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2016 5th International Conference on Multimedia Computing and Systems (ICMCS)最新文献

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Backstepping control of the doubly fed induction generator using Xilinx System Generator for implementation on FPGA 基于Xilinx System generator的双馈感应发电机反步控制在FPGA上实现
Pub Date : 2016-09-01 DOI: 10.1109/ICMCS.2016.7905592
Marouane El Azzaoui, H. Mahmoudi, Chafik Ed-dahmani
This paper presents how to generate the VHDL code of the backstepping control of a doubly fed induction generator required for programming an FPGA without knowledge of VHDL programming. This control strategy will be developed by the Xilinx System Generator (XSG) tool integrated in matlab/simulink environment. The importance of this technique is to enjoy the benefits of Simulink and XSG. The first simulates the proposed control algorithm and the second generates the VHDL code of discrete algorithm that can subsequently be implemented on FPGA.
本文介绍了如何在不懂VHDL编程的情况下,生成FPGA编程所需的双馈感应发生器反步控制的VHDL代码。该控制策略将由集成在matlab/simulink环境中的Xilinx System Generator (XSG)工具开发。这种技术的重要性在于可以享受到Simulink和XSG的好处。首先对所提出的控制算法进行仿真,然后生成离散算法的VHDL代码,该代码随后可以在FPGA上实现。
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引用次数: 4
Trace-based system for metacognitive behavior in online learning activity 基于追踪的在线学习元认知行为系统
Pub Date : 2016-09-01 DOI: 10.1109/ICMCS.2016.7905610
Mohamed Taib Mohtadi, Adel Deraoui, H. Allali, A. Hajami
This article presents a “trace-based system” (TBS) integrated in a hypermedia learning environment (HLE). This HLE also includes metacognitive incentives with the aim of increasing the self-regulated learning behavior among learners. Digital traces of the activities recorded by the system enabled us to evaluate how learners performed metacognitive activities (orientation by objectives, planning, specification of goals, research & judgment, evaluation and monitoring). Using our TBS has allowed us to examine patterns of individual navigations through the HLE that reflect quality of self-regulation, the nature of the privileged pathways of learners, resources visited and time spent on each type of cognitive regulatory activity. This article describes the structure of the TBS and the results of his experiment.
本文介绍了一种集成在超媒体学习环境(HLE)中的“基于跟踪的系统”(TBS)。该机制还包括元认知激励,旨在提高学习者的自我调节学习行为。系统记录的活动的数字痕迹使我们能够评估学习者如何进行元认知活动(目标导向、计划、目标规范、研究和判断、评估和监测)。使用TBS,我们可以检查个体通过HLE的导航模式,这些模式反映了自我调节的质量、学习者特权路径的性质、访问的资源和在每种认知调节活动上花费的时间。本文介绍了TBS的结构和他的实验结果。
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引用次数: 1
New electrical model, simulation and optimization of a high voltage power supply for industrial microwave generators with two magnetrons, 1600 watts at 2.45GHz 2.45GHz、1600瓦双磁控管工业微波发生器高压电源的新电气模型、仿真与优化
Pub Date : 2016-09-01 DOI: 10.1109/ICMCS.2016.7905581
R. Batit, M. Chraygane, M. Ferfra
The purpose of this paper is to develop a new high voltage power supply for N=2 magnetrons, 800 Watts at 2450 MHz each; using a high voltage transformer with magnetic shunts. We present a new equivalent electrical circuit of this transformer which allowed, through its integration into the global electrical diagram of the new power supply, to model the entire high voltage power supply using numerical computation software EMTP dedicated to the transitional regimes. Then, a study of the influence of each geometrical parameter of the special HV transformer with magnétic shunts will guide us studying the optimization's strategy of this high voltage power supply for industrial microwave generators. This study allows achieving an important volume gains, congestion and weight, then consequently reducing the different costs of this high voltage power supply.
