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2010 18th Iranian Conference on Electrical Engineering最新文献

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Design and stability analysis of an injection-locked frequency divider by two 注入锁定分频器的设计与稳定性分析
2010 18th Iranian Conference on Electrical Engineering Pub Date : 2010-05-11 DOI: 10.1109/IRANIANCEE.2010.5507102
Hosein Zargar, Mahmood Kamarei, M. Tayarani
{"title":"Design and stability analysis of an injection-locked frequency divider by two","authors":"Hosein Zargar, Mahmood Kamarei, M. Tayarani","doi":"10.1109/IRANIANCEE.2010.5507102","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2010.5507102","url":null,"abstract":"Design and stability analysis of an injection-locked frequency divider (FD) by order 2 in microwave band is presented. In this study, behavior of circuit in different input power and input frequency by means of stability analysis is explained. Finally bifurcation loci are calculated. The proposed techniques have been applied to the design of a frequency divider by order 2 operating at 8 GHz.","PeriodicalId":282587,"journal":{"name":"2010 18th Iranian Conference on Electrical Engineering","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132680072","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}
引用次数: 1
Estimation of simplified transient model parameters using genetic algorithm 基于遗传算法的简化暂态模型参数估计
2010 18th Iranian Conference on Electrical Engineering Pub Date : 2010-05-11 DOI: 10.1109/IRANIANCEE.2010.5506978
M. Bigdeli, E. Rahimpour
{"title":"Estimation of simplified transient model parameters using genetic algorithm","authors":"M. Bigdeli, E. Rahimpour","doi":"10.1109/IRANIANCEE.2010.5506978","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2010.5506978","url":null,"abstract":"A proper model is proposed in this paper for transient analysis of distribution transformers. The model is capable of representing the impedance or admittance characteristics of the transformer measured from the terminals under different terminal connections up to approximately 200 kHz. The model is simple, so that the simulation with this model is easy and fast. It is feasible to use the model as a two port element by network analyzing. To estimation of model parameters genetic algorithm have been used. The first stage, all necessary tests are carried out on the 2500 KVA, 6300/420 V transformer. Thereafter, the model parameters are estimated using genetic algorithm toolbox in MATLAB. The comparison between calculated and measured quantities confirms that the accuracy of the proposed method in the middle transient frequency domain is satisfactory.","PeriodicalId":282587,"journal":{"name":"2010 18th Iranian Conference on Electrical Engineering","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133806893","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}
引用次数: 11
Two element wideband Planar plate Monopole superdirective array 二元宽带平面平板单极子超定向阵列
2010 18th Iranian Conference on Electrical Engineering Pub Date : 2010-05-11 DOI: 10.1109/IRANIANCEE.2010.5507521
S. M. Mazinani, H. Hassani
{"title":"Two element wideband Planar plate Monopole superdirective array","authors":"S. M. Mazinani, H. Hassani","doi":"10.1109/IRANIANCEE.2010.5507521","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2010.5507521","url":null,"abstract":"A two element, closely spaced array of wideband planar monopole antennas to achieve superdirectivity is presented. In this study, three rectangular plate monopole structures, the simple Planar Monopole element (PM), the Planar Monopole element with Bevel (PMB), and the Planar Monopole element Loaded in its radiating edges with small rectangular Plates (PMLP) are considered as the array elements. In each case, the spacing and phase of excitation between the two elements is adjusted to achieve the highest directivity over the widest frequency band. It is shown that the PMLP antenna with element spacing of 2 cm can produce 7.6–10.1 dB of directivity over the 3–8 GHz band. This antenna has an efficiency of 60–91% over the bandwidth. Simulation and experimental results are provided and discussed.","PeriodicalId":282587,"journal":{"name":"2010 18th Iranian Conference on Electrical Engineering","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133818353","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}
引用次数: 3
A constructive approach for developing probabilistic programs 一种开发概率方案的建设性方法
2010 18th Iranian Conference on Electrical Engineering Pub Date : 2010-05-11 DOI: 10.1109/IRANIANCEE.2010.5507014
H. Haghighi
