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Time frequency distribution and deep neural network for automated identification of insomnia using single channel EEG-signals 利用单通道脑电信号的时频分布和深度神经网络自动识别失眠症
IF 1.3 4区 工程技术 Q3 Computer Science Pub Date : 2024-02-09 DOI: 10.1109/TLA.2024.10431420
Kamlesh Kumar;Prince Kumar;Ruchit Kumar Patel;Manish Sharma;Varun Bajaj;U Rajendra Acharya
It is essential to have enough sleep for a healthy life; otherwise, it may lead to sleep disorders such as apnea, narcolepsy, insomnia, and periodic leg movements. A polysomnogram (PSG) is typically used to analyze sleep and identify different sleep disorders. This work proposes a novel convolutional neural network (CNN)-based technique for insomnia detection using single-channel electroencephalogram (EEG) signals instead of complex PSG. Morlet wavelet-based continuous wavelet transforms and smoothed pseudo-Wigner-Ville distribution (SPWVD) are explored in the proposed method to obtain scalograms of EEG signals of duration 1s along with convolutional layers for features extraction and image classification. The Morlet transform is found to be a better time-frequency distribution. We have developed Morlet wavelet-based CNN (MWTCNNet) for the classification of healthy and insomniac patients using cyclic alternating pattern (CAP) and sleep disorder research centre (SDRC) databases with C4-A1 single-channel EEG derivation. We have used multiple cohorts/settings of the CAP and SDRC databases to analyse the performance of proposed model. The proposed MWTCNNet achieved an accuracy, sensitivity, and specificity of 98.9%, 99.03%, and 98.66%, respectively, using the CAP database, and 99.03%, 99.20%, and 98.87%, respectively, with the SDRC database. Our proposed model performs better than existing state-of-the-art models and can be tested on a vast, diverse database before being installed for clinical application.
充足的睡眠对健康生活至关重要,否则可能导致呼吸暂停、嗜睡症、失眠和周期性腿部运动等睡眠障碍。多导睡眠图(PSG)通常用于分析睡眠和识别不同的睡眠障碍。本研究提出了一种基于卷积神经网络(CNN)的新型失眠检测技术,使用单通道脑电图(EEG)信号代替复杂的 PSG。该方法利用基于莫里特小波的连续小波变换和平滑伪维格纳-维尔分布(SPWVD)来获取持续时间为 1 秒的脑电信号的扫描图,并利用卷积层进行特征提取和图像分类。我们发现 Morlet 变换是一种更好的时频分布。我们利用循环交替模式(CAP)和睡眠障碍研究中心(SDRC)数据库以及 C4-A1 单通道脑电图推导,开发了基于莫列特小波的 CNN(MWTCNNet),用于对健康和失眠患者进行分类。我们使用 CAP 和 SDRC 数据库的多个队列/设置来分析拟议模型的性能。在使用 CAP 数据库时,提议的 MWTCNNet 的准确度、灵敏度和特异度分别达到了 98.9%、99.03% 和 98.66%;在使用 SDRC 数据库时,准确度、灵敏度和特异度分别达到了 99.03%、99.20% 和 98.87%。我们提出的模型比现有的最先进模型表现更好,可以在大量不同的数据库中进行测试,然后再安装到临床应用中。
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引用次数: 0
Table of Contents March 2024 目录 2024 年 3 月
IF 1.3 4区 工程技术 Q3 Computer Science Pub Date : 2024-02-09 DOI: 10.1109/TLA.2024.10431417
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引用次数: 0
Evaluation of Solar Panel Bandwidth for RGB Channels in Visible Light Communication 评估可见光通信中 RGB 信道的太阳能电池板带宽
IF 1.3 4区 工程技术 Q3 Computer Science Pub Date : 2024-02-09 DOI: 10.1109/TLA.2024.10431426
Roger Martinez;Francisco Eugenio Lopez Giraldo;Jose Martin Luna Rivera;Juan David Navarro Restrepo;Juan David Rojas Usuga
Visible light communication (VLC) is an emerging technology that uses white light-emitting diodes (LEDs) to transmit information and provide illumination simultaneously. Recently, solar panels have been proposed as optical detectors at the receiver to retrieve data from light signals. However, very few studies have addressed the behavior of the solar panel bandwidth at different wavelengths. In this paper, we propose the design of a low-complexity VLC system with a red-green-blue (RGB) LED transmitter and a solar panel receiver whose bandwidth is modified using a parallel load resistor. We define a set of experiments to validate the performance of the VLC system using an RGB LED source and a solar panel as the optical receiver. The VLC systems performance is evaluated across various baud rates (4800, 9600, 19200, 38400, 57600, and 115200 bits/s) at a free space transmission distance of less than 105 cm. Our measurements indicate that the solar panels highest bandwidth is achieved with the red channel, yielding a maximum data rate of 57600 bits/s at a bit error rate (BER) of 5 103. These results are analyzed and discussed to highlight the benefits and limitations of using solar panels for VLC purposes.
