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2014 International Conference on Electronics, Communication and Computational Engineering (ICECCE)最新文献

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Automated extraction of digital images features of three kinds of cotton leaf diseases 三种棉花叶病数字图像特征的自动提取
P. R. Rothe, R. Kshirsagar
The classification and identification of cotton leaf diseases is important as it can prove detrimental to the yield. The classifier needs most discriminating features to improve the effectiveness and efficiency of analysis and classification for that reason feature extraction and representation is a decisive step for pattern recognition system. In the proposed work we present a graph cut based approach for the segmentation of images of diseased cotton leaves. The testing samples of the images are captured from the fields at Central Institute of Cotton Research Nagpur, and the cotton fields in Buldhana and Wardha district. The Gaussian filter is applied to remove the noise present in the images before segmentation. The Color layout descriptor which is a very compact and resolution-invariant representation of color and can be used for a variety of similarity-based retrieval, content filtering and visualization are extracted along with shape parameters as features. The diseases that have been selected for experimentation are Bacterial Blight, Myrothecium and Alternaria.
棉花叶片病害的分类和鉴定对棉花产量有重要影响。为了提高分析和分类的有效性和效率,分类器最需要识别特征,因此特征的提取和表示是模式识别系统的决定性步骤。在提出的工作中,我们提出了一种基于图切的方法来分割患病棉花叶片的图像。图像的测试样本取自那格浦尔中央棉花研究所的田地,以及布尔达纳和瓦尔达地区的棉田。在分割前应用高斯滤波器去除图像中存在的噪声。颜色布局描述符是一种非常紧凑和分辨率不变的颜色表示,可用于各种基于相似性的检索、内容过滤和可视化,并将形状参数作为特征提取。被选择用于实验的疾病是细菌性枯萎病、霉菌病和互花菌病。
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引用次数: 25
Automated detection of diseases by nicking quantification in retinal images 通过在视网膜图像中刻痕定量来自动检测疾病
K. Parasuraman, R. Ramya
Digital retinal imaging uses high-resolution imaging systems to take pictures of the inside of your eye. This helps the doctors to access the retina and helps them to detect and manage health conditions like glaucoma, diabetes and macular degeneration. The risk of cardio vascular diseases can be identified by measuring the retinal blood vessel. The identification of the wrong blood vessel may lead to a wrong diagnosis result. A retinal image provides a good diagnostic approach of what is happening inside the human body. By analyzing the humans retinal image one can able to identify cardio vascular condition of the body. To overcome that we are using the following proposed method. This paper proposes a novel technique that collects information about all blood vessels that present in the retinal image and identifies the true vessel in a retinal image. In the proposed method, first the input image is choose and the blood vessels are segmented. From that the crossover point detection is applied to detect the vessels which are crossing each other by using the window with the neighboring pixels. Then, by applying the graph tracer method the vessels are identified and represented them in the form of subsequent vessel measurements. Then, the venular and the artery are identified and the width is calculated by measuring the arterio-venous crossings. Thus, from this the diseases is identified and the performance is calculated by comparing our proposed method with various retinal images.
数字视网膜成像使用高分辨率成像系统来拍摄眼睛内部的照片。这有助于医生进入视网膜,帮助他们检测和管理青光眼、糖尿病和黄斑变性等健康状况。心血管疾病的风险可以通过测量视网膜血管来确定。错误的血管识别可能导致错误的诊断结果。视网膜图像提供了一种很好的诊断方法来了解人体内正在发生的事情。通过分析人体视网膜图像,可以识别人体的心血管状况。为了克服这一点,我们正在使用以下建议的方法。本文提出了一种收集视网膜图像中存在的所有血管信息并识别视网膜图像中真实血管的新技术。该方法首先对输入图像进行选择,对血管进行分割;在此基础上,采用交叉点检测方法,利用相邻像素的窗口来检测相互交叉的血管。然后,通过应用图形示踪方法识别血管,并以后续血管测量的形式表示它们。然后,识别静脉和动脉,并通过测量动静脉交叉计算宽度。因此,通过将我们提出的方法与各种视网膜图像进行比较,可以识别疾病并计算性能。
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引用次数: 2
Simulation and analysis of an intelligent fuzzy logic controller model for low power photovoltaic energy utilization system 小功率光伏能源利用系统智能模糊控制器模型仿真与分析
K. Deepti, P. Srihari, Manjunadh Achari
Remote areas in India are still not connected to the power grid. But they have mobile network connectivity. The people face problems in charging their cell phones. They are forced to travel a long distances to get access to electrical outlets. The use of new efficient photovoltaic solar cells (PVSCs) has emerged as an alternative measure of renewable green power, energy conservation and demand-side management. The manufacturing of solar cells and photovoltaic arrays has advanced dramatically in recent years. But they have two inherent major problems the first is low conversion efficiency (10to16%for commercially available amorphous silicon solar cells), second is high capital cost [1]. Solar powered systems consist of different parts to be controlled separately. Since the generated power is a function of uncontrollable environmental conditions, it requires extra caution to design controllers that handle unpredictable events and maintain efficient load matching power. In this study, a photovoltaic (PV) solar array model was developed and analyzed using Matlab/Simulink. The model includes converter circuits, a controller using fuzzy logic control (FLC), and a maximum Power point (MPP) tracking control which is used to operate the PVA at its maximum power. The MPP point is tracked using four algorithms perturbation & Observation, Incremental conductance method, Constant Voltage method and Constant current method. Later a comparative performance analysis of the model for MPP algorithms is done.
