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Smart World Congress (SWC), IEEE

作者： Yehui Shi Jianhong Shi Yihong Qi Yunlong Luo Hanchun Yang Chenfeng Wu Yanbo Ma Alex Qi School of Sensing Science and Engineering &Shanghai Jiao Tong University Shanghai China State Key Laboratory of Advanced Optical Communication Systems and Networks &Institute of Quantum Sensing and Information Processing& School of Sensing Science and Engineering& Shanghai Jiao Tong University Shanghai China Shanghai Jiao Tong University Shanghai China Pontosense Inc. 20 De Boers Dr Suite 514 Toronto ON Canada

ISBN: (数字)9798331520861

ISBN: (纸本)9798331520878

In recent years, incidents of children or dogs being left in vehicles and subsequently dying have garnered significant attention from both the public and regulatory bodies. Due to the varying nature of rescue methods, environmental conditions, and other factors, accurately identifying children and dogs is a crucial component of Child Presence Detection (CPD) in vehicle cabins. This paper employs frequency-modulated continuous wave (FMCW) radar to extract features through respiration detection and motion detection, and utilizes machine learning models to distinguish between children and dogs, thereby enhancing the accuracy and reliability of the detection system. The proposed methodology combines respiratory and motion features to achieve precise differentiation between children and dogs, which is crucial for appropriate safety responses, health interventions, and legal actions.

关键词： Pediatrics Accuracy Machine learning algorithms Target recognition Machine learning Dogs Feature extraction Motion detection Reliability Vehicle dynamics

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Multi-scale Sparse Representation-Based Shadow Inpainting for Retinal OCT Images

arXiv

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arXiv 2022年

作者： Tang, Yaoqi Li, Yufan Liu, Hongshan Li, Jiaxuan Jin, Peiyao Gan, Yu Ling, Yuye Su, Yikai John Hopcroft Center for Computer Science Shanghai Jiao Tong University Shanghai200240 China Department of Electrical and Computer Engineering The University of Alabama AL35487 United States Department of Ophthalmology Shanghai General Hospital Shanghai Jiao Tong University Shanghai200080 China State Key Lab of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiao Tong University Shanghai200240 China

Inpainting shadowed regions cast by superficial blood vessels in retinal optical coherence tomography (OCT) images is critical for accurate and robust machine analysis and clinical diagnosis. Traditional sequence-based approaches such as propagating neighboring information to gradually fill in the missing regions are cost-effective. But they generate less satisfactory outcomes when dealing with larger missing regions and texture-rich structures. Emerging deep learning-based methods such as encoder-decoder networks have shown promising results in natural image inpainting tasks. However, they typically need a long computational time for network training in addition to the high demand on the size of datasets, which makes it difficult to be applied on often small medical datasets. To address these challenges, we propose a novel multi-scale shadow inpainting framework for OCT images by synergically applying sparse representation and deep learning: sparse representation is used to extract features from a small amount of training images for further inpainting and to regularize the image after the multi-scale image fusion, while convolutional neural network (CNN) is employed to enhance the image quality. During the image inpainting, we divide preprocessed input images into different branches based on the shadow width to harvest complementary information from different scales. Finally, a sparse representation-based regularizing module is designed to refine the generated contents after multi-scale feature aggregation. Experiments are conducted to compare our proposal versus both traditional and deep learning-based techniques on synthetic and real-world shadows. Results demonstrate that our proposed method achieves favorable image inpainting in terms of visual quality and quantitative metrics, especially when wide shadows are presented. © 2022, CC BY.

关键词： Image fusion

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A Mixed-Signal Framework for Modelling Fourier-Domain optical Coherence Tomography

A Mixed-Signal Framework for Modelling Fourier-Domain Optica...

