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2010 18th Iranian Conference on Electrical Engineering最新文献

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Modeling of Floating-Body effect on Negative Bias Temperature Instability degradation of double-gate MOSFETs 双栅mosfet负偏置温度不稳定性退化的浮体效应建模
2010 18th Iranian Conference on Electrical Engineering Pub Date : 2010-05-11 DOI: 10.1109/IRANIANCEE.2010.5507047
Nayereh Ghobadi, A. Afzali-Kusha, E. Asl-Soleimani
{"title":"Modeling of Floating-Body effect on Negative Bias Temperature Instability degradation of double-gate MOSFETs","authors":"Nayereh Ghobadi, A. Afzali-Kusha, E. Asl-Soleimani","doi":"10.1109/IRANIANCEE.2010.5507047","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2010.5507047","url":null,"abstract":"In this paper, the effect of Floating-Body (FB) on the Negative Bias Temperature Instability (NBTI) degradation of undoped double-gate (DG) MOSFETs is modeled and investigated through solving the one-dimensional (1-D) Poisson's equation considering the NBTI effect in the inversion region. The accuracy of the model is verified by the finite difference method (FDM). The results of the model are in very good agreement with those of the numerical method. These results show that in FB devices, the accumulation of the NBTI stress generated electrons in the device floating body, leads to a decrease in the body potential, oxide field, and inversion charge and as a result decrease the generation of interface traps and degradation of device. Moreover, in devices with thinner body, the volume density of generated electrons is larger which result in more degradation of the oxide field and inversion charge density in these devices.","PeriodicalId":282587,"journal":{"name":"2010 18th Iranian Conference on Electrical Engineering","volume":"10 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":"124452903","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
Design and implementation of an ultra wide band dielectric resonator antenna for communication systems 通信系统超宽带介质谐振器天线的设计与实现
2010 18th Iranian Conference on Electrical Engineering Pub Date : 2010-05-11 DOI: 10.1109/IRANIANCEE.2010.5507100
M. Niroo Jazi, T. Denidni
{"title":"Design and implementation of an ultra wide band dielectric resonator antenna for communication systems","authors":"M. Niroo Jazi, T. Denidni","doi":"10.1109/IRANIANCEE.2010.5507100","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2010.5507100","url":null,"abstract":"In this paper, a new hybrid monopole dielectric resonator antenna is proposed. Two different methods of impedance matching and dielectric shaping are applied to enhance the antenna performance. Both simulated and measured results show clearly an ultra wide-bandwidth operation of more than 10.5 GHz ranging from 1.5 GHz to 12 GHz. Furthermore, the radiation pattern of the proposed antenna is nearly omni-directional over the frequency operating bandwidth.","PeriodicalId":282587,"journal":{"name":"2010 18th Iranian Conference on Electrical Engineering","volume":"3 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":"124189312","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
Applying the RMMAC methodology to an unstable plant RMMAC方法在不稳定工厂中的应用
2010 18th Iranian Conference on Electrical Engineering Pub Date : 2010-05-11 DOI: 10.1109/IRANIANCEE.2010.5506986
V. Hassani, M. Athans, A. Pascoal
{"title":"Applying the RMMAC methodology to an unstable plant","authors":"V. Hassani, M. Athans, A. Pascoal","doi":"10.1109/IRANIANCEE.2010.5506986","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2010.5506986","url":null,"abstract":"In this paper we revisit previous work on Robust Multiple Models Adaptive Control (RMMAC) of uncertain plants [1]. RMMAC was originally developed to control open-loop stable plants. We formulate and study the problem of robust adaptive control of open-loop unstable plants with structured and unstructured uncertainty in the presence of external disturbances and measurement noises, an issue that poses considerable theoretical and practical challenges. In particular, we show, with the help of an example, how a slight modification of the technique introduced in previous work on the RMMAC for stable plants yields a methodology that has the potential to deal with unstable plants. A design example and several nontrivial computer simulations are presented and discussed.","PeriodicalId":282587,"journal":{"name":"2010 18th Iranian Conference on Electrical Engineering","volume":"1 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":"125848061","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: 4
Comparison of noise reduction techniques in RF SQUID magnetic detection systems 射频SQUID磁检测系统降噪技术的比较
2010 18th Iranian Conference on Electrical Engineering Pub Date : 2010-05-11 DOI: 10.1109/IRANIANCEE.2010.5507029
N.M.S. Jahed, F. Sarreshtedari, F. Forooghi, M. Fardmanesh, J. Schubert, M. Banzet
