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Power Electronic and Drive Systems and Technologies Conference (PEDSTC)

作者： Aliyu Sabo Kabir Garba Jibia Hossein Shahinzadeh Mohammad Mohsen Hayati Mehdi Abapour Gevork B. Gharehpetian Department of Electrical and Electronic Engineering Advanced Lightning Power and Energy Research (ALPER) Universiti Putra Malaysia Malaysia Department of Electrical Engineering Amirkabir University of Technology (Tehran Polytechnic) Tabriz Iran Energy Research Institute (ESRI) Faculty of Electrical and Computer Engineering University of Tabriz Tabriz Iran

ISBN: (数字)9798331533946

ISBN: (纸本)9798331533953

The growing demand for reliable and sustainable energy has driven researchers and engineers to explore renewable energy sources to complement traditional power grids. Wind energy conversion systems (WECS), particularly those using permanent magnet synchronous generators (PMSG), are among the most widely adopted renewable energy solutions. Integrating WECS into traditional grids introduces challenges, including power system oscillations, especially during disturbances or faults. Inertia control and power electronics converters are pivotal in mitigating these oscillations and ensuring grid stability. This review investigates the design and optimization of damping controllers, emphasizing their integration with excitation systems to enhance the dynamic performance of PMSG-based wind integrated grids. Additionally, the role of power electronics in control strategies and inertia emulation for stable grid operation is discussed. The findings highlight the critical importance of advanced control measures in addressing the inherent uncertainties of renewable energy systems integrated with conventional grids.

关键词： Damping Renewable energy sources Uncertainty Reviews Power system stability Power electronics Synchronous generators Permanent magnets Oscillators Wind energy conversion

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Observation of Su-Schrieffer-Heeger Topological Model Band Structure in Integrated LNOI Coupled Ring Cavities 16

Observation of Su-Schrieffer-Heeger Topological Model Band S...

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16th Pacific Rim Conference on Lasers and Electro-Optics, CLEO-PR 2024

作者： Dinh, Hiep X. Balcytis, Armandas Ozawa, Tomoki Ota, Yasutomo Baba, Toshihiko Iwamoto, Satoshi Mitchell, Arnan Nguyen, Thach G. Rmit University Integrated Photonics and Applications Centre MelbourneVIC3000 Australia Advanced Institute for Materials Research Tohoku University Sendai980-8577 Japan Keio University Department of Applied Physics and Physico-Informatics Yokohama223-8522 Japan Yokohama National University Department of Electrical and Computer Engineering Yokohama240-8501 Japan The University of Tokyo Research Center for Advanced Science and Technology Tokyo153-8904 Japan

We report synthetic frequency dimension Su-Schrieffer-Heeger model and its band structure observation using coupled ring cavities on an integrated photonic chip. Intra-cell and inter-cell couplings between hybridized ... 详细信息

ISBN: (纸本)9798350372076

关键词： Photonic integrated circuits

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Controlled manipulation of conductive ferroelectric domain walls and nanoscale domains in BiFeO_(3) thin films

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Journal of Materiomics 2022年第2期8卷 274-280页

作者： Dongfeng Zheng Guo Tian Yadong Wang Wenda Yang Luyong Zhang Zoufei Chen Zhen Fan Deyang Chen Zhipeng Hou Xingsen Gao Qiliang Li Jun-Ming Liu Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials and Institute for Advanced Materials South China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou510006China Songshan Lake Materials Laboratory Dongguan Guangdong523808China Department of Electrical and Computer Engineering George Mason UniversityFairfaxVirginia22030USA Laboratory of Solid State Microstructures and Innovation Center of Advanced Microstructures Nanjing UniversityNanjing210093China

Recently,there is a surge of research interest in configurable ferroelectric conductive domain walls which have been considered as possible fundamental building blocks for future electronic *** this work,by using piezoresponse force microscopy and conductive atomic force microscopy,we demonstrated the controlled manipulation of various conductive domain walls in epitaxial BiFeO_(3) thin films,*** domain walls(NDW)and charged domain walls(CDWs).More interestingly,a specific type of nanoscale domains was also identified,which are surrounded by highly conductive circular *** nano-scale domains can also be controlled created and erasured by applying local field via conductive probe,which allow nondestructive current readout of different domain states with a large on/off resistance ratio up to *** results indicate the potential to design and develop high-density non-volatile ferroelectric memories by utilizing these programable conductive nanoscale domain walls.