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Asia communications and Photonics Conference and Exhibition (ACP)

作者： Yuye Ling Mengyuan Wang Yu Gan Xinwen Yao Leopold Schmetterer Chuanqing Zhou Yikai Su John Hopcroft Center for Computer Science Shanghai Jiao Tong University Shanghai China University of Alabama AL USA Singapore Eye Research Institute Singapore National Eye Centre Singapore School of Chemical and Biomedical Engineering Nanyang Technological University Singapore School of Biomedical Engineering Shanghai Jiao Tong University Shanghai China State Key Lab of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University Shanghai China

We investigate the signal digitization procedure in FD-OCT and propose a novel mixed-signal framework to model its image formation. It turns out FD-OCT is a shift-variant system, if conventional IDFT is used to recons... 详细信息

ISBN: (数字)9781943580828

ISBN: (纸本)9781728176567

关键词： optical coherence tomography Two dimensional displays Asia optical fiber communication Image reconstruction Photonics

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Energy-Efficient Radio Resource and Power Allocation for Device-to-Device communication Underlaying Cellular networks

Energy-Efficient Radio Resource and Power Allocation for Dev...

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International Conference on Wireless communications and Signal Processing

作者： Feiran Wang Chen Xu Lingyang Song Zhu Han Baoxian Zhang State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Engineering and Computer Science Peking University Beijing China Electrical and Computer Engineering Department University of Houston Houston USA Graduate University of Chinese Academy of Sciences Beijing China

ISBN: (纸本)9781467358309

Device-to-device (D2D) communication underlaying cellular networks brings significant benefits to resource utilization, improving user's throughput and extending battery life of user equipments. However, the allocation of radio resources and power to D2D communication needs elaborate coordination, as D2D communication causes interference to cellular networks. In this paper, we propose a novel joint radio resource and power allocation scheme to improve the performance of the system in the uplink period. Energy efficiency is considered as our optimization objective since devices are handheld equipments with limited battery life. We formulate the the allocation problem as a reverse iterative combinatorial auction game. In the auction, radio resources occupied by cellular users are considered as bidders competing for D2D packages and their corresponding transmit power. We propose an algorithm to solve the allocation problem as an auction game. We also perform numerical simulations to prove the efficacy of the proposed algorithm.

关键词： Energy-Efficient Radio Resource

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Understanding Bandwidth Enhancement of All-optical Turbo-Switch

Understanding Bandwidth Enhancement of All-Optical Turbo-Swi...

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International Conference on Transparent optical networks

作者： Xuelin Yang Peng Zhou Xiaonan Hu Weisheng Hu Yong Liu State Key Lab of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University Shanghai 200240 P.R. China School of Optoelectronic Information University of Electronic Science and Technology of China Chengdu 610054 P.R. China

ISBN: (纸本)9781479956029

We propose a detailed frequency-domain model of the all-optical turbo-switch incorporating two cascaded semiconductor optical amplifiers (SOAs) with a broad band-pass optical filter in between the SOAs. The frequency-domain SOA model has taken the spatial inhomogeneity of the saturated SOA gain associated with the pump optical field into consideration for the first time. The simulations based on the model have been presented to understand the reason of the bandwidth enhancement and to predict the 3-dB bandwidth of frequency response of the turbo-switch. With the optimization of the optical powers, waveguide loss and a delayed-interferometer, the 3-dB bandwidth of turbo-switch can reach up to 270 GHz.

关键词： semiconductor optical amplifier all-optical signal processing high-speed switches

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Tailoring the Anomalous Hall Effect in Van Der Waals Ferromagnet Fe3gete2

