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Seeing at a distance with multicore fibers

Opto-Electronic Advances 2024年第7期7卷 39-49页

作者： Haogong Feng Xi Chen Runze Zhu yifeng xiong Ye Chen Yanqing Lu Fei Xu National Laboratory of Solid State Microstructures College of Engineering and Applied Sciencesand Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China College of Physics MIIT Key Laboratory of Aerospace Information Materials and PhysicsState Key Laboratory of Mechanics and Control for Aerospace StructuresNanjing University of Aeronautics and AstronauticsNanjing 211106China

Images and videos provide a wealth of information for people in production and *** most digital information is transmitted via optical fiber,the image acquisition and transmission processes still rely heavily on electronic *** development of all-optical transmission networks and optical computing frameworks has pointed to the direction for the next generation of data transmission and information ***,we propose a high-speed,low-cost,multiplexed parallel and one-piece all-fiber architecture for image acquisition,encoding,and transmission,called the Multicore Fiber Acquisition and Transmission Image System(MFAT).Based on different spatial and modal channels of the multicore fiber,fiber-coupled self-encoding,and digital aperture decoding technology,scenes can be observed directly from up to 1 km *** expansion of capacity provides the possibility of parallel coded transmission of multimodal high-quality *** requires no additional signal transmitting and receiving *** all-fiber processing saves the time traditionally spent on signal conversion and image pre-processing(compression,encoding,and modulation).Additionally,it provides an effective solution for 2D information acquisition and transmission tasks in extreme environments such as high temperatures and electromagnetic interference.

关键词： long-distance fiber imaging image transmission parallel transmission all-optical encoding multicore fiber

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Defect suppression mechanism of ultrasonic vibration-assisted drilling carbon fiber/bismaleimide composite

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Chinese Journal of Aeronautics 2023年第8期36卷 366-380页

作者： Shengguo ZHANG Wenhu WANG yifeng xiong Bo HUANG Ruisong JIANG Key Laboratory of High Performance Manufacturing for Aero Engine Ministry of Industry and Information TechnologySchool of Mechanical EngineeringNorthwestern Polytechnical UniversityXi’an 710072China Engineering Research Center of Advanced Manufacturing Technology for Aero Engine Ministry of EducationSchool of Mechanical EngineeringNorthwestern Polytechnical UniversityXi’an 710072China School of Mechanical Engineering Sichuan UniversityChengdu 610207China

Ultrasonic vibration-assisted drilling(UVAD)has recently been successfully applied in the drilling of carbon fiber reinforced polymer/plastic(CFRP)due to its high *** defects have been observed in the CFRP drilling process which negatively affects the quality of the *** carbon fiber/bismaleimide(BMI)composites is an advanced kind of CFRPs with greater strength and heat resistance,having been rapidly applied in lightweight and high temperature resistant structures in the aerospace *** suppress the defect during the drilling of carbon fiber/BMI composites,it is necessary to comprehensively understand the defect formation and suppression mechanism at different *** this study,the defects formation in both conventional drilling(CD)and UVAD were observed and *** variation trend in the defect factor and thrust force with the spindle speed and feed rate were *** results revealed that the UVAD could significantly enhance the hole’s quality with no delamination and ***,the defect suppression mechanism and thrust force in UVAD were analyzed and verified,where the method of rod chip removal affected the exit defect *** summary,UVAD can be considered a promising and competitive technique for drilling carbon fiber/BMI composites.

关键词： CFRP Defect suppression Rod chip Thrust force UVAD

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Investigation on surface roughness,residual stress and fatigue property of milling in-situ TiB_2/7050Al metal matrix composites

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Chinese Journal of Aeronautics 2021年第4期34卷 451-464页

作者： yifeng xiong Wenhu WANG Yaoyao SHI Ruisong JIANG Chenwei SHAN Xiaofen LIU Kunyang LIN Key Laboratory of High Performance Manufacturing for Aero Engine Ministry of Industry and Information TechnologySchool of Mechanical EngineeringNorthwestern Polytechnical UniversityXi'an 710072China Engineering Research Center of Advanced Manufacturing Technology for Aero Engine Ministry of EducationSchool of Mechanical EngineeringNorthwestern Polytechnical UniversityXi'an 710072China School of Aeronautics and Astronautics Sichuan UniversityChengdu 610065China

For higher efficiency and precision manufacturing,more and more attentions are focused on the surface roughness and residual stress of machined parts to obtain a good fatigue *** present,the in-situ TiB_2/7050 Al metal matrix composites are widely researched due to its attractive properties such as low density,good wear resistance and improved *** is of great significance to investigate the machined surface roughness,residual stress and fatigue life for higher efficiency and precision manufacturing of this new kind *** this study,the surface roughness including two-dimensional and three-dimensional roughness,residual stress and fatigue life of milling in-situ TiB_2/7050 Al metal matrix composites were *** was found from comparative investigation that the three-dimensional surface roughness would be more appropriate to represent the machined surface profile of milling particle reinforced metal matrix *** cutting temperature played a great role on the residual ***,the effect of increasing cutting force could slow down the transformation from compressive stress to tensile stress under 270°*** exponential relationship between three-dimensional roughness and fatigue life was established and the main fracture mechanism was brittle fracture with observation of obvious shellfish veins,river pattern veins and wave shaped veins in fracture surface.

