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2016 2nd International Conference on Electrical, Computer & Telecommunication Engineering (ICECTE)最新文献

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Novel approach of antenna array with beam steering technology for microwave power transmission from SSPS system 基于波束导向技术的天线阵列微波功率传输新方法
S. K. Saha, M. S. Hossain
A novel approach of antenna array with beam steering technology is addressed in this paper which can transmit microwave power from Space Solar Power Satellite (SSPS) system. Array antennas are critically important component in the development of future wireless systems with applications in communications, radar and satellite technologies. The Microwave Power Transmission (MPT) technology is a key technique for SSPS system, which is being highlighted as a technology capable of solving global environment problem as well as the energy problem. This paper presents a robust technique for MPT which is able to steer the main beam at any desired direction in the presence of array imperfections. The proposed beamforming technique is proficient to cancel the directional interferences. The simulation results show that the proposed SSPS scheme has better performance than the existing systems.
提出了一种利用波束导向技术实现空间太阳能卫星系统微波功率传输的天线阵方法。阵列天线是未来无线系统发展中至关重要的组成部分,应用于通信、雷达和卫星技术。微波功率传输(MPT)技术是SSPS系统的一项关键技术,作为一项既能解决全球环境问题又能解决能源问题的技术,正受到人们的重视。本文提出了一种鲁棒的MPT技术,该技术能够在存在阵列缺陷的情况下将主波束引导到任何期望的方向。所提出的波束形成技术能够有效地消除方向干扰。仿真结果表明,该方案比现有系统具有更好的性能。
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引用次数: 2
Adaptive controller design for grid current regulation of a CSI based PV system 基于CSI的光伏系统电网电流调节自适应控制器设计
T. K. Roy, M. Pervej, F. K. Tumpa
A nonlinear adaptive controller for regulating the grid of a current source inverter (CSI) based three-phase grid-connected photovoltaic (PV) system is proposed in this paper. The proposed control structure is composed of an outer current loop which is responsible for controlling the DC-side inductor current and the inner current control loop is responsible for controlling injected current into the grid. The proposed controller is designed recursively by considering some parameters of the system parameters as unknown and these unknown parameters are estimated through the adaption laws. In order to prove the overall stability of the whole system control Lyapunov functions (CLFs) are formulated at different stages of the design process. Finally, the effectiveness of the proposed control scheme is tested on a CSI based three-phase grid-connected PV system under different atmospheric conditions. Simulation results show that the proposed control scheme can effectively meet the desired control objectives.
针对基于电流源逆变器(CSI)的三相光伏并网系统,提出了一种非线性自适应电网调节控制器。所提出的控制结构由外电流环负责控制直流侧电感电流和内电流控制环负责控制注入电网的电流组成。该控制器采用递归设计方法,考虑系统参数中的某些参数为未知,并通过自适应律对这些未知参数进行估计。为了证明整个系统控制的整体稳定性,在设计过程的不同阶段制定了李雅普诺夫函数(clf)。最后,在一个基于CSI的三相并网光伏系统上进行了不同大气条件下控制方案的有效性测试。仿真结果表明,所提出的控制方案能够有效地满足预期的控制目标。
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引用次数: 8
Smoothening of wind farm output fluctuations using new pitch controller 使用新的螺距控制器平滑风电场输出波动
A. Hasan, M. Sheikh
Recently, renewable energy sources, like wind power generation, are widely being used in the world. Among various renewable resources, wind energy seems to be promising solution to provide reliable power supply with improved system efficiency. It is essential for wind farm to control the frequency as well as power. Some methods for smoothing the wind generator output fluctuations using several types of energy storage systems have been proposed, but these methods have a cost of problem. This paper proposes a new pitch control system for smoothing the wind generator output fluctuations. The simulation results show that the wind farm output fluctuations due to the wind speed variations can be smooth more effectively by the new pitch controller than the conventional pitch controller. It is confirmed that the wind farm output gives rise to fluctuations of system frequency more as the power capacity of wind farm becomes large. The wind farm output fluctuations, as well as energy and the power system frequency can be made more accurate by using new pitch controller. PSCAD software has been used for simulation analyses.
