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Electron–phonon interaction toward engineering carrier mobility of periodic edge structured graphene nanoribbons

Scientific Reports 2023年第1期13卷 1-10页

作者： Hsu, Teng-Chin Wu, Bi-Xian Lin, Rong-Teng Chien, Chia-Jen Yeh, Chien-Yu Chang, Tzu-Hsuan Graduate Institute of Electronics Engineering (GIEE) National Taiwan University Taipei Taiwan Department of Materials Science and Engineering National Taiwan University Taipei Taiwan Department of Electrical Engineering National Taiwan University Taipei Taiwan

Graphene nanoribbons have many extraordinary electrical properties and are the candidates for semiconductor industry. In this research, we propose a design of Coved GNRs with periodic structure ranged from 4 to 8 nm or more, of which the size is within practical feature sizes by advanced lithography tools. The carrier transport properties of Coved GNRs with the periodic coved shape are designed to break the localized electronic state and reducing electron–phonon scattering. In this way, the mobility of Coved GNRs can be enhanced by orders compared with the zigzag GNRs in same width. Moreover, in contrast to occasional zero bandgap transition of armchair and zigzag GNRs without precision control in atomic level, the Coved GNRs with periodic edge structures can exclude the zero bandgap conditions, which makes practical the mass production process. The designed Coved-GNRs is fabricated over the Germanium (110) substrate where the graphene can be prepared in the single-crystalline and single-oriented formants and the edge of GNRs is later repaired under "balanced condition growth" and we demonstrate that the propose coved structures are compatible to current fabrication facility. © 2023, The Author(s).

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Frequency-Voltage-var Function for VFD in Oil and Gas Platform with Wind Power

Frequency-Voltage-var Function for VFD in Oil and Gas Platfo...

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IEEE Annual Southern Power electronics Conference (SPEC)

作者： Kassiane de Sousa Medeiros Lorrana Faria da Rocha João Marcus Soares Callegari Danilo Iglesias Brandao Graduate Program in Electrical Engineering Universidade Federal de Minas Gerais Belo Horizonte Brazil Department of Electric Energy Norwegian University of Science and Technology Trondheim Norway

Renewable energy resources emerge as a sustainable alternative to augmenting the energy supply of Floating Production Storage and Offloading (FPSO) platforms. However, the increased generation based on converter-interfaced energy decreases the system-equivalent inertia constant, which becomes more susceptible to frequency deviations. This paper proposes and evaluates the performance of the combined frequency-voltage-var control to mitigate frequency variation in a typical FPSO unit with penetration of wind power systems. The control functions are communication-free and embedded in two active front-end variable frequency drives (AFE- VFDs) set on water injection pumps. The FPSO's electrical power system model is developed in MATLAB/Simulink®. Comparative results with the AFE-VFD equipped with volt-var, freq-var, and combined freq-volt-var functions are shown to highlight the merits of the proposed solution.

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Evolutionary Trends of Intelligent IoT Networking for Commercial and Industrial Use Cases

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中国通信（英文版） 2023年第8期20卷前插1-前插4页

作者： Shuai Han Rong Bo Nadra Guizani Sai Xu Ruoyu Su Liang Xiao Cheng Li Department of Electronics and Communication Engineering Harbin Institute of Technology Communications Research Centre Canada Engineering program and the computing Research Association School of Cybersecurity Northwestern Polytechnical UniversityXi'anChina Nanjing University of Posts and Telecommunications Department of Informatics and Communication Engineering Xiamen Univer- sityFujianChina Department of Electrical and Computer Engineering of Memorial University St.John'sCanada

The intelligent Internet of Things(IIoT)is one of the key enablers for the digital transformation of traditional industries towards Industry *** services have diversified requirements due to the nature of their commercial and industrial *** various devices in IIoT environments have their unique properties in terms of resource limita-tions,network lifetimes,and application Quali-ty-of-Service(QoS)requirements which affect the performance under such applications ***,IoT devices typically have constrained power,storage,computing,high latency,massive multiple access and communications resources which limit the performance of IIoT for commercial and industrial Use *** the other hand,devices used in IIoT were not initially designed with security in mind and they had been considered *** response to the above challenges,domestic and foreign scholars have gradually carried out research on network architecture,collaborative scheduling strategy,energy supply technology,resource man-agement,and ***,the research on IIoT is still in its infancy,and has not yet formed comprehen-sive and systematic theoretical methods and technical standards.

