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2019 27th Iranian Conference on Electrical Engineering (ICEE)最新文献

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Designing SAW Assisted Multi-Mode Plasmonic Sensor SAW辅助多模等离子体传感器的设计
Pub Date : 2019-04-01 DOI: 10.1109/IranianCEE.2019.8786459
Mohammad Mahdi Mehrnegar, M. Moravvej-Farshi, S. Darbari
We propose a multi-mode plasmonic surface acoustic wave (SAW) based sensor. Utilizing SAW, we have designed a dual-segment grating that can excite multi-mode surface plasmons. These modes behave differently by variation of target or environment refractive indices. This behavior can lead to a more accurate precision in sensing the target material by eliminating the interfering effect of fluid. Moreover, the proposed sensor is capable of determining the thickness of a known target.
提出一种基于多模等离子体表面声波(SAW)的传感器。利用声表面波,我们设计了一种能激发多模表面等离子体的双段光栅。这些模式由于目标或环境折射率的变化而表现不同。这种特性可以消除流体的干扰效应,从而提高对目标材料的传感精度。此外,所提出的传感器能够确定已知目标的厚度。
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引用次数: 0
Correlation-Based Regularized Common Spatial Patterns for Classification of Motor Imagery EEG Signals 基于相关的正则化公共空间模式运动图像脑电信号分类
Pub Date : 2019-04-01 DOI: 10.1109/IranianCEE.2019.8786490
Khatereh Darvish Ghanbar, T. Y. Rezaii, M. Tinati, A. Farzamnia
Common Spatial Patterns (CSP) is a powerful and common method for effective feature extraction and dimensionality reduction in Brain-Computer Interface (BCI) applications. However CSP has some shortcomings, particularly, it is sensitivity to noise and outlier data which results in lower classification accuracy. In this paper, we propose a regularized version of the original CSP (Corr-CSP), in which the objective function is penalized by a properly designed penalty term which encourages decorrelation between the data from two classes in such a way that the resulting objective function has still straightforward solution through Eigen value decomposition. Furthermore, we have used three different datasets from the BCI Competition BCI database in order to evaluate the performance of the proposed approach and compare it to the original CSP. The simulation results show on the average 4% of improvement in terms of classification accuracy for the proposed Corr-CSP approach.
公共空间模式(CSP)是脑机接口(BCI)应用中有效的特征提取和降维的一种强大而通用的方法。然而,CSP算法也存在一些不足,特别是对噪声和离群数据比较敏感,导致分类精度较低。在本文中,我们提出了原始CSP (Corr-CSP)的正则化版本,其中目标函数被一个适当设计的惩罚项惩罚,该惩罚项鼓励两类数据之间的去相关,从而使结果目标函数仍然可以通过特征值分解直接求解。此外,我们使用了来自BCI Competition BCI数据库的三个不同的数据集来评估所提出方法的性能,并将其与原始CSP进行比较。仿真结果表明,提出的Corr-CSP方法的分类精度平均提高了4%。
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引用次数: 2
Proposal of an Analytical Model for Performance Evaluation of WR -Resolvers under Short Circuit Fault 短路故障下WR -Resolvers性能评估分析模型的提出
Pub Date : 2019-04-01 DOI: 10.1109/IranianCEE.2019.8786676
H. Lasjerdi, Z. Nasiri-Gheidari, F. Tootoonchian
Wound-Rotor (WR) resolvers are the most widely used position sensors in applications with harsh environmental conditions. However, their performance is exposed to failure due to high risk of short circuit (SC) fault. Although the output current of the resolver is negligible, its thin copper wires increases the probability of the short circuit fault. To avoid the propagation of the turn-to turn SC fault to the whole coil and undesirable performance of the motion control drive, it is necessary to diagnose it at the very beginning of its development. Meanwhile, the first step of diagnosing faults is their modeling. Time stepping finite element analysis is the most accurate, but computationally expensive method for modelling the electromagnetic devices. Therefore, it is required to establish an accurate, yet computationally fast model. In this regards, an analytical model based on d-q axes theory is proposed. Then, the success of the proposed model is validated by experimental tests on the studied sensor.
