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2019 International Conference on Advanced Electrical Engineering (ICAEE)最新文献

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Sinogram interpolation method for limited-angle tomography 有限角度层析成像的正弦图插值方法
Pub Date : 2019-11-01 DOI: 10.1109/ICAEE47123.2019.9015130
A. Benammar, A. Allag, R. Drai, M. yahi, T. Boutkedjirt
This work aims to study and implement a reconstruction method of X-ray tomography able to reconstruct the image from insufficent number of projections. We proposed a new algorithm using the sinogram interpolation. The sinogram restoration is based on the incomplete sinogram available and generates additional data. The reconstructed images were obtained from the interpolated projections, using the classical FBP method, the quality of the reconstructed image depend on the quality and quantity of the projections. Our study showed image restoration performance in case of missing data and shows improved quality of CT images with reduced artifacts in the reconstruction results.
本工作旨在研究和实现一种能够在投影数量不足的情况下重建图像的x射线断层扫描重建方法。提出了一种利用正弦图插值的新算法。正弦图恢复是基于可用的不完整的正弦图,并生成额外的数据。通过插值投影得到重建图像,采用经典的FBP方法,重建图像的质量取决于插值投影的质量和数量。我们的研究显示了在数据缺失情况下的图像恢复性能,并显示了CT图像质量的提高,重建结果中的伪影减少。
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引用次数: 5
Hybridization between the FDTD Method and Sommerfeld Integrals for Lightning Electromagnetic Field Calculation 雷电电磁场计算中FDTD法与Sommerfeld积分的杂交
Pub Date : 2019-11-01 DOI: 10.1109/ICAEE47123.2019.9015116
K. Habri, Z. Azzouz, A. Mimouni
In this paper we propose a new method for the calculation of the lightning electromagnetic field above a perfectly conducting ground. The proposed method is based on the analytical determination of the magnetic field values in the boundary of the meshed region. The computation of the electromagnetic field inside this region is performed using the FDTD (Finite Difference Time-Domain) method. One of the great advantages of this hybrid method is the possibility of taking the lightning channel outside the region of analysis, which will reduce the size of the matrix involved in this calculation. The comparison of results obtained using this approach with those obtained using other absorbing boundary conditions has shown a better accuracy for our approach.
本文提出了一种计算完全导电地面上雷电电磁场的新方法。该方法基于网格边界磁场值的解析确定。利用时域有限差分(FDTD)方法对该区域内的电磁场进行计算。这种混合方法的一大优点是可以将闪电通道置于分析区域之外,从而减小了计算中所涉及的矩阵的大小。将该方法与其他吸收边界条件下的结果进行了比较,结果表明该方法具有较高的精度。
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引用次数: 0
Modulation of micro/nanobiostructure’s functions by intense nanosecond pulsed electric fields 强纳秒脉冲电场对微纳生物结构功能的调控
Pub Date : 2019-11-01 DOI: 10.1109/ICAEE47123.2019.9015154
D. E. Chafai, M. Cifra
While intense nanosecond pulsed electric field is known to affect subcellular structures and cell membrane (permanent disruption effect), there is still a lack of studies on the modulation effects of nanosecond pulsed electric field and its mechanism of action. In this work, we experimentally demonstrate in vitro direct effects of intense (20 kV/cm) pulsed electric field of 10 ns pulse width on tubulin capacity of self-assembly into microtubules – tracks for protein nanomotors - in a dose-dependent manner, which leads to a reversible and irreversible control of their polymerization. We used also the same type of pulses to modulate the cell surface-microenvironment interaction. Cell surface – microenvironment interact was the target of our work because of its importance in nanomaterial delivery. The results confirm that we could modulate the surface interaction while preserving the cell viability.
