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6th Conference on Frontiers in Optical Imaging and technology: Novel Technologies in Optical systems

作者： Zhu, Haixia Ni, Bo Feng, Zhenjie Qian, Yitong Zhou, Xiaoyan Ni, Haibin Yang, Lingsheng Chang, Jianhua Jiangsu Key Laboratory of Meteorological Observation and Information Processing School of Electronic and Information Engineering Nanjing University of Information Science and Technology Nanjing210044 China

ISBN: (数字)9781510679672

ISBN: (纸本)9781510679665

In this paper, an absorber based on split square graphene is designed, which produces double absorption peaks at different polarization incidence. The absorption rates of x-polarized waves at 7.86 THz and 12.63THz are 97.9% and 91.2% respectively. The absorption rates of y-polarized waves at 6.30 THz and 10.52 THz are 94.1% and 93.2%. In this paper, an absorber based on split square graphene is designed, which produces double absorption peaks at different polarization incidence. The absorption rates of x-polarized waves at 7.86 THz and 12.63THz are 97.9% and 91.2% respectively. The absorption rates of y-polarized waves at 6.30 THz and 10.52 THz are 94.1% and 93.2%. The effect of Fermi level on the dual polarization absorptivity of graphene is discussed. Therefore, this work may have great reference value for terahertz sensing, selective spectral detection and other fields. The effect of Fermi level on the dual polarization absorptivity of graphene is discussed. Therefore, this work may have great reference value for terahertz sensing, selective spectral detection and other fields. © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.

关键词： Polarization

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Angle-insensitive dual bound states in the continuum on germanium metasurface

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Chip 2025年第1期4卷 44-51页

作者： Yiqing Liu Jinwen Lv Ye Fan Meixue Zong Shubin Zhang Zhengji Xu School of Microelectronics Science and Technology Sun Yat-sen UniversityZhuhai 519082China Guangdong Provincial Key Laboratory of Optoelectronic Information Processing Chips and Systems Sun Yat-sen University Zhuhai 519082China

Metasurface-enabled bound states in the continuum(BICs)provide a novel solution for achieving exceptionally high quality factors(Q factors),which could overcome the limitations of traditional mid-infrared filters,sensors,lasers,and nonlinear ***,most BIC metasurfaces are restricted by their sensitivity to specific incident angles,limiting their practical ***,we introduced a germanium-based metasurface that supports two BIC modes for different polarizations,exhibiting robust angle *** leveraging geometric asymmetry,we effectively controlled BIC leakage and *** device maintained infinite Q factors under oblique incidence with preserved symmetry,and exhibited stable quasi-BIC resonance wavelengths and linewidths even with broken symmetry,regardless of TE or TM *** angular robustness has been validated both theoretically and experimentally,demonstrating its potential for broadening the applicability of high-performance mid-infrared optical devices.

关键词： Metasurface BIC Germanium Mid-infrared Angle-insen sitive

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Preface to the Special Issue:Hydrogen Embrittlement and Storage

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Acta Metallurgica Sinica(English Letters) 2023年第7期36卷 1057-1058页

作者： Binhan sun Hao Chen Key Laboratory of Pressure Systems and Safety Ministry of EducationSchool of Mechanical and Power EngineeringEast China University of Science and TechnologyShanghai200237China Key Laboratory for Advanced Materials of Ministry of Education School of Materials Science and EngineeringTsinghua UniversityBeijing100084China

There is no doubt that hydrogen(H)is becoming one of the most promising sustainable energy carriers which can release at least partially the current strong reliance on fossil fuel-based energy and the resulting enviro... 详细信息

关键词： doubt Storage becoming

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Microstructure and Mechanical Properties of TC4 Titanium Alloy Joint Fabricated By Vortex Flow-Based Friction Stir Welding

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Chinese Journal of Mechanical engineering 2024年第6期37卷 183-198页