印度的偏远地区仍然没有接入电网。但是他们有移动网络连接。人们面临着手机充电的问题。他们被迫走很远的路才能接通电源。新型高效光伏太阳能电池(PVSCs)的使用已成为可再生绿色电力、节能和需求侧管理的替代措施。近年来,太阳能电池和光伏阵列的制造取得了巨大的进步。但它们有两个固有的主要问题,一是转换效率低(市售非晶硅太阳能电池为10 - 16%),二是资本成本高[1]。太阳能供电系统由不同的部分组成,分别进行控制。由于产生的功率是不可控环境条件的函数,因此需要格外谨慎地设计控制器,以处理不可预测的事件并保持有效的负载匹配功率。本研究利用Matlab/Simulink开发并分析了光伏(PV)太阳能电池阵模型。该模型包括转换电路、模糊逻辑控制器(FLC)和最大功率点跟踪控制(MPP),用于使PVA在最大功率时运行。采用微扰观察法、增量电导法、恒压法和恒流法四种算法跟踪MPP点。然后对MPP算法模型进行了性能对比分析。
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引用次数: 1
A comparative and analytical study on symmetric key cryptography 对称密钥密码的比较分析研究
B. Mandal, Sourabh Chandra, S. S. Alam, S. S. Patra
Science and Technology are updating rapidly. Data are transferred through various communicative mediums. Hence always there been a major requirement of confidentiality and secure authorization of information to prevent the unauthorised access and attacks. Symmetric key cryptography is an integral part of cryptographic technique which ensures high security and confidentiality of data transmitted through the communication channel using a common key for both encryption and decryption. There are so many traditional symmetric key algorithms as well as some proposed algorithms which can provide high confidentiality along with authorized access of data. In this paper we made a comparison analysis of some of those proposed algorithms as well as the traditional algorithms of symmetric cryptography with the merits and demerits of those different types algorithm.
科学技术日新月异。数据通过各种通信媒介传输。因此,为了防止未经授权的访问和攻击,对信息的保密性和安全授权一直是一个重要的要求。对称密钥密码学是密码学技术的重要组成部分,它保证了通过通信信道传输的数据的高度安全性和保密性,使用一个通用密钥进行加密和解密。传统的对称密钥算法有很多,同时也提出了一些可以提供高保密性和授权访问数据的算法。本文将这些算法与传统的对称密码学算法进行了比较分析,并比较了这些算法的优缺点。
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引用次数: 13
Reconfigurable Solar Converter for PV battery application 用于光伏电池应用的可重构太阳能转换器
M. Nair, S. Lekshmi
A photovoltaic system is an arrangement of components designed to supply usable electric power using the sun as the power source. PV systems have many advantages like it provide clean energy, it can be made available almost anywhere there is sunlight, the operating and maintenance costs for PV panels are considered to be low. The conventionally used converters in solar systems have many disadvantages such as multiple conversion stages, complex control, less efficient, high cost, bulky, etc. A new converter, for photovoltaic battery applications, called Reconfigurable Solar Converter (RSC), uses only single-stage three phase grid-tie solar PV converter to perform dc/ac and dc/dc operations, overcomes the drawback of conventional converters. The RSC concept is based on energy storage integration for utility-scale solar PV systems and it provides a minimal overlap between the PV energy storage and energy release time. In this paper a RSC which uses minimum number of conversion stages which in turn improves the efficiency and reduces the cost, weight and volume has been realized.