关键词： BiFeO_(3)thin film Conductive domain wall Nanoscale domain High density memory

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Enhancing Child Vocalization Classification with Phonetically-Tuned Embeddings for Assisting Autism Diagnosis

arXiv

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arXiv 2023年

作者： Li, Jialu Hasegawa-Johnson, Mark Karahalios, Karrie Department of Electrical and Computer Engineering University of Illinois United States Beckman Institute for Advanced Science and Technology University of Illinois United States Department of Computer Science University of Illinois United States

The assessment of children at risk of autism typically involves a clinician observing, taking notes, and rating children’s behaviors. A machine learning model that can label adult and child audio may largely save labor in coding children’s behaviors, helping clinicians capture critical events and better communicate with parents. In this study, we leverage Wav2Vec 2.0 (W2V2), pre-trained on 4300-hour of home audio of children under 5 years old, to build a unified system for tasks of clinician-child speaker diarization and vocalization classification (VC). To enhance children’s VC, we build a W2V2 phoneme recognition system for children under 4 years old, and we incorporate its phonetically-tuned embeddings as auxiliary features or recognize pseudo phonetic transcripts as an auxiliary task. We test our method on two corpora (Rapid-ABC and BabbleCor) and obtain consistent improvements. Additionally, we outperform the state-of-the-art performance on the reproducible subset of BabbleCor. © 2023, CC BY.

关键词： Embeddings

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Robust Model Predictive Control for Onboard Interleaved Multilevel Boost DC-DC Converter in DC Shipboard Microgrids

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IEEE Transactions on Transportation Electrification 2025年

作者： Li, Zhan Chen, Junyu Li, Kerui Xu, Zhao Liu, Yonglu Wang, Minghao The Hong Kong Polytechnic University Department of Electrical and Electronic Engineering Hong Kong Hong Kong The City University of Hong Kong Department of Electrical Engineering Hong Kong Hong Kong Shenzhen Research Institute Department of Electrical and Electronic Engineering China The Hong Kong Polytechnic University Research Institute of Smart Energy Hong Kong Hong Kong Central South University School of Automation Changsha China The Department of Electrical and Computer Engineering China University ofMacau Advanced Research Institute in Hengqin Zhuhai China

DC shipboard microgrids (SMGs) are a low-carbon and feasible solution to host various distributed energy resources (DERs) and shipboard loads. However, the intermittency of DERs and constant power load (CPL) characteristic of the shipboard loads will compromise the stability of DC SMGs. To accommodate DERs and address the stability issue in space-stringent DC SMGs simultaneously, a compound large-signal stabilization scheme is proposed in this paper to operate the interleaved multilevel boost DC-DC converter (IMBDC) in DC SMGs. It combines the high-order nonlinear disturbance observer (NDO) technique and the offset-free model predictive control (MPC) algorithm. Specifically, the uncertain variations of CPLs and circuit parameters are modeled as disturbances. High-order NDOs are used to estimate these disturbances accurately within a finite time. Depending on the estimation and system model, the MPC will regulate the system states against large-signal disturbances. Simulation results demonstrate that the proposed algorithm outperforms the traditional linear and nonlinear control schemes with better stability and dynamic performances. Both the real-time simulation and hardware experiment results are provided to further validate the applicability and effectiveness of the proposed control strategy. © 2015 IEEE.

