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2017 International Conference on Advanced Technologies for Signal and Image Processing (ATSIP)最新文献

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Saliency attention and sift keypoints combination for automatic target recognition on MSTAR dataset MSTAR数据集上显著性关注与sift关键点组合的目标自动识别
Ayoub Karine, A. Toumi, A. Khenchaf, M. Hassouni
This paper aims to present a novel method for automatic target recognition based on synthetic aperture radar (SAR) images. In order to describe a region of interest (target area), we use a saliency attention model. Then, the produced saliency map is used as a mask on SAR image in order to separate the ground target from the background. After that, we calculate the scale invariant feature transform (SIFT) descriptors of the transformed SAR image. In this way, we maintain only the SIFT keypoints located in the salient region. This strategy leads not only to reduce the dimensionality but also enhances its discriminative power. For recognition step, a matching approach between vector descriptors of unknown image target and all known images stored in training data set is adopted. To validate the proposed approach, MSTAR data set is used. The obtained experimental results show that our approach can effectively describe a SAR image, and obviously improve the recognition rate.
提出了一种基于合成孔径雷达(SAR)图像的目标自动识别新方法。为了描述感兴趣的区域(目标区域),我们使用显著性注意模型。然后,将生成的显著性图作为SAR图像上的掩模,实现地面目标与背景的分离。然后,计算变换后的SAR图像的尺度不变特征变换(SIFT)描述子。这样,我们只保留了位于显著区的SIFT关键点。该策略不仅降低了维数,而且提高了其判别能力。在识别步骤中,采用未知图像目标的向量描述子与训练数据集中存储的所有已知图像的匹配方法。为了验证所提出的方法,使用了MSTAR数据集。实验结果表明,该方法能够有效地描述SAR图像,显著提高了图像的识别率。
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引用次数: 11
Control wind energy system to variable speed based on the permanent magnet synchronous generator 基于永磁同步发电机控制风能系统变速
Dalila Hammoumi, C. Bekkali, M. Karim, M. Taoussi, B. Bossoufi, A. Lagrioui
In this work, we present the study and the modeling of a variable speed wind energy system based on the permanent magnet synchronous generator. The proposed system produces through a rectifier and an inverter controlled by PI regulators in the objective to obtain optimum energy efficiency by improving a robust, perform and effective the active and reactive power control of the system. The simulation results obtained under MATLAB / SIMULINK environment showed the robustness and the performances of the system.
本文对基于永磁同步发电机的变速风能系统进行了研究和建模。该系统通过一个整流器和一个由PI调节器控制的逆变器产生,目的是通过提高系统的有功和无功控制的鲁棒性、性能和有效性来获得最佳的能源效率。在MATLAB / SIMULINK环境下的仿真结果表明,该系统具有良好的鲁棒性和性能。
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引用次数: 2
A review on speech emotion recognition: Case of pedagogical interaction in classroom 语音情感识别研究综述:以课堂教学互动为例
Leila Kerkeni, Y. Serrestou, M. Mbarki, K. Raoof, M. Mahjoub
Emotions play a key role in cognitive processes, particularly in learning. Educators should know the emotional state of each student during a teaching activity. They must help students to experiment, interact and explore new topics and constructs. Students must feel in a state that maximize their performance. To know the emotional state of student, we need an emotion recognition system. It can be based on emotion recognition from speech (SER). SER is an important research area in humancomputer systems interaction (HCI). The major challenges for making a speech emotion recognition system are selecting the most suitable features and choosing the appropriate classification method. In this paper, we overview emotional speech recognition bearing in mind the role of emotions in learning. Here below we present briefly the obtained results by our SER system.
