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2015 International Conference on Electrical & Electronic Engineering (ICEEE)最新文献

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Modified graphene conductivity modeling for the application of optical based plasmonic devices 改进石墨烯电导率模型在光学基等离子体器件中的应用
Pub Date : 2015-11-01 DOI: 10.1109/CEEE.2015.7428292
M. Masud Rana, Md Anwarul Quader, Minar Tishan
In this paper we have proposed modified optical conductivity model of graphene and simulated surface-plasmon polariton (SPP) mode propagation for different chemical potentials. We have approximated the critical value of chemical potentials which is responsible for (SPP) propagation in Single layer straight and double layer 90 Degree sharp bending using Finite Difference Time Domain method (FDTD) with SBC-Perfectly Matched Layer (PML) technique. The possible application of SPP for the plasmonic devices is discussed.
本文提出了石墨烯的改进光学电导率模型,并模拟了不同化学势下的表面等离子体极化子(SPP)模式传播。利用时域有限差分法(FDTD)和sbc -完美匹配层(PML)技术,近似得到了导致SPP在单层直线和双层90度急弯中传播的化学势的临界值。讨论了SPP在等离子体器件中的应用前景。
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引用次数: 0
Hybrid Fuzzy and PID controller based inverter to control speed of AC induction motor 基于模糊和PID混合控制的变频调速系统
Pub Date : 2015-11-01 DOI: 10.1109/CEEE.2015.7428237
M. Uddin, M. Rashid, A. M. Tahir, M. Parvez, Mfm Elias, Mm Sultan, Raddadi
The usage of the AC induction motor (ACIM) becomes widely increased in the industrial applications as well as domestic usage, due to the new technologies of the electronic switching technologies. The speed of the ACIM is achieved through the control of the frequency of the applied voltage to the IM, this is achieved by using the inverter, whose output frequencies lies between (20 and 60) Hz. The performance of inverter will be enhanced by adding a Hybrid Fuzzy Logic Controller and PID controller to enhance the speed controller of the ACIM. A Hybrid fuzzy logic controller (FLC) and proportional-integral derivative (PID) control of an inverter for single phase AC Induction motor is described in this paper. The output voltage error and its derivative are used as input variables for the FLC to adjust the error of the system, it will be added to the output of the PID controller to enhance the performance of the system and minimize steady state error for the speed of the motor. Microcontroller (PIC16F877A) was used to generate the pulse width modulation (PWM) and to generate internal sine wave with variable frequency to control the speed of the motor accordingly.
由于电子开关技术的发展,交流感应电动机在工业应用和家庭应用中得到了广泛的应用。ACIM的速度是通过控制施加到IM的电压的频率来实现的,这是通过使用逆变器来实现的,其输出频率在(20到60)Hz之间。通过添加混合模糊控制器和PID控制器来增强ACIM的速度控制器,从而提高逆变器的性能。本文介绍了一种基于模糊控制器和比例积分导数PID的单相交流异步电动机逆变器控制方法。将输出电压误差及其导数作为FLC的输入变量来调节系统的误差,并将其添加到PID控制器的输出中,以提高系统的性能并最小化电机转速的稳态误差。采用PIC16F877A单片机产生脉宽调制(PWM),并产生内部变频正弦波,从而控制电机的转速。
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引用次数: 9
A cross-correlation based signal processing approach to determine number and distance of objects in the sea using CHIRP signal 一种基于互相关的信号处理方法,利用CHIRP信号确定海面目标的数量和距离
Pub Date : 2015-11-01 DOI: 10.1109/CEEE.2015.7428249
Shaik Asif Hossain, Md. Shamim Anower, Amit Halder
This paper inspects a signal processing approach to determine number and distance of objects in the sea. Determining number and distance of objects in the sea are two key factors for underwater communication. Now-a-days navigation, marine experiment, fisheries, detective purposes and many other works in under water are highly dependent on this determination. However, including SONAR some conventional techniques are used in these purposes, sometimes, these techniques are complex as well as costly. Here, we try to show a statistical tool called cross-correlation technique, which is, on the other hand, a significant aspect in signal processing approach. The cross-correlation technique is used in this determination process. We transmitted CHIRP signal and used its echo effect in order to determine the number and distance of the objects in the sea. We have verified this proposed theory by a simulation from the MATLAB programming environment.
