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2016 International Conference on Global Trends in Signal Processing, Information Computing and Communication (ICGTSPICC)最新文献

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Review of various control techniques for power sharing in micro grid 微电网电力共享控制技术综述
Snehal P. Vaidya, R. Somalwar, S. Kadwane
Micro grid is a latest concept for upcoming energy distribution system that enables, renewable energy integration. It generally combination of multiple distributed generations (DG's), that are usually connected to the grid through power inverters. During the islanding operation (autonomous mode) of grid, important task are to share the load demand among multiple parallel connected inverters proportionately, and maintains the voltage and frequency stabilities. There are a variety of methods implements for an accurate power sharing in a single phase system when multiple DG's are connected in parallel with utility grid through power inverters. This paper reviews various control techniques for power sharing in micro grid. The control methods are divided into two parts, which are with communication and without communication. Along with, a various control techniques are compared in terms of their respective advantages and disadvantages.
微电网是即将到来的能源分配系统的最新概念,可以实现可再生能源的整合。它通常由多个分布式代(DG)组成,通常通过逆变器连接到电网。在电网孤岛运行(自主模式)过程中,重要的任务是在多个并网逆变器之间按比例分担负荷需求,并保持电压和频率的稳定。当多个DG通过功率逆变器与公用电网并联时,在单相系统中实现准确的功率共享有多种方法。本文综述了微电网电力共享的各种控制技术。控制方法分为有通信和无通信两部分。同时,对各种控制技术的优缺点进行了比较。
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引用次数: 3
Performance analysis and comparison of BLDC motor drive using PI and FOC 基于PI和FOC的无刷直流电机驱动性能分析与比较
P. Sharma, A. S. Sindekar
BLDC motors and their drives are gaining attention day by day from various industrial and household appliance manufactures because of its high efficiency, high power density, high torque, and low inertia, less noise, compact form, almost no maintenance, salient operation, and reliability. The BLDC motor can also be thought of an intermediate between a DC motor and a synchronous motor, which extracts the advantages of each of them and rejects their disadvantages. BLDC motor is inverter fed permanent magnet synchronous motor, having permanent magnet on rotor and trapezoidal or sinusoidal shaped back EMF. The BLDC motor employs a DC supply to stator phase winding of the motor by power devices, the commutation of phase is achieved by electronics commutation system instead of brushes and commutator. Hence the rotor position at six steps needed to achieve electronics commutation perfectly. The BLDC motor emerging as the dominant new technology in motion control. The paper builds simple, accurate and fast running model of BLDC motor drive in MATLAB/Simulink. They are especially beneficial in the situation where actual system does not exist. Changing the values of parameters can often be done more quickly than by conducting a series of experimental studies on actual system. In this dissertation, Modelling, simulation and analysis of PI controller and field oriented controller (FOC) based sensor less scheme for a BLDC motor has been carried out.
无刷直流电机及其驱动器因其高效率、高功率密度、高转矩、低惯性、噪音小、结构紧凑、几乎无需维护、操作简便、可靠等优点,日益受到各种工业和家用电器制造商的关注。无刷直流电机也可以被认为是直流电机和同步电机之间的中间体,它提取了它们各自的优点,并摒弃了它们的缺点。无刷直流电机是一种变频调速永磁同步电机,转子上有永磁体,反电动势为梯形或正弦形。无刷直流电机采用电源器件向电机定子绕组提供直流电源,通过电子换相系统代替电刷和换向器实现换相。因此,转子位置在六个步骤需要实现电子换向完美。无刷直流电机正在成为运动控制领域的主导新技术。本文在MATLAB/Simulink中建立了简单、准确、快速运行的无刷直流电机驱动模型。在实际系统不存在的情况下,它们尤其有益。改变参数值往往比在实际系统上进行一系列实验研究要快得多。本文对基于PI控制器和基于场定向控制器(FOC)的无传感器无刷直流电机方案进行了建模、仿真和分析。
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引用次数: 28
Phoneme visem mapping for Marathi language using linguistic approach 基于语言学方法的马拉地语音素视觉映射
Apama Brahme, U. Bhadade
Visual speech is transcribed using visems. Visem is a set of visibly different phonemes in a language. There is high correlation between Phoneme and visem and phoneme to visem mapping is many to one because of the fact that many phonemes cannot be distinguished visually. Since each language has its own phonetic set, visem classification becomes language dependant process. Most of the phoneme visem maps available in literature are developed for English language. This paper presents phoneme visem mapping of consonants and vowels of Marathi language based on linguistic approach. This is the first attempt towards Marathi phoneme visem mapping and will be useful for visual speech recognition in Marathi language.
