEE International Conference on Systems, Man and Cybernetics

作者： Bin Liao Li-xiong Liu School of Electric and Electronical Engineering North China Electric Power University Beijing China School of Computer Science&Technology Beijing Institute of Technology Beijing China

A novel image fusion algorithm based on orthogonal matching pursuit (OMP) is proposed, which is named IFOMP algorithm and can be used for noise free or noise images. The matching pursuit algorithm provides an efficient image representation using an overcomplete dictionary. Firstly, the source images are decomposed into sub-images at different scales through Laplacian pyramid transform. The OMP method is exploited for capturing and fusing edges and texture features in the high frequency domain. Experimental results show that the proposed algorithm improves performance compared to traditional wavelet fusion with slightly increased computational complexity, and the fusion image has good robustness.

关键词： Image fusion Matching pursuit algorithms Pursuit algorithms Dictionaries Laplace equations Noise robustness Problem-solving Cybernetics USA Councils Power engineering and energy

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Enhanced MAC Protocol and Scheduling Algorithm for High Rate WPANs

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电子学报(英文版) 2008年第4期17卷 691-697页

作者： KIM Byung Seo KIM Sung Won XI Yong AHN Hong Young Department of Computer and Information Communication Engineering HongIk University Korea School of Electrical Engineering and Computer Science Yeungnam University Korea School of Electronical Science and Engineering National University of Defense Technology Changsha 410073 China

The demands for higher data rate in Wireless personal area network (WPAN) than one in Bluetooth has been completed with IEEE 802.15.3 standard. The standard, named High-rate WPAN (HR-WPAN), adopts TDMA-based Medium access control (MAC) protocol. In this paper, we propose novel MAC protocol and scheduling algorithm to achieve efficient time-slots allocation. Time slots for data transmissions are allocated by two steps. In the first step, the time slots are initially allocated using a proposed allocation algorithm based on statistical packet inter-arrival time. Then, the initial allocation is dynamically adjusted by utilizing feedback information coming from each device. Performance evaluations are carried out through extensive simulations and significant performance enhancements are observed.

关键词： WPAN 无线网络链接适应存取控制

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Localization of distributed fiber sensor employing a sub-ring

Localization of distributed fiber sensor employing a sub-rin...

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Asia-Pacific Optical Fiber Sensors Conference, APOS

作者： Wei-min Chen Yuan-yuan Xie Peng Zhang Lei Lin School of optical electronical Engineering Chongqing University Chongqing China School of Computer Science and Information Engineering Chongqing Technology and Business University Chongqing China

There is a simple distributed optical fiber sensing system which is used to monitor vibration signal, having an additional sub-loop coupled with main ring by a 3dB coupler. This paper compares three outputting interfered beams, each of them traveling in the sub-ring 0, 1, 2 times separately. Using the simultaneous equations produced by those three outputs, it finds the relation between the interference lights and vibration signal's characteristics, such as frequency, amplitude and position. Through simplify and calculating, vibration position of long pipeline is to be achieved finally.

关键词： Optical fiber sensors Optical coupling Optical fiber couplers Optical fibers Monitoring Equations Interference Frequency Pipelines

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Localization of Distributed Fiber Sensor Employing a Sub-Ring

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Journal of Electronic science and Technology of China 2008年第4期6卷 377-380页

作者： Wei-Min Chen Yuan-Yuan Xie Peng Zhang Lei Lin School of Optical Electronical Engineering Chongqing University Chongqing 400044China School of Computer Science and InformationEngineering Chongqing Technology and Business University Chongqing400067 China

A simple distributed optical fiber sensing system used to monitor vibration signal has an additional sub-loop eoupled with main ring by a 3 dB coupler. This paper compares three outputting interfered beams, each of them travels in the sub-ring 0, 1, 2 times, separately. Using the simultaneous equations produced by those three outputs, we find the relation between the interference lights and vibration signal＇s characteristics, such as frequency, amplitude and position. Through simplifying and calculating, the vibration position can be obtained finally.

关键词： Distributed fiber interference,localization sensor vibration.

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