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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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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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A comparative study of eight human auditory models of monaural processing

arXiv

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arXiv 2021年

作者： Vecchi, Alejandro Osses Varnet, Léo Carney, Laurel H. Dau, Torsten Bruce, Ian C. Verhulst, Sarah Majdak, Piotr Laboratoire des systèmes perceptifs Département d'études cognitives École Normale Supérieure PSL University CNRS Paris France Departments of Biomedical Engineering and Neuroscience University of Rochester RochesterNY United States Hearing Systems Section Department of Health Technology Technical University of Denmark Lyngby Denmark Department of Electrical and Computer Engineering McMaster University HamiltonON Canada Hearing Technology group WAVES Department of Information Technology Ghent University Ghent Belgium Acoustics Research Institute Austrian Academy of Sciences Vienna Austria

A number of auditory models have been developed using diverging approaches, either physiological or perceptual, but they share comparable stages of signal processing, as they are inspired by the same constitutive parts of the auditory system. We compare eight monaural models that are openly accessible in the Auditory Modelling Toolbox. We discuss the considerations required to make the model outputs comparable to each other, as well as the results for the following model processing stages or their equivalents: Outer and middle ear, cochlear filter bank, inner hair cell, auditory nerve synapse, cochlear nucleus, and inferior colliculus. The discussion includes a list of recommendations for future applications of auditory models. © 2021, CC BY-NC-SA.

关键词： Physiological models

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Jamming-assisted proactive eavesdropping over two suspicious communication links

arXiv

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arXiv 2019年

作者： Zhang, Haiyang Duan, Lingjie Zhang, Rui Engineering Systems and Design Pillar Singapore University of Technology and Design Singapore487372 Singapore Department of Electrical and Computer Engineering National University of Singapore Singapore117583 Singapore

This paper studies a new and challenging wireless surveillance problem where a legitimate monitor attempts to eavesdrop two suspicious communication links simultaneously. To facilitate concurrent eavesdropping, our multi-antenna legitimate monitor employs a proactive eavesdropping via jamming approach, by selectively jamming suspicious receivers to lower the transmission rates of the target links. In particular, we are interested in characterizing the achievable eavesdropping rate region for the minimum-mean-squared-error (MMSE) receiver case, by optimizing the legitimate monitor's jamming transmit covariance matrix subject to its power budget. As the monitor cannot hear more than what suspicious links transmit, the achievable eavesdropping rate region is essentially the intersection of the achievable rate region for the two suspicious links and that for the two eavesdropping links. The former region can be purposely altered by the monitor's jamming transmit covariance matrix, whereas the latter region is fixed when the MMSE receiver is employed. Therefore, we first analytically characterize the achievable rate region for the two suspicious links via optimizing the jamming transmit covariance matrix and then obtain the achievable eavesdropping rate region for the MMSE receiver case. In addition, as the achievable rate region for suspicious links is in general non-convex, we also propose a time-sharing based jamming strategy to enlarge this region and characterize the corresponding achievable eavesdropping rate region for the MMSE receiver case. Furthermore, we also extend our study to the MMSE with successive interference cancellation (MMSE-SIC) receiver case and characterize the corresponding achievable eavesdropping rate region by jointly optimizing the time-sharing factor between different decoding orders. Finally, numerical results are provided to corroborate our analysis and examine the eavesdropping performance. Copyright © 2019, The Authors. All rights reserv

关键词： Jamming

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