N. Noorizadeh, K. Kazemi, R. Grebe, M. Helfroush, M. Mahmoudzadeh, N. Golshaeyan, F. Wallois
{"title":"Symmetric brain atlas template for newborns brain asymmetry studies","authors":"N. Noorizadeh, K. Kazemi, R. Grebe, M. Helfroush, M. Mahmoudzadeh, N. Golshaeyan, F. Wallois","doi":"10.1109/IRANIANCEE.2013.6599703","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2013.6599703","url":null,"abstract":"Since the human brain has a certain degree of asymmetry, asymmetry analysis based on an asymmetric brain template may result in ambiguity. Therefore, in this paper we present our framework to create a symmetric brain template from a group of newborns aged between 39 to 42 weeks after gestation. Consequently, the resulting template shows no difference between its original and its flipped version as is the case for an asymmetric template. The resulting symmetric template can be used e.g. for brain asymmetry analysis in language development.","PeriodicalId":383315,"journal":{"name":"2013 21st Iranian Conference on Electrical Engineering (ICEE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129152962","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Compressed receiver for ultra-wideband communication","authors":"Abbas Akbarpour-Kasgari, S. N. Esfahani","doi":"10.1109/IRANIANCEE.2013.6599664","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2013.6599664","url":null,"abstract":"The high bandwidth of ultra-wideband (UWB) communication which uses ultra-short pulses, makes Nyquist sampling a formidable challenge. Therefore, compressed sensing is used to overcome this problem. In this paper, a compressed system is used and two different compressed receivers are designed and developed for UWB communication systems. One of them is based on the channel estimation and RAKE receiver and the other one is based on a GLRT detector. Both of them use minimum samples. The signaling scheme is pilot based. Simulation results are shown that these receivers have a comparable performance to the conventional and Nyquist rate based receivers.","PeriodicalId":383315,"journal":{"name":"2013 21st Iranian Conference on Electrical Engineering (ICEE)","volume":"108 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132511644","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A new linearization technique for CMOS low noise amplifiers with balun circuitry","authors":"M. Barati, B. Jafari, M. Yavari","doi":"10.1109/IRANIANCEE.2013.6599782","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2013.6599782","url":null,"abstract":"In this paper, a new linearization technique for differential low noise amplifiers (LNAs) is introduced. It removes the common-mode current at all frequencies. One of its main advantages is that it allows the receiver to have a single-ended input and a differential output LNA which attenuates even-order inter-modulations. Also, this technique improves the LNA linearity in three ways. Firstly, it removes the common-mode current of all inter-modulations. Secondly, it attenuates even-order inter-modulations because of its balun circuitry operation. Finally, it improves the third input intercept point (IIP3) due to the possibility of different bias currents for input transistors. Simulation results using a 0.18μm RF-CMOS technology with HSPICE-RF show that the IIP3 improves about 13 dBm at the expense of increasing the noise figure about 0.7 dB in constant voltage gain and equal DC-power respected to the conventional differential LNA.","PeriodicalId":383315,"journal":{"name":"2013 21st Iranian Conference on Electrical Engineering (ICEE)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128991934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Metallic nanostructures for enhancement of absorption in thin-film solar cells","authors":"F. Armin, M. Mirsalehi","doi":"10.1109/IRANIANCEE.2013.6599796","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2013.6599796","url":null,"abstract":"In this paper, a novel structure is proposed to enhance the absorption of light in thin-film solar cells by surface plasmons excited on metallic nano-rods. The excitation of surface plasmons on these nano-rods that are implemented in amorphous hydrogenated silicon is realized by a two-dimensional array of metallic nanoparticles. This array, which consists of nonresonant plasmonic nanoparticles, can be mounted on the anti-reflection coating of the solar cells.","PeriodicalId":383315,"journal":{"name":"2013 21st Iranian Conference on Electrical Engineering (ICEE)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123199157","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ali Baradaran Rezaeii, Leila Hasseli, Tohid Moradi
{"title":"A 125MS/s self-latch low-power comparator in 0.35μm CMOS process","authors":"Ali Baradaran Rezaeii, Leila Hasseli, Tohid Moradi","doi":"10.1109/IRANIANCEE.2013.6599865","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2013.6599865","url":null,"abstract":"A 125 MS/s self-latch low-power comparator in 0.35 μm CMOS process is presented. This structure is a rail-to-rail folded-cascode amplifier and a positive feedback connection of two back-to-back inverters in which only reset switches are used for controlling. A limited time is not allocated for the evaluation phase and instead the latch sequence starts itself, only after the evaluated voltage reaches to a desired level. Having sufficient time for producing the necessary evaluated voltage, of course in correct direction, guaranties the validity of the comparator operation; it means higher accuracy. Controlling the comparator is easy due to the special structure(using less controlling switches) and the layout is very compact with die size of about 34*14(μm)2. The comparator has been examined in all situations such as different corners, power supply noise of 300 m Vp-p and input voltage range of 1.6 Vp-p with 1 mV accuracy. The total power consumption of the comparator and corresponding readout circuitry is only 300 μW. The results show that the kick-back noise and the clock feed-through are reduced as well.","PeriodicalId":383315,"journal":{"name":"2013 21st Iranian Conference on Electrical Engineering (ICEE)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121602065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Learning low-dimensional subspaces via sequential subspace fitting","authors":"M. Sadeghi, M. Joneidi, H. Golestani","doi":"10.1109/IRANIANCEE.2013.6599895","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2013.6599895","url":null,"abstract":"In this paper we address the problem of learning low-dimensional subspaces using a given set of training data. To this aim, we propose an algorithm that performs by sequentially fitting a number of low-dimensional subspaces to the training data. Once we found a subset of the training data that is sufficiently near a fitted subspace, we omit these signals from the set of training signals and repeat the same procedure for the remaining signals until all training signals are assigned to a subspace. We then propose a robust version of the algorithm to address the situation in which the training signals are contaminated by additive white Gaussian noise (AWGN). Experimental results on both synthetic and real data show the promising performance of our proposed algorithm.","PeriodicalId":383315,"journal":{"name":"2013 21st Iranian Conference on Electrical Engineering (ICEE)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126293304","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Masoud Bashari, Mahmoud Salamati, Mohamad Tavakkolinia, A. Rahimi-Kian
