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2013 Fourth International Conference on Computing, Communications and Networking Technologies (ICCCNT)最新文献

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Reduced order modeling of uncertain systems by pole clustering technique using genetic algorithm 利用遗传算法的极点聚类技术对不确定系统进行降阶建模
V. G. Pratheep, K. Ramesh, K. Venkatachalam
A mixed method is proposed for the order reduction of an interval system using pole clustering technique and simple mathematical manipulation process. kharitonov polynomial is employed in the interval system before the model order reduction technique is come into the approximation process. The pole clustering technique is used to obtain the reduced order denominator polynomial and the corresponding numerator polynomial is obtained through cross multiplication of transfer function polynomials. Genetic Algorithm is employed in the model order reduction process by which reduced order system parameters can be adjusted. The stability of the interval system is analyzed through the Routh-Hurwitz stability criterion.
利用极点聚类技术和简单的数学处理过程,提出了一种区间系统降阶的混合方法。在将模型降阶技术引入近似过程之前,在区间系统中采用Kharitonov多项式。采用极点聚类技术得到降阶分母多项式,通过传递函数多项式的交叉相乘得到相应的分子多项式。在模型降阶过程中采用遗传算法对降阶后的系统参数进行调整。利用Routh-Hurwitz稳定性判据分析了区间系统的稳定性。
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引用次数: 3
Performance improvement of RMSA using different substrates 使用不同基材的RMSA性能改进
Suraj Rabindranath, M. Prakash, D. Chetana, Mahesh M. Gadag
To Study the behavioral characteristics of the microstrip patch antennas with different dielectric substrates such as Glass epoxy, FR-4 and RT-Duroid. The paper gives the comparative study of Rectangular Microstrip Patch Antenna's of different dielectric substrates for design parameters like Return loss, Bandwidth, Gain, Directivity and Efficiency at 2.5GHz. Different dielectric materials have different relative permittivity and this varies the radiating capability of antennas.
研究玻璃环氧树脂、FR-4和RT-Duroid等不同介质基板微带贴片天线的行为特性。本文对不同介质基板的矩形微带贴片天线在2.5GHz时的回波损耗、带宽、增益、指向性和效率等设计参数进行了比较研究。不同的介质材料具有不同的相对介电常数,这改变了天线的辐射能力。
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引用次数: 1
Detection and tracking of moving objects by fuzzy textures 基于模糊纹理的运动物体检测与跟踪
S. M. Roomi, S. A. Karpaga
Video surveillance plays a prominent role in law enforcement, personal safety, traffic control, resource planning and security of assets, etc. The need for such systems is increasing every day, with a number of surveillance cameras deployed in public places to analyze moving objects. Automatic video surveillance system can enforce the security in the monitored area without requiring the continuous attention of human operators. For such systems, moving object detection and tracking in dynamic backgrounds such as waving trees, oceans etc... is still a challenging task. Noise in the foreground due to dynamic background condition should be removed effectively for efficient tracking of the moving objects. In this paper, objects present in dynamic backgrounds are detected using a simple and robust fuzzy texture based analysis of the video sequences. Then the detected moving object is tracked using the mean shift tracking algorithm to describe the object's direction of motion. The proposed method effectively detects the moving objects and describes the object's motion.
视频监控在执法、人身安全、交通管控、资源规划、资产保障等方面发挥着突出的作用。对这类系统的需求每天都在增加,在公共场所部署了许多监控摄像头来分析移动物体。自动视频监控系统可以在不需要操作人员持续关注的情况下加强被监控区域的安全。对于这样的系统,移动目标的检测和跟踪在动态背景,如波浪树,海洋等…仍然是一项具有挑战性的任务。为了有效地跟踪运动目标,需要有效地去除动态背景条件下前景中的噪声。在本文中,使用基于视频序列的简单鲁棒模糊纹理分析来检测动态背景中的目标。然后利用mean shift跟踪算法对检测到的运动目标进行跟踪,以描述目标的运动方向。该方法可以有效地检测运动物体并描述物体的运动。
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引用次数: 2
A 4b 40 Gbps 140 mW 2.2 mm2 0.13 μm pipelined ADC for I-UWB receiver 用于I-UWB接收机的4b 40 Gbps 140 mW 2.2 mm2 0.13 μm流水线ADC
K. Krishna, D. Srihari, D. Reena, T. Ramashri
This paper proposes a 4b 40 Gbps 140 mW 2.2 mm2 0.13 μm Pipelined ADC for Impulse-UWB receiver. The proposed Pipelined ADC uses a high speed 1-bit comparator, wide band operational amplifier, sampling circuit and a high speed buffer. The individual blocks are designed using 0.130 μm CMOS low power library cells and are designed to operate at a frequency greater than 40 Gbps sampling rate. To operate at higher frequencies, specific new design techniques/algorithms such as power-efficient, capacitor ratio-independent conversion scheme, a pipeline stage-scaling algorithm, a nested CMOS gain-boosting technique, an amplifier and comparator sharing technique, and the use of minimum channel-length, thin oxide transistors with clock bootstrapping and in-line switch techniques are adopted.
