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Performance evaluation for DNO governance using data envelopment analysis method

Performance evaluation for DNO governance using data envelop...

引用

Iranian Conference on Smart Grids (ICSG)

作者： Amin Ghafouri Alireza Fereidunian Hamid Lesani Habib Torabi Payam Kharazmi Systems and Machines Research Laboratory (SMRL) Control and Intelligent Processing Center of Excellence CIPCE) School of ECE University of Tehran Tehran Iran Smart Grid Research Laboratory Faculty of ECE K.N. Toosi University of Technology Tehran Iran The Greater Tehran Electricity Distribution Company (GTEDC) Tehran Iran

Smart performance evaluation of Distribution Network Operators (DNOs) is an essential part of their effective governance task. This paper focuses on benchmarking twenty one districts of the Greater Tehran Electricity Distribution Company (GTEDC) using Data Envelopment Analysis (DEA). Three methods are employed, namely: CCR (Charnes, Cooper, and Rhodes), SBM (Slack Based Measurement), and WSBM (Weighted Slack Based Measurement). The results consist of efficiency scores of CCR, SBM, and WSBM with slacks analysis for the latter. Based on the WSBM results, weak districts are clarified and necessary improvements are suggested.

关键词： Electricity Companies Data envelopment analysis Vectors Benchmark testing Performance evaluation Weight measurement

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Development of a MATLAB-Based Toolbox for Brain Computer Interface Applications in Virtual Reality

Development of a MATLAB-Based Toolbox for Brain Computer Int...

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Iranian Conference on Electrical Engineering

作者： Fardin Afdideh Mohammad Bagher Shamsollahi Seyed Navid Resalat Biomedical Signal and Image Processing Laboratory (BiSPL) School of Electrical Engineering Sharif University of Technology Control and Intelligent Processing Center of Excellence School of Electrical and Computer Engineering College of Engineering University of Tehran

ISBN: (纸本)9781467311496

Brain computer interface (BCI) is a widely used system to assist the disabled and paralyzed people by creating a new communication channel. Among the various methods used in BCI area, motor imagery (MI) is the most popular and the most common one due to its the most natural way of communication for the subject. Some software applications are used to implement BCI systems, and some toolboxes exist for EEG signal processing. In recent years virtual reality (VR) technology has entered into the BCI research area to simulate the real world situations and enhance the subject performance. In this work, a completely MATLAB-based Mi-based BCI system is proposed and implemented in order to navigate into a virtual environment. In addition, a variety of features types were employed to select the best ones in the proposed system with the use of linear discriminant analysis (LDA) classifier through some interactive graphical user interfaces (GUIs). The results show the feasibility of the proposed BCI system in the subject training with or without feedback and even navigation into a virtual home.

关键词： Brain Computer Interface (BCI) MATLAB Motor Imagery (MI) Virtual Reality (VR) Real-time EEG signal processing

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Automatic organs' detection in WCE

Automatic organs' detection in WCE

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International Symposium on Artificial Intelligence and Signal processing (AISP)

作者： Omid Haji-Maghsoudi Alireza Talebpour Hamid Soltanian-Zadeh Navid Haji-maghsoodi Department of Radiation Medicine Shahid Beheshti University of Tehran Tehran Iran Radiology Image Analysis Laboratory Henry Ford Hospital Detroit MI USA Control and Intelligent Processing Center of Excellence (CIPCE) School of Electrical and Computer Engineering University of Tehran Tehran Iran Department of Mechatronics Sharif University of Tehran Tehran Iran

Wireless capsule endoscopy (WCE) views the entire gastrointestinal (GI) tract. A main problem associated with this novel device is that too many frames must be reviewed by physicians. Thus it is essential to find an automatic and intelligent method to help physicians. One of the problems in WCE is its difficulty to distinguish among different organ's tissues. So, we introduce two novel algorithms which are able to classify main organs (among esophagus, stomach, small bowel and colon) in WCE's frames. In order to obtain our aim, we use statistic features (Haralick features) and non-statistic features (different diagrams and Gabor filter banks), colored features and non-colored features. Our experimental studies indicate good results that are shown in conclusion.

关键词： Level set Medical services Gabor filters Active contours Wireless communication Optical wavelength conversion Esophagus

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A New Approach for Overcoming Failure of Current Sensors in States Estimation of an Induction Motor

A New Approach for Overcoming Failure of Current Sensors in ...

