检索结果-内蒙古大学图书馆

Fully Actuated system Theory and Applications (CFASTA), Conference on

作者： Junpeng Mai Hanzhao Shao Shaojie Liu Yuanzhuo Zhang Liangming Chen Huijuan Feng School of System Design and Intelligent Manufacturing and Shenzhen Key Laboratory of Control Theory and Intelligent Systems Southern University of Science and Technology Shenzhen P. R. China Department of Electronic and Electrical Engineering Southern University of Science and Technology Shenzhen P. R. China Department of Mechnical and Energy Engineering Southern University of Science and Technology Shenzhen P. R. China

ISBN: (数字)9798350373691

ISBN: (纸本)9798350373707

This paper aims to analyze the motion behavior of an origami robot with a coupled bar-hinge mechanism. By disassembling the planar six-hinge mechanism into two planar four-hinge mechanisms with coupled motion, this paper derives the kinematics of the planar six-hinge mechanism based on the algebraic differential kinematics of the planar four-hinge motions. The rotational angle change and the moving step length of the origami robot are further calculated. Finally, the theoretical motion model is verified with the motion simulation data of the planar six-hinge mechanism origami robot in SolidWorks and the experimental data of the physical model. This verification proves the feasibility of the theoretical analysis, simulation model, and physical model.

关键词： Solid modeling Analytical models Prototypes Kinematics Three-dimensional printing Mathematical models Data models

来源：评论

学校读者我要写书评

暂无评论

Special Aspects of the Kinetics of Reactive Ion Etching of SiO2 in Fluorine-, Chlorine-, and Bromine-Containing Plasma

引用

Russian Microelectronics 2020年第2期49卷 94-102页

作者： Efremov, A.M. Murin, D.B. Betelin, V.B. Kwon, K.-H. Department of Technology of Instruments and Materials of Electronic Engineering Ivanovo State University of Chemistry and Technology Ivanovo153000 Russia Scientific Research Institute of System Analysis Moscow117218 Russia Department of Control and Instrumentation Engineering Korea University Sejong339-700 Korea Republic of

Abstract: The influence of the type of active gas and the ratio of the concentration of the components of the CF4 + Ar, Cl2 + Ar, and HBr + Ar mixtures on the parameters of the plasma, steady-state concentrations of the active particles, and kinetics of reactive-ion etching of SiO2 is investigated. It is demonstrated that the rate of etching SiO2 decreases in the CF4–Cl2–HBr series and is characterized by nonmonotonic (with the maximum at 20–25% Ar) behaviour under the variation of the initial composition of the mixtures. It is found that the reasons for the nonmonotonicity for each of the mixtures are the increased effective probability of the interaction and decreased yield of etching due to the change in the physical parameters of the plasma and densities of the fluxes of the active particles. © 2020, Pleiades Publishing, Ltd.

关键词： Silica

来源：评论

学校读者我要写书评

暂无评论

2-D GCANet Applied to Denoise 1-D EEG Signals in Online Remote Teaching Scenarios

Journal of Network Intelligence

引用

Journal of Network Intelligence 2023年第4期8卷 1289-1302页

作者： Huang, Ting-Qing Wang, Chuan-Sheng Chen, Zhao-Qi Zhang, Fu-Quan Meng, Xiang-Long Grau, Antoni Chen, Yang Huang, Jing-Wei College of Computer and Control Engineering Minjiang University Fuzhou University Town No. 200 Xiyuangong Road Fuzhou China Department of Automatic Control Technical Polytechnic University of Catalonia Autonomous Region of Catalonia Barcelona Spain College of Computer and Big Data Fuzhou University Fuzhou University Town No. 2 Wulong Jiangbei Avenue Fuzhou China Digital Media Art Key Laboratory of Sichuan Province Sichuan Conservatory of Music No. 2 Wannianchang Street Chenghua District Sichuan Province Chengdu City China Fuzhou Technology Innovation Center of intelligent Manufacturing information System Minjiang University Fuzhou University Town NO. 200 Xiyuangong Road Fuzhou China Fujian Province University No. 599 Quanxiu Road Juyuanzhou Ecological Civilization District Fujian Province Fuzhou City China College of Electronic Engineering Shandong University of Science and Technology No. 579 Qianwangang Road Huangdao District Qingdao China School of Mechanical and Automotive Engineering Fujian University of Technology No. 33 Xuefu South Road University New District Fujian Province Fuzhou City China

