检索结果-内蒙古大学图书馆

EEG emotion recognition framework based on invariant wavelet scattering convolution network

Journal of Ambient Intelligence and Humanized Computing 2024年第4期15卷 2181-2199页

作者： Elrefaiy, Ahmed Tawfik, Nahed Zayed, Nourhan Elhenawy, Ibrahim Department of Computer Science Faculty of Computers and Informatics Zagazig University Zagazig44519 Egypt Computers and Systems Department Electronics Research Institute Cairo Egypt Mechanical Engineering Department The British University in Egypt Cairo Egypt

EEG signals for real-time emotion identification are crucial for affective computing and human-computer interaction. The current emotion recognition models, which rely on a small number of emotion classes and stimuli like music and images in controlled lab conditions, have poor ecological validity. Furthermore, identifying relevant EEG signal features is crucial for efficient emotion identification. According to the complexity, non-stationarity, and variation nature of EEG signals, which make it challenging to identify relevant features to categorize and identify emotions, a novel approach for feature extraction and classification concerning EEG signals is suggested based on invariant wavelet scattering transform (WST) and support vector machine algorithm (SVM). The WST is a new time-frequency domain equivalent to a deep convolutional network. It produces scattering feature matrix representations that are stable against time-warping deformations, noise-resistant, and time-shift invariant existing in EEG signals. So, small, difficult-to-measure variations in the amplitude and duration of EEG signals can be captured. As a result, it addresses the limitations of the previous feature extraction approaches, which are unstable and sensitive to time-shift variations. In this paper, the zero, first, and second order features from DEAP datasets are obtained by performing the WST with two deep layers. Then, the PCA method is used for dimensionality reduction. Finally, the extracted features are fed as inputs for different classifiers. In the classification step, the SVM classifier is utilized with different classification algorithms such as k-nearest neighbours (KNN), random forest (RF), and AdaBoost classifier. This research employs a principal component analysis (PCA) approach to reduce the high dimensionality of scattering characteristics and increase the computational efficiency of our classifiers. The proposed method is performed across four different emotional classific

关键词： Support vector machines

来源：评论

学校读者我要写书评

暂无评论

Reception of Terrestrial DAB+ and FM Radio with a Mobile Device: A Subjective Quality Evaluation 19th

Reception of Terrestrial DAB+ and FM Radio with a Mobile Dev...

引用

19th EAI International Conference on Mobile and Ubiquitous Systems: Computing, Networking and Services, MobiQuitous 2022

作者： Falkowski-Gilski, Przemyslaw Faculty of Electronics Telecommunications and Informatics Gdansk University of Technology Narutowicza 11/12 Gdansk80-233 Poland

ISBN: (纸本)9783031347757

Nowadays, terrestrial broadcasting enables to receive content anytime and everywhere. People can obtain information both with a portable or desktop receiver, which include pocket-sized devices as well as high-end Hi-Fi equipment, not to mention car audio systems. Numerous manufacturers include FM-compatible chipsets in a variety of user equipment (UE), including mobile phones. However, digital radio signal processing modules, such as, i.e., Digital Audio Broadcasting plus (DAB+), are not that popular. Currently, only one smartphone available on the market offers such possibilities This paper examines the reception quality of terrestrial digital DAB+ and analog FM radio with the use of a mobile device. The study was carried out on a number of broadcasts simulcasted in both standards, and involved a group of 30 listeners aged between 20–25 years old. Next, results were compared with subjective scores obtained using a high-end desktop radio receiver. The aim of this work is to determine whether small size mobile UE can offer high-quality reception, and whether a smartphone can compete with a traditional indoor receiver. Results of carried out studies may aid and inspire devices manufacturers as well as content and service providers, speeding up the whole digitization process. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Digital radio

来源：评论

学校读者我要写书评

暂无评论

Detection and Analysis of Motricity and Somato-Functional Indices of 3X3 Basketball Players to Customize Sports Training 15

Detection and Analysis of Motricity and Somato-Functional In...