{"title":"A constructive approach for developing probabilistic programs","authors":"H. Haghighi","doi":"10.1109/IRANIANCEE.2010.5507014","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2010.5507014","url":null,"abstract":"Probabilistic techniques in computer programs are becoming more and more widely used. Therefore, there is a big interest in the formal specification, verification, and development of probabilistic programs. On the other hand, Martin-Löf's theory of types is an appropriate notation for formal program development since it allows us to express both specifications and programs within the same formalism. Furthermore, the proof rules of this theory can be used to derive a correct program from a specification as well as to verify that a given program has a certain property. In this paper, we augment Martin-Löf's theory of types with a simple probabilistic construct enabling us to specify probabilistic programs formally. Furthermore, having such a construct, we can derive functional, probabilistic programs from correctness proofs of their formal specifications written in the new type theoretical formalism.","PeriodicalId":282587,"journal":{"name":"2010 18th Iranian Conference on Electrical Engineering","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115202873","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}
引用次数: 1
DCOPF-based LMP calculation considering line reactive flows 考虑线路无功流的基于dcopf的LMP计算
2010 18th Iranian Conference on Electrical Engineering Pub Date : 2010-05-11 DOI: 10.1109/IRANIANCEE.2010.5506946
H. Saboori, S. Dehghan, S. Jadid
{"title":"DCOPF-based LMP calculation considering line reactive flows","authors":"H. Saboori, S. Dehghan, S. Jadid","doi":"10.1109/IRANIANCEE.2010.5506946","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2010.5506946","url":null,"abstract":"Fast and accurate algorithms to compute locational prices are vital for real time electricity markets. Most common method for evaluating LMPs in electricity markets is DCOPF-based approach. Major limitation of DCOPF is the error produced by neglecting the effect of reactive power flows in line loading. This paper describes a method to incorporate this effect. The method can be easily integrated into existing LMP calculation software because the computation remains based on DCOPF. The proposed method is applied to the PJM 5-bus system and to the IEEE 24-bus Reliability Test System. Simulation results show the accuracy as well as the efficiency of the proposed solution technique.","PeriodicalId":282587,"journal":{"name":"2010 18th Iranian Conference on Electrical Engineering","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124280133","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}
引用次数: 2
FMRI data analysis by blind source separation algorithms: A comparison study for nongaussian properties 基于盲源分离算法的FMRI数据分析:非高斯特性的比较研究
2010 18th Iranian Conference on Electrical Engineering Pub Date : 2010-05-11 DOI: 10.1109/IRANIANCEE.2010.5507112
M. Ghasemi, A. Mahloojifar
{"title":"FMRI data analysis by blind source separation algorithms: A comparison study for nongaussian properties","authors":"M. Ghasemi, A. Mahloojifar","doi":"10.1109/IRANIANCEE.2010.5507112","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2010.5507112","url":null,"abstract":"The application of Independent Component Analysis (ICA) to functional magnetic resonance imaging (FMRI) data has proven to be quite fruitful. In this sense, an important problem is different nongaussian properties of FMRI data that should be considered in ICA application. In this paper, we have experimentally compared nongaussian source separation ability of three ICA/BSS approaches for fMRI: Infomax, FastICA and JADE. The comparison study used both simulated fMRI-like data generated using the synthesis model and actual fMRI data performing an audio-visual stimulation task. The results were evaluated by task-related activation maps and associated time-courses. Based on our result, Infomax emerged as a reliable choice for the task followed by JADE. FastICA didn't perform reliably especially for sub-gaussian sources.","PeriodicalId":282587,"journal":{"name":"2010 18th Iranian Conference on Electrical Engineering","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116457129","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}
引用次数: 3
Prediction of state transitions in Rayleigh fading channels using particle filter 基于粒子滤波的瑞利衰落信道状态转移预测
2010 18th Iranian Conference on Electrical Engineering Pub Date : 2010-05-11 DOI: 10.1109/IRANIANCEE.2010.5507048
S. M. Alavi, M. Mahdavi, Ali Mohammad Doost Hosseini
{"title":"Prediction of state transitions in Rayleigh fading channels using particle filter","authors":"S. M. Alavi, M. Mahdavi, Ali Mohammad Doost Hosseini","doi":"10.1109/IRANIANCEE.2010.5507048","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2010.5507048","url":null,"abstract":"This paper presents a new method based on particle filter theory in the presence of non_gaussian noise of nvironment for cognitive radio systems. It has been shown that a broad and increasingly important class of non-Gaussian phenomena encountered in practice can be characterized as impulsive noise [1]. Herein alpha-stable distribution is proposed for such a noise. For the proposed noise model, we apply particle filter to estimate CIR, which is rooted in Bayesian estimation and Monte Carlo simulation. To our knowledge, the implementation of the Particle filter is novel for such a system. Furthermore we compared performance of Kalman filter and Particle filter in the presence of non_gaussian noise environment. Our results reveals that filter predictor has better results than Kalman filter for a non-Gaussian noise environment.","PeriodicalId":282587,"journal":{"name":"2010 18th Iranian Conference on Electrical Engineering","volume":"324 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123218588","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}