本文的目的是为N=2个磁控管开发一种新的高压电源,每个磁控管800瓦,2450 MHz;使用带磁分流的高压变压器。我们提出了该变压器的一个新的等效电路,通过将其集成到新电源的全局电气图中,可以使用专用于过渡政权的数值计算软件EMTP对整个高压电源进行建模。然后,研究带磁流变器的专用高压变压器各几何参数的影响,将指导我们研究该工业微波发生器高压电源的优化策略。这项研究可以实现重要的体积增益、拥塞和重量,从而降低这种高压电源的不同成本。
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引用次数: 1
Radial Charlier moment invariants for 2D object/image recognition 二维物体/图像识别的径向Charlier矩不变量
Pub Date : 2016-09-01 DOI: 10.1109/ICMCS.2016.7905531
M. E. Mallahi, Abderrahim Mesbah, H. Karmouni, Anass El Affar, A. Tahiri, H. Qjidaa
Radial Charlier moments as discrete orthogonal moments in the polar coordinate are better descriptor in image processing applications and pattern recognition. However, the translation and scale invariant property of these moments have not been studied due to its complexity of the problem. In this paper, we present a method to construct a set of rotation invariants extracted from radial Charlier moments, named radial Charlier moment invariants (RCMI). Experimental results show the efficiency and the robustness to reconstruction error (MSE), peak signal to noise ratio (PSNR) of the proposed method.
径向查利尔矩作为极坐标系下的离散正交矩,在图像处理和模式识别中具有较好的描述效果。然而,由于问题的复杂性,这些矩的平移和尺度不变性质尚未得到研究。本文提出了一种从径向Charlier矩中提取旋转不变量集的方法,称为径向Charlier矩不变量(RCMI)。实验结果表明了该方法的有效性和对重构误差(MSE)、峰值信噪比(PSNR)的鲁棒性。
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引用次数: 12
Reduction of Four-Wave Mixing nonlinear effects in dense WDM optical long-haul networks 密集WDM光长途网络中四波混频非线性效应的减小
Pub Date : 2016-09-01 DOI: 10.1109/ICMCS.2016.7905573
F. Chaoui, O. Aghzout, A. Alejos, F. Falcone, Mounia Chakkour, M. E. Yakhloufi
In this paper, Chirped Fiber Bragg Grating (FBG) has been introduced to reduce the Four Wave Mixing (FWM) nonlinear effects in dense Wavelength Division Multiplexing (WDM) for optical long-haul network. The proposed method has been investigated based on different chromatic dispersion levels. The objective of this procedure is to minimize the FWM nonlinear effects in dense WDM optical network regardless of chromatic dispersion phenomenon. As known, the main problem about treating FWM and Chromatic dispersion in optical fibers is that they are inversely proportional. That is why a module able to fulfill these two main limitation simultaneously is of great interest. The WDM transmission system is simulated using the advanced tools of Optisystem 7.0. The simulation results have been examined and validated by analyzing the optical spectrum analyzer and the eye diagram for the eight optical channels.
本文介绍了啁啾光纤布拉格光栅(FBG),以减少光长途网络中密集波分复用(WDM)中的四波混频(FWM)非线性效应。在不同色散水平下对该方法进行了研究。该程序的目的是在不考虑色散现象的情况下,尽量减少密集WDM光网络中的FWM非线性效应。众所周知,处理光纤中的FWM和色散的主要问题是它们成反比。这就是为什么一个能够同时满足这两个主要限制的模块是非常有趣的。利用Optisystem 7.0的先进工具对WDM传输系统进行仿真。通过分析光谱分析仪和8个光通道的眼图,对仿真结果进行了验证。
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引用次数: 1
Improvement of notch performances for UWB monopole antennas using CSRR and SSRR 利用CSRR和SSRR改进超宽带单极天线陷波性能
Pub Date : 2016-09-01 DOI: 10.1109/ICMCS.2016.7905562
A. Naghar, O. Aghzout, A. Alejos, D. A. Outerelo, F. Falcone
In order to improve the notch performance for UWB monopole antennas, a synthesis design of single band-notched UWB antenna using the Single Split Ring Resonator SSRR and Complementary Split Ring Resonator CSRR, is presented. These techniques provide a wide rejection with enhancement of rejection level, due to the high coupling between the SSRR and the ground plane and the use of the CSRR dynamic resonance. Proposed monopole antennas with loaded SSRR and CSRR particle are fabricated and measured to validate the design performance. A good agreement is achieved between measurement and simulation.
