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2016 7th International Conference on Sciences of Electronics, Technologies of Information and Telecommunications (SETIT)最新文献

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1×2 Equilateral Triangular Dielectric Resonator Nantenna array for optical communication 1×2用于光通信的等边三角形介质谐振器纳米天线阵列
W. T. Sethi, H. Vettikalladi, H. Fathallah, M. Himdi
In this paper, we explore the potential benefits of designing a dielectric resonator nantenna shaped in an equilateral triangular manner which is fed via a 1×2 corporate feed network. Utilizing full wave electromagnetic simulation software CST MWS, we demonstrated our proposed nantenna to work as a transceiver at optical C-band (1.55 µm) having a center frequency of 193.5 THz. Numerical results demonstrate that the proposed nantenna exhibits an end-fire directional radiation pattern of 9.57 dB with a wide impedance bandwidth of 2.58 % (189 THz – 194 THz) covering the standard optical C-band transmission window. The proposed nantenna can be a viable candidate for applications used in nanophotonics, inter and intra network optical wireless communication devices, optical sensing and optical energy harvesting etc.
在本文中,我们探讨了设计一种通过1×2公司馈电网络馈电的等边三角形介质谐振器纳米天线的潜在好处。利用全波电磁仿真软件CST MWS,我们演示了我们提出的纳米天线作为光c波段(1.55 μ m)的收发器,中心频率为193.5太赫兹。数值结果表明,该天线具有9.57 dB的射端定向辐射方向图,阻抗带宽为2.58% (189 THz ~ 194 THz),覆盖了标准光学c波段传输窗口。所提出的纳米天线可以应用于纳米光子学、网络间和网络内光通信设备、光传感和光能量收集等领域。
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引用次数: 0
A comprehensive leap motion database for hand gesture recognition 一个全面的跳跃运动数据库的手势识别
S. Ameur, Anouar Ben Khalifa, M. Bouhlel
The touchless interaction has received considerable attention in recent years with benefit of removing the burden of physical contact. The recent introduction of novel acquisition devices, like the leap motion controller, allows obtaining a very informative description of the hand pose and motion that can be exploited for accurate gesture recognition. In this work, we present an interactive application with gestural hand control using leap motion for medical visualization, focusing on the satisfaction of the user as an important component in the composition of a new specific database. In this paper, we propose a 3D dynamic gesture recognition approach explicitly targeted to leap motion data. Spatial feature descriptors based on the positions of fingertips and palm center are extracted and fed into a support vector machine classifier in order to recognize the performed gestures. The experimental results show the effectiveness of the suggested approach in the recognition of the modeled gestures with a high accuracy rate of about 81%.
近年来,由于消除了身体接触的负担,非接触式交互受到了广泛的关注。最近引入的新型采集设备,如跳跃运动控制器,可以获得非常翔实的手部姿势和运动描述,可以用于准确的手势识别。在这项工作中,我们提出了一个使用跳跃运动进行手势控制的交互式应用程序,用于医学可视化,重点是将用户满意度作为组成新特定数据库的重要组成部分。本文提出了一种明确针对跳跃运动数据的三维动态手势识别方法。提取基于指尖和手掌中心位置的空间特征描述符,并将其输入到支持向量机分类器中以识别所执行的手势。实验结果表明,该方法对模拟手势的识别是有效的,准确率达到81%左右。
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引用次数: 2
Gesture recognition system and finger tracking with kinect: Steps 手势识别系统和kinect手指跟踪:步骤
Kawther Smari, M. Bouhlel
The automatic interpretation of human gestures based on the kinect sensor offers new opportunities for human-computer interaction (HCI) more natural and intuitive than conventional devices. Thus, Finger and hand gesture detection constitutes an active research axis because certain situations demand silenced conversation. In fact, visual explanation of hand movements and finger detection can be helpful to achieve the easiness preferred for HCI. It is a famed method to communicate with machines and it has been developed in many applications. In this paper we present a view of the current research. We will start by defining certain number of terms then by interpreting the main steps of system recognition gesture and fingertips tracking.
基于kinect传感器的人类手势自动解释为人机交互(HCI)提供了比传统设备更自然和直观的新机会。因此,手指和手势检测构成了一个积极的研究轴,因为某些情况需要沉默的对话。事实上,手部动作的视觉解释和手指检测可以帮助实现HCI首选的简单性。它是一种著名的与机器通信的方法,并在许多应用中得到了发展。本文对目前的研究现状进行了综述。我们将从定义一定数量的术语开始,然后解释系统识别手势和指尖跟踪的主要步骤。
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引用次数: 1
A new efficient energy implementation of K-RLE algorithm for WSN 基于K-RLE算法的无线传感器网络节能新实现
Marwen Roukhami, Younes Lahbib, A. Mami
Energy consumption is a critical issue affecting the lifetime of WSN. It is observed that energy consumed for processing the data to transmit is considerably less than used in transmission. A number of techniques are proposed to solve this problem. Data compression is a promising approach to reduce transmitted data and inter-nodes communications over wireless channels. In this paper, we present a new approach to implement the K-RLE algorithm in WSN giving a trade-off between energy consumption and compression rate efficiency. Our solution called C-RLE is validated and qualified on a Cortex-M3 based WSN node and compared to the previous implementations of K-RLE. Experimental results show that proposed implementation preserves the performance of the K-RLE in terms of compression ratio. Moreover, it significantly performs better than the existing implementations of K-RLE in terms of energy consumption with a gain of 30.41%.