本文研究了一种确定海上目标数量和距离的信号处理方法。确定海上目标的数量和距离是水下通信的两个关键因素。如今的航海、海洋实验、渔业、侦探目的和许多其他水下工作都高度依赖于这种测定。然而,包括声纳在内的一些传统技术被用于这些目的,有时,这些技术既复杂又昂贵。在这里,我们试图展示一种称为互相关技术的统计工具,另一方面,它是信号处理方法的一个重要方面。在测定过程中采用了互相关技术。通过发射CHIRP信号,利用其回波效应来确定海面目标的数量和距离。我们在MATLAB编程环境中通过仿真验证了所提出的理论。
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引用次数: 7
Power system cascading failure path searching under multiple failures based on probability estimation 基于概率估计的电力系统多故障级联故障路径搜索
Pub Date : 2015-11-01 DOI: 10.1109/CEEE.2015.7428264
C. Liang, H. Dai, Tuo Liu, Li Ma
In the analysis of cascading failure, the multiple failures is necessary to take into account under a certain condition, and the occurrence probability and severity of multiple failures are varies with the change of operating mode caused by equipment maintenance. In this paper the event tree is used in the analysis on cascading failures and by use of probability approximation theory of rare event the probability order of multiple failures is divided, thus the screening process of multiple failures can be simplified. Applying this method to the analysis on cascading overload and from the case simulation results it can be seen that the proposed searching method can reflect the variation of failure probability caused by the change of operating mode well, and assess the risk of equipment maintenance better, thus the path searching of low-probabilistic and high-risk cascading failures can be further improved. The proposed method may be helpful for the research on cascading failures in depth.
在对级联故障进行分析时,在一定条件下需要考虑多重故障,并且多重故障的发生概率和严重程度随着设备维修引起的运行方式的改变而变化。本文将事件树用于级联故障分析,并利用罕见事件的概率近似理论划分了多个故障的概率顺序,从而简化了多个故障的筛选过程。将该方法应用于级联过载分析,从实例仿真结果可以看出,所提出的搜索方法能够较好地反映运行模式变化引起的故障概率变化,更好地评估设备维修风险,从而进一步提高低概率、高风险级联故障的路径搜索能力。该方法有助于对级联故障的深入研究。
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引用次数: 1
Design of a dispersion flattened germanium doped silica modified hexagonal photonic crystal fiber with ultra low confinement losses 色散扁平锗掺杂二氧化硅改性超低约束损耗六方光子晶体光纤设计
Pub Date : 2015-11-01 DOI: 10.1109/CEEE.2015.7428232
S. Kabir, G. Hasanuzzaman, M. Khan
This paper presents an optimum design for dispersion managed photonic crystal fibers with low confinement losses. The COMSOL multi-physics 4.2 software is used as the simulation tool. According to simulation, a five-ringed modified hexagonal photonic crystal fiber (MH-PCF) having germanium (Ge) doped silica core can be designed with a low confinement loss at 1550 nm of the order 1.026×10-14 dB/km with simultaneously nearly-zero ultra-flattened chromatic dispersion of 0 ± 0.35 ps/nm/km in a wavelength range of 1.30 to 1.65 μm as well as large effective area in a wide range of wavelengths. The fiber having a modest number of design parameters is suitable for wavelength division multiplexing (WDM) system.
提出了一种低约束损耗色散光子晶体光纤的优化设计方法。仿真工具采用COMSOL多物理场4.2软件。仿真结果表明,掺锗硅芯的五环修饰六方光子晶体光纤(MH-PCF)在1550 nm处具有1.026×10-14 dB/km量级的低约束损耗,在1.30 ~ 1.65 μm波长范围内超扁平色散接近零,为0±0.35 ps/nm/km,在宽波长范围内具有较大的有效面积。设计参数数量适中的光纤适用于波分复用(WDM)系统。
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引用次数: 4
Frequency based EMG power spectrum analysis of Salat associated muscle contraction Salat相关肌肉收缩的频率肌电功率谱分析
Pub Date : 2015-11-01 DOI: 10.1109/CEEE.2015.7428245
Farzana Khanam, Mohiudding Ahmad
Mean frequency (MNF) based EMG power spectrum analysis is presented to determine Salat associated muscle fatigue and indices. The main complexity of the parameter is a non-linear relationship between muscle fatigue and feature value, especially in large muscle and in cyclic dynamic contraction which is solved by this proposal. By this work, we can compute frequency dependent MNF for dynamic contractions and relaxations. Through Acknowledge software, FB-MNF is calculated and compared with the standard MNF. The results demonstrate that mean parameter of selected FB-MNF has a better linear relationship with muscle contraction compared to the others for different subjects. In addition, it has been observed through analysis of variance (ANOVA), compared to the traditional methods and have a significant difference (p<;0.05) between feature values among the MNF signal data of EMG power spectrum for different subjects. Furthermore, we have computed Mean Power (MNP), Total Power (TTP) and Peak Frequency (PKF) to determine both muscle load and muscle fatigue indices.
