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2021 IEEE Global Communications Conference (GLOBECOM)

作者： Zhaoyuan Shi Xianzhong Xie Sahil Garg Huabing Lu Helin Yang Zehui Xiong School of Computer Science and Technology Chongqing University of Posts and Telecommunications Chongqing China Key Laboratory of Intelligent Perception and Computing of Anhui Province Anqing Normal University Anqing China Ecole de technologie supérieure Université du Québec Montréal Canada School of Electrical and Electronic Engineering Nanyang Technological University 50 Nanyang Avenue Singapore Pillar of Information Systems Technology and Design Singapore University of Technology and Design Singapore

ISBN: (纸本)9781728181059

With the advent of the Internet of Everything era, communication data has exploded, which requires more communication resources, such as frequency, time, and energy. In this context, this paper presents a machine learning-based data packet scheduling scheme to achieve efficient data packet transmission in the 5G/6G communication systems. To minimize the average number of packet overflows (APNO), we propose distributed deep deterministic policy gradient (DDPG)-based algorithm for multidimensional resource scheduling. To improve the algorithm stability and training efficiency, the strategy of centralized training and distributed execution is adopted, and an Action Adjuster is designed. The proposed algorithm enables the multidimensional resource management of the 5G/6G commu-nication systems without any information interaction between each agent. Simulation results show that the proposed Action Adjuster DDPG algorithm achieves faster convergence and less data overflow compared to other benchmark algorithms.

关键词： Training Time-frequency analysis Schedules Machine learning algorithms Scheduling algorithms Simulation Benchmark testing

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design and Implementation of Hybrid Vehicle using Control of DC Electric Motor 54

Design and Implementation of Hybrid Vehicle using Control of...

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54th International Universities Power engineering Conference, UPEC 2019

作者： Hussain, Muhammad Majid Rashid Mustafa, Al Chaudary, Muhammad Akmal Razaq, Abdul University of South Wales Faculty of Computing Engineering and Science Cardiff United Kingdom University of South Wales Centre for Automotive Power Systems Engineering Cardiff United Kingdom Ajman University Department of Electrical and Computer Engineering Ajman United Arab Emirates Abertay University School of Design and Informatics Dundee United Kingdom

ISBN: (纸本)9781728133492

The electric motors and its control technology are key components of hybrid electric vehicles (HEVs). Control of the electric motor is a fundamental issue for traction application in electric vehicles and HEVs. This paper presents the design, development and implementation of a hybrid vehicle using both an electric motor and petrol engine to increase efficiency and decrease carbon footprint. Initially, a prototype of a HEV is designed and the performance values are calculated, before a control system is developed and implemented to control the DC motor speed using a microcontroller as the vehicle's electronic control unit along with simple proportional integral derivative (PID) control using speed as a feedback mechanism. The prototype made incorporated voltage, current, speed and torque sensors for feedback resulting in a closed loop control system which successfully matched the speed input of a user-controlled pedal sensor. A user interface was developed to show the driver of the vehicle key variables such as the revolutions per minute (RPM) of the motor, the speed of the vehicle along with the current being drawn, and the voltage applied to the motor with overall power. To output a variable voltage from the Arduino, a digital output was used with pulse width modulation (PWM) capabilities in order to provide a variable DC voltage to the speed controller. © 2019 IEEE.

关键词： User interfaces

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Erratum to "Leading edge of the a-wave of the electroretinogram and sodium iodate-induced age-related macular degeneration: A Model" [J. Theor. Biol. 592 (2024) 01-17/111879]

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Journal of theoretical biology 2024年 593卷 111912页

作者： Deepak K Pattanaik Vasudevan Lakshminarayanan Nachieketa K Sharma Amir Prasad Sahu Siksha 'O' Anusandhan University Bhubaneswar OR 751030 India. Electronic address: pattanaikdeepak85@***. School of Optometry and Vision Science and Departments of Physics Electrical and Computer Engineering and System Design Engineering University of Waterloo Waterloo Canada. Electronic address: Vengu@uwaterloo.ca. Siksha 'O' Anusandhan University Bhubaneswar OR 751030 India. Electronic address: nachiketasharma@soa.ac.in. Centurion University of Technology and Management Bhubaneswar OR India. Electronic address: amirprasadsahoo@***.

