检索结果-内蒙古大学图书馆

63rd IEEE Conference on Decision and Control, CDC 2024

作者： Rego, Brenner S. Raffo, Guilherme V. Terra, Marco H. Scott, Joseph K. Georgia Institute of Technology Department of Chemical and Biomolecular Engineering 311 Ferst Dr. AtlantaGA30318 United States University of Säo Paulo Department of Electrical and Computer Engineering SP Säo Carlos13566-590 Brazil Federal University of Minas Gerais Department of Electronics Engineering and the Graduate Program in Electrical Engineering MG Belo Horizonte31270-901 Brazil

ISBN: (纸本)9798350316339

This paper presents a novel algorithm for reachability analysis of nonlinear discrete-time systems. The proposed method combines constrained zonotopes (CZs) with polyhedral relaxations of factorable representations of nonlinear functions to propagate CZs through nonlinear functions, which is normally done using conservative linearization techniques. The new propagation method provides better approximations than those resulting from linearization procedures, leading to significant improvements in the computation of reachable sets in comparison to other CZ methods from the literature. Numerical examples highlight the advantages of the proposed algorithm. © 2024 IEEE.

关键词： Numerical methods

来源：评论

学校读者我要写书评

暂无评论

Finite-time robust performance improvement for non-linear systems in the presence of input non-linearity and external disturbance

引用

IET Control Theory and Applications 2023年第6期17卷 672-682页

作者： Wang, Haoping Ghaffari, Valiollah Mobayen, Saleh Bartoszewicz, Andrzej Fekih, Afef Assawinchaichote, Wudhichai School of Automation Nanjing University of Science and Technology Nanjing China Department of Electrical Engineering Persian Gulf University Bushehr Iran Graduate School of Intelligent Data Science National Yunlin University of Science and Technology Yunlin Douliou Taiwan Institute of Automatic Control Lodz University of Technology Lodz Poland Department of Electrical and Computer Engineering University of Louisiana at Lafayette LafayetteLA United States Department of Electronic and Telecommunication Engineering Faculty of Engineering King Mongkut's University of Technology Thonburi Bangkok Thailand

The main focus of this research is on improving the performance of dynamic systems with actuator non-linearities and time-varying disturbances. To this end, using the concept of finite-time stability, a novel observer is presented to estimate the disturbances in systems with input non-linearities. Then, introducing an innovative sliding manifold, a robust observer-based technique is derived to guarantee the finite-time stability of the sliding surface. Hence, the closed-loop system would be stable in the presence of hard non-linearities and time-varying disturbances. The performance of the proposed approach was assessed in using a simulation study of two numerical examples. The obtained results and comparison with a conventional method confirmed the benefits of the suggested approach. © 2022 The Authors. IET Control Theory & Applications published by John Wiley & Sons Ltd on behalf of The Institution of engineering and Technology.

关键词： Closed loop systems

来源：评论

学校读者我要写书评

暂无评论

Enhancement of dampinglike spin-orbit torque efficiency using light and heavy nonmagnetic metals on a polycrystalline RuO2 layer

引用

Physical Review B 2024年第13期110卷 134423页

作者： Yoshiaki Saito Shoji Ikeda Shutaro Karube Tetsuo Endoh Center for Innovative Integrated Electronic Systems Center for Science and Innovation in Spintronics Research Institute of Electrical Communication Institute for Chemical Research Department of Electrical Engineering Graduate School of Engineering

Crystal growth and magnetic and spin-orbit torque (SOT) properties of the systems with polycrystalline RuO2 consisting of RuO2/SHM/Co/Ir/MgO/Ta (SHM = Pt, [Pt/Ir] multilayer) and RuO2/NM/Pt/Co/Ir/MgO/Ta (NM=Ru,Ti) and the effects of RuO2 and light or heavy metal (NM and SHM) interfaces on spin current generated from the spin-split band (SSB) are investigated. The Pt layer and [Pt/Ir] multilayer on the polycrystalline RuO2 layer have flat and (111) texture, which induces perpendicular magnetization of Co. Enhancement of dampinglike SOT efficiency (ξDL) in the thin Pt and [Pt/Ir]-multilayer thickness region and nearly constant magnitude of ξDL as a function of the thickness of NM=Ti are observed. Moreover, field-free switching was observed even in the polycrystalline RuO2/Pt heavy metal system in the thin Pt thickness region (tPt≤2nm). The observed field-free switching may be related to the exchange bias from the antiferromagnetic RuO2 layer to the Co layer through a thin Pt layer. The spin-torque ferromagnetic resonance results show that the x- and z-spin polarizations originating from SSB are canceled out for the polycrystalline RuO2 system. These results indicate that the efficiency of SOT is enhanced by orbital Rashba-Edelstein, spin Hall, and orbital Hall effects. We expect that polycrystalline RuO2-based systems will pave the way to antiferromagnetic spintronics.

