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SSRN 2023年

作者： Huang, RongHui Ni, XiaoLong Yu, Xin ChunYi, Chen The School of Opto-Electronic Engineering Changchun University of Science and Technology Changchun130022 China Fundamental Science on Space-Ground Laser Communication Technology Laboratory Changchun University of Science and Technology Changchun130022 China Key Laboratory of Photoelectric Measurement & Control and Optical Information Transfer Technology Changchun University of Science and Technology 7089 Weixing Road Changchun130022 China

Simulated turbulence phase screens are widely used in various optical experiment scenarios, but there is no satisfactory solution in terms of speed and accuracy so far. For this purpose, we use the numerical simulation method of turbulence phase screen based on the sparse spectral model to generate a large amount of data and make the Liquid Crystal Atmospheric Turbulence Simulator (LC-ATS) have the ability to simulate the atmosphere in real-time by using the Computational Unified Device Architecture (CUDA) on GPU for parallel computation. Experiments were conducted on a Liquid Crystal Spatial Light Modulator (LC-SLM) using a wavefront phase screen that generates an atmospheric turbulence model. The experimental results yielded up to about 1.36ms per frame at the resolution of 512x512, and up to about 423Hz at the liquid crystal on silicon (LC-OS). To our knowledge, this is the highest speed used to generate turbulent phases in real-time. © 2023, The Authors. All rights reserved.

关键词： Atmospheric turbulence

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A Dual-Band Metagrating for Diffraction control: Design and Experimental Demonstration

A Dual-Band Metagrating for Diffraction Control: Design and ...

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IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications (IMWS-AMP)

作者： Shan Xuan Kai Feng Jianjia Yi School of Information and Communications Engineering Xi’an Jiaotong University Xi’an China Science and Technology on Electro-Optical Information Security Control Laboratory Tianjin China State Key Laboratory of Millimeter Waves Southeast University Nanjing China

The metagratings have attracted extensive attention over the recent years as a special class of periodic metamaterials for their near-perfect electromagnetic wave manipulation through a simple and sparse array structure. In this paper, we propose a dual-band metagrating design for wide-angle reflection. The proposed structure with dual-band response can perform as one period at low frequency band and equal as two periods at high frequency band, thus realizing beam manipulation at two frequency bands by periodic conversion. The design procedure is fast, accurate and easy to implement combined with analytical design and local periodic approximation. To verify the performance of the proposed design, a dual-band printed circuit board metagrating that performs perfect anomalous reflection at 6.16 GHz and 20 GHz is designed and demonstrated.

关键词： Diffraction Printed circuits Dual band Switches Frequency conversion Microwave frequencies Reflection

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Study of Sub-Pixel Gray Degree Reconstruction Method for Simulation of Faint Star Element Target Position

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SSRN 2023年

作者： Wu, Linghao Wang, Jiaan Jia, Wentao Zhang, Jian Sun, Jingrui Department of Measurement and Control Technology and Instrumentation Changzhou Institute of Technology Changzhou213032 China Key Laboratory of Space Precision Measurement Technology Chinese Academy of Sciences Xian710119 China State Key Laboratory of Optoelectronic Measurement Control and Optical Information Transmission Changchun University of Science and Technology Changchun130022 China

The simulation accuracy of the faint star element target (FSET) position is a key factor that affects the accuracy of the precision test of the star sensor. In order to solve the problem that the position accuracy of FSET is restricted by the size of its component elements, the mathematical representation of FSET position correction and the grayscale distribution of the component elements is derived, and the Gaussian radius and grayscale energy coefficient model of FSET is established. According to the measured distribution results of the position error of the full-field FSET, the gray distribution of the basic element is reconstructed by reconstructing each correction set to simulate FSET, and the correction accuracy of the sub-pixel level FSET position is realized. The experimental results show that, compared with the existing correction methods, the position accuracy of FSET is improved by 1.64 times after subpixel gray reconstruction. © 2023, The Authors. All rights reserved.