虽然已知强纳秒脉冲电场会影响亚细胞结构和细胞膜(永久性破坏效应),但对纳秒脉冲电场的调制作用及其作用机制的研究还很缺乏。在这项工作中,我们通过实验证明了10 ns脉冲宽度的强(20 kV/cm)脉冲电场以剂量依赖的方式对微管蛋白自组装成微管(蛋白质纳米马达的轨道)的能力产生直接影响,从而导致其聚合的可逆和不可逆控制。我们还使用相同类型的脉冲来调节细胞表面与微环境的相互作用。细胞表面-微环境相互作用是我们研究的目标,因为它在纳米材料传递中的重要性。结果证实,我们可以在保持细胞活力的同时调节表面相互作用。
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引用次数: 0
Application of Fuzzy Controller to Minimize Torque and Flux Ripples of PMSM 模糊控制器在永磁同步电机转矩和磁链波动最小化中的应用
Pub Date : 2019-11-01 DOI: 10.1109/ICAEE47123.2019.9015066
K. Kakouche, W. Guendouz, T. Rekioua, S. Mezani, T. Lubin
This paper presents the application of fuzzy logic torque and speed control of a permanent magnet synchronous machine (PMSM) using direct torque control (DTC). In this approach, the classical controllers are replaced by two fuzzy controllers to minimize torque, flux and current ripples. A comparative study between the classical DTC and fuzzy logic DTC shows that flux, torque and stator currents have been minimized without any effective change of the inverter switching frequency.
本文介绍了直接转矩控制(DTC)在永磁同步电机(PMSM)转矩和转速控制中的应用。在这种方法中,用两个模糊控制器代替经典控制器,以最小化转矩、磁链和电流波动。通过对经典直接转矩控制和模糊逻辑直接转矩控制的对比研究表明,在不改变逆变器开关频率的情况下,使磁链、转矩和定子电流达到最小。
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引用次数: 5
Performance of Organic Solar Cells with Recovery 有机太阳能电池的回收性能
Pub Date : 2019-11-01 DOI: 10.1109/ICAEE47123.2019.9014758
D. Naas, B. Larbi, Bessissa Lakhdar
In this paper, we have studied the degradation of organic solar cells (OSCs) in different way considering the recovery phenomenon. The carried out work is based on the application of outdoor test in the SDU laboratory (Sonderborg Denmark) by using the protocol ISOS-O-1. The test took 14 days, this duration is divided into two parts: first part 5 days where the samples were put in the roof for the degradation for 7 hours and we measure the electric parameters before putting them on the roof and in the glovebox. In the second part the samples were put in the glovebox for all the remaining days and different parameters have been measured two times per-day (morning-evening) the duration of the second part is 9 days.
本文从不同的角度研究了有机太阳能电池的降解,并考虑了回收现象。所开展的工作是基于在SDU实验室(丹麦森德堡)使用iso - o -1协议进行室外测试的应用。测试耗时14天,时间分为两部分:第一部分5天,将样品放在屋顶进行降解7小时,在将样品放在屋顶和手套箱中之前,我们测量了电气参数。在第二部分中,剩余的所有天将样品放入手套箱中,每天两次(早晚)测量不同的参数,第二部分的持续时间为9天。
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引用次数: 0
Restoration of noisy radiographic images applied in Non Destructive Testing (NDT) 在无损检测(NDT)中的应用
Pub Date : 2019-11-01 DOI: 10.1109/ICAEE47123.2019.9014675
M. Sahnoun, A. Allag, R. Drai, A. Benammar
Restoring degraded images is a problem that is part of the digital image processing domain. When acquiring images, phenomena such as noise, blur and bad quality are always present. Our goal is to reduce noise in the case of radiographic images applied in Non Destructive Testing (NDT) to get closer to a more authentic image. In our simulation we considered a Gaussian noise and a real noise, we use methods based on minimization algorithms without constraints such as fixed step gradient, optimization algorithms with constraints such as the projected gradient algorithm and an algorithm that applies a regularization (Total Variation) based Rudin-Osher-Fatemi model (ROF) using the Chambolle projection to improve the quality of the results. At the end a comparative study of algorithms used.