When EEG signals are used to assess the level of student engagement in online teaching tasks, they are often interfered by noise. It is a challenge to effectively remove these noises. Currently, deep learning methods have been applied to the field of EEG denoising. However, existing methods still have some problems. The denoised signals still have obvious noise residue, or the original EEG signals are damaged, and the model fitting speed is too slow. Image dehazing, as a typical denoising task in the field of image enhancement, has achieved great success in recent years. Therefore, inspired by advanced models in this field, we introduce CNN into EEG denoising tasks. In this paper, we take GCANet, an excellent image enhancement model, as an example. The dilated convolutions and gate fusion subnetworks included in GCANet enable more efficient EEG signal denoising. The results demonstrate that the proposed model effectively reduces noise while preserving essential features. Furthermore, in comparison to other state-of-the-art models, our proposed model exhibits enhanced robustness and faster convergence, as evidenced by achieving lower loss values after five epochs. Its good performance provides a new development idea for the field of EEG denoising. © 2023, Taiwan Ubiquitous Information CO LTD. All rights reserved.

关键词： Image enhancement

来源：评论

学校读者我要写书评

暂无评论

Advanced EM Topology Optimization of the Symmetrical Two-pole Waveguide Filter Using Matrix Dimensionality Reduction Technique

Advanced EM Topology Optimization of the Symmetrical Two-pol...

引用

IEEE International Wireless Symposium (IWS)

作者： Jiali Zhang Feng Feng Jing Jin Wei Zhang Lin Zhu Ningning Yan Kaixue Ma Qi-Jun Zhang School of Microelectronics Tianjin University Tianjin China College of Physical Science and Technology Central China Normal University Wuhan China School of Electronic Engineering Beijing University of Posts and Telecommunications Beijing China School of Control and Mechanical Engineering Tianjin Chengjian University Tianjin China Department of Electronics Carleton University Ottawa ON Canada

Electromagnetic (EM) topology optimization is a methodology to optimize the EM response of the microwave component by modifying its topology layout. Genetic Algorithm (GA) is among typical algorithms. Matrix Padé Via Lanczos (MPVL) is often applied to accelerate finite element method (FEM) based EM simulations. This paper has optimized a symmetrical two-pole waveguide filter by an efficient topology optimization with GA. A matrix dimensionality reduction technique is applied to fasten the EM simulation in optimization.

关键词：

来源：评论

学校读者我要写书评

暂无评论

A Model Predictive Current control for a Three-Phase Modular Matrix Converter

A Model Predictive Current Control for a Three-Phase Modular...

引用

IEEE Energy Conversion Congress and Exposition, ECCE

作者： Maryam Sarebanzadeh Mohammad Ali Hosseinzadeh Ralph Kennel Ebrahim Babaei Marco Rivera Patrick Wheeler Chair of High-Power Converters System Technical University of Munich Munich Germany Faculty of Electrical and Computer Engineering University of Tabriz Tabriz Iran Department of Electrical and Electronic Engineering Faculty of Engineering Chair of Power Electronics Machines and Control (PEMC) Research Group University of Nottingham Nottingham UK Laboratorio de Conversión de Energías y Electrónica de Potencia (LCEEP) Vicerrectoría Academica Universidad de Talca Talca Chile

ISBN: (数字)9798350376067

ISBN: (纸本)9798350376074

The modular matrix converter (MMC) integrates a multi-winding transformer with a three-phase-to-single-phase matrix converter for each phase, making it suitable for high-power, high-voltage applications. Predictive control is an advanced control technique widely applied to power converters due to its numerous advantages, including fast dynamic response, the elimination of the need for proportional gain, and straightforward implementation. This study proposes a model predictive control (MPC) strategy to regulate load currents, reactive power, and common-mode voltage in a three-phase modular matrix converter. The proposed MPC algorithm selects the optimal switching states from all valid options for the modular matrix converter to apply in the next control step. A cost function is then used to minimize the error between the predicted system variables and their reference values, ensuring that the best states are applied to the modular matrix converter. The proposed MPC technique effectively controls the load currents to follow the desired reference signals, maintains sinusoidal source current waveforms by regulating reactive power, and reduces the magnitude of the common-mode voltage. The performance of the proposed approach is demonstrated through simulation results obtained in the MATLAB/Simulink environment.

关键词： Current control Reactive power Total harmonic distortion Simulation Switches Cost function Transformers Matrix converters Voltage control Predictive control

来源：评论

学校读者我要写书评

暂无评论

Result Fusion for Integrated Active and Passive Sensing in DFRC systems

Result Fusion for Integrated Active and Passive Sensing in D...