关键词： Pixels

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optical meta-waveguides for integrated photonics and beyond

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Light(science & Applications) 2021年第12期10卷 2263-2306页

作者： Yuan Meng Yizhen Chen Longhui Lu Yimin Ding Andrea Cusano Jonathan A.Fan Qiaomu Hu Kaiyuan Wang Zhenwei Xie Zhoutian Liu Yuanmu Yang Qiang Liu Mali Gong Qirong Xiao Shulin Sun Minming Zhang Xiaocong Yuan Xingjie Ni State Key Laboratory of Precision Measurement Technology and Instruments Department of Precision InstrumentTsinghua University100084 BeijingChina Shanghai Engineering Research Center of Ultra-Precision Optical Manufacturing and School of Information Science and TechnologyFudan UniversityShanghai 200433China School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhan 430074China Department of Electrical Engineering Pennsylvania State UniversityUniversity ParkPA 16802USA Optoelearonic Division Department of EngineeringUniversity of Sannio1-82100 BeneventoItaly Department of Electrical Engineering Stanford UniversityStanfordCA 94305USA Nanophotonics Research Centre Shenzhen Key Laboratory of Micro-Scale Optical Information TechnologyShenzhen UniversityShenzhen 518060China Key Laboratory of Photonic Control Technology Ministry of EducationTsinghua University100084 BeijingChina Yiwu Research Institute of Fudan University Chengbei RoadYiwu City 322000 ZhejiangChina Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074 HubeiChina

The growing maturity of nanofabrication has ushered massive sophisticated optical structures available on a photonic *** integration of subwavelength-structured metasurfaces and metamaterials on the canonical building block of optical waveguides is gradually reshaping the landscape of photonic integrated circuits,giving rise to numerous metawaveguides with unprecedented strength in controlling guided electromagnetic ***,we review recent advances in meta-structured waveguides that synergize various functional subwavelength photonic architectures with diverse waveguide platforms,such as dielectric or plasmonic waveguides and optical *** results and representative applications are comprehensively *** physical models with explicit design tutorials,either physical intuition-based design methods or computer algorithms-based inverse designs,are cataloged as *** highlight how meta-optics can infuse new degrees of freedom to waveguide-based devices and systems,by enhancing light-matter interaction strength to drastically boost device performance,or offering a versatile designer media for manipulating light in nanoscale to enable novel *** further discuss current challenges and outline emerging opportunities of this vibrant field for various applications in photonic integrated circuits,biomedical sensing,artificial intelligence and beyond.

关键词： waveguides waveguide beyond

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Playback Method for Dynamic Star Map Simulation by Fusing Cosmic Background Radiation Information

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SSRN 2024年

作者： Zhao, Bin Zhang, Yu Yang, Dongpeng Yang, Songzhou Zhang, Jian Sun, Gaofei Yao, Meng Ren, Taiyang Junjie, Yang Meng, XiangKai Zhang, Guoyu School of Optoelectronic Engineering Changchun University of Science and Technology Changchun130022 China State Key Laboratory of High Power Semiconductor Laser of Changchun University of Science and Technology Jilin Changchun130022 China Institute of Aerospace Ground Simulation Test and Testing Technology Changchun University of Science and Technology Changchun130022 China Optical Measurement and Control Instrumentation Jilin Province Engineering Research Center Changchun130022 China Key Laboratory of Opto-electronic Measurement and Optical Information Transmission Technology Ministry of Education Department of Instrumentation Science and Technology Changchun University of Science and Technology Changchun130022 China School of Life Science and Technology Changchun University of Science and Technology Changchun130022 China

In this study, a playback method for dynamic star map simulation fusing cosmic background radiation information was proposed to improve the playback speed of star maps. The image distortion effect before and after the fusion of star maps and cosmic background radiation was evaluated using peak signal-to-noise ratios. The performance of the proposed and the global catalog traversal generation algorithms without cosmic background radiation simulation capability, as well as the indicators, were experimentally compared. The results showed that the average refresh rates of the view cone filtering star map fast-generation algorithm and the fusion playback algorithm of the star map and cosmic background radiation were 74.2 and 73.7 Hz, respectively. Compared with the entire catalog traversal generation algorithm, the instantaneous stability of the single-frame star map was improved by 3.045 and 3.305 times, respectively, and the consumed time consistency was improved by 4.646 and 5.068 times, respectively. © 2024, The Authors. All rights reserved.