关键词： electrical conductivity electrical properties Magnetism Spin-orbit coupling Spintronics

来源：评论

学校读者我要写书评

暂无评论

Maximum Delay Analysis of Fixed Backoff in IEEE 802.11 Considering Significant Interference for In-Vehicle Wireless Communication

引用

IEEE Access 2025年 13卷 85170-85176页

作者： Sanada, Kosuke Shiohara, Takumi Iwaki, Atsuhiro Hirai, Takeshi Murase, Tutomu Mie University Department of Electrical and Electronic Engineering Mie Japan Nagoya University Graduate School of Engineering Nagoya Japan Osaka University Graduate School of Information Osaka Japan

In in-vehicle wireless communication, each in-vehicle sensor terminal transmits small data in a cycle within which all terminals must transmit data successfully. Clarifying the delay characteristics in such networks is useful for the system design. This paper proposes a maximum delay distribution analysis method for the fixedCWmethod in CSMA/CA mission-critical periodic communications. The proposed method focuses on the fact that the upper bound of the distribution of the number of collisions and the transition of the number of terminals can be approximated by a binomial distribution. In the first step, the distribution of the total number of slots required for all terminals departure is derived from a two-dimensional Markov-chain model. In the second step, the total slot number distribution is converted into a real-time scale according to the events occurring in a slot, and the upper bound of the maximum delay distribution is derived. This analytical method analytically derives the upper bound of the maximum delay distribution for an arbitrary number of terminals in the network with a fixed CW value while taking interference induced by competition terminals into account. The validity of the proposed method is demonstrated through comparison with computer simulation results. © 2013 IEEE.

关键词： Carrier communication

来源：评论

学校读者我要写书评

暂无评论

Low-Capacitance Solid-State Transformer Control Using an Analytic Filter 11

Low-Capacitance Solid-State Transformer Control Using an Ana...

引用

11th International Conference on Power electronics - ECCE Asia, ICPE 2023-ECCE Asia

作者： Sarda, Radhika Rodriguez, Ezequiel Gorla Yadav, Naga Brahmendra Farivar, Glen G. Pou, Josep Sriram, V.B. Tripathi, Anshuman Nanyang Technological University Energy Research Institute at Ntu Interdisciplinary Graduate Programme Singapore Nanyang Technological University Energy Research Institute at Ntu Singapore Indian Institute of Technology Palakkad Department of Electrical Engineering 678623 India University of Melbourne Department of Electrical and Electronic Engineering Melbourne Australia Nanyang Technological University School of Electrical and Electronic Engineering Singapore

ISBN: (纸本)9788957083505

In the modular three-stage solid-state transformer (SST), each phase is integrated with large dc-link capacitors as energy buffers, to filter the second harmonic capacitor voltage ripple generated due to single-phase power processing. Although large dc-link capacitors reduce the coupling between stages of the SST and simplify the controller design, they compromise the reliability, safety and power density of the SST. Accordingly, a low-capacitance SST is desirable to address these challenges. To provide a high-bandwidth control for the low-capacitance SST, this paper proposes using an analytic filtering scheme rather than the low-pass filters used in conventional SST control schemes. A portion of the second harmonic power ripple in the high-voltage dc-link capacitors is processed by the SST s dc-dc stage to facilitate the use of low capacitance. The effectiveness of the proposed control is demonstrated through a simulation study in PLECS. © 2023 The Korean Institute of Power electronics.

关键词： Capacitance

来源：评论

学校读者我要写书评

暂无评论

Enhancing modulation bandwidth of parallel microLED arrays for visible light communication

IEEE Electron Device Letters

引用

IEEE Electron Device Letters 2025年第6期46卷 944-947页

作者： Guo, Wen-An Wan, Ming-He Liu, Shi-Biao Liu, Zhong Lu, Ting-Wei Chen, Guo-Long Lu, Yi-Jun Kuo, HaoChung Wu, Ting-Zhu Chen, Zhong Xiamen University National Integrated Circuit Industry and Education Integration Innovation Platform Department of Electronic Science Xiamen361005 China National Yang Ming Chiao Tung University College of Electrical and Computer Engineering Department of Photonics Graduate Institute of Electro-Optical Engineering Hsinchu30010 Taiwan Hon Hai Research Institute Semiconductor Research Center Taipei11492 Taiwan