关键词： Special issues and sections Internet of Things Intelligent systems Commercialization Requirements engineering Industrial engineering

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A novel polished conical silicon-cored-fiber based edge coupler for silicon photonics

A novel polished conical silicon-cored-fiber based edge coup...

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Optoelectronics and Communications Conference, OECC

作者： Sung-Pu Yang Chao-Hsin Wu Lon A. Wang Graduate Institute of Photonics and Optoelectronics National Taiwan University Taipei Taiwan Graduate Institute of Electronics Engineering National Taiwan University Taipei Taiwan Graduate School of Advanced Technology National Taiwan University Taipei Taiwan Department of Electrical Engineering National Taiwan University Taipei Taiwan

A silicon-cored-fiber (SCF) is proposed for coplanar light coupling from an incoming fiber to a silicon waveguide. The simulation results show that an optimized polished conical SCF coupler can have high coupling effi...

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Control of magnetic transition of ZnO:Co grown by RF-sputter using post-annealing

Control of magnetic transition of ZnO:Co grown by RF-sputter...

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Industrial electrical and electronics (ICIEE), International Conference on

作者： Agusutrisno Marlis Nurut Naoto Yamashita Kunihiro Kamataki Kazunori Koga Naho Itagaki Masaharu Shiratani Department of electronics Graduate School of Information Science and Electrical Engineering Kyushu University Fukuoka Japan Department of I &E Visionaries Faculty of Information Science and Electrical Engineering Kyushu University Fukuoka Japan Department of electronics Faculty of Information Science and Electrical Engineering Kyushu University Fukuoka Japan

ISBN: (纸本)9781665486231

Ferromagnetic semiconductor has attracted much attention for the application of spintronic devices, which will bring next generation of the information technology. Cobalt-doped Zinc Oxides (ZnO: Co) is strong candidate of this material group. The ZnO: Co films were grown on a silicon substrate (100) at room temperature by radio-frequency (rf) sputtering deposition and followed by post-annealing treatment for 3 hours at 400°C and 800°C in the air. The transition from paramagnetic to ferromagnetic occurs after annealing at 400°C, and the properties return to paramagnetic like as-deposition when the temperature rises to 800°C. The XRD measurement of ZnO: Co films exhibited a wurtzite structure in the (002) plane and was free from secondary phases. Then, post-annealing at 400°C due to shift peak and decrease oxygen element, meanwhile the crystallinity significantly up to 800°C.

关键词： Temperature measurement Radio frequency Temperature II-VI semiconductor materials Films Zinc oxide Silicon

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First Demonstration of HZO-LNOI Integrated Ferroelectric Electro-Optic Modulator and Memory to Enable Reconfigurable Photonic Systems

First Demonstration of HZO-LNOI Integrated Ferroelectric Ele...

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International Electron Devices Meeting (IEDM)

作者： Zefeng Xu Chun-Kuei Chen Hong-Lin Lin Yuan Gao Wei Ke Baochang Xu Pavel Dmitriev Carlan Arbiz Evgeny Zamburg Steven Touzard Xinlun Cai James Lee Suresh Venkatesan Aaron Danner Aaron Voon-Yew Thean Department of Electrical and Computer Engineering National University of Singapore (NUS) Integrative Sciences and Engineering Program NUS Graduate School Singapore Next-Generation Hybrid μ-Electronics Center (SHINE) Singapore School of Electronics and Information Technology Sun Yat-Sen University China 510275 Singapore Centre for Quantum Technologies NUS POET Technologies

