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mPose: Environment- and subject-agnostic 3D skeleton posture reconstruction leveraging a single mmWave device

Smart Health 2022年 23卷

作者： Shi, Cong Lu, Li Liu, Jian Wang, Yan Chen, Yingying Yu, Jiadi WINLAB Department of Electrical and Computer Engineering Rutgers University New Brunswick NJ United States Key Laboratory of Blockchain and Cyberspace Governance of Zhejiang Province Zhejiang University Hangzhou China Min H. Kao Department of Electrical Engineering and Computer Science University of Tennessee Knoxville TN United States Department of Computer and Information Sciences Temple University Philadelphia PA United States Department of Computer Science and Engineering Shanghai Jiao Tong University Shanghai China

Human skeleton posture reconstruction is an essential component for human–computer interactions (HCI) in various application domains. Traditional approaches usually rely on either cameras or on-body sensors, which induce privacy concerns or inconvenient practical setups. To address these practical concerns, this paper proposes a low-cost contactless skeleton posture reconstruction system, mPose, which can reconstruct a user's 3D skeleton postures using a single mmWave device. mPose does not require the user to wear any sensors and can enable a broad range of emerging mobile applications (e.g., VR gaming and pervasive user input) via mmWave-5G ready Internet of Things (IoT) devices. Particularly, the system extracts multi-dimensional spatial information from mmWave signals which characterizes the skeleton postures in a 3D space. To mitigate the impacts of environmental changes, mPose dynamically detects the user location and extracts spatial features from the mmWave signals reflected only from the user. Furthermore, we develop a deep regression method with a domain discriminator to learn a mapping between the spatial features and the joint coordinates of human body while removing subject-specific characteristics, realizing robust posture reconstruction across users. Extensive experiments, involving 17 representative body postures, 7 subjects, and 3 indoor environments, show that mPose outperforms contemporary state-of-the-art RF-based solutions with a lower average joint error of only ∼30 mm, while achieving transferability across environments and subjects at the same time. © 2021 Elsevier Inc.

关键词： 3D skeleton posture reconstruction MmWave

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Topological Microlaser with A non-Hermitian Topological Bulk

arXiv

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arXiv 2023年

作者： Li, Zhitong Luo, Xi-Wang Lin, Dayang Gharajeh, Abouzar Moon, Jiyoung Hou, Junpeng Zhang, Chuanwei Gu, Qing Department of Electrical and Computer Engineering The University of Texas at Dallas RichardsonTX75080 United States State Key Laboratory of Information Photonics and Optical Communications School of Science Beijing University of Posts and Telecommunications Beijing100876 China Department of Physics The University of Texas at Dallas RichardsonTX75080 United States CAS Key Laboratory of Quantum Information University of Science and Technology of China Hefei230026 China Department of Electrical and Computer Engineering North Carolina State University RaleighNC27695 United States Department of Physics North Carolina State University RaleighNC27695 United States

Bulk-edge correspondence, with quantized bulk topology leading to protected edge states, is a hallmark of topological states of matter and has been experimentally observed in electronic, atomic, photonic, and many other systems. While bulk-edge correspondence has been extensively studied in Hermitian systems, a non-Hermitian bulk could drastically modify the Hermitian topological band theory due to the interplay between non-Hermiticity and topology;and its effect on bulk-edge correspondence is still an ongoing pursuit. Importantly, including non-Hermicity can significantly expand the horizon of topological states of matter and lead to a plethora of unique properties and device applications, an example of which is a topological laser. However, the bulk topology, and thereby the bulk-edge correspondence, in existing topological edge-mode lasers is not well defined. Here, we propose and experimentally probe topological edge-mode lasing with a well-defined non-Hermitian bulk topology in a one-dimensional (1D) array of coupled ring resonators. By modeling the Hamiltonian with an additional degree of freedom (referred to as synthetic dimension), our 1D structure is equivalent to a 2D non-Hermitian Chern insulator with precise mapping. Our work may open a new pathway for probing non-Hermitian topological effects and exploring non-Hermitian topological device applications. Copyright © 2023, The Authors. All rights reserved.