作者： Xiaochao Liu Pengyu Zhang Wentao Li Tao Ye Chuanchao Xia Tairui Zhang Junmiao Shi Jilin Xie Zhonghua Ni School of Mechanical Engineering Southeast UniversityNanjing 211189China Advanced Ocean Institute of Southeast University Nantong 226010China Key Laboratory of Pressure Systems and Safety Ministry of EducationEast China University of Science and TechnologyShanghai 200237China Jiangxi Key Laboratory of Forming and Joining Technology for Aerospace Components Nanchang Hangkong UniversityNanchang 330063China

Tool wear is a critical challenge in titanium alloy friction stir welding(FSW).Vortex flow-based FSW(VFSW)is a potential solution for this issue because the VFSW process uses a similar material to the base metal as the *** this study,TC4 titanium alloy was welded by VFSW for the first *** optimization of the vortex flow formation is first done,and then the weld formation and the joints'microstructure and mechanical performance are investigated at different traversing *** results prove that the plunging velocity is the dominant factor in the vortex depth.A lower plunging speed is beneficial for the formation of a deeper *** penetration is achieved at traversing speeds of 50–120 mm/min at 300 r/*** welding speed above 130 mm/min,insufficient penetration defects *** the heat affected zone,grain coarsening andβ-phase volume fraction increase arise,whereas,in the weld nugget,anα+βlamellar structure *** the optimized parameters,the joint tensile strength is nearly 98%of the base material,but the elongation decreases *** oxides drawn into the weld by the vortex at the junction between the vortex and the base material are the main reason for the small *** study proves that the VFSW process is feasible for titanium alloys.

关键词： FSW Microstructure Vortex flow Weld formation Mechanical performance Titanium alloy

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Design and validation of a combined system for in situ measurement of photosensitizer fluorescence and tissue diffuse reflectance 14

Design and validation of a combined system for in situ measu...

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Optics in Health Care and Biomedical Optics XIV 2024

作者： Zhan, Huiqi Guo, Xingran Ke, Cheng Peng, Weijin Cui, Shengdong Huang, Zheng MOE Key Laboratory of Medical Optoelectronics Science and Technology Key Laboratory of Photonics Technology of Fujian Province School of Optoelectronics and Information Engineering Fujian Normal University Fuzhou China

ISBN: (纸本)9781510682122

Background: Quantitative measurement of photosensitizer during photodynamic therapy (PDT) is critical. One of the practical approaches is to measure photosensitizer’s fluorescence, however, the influence of tissue optic properties needs to be considered in in situ measurement. Objective: To design and validate a combined system for dual detection of fluorescence and tissue diffuse reflectance. Materials and Method:For fluorescence detection, a 405 nm laser was used for excitation, a power meter for monitoring laser power and a fiber optic spectrometer for recording fluorescence. For diffuse reflectance measurement, a halogen lamp was used as light source and a fiber optic spectrometer for recording diffuse reflectance. Hemoporfin (HMME) was used as a model photosensitizer. Mice were used to evaluate the dual detection function of fluorescence and tissue diffuse reflectance after i.v. injection of HMME. Results: Solutions of different concentrations of HMME were used to test the intensity responses of the fluorescence detection system. A linear correlation was observed at HMME concentration lower than 10 μg/ml. Dual-band correction using corresponding diffuse reflectance data was used for the correction of original fluorescence spectrum. Diffuse reflectance corrected fluorescence data might truly reflect HMME concentration in the skin tissue. Conclusion: The preliminary evaluation suggests that the combined system can be used for quantitative measurement of photosensitizer fluorescence. © 2024 SPIE.

关键词： Fluorescence Diffuse reflectance spectroscopy Tissues Photodynamic therapy Skin

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Computing Resource Allocation for Blockchain-Based Mobile Edge Computing

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Computer Modeling in engineering & sciences 2024年第7期140卷 863-885页

作者： Wanbo Zhang Yuqi Fan Jun Zhang Xu Ding Jung Yoon Kim School of Computer Science and Information Engineering Intelligent Interconnected Systems Laboratory of Anhui ProvinceHefei University of TechnologyHefei230601China Anhui Province Key Lab of Aerospace Structural Parts Forming Technology and Equipment Hefei University of TechnologyHefei230009China College of Future Industry Gachon UniversitySeongnam13120South Korea