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“Hybrid DAC” Approach to Increasing Dynamic Range and Signal to Noise in IRSP systems

“Hybrid DAC” Approach to Increasing Dynamic Range and Sign...

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IEEE Research and Applications of Photonics In Defense Conference (RAPID)

作者： Garrett A. Ejzak Miguel Hernandez Aaron Landwehr Fouad E. Kiamilev Department of Electrical and Computer Engineering University of Delaware and Chip Design Systems Newark DE USA

We propose and show preliminary test results on a system to improve dynamic range and signal to noise ratio (SNR) in an infrared (IR) light-emitting diode (LED) display system by splitting the digital-to-analog conver... 详细信息

关键词： Transistors Light emitting diodes Capacitors Monitoring Logic gates Synchronization Reservoirs

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SWOT analysis on the transition from Lithium-Ion batteries to Sodium-Ion batteries

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Sustainable Energy Technologies and Assessments 2025年 80卷

作者： Ebrahim Pilali Faraz Forutan Nia Eliyad Yamini Farbod Esmaeilion Walied Alfraidi Alireza Taklifi Davide Astiaso Garcia M. Soltani Department of Mechanical Engineering K.N. Toosi University of Technology Tehran 19967-15433 Iran Faculty of Mechanical Engineering Arak University of Technology Arak Iran Department of Electrical Engineering College of Engineering Imam Mohammad Ibn Saud Islamic University (IMSIU) Riyadh 11564 Saudi Arabia Center of Excellence in Design and Optimization of Energy Systems School of Mechanical Engineering College of Engineering University of Tehran Tehran Iran Advanced Energy Initiative Center K.N. Toosi University of Technology Tehran 14176-14411 Iran Department of Planning Design Technology of Architecture Sapienza University of Rome Via Flaminia 72 00196 Rome Italy Waterloo Institute for Sustainable Energy (WISE) University of Waterloo Waterloo ON N2L 3G1 Canada Department of Electrical and Computer Engineering University of Waterloo Waterloo ON N2L 3G1 Canada Centre for Sustainable Business International Business University Toronto Canada Balsillie School Fellow at the Balsillie School of International Affairs (BSIA) Waterloo ON Canada

The natural and atmospheric circumstances regarding energy resources are experiencing a transformation at the global level due to the exhaustion of the supply of conventional energy resources and climate change. With regards to energy storage systems, lithium-ion batteries (LIBs) have remained the most popular energy storage system technologies because of their high energy density, longer cycle life, and reliability. Nonetheless, the costs and scarcity of lithium as a raw material for REs are unreasonable in the long term. But, new chairs such as sodium-ion batteries (SIBs) are seeing potential benefits over traditional batteries including the availability of Sodium, cost of raw materials, and eco-friendliness. However, there are concerns with SIBs about their less energy density in comparison with LIBs, which needs the invention of expertise. This paper seeks to establish the feasibility of SIBs by analyzing their strengths and weaknesses, opportunities, and threats. Major and minor drawbacks presented in any SIB system are discussed regarding cost performance, safer operation, and environmental gains related to drawbacks such as energy density and cycles per life. Also, important dilemmas regarding LIBs presented in the literature including high efficiency, high power density, and environmentally sound recycling methods are discussed. This study underscores how different conditions may boost SIB performance, commercial feasibility and need for further technical efforts to eliminate existing obstacles so that SIBs can be effectively applied to smarter grids and other renewable energy systems.

关键词： Sodium-ion Battery Lithium-ion Battery SWOT analysis Battery recycling

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Author Correction: Lead federated neuromorphic learning for wireless edge artificial intelligence

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Nature communications 2022年第1期13卷 4838页

作者： Helin Yang Kwok-Yan Lam Liang Xiao Zehui Xiong Hao Hu Dusit Niyato H Vincent Poor Department of Information and Communication Engineering School of Informatics Xiamen University Xiamen China. Strategic Centre for Research in Privacy-Preserving Technologies and Systems Nanyang Technological University Singapore Singapore. Strategic Centre for Research in Privacy-Preserving Technologies and Systems Nanyang Technological University Singapore Singapore. kwokyan.lam@ntu.edu.sg. School of Computer Science and Engineering Nanyang Technological University Singapore Singapore. kwokyan.lam@ntu.edu.sg. Pillar of Information Systems Technology and Design Singapore University of Technology and Design Singapore Singapore. Department of Electrical and Electronic Engineering Nanyang Technological University Singapore Singapore. School of Computer Science and Engineering Nanyang Technological University Singapore Singapore. Department of Electrical and Computer Engineering Princeton University Princeton NJ USA.