关键词： Topology

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Local negative permittivity and topological phase transition in polar skyrmions (vol 20, pg 194, 2021)

引用

NATURE MATERIALS 2021年第6期20卷 905-905页

作者： Das, S. Hong, Z. Stoica, V. A. Goncalves, M. A. P. Shao, Y. T. Parsonnet, E. Marksz, E. J. Saremi, S. McCarter, M. R. Reynoso, A. Long, C. J. Hagerstrom, A. M. Meyers, D. Ravi, V. Prasad, B. Zhou, H. Zhang, Z. Wen, H. Gomez-Ortiz, F. Garcia-Fernandez, P. Bokor, J. iniguez, J. Freeland, J. W. Orloff, N. D. Junquera, J. Chen, L. Q. Salahuddin, S. Muller, D. A. Martin, L. W. Ramesh, R. Department of Materials Science and Engineering University of California Berkeley CA USA Department of Physics University of California Berkeley CA USA Materials Sciences Division Lawrence Berkeley National Laboratory Berkeley CA USA Department of Materials Science and Engineering The Pennsylvania State University University Park PA USA Department of Mechanical Engineering Carnegie Mellon University Pittsburgh PA USA Materials Research and Technology Department Luxembourg Institute of Science and Technology (LIST) Esch/Alzette Luxemburg Departamento de Ciencias de la Tierra y Física de la Materia Condensada Universidad de Cantabria Cantabria Campus Internacional Santander Spain Physics and Materials Science Research Unit University of Luxembourg Belvaux Luxembourg School of Applied and Engineering Physics Cornell University Ithaca NY USA Kavli Institute at Cornell for Nanoscale Science Ithaca NY USA National Institute of Standards and Technology Boulder CO USA Advanced Photon Source Argonne National Laboratory Argonne IL USA Department of Electrical Engineering and Computer Sciences University of California Berkeley CA USA

A Correction to this paper has been published: https://***/10.1038/s41563-021-00962-z.

关键词： Titanium compounds

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Design of Energy Modulation Massive SIMO Transceivers via Machine Learning

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Journal of Communications and Information Networks 2020年第3期5卷 358-368页

作者： Muhang Lan Jianhao Huang Han Zhang Chuan Huang National Key Laboratory of Science and Technology on Communications University of Electronic Science and Technology of ChinaChengdu 611731China The Future Network of Intelligence Institute and the School of Science and Engineering the Chinese University of Hong KongShenzhen 518172China Department of Electrical and Computer Engineering University of CaliforniaDavis 95616USA

This paper considers a massive single-input multiple-output(SIMO)system,where multiple singleantenna transmitters simultaneously communicate with a receiver equipped with a large number of *** from the conventional noncoherent transceivers which require a certain level of the statistical information on the channel fading,we propose a joint transceiver design method based on machine learning,requiring a limited number of channel *** the proposed method,the multiple transmitters,the channel,and the receiver are represented with a deep neural network(NN),and an autoencoder is adopted to minimize the end-to-end transmission error ***,the relationship between the number of training samples and the transmission error probability is analyzed based on the confidence interval *** results show that the proposed NN-based transceiver achieves lower transmission error probability in typical scenarios,and is more robust against the channel parameters variation compared with the existing methods.

关键词： neural network(NN) energy modulation massive single-input multiple-output(SIMO) joint transceiver design confidence interval

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Byzantine-Resilient Decentralized Stochastic Optimization with Robust Aggregation Rules

arXiv

引用

arXiv 2022年

作者： Wu, Zhaoxian Chen, Tianyi Ling, Qing School of Computer Science and Engineering Guangdong Provincial Key Laboratory of Computational Science Sun Yat-Sen University Guangdong Guangzhou510006 China Department of Electrical Computer and Systems Engineering Rensselaer Polytechnic Institute TroyNY12180 United States Pazhou Lab Guangdong Guangzhou510330 China

This paper focuses on decentralized stochastic optimization in the presence of Byzantine attacks. During the optimization process, an unknown number of malfunctioning or malicious workers, termed as Byzantine workers, disobey the algorithmic protocol and send arbitrarily wrong messages to their neighbors. Even though various Byzantine-resilient algorithms have been developed for distributed stochastic optimization with a central server, we show that there are two major issues in the existing robust aggregation rules when being applied to the decentralized scenario: disagreement and non-doubly stochastic virtual mixing matrix. This paper provides comprehensive analysis that discloses the negative effects of these two issues, and gives guidelines of designing favorable Byzantine-resilient decentralized stochastic optimization algorithms. Under these guidelines, we propose iterative outlier scissor (IOS), an iterative filtering-based robust aggregation rule with provable performance guarantees. Numerical experiments demonstrate the effectiveness of IOS. The code of simulation implementation is available at ***/Zhaoxian-Wu/IOS. Copyright © 2022, The Authors. All rights reserved.