关键词： Predictive control systems

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A Survey on Indoor Visible Light Positioning Systems: Fundamentals, Applications, and Challenges

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IEEE Communications Surveys and Tutorials 2024年第3期27卷 1656-1686页

作者： Zhu, Zhiyu Yang, Yang Chen, Mingzhe Guo, Caili Cheng, Julian Cui, Shuguang Beijing University of Posts and Telecommunications Beijing Key Laboratory of Network System Architecture and Convergence School of Information and Communication Engineering Beijing100876 China University of Miami Department of Electrical and Computer Engineering and Institute for Data Science and Computing Coral GablesFL33146 United States Beijing University of Posts and Telecommunications Beijing Laboratory of Advanced Information Networks School of Information and Communication Engineering Beijing100876 China The University of British Columbia Faculty of Applied Science School of Engineering KelownaBCV1V 1V7 Canada 518172 Hong Kong

The growing demand for location-based services in areas like virtual reality, robot control, and navigation has intensified the focus on indoor localization. Visible light positioning (VLP), leveraging visible light communications (VLC), becomes a promising indoor positioning technology due to its high accuracy and low cost. This paper provides a comprehensive survey of VLP systems. In particular, since VLC lays the foundation for VLP, we first present a detailed overview of the principles of VLC. Then, we provide an in-depth overview of VLP algorithms. The performance of each positioning algorithm is also compared in terms of various metrics such as accuracy, coverage, and orientation limitation. Beyond the physical layer studies, the network design for a VLP system is also investigated, including multi-access technologies, resource allocation, and light-emitting diode (LED) placements. Next, the applications of the VLP systems are overviewed. Finally, this paper outlines open issues, challenges, and opportunities for the research field. In a nutshell, this paper constitutes the first holistic survey on VLP from state-of-the-art studies to practical uses. © 1998-2012 IEEE.

关键词： Resource allocation

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Multi-population Differential Evolution for RSS based Cooperative Localization in Wireless Sensor Networks with Limited Communication Range

arXiv

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arXiv 2024年

作者： Najarro, Lismer Andres Caceres Song, Iickho Salman, Muhammad Kim, Kiseon Department of Computer Science of Chosun University Gwangju61452 Korea Republic of School of Electrical Engineering and Computer Science Gwangju Institute of Science and Technology Gwangju61005 Korea Republic of College of Electrical & Mechanical Engineering National University of Sciences and Technology Islamabad Pakistan School of Electrical Engineering Korea Advanced Institute of Science and Technology Daejeon34141 Korea Republic of

This paper presents a novel approach to deal with the cooperative localization problem in wireless sensor networks based on received signal strength measurements. In cooperative scenarios, the cost function of the localization problem becomes increasingly nonlinear and nonconvex due to the heightened interaction between sensor nodes, making the estimation of the positions of the target nodes more challenging. Although most of existing cooperative localization algorithms assure acceptable localization accuracy, their computational complexity increases dramatically, which may restrict their applicability. To reduce the computational complexity and provide competitive localization accuracy at the same time, we propose a localization algorithm based on the differential evolution with multiple populations, opposite-based learning, redirection, and anchoring. In this work, the cooperative localization cost function is split into several simpler cost functions, each of which accounts only for one individual target node. Then, each cost function is solved by a dedicated population of the proposed algorithm. In addition, an enhanced version of the proposed algorithm which incorporates the population midpoint scheme for further improvement in the localization accuracy is devised. Simulation results demonstrate that the proposed algorithms provide comparative localization accuracy with much lower computational complexity compared with the state-of-the-art algorithms. Copyright © 2024, The Authors. All rights reserved.