提出了一种用于脉冲超宽带接收机的4b 40 Gbps 140 mW 2.2 mm2 0.13 μm流水线ADC。所提出的流水线ADC采用高速1位比较器、宽带运算放大器、采样电路和高速缓冲器。单个模块采用0.130 μm CMOS低功耗库单元设计,设计工作频率大于40 Gbps采样率。为了在更高的频率下工作,采用了特定的新设计技术/算法,如节能,电容比例无关转换方案,流水线级缩放算法,嵌套CMOS增益提升技术,放大器和比较器共享技术,以及使用最小通道长度,具有时钟自启动和在线开关技术的薄氧化物晶体管。
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引用次数: 7
Robust detection & tracking of object by particle filter using color information 基于颜色信息的粒子滤波对目标的鲁棒检测与跟踪
Ashwani Kumar, Sudhanshu K. Mishra, Pranjna Parimita Dash
Robust visual tracking of object over extended image sequence is one of the most challenging problems in computer vision. Effective solutions to this problem are crucial for applications such as smart video surveillance, intelligent human machine interaction, machine vision and robotics. Most tracking method can be classified into two major types, namely, probabilistic filtering algorithms and deterministic localization algorithms. In this paper some improvement in color based tracking has been proposed and employed to track a moving object. The object state has been taken as the object position, speed, size, object size scale and the appearance condition of the object. The target model update condition and adaptive likelihood had been calculated to ensure the proper tracking of an object. From the simulation results it is observed that the proposed algorithm is a suitable and efficient methodology for object tracking in many challenging situations.
扩展图像序列上目标的鲁棒视觉跟踪是计算机视觉中最具挑战性的问题之一。这一问题的有效解决方案对于智能视频监控、智能人机交互、机器视觉和机器人等应用至关重要。大多数跟踪方法可以分为两大类,即概率滤波算法和确定性定位算法。本文提出了一种基于颜色跟踪的改进方法,并将其应用于运动目标的跟踪。对象状态是指对象的位置、速度、大小、对象大小比例和对象的外观状态。计算了目标模型更新条件和自适应似然,保证了目标的正确跟踪。仿真结果表明,该算法是一种适用于复杂环境下目标跟踪的有效方法。
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引用次数: 2
Evolving profligate and conspicuous web applications using reverse AJAX 使用反向AJAX开发挥霍和引人注目的web应用程序
R. Garg, Mohpreet Singh
Web based application are generally based on request - response model. AJAX is a technology where the client sends the request and the server sends the updates (response) to the client without a full page refresh. It is still a request-response model, where there is Asynchronous interaction to obtain the data asynchronously from the server by raising a request for every data required. Recent developments in AJAX have led to a new dimension called as Reverse AJAX also called as AJAX2.0 where the server sends response to the client only when there is an update in the server. This paper describes the basic concepts of Reverse AJAX, how those can concepts can be utilized and is backed up by presenting an implementation of a chat room application using Reverse AJAX.
基于Web的应用程序通常基于请求-响应模型。AJAX是一种技术,其中客户端发送请求,服务器发送更新(响应)给客户端,而不需要刷新整个页面。它仍然是一个请求-响应模型,其中存在异步交互,通过为所需的每个数据发起请求来异步地从服务器获取数据。AJAX的最新发展产生了一个新的维度,称为反向AJAX,也称为AJAX2.0,其中服务器仅在服务器中有更新时才向客户端发送响应。本文描述了反向AJAX的基本概念,以及如何使用这些概念,并通过展示一个使用反向AJAX的聊天室应用程序的实现进行了支持。
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引用次数: 0
A novel capacitive RF MEMS switch design for low voltage applications 一种新型的低电压电容式射频MEMS开关设计
Tejinder Singh, Navjot K. Khaira, J. Sengar
This paper presents a novel capacitive radio frequency Microelectromechanical systems switch on quartz substrate having stiff ribs around the membrane. Due to the need of high voltage for electrostatic actuation; buckling effect in switch membrane and stiction problem become the primary concern with RF MEMS switches and can be reduced with this proposed design approach due to the stiffness of ribs around the membrane. Lower mass of the beam and reduction in squeeze film damping is achieved due to the slots and holes in membrane that further aid in attaining high switching speeds. Two actuation electrodes are provided to increase the actuation area thus helps n achieving lower actuation voltages. This proposed switch is optimized to operate in k-band that results in high isolation of -41 dB and low insertion loss of -0.034 dB at 21 GHz with need of low actuation voltage of 9.7 V for operation of the switch.