能量消耗是影响无线传感器网络寿命的关键问题。可以观察到,用于处理要传输的数据所消耗的能量比用于传输的能量要少得多。提出了许多技术来解决这个问题。数据压缩是减少无线信道上传输数据和节点间通信的一种很有前途的方法。在本文中,我们提出了一种在WSN中实现K-RLE算法的新方法,在能量消耗和压缩率效率之间进行权衡。我们的解决方案C-RLE在基于Cortex-M3的WSN节点上进行了验证和验证,并与之前的K-RLE实现进行了比较。实验结果表明,该方法在压缩比方面保持了K-RLE的性能。此外,在能耗方面,它明显优于现有的K-RLE实现,提高了30.41%。
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引用次数: 2
Proposed unified 32-bit multiplier/inverter for asymmetric cryptography 针对非对称密码提出了统一的32位乘法器/逆变器
Anissa Sghaier, M. Zeghid, Chiraz Massoud, Mohsen Machhout
Arithmetic in GF(2n) finite fields in asymmetric cryptography is the key of an efficient cryptosystems implementation. Thus, cryptosystems based on algebraic curves such as Hyper/Elliptic curves (ECC,HECC) and Pairings need a big number of arithmetic operations. They required several GF(2n) inversions and multiplications which are the most time and area consuming operations. This paper describes a hardware architecture for computing both modular multiplication and modular inversion in GF(2n) finite fields, based on a Modified Serial Multiplication/Inversion (MSMI) algorithm. The algorithm is suitable for both hardware implementations and software implementations. The proposed design performs 8-bits, 16-bits, 32-bits or 64-bits modular multiplication or inversion. Our design was modeled using VHDL and implemented in the Xilinx FPGAs Virtex6. Implementation results prove that our MSMI uses only 219 FPGA slices, it achieves a maximum frequency of 150 MHz and it computes 163-bits modular multiplication in 4.21 µ secs.
非对称密码系统中GF(2n)有限域的算法是有效实现密码系统的关键。因此,基于超/椭圆曲线(ECC,HECC)和对等代数曲线的密码系统需要大量的算术运算。它们需要几个GF(2n)反转和乘法,这是最耗时和最消耗面积的操作。本文描述了一种基于改进串行乘法/反演(MSMI)算法在GF(2n)有限域中计算模乘法和模反演的硬件结构。该算法既适用于硬件实现,也适用于软件实现。所提出的设计执行8位,16位,32位或64位模块化乘法或反转。我们的设计使用VHDL建模,并在Xilinx fpga Virtex6中实现。实现结果证明,我们的MSMI仅使用219个FPGA片,最大频率达到150 MHz,并在4.21µs内计算163位模块化乘法。
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引用次数: 0
New image compression method using logarithmic quantization 采用对数量化的图像压缩新方法
M. Rahali, H. Loukil, M. Bouhlel
The compression methods of images based on neural network and wavelet transform gives a limitation in the compression ratio and the reconstructed image quality. To improve the compression ratio without quality degradation of the reconstructed image, we add a phase of pretreatment before the discrete wavelet transform uses the principle of Weber-Fechner law which says that the sensation of the human eye to light is logarithmic. We quantify the image by using the Weber-Fechner law to reduce the entropy of the image before the compression.
基于神经网络和小波变换的图像压缩方法在压缩比和重构图像质量方面存在局限性。为了在不降低重建图像质量的前提下提高压缩比,我们在离散小波变换前增加了一段预处理,该预处理利用了人眼对光的感觉是对数的Weber-Fechner定律原理。我们利用韦伯-费希纳定律对图像进行量化,以减少压缩前图像的熵。
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引用次数: 0
A cholesterol lesion detection approach based on SVD decomposition 基于SVD分解的胆固醇病变检测方法
Sana Lafi, A. Khalfallah, M. Bouhlel
Fluorescence spectroscopy based on immuno-fluorescence is a useful tool in medical diagnosis and screening for different pathologies, as breast cancer, atherosclerosis … Such a diagnosis, often achieved through a fluorescent labeling, is often obscured by a parasite signal associated mainly with some cells which are naturally auto-fluorescent. This paper proposes a computational method based on Singular Value decomposition which helps analyze the main components of an emitted fluorescent signal by a labeled artery. The aim of this analysis is to extract the pure spectra associated with the fluorescent sources and their relative repartition in order to detect and localize the cholesterol lesion. Computer simulations are presented to illustrate the efficiency of the proposed method in dealing with overlapped source problem in a labeled artery.
