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Online monitoring of power transformers using impulse frequency response analysis 基于脉冲频率响应分析的电力变压器在线监测
2017 Iranian Conference on Electrical Engineering (ICEE) Pub Date : 2017-05-01 DOI: 10.1109/IRANIANCEE.2017.7985259
Hossein Rahimpour, S. Mitchell, Saeed Rahimpour
{"title":"Online monitoring of power transformers using impulse frequency response analysis","authors":"Hossein Rahimpour, S. Mitchell, Saeed Rahimpour","doi":"10.1109/IRANIANCEE.2017.7985259","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2017.7985259","url":null,"abstract":"With the recent development in smart grid systems, there is now a growing interest in the development of on-line monitoring techniques. This is to reduce the maintenance costs as well as minimizing the probability of unexpected outages, or potentially to prevent catastrophic failures in the electrical network.","PeriodicalId":161929,"journal":{"name":"2017 Iranian Conference on Electrical Engineering (ICEE)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132007921","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: 7
Spike sorting: Which clustering method should be chosen? Which circumstances affect this selection? 尖峰排序:应该选择哪种聚类方法?哪些情况会影响这种选择?
2017 Iranian Conference on Electrical Engineering (ICEE) Pub Date : 2017-05-01 DOI: 10.1109/IRANIANCEE.2017.7985109
Foozie Foroozmehr, Behzad Nazari, S. Sadri, Reyhaneh Rikhtehgaran
{"title":"Spike sorting: Which clustering method should be chosen? Which circumstances affect this selection?","authors":"Foozie Foroozmehr, Behzad Nazari, S. Sadri, Reyhaneh Rikhtehgaran","doi":"10.1109/IRANIANCEE.2017.7985109","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2017.7985109","url":null,"abstract":"There have been several researches on spike sorting, the process of detection, feature extraction and clustering neural signals generated by brain neurons. How accurate spike sorting is performed, determines how much the results are reliable. Therefore, selecting among several proposed methods for each spike sorting step is a very important task. In this paper, we want to answer this question for the clustering step. We used the most common feature extraction method, i.e. PCA and the first two principal components as features. In order to have fair judgment, 3 datasets with different noise levels were used. We compared some of the most popular methods, selecting between: model-based/non model-based, simple mixtures/Dirichlet process mixtures, Normal/t-distributions for observations, Bayesian/EM clustering. Eventually, some direct and some situation-based conclusions were obtained.","PeriodicalId":161929,"journal":{"name":"2017 Iranian Conference on Electrical Engineering (ICEE)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129983078","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
Spectrum sharing in cognitive radio networks using beamforming and two-path successive relaying 基于波束形成和双径连续中继的认知无线电网络频谱共享
2017 Iranian Conference on Electrical Engineering (ICEE) Pub Date : 2017-05-01 DOI: 10.1109/IRANIANCEE.2017.7985346
Samaneh Masrour, A. Bastami, Pouya Halimi
{"title":"Spectrum sharing in cognitive radio networks using beamforming and two-path successive relaying","authors":"Samaneh Masrour, A. Bastami, Pouya Halimi","doi":"10.1109/IRANIANCEE.2017.7985346","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2017.7985346","url":null,"abstract":"In this paper, we propose an effective beamforming scheme for spectrum sharing between the primary and secondary users of a relay-assisted cognitive radio network. In this scheme, two secondary base stations, by employing beamforming and two-path successive relaying (TPSR), transmit their signals to the secondary users, and at the same time, help the primary user to continuously transmit its signal to its destination. We design the beamforming scheme such that the achievable rate of the secondary network is maximized under the constraint that a quality of service (QoS) requirement is guaranteed for the primary network. To solve this optimization problem which is non-convex, we first use the semidefinite programming (SDP) relaxation technique to convert it to a convex problem and then find the solution using the randomization technique. The simulation results show that the performance of the system with increasing the number of secondary users remains satisfactory even when the number of secondary users is greater than the number of antennas employed for beamforming. This observation shows the effectiveness of this beamforming scheme for spectrum sharing.","PeriodicalId":161929,"journal":{"name":"2017 Iranian Conference on Electrical Engineering (ICEE)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133994618","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
An empirical study of the effect of profile and behavioral characteristics on the infiltration rate of socialbots 个人形象与行为特征对社交机器人渗透率影响的实证研究
2017 Iranian Conference on Electrical Engineering (ICEE) Pub Date : 2017-05-01 DOI: 10.1109/IRANIANCEE.2017.7985427
Mandana Khademi, Samaneh Hosseini Moghaddam, Maghsood Abbaspour