{"title":"Comparison of noise reduction techniques in RF SQUID magnetic detection systems","authors":"N.M.S. Jahed, F. Sarreshtedari, F. Forooghi, M. Fardmanesh, J. Schubert, M. Banzet","doi":"10.1109/IRANIANCEE.2010.5507029","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2010.5507029","url":null,"abstract":"The noise level of the magnetometer and gradiometer RF SQUIDs were investigated using different shielding methods. The used methods include different active and passive shielding, such as Helmholtz configurations, locally compensation coils, superconducting bulks and μ-metal shields. For the passive shielding approach, using FEM simulation we have investigated the shielding effectiveness of superconducting bulks versus the use of μ-metal shielding. The superconducting shield is a YBCO circular bulk, which was made using melt-texture method and located in a distance in front of the SQUID. In this work the results of these shielding methods are presented and compared, while their effectiveness is discussed by measuring the noise spectrum of the SQUIDs in each configuration.","PeriodicalId":282587,"journal":{"name":"2010 18th Iranian Conference on Electrical Engineering","volume":"39 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":"126857520","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
A multi objective genetic algorithm for weighted load shedding 加权减载的多目标遗传算法
2010 18th Iranian Conference on Electrical Engineering Pub Date : 2010-05-11 DOI: 10.1109/IRANIANCEE.2010.5506954
M. T. Hagh, Sarah Galvani
{"title":"A multi objective genetic algorithm for weighted load shedding","authors":"M. T. Hagh, Sarah Galvani","doi":"10.1109/IRANIANCEE.2010.5506954","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2010.5506954","url":null,"abstract":"Load shedding during contingency conditions is an efficient solution to alleviate transmission lines over loadings. Minimization of total load shedding considering loads importance has great significance in these situations. This problem requires simultaneous optimization of two or more conflicting objectives, such as minimization of the total load shedding, minimization of transmission lines over loadings and voltage violations minimization. The objectives are in conflict since the improvement of one of them leads to the deterioration of another. A modified version of Non-Dominated Sorting Genetic Algorithm (NSGA-II) is used as an effective optimization tools for solving the minimum weighted load shedding problem during contingency conditions. Also relation between transmission lines overloading and amount of load shedding is surveyed. IEEE 14 bus test system is used as a study case and results are discussed.","PeriodicalId":282587,"journal":{"name":"2010 18th Iranian Conference on Electrical Engineering","volume":"195 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":"122311118","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: 18
MIMO capacity improvement in the presence of antenna mutual coupling 天线互耦时MIMO容量的提高
2010 18th Iranian Conference on Electrical Engineering Pub Date : 2010-05-11 DOI: 10.1109/IRANIANCEE.2010.5507080
R. Mohammadkhani, J. Thompson
{"title":"MIMO capacity improvement in the presence of antenna mutual coupling","authors":"R. Mohammadkhani, J. Thompson","doi":"10.1109/IRANIANCEE.2010.5507080","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2010.5507080","url":null,"abstract":"Applying MIMO technology in small wireless devices leads to closely spaced antennas, which results in antenna mutual coupling (MC) and highly correlated signals. In this paper, we investigate the effect of the terminal load impedance of the antennas on the MIMO capacity in the presence of the mutual coupling. We use a new concept of receiving mutual impedances to model the MC effect, which has been shown to have a much better performance than the conventional open-circuit voltage method in different applications of array antennas. Simulation results for a 2×2 MIMO system with half-wavelength dipoles in different scattering distribution scenarios, show that in our proposed method, an optimum value of the terminal load impedance ZL of the antennas can be obtained to maximise the capacity for all scattering distributions, whereas the conventional methods need to different ZL in different scattering scenarios.","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":"130722481","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: 6
Adaptive bit rate scheme for a LEO satellite link 低轨道卫星链路的自适应比特率方案
2010 18th Iranian Conference on Electrical Engineering Pub Date : 2010-05-11 DOI: 10.1109/IRANIANCEE.2010.5507519
M. Hosseini, M. Hakkak, P. Rezaei
{"title":"Adaptive bit rate scheme for a LEO satellite link","authors":"M. Hosseini, M. Hakkak, P. Rezaei","doi":"10.1109/IRANIANCEE.2010.5507519","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2010.5507519","url":null,"abstract":"The paper aims to investigate the advantages of using adaptive bit rate in the communication link of a Low Earth Orbit (LEO) satellite. While doing the study, it is assumed that there is a communication subsystem on-board responsible for gathering the information sent by a number of ground data collection platforms. The subsystem which operates based on Store-And-Forward (SAF) scenario, contains two communication links, one for receiving data from ground platforms (Store case), and the other for forwarding the stored data to an Earth station (Forward case). In fact, the current work aims to improve the volume of the data forwarded to Earth station. To this end, the Forward case bit rate is varied adaptively, and then by analyzing the power budget in a practical condition, the improvement achieved is evaluated. The results specifically obtained for a sample (data collecting) LEO satellite shows that utilizing adaptive bit rate instead of fixed bit rate can increase the daily data exchange up to about 100%. Although the scheme is only applied to a data collecting LEO satellite link, it still maintains its own generality.","PeriodicalId":282587,"journal":{"name":"2010 18th Iranian Conference on Electrical Engineering","volume":"1 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":"130560372","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