可见光通信(VLC)是一种利用白色发光二极管(LED)同时传输信息和提供照明的新兴技术。最近,有人提出将太阳能电池板作为接收器的光学探测器,从光信号中获取数据。然而,很少有研究涉及太阳能电池板带宽在不同波长下的行为。在本文中,我们提出了一种低复杂度 VLC 系统的设计方案,该系统包含一个红-绿-蓝(RGB)LED 发射器和一个太阳能电池板接收器,其带宽可通过并联负载电阻进行修改。我们定义了一组实验,以验证使用 RGB LED 光源和太阳能电池板作为光学接收器的 VLC 系统的性能。我们在小于 105 厘米的自由空间传输距离内,通过不同的波特率(4800、9600、19200、38400、57600 和 115200 比特/秒)对 VLC 系统的性能进行了评估。我们的测量结果表明,太阳能电池板的最高带宽是通过红色信道实现的,在误码率(BER)为 5 103 的情况下,最大数据传输速率为 57600 比特/秒。我们对这些结果进行了分析和讨论,以强调将太阳能电池板用于 VLC 的好处和局限性。
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引用次数: 0
Novelty detection algorithms to help identify abnormal activities in the daily lives of elderly people 新奇事物检测算法帮助识别老年人日常生活中的异常活动
IF 1.3 4区 工程技术 Q3 Computer Science Pub Date : 2024-02-09 DOI: 10.1109/TLA.2024.10431423
Anita Fernandes;Valderi Leithardt;Juan Francisco Santana
The populations life expectancy is increasing, and this scenario will bring challenges to be faced in the coming decades to provide healthy and inclusive aging. At this stage of life, several common health conditions, chronic illnesses, and disabilities affect the individuals physical and mental health and prevent him from carrying out Activities of Daily Living. In this context, this article presents a comparative study between some Machine Learning algorithms used to identify behavioral abnormalities based on ADL (Activities of Daily Living), through the Novelty Detection technique. ADL data were used to create a model that defines the baseline behavior of an elderly person, and new observations, to verify significant changes in behavior, are classified as outliers or abnormal. The Local Outlier Factor, One-class Support Vector Machine, Robust Covariance, and Isolation Forest algorithms were analyzed, and the Local Outlier Factor obtained the best result, reaching a precision and F1-Score of 96%.