{"title":"An empirical study of the effect of profile and behavioral characteristics on the infiltration rate of socialbots","authors":"Mandana Khademi, Samaneh Hosseini Moghaddam, Maghsood Abbaspour","doi":"10.1109/IRANIANCEE.2017.7985427","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2017.7985427","url":null,"abstract":"A popular online social network (OSN) such as Twitter has attracted the interest of social criminals. Social criminals need to infiltrate social networks to achieve their goals. Socialbots imitate the actions that a human can do with a Twitter account, and also they work in a surreptitious way. They can influence on Twitter users, and infiltrate the Twitter social network. In this paper, 128 socialbot accounts are created in Twitter. They are different in profile characteristics and behavioral characteristics. The effect of different characteristics on the infiltration rate is investigated, and the best strategy of a socialbot which leads to increase the infiltration rate is found. Our results show that behavioral characteristics have noticeable effect on the infiltration rate, and the effect of profile characteristics on the infiltration rate is low.","PeriodicalId":161929,"journal":{"name":"2017 Iranian Conference on Electrical Engineering (ICEE)","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134010256","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
Bandwidth enhancement of the SIW cavity backed slot antennas using symmetric circular perturbation 利用对称圆摄动增强SIW腔背槽天线的带宽
2017 Iranian Conference on Electrical Engineering (ICEE) Pub Date : 2017-05-01 DOI: 10.1109/IRANIANCEE.2017.7985382
Fatemeh Heidarzadeh, M. H. Neshati
{"title":"Bandwidth enhancement of the SIW cavity backed slot antennas using symmetric circular perturbation","authors":"Fatemeh Heidarzadeh, M. H. Neshati","doi":"10.1109/IRANIANCEE.2017.7985382","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2017.7985382","url":null,"abstract":"In this paper, impedance bandwidth of a Substrate Integrated Waveguide (SIW) cavity backed slot antenna is improved using two symmetric circular perturbations at the two corners of an square cavity. By separating the resonant frequencies of the two degenerate modes including TE120 and TE210, impedance bandwidth is significantly improved. The proposed antenna is numerically investigated using High Frequency Simulator Structure (HFSS). A prototype of the antenna is also made using single layer of substrate. A part from a shift between simulation and measurement results of S11 due to fabrication imperfection, there is a good agreement between other radiation characteristics of the antenna. The measured impedance bandwidth of the proposed antenna is 5.7% at the center frequency of 14 GHz. According to the simulated and measured results, the proposed antenna provides desirable radiation performance such as high gain and high radiation efficiency compared to that of the conventional cavity backed slot antenna without perturbation. Moreover, the proposed antenna possesses the advantages of low profile, lightweight and easy integration with planar circuits.","PeriodicalId":161929,"journal":{"name":"2017 Iranian Conference on Electrical Engineering (ICEE)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134059704","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
Energy Efficient and delay aware power control in interference wireless networks 干扰无线网络中的节能和延迟感知功率控制
2017 Iranian Conference on Electrical Engineering (ICEE) Pub Date : 2017-05-01 DOI: 10.1109/IRANIANCEE.2017.7985305
Mahnaz Sinaie, M. Tohidi, P. Azmi
{"title":"Energy Efficient and delay aware power control in interference wireless networks","authors":"Mahnaz Sinaie, M. Tohidi, P. Azmi","doi":"10.1109/IRANIANCEE.2017.7985305","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2017.7985305","url":null,"abstract":"Designing energy efficient delay aware communication networks become an inevitable trend due to change of data traffic types. In this paper, we present an energy efficient and delay aware competitive power control in interference limited wireless networks. To achieve this goal, the utility function is defined as the ratio of effective capacity to power consumption which is termed Effective Energy Efficiency (EEE). Then, a non-cooperative game for power control algorithm is proposed. It is shown that the considered power control admits a Nash equilibrium (NE) which is guaranteed to be unique. Our analytical results show that NE has the same structure of spectral efficient design but with a different threshold. Furthermore, our simulation results show that our energy efficient game achieves EEE gains relative to spectral efficient game.","PeriodicalId":161929,"journal":{"name":"2017 Iranian Conference on Electrical Engineering (ICEE)","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133979682","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
A novel remote tunable maximum power point tracking controller implementation for photovoltaic systems 一种新型光伏系统远程可调最大功率点跟踪控制器的实现
2017 Iranian Conference on Electrical Engineering (ICEE) Pub Date : 2017-05-01 DOI: 10.1109/IRANIANCEE.2017.7985132
S. Ganjehfar, Younes Solgi, Alireza Mosajjal
{"title":"A novel remote tunable maximum power point tracking controller implementation for photovoltaic systems","authors":"S. Ganjehfar, Younes Solgi, Alireza Mosajjal","doi":"10.1109/IRANIANCEE.2017.7985132","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2017.7985132","url":null,"abstract":"Nowadays many studies have been done on renewable energies to overcome many difficulties of traditional energy consumption. Various kinds of renewable energy sources are available. One of the attractive fields for renewable energy researchers is photovoltaic (PV) systems. To ensure high efficiency of a PV system, numerous algorithms have been developed as maximum power point tracking (MPPT). This paper introduces a novel remote tunable maximum power point tracking (RTMPPT) controller implementation for photovoltaic systems. PV sites' controller which could be located in various regions can be managed or changed by a remote controller site using RTMPPT. The controller site is connected to all PV sites using a typical local area network (LAN) or the Internet. Since RTMPPT periodically updates the controller algorithm of each PV site, the effects of climate changes or seasonal temperature variation will be considered in the controller. Hence the controller is adaptive to variation of temperature and/or irradiation ensuring high efficiency in different climates.","PeriodicalId":161929,"journal":{"name":"2017 Iranian Conference on Electrical Engineering (ICEE)","volume":"9 7","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132935182","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
