检索结果-内蒙古大学图书馆

Bad channel detection in EEG recordings

Current Directions in Biomedical engineering 2022年第2期8卷 257-260页

作者： Komosar, Milana Fiedler, Patrique Haueisen, Jens Institute of Biomedical Engineering and Informatics Faculty of Computer Sciences and Automation Technische Universität Ilmenau Ilmenau Germany

Electroencephalography (EEG) is widely used in clinical applications and basic research. Dry EEG opened the application area to new fields like self-application during gaming and neurofeedback. While recording, the signals are always affected by artefacts. Manual detection of bad channels is the gold standard in both gel-based and dry EEG but is time-consuming. We propose a simple and robust method for automatic bad channel detection in EEG. Our method is based on the iterative calculation of standard deviations for each channel. Statistical measures of these standard deviations serve as indications for bad channel detection. We compare the new method to the results obtained from the manually identified bad channels for EEG recordings. We analysed EEG signals during resting state with eyes closed and datasets with head movement. The results showed an accuracy of 99.69 % for both gel-based and dry EEG for resting state EEG. The accuracy of our new method is 99.38 % for datasets with the head movement for both setups. There was no significant difference between the manual gold standard of bad channel identification and our iterative standard deviation method. Therefore, the proposed iterative standard deviation method can be used for bad channel detection in resting state and movement EEG recordings. © 2022 The Author(s), published by De Gruyter.

关键词： Electroencephalography

来源：评论

学校读者我要写书评

暂无评论

Novel replaceable EEG electrode system

引用

Current Directions in Biomedical engineering 2022年第2期8卷 249-252页

作者： Warsito, Indhika Fauzhan Fiedler, Patrique Komosar, Milana Haueisen, Jens Institute of Biomedical Engineering and Informatics Faculty of Computer Science and Automation Technische Universität Ilmenau Ilmenau Germany

Due to the direct contact between electrode and scalp, dry EEG electrodes are exposed to increased mechanical wear compared to conventional gel-based electrodes. However, state-of-the-art commercial cap systems commonly use permanently fixated electrodes which can lead to downtime of the EEG cap during professional repair and replacement as well as reduced overall lifetime. An easily replaceable EEG electrode would furthermore improve hygiene, especially for newborn and infant applications. We propose a novel replaceable electrode system, consisting of an electrode holder, a snap top, a contact ring fixated inside the electrode holder, and a replaceable electrode. The production process consists of 3D printing, silicone molding, resin casting, and electroless plating. The replaceable electrode system is integrated into a multichannel EEG cap system. A verification study is conducted with 30 volunteers. The operators experienced that the new electrode holder eases adjustment of the electrode to have proper contact with the scalp. During the study, defective electrodes can be replaced without a soldering process. Furthermore, all electrodes stayed in the holder and did not fall off the cap for the whole session. In conclusion, the novel replaceable electrode system is suitable for EEG measurements. © 2022 The Author(s), published by De Gruyter.

关键词： Electroencephalography

来源：评论

学校读者我要写书评

暂无评论

Density-aware and Depth-aware Visual Representation for Zero-Shot Object Counting

Density-aware and Depth-aware Visual Representation for Zero...

引用

International Conference on Acoustics, Speech, and Signal Processing (ICASSP)

作者： Fang Nan Feng Tian Ni Zhang Nian Liu Haonan Miao Guang Dai Mengmeng Wang Faculty of Electronic and Information Engineering Xi’an Jiaotong University Xi’an China Ministry of Education Key Laboratory of Intelligent Networks and Network Security Xi’an Jiaotong University Xi’an China School of Automation Northwestern Polytechnical University Xi’an China Computer Vision Department Mohamed bin Zayed University of Artificial Intelligence Abu Dhabi UAE SGIT AI Lab State Grid Corporation of China Zhejiang University of Technology Hang Zhou China

ISBN: (数字)9798350368741

ISBN: (纸本)9798350368758

Previous methods often utilize CLIP semantic classifiers with class names for zero-shot object counting. However, they ignore crucial density and depth knowledge for counting tasks. Thus, we propose a density-aware and depth-aware prompt counting model, which captures density information via learning density-aware prompts based on density-aware contrastive loss and incorporates depth guidance with predefined depth-aware prompts. To facilitate the training process, we design two strategies for standard counting loss and the contrastive loss, where the former prioritizes larger and sparser objects initially, gradually focusing on smaller and denser objects, and the latter adopts coarse-to-fine density learning. Besides, we construct a dataset named LVIS-372 with more real-world scenarios and balanced instance distribution compared to existing ones. Finally, the experimental results demonstrate the effectiveness of our proposed method.