为了提高超宽带单极天线的陷波性能,提出了一种采用单裂环谐振器SSRR和互补裂环谐振器CSRR的单带陷波超宽带天线综合设计方案。由于SSRR与地平面之间的高度耦合以及CSRR动态共振的使用,这些技术提供了广泛的抑制和增强的抑制水平。制作了负载SSRR和CSRR粒子的单极子天线,并对其进行了测试,以验证设计性能。实验结果与仿真结果吻合较好。
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引用次数: 1
Empirical modeling of the narrowband Power Line Communication channel 窄带电力线通信信道的经验建模
Pub Date : 2016-09-01 DOI: 10.1109/ICMCS.2016.7905570
H. Gassara, F. Rouissi, A. Ghazel
This paper proposes an analytical model of the indoor Low-Voltage (LV) narrowband Power Line Communication (PLC) channel in the frequency range from 10 to 500 kHz. After the experimental demonstration of the frequency selective attenuation and the non-linear phase response of the PLC channel, a multipath transmission channel model is described by the superposition of delayed and attenuated propagation paths echoes. The low-frequency power line cable attenuation is linearly approximated based on two-conductor Transmission Line (TL) theory and field measurements. The Matrix Pencil (MP) algorithm is used for the model parameters identification and allows, with a quick convergence and a very low residual error, to detect the dominant propagation paths number as well as their corresponding weighting factors and delays. The proposed model, which is defined for any topology with a limited set of parameters, is validated through experimental measurements in the CENELEC/FCC/ARIB bands.
本文提出了10 ~ 500khz范围内室内低压(LV)窄带电力线通信(PLC)信道的解析模型。在实验证明了PLC信道的频率选择性衰减和非线性相位响应后,用延迟和衰减传播路径回波叠加的方法描述了多径传输信道模型。基于两导体传输线理论和现场实测,对低频电力线电缆的衰减进行了线性近似。采用矩阵铅笔(Matrix Pencil, MP)算法进行模型参数辨识,该算法收敛速度快,残差很小,可以检测出优势传播路径数及其对应的权重因子和时延。该模型适用于任何具有有限参数集的拓扑结构,并通过在CENELEC/FCC/ARIB波段的实验测量进行了验证。
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引用次数: 6
Frequency reconfigurable multiband meander patch antenna for cognitive radio with wide tuning frequency range 频率可重构多频带弯曲贴片天线用于宽调谐频率范围的认知无线电
Pub Date : 2016-09-01 DOI: 10.1109/ICMCS.2016.7905657
J. Floc'h, I. B. Trad, I. Rouissi
Reconfigurable antennas share attractive properties that can be used to enhance modern wireless systems performances. In this paper, a compact multiband meander antenna with frequency reconfigurable capabilities is studied and presented. The reference antenna is based on a meander patch structure radiating at F1=0.7, F2=1.46, F3=2.03, F4=2.75GHz and easy to be integrated on PCB (Printed Circuit Board). In order to electronically sweep the resonance frequencies over wide bands, one varactor diode was integrated between the meander patch printed on the top layer and a floating ground plane on the back layer. When applying reverse voltage, the proposed antenna is able to reach wide frequency ranges from 0.7 to 0.98GHz for F1, 1.46 to 2.02GHz for F2 and 2.23 to 2.47GHz for the new generated resonance frequency F5 (appears when applying a voltage V=9V (C=1.5pF) and more). The measured results agree well with simulations, good radiation properties were obtained. Realized prototype and related results are presented and discussed.