关键词： Optimization

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Dual Z-scheme Pr2Sn2O7/P@g-C3N4/SnS2 heterojunctions for the removal of tetracycline antibiotic by persulfate activation: Kinetics, thermodynamic parameters, density functional theory, and toxicity studies

引用

Chemical engineering Journal 2024年 479卷

作者： Prasanna, Sanjay Ballur Sakthivel, Rajalakshmi Shanthakumar, Karthik Chimatahalli Shivamurthy, Santhosh Arehalli Lin, Yu-Chien Dhawan, Udesh Liu, Xinke Chung, Ren-Jei Taipei10608 Taiwan Department of Chemistry SJCE JSS Science and Technology University Karnataka570006 India N.M.K.R.V. College for Women Karnataka 560011 India Centre for the Cellular Microenvironment Division of Biomedical Engineering James Watt School of Engineering Mazumdar-Shaw Advanced Research Centre University of Glasgow GlasgowG116EW United Kingdom College of Materials Science and Engineering Chinese Engineering and Research Institute of Microelectronics Shenzhen University Shenzhen518060 China Department of Electrical and Computer Engineering National University of Singapore Singapore 117583 Singapore Taipei10608 Taiwan

In this study, a Pr2Sn2O7/P@g-C3N4/SnS2 ternary nanocomposite photocatalyst is obtained by hydrothermal synthesis followed by mechanical grinding. By separating electrons and holes (e−/h+) effectively through the dual Z-scheme heterojunction and activating persulfate (PS), the heterojunction demonstrated superior visible light-driven catalytic activity. Tetracycline (TC) was degraded (89.48%) in 60 min using 30 mg/L of ternary composite and 30 mg/L of PS. This system displayed the highest pseudo-first-order kinetic constant (0.0989 min−1 and R2 = 0.969). The electron paramagnetic resonance analysis showed that SO4[rad]−, [rad]OH, [rad]O2−, and 1O2 were involved in TC degradation. TC's vulnerability positions and degradation pathways were analyzed using DFT and gas chromatography-mass spectrometry analysis, while toxicity assessment software was used to determine the toxicity of intermediate products. Thus, Pr2Sn2O7/P@g-C3N4/SnS2 was established to be a promising photocatalyst template for pollutant remediation. © 2023 Elsevier B.V.

关键词： Density functional theory

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AlScN High Electron Mobility Transistors: Integrating High Piezoelectric, High K Dielectric, and Ferroelectric Functionality

AlScN High Electron Mobility Transistors: Integrating High P...

引用

BiCMOS and Compound Semiconductor Integrated Circuits and Technology Symposium (BCICTS)

作者： Joseph Casamento Kazuki Nomoto Thai-Son Nguyen Hyunjea Lee Chandrasekhar Savant Lei Li Austin Hickman Takuya Maeda Yu-Tsun Shao Jimy Encomendero Ved Gund Timothy Vasen Shamima Afroz Daniel Hannan David A. Muller Huili Grace Xing Debdeep Jena Department of Materials Science and Engineering Cornell University Ithaca NY USA School of Electrical and Computer Engineering Cornell University Ithaca NY USA Kavli Institute at Cornell for Nanoscale Science Cornell University Ithaca NY USA School of Applied and Engineering Physics Cornell University Ithaca New York USA Northrop Grumman Mission Systems Advanced Technology Laboratory Linthicum Maryland USA Department of Physics Cornell University Ithaca New York USA

This paper presents an overview of the promising physical properties of the aluminum scandium nitride (AlScN) ternary alloy system and its integration in radiofrequency heterostructure high electron mobility transistors (RF HEMTs). Specifically, heterostructures with AlScN demonstrate enhanced piezoelectric response and enhanced relative dielectric permittivity, as well as ferroelectric behavior. These promising physical phenomena are manifested in HEMTs that show larger on current densities compared to aluminum gallium nitride (AlGaN) HEMTs and display ferroelectric behavior. An overlook on future improvements in thin film deposition and device fabrication is discussed to fully maximize the potential devices and integrated circuits incorporating AlScN.

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A Thin Film Barium Titanate-on-Insulator Optoelectronics Platform with Various Photonic Devices

A Thin Film Barium Titanate-on-Insulator Optoelectronics Pla...