恢复退化图像是数字图像处理领域的一个问题。在获取图像时,噪点、模糊和质量差等现象总是存在。我们的目标是在无损检测(NDT)中减少射线成像图像中的噪声,以获得更真实的图像。在我们的模拟中,我们考虑了高斯噪声和真实噪声,我们使用了基于无约束的最小化算法(如固定步长梯度)、基于约束的优化算法(如投影梯度算法)和基于正则化(全变分)的Rudin-Osher-Fatemi模型(ROF)的算法(使用Chambolle投影)来提高结果质量。最后对所采用的算法进行了比较研究。
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引用次数: 0
Epileptic Seizure Detection by Quadratic Time-Frequency Distributions of Electroencephalogram signals 利用脑电图信号的二次时频分布检测癫痫发作
Pub Date : 2019-11-01 DOI: 10.1109/ICAEE47123.2019.9015167
Fayza Ghembaza, A. Djebbari
Epilepsy is a chronic disorder caused by recurring seizures which can be detected by analyzing Electroencephalogram (EEG) signals. Several analysis methods have been deployed to recognize the non-stationary multicomponent content in relation with seizures within EEG signals. In this paper, we analyzed CHB-MIT Scalp EEG database signals by high-resolution quadratic time-frequency distributions, namely; the Spectrogram (SP), the Smoothed Pseudo Wigner-Ville Distribution (SPWVD), and the Choi-Williams Distribution (CWD) in a comparison viewpoint. We accomplished this study to evaluate the performance of each method towards detecting seizure within EEG signals. We used the time-frequency extended Renyi Entropy (RE) as a performance metric towards energy distribution complexity Within the time-frequency plane. We calculated this parameter over frequency bandwidths of Delta, Theta, Alpha, Beta, and Gamma brainwaves for the Quadratic Time-Frequency Distributions (QTFDs) of normal and abnormal EEG signals.
癫痫是一种由反复发作引起的慢性疾病,可以通过分析脑电图(EEG)信号来检测。几种分析方法已经部署,以识别非平稳的多成分内容与癫痫发作的脑电图信号。本文采用高分辨率二次时频分布对CHB-MIT头皮EEG数据库信号进行分析,即;比较了谱图(SP)、平滑伪Wigner-Ville分布(SPWVD)和Choi-Williams分布(CWD)。我们完成了这项研究,以评估每种方法在脑电图信号中检测癫痫发作的性能。我们使用时频扩展Renyi熵(RE)作为表征时频平面内能量分布复杂度的性能指标。我们对正常和异常脑电图信号的二次时频分布(QTFDs)的Delta、Theta、Alpha、Beta和Gamma脑电波的频率带宽进行了计算。
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引用次数: 1
Terahertz time-domain spectroscopy for the detection and identification of concealed materials in transmission and reflection configurations 用于探测和识别传输和反射结构中隐藏物质的太赫兹时域光谱学
Pub Date : 2019-11-01 DOI: 10.1109/ICAEE47123.2019.9014822
Noureddine Maamar, Mohamed Lazoul
The main purpose of this work is to demonstrate the capabilities of terahertz time-domain spectroscopy (THz-TDS) technique for noncontact and noninvasive identification of prohibited materials even they are concealed by ordinary fabrics. We will particularly highlight the interest of carrying out combined measurements in transmission and in reflection, especially in the case when the samples are made by a mixture of several constituents. To emphasize the relevance of our approach, we have used vanillin, which exhibits very clear resonant frequencies in the terahertz range. Vanillin hidden through textiles (wool and cotton) are tested using transmission and reflection THz-TDS configurations in the range from 0.3 to 1.5 THz. For either transmission or reflection measurements, our results demonstrate that concealed materials can be successfully detected and identified using the THz-TDS technique.