光伏系统是一种组件的排列,设计用于使用太阳作为电源提供可用的电力。光伏系统有很多优点,比如它提供清洁能源,它几乎可以在任何有阳光的地方使用,光伏板的操作和维护成本被认为很低。传统的太阳能系统变流器存在转换阶段多、控制复杂、效率低、成本高、体积大等缺点。一种用于光伏电池应用的新型转换器,称为可重构太阳能转换器(RSC),仅使用单级三相并网太阳能光伏转换器进行dc/ac和dc/dc操作,克服了传统转换器的缺点。RSC概念是基于公用事业规模太阳能光伏系统的能量存储集成,它提供了光伏能量存储和能量释放时间之间最小的重叠。本文实现了用最少的转换阶段,从而提高效率,降低成本、重量和体积的RSC。
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引用次数: 7
Leakage current suppression for transformerless inverter for grid connected PV power systems 并网光伏发电系统无变压器逆变器漏电流抑制
S. Ayswarya, P. Prabhu
Due to the driving worldwide environmental demand for the renewable energy resources the photovoltaic power market in the recent years experiences certain amount of the innovations regarding the construction and the operation of the inverter connected to the grid. One such significant development, is that the abolition of the galvanic isolation due to the absence of the transformer which causes safety threats in the event of ground faults. This results in the development of the transformerless CSI inverter which experiences reduced cost, higher efficiency, smaller size and weight. But the use of the CSI injects high earth leakage current into the grid the leakage current generated between the PV panels and the ground. In order to overcome the aforementioned limitations, this paper deals with the effective solution to anticipate the CM ground leakage current using the transformerless Modified Current Source Inverter (MCSI) for grid connected photovoltaic power system. Bssy the use of Maximum Power Point Tracking(MPPT) control technique and SEPIC converter desired output from PV to the inverter is achieved. This advance topology can be modulated using Space Vector Pulse Width Modulation (SVPWM) to produce the reduced output ripple. The experimental results show the performance of the proposed solution in terms of ground leakage current reduction and the experimental studies are analyzed using MATLAB simulation.
由于世界范围内对可再生能源的环保需求的推动,近年来光伏发电市场在逆变器并网的建设和运行方面经历了一定的创新。其中一个重要的发展是,由于没有变压器而取消了在发生接地故障时造成安全威胁的电隔离。这导致了无变压器CSI逆变器的发展,其经验降低成本,更高的效率,更小的尺寸和重量。但是CSI的使用向电网中注入了很高的地漏电流,即光伏板与地之间产生的漏电流。为了克服上述局限性,本文研究了利用无变压器修正电流源逆变器(MCSI)对并网光伏发电系统进行CM地漏电流预测的有效解决方案。利用最大功率点跟踪(MPPT)控制技术和SEPIC变换器实现了从光伏到逆变器的期望输出。这种先进的拓扑结构可以使用空间矢量脉冲宽度调制(SVPWM)来产生减少的输出纹波。实验结果表明了该方案在降低地漏电流方面的性能,并利用MATLAB仿真对实验结果进行了分析。
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引用次数: 6
Comparitive analysis of different modes of operation for Zigbee mac with variation in network size and traffic Zigbee mac在不同网络规模和流量下不同运行模式的比较分析
Meenakshi Yadav, Pankti Brar, P. Kaur
In this paper we have presented a brief review of ZigBee technology, the factors that led to its development and the subsequent versions that evolved. This paper presents and briefs different modes of operation for ZigBee devices and the different layers of ZigBee with emphasis on the operation of MAC layer. The Zigbee devices can operate in either beacon or non-beacon mode. We analysed and compared throughput and energy consumption of these operational modes with respect to varying network size and number of packets transmitted.
在本文中,我们简要回顾了ZigBee技术、导致其发展的因素以及随后演变的版本。本文简要介绍了ZigBee设备的不同工作模式和ZigBee的不同层,重点介绍了MAC层的工作。Zigbee设备可以在信标或非信标模式下工作。我们根据不同的网络大小和传输的数据包数量,分析和比较了这些操作模式的吞吐量和能耗。
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引用次数: 3
A novel wavelet based thresholding for denoising fingerprint image 一种基于小波阈值的指纹图像去噪方法
K. Sasirekha, K. Thangavel
The robustness of a fingerprint authentication system depends on the quality of the fingerprint image. Denoising of the fingerprint image is indispensable to get a noise free image. In this paper, a novel method is proposed to remove Gaussian noise present in fingerprint image using Stationary Wavelet Transform (SWT), a threshold based on Golden Ratio and weighted median. First decompose the input image using SWT and apply the new modified universal threshold to the wavelet coefficients using hard and soft thresholding. Then apply Inverse Stationary Wavelet Transform (ISWT) to get the noise free image. The different kinds of wavelet filters such as db1, db2, db4, sym2, sym4, coif2 and coif4 for different noise levels are performed, among which db2 outperformed. In this study, experiments have been conducted on the fingerprint database FVC2002. The Peak Signal-to-Noise Ratio (PSNR), Signal-to-Noise Ratio (SNR), Root Mean Square Error (RMSE) and Mean Square Error (MSE) of the new modified universal threshold combined with hard thresholding is improved compared with the existing methods.