视觉语言是用视觉系统转录的。Visem是一种语言中一组明显不同的音素。由于许多音素无法在视觉上进行区分,音素与音素之间的映射是多对一的,因此音素与音素之间存在着高度的相关性。由于每种语言都有自己的语音集,因此语音分类成为语言依赖的过程。文献中大多数音素视觉图都是针对英语语言开发的。本文从语言学的角度对马拉地语的辅音和元音进行音素视觉映射。这是对马拉地语音素视觉映射的首次尝试,将有助于马拉地语的视觉语音识别。
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引用次数: 5
Optic disc detection using template matching based on color plane histograms 基于彩色平面直方图的模板匹配视盘检测
P. Wankhede, K. Khanchandani
In this paper, a robust and efficient histogram based template matching method for automatic detection of Optic Disc (OD) in retinal images to help ophthalmologists for diagnosis of retinal diseases is presented. Based on camera field of view (FOV) and image resolution, the OD size estimation algorithm for creation of specific size templates is proposed. Color plane histograms of OD region were used for template creation instead of complete OD image. Mean of color plane histograms of four templates were used for template matching to detect OD in retinal images. The proposed method is evaluated on retinal images of publically available DRIVE and STARE datasets. The success rate of 100% and 97.5% for DRIVE and STARE dataset respectively is achieved with proposed method. The performance comparison of results with previous methods shows that the proposed method is robust and efficient for the localization of OD in the retinal images with and without pathology.
本文提出了一种鲁棒高效的基于直方图的模板匹配方法,用于视网膜图像视盘(OD)的自动检测,以帮助眼科医生诊断视网膜疾病。基于摄像机视场和图像分辨率,提出了用于创建特定尺寸模板的外径尺寸估计算法。使用OD区域的彩色平面直方图代替完整的OD图像创建模板。利用四种模板的颜色平面直方图均值进行模板匹配,检测视网膜图像中的OD。在公开可用的DRIVE和STARE数据集的视网膜图像上对该方法进行了评估。该方法对DRIVE和STARE数据集的识别成功率分别达到100%和97.5%。与以往方法的性能比较表明,该方法对视网膜病变图像的OD定位具有鲁棒性和有效性。
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引用次数: 1
Removal of DC offset using digital mimic filtering technique 使用数字模拟滤波技术去除直流偏置
R. Kirpane, P. Bedekar
The paper describes a method which is used for removal of DC offset from fault current and can be recovered to its originality sinusoidal waveform. Basic Digital filtering approach relates with protection algorithms which are becoming more complex since the cost of computational equipment's continues to decrease in present era. The concept based on the FIR type of digital mimic filter which is described here, it is shown that, those filters which are exhibiting a none response at frequency zero on their frequency response, in which the addition of a digital mimic circuit, results in tuning to the middle of the range of time constants to be suppressed, so it will almost completely eliminate the effect of an exponentially decaying component. During fault unwanted distortions on power system network are created which could adversely affect discrimination and the reliability of protective relays. The digitalized concepts based on new modern multistate digital mimic filtering approach to minimize such kind of problems are principally concerned with this paper.