最近,像风力发电这样的可再生能源在世界上得到了广泛的应用。在各种可再生能源中,风能似乎是一个很有前途的解决方案,可以提供可靠的电力供应,提高系统效率。对风电场来说,控制频率和功率是至关重要的。已经提出了一些利用几种类型的储能系统来平滑风力发电机输出波动的方法,但这些方法存在成本问题。本文提出了一种新的桨距控制系统,用于平滑风力发电机输出波动。仿真结果表明,与传统的螺距控制器相比,新型螺距控制器能更有效地平滑风速变化引起的风电场输出波动。研究证实,随着风电场发电容量的增大,风电场输出对系统频率的波动会越来越大。采用新的螺距控制器可以使风电场输出波动以及能量和电力系统频率更加精确。采用PSCAD软件进行仿真分析。
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引用次数: 0
Existing, emerging and future solar energy applications: A Bangladesh perspective 现有的、新兴的和未来的太阳能应用:孟加拉国的视角
Md. Ashib Rahman, Md. Rabiul Islam
This article presents the most up-to-date scenario of utilizing solar energy based applications across the country, Bangladesh. As, Bangladesh geographically situated in a region to harness solar energy most effectively, prospects and opportunities of solar energy based appliances are investigated here, along with the present energy situation of Bangladesh. Initiatives taken by Bangladesh government and non-government organizations to harness solar energy to fulfill the future energy demand of Bangladesh are also reviewed. Diverse utilization of solar energy in terms of off-grid or grid tied conditions are also presented.
本文介绍了孟加拉国全国利用太阳能应用的最新情况。由于孟加拉国在地理上处于最有效利用太阳能的地区,因此本文将研究太阳能电器的前景和机遇,以及孟加拉国目前的能源状况。还回顾了孟加拉国政府和非政府组织为利用太阳能满足孟加拉国未来能源需求而采取的举措。在离网或并网条件下,太阳能的多种利用也被提出。
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引用次数: 0
Human identification on the basis of gait analysis using Kohonen self-organizing mapping technique 基于Kohonen自组织映射技术的步态分析人体识别
Sagor Chandro Bakchy, M. Islam, Abu Sayeed
Gait recognition is one of the most recent emerging technique of human biometric which can be used for security based purposes. In comparison with other bio-metric techniques gait analysis has some special security features. Most of the biometric techniques use sequential template based component analysis for recognition. Here we have proposed a developed technique for gait identification using the feature Gait Energy Image (GEI). It is implemented using Kohonen Self-Organizing Mapping (KSOM) neural network. GEI representation of gait contains all information of each image in one complete gait cycle and requires less storage and low processing speed. As only one image is enough to store the necessary information in GEI feature, recognition process is a bit easier than any other feature of gait recognition. Gait recognition has some limitations like viewing angle variation, walking speed, clothes, carrying load etc. Robust View Transformation Model (RVTM) is used to solve the problem of viewing angle. RVTM transforms the viewing angle data from various angle to specific angle. RVTM enhances recognition performance. Our proposed method compares the recognition performance with template based feature extraction which needs to process each frame in the cycle. We use GEI which gives all possible information about all the frames in one cycle and results in better performance than other feature of gait analysis.
步态识别是近年来兴起的人体生物识别技术之一,可用于安全领域。与其他生物识别技术相比,步态分析具有一些特殊的安全特性。大多数生物识别技术使用基于序列模板的成分分析进行识别。本文提出了一种基于特征步态能量图像(GEI)的步态识别技术。该算法采用Kohonen自组织映射(KSOM)神经网络实现。步态的GEI表示包含了一张图像在一个完整的步态周期内的全部信息,存储空间小,处理速度慢。由于GEI特征只需一张图像就足以存储所需的信息,因此识别过程比其他步态识别特征都要简单一些。步态识别存在视角变化、行走速度、服装、负重等局限性。鲁棒视图转换模型(RVTM)用于解决视角问题。RVTM将视角数据从不同角度转换为特定角度。RVTM提高了识别性能。该方法与基于模板的特征提取方法的识别性能进行了比较,后者需要对周期内的每一帧进行处理。我们使用GEI在一个周期内给出所有帧的所有可能信息,结果比步态分析的其他特征更好。
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引用次数: 2
EEG biometrics based on small intra-individual and large inter-individual difference of extracted features 基于提取特征的小个体内和大个体间差异的脑电生物识别
Md Mahmudul Hasan, Md. Hanif Ali Sohag, Mohiudding Ahmad
Biometrics refers to the process of identifying an individual from others by biological means. Most of the biometric systems are unreliable, can be imitated or even can be stolen. As a result, we need to search for a new biometrics and Electroencephalogram (EEG) based biometrics is a promising field in this aspect. By using the small intra-individual and large inter-individual difference in features with different trials, individuals can be identified with more accuracy. In this paper, a methodology for identifying an individual is proposed by determining the most effective domain and features of EEG signal. Three feed forward, back propagation multi-layer neural networks were built using the most effective features. The relative comparison shows that the network designed using the features of time domain gives the worst performance whereas the network designed using the features of both time and frequency domain gives the best performance for identifying an individual having relatively lower mean square error.
