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2015 International Conference on Signal Processing and Communication Engineering Systems最新文献

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Effect of thinning extent on ASL number recognition using open-finger distance feature measurement technique 稀疏程度对开指距离特征测量技术的ASL数字识别的影响
A. Thalange, S. Dixit
In recent years, much of the research is done in using computers to recognize sign language. Computer recognition of sign language is an important research problem for enabling communication with hearing impaired people without the help of interpreter. In this article we propose a method to detect the static image based number of American Sign Language (ASL). This method is based on counting the open fingers in the static images and extracting the feature vector based on the successive distance between the adjacent open fingers. Further neural network is used for the classification of these numbers. This method is qualified to provide an average recognition rate of 92 percent.
近年来,很多研究都是用计算机来识别手语。手语的计算机识别是一个重要的研究问题,可以使听力受损的人在没有翻译的帮助下进行交流。本文提出了一种基于静态图像的美国手语数量检测方法。该方法基于对静态图像中张开的手指进行计数,并根据相邻张开手指之间的连续距离提取特征向量。进一步使用神经网络对这些数字进行分类。该方法的平均识别率为92%。
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引用次数: 4
Improved two stage ultra-wideband CMOS low noise amplifier with out band rejection using low noise active inductor 利用低噪声有源电感改进了带外抑制的两级超宽带CMOS低噪声放大器
M. Malek, Suman Saini
A two stage 3.2-6.3 GHz Ultra Wide-Band CMOS Low Noise Amplifier with out-band rejection topology by using modified low noise Active Inductor with 0.18μm CMOS technology is presented in this paper. Due to the Federal communication commission's power limitation on the transmitting signal at transmitter, the receiver signal power of the UWB system is very smaller than interferer narrow-band signals. To avoid this interference and to get the original received signal at receiver side the characteristic of interference rejection must be at receiver. As the low noise amplifier is very first stage of the receiver, here in this paper we proposed a wide-band input network with out-band rejection capability to suppress the out-band properties as its first stage of LNA. Source degenerated cascode Amplifier is used as the amplifier stage of LNA. To attenuate more the out-band rejection characteristic without influencing the input matching, a dual band Notch filter with the low noise Active Inductor is used as the second stage. An Active Inductor circuit has been designed to modify with respect to improve its Quality factor as well as to reduce its noise, as comparatively an Active Inductor has lowered the noise performance than the Passive Inductors. There is maximum 75-85 dB out-band rejection has been measure with the power gain of almost 15dB and 0.9 nV/sqrt(Hz) the minimum power spectral density has been measured while consuming a DC power of 4.7mW.
提出了一种采用0.18μm CMOS技术改进的低噪声有源电感,具有带外抑制拓扑结构的两级3.2 ~ 6.3 GHz超宽带CMOS低噪声放大器。由于美国联邦通信委员会对发射机发射信号的功率限制,UWB系统的接收信号功率比干扰窄带信号要小得多。为了避免这种干扰,在接收端得到原始的接收信号,必须在接收端具有抗干扰特性。由于低噪声放大器是接收机的第一级,本文提出了一种具有带外抑制能力的宽带输入网络作为LNA的第一级,以抑制带外特性。采用源退化级联放大器作为LNA的放大级。为了在不影响输入匹配的情况下进一步衰减带外抑制特性,采用带低噪声有源电感的双带陷波滤波器作为第二级。由于有源电感器比无源电感器具有更低的噪声性能,因此设计了有源电感器电路,以改进其质量因子并降低其噪声。最大75-85 dB带外抑制已被测量,功率增益近15dB, 0.9 nV/sqrt(Hz),最小功率谱密度已被测量,同时消耗直流功率为4.7mW。
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引用次数: 9
K enhancement of low contrast images using fuzzy techniques 使用模糊技术对低对比度图像进行K增强
G. Sudhavani, M. Srilakshmi, S. Sravani, P. Rao
Most of images like medical images, satellite images and even real life photographs may suffer from poor contrast due to the inadequate or insufficient lighting during image acquiring. So there is a necessity of contrast enhancement of images. In this paper three enhancement techniques namely fuzzy rule based contrast enhancement, contrast enhancement using intensification (INT) operator, and contrast enhancement using fuzzy expected value (FEV) are presented for the low contrast grayscale images. Comparative analysis of these enhancement techniques is carried out by means of index of fuzziness (IOF) and processing time.