绕线转子(WR)传感器是在恶劣环境条件下应用最广泛的位置传感器。然而,由于短路(SC)故障的高风险,它们的性能处于失效状态。解析器的输出电流虽然可以忽略不计,但其细铜线增加了短路故障发生的概率。为避免匝间SC故障传播到整个线圈,影响运动控制驱动器的性能,有必要在其发展初期就对其进行诊断。同时,故障诊断的第一步是对故障进行建模。时间步进有限元分析是最精确的电磁器件建模方法,但计算代价昂贵。因此,需要建立一个准确且计算速度快的模型。为此,提出了一种基于d-q轴理论的解析模型。然后,通过对所研究传感器的实验测试,验证了该模型的有效性。
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引用次数: 6
Bipolar Resistive Switching of an Al/ZnO/Ti-based Memristor Al/ZnO/ ti基忆阻器的双极电阻开关
Pub Date : 2019-04-01 DOI: 10.1109/IranianCEE.2019.8786428
Armin Alizadeh, F. Hossein-Babaei
Devices with metal-metal oxide-metal structure have been shown to present nonlinear transport properties. Here, the A1/ZnO/Ti structure is investigated for its memristive switching behavior. The I-V measurements carried out at different voltage sweeping frequencies showed drastic changes with frequency, particularly at very low frequencies (below 1 Hz). The observations point to the importance of ionic motion in the observed switching effect. The significance of oxygen vacancies in this regards is clarified. Results suggest that the oxygen deficiency is responsible for the switching mechanism. The presented model describe the observed phenomena.
具有金属-金属氧化物-金属结构的器件具有非线性输运特性。本文研究了A1/ZnO/Ti结构的忆阻开关特性。在不同电压扫描频率下进行的I-V测量显示出频率的剧烈变化,特别是在非常低的频率下(低于1hz)。观察结果指出了离子运动在观察到的开关效应中的重要性。阐明了氧空位在这方面的意义。结果表明,缺氧是导致这种转换机制的原因。所提出的模型描述了观测到的现象。
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引用次数: 0
Forward Contract Negotiation Equilibrium in Uncongested Electricity Markets 非拥塞电力市场的远期合同谈判均衡
Pub Date : 2019-04-01 DOI: 10.1109/IranianCEE.2019.8786756
M. Banaei, M. Oloomi‐buygi
In this paper, a Nash Equilibrium model for negotiation process of forward contracts among some producers and consumers in an uncongested power system is proposed. Each market player tries to maximize his/her profit in aggregate of day-ahead electricity market and forward contracts. Uncertainty of day-ahead electricity market prices and demand of consumers in contract negotiation period are considered by some discrete scenarios which their probabilities are different based on each market players' viewpoint about the uncertain parameters in delivery period. Proposed model is applied to a test system and impacts of different parameters on the simulation results are discussed.
本文提出了非拥塞电力系统中部分生产者和消费者之间远期合约谈判过程的纳什均衡模型。每个市场参与者都试图最大化他/她在日前电力市场和远期合约中的总利润。基于各市场主体对交付期不确定性参数的看法,采用离散情景来考虑日前电力市场价格的不确定性和合同谈判期消费者需求的不确定性。将该模型应用于某试验系统,讨论了不同参数对仿真结果的影响。
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引用次数: 3
A 5-6.2GHz Variable Bandwidth Frequency Synthesizer for IEEE 802.11ac Applications 一种用于IEEE 802.11ac应用的5-6.2GHz变带宽频率合成器
Pub Date : 2019-04-01 DOI: 10.1109/IranianCEE.2019.8786591
M. Nikandish, M. Ehsanian
This paper presents a Phase Locked Loop (PLL) circuit designed for IEEE 802.11ac applications with the frequency range of 5GHz to 6.2GHz. In order to have a wide frequency range and to keep the basic parameters of the PLL constant, a control unit is required. The proposed control circuit has two calibration sections; the first part is the frequency calibration, which determines the value of the digital code in the capacitor bank of the Voltage Controlled Oscillator (VCO), and the second part is the Charge Pump (CP), which measures the amount of the VCO gain (KVCO) and consequently changes the CP current flow to provide a fixed Bandwidth (BW). The main circuit of a PLL with an integer divider are implemented in a standard 0.18µm CMOS technology. This PLL, considering the time needed for calibration, is locked up within a period of 12.5µs. Phase noise ratio has been improved to the value of 1.3dBc/Hz by using the calibration circuit. The power consumption of the systems is 13.89mW at the supply voltage of 1.8V.