引用

15th International Conference on electronics, Computers and Artificial Intelligence, ECAI 2023

作者： Oproescu, Mihai Mihaila, Ion Bizon, Nicu Tudosoiu, Dumitru Gabriel Iana, Vasile Julien Fleancu, Leonard Cojanu, Florin Potop, Vladimir Mihai, Ilie Corina Popescu, Daniela University of Pitesti Faculty of Electronics Communication and Computer Science Pitesti Romania University of Pitesti Faculty of Sciences Physical Education and Informatics Pitesti Romania

ISBN: (纸本)9798350321388

In the game of basketball in general and in the game of 3x3 basketball, the emphasis is on general physical training and not on specific training, thus allowing the players to have a multilateral training. In order to facilitate the players' positional specialization, the paper aims to improve the body's main functions, allowing adaptation to effort and, at the same time, optimizing athletes' performances. The research that represents the premises of this paper is based on motricity, somato-functional and medical evidence and aims to identify, using predictive and corrective techniques with artificial intelligence (AI), the factors that contribute to the development of an adaptive sports training model for basketball players 3X3. Thus, the goal is to optimize the performance of 3X3 basketball players. By adapting the acquisition of somato-functional and motricity indices respectively, the training model can be applied in other individual or team sports. © 2023 IEEE.

关键词： Software design

来源：评论

学校读者我要写书评

暂无评论

Compact Self-Diplexing MIMO Antenna With Improved Isolation for IoT Connectivity

引用

IEEE Antennas and Wireless Propagation Letters 2025年第6期24卷 1492-1496页

作者： Munusami, Cholavendan Venkatesan, Rajeshkumar Pradhan, Nrusingha Charan Koziel, Slawomir Vellore Institute of Technology Department of Communication Engineering School of Electronics Engineering Vellore632014 India Central University of Karnataka Department of Electronics and Communication Engineering School of Engineering Kalaburagi585367 India Reykjavik University Department of Engineering Reykjavik102 Iceland Gdansk University of Technology Faculty of Electronics Telecommunications and Informatics Gdansk80-233 Poland

This letter proposes a cavity-backed substrate-integrated-waveguide dual-feed self-diplexing multiple-input–multiple-output (MIMO) antenna for Internet of Things applications. To implement a self-diplexing operation, the half-mode substrate-integrated waveguide (SIW) cavity is loaded with a rectangular slot carved on the top metal cladding. This causes the cavity to be divided into two unequal apertures, resulting in the development of a quarter-mode SIW. The patch has orthogonally positioned feed lines that provide two distinct resonant frequencies, 5.18 GHz and 5.8 GHz, with respect to the fundamental mode TE110. Employing metallic vias on the cavity improves the self-isolation between the orthogonal ports. Furthermore, a square aperture between orthogonal patches can achieve maximum isolation without additional units. The proposed compact MIMO antenna with a self-diplexing feature using an aperture slot achieves maximum isolation of 46.84 dB at 5.17 GHz and 42.76 dB at 5.8 GHz between patches, interport isolation of 28.6 dB at fL and 27.6 dB at fH among ports, an impedance bandwidth of 130 MHz (5.236 GHz to 5.106 GHz) and 174 MHz (5.88 GHz to 5.72 GHz), and high gain of 4.5 dBi, and 5.46 dBi was achieved at 5.17 GHz and 5.8 GHz, respectively. In addition, the MIMO antenna’s performance metrics are envelope correlation coefficient (ECC) 9.9 dB was assessed. The proposed MIMO antenna’s performance is evaluated through full-wave electromagnetic (EM) analysis and physical measurements of the fabricated prototype. © 2002-2011 IEEE.

关键词： Substrate integrated waveguides

来源：评论

学校读者我要写书评

暂无评论

Low-Frequency Dielectric Tests of PLA/Flax Sustainable and Degradable PCB Substrates 30

Low-Frequency Dielectric Tests of PLA/Flax Sustainable and D...

