2026-06-09T21:41:22+03:30 http://ijeee.iust.ac.ir/browse.php?mag_id=33&slc_lang=en&sid=1

33-561 2026-06-09 10.1002

Iranian Journal of Electrical and Electronic Engineering IJEEE 1735-2827 1735-2827 2013 9 4 F Dabbagh Kashani f_dk@iust.ac.ir M R Hedayati Rad mrheda@gmail.com E Kazemian e_kazemian@iust.ac.ir Study of the beam propagation behavior through oceanic media is a challenging subject. In this paper, based on generalized Collins integral, the mean irradiance profile of Gaussian laser beam propagation through ocean is investigated. Power In Special Bucket (PIB) is calculated. Using analytical expressions and calculating seawater transmission, the effects of absorption and scattering on beam propagation are studied. Based on these formulae, propagation in ocean and atmosphere are compared. The effects of some optical and environmental specifications, such as divergence angle and chlorophyll concentration in seawater on beam propagation by using mean irradiance, PIB and analytical formula of oceanic transmission are studied. The calculated results are shown graphically. Propagation of Gaussian Beams Absorption and Scattering Extinction Coefficient Seawater Mean Irradiance 2013 12 01 197 203 http://ijeee.iust.ac.ir/article-1-561-en.pdf

33-555 2026-06-09 10.1002

Iranian Journal of Electrical and Electronic Engineering IJEEE 1735-2827 1735-2827 2013 9 4 L Hassan lab.has77@yahoo.com h sadati hsadati@aut.ac.ir j karimi karimi_j@alum.sharif.edu An integrated fuzzy guidance (IFG) law for a surface to air homing missile is introduced. The introduced approach is a modification of the well-known proportional navigation guidance (PNG) law. The IFG law enables the missile to approach a high maneuvering target while trying to minimize control effort as well as miss-distance in a two-stage flight. In the first stage, while the missile is far from the intended target, the IFG tends to have low sensitivity to the target maneuvering seeking to minimize the overall control effort. When the missile gets closer to the target, a second stage is started and IFG law changes tactic by increasing that sensitivity attempting to minimize the miss-distance. A fuzzy-switching point (FSP) controller manages the transition between the two stages. The FSP is optimized based on variety of scenarios some of which are discussed in the paper. The introduced scheme depends on line-of-sight angle rate, closing velocity, and target-missile relative range. The performance of the new IFG law is compared with PNG law and the results show a relative superiority in wide variety of flight conditions. Fuzzy Logic Homing Missile Proportional Navigation Guidance 2013 12 01 204 214 http://ijeee.iust.ac.ir/article-1-555-en.pdf

33-566 2026-06-09 10.1002

Iranian Journal of Electrical and Electronic Engineering IJEEE 1735-2827 1735-2827 2013 9 4 M H Refan refan@srttu.edu A Dameshghi adel_dameshghi@yahoo.com M Kamarzarrin Mehrnoosh_kamarzarrin@yahoo.com Differential base station sometimes is not capable of sending correction information for minutes, due to radio interference or loss of signals. To overcome the degradation caused by the loss of Differential Global Positioning System (DGPS) Pseudo-Range Correction (PRC), predictions of PRC is possible. In this paper, the Support Vector Machine (SVM) and Genetic Algorithms (GAs) will be incorporated for predicting DGPS PRC information. The Genetic Algorithm is employed to feature subset selection. Online training for real-time prediction of the PRC enhances the continuity of service on the differential correction signals and therefore improves the positioning accuracy in Real Time DGPS. Given a set of data received from low cost GPS module, the GASVM can predict the PRC precisely when the PRC signal is lost for a short period of time. This method which is introduced for the first time for prediction of PRC is compared to other recently published methods. The experiments show that the total RMS prediction error of GASVM is less than 0.06m for on step and 0.16m for 10 second ahead cases RTDGPS Pseudo-Range Correction Support Vector Machine Genetic Algorithm 2013 12 01 215 223 http://ijeee.iust.ac.ir/article-1-566-en.pdf