Users and edge servers are not fullymutually trusted inmobile edge computing(MEC),and hence blockchain can be introduced to provide *** blockchain-basedMEC,each edge server functions as a node in bothMEC and blockchain,processing users’tasks and then uploading the task related information to the *** is,each edge server runs both users’offloaded tasks and blockchain tasks *** that there is a trade-off between the resource allocation for MEC and blockchain ***,the allocation of the resources of edge servers to the blockchain and theMEC is crucial for the processing delay of blockchain-based *** of the existing research tackles the problem of resource allocation in either blockchain or MEC,which leads to unfavorable performance of the blockchain-based MEC *** this paper,we study how to allocate the computing resources of edge servers to the MEC and blockchain tasks with the aimtominimize the total systemprocessing *** the problem,we propose a computing resource Allocation algorithmfor Blockchain-based MEC(ABM)which utilizes the Slater’s condition,Karush-Kuhn-Tucker(KKT)conditions,partial derivatives of the Lagrangian function and subgradient projection method to obtain the *** results show that ABM converges and effectively reduces the processing delay of blockchain-based MEC.

关键词： Mobile edge computing blockchain resource allocation

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Screening and pilot-scale evaluation of a highly efficient pesticide-degrading Pseudomonas *** BL5

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Chinese Journal of Chemical engineering 2024年第10期74卷 287-294页

作者： Rui Chen Xinyu Zuo He Bai Ruolin Qin Zhiguo Chen Yiyun Liu Wenqing Cao Jingpeng Song Xiaoqiang Jia Department of Biochemical Engineering School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China Tianjin Huakan Environmental Protection Technology Co. Ltd.Tianjin 300170China Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering(Ministry of Education) School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300350China

The widespread use of pesticides has caused serious harm to ecosystems,necessitating effective and environmentally friendly treatment *** stands out as a promising approach for pollutant treatment,wherein the metabolic activities of microorganisms can transform toxic pesticides into compounds with lower or no *** this study,we obtained eight pesticide-degrading strains from pesticide-contaminated sites through continuous enrichment and *** highly efficient pesticide-degrading strains(degradation ratios exceeding 80%)were *** them,Pseudomonas ***5 exhibited the strongest growth(exceeding 10^(9) CFU·ml^(-1))and outstanding degradation of benzene derivatives and chlorinated hydrocarbons at both laboratory and pilot scales,with degradation ratios exceeding 98%and 99.6%,*** research provides new tools and insights for the bioremediation of pesticide-related pollutants.

关键词： Pesticides Pilot-scale Degradation Remediation Pseudomonas sp. Benzene

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Effect of mouse skin autofluorescence on the measurement of photosensitizer fluorescence 14

Effect of mouse skin autofluorescence on the measurement of ...

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Optics in Health Care and Biomedical Optics XIV 2024

作者： Guo, Xingran Peng, Weijin Wei, Zhe Cui, Shengdong Zhan, Huiqi Ke, Cheng Huang, Zheng MOE Key Laboratory of Medical Optoelectronics Science and Technology Key Laboratory of Photonics Technology of Fujian Province School of Optoelectronics and Information Engineering Fujian Normal University Fuzhou China