基于免疫荧光的荧光光谱是医学诊断和筛查不同病理的有用工具,如乳腺癌、动脉粥样硬化……这种诊断通常通过荧光标记来实现,通常被主要与一些自然自动荧光的细胞相关的寄生虫信号所掩盖。本文提出了一种基于奇异值分解的计算方法,用于分析标记动脉发出的荧光信号的主要成分。本分析的目的是提取与荧光源相关的纯光谱及其相对重分配,以便检测和定位胆固醇病变。计算机仿真表明了该方法在处理标记动脉中重叠源问题方面的有效性。
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引用次数: 2
Comparative study between single-phase transformerless PV inverters in terms of conducted EMI 单相无变压器光伏逆变器传导电磁干扰的比较研究
S. Kraiem, M. Hamouda, J. Slama
Recently there has been an increasing interest in transformerless photovoltaic (PV) inverters because of their salient benefits such as lower cost, smaller volume as well as higher efficiency as compared to those with transformer. However, a higher leakage current will inherently flow from the PV array to the grid through the stray capacitance. The leakage current increases the losses as well as the conducted and radiated electromagnetic interferences (EMI). Therefore, leakage current minimization is a key parameter to consider for the design and control of such a type of transformerless inverters. To overcome this issue, a variety of modified PV inverters topologies have been proposed with the aim to minimize the variation of the common mode voltage (CMV) that is the main source of this leakage current. However, the evaluation of their performances in terms CEM criteria has never been done before this work. Therefore, the main objective of this paper is to carry out a comparative study between three recent single-phase PV inverters topologies in terms of common mode and differential mode conducted disturbances.
近年来,人们对无变压器光伏逆变器越来越感兴趣,因为与有变压器的逆变器相比,无变压器光伏逆变器具有成本更低、体积更小、效率更高等显著优点。然而,更高的泄漏电流将固有地通过杂散电容从光伏阵列流向电网。泄漏电流增加了损耗,也增加了传导和辐射电磁干扰(EMI)。因此,泄漏电流最小化是设计和控制此类无变压器逆变器时需要考虑的关键参数。为了克服这个问题,已经提出了各种改进的PV逆变器拓扑结构,目的是尽量减少共模电压(CMV)的变化,这是泄漏电流的主要来源。然而,在这项工作之前,从未有人根据CEM标准对它们的性能进行评估。因此,本文的主要目的是对最近三种单相光伏逆变器拓扑结构在共模和差模传导干扰方面进行比较研究。
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引用次数: 4
A proposal for a variability management framework 可变性管理框架的建议
N. Khalfallah, Sami Ouali, N. Kraiem
Although the database schemas are an integral part of information systems, the use of software product lines has been mainly studied for the production of executable code. The impact on data management and in particular the database schemas are poorly documented and little studied in the literature. The paper is an attempt to explore some of the issues of the modeling and implementation of the variability in the database through the use of disciplined approaches. We propose a variability management framework. Motivations for developing the framework are three-fold: (a) to facilitate the comprehension of the discipline, (b) to classify and compare existing approaches to managing this discipline and (c) to extract their insufficiencies to propose an approach that remedies these insufficiencies and resolve problems related to this discipline. Finally, we introduce seven different variability management approaches and their instantiation according to the variability management framework.
虽然数据库模式是信息系统的一个组成部分,但研究软件产品线的使用主要是为了产生可执行代码。对数据管理的影响,特别是数据库模式的影响,文献记录很少,研究也很少。本文试图通过使用有纪律的方法来探索数据库中可变性的建模和实现的一些问题。我们提出了一个可变性管理框架。开发该框架的动机有三个方面:(a)促进对该学科的理解,(b)对管理该学科的现有方法进行分类和比较,(c)提取其不足之处,提出一种方法来弥补这些不足并解决与该学科相关的问题。最后,根据可变性管理框架,介绍了七种不同的可变性管理方法及其实例。
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引用次数: 3
A software infrastructure for multiservice access based on contactless smartcard and S-OrBAC model 基于非接触式智能卡和S-OrBAC模型的多业务接入软件基础架构
Mouad Mammass, Fattehallah Ghadi, Hafid Mammass
This paper present a software infrastructure for multiservice access solution based on S-OrBAC model and smartcard that allow benefiting from free or prepaid multiservice offered by big organizations. The authentication of users is made by the security features of the smartcard and the control of rights and attributes by a new variant S-OrBAC model based on the concept of service.
本文提出了一种基于S-OrBAC模型和智能卡的多业务接入解决方案的软件基础结构,可以从大型组织提供的免费或预付费多业务中获益。通过智能卡的安全特性对用户进行认证,通过基于服务概念的新型S-OrBAC模型对用户的权限和属性进行控制。
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引用次数: 1
期刊
2016 7th International Conference on Sciences of Electronics, Technologies of Information and Telecommunications (SETIT)
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