33-568 2026-06-09 10.1002

Iranian Journal of Electrical and Electronic Engineering IJEEE 1735-2827 1735-2827 2013 9 4 A Ghorbani-Nejad a.ghorbani@modares.ac.ir A Jannesari Jannesari@modares.ac.ir A two stage sub-µW Inverter-based switched-capacitor amplifier-filter is presented which is capable of amplifying both spikes and local field potentials (LFP) signals. Here we employ a switched capacitor technique for frequency tuning and reducing of 1/f noise of two stages. The reduction of power consumption is very necessary for neural recording devices however, in switched capacitor (SC) circuits OTA is a major building block that consumes most of the power. Therefore an OTA-less technique utilizing a class-C inverter is employed that significantly reduces the power consumption. A detailed analysis of noise performance for the inverter-based SC circuits is presented. A mathematical model useful for analysis of such SC integrators is derived and a good comparison is obtained between simulation and analytical technique. With a supply voltage of 0.7V and using 0.18 µm CMOS technology, this design can achieves a power consumption of about 538 nW. The designed amplifier-filter has the gains 18.6 dB and 28.2 dB for low pass only and cascaded filter, respectively. By applying different sampling frequencies, the filter attains a reconfigurable bandwidth. Amplifier-Filter Inverter-Based Switched-Capacitor Circuit Neural Recording 2013 12 01 224 231 http://ijeee.iust.ac.ir/article-1-568-en.pdf

33-545 2026-06-09 10.1002

Iranian Journal of Electrical and Electronic Engineering IJEEE 1735-2827 1735-2827 2013 9 4 B Rezaeealam rezaeealam@gmail.com The purpose of this paper is to introduce a new technique for row spacing measurement in a wire array using giant magnetoresistive (GMR) sensor. The self-rectifying property of the GMR-based probes leads to accurately detection of the magnetic field fluctuations caused by surface-breaking cracks in conductive materials, shape-induced magnetic anisotropy, etc. The ability to manufacture probes having small dimensions and high sensitivity (11 mV/mT) to low magnetic fields over a broad frequency range (from dc up to 1 MHz) enhances the spatial resolution of such a probe that is applicable to eddy current testing (ECT) techniques. Here, an AC uniform magnetic field is formed using a Helmholtz coil in which by scanning the probe over an array of acupuncture needles, the distances between them are detected. The results verified the possibility and the performance of the proposed row spacing measurement using GMR sensor. Spacing Measurement GMR Sensor 2013 12 01 232 236 http://ijeee.iust.ac.ir/article-1-545-en.pdf

33-570 2026-06-09 10.1002

Iranian Journal of Electrical and Electronic Engineering IJEEE 1735-2827 1735-2827 2013 9 4 Y Damchi damchi_pe@yahoo.com J Sadeh sadeh@um.ac.ir Appropriate operation of protection system is one of the effective factors to have a desirable reliability in power systems, which vitally needs routine test of protection system. Precise determination of optimum routine test time interval (ORTTI) plays a vital role in predicting the maintenance costs of protection system. In the most previous studies, ORTTI has been determined while remote back-up protection system was considered fully reliable. This assumption is not exactly correct since remote back-up protection system may operate incorrectly or fail to operate, the same as the primary protection system. Therefore, in order to determine the ORTTI, an extended Markov model is proposed in this paper considering failure probability for remote back-up protection system. In the proposed Markov model of the protection systems, monitoring facility is taken into account. Moreover, it is assumed that the primary and back-up protection systems are maintained simultaneously. Results show that the effect of remote back-up protection system failures on the reliability indices and optimum routine test intervals of protection system is considerable. Markov Model Monitoring Primary and Remote Back-Up Protection Systems Reliability Routine Test Time Interval 2013 12 01 237 245 http://ijeee.iust.ac.ir/article-1-570-en.pdf

33-559 2026-06-09 10.1002

Iranian Journal of Electrical and Electronic Engineering IJEEE 1735-2827 1735-2827 2013 9 4 R Subramanian ssst.m1m2m3@gmail.com K Thanushkodi thanush12@gmail.com A Prakash prksh830@gmail.com The Economic Load Dispatch (ELD) problems in power generation systems are to reduce the fuel cost by reducing the total cost for the generation of electric power. This paper presents an efficient Modified Firefly Algorithm (MFA), for solving ELD Problem. The main objective of the problems is to minimize the total fuel cost of the generating units having quadratic cost functions subjected to limits on generator true power output and transmission losses. The MFA is a stochastic, Meta heuristic approach based on the idealized behaviour of the flashing characteristics of fireflies. This paper presents an application of MFA to ELD for six generator test case system. MFA is applied to ELD problem and compared its solution quality and computation efficiency to Genetic algorithm (GA), Differential Evolution (DE), Particle swarm optimization (PSO), Artificial Bee Colony optimization (ABC), Biogeography-Based Optimization (BBO), Bacterial Foraging optimization (BFO), Firefly Algorithm (FA) techniques. The simulation result shows that the proposed algorithm outperforms previous optimization methods. Artificial Bee Colony optimization Bio geography-Based Optimization Economic Load Dispatch Firefly Algorithm Genetic Algorithm Particle Swarm Optimization 2013 12 01 246 252 http://ijeee.iust.ac.ir/article-1-559-en.pdf