引用

CLEO: science and Innovations, S and I 2022

作者： Cao, Yu Ng, Jun Da Lin, Hong-Lin Shao, Jianbo Qi, Luo Siew, Shawn Yohanes Dogheche, Elhadj Danner, Aaron J. Department of Electrical and Computer Engineering National University of Singapore 4 Engineering Drive 3 Singapore117583 Singapore Advanced Micro Foundry 11 Science Park Road Singapore117685 Singapore Microsoft Research 21 Station Road CambridgeCB1 2FB United Kingdom Institute of Electronics Microelectronics and Nanotechnology IEMN DOAE Université Polytechnique Hauts-de-France Valenciennes59309 France

We present a thin-film barium titanate-on-insulator platform and its optical and electrooptic properties, some of which are superior to lithium niobate-on-insulator, and discuss our progress in device fabrication, per... 详细信息

ISBN: (纸本)9781557528209

关键词： Barium titanate

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Stimulated Generation of Indistinguishable Single Photons from a Quantum Ladder System

Stimulated Generation of Indistinguishable Single Photons fr...

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2023 Conference on Lasers and Electro-Optics, CLEO 2023

作者： Sbresny, Friedrich Hanschke, Lukas Schöll, Eva Rauhaus, William Scaparra, Bianca Boos, Katarina Casalengua, Eduardo Zubizarreta Riedl, Hubert del Valle, Elena Finley, Jonathan J. Jöns, Klaus D. Müller, Kai Walter Schottky Institut Department of Electrical and Computer Engineering and MCQST Technische Universitat Miinchen Garching85748 Germany Department of Physics Paderborn University Paderborn33098 Germany Faculty of Science and Engineering University of Wolverhampton WolverhamptonWV1 1LY United Kingdom Departamento de Fisica Teórica de la Materia Condensada andlFIMAC Universidad Autónoma de Madrid Madrid28049 Spain Walter Schottky Institut Department of Physics MCQST Technische Universität München Garching85748 Germany Institute for Advanced Study Technische Universität München Garching85748 Germany

Single photons play a key role for applications in photonic quantum technologies. Here we propose, model and demonstrate a scheme that enables the generation of high purity indistinguishable single photons from a quan... 详细信息

ISBN: (纸本)9781957171258

关键词： Ladders

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Realizing room-temperature ferromagnetism in metal-free graphene through vacancy-assisted hydrogenation

Chain

引用

Chain 2025年第1期2卷 72-80页

作者： Yongjie Xu Dingyi Yang Yu Zhang Gongkai Yuan Yici Zou Zhibo Zhang Yong Wang Yizhang Wu School of Education Jiangsu Open UniversityNanjing 210036China National Laboratory of Solid-State Microstructures Collaborative Innovation Center of Advanced Microstructuresand Jiangsu Provincial Key Laboratory for NanotechnologyNanjing UniversityNanjing 210093China Wide Bandgap Semiconductor Technology Disciplines State Key Laboratory School of MicroelectronicsAcademy of Advanced Interdisciplinary ResearchXidian UniversityXi’an 710071China Department of Physics Shaanxi University of Science and TechnologyXi’an 710021China Department of Applied Physical Sciences The University of North Carolina at Chapel HillChapel HillNC 27514USA Graduate School of Arts and Sciences Georgetown UniversityWashingtonDC 20057USA Department of Computer science and Engineering Michigan State UniversityEast LansingMI 48824USA Institute of Materials Engineering Nanjing UniversityNantong 226019China

Room-temperature ferromagnetism in graphene is a crucial step toward the practical application of spintronic *** hydrogen adsorption on graphene has been shown to induce magnetic moments,the overall efficiency remains low due to the clustering of hydrogen atoms and weak magnetic *** study demonstrates a highly effective vacancy-assisted hydrogenation method to synthesize hydrogenated graphene(HG)with robust room-temperature *** introduction of vacancies inhibits hydrogen clustering,increases magnetic edge atoms,and enhances the coupling between magnetic *** a result,HG exhibits a Curie temperature of 540 K and a saturation magnetization of 0.69 emu/g at 300 *** findings provide a new approach for the efficient hydrogenation of graphene,paving the way for its applications in spintronic devices.

关键词： graphene ferromagnetic hydrogenation vacancy-assisted room-temperature

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