关键词： Image fusion

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Prediction of Hybrid Asynchronous Frequency Hopping Pattern based on Deep Learning in Wideband Spectrum

Prediction of Hybrid Asynchronous Frequency Hopping Pattern ...

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Chinese Automation Congress (CAC)

作者： Ya Wang Jiaqi Wang Shuai Yuan Naijin Liu Yuanming Lu Qian Xuesen Laboratory of Space Technology China Academy of Space Technology Beijing China Science and Technology on Complex System Control and Intelligent Agent Cooperation Laboratory Beijing Electro-Mechanical Engineering Institute Beijing China Unit 63893 of PLA Luoyang China

In non-cooperative scenarios, wideband frequency hopping (FH) communication reconnaissance including FH signal detection, parameter estimation, and network sorting under single-channel reception is challenging. The FH pattern contains the most information about FH signals. So it is the core of FH parameter estimation. Based on the task analysis, this paper proposes a blind prediction framework combining deep learning (DL) and clustering methods to improve the accuracy and efficiency of FH pattern estimation for mixed signals in the wideband spectrum. The unique advantage of this framework is that it requires no prior signal information and anchors but exploits the inherent time-frequency (TF) properties of asynchronous FH signals. It has a strong generalization ability and can adapt to signals of any shape. Moreover, a new comprehensive evaluation metric, normalized root mean square error including missed detection (NRMSE-MD), suitable for sequence data prediction is proposed to evaluate the level of missed detection and false detection in signal monitoring. Experimental results demonstrate the superiority of the proposed framework and the effectiveness of the proposed evaluation metric.

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Advances in Nanoplasmonic Biosensors: Optimizing Performance for Exosome Detection Applications

Biosensors

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Biosensors 2024年第6期14卷 307页

作者： Nurrohman, Devi Taufiq Chiu, Nan-Fu Hsiao, Yu-Sheng Lai, Yun-Ju Nanda, Himansu Sekhar Laboratory of Nano-Photonics and Biosensors Institute of Electro-Optical Engineering National Taiwan Normal University Taipei11677 Taiwan Department of Life Science National Taiwan Normal University Taipei11677 Taiwan Department of Materials Science and Engineering National Taiwan University of Science and Technology No. 43 Sec. 4 Keelung Road Da-an District Taipei10607 Taiwan Biomedical Engineering and Technology Laboratory Mechanical Engineering Discipline PDPM Indian Institute of Information Technology Design & Manufacturing Jabalpur482005 India

The development of sensitive and specific exosome detection tools is essential because they are believed to provide specific information that is important for early detection, screening, diagnosis, and monitoring of cancer. Among the many detection tools, surface-plasmon resonance (SPR) biosensors are analytical devices that offer advantages in sensitivity and detection speed, thereby making the sample-analysis process faster and more accurate. In addition, the penetration depth of the SPR biosensor, which is © 2024 by the authors.

关键词： Surface plasmon resonance

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Modeling Method of Aircraft Simulation Based on Formal Description of Petri Net 18th

Modeling Method of Aircraft Simulation Based on Formal Des...

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18th Chinese Intelligent Systems Conference, CISC 2022

作者： Zhan, Tianming Huang, Yu Geng, Huapin Tong, Jiahui TAIJI Computer Co. Ltd Beijing100102 China Peking University Beijing100871 China Science and Technology on Complex System Control and Intelligent Agent Cooperation Laboratory Beijing100190 China Beijing Electro-Mechanical Engineering Institute Beijing102299 China