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IEEE Interantional Conference on Industrial Technology

作者： Hamed Tebianian Behzad Moshiri Mohammad Taghi Nabavi Department of Electrical Engineering Shahrood Branch Islamic Azad University Shahrood Iran Control and Intelligent Processing Center of Excellence School of ECE University of Tehran Tehran Iran

ISBN: (纸本)9781467303408;9781467303422

Failures and uncertainties of current sensors are key issues in states and parameters estimation of Induction motors. In this paper, an EKF equipped with Output Augmented Fusion method (OAF) is used to design a new observer for dominance over these challenges. The proposed observer has the ability of speed estimation in a wide range with less sensitivity to parameters' variations and also failures and uncertainties of current sensors. An EKF is employed to estimate speed as a dynamic state variable over wide range of variation, using extension of states vector with equation of motion and other major parameters consisted of stator/rotor resistances and load torque. Moreover, using OAF algorithm, output matrices are extended to overcome failure probability and uncertainties of current sensors. The effectiveness of this approach is validated by simulation.

关键词： Current sensors induction motors State estimation OAF gene Speed Estimation State variable Uncertainty Parameter estimation loading moments failures failure probability

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Numerical Solutions to the Bloch-McConnell Equations with Radio Frequency Irradiation Scheme for CEST MRI

Numerical Solutions to the Bloch-McConnell Equations with Ra...

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Iranian Conference on Electrical Engineering

作者： Mohammadreza Rezaeian Gholam-Ali Hossein-Zadeh Hamid Soltanian-Zaseh Control and Intelligent Processing Center of Excellence CIPCE School of ECE College of Eng. Image Analysis Laboratory Radiology Department Henry Ford Hospital Sheikhbahaee University Faculty of Engineering

ISBN: (纸本)9781467311496

Chemical exchange saturation transfer (CEST) is a new mechanism of contrast generation in magnetic resonance imaging (MRI) which differentiates molecule biomarkers via chemical shift. CEST MRI contrast mechanism is complex and depends on radio frequency (RF) pulses used in experimental conditions. To find the optimal RF pulse, numerical solutions of Bloch-McConnell equations may be used. The purpose of this work is to compare the effects of different RF pulses on the CEST phenomenon. First, a two-pool exchange model for CEST in MRI is used. Z-spectra and signal calculations for the two-pool model have been carried out for some RF pulses. Efficiency of both continuous and binomial RF pulses is investigated by calculating three parameters, namely: CEST image contrast, flip angle and specific absorption ratio (SAR). The contrast of CEST image is considered proportional to amount of saturation. As a binomial RF pulse, WALTZ-16* demonstrates a good efficiency, but generates some unwanted direct saturations. On the other hand, continuous RF pulses do not create any unwanted direct saturation, but have less efficiency.

关键词： Bloch equations Bloch-McConnell equations CEST MRI Numerical solution SAR

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Appropriate twinkling frequency and inter-sources distance selection in SSVEP-based HCI systems

Appropriate twinkling frequency and inter-sources distance s...

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2011 2nd IEEE International Conference on Signal and Image processing Applications, ICSIPA 2011

作者： Resalat, Seyed Navid Setarehdan, Seyed Kamaledin Afdideh, Fardin Heidarnejad, Ali Control and Intelligent Processing Center of Excellence College of Engineering University of Tehran Tehran Iran College of Engineering Sharif University of Technology Tehran Iran

ISBN: (纸本)9781457702419

Steady-State Visual Evoked Potentials (SSVEPs) are one of the most important EEG signals used in Human Computer Interface (HCI) systems. These signals are generated by Looking at flickering external light sources stimulating the central part of the retina. By increasing the number of external light sources, detection of the corresponding SSVEPs from the recorded EEG signal becomes more complicated. On the other hand, the ratio of the sensitivity to specificity in high-speed classifiers becomes more significant. This study presents the effect of the twinkling frequencies and the inter-sources distance of two Light Emitting Diodes (LEDs) on the ratio of the sensitivity to specificity of the two classes. The features used for signal classification is the amplitude of the main frequencies in the spectrum of each frequency pairs that is simply classified by the Max classifier. The purpose of this is to find the best twinkling frequencies and the best inter-sources distance among a set of predefined values when there are only two light sources in order to nearly equalize the sensitivity and the specificity. For this aim, seven different frequency pairs of LEDs in five distinct inter-sources distances are examined and it is shown that the best frequency pair is 10 and 15 Hz with inter-sources distances of 24 or 44 cm. © 2011 IEEE.