大多数图像,如医学图像、卫星图像甚至现实生活中的照片,可能会因为图像获取过程中照明不足或不足而导致对比度差。因此,有必要对图像进行对比度增强。针对低对比度灰度图像,提出了基于模糊规则的对比度增强、基于增强算子的对比度增强和基于模糊期望值的对比度增强三种增强技术。利用模糊度指数(IOF)和处理时间对这些增强技术进行对比分析。
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引用次数: 10
Delta differential One-way ranging (DDOR) transmitter onboard Mars Orbiter Mission (MOM) 火星轨道飞行器(MOM)机载Delta差分单向测距(DDOR)发射机
C. Ramamurthy, Rahul Karkara, Deepali C. Vaishya, R. Jolie
Delta Differential One-way ranging (DDOR) is an interferometer technique used in deep space missions to calculate the angular position of a satellite with reference to a well known source which is usually a quasar. A Transmitter has been used in Mars Orbiter Mission (MOM) for DDOR measurement to improve the accuracy of orbit determined by other techniques. The Transmitter operates at S-band with carrier phase modulated by a single tone at around 4 MHz approximately. This paper discusses the principle of DDOR measurement, how the specifications for the Transmitter were arrived at, the design & realization using the available components and its on-orbit performance.
Delta差分单向测距(DDOR)是一种用于深空任务的干涉仪技术,用于根据已知的源(通常是类星体)计算卫星的角位置。在火星轨道飞行器任务(MOM)中,利用发射机进行DDOR测量,以提高其他技术确定轨道的精度。发射机工作在s波段,载波相位由单音调制,大约在4mhz左右。本文讨论了DDOR测量的原理、发射机规格的确定、利用现有元器件的设计与实现及其在轨性能。
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引用次数: 2
Comparative study of different feeding mechanisms on thermally stable resonator antenna 热稳定谐振器天线不同馈入机制的比较研究
K. Mohit, V. Gupta, S. K. Rout
This paper presents the comparison of the features of three dissimilar feeding methods namely co-axial probe, microstrip line and co-planer feeding for a thermally stable resonator antenna (TSRA). First, nanoparticles have been developed by using proper synthesis process and then mixed in accordance with their temperature coefficients such as to achieve thermal stability. The Nicholson-Ross-Weir conversion method has been used for the determination of microwave dielectric constant (εr) and permeability (μr). Further, a thermal stable cuboid shaped resonator antenna was developed by using this composition. Three different feeding techniques are used and their corresponding resultant characteristics are compared for this developed antenna.
本文比较了热稳定谐振腔天线(TSRA)的同轴探针馈电、微带线馈电和共平面馈电三种馈电方式的特点。首先,采用适当的合成工艺制备纳米颗粒,然后根据其温度系数等进行混合,以达到热稳定性。采用Nicholson-Ross-Weir转换法测定了微波介电常数εr和磁导率μr。进一步,利用该组合物研制了热稳定长方体谐振器天线。采用了三种不同的馈电技术,并对其相应的特性进行了比较。
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引用次数: 1
An efficient interference aware channel allocation algorithm for Wireless Mesh Networks 一种有效的无线Mesh网络干扰感知信道分配算法
K. Subbaiah, M. Naidu
Wireless Mesh Networks (WMNs) is an emerging and latest technology that is used to develop the new attractive applications for wireless network users. WMNs provide a good platform for many researchers to develop new innovative procedures and methods to improve the network performance in wireless enterprise backbone networks. WMNs have unique features like ease of deployment at low cost. By adding multiple radios and multiple channels, it is possible to improve the network capacity and throughput. Due to the scarcity of non-overlapped frequency channels and available radios per node, the interference is still present, which limits the bandwidth available on network links and eventually degrades the achievable throughput. As interference depends on how channels are bound to radio interfaces, a proper channel assignment scheme is needed to reduce the interference. The Interference Minimization is one of the major problems in Multi Radio and Multi-channel WMNs. In this paper, we propose a BFS-Maximum Neighbor Index based Channel Assignment (BFS-MaxNICA) algorithm to improve the overall network performance by decreasing the interference degree. The simulation results show that proposed scheme outperforms the earlier approaches like Clique and CCA (Centralized channel Assignment) Algorithms.