情绪在认知过程中起着关键作用,尤其是在学习过程中。在教学活动中,教育者应该了解每个学生的情绪状态。他们必须帮助学生实验、互动和探索新的主题和结构。学生必须感觉自己处于一种能最大限度地发挥他们的表现的状态。为了了解学生的情绪状态,我们需要一个情绪识别系统。它可以基于语音情感识别(SER)。SER是人机系统交互(HCI)的一个重要研究领域。语音情感识别系统的主要挑战是选择最合适的特征和选择合适的分类方法。在本文中,我们概述了情绪语音识别在学习中的作用。下面我们简要介绍我们的SER系统所获得的结果。
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引用次数: 20
Fast and efficient geometric constraints optimization for an automatic 3D modelling 快速有效的几何约束优化自动三维建模
Afafe Annice, A. Abderrahmani, K. Satori
We present our 3D models reconstructed based on geometric constraints. Used constraints in 3D reconstruction are frequently inaccurate. In fact, we detect an important set of theme, which one can we choose as input of reconstruction method? So, redundancies, cycles and inaccurate 3D model present a challenge to overcome. It is therefore necessary to “beautify” constraint and to elaborate an accurate 3D model before use in reconstruction systems. We present in our work a new method of 3D model elaboration. So, we remove redundancies; cycles and we bring a safe and final 3D model with an optimal freedom degree of estimated parameters. Our reconstruction algorithm first prioritizes the constraint detection. User can add them manually or through an automatic process. But the important thing is to avoid 3D modeling step which is very challenging. To detect and eliminate redundant and inconsistent constraints use freedom degree analysis. Results from our implementation show that the method can beautify and optimize recovered 3D models correctly at acceptable speed
提出了基于几何约束重构的三维模型。在三维重建中使用的约束常常是不准确的。事实上,我们发现了一组重要的主题,我们可以选择哪一个作为重建方法的输入?因此,冗余、周期和不准确的3D模型是需要克服的挑战。因此,在重建系统中使用之前,有必要“美化”约束并精心制作精确的3D模型。我们在工作中提出了一种新的三维模型精化方法。所以,我们去掉冗余;得到了一个安全的最终三维模型,该模型具有估计参数的最优自由度。我们的重构算法首先优先考虑约束检测。用户可以手动或通过自动过程添加它们。但重要的是要避免三维建模的步骤,这是非常具有挑战性的。利用自由度分析来检测和消除冗余约束和不一致约束。实现结果表明,该方法能够以可接受的速度对恢复的三维模型进行正确的美化和优化
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引用次数: 0
Energy based collision avoidance at the MAC layer for wireless sensor network 无线传感器网络MAC层基于能量的避碰
Imad Iala, Mourad Ouadou, D. Aboutajdine, O. Zytoune
A Wireless Sensor Network (WSN) is a network of thousands of low-cost sensors which have a limited operating lifetime. A sensor node generally comprises four basic elements, including a transceiver unit, a detection unit, a processing unit, and an energy supply unit. One of the major challenges in the WSN is to increase the network life-time. Since the transmitting/receiving unit has the highest energy consumption, reducing it increases the network life-time significantly. In this work, we propose to differentiate resources or services in order to provide high performances of Quality of Service (QoS) to the prioritized node, since the Medium Access Control (MAC) layer is considered as the responsible that manages the access to the transmission channel. Therefore, we need to manage the quality of service of this layer in order to give high chance to nodes with a lower energy level to get access to the tranmission channel to send the data before their batteries run out. In this article, we present a new technique called Energy based Collision Avoidance (ECA-MAC), that handles WSN energy constraints and the QoS designed for versatile applications. ECA-MAC protocol aims at controlling the access to the medium according to nodes energy level and at reducing the collision using different Contention Windows (CW). Our simulation results show that ECA-MAC protocol improves the QoS in terms of Packet Delivery Ratio (PDR), message latency, and energy consumption.
无线传感器网络(WSN)是由数千个低成本传感器组成的网络,这些传感器具有有限的工作寿命。传感器节点一般包括四个基本要素,包括收发器单元、检测单元、处理单元和能源供应单元。无线传感器网络面临的主要挑战之一是如何延长网络寿命。由于发送/接收单元的能耗最高,降低能耗可以显著延长网络寿命。在这项工作中,我们建议区分资源或服务,以便为优先节点提供高性能的服务质量(QoS),因为介质访问控制(MAC)层被认为是负责管理对传输通道的访问。因此,我们需要对这一层的服务质量进行管理,使能量较低的节点有较大的机会在电池耗尽之前进入传输通道发送数据。在本文中,我们提出了一种新的技术,称为基于能量的碰撞避免(ECA-MAC),它处理无线传感器网络的能量约束和为通用应用而设计的QoS。ECA-MAC协议的目的是根据节点的能量级别来控制对介质的访问,并利用不同的竞争窗口(CW)来减少冲突。仿真结果表明,ECA-MAC协议在PDR (Packet Delivery Ratio)、消息延迟和能耗方面提高了服务质量。
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引用次数: 14
Visual tracking of a moving object via the soft cosine measure 通过软余弦测量的移动对象的视觉跟踪
Driss Moujahid, O. Elharrouss, H. Tairi
In this paper, we propose a Local Soft Similarity based on Soft Cosine Measure (L3SCM) and then we incorporate it into visual tracking framework. Firstly, we present the soft cosine measure that measures the soft similarity between two vectors of features by taking into consideration similarities of pairs of features. Secondly, we apply this soft similarity in the observation model component of the proposed tracker to measure the local similarities between the template of the tracked target and the sampled candidates. Finally, in order to improve the robustness of the proposed tracker, we integrate a simple scheme to update the target template throughout the tracking process. Experimental results on several challenging image sequences illustrate that the proposed method performs better against several state-of-the-art trackers.