In this letter, parallel micro-LED arrays with numbers of 1×1, 1×2, 2×2 and 2×3 were fabricated and the p-electrode patterns of arrays were optimized. The results show that both the light output power (LOP) and modulation bandwidth increase with the parallel array numbers. Moreover, optimizing the p-electrode pattern can effectively facilitate current spreading, mitigate thermal crowding, and enhance the LOP. Under combined with the LOP and thermal effect, the 2×2 ring-electrode parallel array achieved the highest modulation bandwidth of 172 MHz and maximum LOP of 5.70 mW, which were improved by 17.28% and 13.98%, respectively. This work provides a reference to design micro-LED chip for high bandwidth. © 1980-2012 IEEE.

关键词： Bandwidth

来源：评论

学校读者我要写书评

暂无评论

Experimental Evaluation of a Lightweight and Backdrivable Powered Knee Prosthesis for Transfemoral Amputees 1

Experimental Evaluation of a Lightweight and Backdrivable Po...

引用

1st IEEE Colombian Caribbean Conference, C3 2023

作者： Ulhoa, Pedro Fiorezi, Guilherme Filho, Teodiano Andrade, Rafhael Universidade Federal Do Espírito Santo Department of Electrical Engineering Vitória Brazil Universidade Federal Do Espírito Santo Department of Mechanical Engineering Vitória Brazil Universidade Federal Do Espírito Santo Graduate Program in Electrical Engineering Vitória Brazil Universidade Federal Do Espírito Santo Graduate Program in Mechanical Engineering Vitória Brazil

ISBN: (纸本)9798350341799

Rehabilitation of amputees is still mostly limited to passive technology that cannot provide energy to the gait and contribute to a better experience and comfort of walking. To address this shortcoming, active prostheses have been introduced with actuators capable of generating and dissipating energy in a controlled way. However, proposed designs of powered leg prosthesis still present heavy and bulky structure or low backdrivable actuators, which reduce the volitional control and comfort of the user. This work presents the development and control of a lightweight and highly backdrivable powered knee prosthesis. The designed actuator is composed by a coaxial motor-reducer with a 200 W brushless DC motor in series with a harmonic drive with a 51:1 ratio. After assembled the leg prosthesis weights just 3.64 kg. Bench tests were performed to validate the model and tune a position-based controller. Then, a custom force sensor was implemented to measure ground reaction force and identify gait phases so an impedance controller can regulate joint torque. The powered prosthesis was experimented in three able-bodied subjects walking on a treadmill using both the position and impedance controller. The prosthesis presented high backdrivability in bench tests and the treadmill results shown that the proposed impedance controller was more effective to follow the healthy knee trajectory compared to the position controller. In future works we plan to evaluate the prosthesis in amputee subjects. © 2023 IEEE.

关键词： Controllers

来源：评论

学校读者我要写书评

暂无评论

A Three-Level Zero Harmonic Distortion Grid-Forming Converter For Medium Voltage Islanded Microgrids

A Three-Level Zero Harmonic Distortion Grid-Forming Converte...

引用

2024 Energy Conversion Congress and Expo Europe, ECCE Europe 2024

作者： Ramos, Gabriel V. Parreiras, Thiago M. Filho, Braz De J. C. Universidade Federal de Minas Gerais Graduate Program in Electrical Engineering MG Av. Antonio Carlos 6627 Belo Horizonte31270-901 Brazil Centro Federal de Educação Tecnológica de Minas Gerais Department of Electrical Engineering Belo Horizonte Brazil Universidade Federal de Minas Gerais Department of Electrical Engineering Belo Horizonte Brazil

ISBN: (纸本)9798350364446

The world has been experiencing a fast change in the production and use of electrical energy. The electric power system is fast changing from the conventional centralized generation to a more distributed generation (DG) with renewable energy sources installed near the consumers. The evolution of DG paves the way for the concept of grid-forming converters improving voltage and frequency stability in microgrids (MGs) and islanded applications, due to the growth of inverter-based resources. In islanded MG, power quality is a concern due to the presence of disturbing loads and possible resonance issues encountered with multiple electronically interfaced distributed energy resources (DERs) and loads. The present work proposes the Three-Level Zero Harmonic Distortion Converter (ZHD) grid-forming converter due to its inherently sinusoidal voltage source characteristic without the need of capacitive filtering elements that negatively impact in costs, efficiency, size and can be a source of resonances issues. These features are achieved by the proper combination of harmonic cancellation in a three-winding transformer and harmonic elimination using the Selective Harmonic Elimination Pulse Width Modulation (SHE PWM). Simulation results show the Three-Level ZHD converter setting voltage and frequency to an Medium Voltage (MV) islanded microgrid, delivering sinusoidal voltage waveforms even in the presence of nonlinear loads. The converter is able to maintain the voltage distortion below the IEEE 519 limits by respecting the current harmonic limits imposed by the same standard. © 2024 IEEE.