引用

IEEE International Conference on Communications (ICC)

作者： Wenchao Xia Xingliang Lou Kai-Kit Wong Tony Q. S. Quek Hongbo Zhu Jiangsu Key Laboratory of Wireless Communications Nanjing University of Posts and Telecommunications Nanjing P. R. China Department of Electronic and Electrical Engineering University College London London WC1E 6BT UK Information System Technology and Design Pillar Singapore University of Technology and Design Singapore

ISBN: (数字)9781728190549

ISBN: (纸本)9781728190556

Most existing works on dual-function radar-communication (DFRC) systems mainly focus on active sensing, but ignore passive sensing. To leverage multi-static sensing capability, we explore integrated active and passive sensing (IAPS) in DFRC systems to remedy sensing performance. The multi-antenna base station (BS) is responsible for communication and active sensing by transmitting signals to user equipments while detecting a target according to echo signals. In contrast, passive sensing is performed at the receive access points (RAPs). Considering the limited capacity of backhaul links, the signals received at the RAPs cannot be sent to the central controller (CC) directly. Instead, a novel metric of result aggregation for IAPS is proposed. Specifically, each RAP, as well as the BS, makes decisions independently and sends its binary inference results to the CC for result fusion via voting aggregation. Then, aiming at minimizing the probability of error at the CC under communication quality of service constraints, an algorithm of power optimization is proposed. Finally, numerical results validate the positive effect of dedicated sensing symbols and the potential of the proposed IAPS scheme.

关键词： Measurement Heuristic algorithms Symbols Quality of service Performance gain Inference algorithms Sensors

来源：评论

学校读者我要写书评

暂无评论

Printable organic light-emitting diodes for next-generation visible light communications:a review

引用

Advanced Photonics Nexus 2023年第4期2卷 1-14页

作者： Kunping Guo Zhe Tang Xingxing Chou Saihu Pan Chunchen Wan Tao Xue Liping Ding Xiao Wang Jin Huang Fanghui Zhang Bin Wei Shaanxi University of Science and Technology School of Electronic Information and Artificial IntelligenceXi’anChina University College London Department Physics and Astronomy and London Centre for NanotechnologyLondonUnited Kingdom Shaanxi University of Science and Technology School of Electrical and Control EngineeringXi’anChina Changzhou University School of Microelectronics and Control EngineeringChangzhouChina Shanghai University Ministry of EducationKey Laboratory of Advanced Display and System ApplicationsShanghaiChina

Visible light communication(VLC)is an emerging technology employing light-emitting diodes(LEDs)to provide illumination and wireless data transmission *** cost-efficient printable organic LEDs(OLEDs)as environmentally friendly transmitters in VLC systems is extremely attractive for future applications in spectroscopy,the internet of things,sensing,and optical ranging in ***,we summarize the latest research progress on emerging semiconductor materials for LED sources in VLC,and highlight that OLEDs based on nontoxic and cost-efficient organic semiconductors have great opportunities for optical *** further examine efforts to achieve high-performance white OLEDs for general lighting,and,in particular,focus on the research status and opportunities for OLED-based *** solution-processable fabrication and printing strategies to develop high-performance OLEDs are also ***,an outlook on future challenges and potential prospects of the next-generation organic VLC is provided.

关键词： organic light-emitting diode visible light communication printable vehicular applications internet of things

来源：评论

学校读者我要写书评

暂无评论

Dynamic time warping-based transfer learning for improving common spatial patterns in brain-computer interface

Dynamic time warping-based transfer learning for improving c...

引用

作者： Azab, Ahmed M. Ahmadi, Hamed Mihaylova, Lyudmila Arvaneh, Mahnaz Department of Automatic Control and System Engineering Sheffield University Sheffield United Kingdom School of Computer Science and Electronic Engineering University of Essex Essex United Kingdom

Objective. Common spatial patterns (CSP) is a prominent feature extraction algorithm in motor imagery (MI)-based brain-computer interfaces (BCIs). However, CSP is computed using sample-based covariance-matrix estimation. Hence, its performance deteriorates if the number of training trials is small. To address this problem, this paper proposes a novel regularized covariance matrix estimation framework for CSP (i.e. DTW-RCSP) based on dynamic time warping (DTW) and transfer learning. Approach. The proposed framework combines the subject-specific covariance matrix (Σ55) estimated using the available trials from the new subject, with a novel DTW-based transferred covariance matrix (ΣDTW) estimated using previous subjects trials. In the proposed ΣDTW, the available labelled trials from the previous subjects are temporally aligned to the average of the available trials of the new subject from the same class using DTW. This alignment aims to reduce temporal variations and non-stationarities between previous subjects' trials and the available trials from the new subjects. Moreover, to tackle the problem of regularization parameter selection when only a few trials are available for training, an online method is proposed, where the best regularization parameter is selected based on the confidence scores of the trained classifier on the upcoming first few labelled testing trials. Main results. The proposed framework is evaluated on two datasets against two baseline algorithms. The obtained results reveal that DTW-RCSP significantly outperformed the baseline algorithms at various testing scenarios, particularly, when only a few trials are available for training. Significance. Impressively, our results show that successful BCI interactions could be achieved with a calibration session as small as only one trial per class. © 2020 IOP Publishing Ltd.