SSRN

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SSRN 2024年

作者： Wu, Kaile Wang, Qin Wang, Junshan Jiang, Jiaolin Zhao, Tian Zhao, Dong Han, Dan Quan, Zhiyong Ma, Zongmin Wang, Haomin Sang, Shengbo Ge, Yang Shanxi Key Laboratory of Micro Nano Sensors & Artificial Intelligence Perception College of Electronic Information and Optical Engineering Taiyuan University of Technology Taiyuan030024 China Key Lab of Advanced Transducers and Intelligent Control System The Ministry of Education Taiyuan University of Technology Taiyuan030024 China College of Materials Science and Engineering Taiyuan University of Technology Taiyuan030024 China Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education School of Chemistry and Materials Science Shanxi Normal University Taiyuan030031 China State Key Laboratory of Dynamic Measurement Technology North University of China Shanxi Taiyuan030051 China School of Semiconductor and Physics North University of China Shanxi Taiyuan030051 China State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences Shanghai200050 China Shanxi Research Institute of 6D Artificial Intelligence Biomedical Science Taiyuan030024 China

Two-dimensional van der Waals magnetic materials have shown fascinating natural ferromagnetic properties at the atomic level, which has great potential in fields of low power spintronics, quantum computing and optical communication. Herein, the ferromagnetism and magnetic anisotropy of bulk Fe3GeTe2 (FGT) were investigated, and the testing results indicate a pronounced vertical magnetic anisotropy below the Curie temperature (Tc=165 K) of FGT. In addition, the anomalous Hall effect of FGT nanoflakes was studied at various temperatures and thicknesses by standard Hall bar device in detail. The results show the anomalous Hall resistance (0.764 Ω at 20 K decreased to 0.332 Ω at 140 K) and the obvious rectangular magnetic hysteresis rings below Tc (165 K). Furthermore, we calculated the carrier concentration (2.5×1022 cm-3 at 20K) and mobility (13.3 cm2/(v·s) at 20K) under large magnetic field (-6 T~6 T). Particularly, we demonstrated that the strong tailoring ability of the anomalous Hall effect for FGT-based magnetoelectric transport devices comes form the regulation of magnetic moment by sample thickness and magnetic field angle. The above experimental results verify that FGT is expected to be a prime candidate material for ultrathin 2D spintronic devices to the next generation. © 2024, The Authors. All rights reserved.

关键词： Germanium alloys

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Probing multi-mobility edges in quasiperiodic mosaic lattices

arXiv

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arXiv 2023年

作者： Gao, Jun Khaymovich, Ivan M. Wang, Xiao-Wei Xu, Ze-Sheng Iovan, Adrian Krishna, Govind Jieensi, Jiayidaer Cataldo, Andrea Balatsky, Alexander V. Zwiller, Val Elshaari, Ali W. Department of Applied Physics KTH Royal Institute of Technology Albanova University Centre Stockholm106 91 Sweden Nordita Stockholm University KTH Royal Institute of Technology StockholmSE-106 91 Sweden Institute for Physics of Microstructures Russian Academy of Sciences Nizhny Novgorod603950 Russia School of Physics and Astronomy State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University Shanghai200240 China Department of Physics University of Connecticut StorrsCT06269 United States

The mobility edge (ME) is a crucial concept in understanding localization physics, marking the critical transition between extended and localized states in the energy spectrum. Anderson localization scaling theory predicts the absence of ME in lower dimensional systems. Hence, the search for exact MEs, particularly for single particles in lower dimensions, has recently garnered significant interest in both theoretical and experimental studies, resulting in notable progress. However, several open questions remain, including the possibility of a single system exhibiting multiple MEs and the continual existence of extended states, even within the strong disorder domain. Here, we provide experimental evidence to address these questions by utilizing a quasiperiodic mosaic lattice with meticulously designed nanophotonic circuits. Our observations demonstrate the coexistence of both extended and localized states in lattices with broken duality symmetry and varying modulation periods. By single site injection and scanning the disorder level, we could approximately probe the ME of the modulated lattice. These results corroborate recent theoretical predictions, introduce a new avenue for investigating ME physics, and offer inspiration for further exploration of ME physics in the quantum regime using hybrid integrated photonic devices. © 2023, CC BY.

关键词： Nanophotonics

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Demonstration of A Time-domain Wavelength Interleaved Network Prototype without optical Buffers and Fast Switches in the Core Nodes

Demonstration of A Time-domain Wavelength Interleaved Networ...