人口的预期寿命在不断延长,这种情况将给未来几十年提供健康和包容的老龄化带来挑战。在人生的这一阶段,一些常见的健康状况、慢性疾病和残疾会影响个人的身心健康,使其无法进行日常生活活动。在此背景下,本文通过新颖性检测技术,对一些用于识别基于 ADL(日常生活活动)的行为异常的机器学习算法进行了比较研究。ADL 数据被用来创建一个定义老年人基线行为的模型,而新的观察结果则被归类为异常值或异常行为,以验证行为的显著变化。对本地离群因子、单类支持向量机、鲁棒性协方差和隔离森林算法进行了分析,本地离群因子取得了最佳结果,精确度和 F1 分数均达到 96%。
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引用次数: 0
Automatic Modulation Classification for low-power IoT applications 针对低功耗物联网应用的自动调制分类
IF 1.3 4区 工程技术 Q3 Computer Science Pub Date : 2024-02-09 DOI: 10.1109/TLA.2024.10431424
Yasmin R. Mondino-Llermanos;Graciela Corral-Briones
The Internet of Things (IoT) has swiftly become one of the most important technologies in recent years. Radio spectrum access represents a stern challenge for the IoT as a consequence of the increased use of connected devices. This is particularly true for IoT devices operating in the unlicensed band where the huge demand for wireless connectivity will require techniques that use the spectrum efficiently. Avoiding training sequences enables a more efficient spectrum usage and has the additional advantage of reducing the power consumption of IoT devices, but it requires modulation identification mechanisms. This paper presents a simple yet efficient method to classify received signals according to their modulation type. We propose the application of a single hidden layer neural network with a small number of trainable parameters for performing the classification between seven different modulation types. The designed classifier achieves a maximum accuracy of 95% when the signal-to-noise ratio (SNR) of the input data is 12 dB, and in the presence of multi-path fading, sample rate offset and carrier frequency offset.
物联网(IoT)已迅速成为近年来最重要的技术之一。由于联网设备的使用越来越多,无线频谱接入成为物联网面临的严峻挑战。这对于在非授权频段运行的物联网设备来说尤为如此,因为对无线连接的巨大需求需要高效利用频谱的技术。避免训练序列可以更有效地利用频谱,并具有降低物联网设备功耗的额外优势,但这需要调制识别机制。本文提出了一种根据调制类型对接收信号进行分类的简单而高效的方法。我们建议应用具有少量可训练参数的单隐层神经网络,对七种不同的调制类型进行分类。当输入数据的信噪比(SNR)为 12 dB,且存在多路径衰减、采样率偏移和载波频率偏移时,所设计的分类器的最高准确率可达 95%。
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引用次数: 0
A Comparison Study of Depth Map Estimation in Indoor Environments Using pix2pix and CycleGAN 使用 pix2pix 和 CycleGAN 进行室内环境深度图估算的比较研究
IF 1.3 4区 工程技术 Q3 Computer Science Pub Date : 2024-02-09 DOI: 10.1109/TLA.2024.10431422
Ricardo Salvino Casado;Emerson Carlos Pedrino
This article presents a Deep Learning-based approach for comparing automatic depth map estimation in indoor environments, with the aim of using them in navigation aid systems for visually impaired individuals. Depth map estimation is a laborious process, as most high-precision systems consist of complex stereo vision systems. The methodology utilizes Generative Adversarial Networks (GANs) techniques for generating depth maps from single RGB images. The study introduces methods for generating depth maps using pix2pix and CycleGAN. The major challenges still lie in the need to use large datasets, which are coupled with long training times. Additionally, a comparison of L1 Loss with a variation of the MonoDepth2 and DenseDepth systems was performed, using ResNet50 and ResNet18 as encoders, which are mentioned in this work, for comparison and validation of the presented method. The results demonstrate that CycleGAN is capable of generating more reliable maps compared to pix2pix and DepthNetResNet50, with an L1 Loss approximately 2,5 times smaller than pix2pix, approximately 2,4 times smaller than DepthNetResNet50, and approximately 14 times smaller than DepthNetResNet18.