关键词： Training Visualization Semantics Focusing Signal processing Acoustics Power capacitors Speech processing Standards

来源：评论

学校读者我要写书评

暂无评论

MangoLeafXNet: An Explainable Deep Learning Model for Accurate Mango Leaf Disease Classification

引用

IEEE Access 2025年

作者： Rayed, Md Eshmam Jim, Jamin Rahman Islam, Md Juniadul Mridha, M.F. Kabir, Md Mohsin Hossen, Md. Jakir American International University-Bangladesh Department of Computer Science and Engineering Dhaka1229 Bangladesh Mälardalens University Division of Computer Science and Software Engineering Västerås722 20 Sweden Multimedia University Faculty of Engineering and Technology Department of Robotics and Automation Melaka Malaysia

Addressing the global challenge of ensuring a consistent and abundant supply of fresh fruit, particularly in the context of fruit crops, is hindered by the prevalence of plant diseases. These diseases directly impact the quality of fruits, leading to a decline in overall agricultural production. Mango leaf diseases pose significant threats to global mango production, necessitating accurate and efficient classification techniques for timely disease management. Our study focuses on introducing MangoLeafXNet, a customized Convolutional Neural Network (CNN) architecture specifically tailored for the classification of mango leaf diseases, along with a healthy class. Our proposed model comprises six layers optimized to capture intricate disease patterns, demonstrating superior performance compared with prevalent pre-trained models. The model is trained and evaluated on three publicly available datasets: MangoLeafBD (4000 images across 8 classes), MangoPest (16 pest classes including healthy leaves), and MLDID (3000 high-resolution images across 5 classes). Our model demonstrated exceptional classification performance, attaining 99.8% accuracy, 99.62% recall, 99.5% precision, and an F1-score of 99.56%. Further validation on the MangoPest dataset and the Mango Leaf Disease Identification Dataset (MLDID) resulted in accuracies of 96.31% and 96.33%, respectively, confirming the robustness and adaptability of MangoLeafXNet across different datasets. Additionally, we incorporate Explainable AI techniques, including GRAD-CAM, Saliency Map, and LIME to enhance the interpretability of our model. We deployed Gradio web interface to create an interactive interface that allows users to upload images of mango leaves and get real-time classification and validation results along with confidence scores. This contribution not only advances the state-of-the-art in mango leaf disease classification but also offers promising prospects for real-time disease diagnosis and precision agriculture

关键词： Fruits

来源：评论

学校读者我要写书评

暂无评论

Distributed Constrained Online Nonconvex Optimization with Compressed Communication

arXiv

引用

arXiv 2025年

作者： Zhang, Kunpeng Xu, Lei Yi, Xinlei Cao, Ming Johansson, Karl H. Chai, Tianyou Yang, Tao State Key Laboratory of Synthetical Automation for Process Industries Northeastern University Shenyang110819 China Department of Mechanical Engineering University of Victoria VictoriaBCV8W 2Y2 Canada Shanghai Institute of Intelligent Science and Technology National Key Laboratory of Autonomous Intelligent Unmanned Systems Frontiers Science Center for Intelligent Autonomous Systems Ministry of Education Shanghai201210 China Engineering and Technology Institute Groningen Faculty of Science and Engineering University of Groningen GroningenAG 9747 Netherlands Division of Decision and Control Systems School of Electrical Engineering and Computer Science KTH Royal Institute of Technology Sweden Digital Futures Stockholm10044 Sweden