We have successfully demonstrated, for the first time, an innovative back-end-of-line (BEOL) compatible electro-optic modulator and memory (EOMM) based on Lithium Niobate on Insulator (LNOI) micro-ring resonator (MRR) integrated with Ferroelectric Hafnium Zirconate Hf 0.5 Zr 0.5 O (HZO) non-volatile analog memory. High non-volatile memory and modulation performances are both achieved in a single compact device, exhibiting high extinction ratio of 13.3 dB, excellent efficiency of 66pm/V, stable nine-state switching, record-high endurance exceeding 10 9 cycles. This is accomplished by utilizing Pockels effect in LNOI, induced by electric-field effect from remnant HZO ferroelectric polarization. We studied the system implementation of reconfigurable chiplet-interposer photonic interconnect, enabled by the EOMM and EOMM with hybrid thermal-optical modulation. Our model shows a potential 70% energy efficiency improvement over conventional electrical interposer interconnect. We have also tested the integration of the EOMM with POET technologies’ 400G Tx/Rx optical interposer chip and studied a limited scale demonstration of the EOMM device.

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Mxene/Polydimethylsiloxane (PDMS) Based Implantable and Flexible Bioelectrodes for Neural Sensing

Mxene/Polydimethylsiloxane (PDMS) Based Implantable and Flex...

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Advances in Science and engineering Technology International Conferences (ASET)

作者： Kashif Rast Baz Khan Amani Al-Othman Hasan Al-Nashash Mohammad Al-Sayah Biomedical Engineering Graduate Program American University of Sharjah Sharjah UAE Department of Chemical and Biological Engineering American University of Sharjah Sharjah UAE Department of Electrical Engineering American University of Sharjah Sharjah UAE Chemistry and Environmental Sciences American University of Sharjah Sharjah UAE

Research applications of neural sensing and muscle stimulation have been advanced by the development of bioelectrodes that are biocompatible, flexible and long lasting. The existing metallic made bioelectrodes exhibit extremely high electrochemical resistances that would interfere with the neural-electrode bridge and suffer from mechanical and immunological mismatch. Novel, flexible, implantable bioelectrodes based on MXenes (Ti 3 C 2 ) and Polydimethylsiloxane (PDMS) composite are proposed. Mxenes possess the advantage of having metallic ultra-conductive transition metals consisting of large groups of carbides, nitrides, or carbonitrides, while PDMS has inherent biostability, flexibility and biocompatibility. In the current research, PDMS has been used as the supporting matrix for conductive fillers such as PMMA, PEDOT, and Mxenes. A series of characterization techniques were performed such as Electrochemical Impedance Spectroscopy (EIS), Cyclic Voltammetry (CV) and mechanical testing. The average results of triplicate samples exhibited samples' bulk impedance of 0.913 kΩ, an impedance of 1.612 MΩ, at 1 kHz frequency and a conductivity of 1.41x10 -4 S/cm, charge storage capacity of 0.056 mC/cm 2 and Young's modulus of 3.81 MPa.

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Hybrid Machine Learning Approach for Enhanced Vulnerability Detection in Cloud Environments Using NIST and MITRE Frameworks 5

Hybrid Machine Learning Approach for Enhanced Vulnerability ...

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5th International Conference on Advanced Research in Computing, ICARC 2025

作者： Lasantha, N W Chanaka Maduranga, M.W.P. Abeysekara, Ruvan Tilwari, Valmik Chakraborty, Nilotpal Sharma, Debashree Iic University of Technology Faculty of Graduate Studies Phnom Penh Cambodia University of Sri Jayewardenepura Department of Electrical and Electronic Engineering Nugegoda Sri Lanka Bcas Campus Faculty of Computing Colombo Sri Lanka Indian Institute of Information Technology Department of Computer Science Engineering Guwahati India Indian Institute of Information Technology Department of Electronics & Communication Engineering Guwahati India