无线网状网络(WMNs)是一种新兴的、最新的技术,用于开发对无线网络用户具有吸引力的新应用。WMNs为许多研究人员提供了一个良好的平台,可以开发新的创新程序和方法来提高无线企业骨干网的网络性能。wmn具有独特的特性,如易于部署和低成本。通过增加多个无线电和多个信道,可以提高网络容量和吞吐量。由于每个节点的非重叠频率通道和可用无线电的稀缺性,干扰仍然存在,这限制了网络链路上的可用带宽,最终降低了可实现的吞吐量。由于干扰取决于信道与无线电接口的绑定方式,因此需要适当的信道分配方案来减少干扰。干扰最小化是多无线电和多信道WMNs的主要问题之一。本文提出了一种基于bfs -最大邻居索引的信道分配(BFS-MaxNICA)算法,通过降低干扰程度来提高网络的整体性能。仿真结果表明,该方案优于以往的Clique和CCA(集中式信道分配)算法。
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引用次数: 11
Testing and evaluation of glass fiber reinforced polymers by thermal wave imaging 玻璃纤维增强聚合物的热波成像测试与评价
G. Dua, G. Subbarao, Ravibabu Mulaveesala
Glass Fiber Reinforced Polymer (GFRP) composites are being used in wide range of applications since these materials are less affected by environmental and atmospheric conditions in addition to its high strength to weight ratio. However, there are still some concerns about reinforced polymers due to their manufacturing imperfection or imperfections during their in-service, such as the presence of surface and sub-surface defects which effect their performance. InfraRed Thermography (IRT) shows its potential usage for non-destructive testing and evaluation (NDT&E) due to its intrinsic testing capabilities such as remote, whole field, quantitative and qualitative to detect surface and sub-surface defects. This present work highlights a spectral reshaping by introducing a Gaussian window on the captured thermal profile in a frequency modulated thermal wave imaging and named as Gaussian Windowed Frequency Modulated Thermal Wave Imaging (GWFMTWI) technique. Further various multi-transform techniques (time and frequency domain based) have been introduced in order to test sub-surface defect detection capabilities in chosen GFRP sample. Comparison has been made with the non-stationary linear frequency modulated thermal wave imaging technique in terms of depth scanning capability. Results obtained from the GWFMTWI clearly shows better detection potential with improved test resolution and sensitivity.
玻璃纤维增强聚合物(GFRP)复合材料被广泛应用,因为这些材料受环境和大气条件的影响较小,而且具有高强度重量比。然而,由于增强聚合物的制造缺陷或在使用过程中存在缺陷,例如存在影响其性能的表面和次表面缺陷,因此仍然存在一些问题。红外热像仪(IRT)由于其内在的远程、全场、定量和定性检测表面和亚表面缺陷的能力,在无损检测和评估(NDT&E)中显示出潜在的应用前景。本研究通过在调频热波成像中捕获的热剖面上引入高斯窗口来进行光谱重塑,并将其命名为高斯窗口调频热波成像(GWFMTWI)技术。进一步介绍了各种多变换技术(基于时域和频域),以测试选定GFRP样品的亚表面缺陷检测能力。并与非平稳线性调频热波成像技术在深度扫描能力方面进行了比较。结果表明,GWFMTWI具有更好的检测潜力,提高了测试分辨率和灵敏度。
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引用次数: 1
Simulation of collision avoidance by navigation assistance using stereo vision 基于立体视觉的导航辅助避碰仿真
S. A. Magrabi
In the research study the fully automated vehicles is one of the most important factor to navigate the vehicle by avoiding obstacles and to maintain specific path. The methodologies to achieve this could be researched on robots which rely on their ability to sense and interact. Laser sensors and Ultra-sonic sound sensors have been a traditional way to detect objects in the recent past but they were not efficient at close range. By using stereo vision it is possible to detect objects and their distances just like how we humans detect object and their relative distances with the eyes. The objective of the project is to develop a system where it imports data a stereo vision camera, understand the nature of the environment and to choose the right direction to get an appropriate speed for a robot to navigate.