本文提出了一种新型的电容式射频微机电系统开关,该开关在石英衬底上,膜周围有刚性肋。由于静电驱动需要高电压;开关膜的屈曲效应和粘滞问题是射频MEMS开关的主要问题,由于膜周围肋的刚度,采用这种设计方法可以减少这种问题。由于膜上的槽和孔进一步有助于实现高开关速度,因此实现了较低的梁质量和压缩膜阻尼的减少。提供两个致动电极以增加致动面积,从而有助于实现较低的致动电压。该开关被优化为在k波段工作,在21 GHz时具有-41 dB的高隔离和-0.034 dB的低插入损耗,只需9.7 V的低驱动电压即可运行。
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引用次数: 11
Efficient QR decomposition algorithm for LTE standard LTE标准的高效QR分解算法
K. Kalyani, D. Sellathambi, S. Rajaram
LTE has become a hotspot of research and application in high speed broadband wireless access. MIMO signal detecting algorithms are necessary process in LTE receiver design. One of the main baseband function in MIMO receivers is QR decomposition of the channel matrix. This paper presents a new QR decomposition algorithm with several advantages to the previous method. The execution time of the QRD algorithm reduced by designing a new algorithm based on Householder transformation (HT) instead of existing algorithm. For QRD of large size matrices, this algorithm can achieve computational efficiency with robust numerical stability. The proposed scheme reduces the computation by half the amount to previous method.
LTE已成为高速宽带无线接入领域的研究和应用热点。MIMO信号检测算法是LTE接收机设计的必要环节。MIMO接收机的主要基带功能之一是信道矩阵的QR分解。本文提出了一种新的QR分解算法,该算法与传统的QR分解算法相比具有许多优点。通过设计一种基于Householder变换(HT)的新算法来代替现有算法,缩短了QRD算法的执行时间。对于大尺寸矩阵的QRD,该算法既能提高计算效率,又具有鲁棒的数值稳定性。该方案的计算量比原方法减少了一半。
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引用次数: 2
Copy move image forgery detection using mutual information 复制移动图像伪造检测使用互信息
Somnath Chakraborty
Now a days it's going to be very much difficult to have trust on digital images. With the advancement and ready availability of image editing software, a digital image can be manipulated so elegantly that there should be no visual clues of manipulation. So it is very much necessary to detect whether a digital image is an original one or some modifications is done after snapped by camera. In this paper a new technique is proposed to detect copy-move image forgery(or region duplication forgery) based on Mutual Information of different regions of an image. No parameter tuning is required for this technique. Experimental results show that this technique is valid for detection of copy moved regions in an digital image and also quite robust to illumination variation.
有一天,要相信数码图像会变得非常困难。随着图像编辑软件的进步和可用性,数字图像可以被如此优雅地操纵,以至于不应该有操纵的视觉线索。因此,检测数码图像是原图还是经过相机拍摄后的修改是十分必要的。本文提出了一种基于图像不同区域互信息的复制-移动图像伪造(或区域复制伪造)检测方法。这种技术不需要参数调优。实验结果表明,该方法可以有效地检测数字图像中的复制移动区域,并且对光照变化具有较强的鲁棒性。
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引用次数: 9
Finite time consensus for leader following multiagent system with distributed observer design 分布式观测器设计下领导者跟随多智能体系统的有限时间一致性
V. S. Lahire, J. Chandle, V. D. Dhaigude, A. Šuste
This paper is concerned with a finite time consensus for a multi-agent system designed by distributed observer and pinning control technique without assuming that the interaction graph is connected. Distributed observers are designed for the second-order follower-agents, under the common assumption that the velocity of the active leader cannot be measured in real time. Some dynamic neighbor-based rules and protocols, consisting of distributed controllers and observers for the autonomous agents, are developed to keep updating the information of the leader. Also it is proved that each agent can follow the active leader using common Lyapunov function (CLF). Finally, a numerical example is given for illustration.
研究了在不假设交互图连通的情况下,采用分布式观测器和钉住控制技术设计的多智能体系统的有限时间一致性问题。分布式观测器是针对二阶follower-agent设计的,通常假设主动leader的速度无法实时测量。开发了一些动态的基于邻居的规则和协议,包括分布式控制器和自治代理的观察者,以保持领导者信息的更新。利用公共Lyapunov函数(CLF)证明了每个agent都能跟随主动leader。最后给出了一个数值算例。
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引用次数: 5
期刊
2013 Fourth International Conference on Computing, Communications and Networking Technologies (ICCCNT)
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