This paper considers distributed online nonconvex optimization with time-varying inequality constraints over a network of agents. For a time-varying graph, we propose a distributed online primal–dual algorithm with compressed communication to efficiently utilize communication resources. We show that the proposed algorithm establishes an O(T max{1−θ1,θ1}) network regret bound and an O(T 1−θ1/2) network cumulative constraint violation bound, where T is the number of iterations and θ1 ∈ (0, 1) is a user-defined trade-off parameter. When Slater’s condition holds (i.e, there is a point that strictly satisfies the inequality constraints at all iterations), the network cumulative constraint violation bound is reduced to O(T 1−θ1). These bounds are comparable to the state-of-the-art results established by existing distributed online algorithms with perfect communication for distributed online convex optimization with (time-varying) inequality constraints. Finally, a simulation example is presented to validate the theoretical results. Copyright © 2025, The Authors. All rights reserved.

关键词： Convex optimization

来源：评论

学校读者我要写书评

暂无评论

Choosing characteristics of hardware-software systems for word intelligibility of speech scoring

Choosing characteristics of hardware-software systems for wo...

引用

8th International Forum on Strategic Technology, IFOST 2013

作者： Ivanov, Andrey Valerievich Trushin, Victor Aleksandrovich Novosibirsk State Technical University Faculty of Automation and Computer Engineering Russia

ISBN: (纸本)9781479909315

The article is about hardware and software systems, dedicated for word intelligibility of speech scoring. Following characteristics for procedure and equipment for word intelligibility of speech scoring are reviewed: width of frequency range, which is analyzed, its' frequency partition (bandpass filter choice), measured values' dynamic range, measurements' accuracy. Experiment was performed in order to determine the frequency range width required for analysis. According to experiment results optimal width of frequency range, required for correct discrete word intelligibility valuing, was chosen. Frequency range partitioning was researched. Partitioning is suggested to be rendered correspondingly to human acoustic organ sensitivity. Requirements of choice measuring equipment are suggested. Structural configuration of software and hardware systems are given, including alternative ADC mountings, uses of logarithmic preamp, analogue or software bandpass filter. © 2013 IEEE.

关键词： Bandpass filters

来源：评论

学校读者我要写书评

暂无评论

Robust Leader-Following Output Regulation of Uncertain Multi-Agent Systems With Time-Varying Delay

引用

IEEE/CAA Journal of Automatica Sinica 2018年第4期5卷 807-817页

作者： Ala Shariati Qing Zhao Automation&Control Research Group Faculty of Electrical and Computer EngineeringKhajeh Nasir Toosi University of TechnologyTehran ***Iran Department of Electrical and Computer Engineering at University of Alberta EdmontonAlberta T6R1Z6Canada

In this paper, the robust analysis and design of leader-following output regulation for multi-agent systems described by general linear models is given in presence of timevarying delay and model uncertainty. To this aim, a new regulation protocol for the closed-loop multi-agent system under a directed graph is proposed. An important specification of the proposed protocol is to guarantee the leader-following output regulation for uncertain multi-agent systems with both stable and unstable agents. Since many signals can be approximated by a combination of the stationary and ramp signals, the presented results work for adequate variety of the leaders. The analysis and design conditions are presented in terms of certain matrix inequalities. The method proposed can be used for both stationary and ramp leaders. Simulation results are presented to show the effectiveness of the proposed method.

关键词： Linear matrix inequality(LMI) multi-agent systems robust leader-following output regulation time-varying delay

来源：评论

学校读者我要写书评

暂无评论

An optimized shunt active power filter using the golden Jackal optimizer for power quality improvement