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Micro-scale Electrostatic Attach-detach Device for Self-reconfigurable Modular Robotic System

Micro-scale Electrostatic Attach-detach Device for Self-reco...

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design, Test, Integration and Packaging of MEMS/MOEMS

作者： Kei Misumi Gwenn Ulliac Naoto Usami Benoit Piranda Yoshio Mita Akio Higo Julien Bourgeois Department of Electrical Engineering and Information Systems The University of Tokyo Tokyo Japan MN2S FEMTO-ST Besancon France Department of Aeronautics and Astronautics The University of Tokyo Tokyo Japan Computer Science Department the University of Franche-Comté Besancon France Systems Design Lab Graduate School of Engineering The University of Tokyo Tokyo Japan

ISBN: (数字)9781728189017

ISBN: (纸本)9781728189024

We propose a micro-scale electrostatic attach-detach actuator device as an enabling component of micro selfre-configurable modular robotic system (SMR), or programmable matter. The system is composed of a number of identical tiny agents that can adhere each other to form arbitral shapes. The actuator is composed of Au electrodes sandwiched by Parylene-C flexible substrate films. The film is made planar, and the SMR agent is realized by wrapping the actuator film around a shell of a unit robot, made by precise 3-D printing. We have measured the adhesive strength to be 99.3 μN at 50 V, that is sufficient to perform attach demonstration.

关键词： Self-reconfigurable robots electrostatic actuator micro robot programmable matter Microbots Electrostatic actuators Reconfigurable robot actuators Modularity Films Electrostatics bond strength robotic surgical system Printing, Three-Dimensional

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Role of weak interlayer coupling in ultrafast exciton-exciton annihilation in two-dimensional rhenium dichalcogenides

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Physical Review B 2020年第17期101卷 174309-174309页

作者： Sangwan Sim Doeon Lee Jekwan Lee Myungjun Cha Soonyoung Cha Wonhyeok Heo Sungjun Cho Wooyoung Shim Kyusang Lee Jinkyoung Yoo Rohit P. Prasankumar Hyunyong Choi Moon-Ho Jo Division of Electrical Engineering Hanyang University Ansan 15588 Korea Center for Artificial Low Dimensional Electronic Systems Institute for Basic Science (IBS) Pohang 37673 Korea Department of Electrical and Computer Engineering University of Virginia Charlottesville Virginia 22903 USA Department of Physics and Astronomy Institute of Applied Physics Seoul National University Seoul 08826 Korea School of Electrical and Electronic Engineering Yonsei University Seoul 03722 Korea Department of Materials Science and Engineering Yonsei University Seoul 03722 Korea Departments of Materials Science and Engineering University of Virginia Charlottesville Virginia 22903 USA Center for Integrated Nanotechnologies Los Alamos National Laboratory Los Alamos New Mexico 87545 USA Department of Materials Science and Engineering Pohang University of Science and Technology (POSTECH) Pohang 37673 Korea

Strong interactions between excitons are a characteristic feature of two-dimensional (2D) semiconductors, determining important excitonic properties, such as exciton lifetime, coherence, and photon-emission efficiency. Rhenium disulfide (ReS2), a member of the 2D transition-metal dichalcogenide (TMD) family, has recently attracted great attention due to its unique excitons that exhibit excellent polarization selectivity and coherence features. However, an in-depth understanding of exciton-exciton interactions in ReS2 is still lacking. Here we used ultrafast pump-probe spectroscopy to study exciton-exciton interactions in monolayer (1L), bilayer (2L), and triple layer ReS2. We directly measure the rate of exciton-exciton annihilation, a representative Auger-type interaction between excitons. It decreases with increasing layer number, as observed in other 2D TMDs. However, while other TMDs exhibit a sharp weakening of exciton-exciton annihilation between 1L and 2L, such behavior was not observed in ReS2. We attribute this distinct feature in ReS2 to the relatively weak interlayer coupling, which prohibits a substantial change in the electronic structure when the thickness varies. This work not only highlights the unique excitonic properties of ReS2 but also provides novel insight into the thickness dependence of exciton-exciton interactions in 2D systems.