指纹认证系统的鲁棒性取决于指纹图像的质量。为了获得无噪的指纹图像,对指纹图像进行去噪是必不可少的。本文提出了一种基于黄金分割率和加权中值阈值的平稳小波变换(SWT)去除指纹图像中的高斯噪声的新方法。首先对输入图像进行SWT分解,并对小波系数分别采用硬阈值和软阈值对新修正的通用阈值进行处理。然后应用平稳小波反变换(ISWT)得到无噪声图像。对不同噪声水平下的db1、db2、db4、sym2、sym4、coif2、coif4等不同类型的小波滤波器进行了测试,其中db2的性能优于前者。本研究在指纹数据库FVC2002上进行了实验。与现有方法相比,改进的通用阈值与硬阈值相结合,在峰值信噪比(PSNR)、信噪比(SNR)、均方根误差(RMSE)和均方误差(MSE)等方面得到了改进。
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引用次数: 9
Information jamming in Electronic warfare: Operational requirements and techniques 电子战中的信息干扰:操作要求和技术
S. Vardhan, A. Garg
Information jamming in electronic warfare is a form of electronic attack where jammers radiate interfering signals toward an enemy's system, blocking the receiver with highly concentrated energy signals. The purpose of information jamming is to interfere with the enemy's effective use of the electromagnetic spectrum. This information can take the form of voice or non-voice (e.g., video or digital format) communications, command signals to control remotely located assets, data returned from remotely located equipment or the location and motion of friendly or enemy assets. Information jamming is a “soft kill” because it temporarily makes an enemy asset ineffective but does not destroy it. Information jamming can be applied from air, sea, land, and space by manned and unmanned systems, and can target communication, radar, or other services. Within the information operations construct, information jamming is an element of offensive and defensive counter information in Electronic warfare. This paper provides operational requirements and technique affecting parameters of jamming for optimal adaptation in modern warfare scenario. It also provides necessary guidelines to users particularly from defence sector to allow them to upgrade their exiting capabilities and complement future war situations more effectively with lesser human interventions.
电子战中的信息干扰是一种电子攻击形式,其中干扰机向敌方系统发射干扰信号,以高度集中的能量信号阻塞接收器。信息干扰的目的是干扰敌方对电磁频谱的有效利用。这些信息可以采取语音或非语音(例如,视频或数字格式)通信的形式、控制远程定位资产的命令信号、远程定位设备返回的数据或友方或敌方资产的位置和运动。信息干扰是一种“软杀伤”,因为它暂时使敌方资产失效,但不会摧毁它。信息干扰可以由有人和无人系统从空中、海上、陆地和空间应用,并且可以针对通信、雷达或其他服务。在信息作战体系中,信息干扰是电子战中攻防对抗信息的重要组成部分。本文提出了现代战争条件下干扰的作战要求和影响干扰参数的技术。它还为用户,特别是国防部门的用户提供了必要的指导方针,使他们能够提高现有能力,并以较少的人为干预更有效地补充未来的战争情况。
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引用次数: 7
Design of series active filter for power quality improvement 改进电能质量的串联有源滤波器的设计
K. Kumar, Ilango Karuppasamy
The voltage quality is one of the major concerns for industrial and distribution consumers. In this work, a series active filter for voltage compensation has been verified using vectorial power theory for a three-phase system with non-linear load. The simulation has been designed using MATLAB/Simulink. The control scheme provides better unbalance voltage compensation and voltage regulation for three phase system with non-linear loads which operates in different conditions. The design and simulation of series active filter performance results were presented in this paper to show effectiveness of controller.
电压质量是工业和配电用户最关心的问题之一。本文利用矢量功率理论对具有非线性负载的三相系统进行了电压补偿的串联有源滤波器的验证。利用MATLAB/Simulink进行了仿真设计。该控制方案对不同工况下运行的非线性三相系统具有较好的不平衡电压补偿和电压调节作用。通过对串联有源滤波器的设计和仿真,验证了控制器的有效性。
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引用次数: 13
期刊
2014 International Conference on Electronics, Communication and Computational Engineering (ICECCE)
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