关键词： Harmonic distortion

来源：评论

学校读者我要写书评

暂无评论

An RFID-Based Battery-Less Vibration Monitoring System for electrical Appliances

An RFID-Based Battery-Less Vibration Monitoring System for E...

引用

2022 International Symposium on Information Technology and Digital Innovation, ISITDI 2022

作者： Song, Zequn Sun, Ran Rahmadya, Budi Takeda, Shigeki Engineering Graduate School Of Science And Engineering Ibaraki University Department Of Electrical And Electronic System Hitachi Japan Engineering Ibaraki University Department Of Electrical And Electronic System Hitachi Japan Andalas University Computer System Department Padang Indonesia

ISBN: (数字)9781665461160

ISBN: (纸本)9781665461160

This paper presents a vibration monitoring system for electrical appliances. This system is based on RFID sensors and edge processing technologies. For long-term monitoring, two different operation modes referred to as standby and active modes are introduced. The difference between the two modes is radio wave radiation times. The standby mode is useful to reduce energy consumption and temperature increase of an RFID reader, and amount of data uploaded to a network. This mode also detects a beginning of a vibration event caused by the motor of an electrical appliance. The standby mode subsequently triggers the active mode. The active mode accurately monitors the vibration event and keeps the measured data only for the active mode. Experiments for monitoring a refrigerator demonstrate that the proposed modes enable efficient vibration detections. This system can prevent unintended COVID-19 vaccine disposals caused by the problematic operation and management of refrigerators. © 2022 IEEE.

关键词： COVID-19

来源：评论

学校读者我要写书评

暂无评论

Optical trapping-induced crystallization promoted by gold and silicon nanoparticles

引用

Photochemical and Photobiological Sciences 2024年第9期23卷 1697-1707页

作者： Su, Hao-Tse Liu, Shao-Yuan Fujii, Minoru Sugimoto, Hiroshi Tanaka, Yoshito Y. Sugiyama, Teruki Department of Applied Chemistry and Center for Emergent Functional Matter Science National Yang Ming Chiao Tung University Hsinchu300093 Taiwan Department of Electrical and Electronic Engineering Graduate School of Engineering Kobe University Nada Rokkodai Kobe657-8501 Japan Research Institute for Electronic Science Hokkaido University Hokkaido Sapporo001-0021 Japan Division of Materials Science Graduate School of Science and Technology Nara Institute of Science and Technology Nara Ikoma630-0192 Japan

This study investigates the promotion of sodium chlorate (NaClO3) crystallization through optical trapping, enhanced by the addition of gold nanoparticles (AuNPs) and silicon nanoparticles (SiNPs). Using a focused laser beam at the air–solution interface of a saturated NaClO3 solution with AuNPs or SiNPs, the aggregates of these particles were formed at the laser focus, the nucleation and growth of metastable NaClO3 (m-NaClO3) crystals were induced. Continued laser irradiation caused these m-NaClO3 crystals to undergo repeated cycles of growth and dissolution, eventually transitioning to a stable crystal form. Our comparative analysis showed that AuNPs, due to their significant heating due to higher photon absorption efficiency, caused more pronounced size fluctuations in m-NaClO3 crystals compared to the stable behavior observed with SiNPs. Interestingly, the maximum diameter of the m-NaClO3 crystals that appeared during the size fluctuation step was consistent, regardless of nanoparticle type, concentration, or size. The crystallization process was also promoted by using polystyrene nanoparticles, which have minimal heating and electric field enhancement, suggesting that the reduction in activation energy for nucleation at the particle surface is a key factor. These findings provide critical insights into the mechanisms of laser-induced crystallization, emphasizing the roles of plasmonic heating, particle surfaces, and optical forces. Graphical abstract: (Figure presented.) © The Author(s) 2024. corrected publication 2024.

关键词： Laser beams

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：