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2023 Conference on Lasers and Electro-Optics, CLEO 2023

作者： Larocque, Hugo Buyukkaya, Mustafa Atabey Errando-Herranz, Carlos Harper, Samuel Carolan, Jacques Leake, Gerald L. Coleman, Daniel J. Fanto, Michael L. Waks, Edo Englund, Dirk Research Laboratory of Electronics Massachusetts Institute of Technology CambridgeMA02139 United States Department of Electrical and Computer Engineering Institute for Research in Electronics and Applied Physics University of Maryland College ParkMD20742 United States Institute of Physics University ofMunster Munster48149 Germany State University of New York Polytechnic Institute AlbanyNY12203 United States Air Force Research Laboratory Information Directorate RomeNY13441 United States

We introduce hybrid integrated telecom single-photon sources on a commercial foundry multilayer silicon photonic chip. We show above-band and resonant waveguide-coupled single-photon emission tunable via the DC Stark ... 详细信息

ISBN: (纸本)9781957171258

关键词： Photons

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Advancing Offshore Operations with Digital Twin Technology: A Case Study of FLNG Operations in Offshore Environments

Advancing Offshore Operations with Digital Twin Technology: ...

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IEEE Conference on Cybernetics and Intelligent Systems

作者： Siqi Zhang Xiaoling Liang Ruihang Ji Wanyue Jiang Shuzhi Sam Ge University of Toronto and National University of Singapore National University of Singapore Toronto Canada Electrical and Computer Engineering Department National University of Singapore Singapore Institute for Future and Shandong Key Laboratory of Industrial Control Technology Qingdao University Qingdao China

ISBN: (数字)9798350364194

ISBN: (纸本)9798350364200

This paper delineates a meticulous case study centered on the deployment of digital twin technology in Unity3D to augment operations in offshore environments, with a particular emphasis on Floating Liquefied Natural Gas operations. It encompasses the integration of real-time meteorological data, the application of a Proportional-Integral-Derivative controller for refined vessel maneuvering, and the incorporation of an advanced voice navigation interface. The primary objective of this research is to substantially elevate the controllability, predictability, and operational efficacy within the realm of offshore asset management. The findings of this study significantly contribute to the enhancement of strategic decision-making frameworks and propel forward-looking innovations in the offshore sector, culminating in heightened operational efficiency and fortified risk management strategies.

关键词： Technological innovation PI control Navigation Real-time systems Digital twins Liquefied natural gas Asset management

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Heterogeneous Integration of Lithium Niobate and Silicon Photonics for Nonlinear Optics

Heterogeneous Integration of Lithium Niobate and Silicon Pho...

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Conference on Lasers and Electro-Optics (CLEO)

作者： Alexandra Maria Palici Xiyuan Lu Kartik Srinivasan Xinda Lu Fabien Labbe Yunhong Ding Hugo Laroque Ryan Hamerly Carlos Errando-Herranz Minhao Pu Dirk Englund Mikkel Heuck Department of Electrical and Photonics Engineering Technical University of Denmark Lyngby Denmark Microsystems and Nanotechnology Division Physical Measurement Laboratory National Institute of Standards and Technology Gaithersburg Maryland USA Joint Quantum Institute NIST/University of Maryland College Park Maryland USA Research Laboratory of Electronics Massachusetts Institute of Technology Cambridge MA USA Electrical Engineering Mathematics and Computer Science Delft University of Technology Delft Netherlands

We demonstrate a hybrid device consisting of a thin film lithium niobate membrane transfer-printed onto a silicon nitride ring resonator. We measure quality factors in the 10 5 range at telecom wavelengths.

ISBN: (纸本)9798350369311

关键词： Q-factor Lithium niobate Wavelength measurement Multichip modules Silicon nitride Ring lasers Silicon photonics Telecommunications Optical ring resonators Nonlinear optics

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Massive MIMO-OFDM Channel Acquisition with Time-Frequency Phase-Shifted Pilots

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IEEE Transactions on Communications 2024年

作者： Tang, Jinke Gao, Xiqi You, Li Shi, Ding Yang, Jiyuan Xia, Xiang-Gen Zhao, Xinwei Jiang, Peigang Southeast University National Mobile Communications Research Laboratory Nanjing210096 China Purple Mountain Laboratories Nanjing211111 China University Of Delaware Department Of Electrical And Computer Engineering NewarkDE19716 United States Huawei Technologies Co. Ltd Shanghai210206 China