这项工作的主要目的是证明太赫兹时域光谱(THz-TDS)技术对普通织物隐藏的违禁物质进行非接触和非侵入性识别的能力。我们将特别强调对透射和反射进行联合测量的兴趣,特别是在样品由几种成分混合制成的情况下。为了强调我们方法的相关性,我们使用了香草醛,它在太赫兹范围内表现出非常清晰的共振频率。通过纺织品(羊毛和棉花)隐藏的香兰素使用透射和反射太赫兹tds配置在0.3至1.5太赫兹范围内进行测试。对于透射或反射测量,我们的结果表明,使用太赫兹- tds技术可以成功地检测和识别隐藏材料。
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引用次数: 0
Diffusion In The Wavelet Domain For Denoising Radiographic Images Of Welding Defects 基于小波域扩散的焊接缺陷射线图像去噪方法
Pub Date : 2019-11-01 DOI: 10.1109/ICAEE47123.2019.9015093
F. Boudani, Nafaa Nacereddine
In this paper, we aimed to filter radiographic weld images to facilitate weld defects detection and to improve the automatic industrial inspection. The noisy images were contaminated by three types of noise: the multiplicative speckle noise, the additive Gaussian white noise, and the mixed noise combining the two kinds of noise. Wavelet-based filters and anisotropic diffusion techniques have proven their worth in reducing both Gaussian additive noise and speckle noise. We presented in this work a filtering algorithm based on diffusion in the wavelet packet domain to enhance the quality of the noisy weld images. Comparing the performance of this approach to other wavelet based methods, experiments proved the wavelet packet diffusion’s effectiveness in reducing noise and preserving defects details.
在本文中,我们的目的是过滤射线摄影焊缝图像,以方便焊缝缺陷的检测和提高自动化工业检测。噪声图像被三种类型的噪声污染:乘性散斑噪声、加性高斯白噪声和两种噪声的混合噪声。基于小波的滤波器和各向异性扩散技术已经证明了它们在降低高斯加性噪声和散斑噪声方面的价值。本文提出了一种基于小波包域扩散的滤波算法,以提高噪声焊接图像的质量。将该方法与其他基于小波的方法进行了比较,实验证明了小波包扩散在降噪和保留缺陷细节方面的有效性。
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引用次数: 3
Design of a Robust Voltage Controller for a DC-DC Buck Converter Using Fractional-Order Terminal Sliding Mode Control Strategy 基于分数阶终端滑模控制策略的DC-DC降压变换器鲁棒电压控制器设计
Pub Date : 2019-11-01 DOI: 10.1109/ICAEE47123.2019.9014788
B. Babes, A. Boutaghane, N. Hamouda, Mohamed Mezaache
This paper suggests a fractional-order terminal sliding mode control (FO-TSMC) method for the output voltage regulation of a DC-DC Buck (Step-Down) converter influenced by disturbances, such as the changes of input voltage and load resistance. A this kind of a new fractional sliding surface is designed to avoid the drawback on integer-order (IO) terminal sliding mode control (IO-TSMC) method and guarantee the converter attain stable-state readily without chattering even if it undergoes arbitrary random disturbances. The proposed FOTSMC controller’s performance is compared against to both IOTSMC and traditional SMC control approaches. Computer simulation results display that the novel FO-TSMC approach results in evenhanded output voltage control under different load situations and wide input voltage changes.
本文提出了一种分数阶终端滑模控制(FO-TSMC)方法,用于受输入电压和负载电阻变化等干扰影响的DC-DC降压变换器的输出电压调节。设计了一种新的分数阶滑动面,避免了整数阶(IO)端滑模控制(IO- tsmc)方法的缺点,保证了变换器即使受到任意随机干扰也能很容易地达到无抖振的稳定状态。将所提出的FOTSMC控制器的性能与IOTSMC和传统SMC控制方法进行了比较。计算机仿真结果表明,该方法在不同负载情况和宽输入电压变化下均能实现输出电压的均匀控制。
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引用次数: 14
期刊
2019 International Conference on Advanced Electrical Engineering (ICAEE)
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