生物识别是指通过生物手段将个体与其他人区分开来的过程。大多数生物识别系统是不可靠的,可以被模仿,甚至可以被盗。因此,我们需要寻找一种新的生物识别技术,而基于脑电图的生物识别技术是这方面的一个很有前途的领域。利用不同试验特征的个体内小、个体间大差异,可以更准确地识别个体。本文提出了一种通过确定脑电信号的最有效域和特征来识别个体的方法。利用最有效的特征构建了三个前馈、反向传播多层神经网络。相对比较表明,使用时域特征设计的网络识别性能最差,而同时使用时域和频域特征设计的网络识别性能最好,均方误差相对较小。
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引用次数: 11
Removing EOG artifacts from EEG signal using noise-assisted multivariate empirical mode decomposition 利用噪声辅助多元经验模态分解去除脑电信号中的眼电信号伪影
Sania Zahan
Electroencephalogram (EEG) has significant applications on medical diagnosis and Brain Computer Interfacing (BCI). But the main obstacle of analyzing EEG signal is various types of noises to get actual information. Electro-oculogram (EOG) is a vital noise in EEG signal that can be produced by eye movements. De-noising EOG from EEG signal is the key issue in this research. Many research has been done on this purpose mainly Independent Component Analysis (ICA) based EOG separation with reference signal and wavelet based EOG separation. In this research, multivariate Fractional Gaussian noise channel will be used to establish a uniformly distributed reference scale and to derive the energy based threshold to detect the low frequency trends caused by EOG artifact. Avoiding these artifacts, we can get EOG free EEG hoping better results than existing methods.
脑电图(EEG)在医学诊断和脑机接口(BCI)方面有着重要的应用。但是对脑电信号进行分析的主要障碍是各种各样的噪声,难以获得真实的信息。眼电图(EOG)是眼球运动产生的脑电信号中一个重要的噪声。脑电信号去噪是本研究的关键问题。在这方面已有很多研究,主要有基于独立分量分析(ICA)的参考信号EOG分离和基于小波的EOG分离。本研究将利用多元分数阶高斯噪声信道建立均匀分布的参考尺度,并推导基于能量的阈值来检测EOG伪影引起的低频趋势。避免了这些伪影,可以得到比现有方法更好的无EOG EEG。
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引用次数: 7
Sentiment mining from Bangla data using mutual information 利用互信息对孟加拉数据进行情感挖掘
A. Paul, P. C. Shill
Due to the explosion of social networking sites, blogs and review sites (for example, Amazon, Twitter, and Facebook, etc.) it provides an overwhelming amount of textual information. We need to organize, explore, analyze the information for making a better decision from the side of customers and companies. Thus, sentiment analysis is the best way in which it determines the author's feelings expressed in reviews as positive or negative opinions by analyzing an enormous number of documents. In this work, we used Mutual Information (MI) for the feature selection process and also used Multinomial Naive Bayes (MNB) for the classification of Bangla and English reviews. The experimental results demonstrate that the system can achieve satisfactory accuracy for Bangla dataset compare to English dataset where Bangla dataset is generated from Amazon's Watches English dataset.