关键词： Light emitting diodes

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A finite-time tracker for nonholonomic systems using recursive singularity-free FTSM

A finite-time tracker for nonholonomic systems using recursi...

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作者： Mobayen, Saleh Yazdanpanah, Mohammad Javad Majd, Vahid Johari Intelligent Control Systems Lab. School of Electrical and Computer Engineering Tarbiat Modares University Tehran Iran Control and Intelligent Processing Center of Excellence School of Electrical and Computer Engineering University of Tehran Iran

ISBN: (纸本)9781457700804

A novel recursive singularity free FTSM (Fast Terminal Sliding Mode) strategy for finite time tracking control of nonholonomic systems is proposed. As a result, the singularity problem around the origin resulting from the fractional power of conventional terminal sliding mode is resolved. Simulation results are given for two benchmark examples of extended chained-form nonholonomic systems: a wheeled mobile robot and an underactuated surface vessel. The results show the effectiveness of the proposed strategy. © 2011 AACC American Automatic control Council.

关键词： Mobile robots

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A complete operational architecture of alert correlation

A complete operational architecture of alert correlation

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2011 International Conference on Computational Aspects of Social Networks, CASoN'11

作者： Amiri, Fatemeh Gharaee, Hossein Enayati, Ali Reza Center of Excellence: Control and Intelligent Processing of Electrical and Computer Engineering University of Tehran Tehran Iran Network Security Group Iran Telecommunication Research Center Tehran Iran

ISBN: (纸本)9781457711312

To defend against various attacks, many security systems such as intrusion detection systems are deployed into hosts and networks to better protect digital assets. However, there are well-known problems related to the current intrusion detection systems. To better understand security threats from various sources and take appropriate response, it is necessary to perform alert correlation. This paper proposes a general alert correlation architecture, including four important components: log management, alert correlation, incident response and knowledge base system. The focus is to describe most important operations in alert correlation component. The proposed architecture includes anomaly-based analysis in alert correlation component. Different techniques for alert correlation are reviewed and compared. This study proposes that a hybrid model of multiple techniques leads to better performance of alert correlation engine. © 2011 IEEE.

关键词： Security systems

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Analytic approximate solution to the nonlinear output regulation problem using Galerkin approximation method

Analytic approximate solution to the nonlinear output regula...

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作者： Khailaie, S. Adhami-Mirhosseini, A. Yazdanpanah, M.J. Control and Intelligent Processing Center of Excellence School of Electrical and Computer Engineering University of Tehran P.O. Box 14395/515 Tehran Iran

ISBN: (纸本)9783902661937

The present paper proposes an approximation method to solve the problem of approximate nonlinear output regulation. In this approach, the solution of the regulator equations, consists of partial differential equations and an algebraic equation, is analytically approximated by Galerkin approximation method. The proposed method is general and can be applied on a wide class of nonlinear systems that the output regulation problem is solvable for them. The effectiveness of the proposed method is investigated on the nonlinear output regulation problem for a benchmark mechanical system, the so-called TORA system. © 2011 IFAC.

关键词： Galerkin methods

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Astrocyte-inspired controller design for desynchronization of two coupled limit-cycle oscillators

Astrocyte-inspired controller design for desynchronization o...

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2011 3rd World Congress on Nature and Biologically Inspired Computing, NaBIC 2011

作者： Montaseri, Ghazal Yazdanpanah, Mohammad Javad Amiri, Mahmood School of Electrical and Computer Engineering University of Tehran Tehran Iran Control and Intelligent Processing Center of Excellence School of ECE University of Tehran Tehran Iran

ISBN: (纸本)9781457711237

In this paper, a biologically inspired controller is proposed for desynchronization of two coupled limit-cycle oscillators. Recently, researchers have shown that astrocyte has the potential to desynchronize the synchrony between two coupled neurons. So, first, based on the astrocyte model, the structure of the dynamic controller is suggested. Then, controller parameters are tuned through an optimization algorithm. The suggested controller has 3 important properties: 1) the controller desynchronizes the oscillators without any undesirable effects on the inherent behavior of oscillators (e.g. stopping, annihilating or starting divergent oscillations);2) it requires little effort to maintain the desirable desynchronized state;and 3) the controller is robust with respect to parameters variations. Simulation results reveal the efficiency of the proposed controller. © 2011 IEEE.

关键词： controllers

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