ISBN: (纸本)9798331530983

Cloud security is challenged by constant adaptive cyber threats and traditional detection methods lack real time adaptability. In this paper, we propose a new hybrid ML approach stitching data from National Institute of Standards and Technology (NIST) and MITRE Adversarial Tactics, Techniques and Common Knowledge (ATT&CK) databases together. In contrast to existing methods, this framework combines, in unique and unprecedented fashion, ensemble ML models and Realtime data processing for increased detection accuracy and reduced false positives. This approach addresses specific challenges in the cloud environments and by leveraging standardised frameworks, it offers actionable audiences for efficient and effective vulnerability management process. The framework is validated by the experimental results which prove its robustness to evolution of the cybersecurity demands. © 2025 IEEE.

关键词： Cyber attacks

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Analysis of loss tangent in current transformers using the finite element method

Analysis of loss tangent in current transformers using the f...

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23rd International Symposium on High Voltage engineering (ISH 2023)

作者： Antonio F. Leite Neto Edson G. Guedes Pablo B. Vilar George R. S. Lira Filipe L. M. Andrade João Victor J. Melo Almir C. S. Junior Ana C. F. Marotti André I. Costa João Paulo A. Souza Electrical Engineering Graduate Program Federal University of Campina Grande Campina Grande Brazil Department of Electrical Engineering Federal University of Campina Grande Campina Grande Brazil Department of Electrical Engineering Federal Institute of Paraiba Patos Brazil Eletrobras Furnas Electric Power Furnas Rio de Janeiro Brazil Concert Concert Technologies Belo Horizonte Brazil

ISBN: (数字)9781839539923

Failures in Current Transformers (CTs) can have a significant financial impact on utilities, causing revenue loss, service interruptions, and even damage to nearby equipment. To minimize the effects of CT degradation on the electrical system, predictive techniques and continuous monitoring are essential. One such tool that can aid in the supervision and diagnosis of equipment in service is the loss tangent. This parameter is directly related to the aging and degradation of electrical insulation, making it a useful indicator of possible failures in CTs. Therefore, this work aims to perform computer simulations using the finite element method (FEM) to simulate the effect of oil and paper degradation on the loss tangent values of a 230 kV current transformer. To achieve this, the COMSOL Multiphysics® software was used to verify the loss tangent as a function of the conductivity of parameters correlated to the CT dielectric. The results of the simulations show that the degradation of oil and paper substantially increases the value of the loss tangent. Additionally, it was found that the simultaneous or individual degradation of oil and paper have different effects on the loss tangent values obtained. The findings of this study demonstrate the usefulness of loss tangent as a tool for the diagnosis and supervision of electrical equipment in service.

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A Review on Ranking of Z-numbers

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Journal of Computer Science Research 2022年第2期4卷 1-12页

作者： Fırat Bilgin Musa Alci Graduate School of Natural and Applied Science Ege UniversityIzmir35040Turkey Electrical and Electronics Engineering Department Ege UniversityIzmir35040Turkey

There are numerous studies about Z-numbers since its inception in *** Z-number concept reflects human ability to make rational decisions,Z-number based multi-criteria decision making problems are one of these *** the problem is translated from linguistic information into Z-number domain,the important question occurs that which Z-number should be *** answer this question,several ranking methods have been *** compare the performances of these methods,benchmark set of fuzzy Z-numbers has been created in *** are relatively new methods that their performances are not examined yet on this benchmark *** this paper,we worked on these studies which are relative entropy based Z-number ranking method and a method for ranking discrete *** authors tried to examine their performances on the benchmark problem and compared the results with the other ranking *** results are consistent with the literature,*** advantages and the drawbacks of the methods are presented which can be useful for the researchers who are interested in this area.

关键词： Fuzzy Z-numbers Ranking discrete Z-numbers Ranking of Z-numbers Relative entropy based ranking

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