引用

Scientific Reports 2025年第1期15卷 1-13页

作者： Bakria, Derradji Laouid, Abdelkader Azzeddine Korich, Belkacem Beladel, Abdelkader Teta, Ali Mohammedi, Ridha Djamel Elsayed, Salah K. Ali, Enas Aeggegn, Dessalegn Bitew Ghoneim, Sherif S. M. Applied Automation and Industrial Diagnostics Laboratory LAADI Ziane Achour University of Djelfa PO Box 3117 Djelfa 17000 Algeria Department of Electrical Engineering LASER Lab Ziane Achour University of Djelfa PO Box 3117 Djelfa 17000 Algeria Department of Electrical Engineering College of Engineering Taif University Taif 21944 Saudi Arabia Centre for Research Impact & Outcome Chitkara University Institute of Engineering and Technology Chitkara University Punjab Rajpura 140401 India Faculty of Engineering and Technology Future University in Egypt New Cairo 11835 Egypt Department of Electrical and Computer Engineering Debre Markos University Debre Markos 269 Debre Markos Ethiopia

Integration of nonlinear loads in modern power systems has led to many issues arising mainly due to the generation of harmonic currents and the presence of reactive power, both having adverse effects on power quality and grid stability. Harmonic currents cause increased losses, overheating of equipment, and voltage distortions, while reactive power imbalances result in inefficiencies in power delivery and compromised system performance. To overcome these problems, a Shunt Active Power FIlter design and an optimal control strategy for harmonic mitigation and reactive power compensation are proposed in this paper. The design incorporates an optimized anti-windup PI controller for DC-link voltage regulation and an optimized output filter to enhance the quality of the injected current. This design is formulated as an optimization problem and solved using the Golden Jackal Optimizer. MATLAB/Simulink simulations validate the proposed method under different operating conditions, covering dynamic change of loads and unbalanced grid conditions. The result shows a remarkable reduction in Total Harmonic Distortion (THD) of grid current, and reactive power compensation meanwhile maintaining the stability of the grid. © The Author(s) 2025.

关键词： Current harmonics compensation Golden Jackal optimization Optimal control Power quality Shunt active power filter (SAPF)

来源：评论

学校读者我要写书评

暂无评论

Estimated acceleration feedback applied to a telescope servo system

引用

Mechatronics 1991年第4期1卷 509-523页

作者： Higginson, A.M. Sanders, S. Wallett, C. School of Industrial Automation Faculty of Engineering & Computer Technology Birmingham Polytechnic B42 2SU United Kingdom

Methods of increasing the bandwidth of a telescope servo system have been investigated. The results of this research, both via simulation and practical evaluation, have shown that the application of acceleration feedback can increase the position servo loop bandwidth by a factor of 4. Acceleration feedback has been applied successfully to the servo system of a real machine. This has been achieved both by the use of accelerometers and by software-based acceleration calculation and state estimation techniques. The performance of the software-based techniques matches that of the accelerometer if the sampling rate of the servo system is high enough. © 1991

关键词： Servomechanisms

来源：评论

学校读者我要写书评

暂无评论

Design and Application of a LiNbO 3 Reflective Power-Frequency Intensive Electric Field Sensors

引用

Sensors and Actuators A: Physical 2025年

作者： Shaoqi He Jiahong Zhang Jing Zhang Yingna Li Faculty of Information Engineering and Automation Kunming University of Science and Technology Kunming 650500 China Yunnan Key Laboratory of Computer Technology Applications Kunming University of Science and Technology Kunming 650500 China

A sensor with distinct reflected light paths, based on the Pockels Effect in LiNbO₃ crystals, has been developed to measure electric fields in the power-frequency range. The performance of the sensor is tested through experiments, and it is evident from the results that it has a sensitivity of 2.2 mV/(kV/m) and a linear measurement range from 0.045 kV/m to 178.78 kV/m. When electric fields of 27.95 kV/m, 40.46 kV/m, and 56.92 kV/m are applied with the electric field direction parallel to the x -axis, and the sensor is rotated around the x -axis by 360° in the yoz plane, the sensor system outputs are 6.6 mV, 5.3 mV, and 8.4 mV, respectively. In contrast, when the electric field direction is parallel to the y -axis, the sensor system outputs are 47.27 mV, 70.14 mV, and 97.61 mV, respectively, which results in that the sensor as better unidirectivity. Finally, an experimental system is constructed, and the developed sensor is used to measure both axial and radial electric field distributions across the surface of a high-voltage composite insulator rated at 10 kV. The resulting electric field distribution is approximately " U "-shaped.

关键词：

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：