ISBN: (纸本)9789811962028

The simulation of aircraft guidance and control system has characteristics such as multiple model classification, large parameter influence,complex information interaction and so on. The traditional code-level model development method has many limitations, such as time consuming, low reusability, low modeling efficiency, and model quality can not be guaranteed. Based on the concurrency, graphic representation, mathematics and simulation characteristics of Petri net, this paper studies the aircraft simulation modeling method of formal description based on Petri net, constructs a general modeling development and integration software tool that can carry out component, parametric and graphical modeling, solves the problems of multi granularity model modeling and automatic generation of real-time simulation model code, and realizes the visual graphic modeling and comprehensive integration of different granularity models such as components, modules and meta models. The research method has been successfully applied in the simulation modeling of an aircraft. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Petri nets

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Nitrogen doping induced by intrinsic defects of recycled polyethylene terephthalate-derived carbon nanotubes

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SusMat 2023年第3期3卷 431-440页

作者： Chuanping Li Lijuan Tong Shuling Wang Qian Liu Yaxin Wang Xuan Li Manxi Wang Manxian Li Xiaochuan Chen Junxiong Wu Qinghua Chen Yiu-Wing Mai Weiwei Fan Yuming Chen Xiaoyan Li Engineering Research Center of Polymer Green Recycling of Ministry of Education Fujian Key Laboratory of Pollution Control&Resource ReuseCollege of Environmental and Resource Sciences and College of Carbon Neutral Modern IndustryFujian Normal UniversityFuzhouFujianChina Hebei International Joint Research Center for Computational Optical Imaging and Intelligent Sensing School of Mathematics and Physics Science and EngineeringHebei University of EngineeringHandanHebeiChina Centre for Advanced Materials Technology(CAMT) School of AerospaceMechanical and Mechatronics Engineering J07The University of SydneySydneyNew South WalesAustralia Department of Materials Science and Engineering and Department of Nuclear Science and Engineering Massachusetts Institute of TechnologyCambridgeMassachusettsUSA

The indiscriminate utilization of nondegradable polyethylene terephthalate(PET)-based products has triggered serious environmental pollution that has to be resolved vigorously.A simple synthesis of N-doped carbon nanotubes from recycled PET(NCNTs_(r-PET))was developed by a nitric acid-assisted hydrothermal *** results and theoretical calculations show that the intrinsic defects in CNTs_(r-PET)would induce N-doping by NH_(3)generated from nitric acid during the hydrothermal process,thus producing the NCNTs_(r-PET).The life cycle assessment proves that the developed method for N-doped CNTs using r-PET as the carbon source is more environmentally friendly than the conventional chemical vapor deposition using acetylene as the carbon *** a typical application,the NCNTs_(r-PET)delivered an impressive sodium storage capacity with an ultralong *** work not only provides a new route to upcycling waste plastics into valuable carbonaceous materials in an ecofriendly manner,but also reveals a basic understanding of the N-doping mechanism in carbonaceous materials.

关键词： carbon nanotubes defect-induced N-doping life cycle assessment rechargeable batteries recycled PET

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Transient electromagnetic Simulation for Periodic Structures with a Modified Parallel DGTD Method

Transient Electromagnetic Simulation for Periodic Structures...

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IEEE International Wireless Symposium (IWS)

作者： Chunyu Li Zhou Dai Tiancheng Zhang Huaguang Bao Yinghui Zhou Zheng Sun Dazhi Ding Nanjing University of Science and Technology Nanjing China Nanjing Electronic Devices Institute Nanjing China National Key Laboratory on Electromagnetic Environmental Effects and Electro-optical Engineering Army Engineering University Nanjing China

Due to natural block diagonal mass matrices, discontinuous Galerkin time domain (DGTD) method provides convenient condition for parallel computation. However, when the number of processes increases, the traffic between processes gradually increases, leading to the sharp decline of the parallelism efficiency. To solve these problems, non-blocking communication technology with the math kernel library (MKL) scheme is proposed to improve the efficiency of message passing interface (MPI) parallel computing. Thus, a typical periodic electromagnetic structure - frequency selective surface (FSS) is simulated, which achieves an acceleration ratio of more than 1.8 times, and further improves the performance of the DGTD algorithm.

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