本文介绍了一种基于深度学习的方法,用于比较室内环境中的自动深度图估算,目的是将其用于视障人士的导航辅助系统。深度图估算是一个费力的过程,因为大多数高精度系统都由复杂的立体视觉系统组成。该方法利用生成对抗网络(GANs)技术从单个 RGB 图像生成深度图。研究介绍了使用 pix2pix 和 CycleGAN 生成深度图的方法。主要的挑战仍然在于需要使用大型数据集,而且训练时间较长。此外,还使用 ResNet50 和 ResNet18 作为编码器,对 L1 Loss 与 MonoDepth2 和 DenseDepth 系统的变体进行了比较,以比较和验证所提出的方法。结果表明,与 pix2pix 和 DepthNetResNet50 相比,CycleGAN 能够生成更可靠的地图,其 L1 损失比 pix2pix 小约 2.5 倍,比 DepthNetResNet50 小约 2.4 倍,比 DepthNetResNet18 小约 14 倍。
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引用次数: 0
Optimal Control and Grasping for a Robotic Hand with a Non-linked Double Tendon Arrangement 采用非链接双肌腱排列的机器人手的最佳控制和抓取功能
IF 1.3 4区 工程技术 Q3 Computer Science Pub Date : 2024-02-09 DOI: 10.1109/TLA.2024.10431547
Erick J. Sánchez-Garnica;Liliam Rodríguez-Guerrero;Rocío Ortega-Palacios;Omar Jacobo Santos-Sánchez
After comparing different robotic hand projects, a problem is identified: when a finger has a degree of freedom, the hand is unable to grasp irregularly shaped objects. This article proposes a solution. The use of a non-linked doubletendon arrangement in the fingers allows them to have free movement; coupled with the use of Inertial Measurement Units to determine its position, ensures that, despite having one degree of freedom per finger, the hand can effectively grasp irregular objects. Additionally, a web application is developed to control hand movements through voice commands. Finally, due to the necessity for these types of devices to be mobile, an optimal control law is used to minimize energy consumption, thereby increasing autonomy when the hand is powered by batteries. As an additional note, the conducted experiments reveal that the movement of all fingers occurs simultaneously, demonstrating that parallel multitasking programming techniques effectively fulfill that purpose.
在对不同的机器手项目进行比较后,我们发现了一个问题:当手指具有自由度时,机器手无法抓取形状不规则的物体。本文提出了一种解决方案。在手指上使用非链接双腱排列,使它们能够自由移动;再加上使用惯性测量单元来确定其位置,确保了尽管每个手指只有一个自由度,但这只手能够有效地抓取不规则物体。此外,还开发了一个网络应用程序,通过语音指令控制手的动作。最后,由于这类设备必须具有移动性,因此采用了最优控制法则,以最大限度地降低能耗,从而提高手部在使用电池供电时的自主性。另外,实验表明,所有手指的运动都是同时进行的,这证明并行多任务编程技术能有效实现这一目的。
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引用次数: 0
Assessing Human Settlement Sprawl in Mexico via Remote Sensing and Deep Learning 通过遥感和深度学习评估墨西哥的人类居住区扩张情况
IF 1.3 4区 工程技术 Q3 Computer Science Pub Date : 2024-02-09 DOI: 10.1109/TLA.2024.10431421
Antonio Briseño Montes;Joaquin Salas;Elio Atenogenes Villaseñor Garcia;Ranyart Rodrigo Suarez;Danielle Wood
Understanding human settlements' geographic location and extent can support decision-making in resource distribution, urban growth policies, and natural resource protection. This research presents an approach to assess human settlement sprawl using labeled multispectral satellite image patches and Convolutional Neural Networks (CNN). By training deep learning classifiers with a dataset of 5,359,442 records consisting of satellite images and census data from 2010, we evaluate sprawl for settlements across the country. The study focuses on major cities in Mexico, comparing ground truth results for 2015 and 2020. EfficientNet-B7 achieved the best performance with a ROC AUC of 0.970 and a PR AUC of 0.972 among various CNN architectures evaluated. To evaluate human settlement sprawl, we introduce an information-based metric that offers advantages over entropy-based alternatives.