本文介绍了一种消除故障电流直流偏置并恢复其原始正弦波形的方法。基本数字滤波方法涉及的保护算法在当今时代随着计算设备成本的不断降低而变得越来越复杂。基于FIR型数字模拟滤波器的概念,在这里描述,它表明,那些滤波器在频率响应上表现出零频率无响应,其中添加数字模拟电路,导致调谐到要抑制的时间常数范围的中间,因此它将几乎完全消除指数衰减分量的影响。在故障发生时,电网会产生不良的畸变,对继电保护的判别和可靠性产生不利影响。本文主要研究了基于新型现代多态数字模拟滤波方法的数字化概念,以最大限度地减少这类问题。
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引用次数: 4
An efficient hand-off optimization based RPL routing protocol for optimal route selection in mobility enabled LLNs 一种高效的基于切换优化的RPL路由协议,用于移动lln中最优路由选择
K. Sneha, B. G. Prasad
The high pace emergence of Wireless Sensor Networks and associated communication applications have given rise to numerous advanced researches that intend to optimize overall performance and efficiency of these Low Power Lossy Networks (LLNs). The IETF proposed Routing Protocol for Low power and Lossy network (RPL) is one of the most efficient protocols; still the standard RPL doesn't support mobility function. In this paper, a mobility enabled RPL protocol has been developed using enhanced hand-off and topology aware best parent selection scheme. Our proposed scheme deals with the best route selection process to be used for mobility assisted RPL for LLNs. The novelties of the proposed scheme can be characterized in terms of its enhanced hand-off process, optimized control messages, topology aware parent selection and quality sensitive DODAG formation, best route formation, congestion avoidance, and loop avoidance. The proposed mobility based RPL has exhibited better packet delivery ratio, delay, and number of DAOs required to achieve best route selection.
无线传感器网络和相关通信应用的高速发展已经引起了许多旨在优化这些低功耗网络(lln)的整体性能和效率的先进研究。IETF提出的低功耗损耗网络路由协议(Routing Protocol for Low power and Lossy network, RPL)是最有效的协议之一;标准RPL仍然不支持移动功能。在本文中,使用增强的切换和拓扑感知的最佳父选择方案,开发了一种支持移动性的RPL协议。我们提出的方案涉及用于移动辅助RPL的最佳路线选择过程。该方案的新颖之处在于其改进的移交过程、优化的控制消息、拓扑感知的父节点选择和质量敏感的DODAG形成、最佳路由形成、拥塞避免和环路避免。提出的基于移动性的RPL显示出更好的分组交付率、延迟和实现最佳路由选择所需的dao数量。
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引用次数: 6
Efficient adaptive mean filtration technique in denoising of medical imaging 高效自适应均值滤波技术在医学图像去噪中的应用
Abhijit M. Vispute, B. Rindhe, Dipshri N. Shekokar
Medical imaging found to be interesting area for researchers & physicians for telemedicine. Such images are highly affected by noise from medical equipments like CTscan, ultrasound or MRI system. Impulse noise is mostly common type of noise interfaced with images. Denoising techniques like mean & median filtration are most used techniques to remove impulsive noise. Recently spatial adaptive masking is used to filter out high density impulse noise. This paper presents comparative results of some previously adapted mean & median filtration techniques for denoising of impulsive noise in medical images. Here we also propose a new technique in spatial adaptive masking filtration with improved PSNR of at least 2% for noise variance from 0.1 to 1. MSE values also reduced to significant level.
医学成像被发现是远程医疗研究人员和医生感兴趣的领域。此类图像受ct扫描、超声或核磁共振成像系统等医疗设备的噪声影响很大。脉冲噪声是图像中最常见的噪声类型。均值滤波和中值滤波等去噪技术是去除脉冲噪声最常用的技术。近年来,空间自适应掩蔽技术被用来滤除高密度脉冲噪声。本文介绍了几种常用的均值滤波和中值滤波技术对医学图像中脉冲噪声去噪的比较结果。本文还提出了一种新的空间自适应掩蔽滤波技术,在噪声方差从0.1到1的范围内,其PSNR至少提高了2%。MSE值也降低到显著水平。
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引用次数: 2
Content-based audio classification and retrieval: A novel approach 基于内容的音频分类与检索:一种新方法
Nilesh M. Patil, M. Nemade
The amount of audio data on public networks like Internet is increasing in huge volume daily. So to access these media, we need to efficiently index and annotate them. Due to non-stationary nature and discontinuities present in the audio signal, segmentation and classification of audio signal has really become a challenging task. Automatic music classification and annotation is also one of the challenging tasks due to the difficulty in extracting and selecting optimal audio features. Today, content-based audio retrieval systems are used in various application domains and scenarios such as music retrieval, speech recognition, and acoustic surveillance. During the development of an audio retrieval system, a major challenge is the identification of appropriate content-based features for representation of the audio signals under consideration. This paper gives the overview of various techniques used for classification and retrieval of audio and also proposes a novel approach for classification and retrieval of audio signal.