提出了基于平均频率(MNF)的肌电功率谱分析来确定Salat相关的肌肉疲劳及其指标。参数的复杂性主要是肌肉疲劳与特征值之间的非线性关系,特别是在大肌肉和循环动力收缩中,该方法解决了这一问题。通过这项工作,我们可以计算动态收缩和弛豫的频率相关MNF。通过Acknowledge软件计算FB-MNF,并与标准MNF进行比较。结果表明,在不同的实验对象中,所选择的FB-MNF平均参数与肌肉收缩的线性关系较好。此外,通过方差分析(ANOVA)观察到,与传统方法相比,不同受试者肌电功率谱的MNF信号数据的特征值之间存在显著差异(p<;0.05)。此外,我们计算了平均功率(MNP),总功率(TTP)和峰值频率(PKF)来确定肌肉负荷和肌肉疲劳指标。
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引用次数: 15
Smoothing control of wind generator output fluctuations using multiple small capacity generators 多台小容量风力发电机输出波动的平滑控制
Pub Date : 2015-11-01 DOI: 10.1109/CEEE.2015.7428258
M. Ashrafi, F. Jamaly, M. Sheikh, A. Habib
Renewable energy has to perform pivotal role in the development of present world as the globe has limited amount of fossil fuel. Wind energy is one of the prospective clean energy to provide reliable power but the intermittent nature of wind generation makes its operation and planning a major challenge to use wind as a source of power. In order to develop power system stability, it is essential for wind farm to control the frequency. In a power system different types of governor control system are used and their characteristics are also different. So, this study investigated the combined effect of different types of governor control system on the power system stability. It is examined that wind generator capacity can be increased up to 15% of the total capacity by maintaining frequency fluctuation to the acceptable limit using several number of wind generators connecting in parallel instead of similar capacity single wind generator.
由于全球化石燃料有限,可再生能源在当今世界的发展中起着举足轻重的作用。风能是未来可提供可靠电力的清洁能源之一,但风力发电的间歇性使其运行和规划成为利用风力作为电力来源的主要挑战。为了发展电力系统的稳定性,对风电场进行频率控制是必不可少的。在电力系统中,采用不同类型的调速器控制系统,其特点也各不相同。因此,本文研究了不同类型的调速器控制系统对电力系统稳定性的综合影响。研究表明,采用多台风力发电机并联而不是采用容量相近的单台风力发电机,通过将频率波动保持在可接受的范围内,风力发电机容量可增加到总容量的15%。
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引用次数: 0
SIMO-based coarse fine sensing scheme for wideband cognitive radio communication 基于simo的宽带认知无线电通信粗细感知方案
Pub Date : 2015-11-01 DOI: 10.1109/CEEE.2015.7428256
Md Tahidul Islam, Muhammad Sajjad Khan, Insoo Koo
In cognitive radio communication, energy and time consumption has a key role to ensure reliable primary user signal detection. A two stage (coarse fine) spectrum sensing has drawn well-deserved attention for wideband cognitive radio communication. In this paper, it is analyzed the required time and energy for sensing, switching and transmission for wideband channel with different practical scenario by coarse fine sensing. Moreover, we have proposed multi antenna assisted energy detection based signal detection for coarse fine sensing in the fading environment. An effective solution is developed by utilizing multiple antennas to minimize the sensing time and energy consumption while maintaining the quality of service (QoS). The proposed method improves the efficiency to obtain desired vacant band for data transmission with low energy compared with conventional system.