关键词： Cost functions

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Low-overhead distribution strategy for simulation and optimization of large-area metasurfaces

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npj Computational Materials 2022年第1期8卷 735-740页

作者： Jinhie Skarda Rahul Trivedi Logan Su Diego Ahmad-Stein Hyounghan Kwon Seunghoon Han Shanhui Fan Jelena Vučković E.L.Ginzton Laboratory Stanford UniversityStanfordCA 94305USA Max-Planck-Institut fur Quantenoptik Hans-Kopfermann-Str.185748 GarchingGermany Department of electrical and computer engineering University of WashingtonSeattle 98195USA Samsung Advanced Institute of Technology Samsung ElectronicsSuwon-siGyeonggi-do 443-803Republic of Korea

Fast and accurate electromagnetic simulation of large-area metasurfaces remains a major obstacle in automating their *** this paper,we propose a metasurface simulation distribution strategy which achieves a linear reduction in the simulation time with the number of compute *** this distribution strategy with a GPU-based implementation of the Transition-matrix method,we perform accurate simulations and adjoint sensitivity analysis of large-area *** demonstrate ability to perform a distributed simulation of large-area metasurfaces(over 600λ×600λ),while accurately accounting for scatterer-scatterer interactions significantly beyond the locally periodic approximation.

关键词： distribution surfaces scatter

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The Periodic Table of Primes

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Advances in Pure Mathematics 2024年第5期14卷 394-419页

作者： Han-Lin Li Shu-Cherng Fang Way Kuo Department of Computer Science City University of Hong Kong Hong Kong China Department of Industrial and Systems Engineering North Carolina State University Raleigh USA Hong Kong Institute for Advanced Study City University of Hong Kong Hong Kong China

Over millennia, nobody has been able to predict where prime numbers sprout or how they spread. This study establishes the Periodic Table of Primes (PTP) using four prime numbers 2, 3, 5, and 7. We identify 48 integers out of a period 2×3×5×7=210 to be the roots of all primes as well as composites without factors of 2, 3, 5, and 7. Each prime, twin primes, or composite without factors of 2, 3, 5, and 7 is an offspring of the 48 integers uniquely allocated on the PTP. Three major establishments made in the article are the Formula of Primes, the Periodic Table of Primes, and the Counting Functions of Primes and Twin Primes.

关键词： Primes Composites the Periodic Table of Primes

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Generation and manipulation of skyrmions and other topological spin structures with rare metals

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Rare Metals 2022年第7期41卷 2200-2216页

作者： Chu Ye Lin-Lin Li Yun Shu Qian-Rui Li Jing Xia Zhi-Peng Hou Yan Zhou Xiao-Xi Liu Yun-You Yang Guo-Ping Zhao College of Physics and Electronic Engineering Sichuan Normal UniversityChengdu 610068China Center for Magnetism and Spintronics Sichuan Normal UniversityChengdu 610068China Guangdong Provincial Key Laboratory of Optical Information Materials and Technology Guangzhou 510006China Institute for Advanced Materials South China Normal UniversitySouth China Academy of Advanced OptoeletronicsGuangzhou 510006China School of Science and Engineering The Chinese University of Hong KongShenzhen 518172China Department of Electrical and Computer Engineering Shinshu UniversityNagano 380-8553Japan

Skyrmions are nano-scale quasi-particles with topological protection,which have potential applications in next-generation spintronics-based information *** papers have been published to review various aspects of skyrmions,including physics,materials and ***,no review paper has focused on rare metals which play important roles in nucleating and manipulating skyrmions and other topological *** this paper,various roles of rare metals have been classified and summarized,which can tune Curie temperature(TC),Dzyaloshinskii-Moriya interaction(DMI),magnetocrystalline anisotropy,Ruderman-Kittel-Kasuya-Yosida(RKKY)interaction and four-spin interaction so as to trigger the generation of skyrmions and other topological spin *** materials covered include typical B20 crystals,various layered systems with interfacial DMI,frustrated materials,antiferromagnets,ferrimagnets,twodimensional(2D)materials,*** addition,the rare-earth(RE)permanent magnets can provide an energy barrier and enrich the dynamic behaviors of skyrmions,which has also been reviewed.

关键词： Magnetic skyrmions Rare metals Generation and manipulation

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