ISBN: (纸本)9781510682122

Background: Mouse model is a unique tool for preclinical evaluation of photosensitizing drugs for their potential applications in photodynamic therapy (PDT). The fluorescent property of photosensitizer provides a useful means for in situ measurement of photosensitizer distribution. However, the autofluorescence of mouse tissues might potentially affect in situ photosensitizer fluorescence measurement. Objectives: The aim of this study was to evaluate the autofluorescence in lab mice and its influence on the in situ measurement of photosensitizer fluorescence. Materials and Materials and methods: ICR mice, commonly used lab animal model, were used. Mice were fed with regular diet and clean water. Domestically produced photosensitizing drug Hemoporfin® was used as a model sensitizer. Costume-built fluorescence imaging and spectroscope systems were used for fluorescence examination under the excitation wavelength of 400 ±5 nm, generated from a laser or LED panel. In situ fluorescence was examined before and after i.v. injection of Hemoporfin®. Results: Epifluorescence imaging examination showed yellowish and reddish autofluorescence fluorescence in the mouth, nose, paws and tail areas. The absorption and emission spectra of mouse tissue overlaid to some degrees with that of Hemoporfin®. In situ fluorescence examination of ICR mice showed significant influence of autofluorescence on the spectral and intensity measurement of Hemoporfin® fluorescence. Such influence might be eliminated by post-measurement spectral correction algorithms. Conclusions: The autofluorescence in mouse tissues poses a significant influence on the in situ measurement of fluorescence emission of Hemoporfin®. Careful post-measurement spectral correction is needed for accurately measuring photosensitizer fluorescence. © 2024 SPIE.

关键词： Tissue

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C1M2:a universal algorithm for 3D instance segmentation,annotation,and quantification of irregular cells

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science China(Life sciences) 2023年第10期66卷 2415-2428页

作者： Hao Zheng Songlin Huang Jing Zhang Ren Zhang Jialu Wang Jing Yuan Anan Li Xin Yang Zhihong Zhang Britton Chance Center and MOE Key Laboratory for Biomedical Photonics Wuhan National Laboratory for Optoelectronics-Huazhong University of Science and TechnologyWuhan 430074China Key Laboratory of Biomedical Engineering of Hainan Province School of Biomedical EngineeringHainan UniversityHaikou 570228China School of Electronic Information and Communications Huazhong University of Science and TechnologyWuhan 430074China

Cell instance segmentation is a fundamental task for many biological applications,especially for packed cells in three-dimensional(3D)microscope images that can fully display cellular *** processing algorithms based on neural networks and feature engineering have enabled great progress in two-dimensional(2D)instance ***,current methods cannot achieve high segmentation accuracy for irregular cells in 3D *** this study,we introduce a universal,morphology-based 3D instance segmentation algorithm called Crop Once Merge Twice(C1M2),which can segment cells from a wide range of image types and does not require nucleus images.C1M2 can be extended to quantify the fluorescence intensity of fluorescent proteins and antibodies and automatically annotate their expression levels in individual *** results suggest that C1M2 can serve as a tissue cytometry for 3D histopathological assays by quantifying fluorescence intensity with spatial localization and morphological information.

关键词： 3D instance segmentation irregular cells fluorescence images neural networks fluorescence intensity tissue cytometry

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Deep Learning for Covert Communication

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China Communications 2024年第9期21卷 40-59页

作者： Shen Weiguo Chen Jiepeng Zheng Shilian Zhang Luxin Pei Zhangbin Lu Weidang Yang Xiaoniu Innovation Studio of Academician Yang National Key Laboratory of Electromagnetic Space SecurityJiaxing 314033China College of Information Engineering Zhejiang University of TechnologyHangzhou 310023China School of Information Science and Technology Fudan UniversityShanghai 200438China

In recent years,deep learning has been gradually used in communication physical layer receivers and has achieved excellent *** this paper,we employ deep learning to establish covert communication systems,enabling the transmission of signals through high-power signals present in the prevailing environment while maintaining covertness,and propose a convolutional neural network(CNN)based model for covert communication receivers,namely Deep *** model leverages CNN to execute the signal separation and recovery tasks commonly performed by traditional *** enables the direct recovery of covert information from the received *** simulation results show that the proposed Deep CCR exhibits significant advantages in bit error rate(BER)compared to traditional receivers in the face of noise and multipath *** verify the covert performance of the covert method proposed in this paper using the maximum-minimum eigenvalue ratio-based method and the frequency domain entropy-based *** results indicate that this method has excellent covert *** also evaluate the mutual influence between covert signals and opportunity signals,indicating that using opportunity signals as cover can cause certain performance losses to covert *** the interference-tosignal power ratio(ISR)is large,the impact of covert signals on opportunity signals is minimal.

关键词： convolutional neural network covert communication deep learning

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