了解人类定居点的地理位置和范围有助于资源分配、城市发展政策和自然资源保护方面的决策。本研究提出了一种利用标记的多光谱卫星图像斑块和卷积神经网络(CNN)评估人类住区无计划扩展的方法。通过使用由 2010 年卫星图像和人口普查数据组成的 5359442 条记录的数据集对深度学习分类器进行训练,我们对全国范围内的定居点无计划扩展情况进行了评估。研究重点是墨西哥的主要城市,比较了 2015 年和 2020 年的地面实况结果。在所评估的各种 CNN 架构中,EfficientNet-B7 的 ROC AUC 为 0.970,PR AUC 为 0.972,表现最佳。为了评估人类居住区的蔓延情况,我们引入了一种基于信息的度量方法,它比基于熵的其他方法更具优势。
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引用次数: 0
Navigation of mobile robots using neural networks and genetic algorithms 利用神经网络和遗传算法实现移动机器人导航
IF 1.3 4区 工程技术 Q3 Computer Science Pub Date : 2024-01-23 DOI: 10.1109/TLA.2024.10412033
David Abad Perez;Basil Mohammed Al-Hadithi;Victor Cadix Martin
The navigation of robots has been a subject of widespread interest over the last few decades. In the previous years, traditional methods based on mathematical equations were used, and there has been an evolution towards the use of methods based on artificial intelligence. Two of which have been used in this work: neural networks and genetic algorithms. Neural networks are used as a machine learning model to teach the robot to move from any starting point to a goal, avoiding obstacles along the way. However, this model needs an algorithm to learn how to carry out this activity, which is what the genetic algorithm will be used for. Furthermore, this method of navigation will be compared with the traditional method based on potential fields, where it can be observed how this new method based on artificial intelligence improves and solves some typical problems of the old methods, such as the tendency to get stuck in local minima.
过去几十年来,机器人导航一直是人们广泛关注的话题。前些年,人们使用基于数学公式的传统方法,而现在则开始使用基于人工智能的方法。本研究采用了其中两种方法:神经网络和遗传算法。神经网络被用作一种机器学习模型,教机器人从任意起点向目标移动,并避开沿途的障碍物。不过,这种模型需要一种算法来学习如何开展这项活动,这就是遗传算法的用途。此外,还将把这种导航方法与基于势场的传统方法进行比较,观察这种基于人工智能的新方法如何改进和解决旧方法的一些典型问题,例如容易陷入局部最小值的问题。
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引用次数: 0
Design and Comparative Analysis of THz Antenna through Machine Learning for 6G Connectivity 通过机器学习设计和比较分析用于 6G 连接的太赫兹天线
IF 1.3 4区 工程技术 Q3 Computer Science Pub Date : 2024-01-23 DOI: 10.1109/TLA.2024.10412032
Rachit Jain;Vandana Vikas Thakare;Pramod Kumar Singhal
The rise of sixth-generation (6G) technology has become increasingly necessary to meet the growing demand for high-speed internet and the continuous advancements in technology. The development of an optimal antenna design is crucial to attain the required performance and capabilities. Traditional electromagnetic modeling approaches for antenna design are, however, time-consuming and computationally intensive requiring long simulation time and high-end computing systems. Therefore, Machine Learning (ML) technology can be utilized to deal with these limitations in the context of Terahertz (THz) antenna design, which has not been done before. The main objective of this work is to develop an antenna that operates in the THz Band, which is the essential 6G band for the future infrastructure revolution, and to predict and optimize the antenna's return loss using ML models like K-Nearest Neighbour (KNN), Extreme Gradient Boosting (XG-Boost), Decision Tree, and Random Forest and Mean Squared Error (MSE) of 3.816. The findings show that all of these models perform accurately, particularly Random Forest having the highest accuracy of 82% in predicting the return loss. ML offers novel possibilities for the development of optimized and efficient 6G antennas for high-speed communication.
为了满足人们对高速互联网日益增长的需求和技术的不断进步,第六代(6G)技术的兴起变得越来越有必要。要达到所需的性能和功能,开发最佳天线设计至关重要。然而,传统的天线设计电磁建模方法耗时且计算密集,需要较长的仿真时间和高端计算系统。因此,在太赫兹(THz)天线设计中,可以利用机器学习(ML)技术来解决这些限制,这在以前还没有过。这项工作的主要目标是开发一种工作在太赫兹频段(未来基础设施革命中必不可少的 6G 频段)的天线,并使用 K-Nearest Neighbour (KNN)、Extreme Gradient Boosting (XG-Boost)、Decision Tree 和 Random Forest 等 ML 模型预测和优化天线的回波损耗,平均平方误差 (MSE) 为 3.816。研究结果表明,所有这些模型都表现准确,尤其是随机森林预测回波损耗的准确率最高,达到 82%。ML 为开发优化、高效的 6G 高速通信天线提供了新的可能性。
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引用次数: 0
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IEEE Latin America Transactions
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