{"title":"A dynamic GA-based approach for optimal short-term operation of a micro-grid","authors":"Masoud Bashari, Mahmoud Salamati, Mohamad Tavakkolinia, A. Rahimi-Kian","doi":"10.1109/IRANIANCEE.2013.6599530","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2013.6599530","url":null,"abstract":"This paper presents a dynamic non-linear model of a micro-grid and then applies the GA algorithm to optimally manage the short-term operation of the studied micro-grid. The original calculus of variations method has been modified and augmented with GA-algorithm to solve non-linear optimal control problems, such as the optimal short-term operation of a micro-grid with nonlinear dynamics. To validate the proposed dynamic model of the selected micro-grid and to evaluate the accuracy and performance of the developed GA-based optimization algorithm a simulation case study is presented and the obtained results are analyzed and compared with the simplified LQR problem using the Lagrange Multipliers (LM) theory(where the nonlinearity of the micro-grid model is ignored). The simulation results clearly show the superiority of the proposed method in this paper versus the original LQR modeling and optimization using the LM theory.","PeriodicalId":383315,"journal":{"name":"2013 21st Iranian Conference on Electrical Engineering (ICEE)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126294667","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Designing interval type-2 fuzzy controllers by Sarsa learning","authors":"Nooshin Nasri Mohajeri, M. Sistani","doi":"10.1109/IRANIANCEE.2013.6599660","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2013.6599660","url":null,"abstract":"In this paper, new Interval type-2 fuzzy controllers, which are designed by Sarsa learning, are proposed. The porposed controllers are A2-C0 Takagi-Sugeno-Kang type. Therefore, the antecedent part of rules is formed by fuzzy type-2 sets and the consequent part is comprised of possible actions. In the output processing section of fuzzy type-2 controllers, in addition to, Karnik-Mendel type reducer accompanied by centroid deffuzification, another output processor called BMM method is applied. Consequently, IT2FSL-KM and IT2FSL-BMM are generated. These new controllers are compared with other fuzzy controllers designed by RL methods in truck backing control problem. Simulation results represent the efficiency and effectiveness of proposed controllers in noiseless and noisy environment.","PeriodicalId":383315,"journal":{"name":"2013 21st Iranian Conference on Electrical Engineering (ICEE)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116575956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Multi-objective optimization based approaches for hybrid power filter design","authors":"H. Imani, A. Mohamed, Hussain Shreef, M. Eslami","doi":"10.1109/IRANIANCEE.2013.6599762","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2013.6599762","url":null,"abstract":"This paper introduces an optimal hybrid power filter design method to compensate simultaneously current harmonics and reactive power of a nonlinear load. The hybrid power filter consists of a passive RL low-pass filter placed in series with the load and an active filter which has RL elements connected in series with insulated gate bipolar transistors (IGBT) based voltage source converter. The filter is supposed to inject a current into the connection node of the load and grid in order to eliminate current harmonics and its imaginary current. The voltage source converter is placed in a hysteresis feedback control loop to generate the reference current. The band width and output amplitude of the hysteresis controller are optimized with inductance of RL filters. In solving the optimization problem, three objective functions are considered which include minimizing current total harmonic distortion (THD), maximizing power factor and minimizing the IGBT bridge current. The two optimization methods applied are non-dominated sorting genetic algorithm-II (NSGA-II) and strength Pareto evolutionary algorithm2 (SPEA2) methods. The results of the two optimization methods are compared and it is shown that the SPEA2 method gives the best performance in terms of minimizing current THD, maximizing the power factor and reducing IGBT bridge current.","PeriodicalId":383315,"journal":{"name":"2013 21st Iranian Conference on Electrical Engineering (ICEE)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114292552","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Design investigation of a dual band, dual polarized probe-fed DRAntenna feeding by SIW cavity","authors":"A. Moosaei, M. H. Neshati, M. Rezaee","doi":"10.1109/IRANIANCEE.2013.6599730","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2013.6599730","url":null,"abstract":"In this paper, a new dual band dual polarized probe fed Dielectric Resonator Antenna (DRA) exciting by substrate integrated waveguide (SIW) is presented. The design is based on the degenerated modes TE102 and TE201, which are co-exist in the SIW square cavity and adjustedby a corner cut. In the proposed antenna only one input port is used for two bands and to avoid parasitic radiation, the DR is located on the ground plane and fed by two probes which are placed in regions of maximum electric field. Simulation and results exhibit excellent performance with a cross-polar level of 17 dB lower than to that of the co-polar level and gain of 3.7 dBi at 5.91 GHz and a cross-polar level of 11 dB lower than that of the co-polar level and gain of 4.7 dBi at 6.37 GHz.","PeriodicalId":383315,"journal":{"name":"2013 21st Iranian Conference on Electrical Engineering (ICEE)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122693982","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}