Hysteresis nonlinearity identification by using RBF neural network approach 基于RBF神经网络的迟滞非线性辨识
2010 18th Iranian Conference on Electrical Engineering Pub Date : 2010-05-11 DOI: 10.1109/IRANIANCEE.2010.5506985
M. Firouzi, Saeed Bagheri Shouraki, M. Zakerzadeh
{"title":"Hysteresis nonlinearity identification by using RBF neural network approach","authors":"M. Firouzi, Saeed Bagheri Shouraki, M. Zakerzadeh","doi":"10.1109/IRANIANCEE.2010.5506985","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2010.5506985","url":null,"abstract":"In systems with hysteresis behavior like magnetic cores, Piezo actuators, Shape Memory Alloy(SMA), we essentially need an accurate modeling of hysteresis either for design or performance evaluation; also in some control applications accurate system identification is needed. One of the famous methods of Hysteresis modeling is Preisach model. In this numerical method hysteresis is modeled by linear combination of smaller hysteresis loops as an elemental operator and local memory. In this paper we discuss those Radial Base artificial neural networks (RBF) which provides natural settings in accordance with the Preisach model. It is shown that the proposed approach can represent hysteresis modeling accurately in compare with classical Preisach model and can be used for many applications such as hysteresis nonlinearity control, hysteresis identification and realization for performance evaluation and system design. For evaluation we use measured experimental data from hysteresis SMA wire as an actuator.","PeriodicalId":282587,"journal":{"name":"2010 18th Iranian Conference on Electrical Engineering","volume":"50 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":"131388965","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
Precise prediction of conducted EMI in PWM flyback converters PWM反激变换器传导电磁干扰的精确预测
2010 18th Iranian Conference on Electrical Engineering Pub Date : 2010-05-11 DOI: 10.1109/IRANIANCEE.2010.5506973
Z. Emami, H. Farzanefard, S. R. Motahari
{"title":"Precise prediction of conducted EMI in PWM flyback converters","authors":"Z. Emami, H. Farzanefard, S. R. Motahari","doi":"10.1109/IRANIANCEE.2010.5506973","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2010.5506973","url":null,"abstract":"prediction of electromagnetic interference (EMI) allows evaluation of EMI performances at the design stage and before prototyping. It can also help reduce the prototype cost by minimizing late redesign. A practical EMI measurement system has been suggested to extract more information from EMI noise through analysis in frequency-domain and time-domain, and to test equipment emitting EMI to comply with electromagnetic compatibility (EMC) standards.","PeriodicalId":282587,"journal":{"name":"2010 18th Iranian Conference on Electrical Engineering","volume":"269 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":"134603430","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: 8
Hardware implementation of a novel adaptive version of Deflate compression algorithm 一种新的自适应Deflate压缩算法的硬件实现
2010 18th Iranian Conference on Electrical Engineering Pub Date : 2010-05-11 DOI: 10.1109/IRANIANCEE.2010.5507007
M. Tahghighi, M. Mousavi, P. Khadivi
{"title":"Hardware implementation of a novel adaptive version of Deflate compression algorithm","authors":"M. Tahghighi, M. Mousavi, P. Khadivi","doi":"10.1109/IRANIANCEE.2010.5507007","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2010.5507007","url":null,"abstract":"In data compression or source coding algorithms, input sequences of symbols are converted to shorter sequences while the original information remains unchanged. One of the well-known data compression algorithms is Deflate which is designed based on the LZ method. Deflate method has three different modes where its second mode is applicable for real-time applications. In this mode, a certain static table of Huffman codes is employed during the coding procedure. In this paper, a new version of deflate algorithm is proposed and implemented in hardware. In the proposed method, a new basic coding table is employed. This table is modified adaptively based on the input sequence. Simulation results show that in this adaptive algorithm, the coding performance is improved. In the hardware implementation of the new method, through some parallelism concepts, we try to improve the hardware utilization and throughput.","PeriodicalId":282587,"journal":{"name":"2010 18th Iranian Conference on Electrical Engineering","volume":"1 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":"130498231","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: 15
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