互联网等公共网络上的音频数据量每天都在以巨大的速度增长。因此,为了访问这些媒体,我们需要有效地对它们进行索引和注释。由于音频信号的非平稳性和不连续性,音频信号的分割和分类成为一项具有挑战性的任务。由于难以提取和选择最佳的音频特征,自动音乐分类和注释也是一个具有挑战性的任务之一。如今,基于内容的音频检索系统被用于各种应用领域和场景,如音乐检索、语音识别和声学监视。在音频检索系统的开发过程中,一个主要的挑战是确定适当的基于内容的特征来表示所考虑的音频信号。本文综述了各种音频分类和检索技术,并提出了一种新的音频信号分类和检索方法。
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引用次数: 7
Application of soft computing technique in power system to improve power system performance 软计算技术在电力系统中的应用,提高电力系统性能
Chetan W. Jadhao, Ankit A. Zade
Total transfer capabilities analysis of power system is currently a critical issue in both, planning & operating because of increase area interchanges among utilities. To reduce the flows in heavily loaded lines, Flexible AC Transmission System (FACTS) devices is used, this results in increased transfer capability, improve stability of the network, low system loss, and fulfill contractual required by controlling the power flows in the network. To achieve this FACTS device should place optimally and this can be done with the help of real power flow performance index sensitivity indices analysis method and reduction of total system reactive power loss sensitivity indices analysis method. Static VAR Compensator (SVC) is used here as a FACTS device. To decide priority of line for placing SVC, soft computing technique “Fuzzy logic method” is used. To write a programming code for finding out the sensitivity indices, software ‘MATLAB’ is used. Electrical IEEE-14 bus system is used for study purpose.
电力系统的总传输能力分析是当前规划和运行中的一个关键问题,因为电力系统之间的区域互通不断增加。为了减少大负荷线路的潮流,采用FACTS (Flexible AC Transmission System)设备,提高输电能力,提高电网稳定性,降低系统损耗,实现控制电网潮流的合同要求。为了实现这一目标,FACTS器件的最优放置可以借助实际潮流性能指标灵敏度指标分析法和降低系统总无功损耗灵敏度指标分析法来实现。静态无功补偿器(SVC)在这里用作FACTS器件。采用软计算技术“模糊逻辑法”确定SVC放置线的优先级。利用MATLAB软件编写了求解灵敏度指标的程序代码。电气IEEE-14总线系统用于研究目的。
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引用次数: 1
Classification and segmentation of brain tumor using Adaboost classifier Adaboost分类器对脑肿瘤的分类与分割
Ravindra Sonavane, Poonam Sonar
Abnormal or uncontrollable growth of a tissue within the brain is known as a brain tumor. The tumor detection, classification and investigate by experts is a usual technique for brain tumor classification from MRI. Explicit classification of brain MRI and interpretation of brain images organized and various techniques has been proposed. The proposed method for classification of Brain Tumor using Classifier and Neural Network uses segmentation algorithms which include Skull Striping along with morphological operation aiming that preprocessing, Anisotropic Diffusion Filtering uses for noise removal and smoothing with edge detection locating the boundaries anatomically of the image. Secondly, wavelet transforms used in the decomposition and the feature extraction of MRI and combining features of MRI images. Finally, Adaboost uses classification techniques, learn by selecting discriminative features proposed to classify MRI images into tumorous (malignant) and non-tumorous (benign). Experimental results show 100% accuracy for 155 MRI images.
脑部组织不正常或无法控制的生长被称为脑肿瘤。由专家对肿瘤进行检测、分类和调查是MRI对脑肿瘤进行分类的常用技术。脑MRI的明确分类和解释脑图像组织和各种技术已经提出。本文提出了一种基于分类器和神经网络的脑肿瘤分类方法,该方法采用分割算法,包括颅骨条纹和形态学操作,针对预处理,各向异性扩散滤波进行噪声去除和平滑,边缘检测定位图像的解剖边界。其次,将小波变换应用于MRI图像的分解和特征提取,并结合MRI图像的特征。最后,Adaboost使用分类技术,通过选择提出的判别特征来学习将MRI图像分为肿瘤(恶性)和非肿瘤(良性)。实验结果表明,155张MRI图像的准确率为100%。
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引用次数: 26
期刊
2016 International Conference on Global Trends in Signal Processing, Information Computing and Communication (ICGTSPICC)
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