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optical Fiber communication - OFC 2007 Collocated National Fiber Optic Engineers Conference (OFC 2007), vol.5

作者： Yikai Su Indra Widjaja Hao He Xinyu Xu Yue Tian Junming Gao Tong Ye State Key Lab of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiao Tong University 800 DongChuan Rd Shanghai 200240 China Bell Labs Lucent Technologies 600 Mountain Ave. Murray Hill NJ 07974 USA

We demonstrate a packet-switched network prototype without the needs for optical buffers and fast switches in the core. This network architecture is based on time-domain wavelength interleaving of data packets.

ISBN: (纸本)1557528306

关键词： Array waveguide devices Distributed feedback lasers optical buffers Packet switched networks Tunable lasers Waveguide gratings Fiber optics and optical communications (060.0060) Fiber optics communications (060.2330) networks (060.4250)

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optical VPN Connecting ONUs in Different PONs

Optical VPN Connecting ONUs in Different PONs

引用

optical Fiber communication - OFC 2007 Collocated National Fiber Optic Engineers Conference (OFC 2007), vol.2

作者： Yue Tian Xiangqing Tian Lufeng Leng Tong Ye Yikai Su State Key Lab of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiao Tong University 800 Dongchuan Rd Shanghai 200240 China New York City College of Technology City University of New York Brooklyn NY 11201 USA

We demonstrate optical-layer virtual private networking in a new super-PON architecture using a dynamic wavelength reflector. The optical VPN enables communications among different PONs.

ISBN: (纸本)1557528306

We demonstrate optical-layer virtual private networking in a new super-PON architecture using a dynamic wavelength reflector. The optical VPN enables communications among different PONs.

关键词： Arrayed waveguide gratings Bit error rate Fiber Bragg gratings optical amplification optical networks Passive optical networks Fiber optics and optical communications (060.0060) Fiber optics communications (060.2330) networks (060.4250)

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Multiple residual dense networks for reconfigurable intelligent surfaces cascaded channel estimation

arXiv

引用

arXiv 2021年

作者： Jin, Yu Zhang, Jiayi Huang, Chongwen Yang, Liang Xiao, Huahua Ai, Bo Wang, Zhiqin The School of Electronic and Information Engineering Beijing Jiaotong University Beijing100044 China The Frontiers Science Center for Smart High-speed Railway System Beijing Jiaotong University Beijing100044 China Zhejiang Provincial Key Lab of Information Processing Communication and Networking Zhejiang University Hangzhou310007 China College of Computer Science and Electronic Engineering Hunan University Changsha410082 China ZTE Corporation State Key Laboratory of Mobile Network Mobile Multimedia Technology Shenzhen518057 China State Key Laboratory of Rail Traffic Control and Safety Beijing Jiaotong University Beijing100044 China Henan Joint International Research Laboratory of Intelligent Networking and Data Analysis Zhengzhou University Zhengzhou450001 China Research Center of Networks and Communications Peng Cheng Laboratory Shenzhen518055 China China Academy of Information and Communications Technology Beijing100191 China

Reconfigurable intelligent surface (RIS) constitutes an essential and promising paradigm that relies programmable wireless environment and provides capability for space-intensive communications, due to the use of low-cost massive reflecting elements over the entire surfaces of man-made structures. However, accurate channel estimation is a fundamental technical prerequisite to achieve the huge performance gains from RIS. By leveraging the low rank structure of RIS channels, three practical residual neural networks, named convolutional blind denoising network, convolutional denoising generative adversarial networks and multiple residual dense network, are proposed to obtain accurate channel state information, which can reflect the impact of different methods on the estimation performance. Simulation results reveal the evolution direction of these three methods and reveal their superior performance compared with existing benchmark schemes. Copyright © 2021, The Authors. All rights reserved.

关键词： Channel estimation

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