可重构天线具有吸引人的特性,可用于增强现代无线系统的性能。本文研究并提出了一种具有频率可重构能力的紧凑型多频带弯曲天线。参考天线基于弯曲贴片结构,辐射频率为F1=0.7, F2=1.46, F3=2.03, F4=2.75GHz,易于集成在PCB(印刷电路板)上。为了在较宽的频带上对谐振频率进行电子扫描,将一个变容二极管集成在顶层印刷的弯曲贴片和后层的浮动地平面之间。当施加反向电压时,所提出的天线能够达到较宽的频率范围,F1为0.7至0.98GHz, F2为1.46至2.02GHz,新产生的谐振频率F5为2.23至2.47GHz(当施加电压V=9V (C=1.5pF)或更高时出现)。测量结果与模拟结果吻合较好,获得了良好的辐射性能。给出了实现样机及相关结果,并进行了讨论。
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引用次数: 0
Comparative study of modulation techniques performances for communication over narrowband Powerline channel characteristics 窄带电力线信道通信调制技术性能的比较研究
Pub Date : 2016-09-01 DOI: 10.1109/ICMCS.2016.7905605
S. Najjar, F. Rouissi, H. Gassara, A. Ghazel
In this paper, we propose a study of modulation techniques performances in order to design a robust modem for narrowband Powerline Communications, with the required quality of service. We focus on binary and quaternary narrowband modulations, by the means of BER simulations and we expose modulated signals to real measured channel attenuation and impaired with channel noise, on the frequency band of 9 kHz to 500 kHz. At BER equal to 10−2 and a moderately attenuated channel, BPSK gave better performance than BFSK with a gain of 4 dB and MSK gained 5 dB over QPSK.
在本文中,我们提出了调制技术性能的研究,以设计一个鲁棒调制解调器窄带电力线通信,具有所需的服务质量。通过误码率模拟,我们重点研究了二进制和四元窄带调制,并在9 kHz至500 kHz的频段上将调制信号暴露于实际测量的信道衰减和信道噪声损害中。在BER = 10−2和中等衰减信道下,BPSK的增益比BFSK高4 dB, MSK的增益比QPSK高5 dB。
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引用次数: 4
Modeling of the thickness of a Submerged Tube by the Artificial Neural Network 基于人工神经网络的沉管厚度建模
Pub Date : 2016-09-01 DOI: 10.1109/ICMCS.2016.7905575
Y. Nahraoui, E. Aassif, G. Maze
Several theoretical and experimental studies show that the characterization of a tube can be done through the cut-off frequencies of the anti-symmetric circumferential waves A1 propagating around the tube of various radius ratio b/a (a: outer radius and b: inner radius). This work investigates the abilities of Artificial Neural Networks ANN to predict the thickness of a tube immersed in water for various cut-frequency of anti-symmetric circumferential wave A1. The useful data determinated from calculated trajectories of natural modes of resonances, were used to develop and to test the performances of these models. The ANN model was trained using Levenberg-Marquardt(LM) algorithm. Several configurations are evaluated during the development of these networks. The Mean Absolute Error (MAE), Mean Relative Error (MRE), Standard Error (SE), Root Mean Square Error (RMSE) and Correlation Coefficient (R) were the statistical performance indices, that were used to evaluate the accuracy of the various models. Based on the comparison between ANN and theoretical method, it was found that the ANN model can be applied successfully in the in the modeling of the thickness of a Submerged Tube.
一些理论和实验研究表明,可以通过不同半径比b/a (a:外半径和b:内半径)的管周围传播的反对称周波A1的截止频率来表征管的特性。本文研究了人工神经网络(ANN)在不同的反对称周波A1切割频率下预测浸入水中管的厚度的能力。从计算的自然共振模态轨迹中确定的有用数据用于开发和测试这些模型的性能。采用Levenberg-Marquardt(LM)算法对人工神经网络模型进行训练。在这些网络的开发过程中,评估了几种配置。平均绝对误差(MAE)、平均相对误差(MRE)、标准误差(SE)、均方根误差(RMSE)和相关系数(R)为统计性能指标,用于评价各种模型的准确性。通过与理论方法的比较,发现人工神经网络模型可以成功地应用于沉管厚度的建模。
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引用次数: 0
期刊
2016 5th International Conference on Multimedia Computing and Systems (ICMCS)
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