Designing model-free control law for slowly varying nonlinear systems based on reinforcement learning 基于强化学习的慢变非线性系统无模型控制律设计
2017 Iranian Conference on Electrical Engineering (ICEE) Pub Date : 2017-05-01 DOI: 10.1109/IRANIANCEE.2017.7985167
Amin Noori, M. Sadrnia, M. Sistani
{"title":"Designing model-free control law for slowly varying nonlinear systems based on reinforcement learning","authors":"Amin Noori, M. Sadrnia, M. Sistani","doi":"10.1109/IRANIANCEE.2017.7985167","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2017.7985167","url":null,"abstract":"A method to control general slowly varying nonlinear systems based on reinforcement learning is proposed. Based on the Q-leaning algorithm a model-free control signal is designed. However, this control signal is numerical and also not smooth enough. Thus a polynomial is fitted to the control signal obtained by Q-learning algorithm. A larger degree of polynomial leads to smaller fitting error. By this procedure, we have a smooth control signal which is easy to implement, moreover, the control signal is in a closed form and is not numerical any longer. This permits deep, elegant and powerful mathematical analysis of the nonlinear system and many properties of the system such as stability, controllability, chaos, limit cycles can be studied. The efficiency of the proposed technique is proved by using it in an example.","PeriodicalId":161929,"journal":{"name":"2017 Iranian Conference on Electrical Engineering (ICEE)","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132622437","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
An efficient interleaved high step-up converter with winding-cross-coupled inductor and common active clamp for photovoltaic applications 具有绕组交叉耦合电感和普通有源箝位的高效交错高升压变换器，用于光伏应用
2017 Iranian Conference on Electrical Engineering (ICEE) Pub Date : 2017-05-01 DOI: 10.1109/IRANIANCEE.2017.7985267
Afshin Amoorezaei, A. Abrishamifar
{"title":"An efficient interleaved high step-up converter with winding-cross-coupled inductor and common active clamp for photovoltaic applications","authors":"Afshin Amoorezaei, A. Abrishamifar","doi":"10.1109/IRANIANCEE.2017.7985267","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2017.7985267","url":null,"abstract":"This paper presents a high-efficiency and high-step up Non isolated interleaved dc-dc converter with a boost converter as clamp circuit. In the proposed converter, the coupled-inductor boost converters are interleaved. A boost converter is used to clamp the voltage stresses of all the switches in the interleaved converter, caused by the leakage inductances present in the practical coupled inductors, to a low voltage level. The leakage energies of the interleaved converters are collected in a clamp capacitor and recycled to the output by the boost converter. The proposed converter achieves high efficiency because of the recycling of the leakage energies to the output, reduction of the switch voltage stress, mitigation of the output diode's reverse recovery problem, and interleaving of the converters. Detailed analysis and design of the proposed converter are carried out. A simulation of the proposed converter with the PSPICE software is done, and its results are presented for validation of design.","PeriodicalId":161929,"journal":{"name":"2017 Iranian Conference on Electrical Engineering (ICEE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129398545","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
Plane wave against spherical wave assumption for non-uniform linear massive MIMO array structures in LOS condition 非均匀线性massive MIMO阵列结构在LOS条件下的平面波对球面波假设
2017 Iranian Conference on Electrical Engineering (ICEE) Pub Date : 2017-05-01 DOI: 10.1109/IRANIANCEE.2017.7985344
M. Tamaddondar, N. Noori
{"title":"Plane wave against spherical wave assumption for non-uniform linear massive MIMO array structures in LOS condition","authors":"M. Tamaddondar, N. Noori","doi":"10.1109/IRANIANCEE.2017.7985344","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2017.7985344","url":null,"abstract":"The massive capacity and connectivity requirements of the fifth generation (5G) wireless communication systems, have motivated the application of hundreds of antenna elements at the base station (BS). This kind of system known as massive multiple-input multiple-output (MIMO), offers a huge spectral and energy efficiency against traditional wireless communication techniques. As the number of antennas increases significantly in massive MIMO systems, the previous MIMO channel models will not be valid longer. One of the main issues is that the planar wavefront assumption cannot be considered over the massive MIMO arrays while spherical wavefronts are experienced. In this paper, the channel matrix of a multi-user (MU) massive MIMO system is derived for both the plane wave and spherical wave assumptions in the line-of-sight (LOS) condition, where the base station (BS) is equipped with a large non-uniform linear array of antennas. This non-uniformity causes to increase the orthogonality between sub-channels and the rank of the channel matrix. The obtained channel capacities are investigated by some simulation results.","PeriodicalId":161929,"journal":{"name":"2017 Iranian Conference on Electrical Engineering (ICEE)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132194766","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: 7
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