本文提出了一种基于软余弦测度的局部软相似度(L3SCM)算法,并将其纳入视觉跟踪框架。首先,我们提出了软余弦度量,通过考虑特征对的相似度来度量两个特征向量之间的软相似度。其次,我们将这种软相似度应用于跟踪器的观测模型组件中,测量被跟踪目标模板与被采样候选模板之间的局部相似度。最后,为了提高所提跟踪器的鲁棒性,我们集成了一个简单的方案,在整个跟踪过程中更新目标模板。在几个具有挑战性的图像序列上的实验结果表明,该方法对几种最先进的跟踪器具有更好的性能。
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引用次数: 1
Link budget analysis for a LEO cubesat communication subsystem 低轨道立方体卫星通信子系统链路预算分析
I. Latachi, M. Karim, A. Hanafi, T. Rachidi, Ahmed Khalayoun, N. Assem, S. Dahbi, S. Zouggar
Communication links between a satellite and the ground station are subject to a lot of impairments and losses, such as noise and atmospheric attenuations, and Doppler shift effects. It is therefore paramount to design a reliable link that caters for these impairments. The main challenge is to design a communication subsystem that provides enough transmission power to close the link, while being power efficient and at the same time delivering the required link characteristics in terms of effective bit rate and bit error rate. In this paper, we present a link budget analysis for communication between a nano-satellite orbiting at LEO and a low cost mission control ground station. The analysis employs relevant deterministic, empirical, and statistical models as prediction tools, to make pertinent choices for both the flight nano-satellite compliant communication board, on the one hand and the ground station hardware and link protocols, on the other hand.
卫星和地面站之间的通信链路受到许多损伤和损失,例如噪声和大气衰减,以及多普勒频移效应。因此,设计一个满足这些缺陷的可靠链接是至关重要的。主要的挑战是设计一个通信子系统,它提供足够的传输功率来关闭链路,同时节能,同时在有效比特率和误码率方面提供所需的链路特性。本文提出了低轨道纳米卫星与低成本任务控制地面站通信的链路预算分析。分析采用相关的确定性模型、经验模型和统计模型作为预测工具,对飞行纳米卫星兼容通信板以及地面站硬件和链路协议进行针对性选择。
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引用次数: 17
Design and simulation of a multiband orthomodetransducer in k/Ka band for satellite communications 用于卫星通信的 k/Ka 波段多频带正交变送器的设计与仿真
Abdellah El Kamili, A. Tribak, J. Terhzaz, A. Mediavilla
This paper describes the design and simulation of a waveguide multiband Orthomode Transducer (OMT) from 15 to 32 Ghz. The OMT is based on a symmetric backward coupling structure and has a square common waveguide input port and two single mode rectangular waveguide outputs. The coupling structure is located in the common rectangular waveguide and stepped to get the desired operating bands. The device was designed and optimized using Mician μwave wizard and CST Microwave Studio. From 15 to 33 GHz the simulated input return loss was about 30 dB, the isolation between the output ports was better than 40 dB. The circuit is designed regarding standard waveguide technology to meet feed chain requirement for antenna in satellite communications in wideband frequencies.