本文设计了一种适用于IEEE 802.11ac频率范围为5GHz至6.2GHz的锁相环电路。为了具有较宽的频率范围并保持锁相环的基本参数恒定,需要一个控制单元。所提出的控制电路有两个校准部分;第一部分是频率校准,它确定压控振荡器(VCO)电容组中的数字代码的值,第二部分是电荷泵(CP),它测量VCO增益(KVCO)的量,从而改变CP电流以提供固定带宽(BW)。带整数分法器的锁相环主电路采用标准的0.18µm CMOS技术实现。考虑到校准所需的时间,该锁相环锁定时间为12.5µs。采用该校准电路,将相位噪声比提高到1.3dBc/Hz。供电电压为1.8V时,系统功耗为13.89mW。
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引用次数: 0
Target Localization in Distributed MIMO Radar from Time Delays, Doppler Shifts, Azimuth and Elevation Angles of Arrival 基于时延、多普勒频移、到达方位角和仰角的分布式MIMO雷达目标定位
Pub Date : 2019-04-01 DOI: 10.1109/IranianCEE.2019.8786435
A. Noroozi, Mohammad Mahdi Navebi, R. Amiri
In this paper, we focus on the moving target localization problem in a multiple-input multiple-output radar with widely separated antennas. By exploiting jointly different types of information including time delay, Doppler shift and azimuth and elevation angles of arrival, we develop an algebraic closed-form two-stage weighted least squares solution for the problem. The proposed algorithm is shown analytically to attain the CramerRao lower bound accuracy under the small Gaussian noise assumption. Numerical simulations are included to examine the algorithm's performance and corroborate the theoretical developments.
本文主要研究了天线间距较大的多输入多输出雷达的运动目标定位问题。通过联合利用时延、多普勒频移、到达方位角和仰角等不同类型的信息,给出了该问题的代数闭式两阶段加权最小二乘解。分析表明,该算法在高斯噪声小的假设下,能够达到CramerRao下界精度。数值模拟包括检验算法的性能和证实理论发展。
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引用次数: 4
Application of Adaptive Injection Gain in Sparse-Based Multispectral Image Fusion 自适应注入增益在稀疏多光谱图像融合中的应用
Pub Date : 2019-04-01 DOI: 10.1109/IranianCEE.2019.8786481
Mehdi Ghamchili, H. Ghassemian
In this paper, an adaptive procedure for determining the injection gains in a model-based pansharpening method is proposed. The fusion process is done in a patch-wise manner by adding the detail patches to the low resolution multispectral (LMS) patches. The detail patches are obtained from a sparse linear combination of the atoms (columns) of the detail dictionary which is constructed from the high-frequency information of the panchromatic (PAN) image. Therefore, the correlation coefficient between the PAN image and the ideal high resolution multispectral (HMS) image is considered as the injection gain of the details patches. To address the problem of unavailability of the ideal HMS image, an iterative algorithm is proposed which adaptively determines the injection gains. Also, the weights of constructing the intensity component, which is used to find the sparse coefficients of the detail patches, are optimally calculated using the least square error method. The simulation results of the Pleiades and GeoEye-l data demonstrate the superiority of the proposed method in comparison with the state-of-the-art methods in both visual and quantitative aspects.