引用次数: 0
Independent-speaker isolated word speech recognition based on mean-shift framing using hybrid HMM/SVM classifier 基于均值移位帧的HMM/SVM混合分类器独立说话人孤立词语音识别
2010 18th Iranian Conference on Electrical Engineering Pub Date : 2010-05-11 DOI: 10.1109/IRANIANCEE.2010.5507082
K. Rahbar, A. Broumandnia
{"title":"Independent-speaker isolated word speech recognition based on mean-shift framing using hybrid HMM/SVM classifier","authors":"K. Rahbar, A. Broumandnia","doi":"10.1109/IRANIANCEE.2010.5507082","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2010.5507082","url":null,"abstract":"This paper studies an independent-speaker isolated word speech recognition based on mean-shift framing using hybrid HMM/SVM classifier. The proposed framework includes two main units: preprocessing unit, and classification unit. The first unit tries to segment the speech signal into proper frames using the benefits of mean-shift gradient clustering algorithm and extract time-frequency relevant features in a way that maximize relative entropy of time-frequency energy distribution among segments. Then the second unit classifies words into the proper classes. To fulfill this intention, self-adaptive HMM calculates word's likelihood of each existed class and finally support vector machine (SVM) classifies it by using all classes' likelihood as an input vector. To validate method's accuracy and stability, the method verified within TULIPS1 dataset in the present of different kind of additive noises provided by SPIB. Comparing the results with the outcomes of the previous paper shows 3.2% improvement.","PeriodicalId":282587,"journal":{"name":"2010 18th Iranian Conference on Electrical Engineering","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122162313","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}
引用次数: 3
Approximation of general nonlinear control systems with linear time varying systems 用线性时变系统逼近一般非线性控制系统
2010 18th Iranian Conference on Electrical Engineering Pub Date : 2010-05-11 DOI: 10.1109/IRANIANCEE.2010.5506987
M. Ramezani, A. Kamyad
{"title":"Approximation of general nonlinear control systems with linear time varying systems","authors":"M. Ramezani, A. Kamyad","doi":"10.1109/IRANIANCEE.2010.5506987","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2010.5506987","url":null,"abstract":"Since control of general nonlinear control systems is very difficult and there isn't any analytic solution for these systems specially for non affine nonlinear control systems, in this paper we propose a novel method for finding a Linear Time Varying (LTV) equivalent system for these systems based on solving a sequence of Linear Programming Problems (LPP) corresponding to our original problem. First, we transfer the original problem to a new problem in the form of calculus of variations. Then we discretize the new problem and try to solve it approximately by using Nonlinear Programming (NLP) methods. For this, the solution of our NLP problem is transferred to solution a sequence of LPP, such that empowering us to use powerful linear problem soft wares. Finally, efficiency of our method is confirmed by solving some nonlinear control problems.","PeriodicalId":282587,"journal":{"name":"2010 18th Iranian Conference on Electrical Engineering","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131019879","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}
引用次数: 2
A new quasi-elliptic UWB BPF with a sharp transition band using 3/4-wavelength SIRs 利用3/4波长SIRs设计了一种具有锐利过渡带的准椭圆型超宽带BPF
2010 18th Iranian Conference on Electrical Engineering Pub Date : 2010-05-11 DOI: 10.1109/IRANIANCEE.2010.5507095
Maryam Jouzdani, S. Sadri, A. Zeidaabadi Nezhad, G. Askari
{"title":"A new quasi-elliptic UWB BPF with a sharp transition band using 3/4-wavelength SIRs","authors":"Maryam Jouzdani, S. Sadri, A. Zeidaabadi Nezhad, G. Askari","doi":"10.1109/IRANIANCEE.2010.5507095","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2010.5507095","url":null,"abstract":"A new ultra-wideband (UWB) bandpass filter composed of two parallel coupled stepped impedance resonators (SIRs) is proposed. Each resonator is tapped with stepped-impedance open stubs at its center providing a very sharp transition band and two uniform open stubs at the junctions of the low- and high-impedance sections to slide the upper resonant modes. Two interdigital parallel coupled lines are used to enhance couplings at input and output of the circuit. A planar UWB bandpass filter with a quasi-elliptic function response and a fractional bandwidth of about 110% (from 3.1GHz to 10.6GHz) is designed and simulated by Ansoft HFSS EM simulator. Simulated response of the filter shows an insertion loss of 0.6 dB, a return loss of 15 dB and a flat group delay of 0.4 ns in the passband.","PeriodicalId":282587,"journal":{"name":"2010 18th Iranian Conference on Electrical Engineering","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130443794","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}
引用次数: 2
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