本文介绍了 15 至 32 千兆赫波导多频带正交模态传感器(OMT)的设计和仿真。OMT 基于对称后向耦合结构,有一个正方形公共波导输入端口和两个单模矩形波导输出端口。耦合结构位于共用矩形波导中,通过阶跃来获得所需的工作频带。该器件使用 Mician μwave 向导和 CST Microwave Studio 进行设计和优化。从 15 GHz 到 33 GHz,模拟输入回波损耗约为 30 dB,输出端口之间的隔离度优于 40 dB。该电路采用标准波导技术设计,可满足宽带卫星通信天线的馈电链要求。
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引用次数: 0
A robust blind 3-D mesh watermarking based on wavelet transform for copyright protection 基于小波变换的版权保护鲁棒盲三维网格水印
Mohamed Hamidi, M. Haziti, H. Cherifi, D. Aboutajdine
Nowadays, three-dimensional meshes have been extensively used in several applications such as, industrial, medical, computer-aided design (CAD) and entertainment due to the processing capability improvement of computers and the development of the network infrastructure. Unfortunately, like digital images and videos, 3-D meshes can be easily modified, duplicated and redistributed by unauthorized users. Digital watermarking came up while trying to solve this problem. In this paper, we propose a blind robust watermarking scheme for three-dimensional semiregular meshes for Copyright protection. The watermark is embedded by modifying the norm of the wavelet coefficient vectors associated with the lowest resolution level using the edge normal norms as synchronizing primitives. The experimental results show that in comparison with alternative 3-D mesh watermarking approaches, the proposed method can resist to a wide range of common attacks, such as similarity transformations including translation, rotation, uniform scaling and their combination, noise addition, Laplacian smoothing, quantization, while preserving high imperceptibility.
随着计算机处理能力的提高和网络基础设施的发展,三维网格已广泛应用于工业、医疗、计算机辅助设计(CAD)和娱乐等领域。不幸的是,像数字图像和视频一样,3d网格很容易被未经授权的用户修改、复制和重新分发。在试图解决这个问题时,数字水印出现了。本文提出了一种用于版权保护的三维半规则网格的盲鲁棒水印方案。利用边缘法范数作为同步基元,通过修改与最低分辨率水平相关的小波系数向量的范数来嵌入水印。实验结果表明,与其他三维网格水印方法相比,该方法可以抵抗平移、旋转、均匀缩放及其组合、噪声添加、拉普拉斯平滑、量化等多种常见攻击,同时保持较高的不可感知性。
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引用次数: 18
Dynamic modeling and control of a wind turbine with MPPT control connected to the grid by using PMSG 基于PMSG的并网MPPT控制风力机动态建模与控制
Y. E. Mourabit, O. Zamzoum
This paper work develops the dynamic model of a wind system based on a permanent magnet synchronous generator (PMSG). The dynamic modeling of the system requires prior knowledge of the parameters of the turbine, of the machine and of the static converters which are controlled by the pulse width modulation (PMW) to ensure the interconnection between the generator and the grid. Using a control approach called Field Oriented Control (FOC) based on optimum torque control (OTC) and using the Maximum Power Point Tracking (MPPT) method, the system can operate at a variable wind speed in an optimal way. The simulation results and the global system are simulated under the MATLAB / Simulink environment.
本文建立了基于永磁同步发电机(PMSG)的风力系统动力学模型。系统的动态建模需要预先了解涡轮机、机器和静态变流器的参数,这些参数由脉冲宽度调制(PMW)控制,以确保发电机和电网之间的互连。采用一种基于最优转矩控制(OTC)和最大功率点跟踪(MPPT)方法的磁场定向控制(FOC)控制方法,系统可以在可变风速下以最优方式运行。在MATLAB / Simulink环境下对仿真结果和整体系统进行了仿真。
{"title":"Dynamic modeling and control of a wind turbine with MPPT control connected to the grid by using PMSG","authors":"Y. E. Mourabit, O. Zamzoum","doi":"10.1109/ATSIP.2017.8075587","DOIUrl":"https://doi.org/10.1109/ATSIP.2017.8075587","url":null,"abstract":"This paper work develops the dynamic model of a wind system based on a permanent magnet synchronous generator (PMSG). The dynamic modeling of the system requires prior knowledge of the parameters of the turbine, of the machine and of the static converters which are controlled by the pulse width modulation (PMW) to ensure the interconnection between the generator and the grid. Using a control approach called Field Oriented Control (FOC) based on optimum torque control (OTC) and using the Maximum Power Point Tracking (MPPT) method, the system can operate at a variable wind speed in an optimal way. The simulation results and the global system are simulated under the MATLAB / Simulink environment.","PeriodicalId":259951,"journal":{"name":"2017 International Conference on Advanced Technologies for Signal and Image Processing (ATSIP)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134537560","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
期刊
2017 International Conference on Advanced Technologies for Signal and Image Processing (ATSIP)
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