在研究中,自动驾驶汽车避开障碍物并保持特定的路径是最重要的因素之一。实现这一目标的方法可以在机器人上进行研究,这些机器人依赖于它们的感知和互动能力。近年来,激光传感器和超声波传感器一直是探测物体的传统方法,但它们在近距离探测时效率不高。通过使用立体视觉,就像我们人类用眼睛检测物体和它们的相对距离一样,可以检测物体和它们的距离。该项目的目标是开发一个系统,该系统可以从立体视觉相机中导入数据,了解环境的性质,并选择正确的方向,以获得机器人导航的适当速度。
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引用次数: 1
Performance analysis of network monitoring tool through automated software engineering approach 利用自动化软件工程方法对网络监控工具进行性能分析
M. Debbarma, N. Debbarma, D. Deb, Parthasarathi De
In this paper, we developed an application that can be used to monitor network packets, bandwidth, Protocol Packets from the network and easily can monitor the system networking performance. The system uses automated software engineering approach, especially unit test in Java. The system can be used for monitoring the TCP, UDP, ARP, packets, when the system is connected with the internet. Domain IP address can be detected and packet that is lost can also be measured. The packet is captured with JPcap and WinPcap tool, integrated in JVM. Testing of this software involves developing set of test cases that are similar to the real data that the NMT is intended to manipulate. This project is a prototype of software engineering methodology and software is successfully tested.
在本文中,我们开发了一个应用程序,可以用来监控网络数据包,带宽,协议数据包从网络,可以方便地监控系统的网络性能。系统采用自动化的软件工程方法,特别是在Java中进行单元测试。当系统与internet连接时,可以对TCP、UDP、ARP、数据包进行监控。可以检测域IP地址,也可以测量丢失的数据包。数据包是用JPcap和WinPcap工具捕获的,集成在JVM中。该软件的测试包括开发一组测试用例,这些用例与NMT要处理的真实数据相似。该项目是软件工程方法论的一个原型,软件已成功测试。
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引用次数: 0
Self driven pass-transistor based low-power pulse triggered flip-flop design 基于自驱动通型晶体管的低功耗脉冲触发触发器设计
O. Anjaneyulu, A. Veena, C. Shravan, C. V. K. Reddy
In this paper, self driven pass-transistor based low-power pulse triggered flip-flop design is conferred. In this configuration, the creation of clock pulse is implemented with pass transistor based two input AND gate for reducing the discharging path and improve the speed, reduce the circuit complexity. In the proposed design input to output driving path inverter is deleted and the transistor is substituted with pass transistor logic. The pass transistor driven by generated clock pulse is utilized to drive the flip flop output. As compared to the conventional pulse triggered flip-flop, the proposed pulse triggered flip-flop design features are best speed, power and Power-Delay-Product (PDP) performance. It's maximum power saving against conventional pulse triggered flip-flop designs such as D?DCO, MHLFF, SCCER, CPE-PFF is up to 99.69%, 99.43%, 95.09% 84.14% respectively at 100 MHZ input data rate. The proposed design is generated by using TSPICE CMOS 180nm process technology.
本文提出了一种基于自驱动通型晶体管的低功耗脉冲触发触发器设计方法。在该配置中,时钟脉冲的产生采用基于通型晶体管的双输入与门实现,减少了放电路径,提高了速度,降低了电路的复杂度。在该设计中,消除了输出驱动路径逆变器的输入,用通管逻辑代替了晶体管。由产生的时钟脉冲驱动的通管驱动触发器输出。与传统的脉冲触发触发器相比,所提出的脉冲触发触发器设计具有最佳的速度、功率和功率延迟积(PDP)性能。与传统的脉冲触发触发器设计(如D?在100 MHZ输入速率下,DCO、MHLFF、SCCER、CPE-PFF分别达到99.69%、99.43%、95.09%和84.14%。本设计采用TSPICE CMOS 180nm工艺技术生成。
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引用次数: 3
期刊
2015 International Conference on Signal Processing and Communication Engineering Systems
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