引用

30th IEEE International Symposium for Design and Technology in Electronic Packaging, SIITME 2024

作者： Geczy, Attila Krammer, Oliver Tamus, Zoltan Adam Csiszar, Andras Budapest University of Technology and Economics Faculty of Electrical Engineering and Informatics Department of Electronics Technology Budapest Hungary Budapest University of Technology and Economics Faculty of Electrical Engineering and Informatics Department of Electric Power Engineering Budapest Hungary Meshlin Composites Zrt. Gyor Hungary

ISBN: (纸本)9798331539511

To pursue a move towards sustainability in electronics manufacturing, recently we presented a biodegradable printed circuit board (PCB) alternative substrate, where polylactic-Acid (PLA) and flax-Textile reinforcement forms a composite with flame retardancy. The novel PLA/Flax substrate is capable of being a core material for double-sided PCB designs. This paper investigates into the lowfrequency (1 Hz-500 kHz) dielectric capabilities of the substrates with Omicron Dirana dielectric spectrometer and Wayne-Kerr 6430A impedance analyzer. For the experimental, two generations of one-sided substrates were measured, where the top side was covered with 35 \mu m Cu layer with PLA foil and polypropylene (PP) foil (A and B groups consequentially) serving as bonding layer between the composite and the Cu. It was found that The PLA/Flax substrates have high permittivity values at low frequencies, while at high frequencies, the permittivity is lower than that of the most commonly used FR4. Moreover, the additional PP layer caused a further increase in the relative permittivity. The tan δ of PLA/PLA samples was higher over the investigated frequency range. This high value of relative permittivity and dielectric loss at low frequency is connected to interfacial polarization originated from the structure of PLA/Flax samples. A local peak of tan δ was observed at 500 Hz on PLA/Flax samples indicating the presence of orientation polarization. © 2024 IEEE.

关键词： Permittivity

来源：评论

学校读者我要写书评

暂无评论

Effect of TiO2Nanoparticles Addition on the Electrochemical Migration of Low-Silver Lead-Free SAC Alloys 46

Effect of TiO2Nanoparticles Addition on the Electrochemical ...

引用

46th International Spring Seminar on electronics Technology, ISSE 2023

作者： Gharaibeh, Ali Rigler, Dániel Medgyes, Bálint Budapest University of Technology and Informatics Budapest Faculty of Electrical Engineering and Informatics Department of Electronics Technology Muegyetem rkp. 3. BudapestH-1111 Hungary

ISBN: (纸本)9798350334845

The effect of the doping of TiO2 nanoparticles on the electrochemical migration (ECM) characteristics of low-Ag lead-free SAC0807 solder alloy was examined by the means of water drop (WD) tests in 0.1 M NaCl solution at 10 VDC bias voltage. The statistical and reliability analysis of WD results revealed that for both alloys, the lifetime results follow a clearly defined log-normal distribution. SAC0807+0.1%TiO2 showed a higher median time to failure (T50) than SAC0807 suggesting an advantageous effect of incorporating TiO2 nanoparticles onto SAC0807 from the ECM point of view. However, based on statistical and reliability analysis of WD results, this advantageous effect is not enough to consider doping with TiO2 nanoparticles promising. Scanning electron microscopy (SEM) showed a change in the morphology of the dendrites between SAC0807 and SAC0807+0.1%TiO2 where the former showed straight and perpendicularly branched morphology while the latter showed a mixture of the trunk and lace-type morphology. Energy dispersive spectroscopy (EDS) confirmed that Sn was the principal detected element in the dendrites in both cases. © 2023 IEEE.

关键词： Titanium dioxide

来源：评论

学校读者我要写书评

暂无评论

End-to-End Learning System for Symbol Decoding in Optical Communication 12

End-to-End Learning System for Symbol Decoding in Optical Co...

引用

12th IEEE International Conference on Intelligent Systems, IS 2024

作者： Neves, Manuel S. Loureiro, Pedro A. Slavov, Tsonyo Georgieva, Petia University of Aveiro Dep. of Electronics Telecom. and Informatics Aveiro Portugal Technical University of Sofia Faculty of Automatics Sofia Bulgaria Instituto de Telecomunicações Campus Universitário de Santiago Dep. of Electronics Telecom. and Informatics Aveiro Portugal

ISBN: (纸本)9798350350982

In this paper we propose an autoencoder-based End-to-End (E2E) Deep Learning for symbol decoding in fiber optical communications systems. The autoencoder was trained with data encoded in two different ways. First, one-hot encoding which corresponds to the most common approach to train the network in order to optimize the decision regions of each symbol. Then, we introduce the binary coding where the bit sequences that represent the symbols, are positioned in such a way to minimize the error and compensate the distortions introduced by the optical channel. The focus of the study are the generated constellations, symbol decision regions and symbol bit labeling. The autoencoder contributes to better visualization and analysis of the resulting decision regions for scenarios with high and low nonlinearities. It improves the interpretability of the symbol decoding. To the best of our knowledge, this is the first time when a ML-based approach (i.e the autoencoder) estimates not only the ideal locations of the decoded symbols in various constellations (4, 16, 64) but also optimizes the geometrical decision regions of the symbols in the constellation. © 2024 IEEE.