由于社交网站、博客和评论网站(例如Amazon、Twitter和Facebook等)的爆炸式增长,它提供了大量的文本信息。我们需要从客户和公司的角度组织、探索、分析这些信息,以便做出更好的决策。因此,情感分析是通过分析大量的文件来确定作者在评论中表达的情感是积极的还是消极的观点的最好方法。在这项工作中,我们使用互信息(MI)进行特征选择过程,并使用多项朴素贝叶斯(MNB)对孟加拉语和英语评论进行分类。实验结果表明,该系统对孟加拉语数据集的识别精度与基于亚马逊手表英语数据集生成的英语数据集相比,取得了令人满意的效果。
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引用次数: 19
Biocompatibility analysis of a battery less back-mountable DBS device 一种无电池背装DBS装置的生物相容性分析
Senjuti Rahman, Farha Khushi, Kamal Hosain
In this paper, the biocompatibility of a battery less back-mountable deep brain stimulation (DBS) device is analyzed. To conduct the work, a circular planar inverted F antenna (PIFA) at the resonance frequency of 915 MHz is proposed. The dimension of the antenna is 20 × 19. 8904 × 1. 5mm3. In the proposed antenna, the radiating layer is meandered, and FR-4 material with εr = 4.18, tanδ = 0.02 is used as the substrate with a thickness of 1.5 mm. The bandwidth of the designed antenna is 56.71 MHz at a return loss of −10 dB in free space. Functional and biological aspects are considered here. The functional aspect includes input impedance, resonance frequency, gain pattern, radiation efficiency of the antenna, and the biological aspect involves electric field distribution, and SAR value. A complete rat model is used here. Safety regulation is verified in this paper by the specific absorption rate (SAR) distribution in tissues surrounding the back-mountable passive DBS device. The finite difference time domain (FDTD) based EM simulation software XFdtd is used to determine the electric field distributions which has an impact on the SAR value.
本文对一种无电池背装式脑深部刺激装置的生物相容性进行了分析。为此,提出了一种谐振频率为915 MHz的圆形平面倒F天线(PIFA)。天线尺寸为20 × 19。8904 × 1。5 mm3。天线的辐射层呈弯曲状,基片采用εr = 4.18, tanδ = 0.02的FR-4材料,厚度为1.5 mm。设计的天线带宽为56.71 MHz,自由空间回波损耗为−10 dB。这里考虑了功能和生物学方面。功能方面包括天线的输入阻抗、谐振频率、增益方向图、辐射效率等;生物学方面包括电场分布、SAR值等。这里使用的是一个完整的大鼠模型。本文通过背贴式无源DBS装置周围组织的比吸收率(SAR)分布验证了其安全性。利用基于时域有限差分(FDTD)的电磁仿真软件XFdtd确定对SAR值有影响的电场分布。
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引用次数: 0
Controlling of frequency fluctuation of wind turbine generator using wind speed controlled pitch controller 用风速控制螺距控制器控制风力发电机组的频率波动
A. Ferdous, M. Sheikh, Md Asaduzzaman Shobug
Due to the growing electricity concern, it is very much needed to use wind power for the generation of electricity. But for the random variation of wind speed, the output power of the wind generator fluctuates randomly as well as the fluctuation of the frequency occurs. As a result this decreases the energy. This paper represents a wind speed controlled pitch controller to control the wind generator output power fluctuation and also reduce the frequency fluctuations. For simulation analysis, real wind speed data is used and the simulation analysis have been performed by using PSCAD/EMTDC [1].
由于日益增长的电力问题,非常需要使用风力发电。但由于风速的随机变化,风力发电机的输出功率会随机波动,频率也会出现波动。结果就是能量减少了。本文提出了一种风速控制螺距控制器,既能控制风力发电机输出功率的波动,又能减小频率的波动。仿真分析采用真实风速数据,采用PSCAD/EMTDC进行了仿真分析[1]。
{"title":"Controlling of frequency fluctuation of wind turbine generator using wind speed controlled pitch controller","authors":"A. Ferdous, M. Sheikh, Md Asaduzzaman Shobug","doi":"10.1109/ICECTE.2016.7879619","DOIUrl":"https://doi.org/10.1109/ICECTE.2016.7879619","url":null,"abstract":"Due to the growing electricity concern, it is very much needed to use wind power for the generation of electricity. But for the random variation of wind speed, the output power of the wind generator fluctuates randomly as well as the fluctuation of the frequency occurs. As a result this decreases the energy. This paper represents a wind speed controlled pitch controller to control the wind generator output power fluctuation and also reduce the frequency fluctuations. For simulation analysis, real wind speed data is used and the simulation analysis have been performed by using PSCAD/EMTDC [1].","PeriodicalId":6578,"journal":{"name":"2016 2nd International Conference on Electrical, Computer & Telecommunication Engineering (ICECTE)","volume":"25 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84998342","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
期刊
2016 2nd International Conference on Electrical, Computer & Telecommunication Engineering (ICECTE)
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