关键词： Covariance matrix

来源：评论

学校读者我要写书评

暂无评论

Crowdsourced GNSS Satellite SNR in Degraded Environments for Dependability Improvement 22

Crowdsourced GNSS Satellite SNR in Degraded Environments for...

引用

22nd International Conference on Electromagnetics in Advanced Applications, ICEAA 2021

作者： Sun, Hao Lu, Debiao Cai, Baigen Xiao, Yu Beijing Jiaotong Univ. Beijing Eng. Research Center of Emc and Gnss Technology for Rail Transport School of Electronic and Information Engineering Frontiers Science Center for Smart High-speed Railway System Beijing China Beijing Jiaotong University State Key Laboratory of Rail Traffic Control and Safety School of Electronic and Information Engineering Frontiers Science Center for Smart High-speed Railway System Beijing China Aalto University School of Electrical Engineering Department of Communications and Networking Espoo Finland

ISBN: (纸本)9781665413862

Global Navigation Satellite systems (GNSS) localization uses time of arrival (TOA) to measure the distance between satellite and rover antenna. The key for TOA technique is the signal propagation should be straight geometrically. However, when the train runs in harsh environments, the GNSS signal quality can be degraded due to obstacles. GNSS signals are usually blocked by buildings and other obstacles, resulting in reflection and reflection, which leads to multipath positioning errors of LOS and NLOS. In the case of LOS multipath error, the GNSS receiver tracks the direct and reflected / diffracted composite signal, and the reflected / diffracted signal affects the correlation function tracking loop of the direct signal in GNSS. In the case of NLOS multipath error, GNSS receiver directly tracks reflected or diffracted signal because there is no direct satellite signal. In both cases, the multipath signal will have a large noise error range which is reflected in the change of SNR. In the GNSS solution, various GNSS receivers are used to obtain the SNR of each satellite to achieve the fully coverage of the satellite signal reception quality. Thus with limited GNSS receiver observation results, of the crowdsourcing of NLOS signal inspection will deliver the observation results in a more convenient way. In the open environment scenario, the relationship between elevation angle and SNR can be fitted by a linear function. However, in GNSS signal reception degraded environments (urban canyon etc.), The SNR at the elevation angle of the occlusion boundary will be drastically reduced. This will give us the boundary of the occlusion range. Based on this principle, we can map the environmental characteristics of different sections of the railway. The railway environment can generally be divided into open scenario, road cutting scenario, half sky scenario, urban canyon scenario and tunnel scenario. 5 typical scenario all have distinct environmental characteristics. By matching

关键词： Satellites

来源：评论

学校读者我要写书评

暂无评论

Sensing as a Service in 6G Perceptive Networks: A Unified Framework for ISAC Resource Allocation

arXiv

引用

arXiv 2022年

作者： Dong, Fuwang Liu, Fan Cui, Yuanhao Wang, Wei Han, Kaifeng Wang, Zhiqin The Department of Electronic and Electrical Engineering Southern University of Science and Technology Shenzhen518055 China The School of Information and Communication Engineering Beijing University of Posts and Telecommunications Beijing100876 China The College of Intelligent System Science and Engineering Harbin Engineering University Harbin150001 China The China Academy of Information and Communications Technology Beijing100191 China

In the upcoming next-generation (5G-Advanced and 6G) wireless networks, sensing as a service will play a more important role than ever before. Recently, the concept of perceptive network is proposed as a paradigm shift that provides sensing and communication (S&C) services simultaneously. This type of technology is typically referred to as Integrated Sensing and Communications (ISAC). In this paper, we propose the concept of sensing quality of service (QoS) in terms of diverse applications. Specifically, the probability of detection, the Crámer-Rao bound (CRB) for parameter estimation and the posterior CRB for moving target indication are employed to measure the sensing QoS for detection, localization, and tracking, respectively. Then, we establish a unified framework for ISAC resource allocation, where the fairness and the comprehensiveness optimization criteria are considered for the aforementioned sensing services. The proposed schemes can flexibly allocate the limited power and bandwidth resources according to both S&C QoSs. Finally, we study the performance trade-off between S&C services in different resource allocation schemes by numerical simulations. Copyright © 2022, The Authors. All rights reserved.

关键词： Resource allocation

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：