关键词： Decoding

来源：评论

学校读者我要写书评

暂无评论

Survey of Asynchronous Radiolocation Methods

引用

IEEE Access 2025年 13卷 85613-85640页

作者： Stefanski, Jacek Sadowski, Jaroslaw Gdansk University of Technology Faculty of Electronics Telecommunications and Informatics Gdansk80-233 Poland

This publication reviews asynchronous radiolocation methods, emphasizing their analytical descriptions. Radiolocation systems evolve through the integration of advancements from multiple scientific disciplines, including telecommunications, computer science, electronics, and digital signal processing, making them inherently interdisciplinary. Most existing literature focuses on radiolocation systems with synchronized reference stations, supported by theoretical analyses and experimental studies. In contrast, asynchronous systems are less explored. Synchronous systems are preferred for their high measurement accuracy, achieved by providing a common time reference for the main components involved in measuring the radio signal parameters that are related to the position of mobile devices. However, a loss of synchronization or a failure of primary reference stations can prevent object localization, underscoring the need for asynchronous methods as standalone or backup solutions. Additionally, asynchronous approaches allow the integration of multiple independent radiolocation networks, enhancing the efficiency of the localization process. To address this gap, the authors systematized the current knowledge on asynchronous radiolocation methods, which can help researchers to understand this topic and choose appropriate position estimation methods for various applications, taking into account the limitations caused by network or mobile device design. The paper also highlights key asynchronous radiolocation solutions that have been practically implemented, demonstrating their potential and effectiveness in real-world scenarios. © 2013 IEEE.

关键词： Wireless sensor networks

来源：评论

学校读者我要写书评

暂无评论

Trains Detection Using LTE Downlink Reference Signals

引用

IEEE Access 2025年 13卷 95054-95067页

作者： Olga Blaszkiewicz Krzysztof K. Cwalina Alicja Olejniczak Piotr Rajchowski Jaroslaw Sadowski Faculty of Electronics Telecommunications and Informatics Gdańsk University of Technology Gdańsk Poland

In this article a method for detecting the presence of trains on tracks by analyzing the changes in the cell-specific reference symbols parameters in the downlink signal from nearby LTE base station operating in transmit diversity mode is proposed. The signal processing method to obtain waveforms showing correlation with the presence of trains is described with experimental results on trains detection using real LTE downlink signals from commercial networks. The main outcome of the investigation is that even in case of signal reception using receiver with limited long term stability, which doesn’t allow to track absolute phase values of reference symbols, difference between received phases of symbols transmitted using different antenna ports in base station may be highly correlated with presence of trains on tracks. Proposed reference symbols analysis may be alternative to detection of objects in the environment using bistatic passive radar principle, which couldn’t be used in proposed measurement setup due to low performance of bistatic radar detection using single antenna receiver.

关键词： OFDM Passive radar Long Term Evolution Radar tracking Downlink Automobiles Symbols Receiving antennas Radio transmitters Base stations

来源：评论

学校读者我要写书评

暂无评论

Usability Issues With Mobile Applications: Insights From Practitioners and Future Research Directions

引用

IEEE Access 2025年 13卷 91301-91311页

作者： Weichbroth, Pawel Gdansk University of Technology Faculty of Electronics Telecommunications and Informatics Gdansk80-233 Poland

This study is motivated by two key considerations: the significant benefits mobile applications offer individuals and businesses, and the limited empirical research on usability challenges. To address this gap, we conducted structured interviews with twelve experts to identify common usability issues. Our findings highlight the top five concerns related to: information architecture, user interface design, performance, interaction patterns, and aesthetics. In addition, we identify five key directions for future research: usability in AI-powered mobile applications, augmented reality (AR) and virtual reality (VR), multimodal interactions, personalized mobile ecosystems, and accessibility. Our study provides insights into emerging usability challenges and trends, contributing to both the theory and practice of mobile human-computer interaction. © 2013 IEEE.

关键词： Usability engineering

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：