在基于模型的泛锐化方法中,提出了一种确定注入增益的自适应方法。融合过程是通过在低分辨率多光谱(LMS)补丁上添加细节补丁来实现的。利用全色图像的高频信息构造细节字典,通过原子(列)的稀疏线性组合获得细节块。因此,PAN图像与理想高分辨率多光谱(HMS)图像之间的相关系数被认为是细节斑块的注入增益。针对理想HMS图像不可用的问题,提出了一种自适应确定注入增益的迭代算法。此外,利用最小二乘误差法优化计算了用于寻找细节块稀疏系数的强度分量的权重。昴星团和geoeye - 1数据的模拟结果表明,与目前最先进的方法相比,该方法在视觉和定量方面都具有优越性。
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引用次数: 1
Diffusive Molecular Communication in Partially Blocked Cylindrical Environment 部分阻断圆柱形环境中的扩散分子通信
Pub Date : 2019-04-01 DOI: 10.1109/IranianCEE.2019.8786583
Mozhdeh Doustali, Mohammad Zoofaghari, H. Arjmandi
Diffusive Molecular Communication (DMC) is considered as a promising approach to realize information exchange among nanomachines in biological environments, particularly for healthcare applications. Inspired by structure of blood vessel clogged partially by a blockage (e.g. due to atherosclerosis disease), a DMC system in a partially blocked biological cylinder is considered in this paper. Diffusive information molecules in the fluid medium are assumed to be exposed to biological receptors on the boundary, degradation reaction, and constant flow. The channel impulse response (CIR) for a point-to-point DMC system is numerically analyzed employing COMSOL Multiphysics tool as a finite-element solver. The impact of different system parameters on the CIR is examined. Our results reveal that the blockage significantly affects the CIR in the biological cylinder which may be employed by nanomachines for detection and characterization of the blockage in the blood vessels.
扩散分子通信(DMC)被认为是实现生物环境中纳米机器之间信息交换的一种有前途的方法,特别是在医疗保健应用中。受血管因阻塞(如动脉粥样硬化疾病)而部分阻塞的结构的启发,本文考虑了部分阻塞生物圆柱体中的DMC系统。假定流体介质中的扩散信息分子在边界上暴露于生物受体,发生降解反应,不断流动。采用COMSOL Multiphysics工具作为有限元求解器,对点对点DMC系统的信道脉冲响应(CIR)进行了数值分析。研究了不同系统参数对CIR的影响。我们的研究结果表明,阻塞显著影响生物圆柱体中的CIR,这可能被纳米机器用于血管阻塞的检测和表征。
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引用次数: 0
Scattering Transfer Matrix Representation for Low-loss Coupled-line Interconnects 低损耗耦合线互连的散射传输矩阵表示
Pub Date : 2019-04-01 DOI: 10.1109/IranianCEE.2019.8786521
M. Abdolhamidi, M. Mohammad‐Taheri
A compact matrix representation for low-loss multiconductor coupled-line structures in homogeneous medium based on scattering transfer matrix is presented. The compact form and straight-forward procedure of the proposed method simplifies the analysis of coupled-line circuits in general and cascaded coupled-line structures, specifically. Regardless of the coupled conductor traces, in our representation one needs only the self and mutual capacitance and inductance of traces to model the electromagnetic wave propagation along the multi-conductor transmission line structure in a very compact matrix form. Also, assuming the quasi-TEM wave propagation along the coupled-line structure, we show that the contributions of the dielectric and conductor losses are simply included in our proposed method in the form of some extra matrix multiplications.
基于散射传输矩阵,提出了均匀介质中低损耗多导体耦合线结构的紧凑矩阵表示。该方法结构紧凑,程序简单,简化了一般耦合线路电路和级联耦合线路结构的分析。不考虑耦合的导体走线,在我们的表述中,我们只需要走线的自、互电容和电感,就可以用一个非常紧凑的矩阵形式来模拟电磁波沿多导体传输线结构的传播。此外,假设准tem波沿耦合线结构传播,我们表明介电和导体损耗的贡献以一些额外矩阵乘法的形式简单地包含在我们提出的方法中。
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引用次数: 1
期刊
2019 27th Iranian Conference on Electrical Engineering (ICEE)
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