关键词： Excitons Ultrafast phenomena Transition metal dichalcogenides Ultrafast pump-probe spectroscopy

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Hybrid Oscillator-Qubit Quantum Processors: Simulating Fermions, Bosons, and Gauge Fields

arXiv

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arXiv 2024年

作者： Crane, Eleanor Smith, Kevin C. Tomesh, Teague Eickbusch, Alec Martyn, John M. Kühn, Stefan Funcke, Lena DeMarco, Michael Austin Chuang, Isaac L. Wiebe, Nathan Schuckert, Alexander Girvin, Steven M. Department of Physics Co-Design Center for Quantum Advantage Massachusetts Institute of Technology CambridgeMA02139 United States Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology CambridgeMA02139 United States Joint Quantum Institute Joint Center for Quantum Information and Computer Science University of Maryland NIST College ParkMD20742 United States Brookhaven National Laboratory UptonNY11973 United States Yale Quantum Institute PO Box 208 334 17 Hillhouse Ave New HavenCT06520-8263 United States Departments of Applied Physics and Physics Yale University New HavenCT06511 United States Department of Computer Science Princeton University PrincetonNJ08544 United States Infleqtion ChicagoIL60604 United States Center for Theoretical Physics Massachusetts Institute of Technology CambridgeMA02139 United States The NSF AI Institute for Artificial Intelligence and Fundamental Interactions CQTA Deutsches Elektronen-Synchrotron DESY Platanenallee 6 Zeuthen15738 Germany University of Bonn Nussallee 14-16 Bonn53115 Germany Department of Computer Science University of Toronto Canada Pacific Northwest National Laboratory RichlandWA United States Canadian Institute for Advanced Studies Toronto Canada

We develop a hybrid oscillator-qubit processor framework for quantum simulation of strongly correlated fermions and bosons that avoids the boson-to-qubit mapping overhead encountered in qubit hardware. This framework gives exact decompositions of particle interactions such as density-density terms and gauge-invariant hopping, as well as approximate methods based on the Baker-Campbell Hausdorff formulas including the magnetic field term for the U(1) quantum link model in (2 + 1)D. We use this framework to show how to simulate dynamics using Trotterisation, perform ancilla-free partial error detection using Gauss's law, measure non-local observables, estimate ground state energies using a oscillator-qubit variational quantum eigensolver as well as quantum signal processing, and we numerically study the influence of hardware errors in circuit QED experiments. To show the advantages over all-qubit hardware, we perform an end-to-end comparison of the gate complexity for the gauge-invariant hopping term and find an improvement of the asymptotic scaling with the boson number cutoff S from O(log(S)2) to O(1) in our framework as well as, for bosonic matter, a constant factor improvement of better than 104. We also find an improvement from O(log(S)) to O(1) for the U(1) magnetic field term. While our work focusses on an implementation in superconducting hardware, our framework can also be used in trapped ion, and neutral atom hardware. This work establishes digital quantum simulation with hybrid oscillator-qubit hardware as a viable and advantageous method for the study of qubit-boson models in materials science, chemistry, and high-energy physics. Copyright © 2024, The Authors. All rights reserved.

关键词： Ground state

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Optical Interconnects using Single-Mode and Multi-Mode VCSEL and Multi-Mode Fiber

Optical Interconnects using Single-Mode and Multi-Mode VCSEL...

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Optical Fiber Communication (OFC) Conference

作者： N. N. Ledentsov V. A. Shchukin V. P. Kalosha N. Ledentsov L. Chorchos J. P. Turkiewicz U. Hecht P. Kurth F. Gerfers J. Lavrencik S. Varughese S. E. Ralph VI Systems GmbH Berlin Germany Warsaw University of Technology Warsaw Poland Mixed Signal Circuit Design Technische Universität Berlin Berlin Germany Department of Electrical and Computer Engineering Georgia Institute of Technology Atlanta GA USA

Single mode (SM) VCSELs, produced in industrial 4” technology, are suitable for 100Gb/s PAM2 and >160Gb/s PAM4 data transmission. >107Gb/s transmission over 1km of multimode (MM) fiber at 850nm and 910nm is rea... 详细信息

ISBN: (数字)9781943580712

ISBN: (纸本)9781728167626

关键词： Bragg reflectors Multimode fibers Optical amplifiers Optical feedback Optical interconnects Vertical cavity surface emitting lasers

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