在认知无线电通信中,能量和时间消耗对保证主用户信号的可靠检测起着关键作用。在宽带认知无线电通信中,两阶段(粗、细)频谱感知受到了广泛的关注。本文分析了在不同的实际场景下,采用粗、细传感对宽带信道进行传感、切换和传输所需的时间和能量。此外,我们还提出了基于多天线辅助能量检测的信号检测方法,用于衰落环境下的粗、细感知。在保证服务质量(QoS)的同时,利用多天线最大限度地减少感知时间和能耗,提出了一种有效的解决方案。与传统系统相比,该方法提高了获取低能量数据传输所需空载频带的效率。
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引用次数: 0
Computational investigation of electromagnetic fields in the atmosphere due to electric and magnetic dipoles placed in seawater 海水中由电偶极子和磁偶极子引起的大气电磁场计算研究
Pub Date : 2015-11-01 DOI: 10.1109/CEEE.2015.7428255
Rakibul Islam, Rumana Binte Faruque, Manik Dautta
Electromagnetic (EM) fields at a point in space generated by electric/magnetic dipole embedded in a general anisotropic stratified media can be analytically solved [1] by decomposing the fields into transverse electric (TE) and transverse magnetic(TM) modes. The electromagnetic field strengths are dependent on the nature (electric or magnetic) of dipoles, their placement in the stratified media, and relative location of dipoles. A three-layer stratified media has been employed in this paper to model the environment consisting of air, seawater, seabed. The mathematical formulations provided by Tang [1] are used for EM field calculation containing both magnitude and phase information of Ẽ and H̃ fields for dipole antenna of 4 types namely: horizontal magnetic dipole along x- direction (HMDx), horizontal electric dipole along x- direction (HEDx), vertical magnetic dipole (VMD) and vertical electric dipole (VED). Parametric computational investigations are presented to delineate effects of i) the electric and magnetic properties of the media, ii) the nature and orientations of dipole sources, on EM fields at a specified observation point. It is observed that contributions from horizontal electric dipoles have comparable electric and magnetic field strengths at an observation point in the air.
嵌入在一般各向异性层状介质中的电/磁偶极子产生的空间点上的电磁场可以通过将电磁场分解为横向电(TE)和横向磁(TM)模式来解析求解[1]。电磁场强度取决于偶极子的性质(电或磁),它们在分层介质中的位置,以及偶极子的相对位置。本文采用三层分层介质模拟了由空气、海水、海底组成的环境。本文采用Tang[1]提供的数学公式计算偶极子天线的电磁场,其中包含了x方向水平磁偶极子(HMDx)、x方向水平电偶极子(HEDx)、垂直磁偶极子(VMD)和垂直电偶极子(VED) 4种类型的Ẽ和H]场的大小和相位信息。提出了参数计算研究来描述i)介质的电和磁特性,ii)偶极子源的性质和方向对指定观测点电磁场的影响。可以观察到,水平电偶极子的贡献在空中观测点具有相当的电场和磁场强度。
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引用次数: 5
Application of microarray-core based modified photonic crystal fiber in chemical sensing 基于微阵列核的改性光子晶体光纤在化学传感中的应用
Pub Date : 2015-11-01 DOI: 10.1109/CEEE.2015.7428286
S. Asaduzzaman, K. Ahmed, Md. Faizul Huq Arif, M. Morshed
This study presents a simple type of modified PCF (M-PCF) as a chemical sensor where both core and cladding are micro-structured. Different guiding properties of proposed M-PCF have been investigated for a wide range of wavelength using full vectorial finite element method (FEM). By varying pitch and hole diameter both of inner and outer layers, the relative sensitivity, refractive index and confinement loss are numerically examined and compared. At the wavelength 1.33μm it is observed that the relative sensitivity is improved 1.45 times and confinement loss is also reduced than prior work. Fabrication process and cost will be low of proposed M-PCF because of its structural simplicity.
本研究提出了一种简单的改性PCF (M-PCF)作为化学传感器,其核心和包层都是微结构的。利用全矢量有限元法研究了M-PCF在大波长范围内的不同导频特性。通过改变内层和外层的节距和孔径,对相对灵敏度、折射率和约束损耗进行了数值计算和比较。在波长1.33μm处,相对灵敏度提高了1.45倍,约束损耗也减小了。该材料结构简单,具有较低的制造工艺和成本。
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引用次数: 19
期刊
2015 International Conference on Electrical & Electronic Engineering (ICEEE)
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