In this paper, we propose a channel acquisition approach with time-frequency phase-shifted pilots (TFPSPs) for massive multi-input multi-output orthogonal frequency division multiplexing (MIMO-OFDM) systems. We first present a triple-beam (TB) based channel tensor model, allowing for the representation of the space-frequency-time (SFT) domain channel as the product of beam matrices and the TB domain channel tensor. By leveraging the specific characteristics of TB domain channels, we develop TFPSPs, where distinct pilot signals are simultaneously transmitted in the frequency and time domains. Then, we present the optimal TFPSP design and provide the corresponding pilot scheduling algorithm. Further, we propose a tensor-based information geometry approach (IGA) to estimate the TB domain channel tensors. Leveraging the specific structure of beam matrices and the properties of TFPSPs, we propose a low-complexity implementation of the tensor-based IGA. We validate the efficiency of our proposed channel acquisition approach through extensive simulations. Simulation results demonstrate the superior performance of our approach. The proposed approach can effectively suppress inter-UT interference with low complexity and limited pilot overhead, thereby enhancing channel estimation performance. Particularly in scenarios with a large number of UTs, the channel acquisition method outperforms existing approaches by reducing the normalized mean square error (NMSE) by more than 8 dB. © 1972-2012 IEEE.

关键词： Mean square error

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A Robotic Device for Measuring Alignment of Elevator Guide Rails 10

A Robotic Device for Measuring Alignment of Elevator Guide R...

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10th International Conference on Control, Automation and Information Sciences, ICCAIS 2021

作者： Niu, Chaoqun Zhao, Dongjie Nemati, Alireza Jiang, Wanyue Li, Xian Ge, Shuzhi Sam Qingdao266071 China Shandong Key Laboratory of Industrial Technology Qingdao University Qingdao266071 China Department of Electrical & Computer Engineering National University of Singapore Singapore117576 Singapore

ISBN: (纸本)9781665440295

Aiming at the problems of low degree of automation, troublesome technical measurement method and low efficiency in the current elevator track deformation detection method, a high degree of automation elevator track quality detection robot is designed and developed in this paper. The robot fully considers practicability and high efficiency in mechanical design and adds a feedback mechanism to the control unit for control optimization, so that it can climb the elevator track quickly and smoothly, and uses robot vision to detect the track deformation, main control principle is to use the computer to smoothly regulate the speed of the motor, to detect the posture of the robot in the climbing process in real-time, and to feed it back to the micro industrial computer for autonomous adjustment, to ensure that the robot runs smoothly on the elevator guide rail at all times. © 2021 IEEE.

关键词： Elevators

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Budget-Constrained Sizing of Renewable and Energy Storage Systems for Farm-Scale Ammonia Production Within the Food-Energy-Water Nexus

Budget-Constrained Sizing of Renewable and Energy Storage Sy...

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IEEE Green Technologies Conference (IEEE-Green)

作者： Xuebo Liu Alex Modarresi Lawryn Kiboma Hongyu Wu John Symons Mary Hill Mike Wiegers Department of Electrical and Computer Engineering Kansas State University Manhattan KS USA Department of Computer Science California State University Northridge CA USA National Renewable Energy Laboratory Golden CO USA Department of Philosophy Center for Cyber-Social Dynamics University of Kansas Lawrence KS USA Department of Geology University of Kansas Lawrence KS USA

In the transition toward sustainable agriculture, farms have emerged as eco-friendly pioneers, harnessing clean hybrid wind and solar systems to improve farm performance. A concern in this paradigm is the effective sizing of renewable energy systems to ensure optimal energy use within budget considerations. This research focuses on optimizing renewable energy sizing in small-scale ammonia production to meet specific farm demands and enhance local resilience, emphasizing the interplay between environmental and economic factors. These findings promise increased energy efficiency and sustainability in this innovative agricultural sector. Additionally, our approach considers small-scale ammonia plant needs and the dynamic relationships between ammonia, water, and farm demands. Sim-ulations demonstrate substantial cost savings in farm electricity consumption. Specifically, scenarios with renewable energy integration in the farm can reduce at least 13% electricity cost compared to a grid-dependent system in the 15-year simulation.

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Robust Beamforming Design and Antenna Selection for Dynamic HRIS-aided MISO Systems

arXiv

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arXiv 2024年

作者： Wang, Jintao Zhou, Binggui Ma, Chengzhi Gong, Shiqi Yang, Guanghua Ma, Shaodan The State Key Laboratory of Internet of Things for Smart City The Department of Electrical and Computer Engineering University of Macau 999078 China The School of Cyberspace Science and Technology Beijing Institute of Technology Beijing100081 China The School of Intelligent Systems Science and Engineering Jinan University Zhuhai519070 China

In this paper, we propose a dynamic hybrid active-passive reconfigurable intelligent surface (HRIS) to enhance multiple-input-single-output (MISO) communications, leveraging the property of dynamically placing active elements. Specifically, considering the impact of hardware impairments (HWIs), we investigate channel-aware configurations of the receive antennas at the base station (BS) and the active/passive elements at the HRIS to improve transmission reliability. To this end, we address the average mean-square-error (MSE) minimization problem for the HRIS-aided MISO system by jointly optimizing the BS receive antenna selection matrix, the reflection phase coefficients, the reflection amplitude matrix, and the mode selection matrix of the HRIS. To overcome the non-convexity and intractability of this problem, we first transform the binary and discrete variables into continuous ones, and then propose a penalty-based exact block coordinate descent (PEBCD) algorithm to alternately solve these subproblems. Numerical simulations demonstrate the significant superiority of our proposed scheme over conventional benchmark schemes. Copyright © 2024, The Authors. All rights reserved.

关键词： Mean square error

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Collaborative Trolley Transportation System with Autonomous Nonholonomic Robots

arXiv

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arXiv 2023年

作者： Xia, Bingyi Luan, Hao Zhao, Ziqi Gao, Xuheng Xie, Peijia Xiao, Anxing Wang, Jiankun Meng, Max Q.-H. Shenzhen Key Laboratory of Robotics Perception and Intelligence Department of Electronic and Electrical Engineering Southern University of Science and Technology Shenzhen China Jiaxing Research Institute Southern University of Science and Technology Jiaxing China Department of Electronic Engineering The Chinese University of Hong Kong Hong Kong Department of Electrical and Computer Engineering The University of Alberta Canada School of Computing National University of Singapore Singapore

— Cooperative object transportation using multiple robots has been intensively studied in the control and robotics literature, but most approaches are either only applicable to omnidirectional robots or lack a complete navigation and decision-making framework that operates in real time. This paper presents an autonomous nonholonomic multi-robot system and an end-to-end hierarchical autonomy framework for collaborative luggage trolley transportation. This framework finds kinematic-feasible paths, computes online motion plans, and provides feedback that enables the multi-robot system to handle long lines of luggage trolleys and navigate obstacles and pedestrians while dealing with multiple inherently complex and coupled constraints. We demonstrate the designed collaborative trolley transportation system through practical transportation tasks, and the experiment results reveal their effectiveness and reliability in complex and dynamic environments. (Video1) Copyright © 2023, The Authors. All rights reserved.

关键词： Multipurpose robots

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RSRP Measurement Based Channel Autocorrelation Estimation for IRS-Aided Wideband Communication

RSRP Measurement Based Channel Autocorrelation Estimation fo...

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2025 IEEE Wireless Communications and Networking Conference, WCNC 2025

作者： Sun, He Zhu, Lipeng Mei, Weidong Zhang, Rui University of Electronic Science and Technology of China National Key Laboratory of Wireless Communications 611731 China School of Science and Engineering Shenzhen Research Institute of Big Data China Chinese University of HongKong Guangdong Shenzhen518172 China National University of Singapore Department of Electrical and Computer Engineering 117583 Singapore

ISBN: (纸本)9798350368369

The passive and frequency-flat reflection of IRS, as well as the high-dimensional IRS-reflected channels, have posed significant challenges for efficient IRS channel estimation, especially in wideband communication systems with significant multi-path channel delay spread. To address these challenges, we propose a novel neural network (NN)-empowered framework for IRS channel autocorrelation matrix estimation in wideband orthogonal frequency division multiplexing (OFDM) systems. This framework relies only on the easily accessible reference signal received power (RSRP) measurements at users in existing wideband communication systems, without requiring additional pilot transmission. Based on the estimates of channel autocorrelation matrix, the passive reflection of IRS is optimized to maximize the average user received signal-to-noise ratio (SNR) over all subcarriers in the OFDM system. Numerical results verify that the proposed algorithm significantly outperforms existing power-measurement-based IRS reflection designs in wideband channels. © 2025 IEEE.

关键词： Signaling

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Differences in Ferroelectric Characteristics of Similar Hafnium Zirconium Oxide Films Studied Using X - Ray Photoelectron Spectroscopy

Differences in Ferroelectric Characteristics of Similar Hafn...

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IEEE National Conference on Aerospace and Electronics (NAECON)

作者： Guillermo A. Salcedo Ahmad E. Islam Tyson C. Back Kevin D. Leedy Timothy Wolfe Department of Electrical and Computer Engineering Air Force Institute of Technology Wright-Patterson AFB OH USA Sensors Directorate Air Force Research Laboratory Wright-Patterson AFB OH USA Materials and Manufaccuring Directorate Air Force Research Laboratory Wright-Patterson AFB OH USA

ISBN: (数字)9798350367621

ISBN: (纸本)9798350367638

The ferroelectric (FE) properties of hafnium zirco-nium oxide $(\text{Hf}_{l-x}\text{Zr}_{x}\mathrm{O}_{2})$ , a material of importance for many electronic applications such as low-power computing and non-volatile memories, are heavily dependent on the Zr content $(x)$ . Here we report that in some cases, samples with the same $x$ display different FE character and these variations can be related to changes in the location of the Zr $3\mathrm{t}1$ and $O Is$ peaks in X-ray photoelectron spectroscopy (XPS) spectra. This suggests that lattice strain and Zr-O bonding variations play a significant role in the FE character of $\text{Hf}_{l-x}\text{Zr}_{x}\mathrm{O}_{2}$ thin films.

关键词： Radio frequency Spectroscopy Zirconium Three-dimensional displays Films Personal digital devices Hafnium

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