关键词： Fatigue life Metal matrix composite Residual stress Three-dimensional surface roughness TiB_2 particle Two-dimensional surface roughness

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Analytical model of cutting force in axial ultrasonic vibration-assisted milling in-situ TiB_(2)/7050Al PRMMCs

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Chinese Journal of Aeronautics 2021年第4期34卷 160-173页

作者： Xiaofen LIU Wenhu WANG Ruisong JIANG yifeng xiong Kunyang LIN Junchen LI Chenwei SHAN Key Laboratory of High Performance Manufacturing for Aero Engine Ministry of Industry and Information TechnologySchool of Mechanical EngineeringNorthwestern Polytechnical UniversityXi'an 710072China Engineering Research Center of Advanced Manufacturing Technology for Aero Engine Ministry of EducationSchool of Mechanical EngineeringNorthwestern Polytechnical UniversityXi'an 710072China School of Aeronautics and Astronautics Sichuan UniversityChengdu 610065China

Ultrasonic vibration-assisted milling has been widely applied in machining the difficultto-cut materials owing to the remarkable improvements in reducing the cutting ***,analytical models to reveal the mechanism and predict the cutting force of ultrasonic vibrationassisted milling metal matrix composites are still needed to be *** this paper,an analytical model of cutting force was established for ultrasonic vibration-assisted milling in-situ TiB_(2)/7050 Al metal matrix *** modeling,change of motion of the cutting tool,contact of toolchip-workpiece and acceleration of the chip caused by ultrasonic vibration was considered based on equivalent oblique cutting ***,material properties,tool geometry,cutting parameters and vibration parameters were taken into ***,the developed analytical force model was validated with and without ultrasonic vibration milling experiments on in-situ TiB_(2)/7050 Al metal matrix *** predicted cutting forces show to be consistent well with the measured cutting ***,the relative error of instantaneous maximum forces between the predicted and measured data is from 0.4%to 15.1%.The analytical model is significant for cutting force prediction not only in ultrasonic-vibration assisted milling but also in conventional milling in-situ TiB_(2)/7050 Al metal matrix composites,which was proved with general applicability.

关键词： Al-MMCs Analytical model Cutting force In-situ Milling TiB_(2)particles Ultrasonic vibration

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原发性皮肤边缘区B细胞淋巴瘤1例

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中国皮肤性病学杂志 2024年第7期38卷 794-798页

作者：瞿振日万川熊一峰曹先伟张志彬南昌大学第一附属医院皮肤科江西南昌330000 江西省临床医学科学研究院皮肤病研究所江西南昌330000 南昌大学第一附属医院病理科江西南昌330000

患者男,47岁,颊部单发红色结节3个月。皮肤科情况:左侧颊部可见一3 cm×2 cm大小半球形暗红色结节,境界清楚,质地较硬,无压痛,不可移动,表面光滑,可见粗细不一扩张的毛细血管。皮损组织病理示:表皮轻度角化,真皮层内见淋巴样细胞片状分... 详细信息

患者男,47岁,颊部单发红色结节3个月。皮肤科情况:左侧颊部可见一3 cm×2 cm大小半球形暗红色结节,境界清楚,质地较硬,无压痛,不可移动,表面光滑,可见粗细不一扩张的毛细血管。皮损组织病理示:表皮轻度角化,真皮层内见淋巴样细胞片状分布,包绕皮肤附属器,并向皮下脂肪组织内穿插性生长,细胞中等大小,核圆形或稍不规则、深染,间质血管丰富,内皮细胞肥大。淋巴组织增生性病变,考虑淋巴瘤。免疫组织化学染色示:CD20(+),CD79a(+),Bcl-2(95%+),Bcl-6(-),CD3(部分+),CD10(-),Ki67(25%+),IgG(散在+);CD21示滤泡结构中FDC网松散、破坏。诊断:原发性皮肤边缘区B细胞淋巴瘤。治疗:标准外科手术切除全部皮损组织,随访未见复发倾向。

关键词：皮肤边缘区B细胞淋巴瘤原发性

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Multifunctional integration on optical fiber tips: challenges and opportunities

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Advanced Photonics 2020年第6期2卷 23-46页

作者： yifeng xiong Fei Xu Nanjing University College of Engineering and Applied SciencesNanjingChina

.The flat endface of an optical fiber tip is an emerging light-coupled microscopic platform that combines fiber optics with planar micro-and *** different materials and structures are integrated onto the endfaces,optical fiber tip devices have miniature sizes,diverse integrated functions,and low insertion losses,making them suitable for all-optical *** recent decades,the increasing demand for multifunctional optical fibers has created opportunities to develop various structures on fiber ***,the unconventional shape of optical fibers presents challenges involving the adaptation of standard planar micro-and nanostructure preparation strategies for fiber *** this context,researchers are committed to exploring and optimizing fiber tip manufacturing techniques,thereby paving the way for future integrated all-fiber devices with multifunctional ***,we present a broad overview of current fabrication technologies,classified as“top-down,”“bottom-up,”and“material transfer”methods,for patterning optical fiber ***,we review typical structures integrated on fiber tips and their known and potential applications,categorized with respect to functional structure configurations,including“optical functionalization”and“electrical integration.”Finally,we discuss the prospects for future opportunities involving multifunctional integrated fiber tips.

关键词： optical fibers fiber tips optical devices nanotechnology micro-optics nano-optics.

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肠道菌群调节治疗男性2型糖尿病合并骨质疏松患者的临床意义

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当代医学 2024年第4期30卷 63-66页

作者：邹光荣彭辉李百云邹柳义熊毅丰王佳李广曾春燕宜春市人民医院内分泌科江西宜春336000 宜春市人民医院骨科江西宜春336000 宜春市人民医院药剂科江西宜春336000

目的分析肠道菌群调节治疗男性2型糖尿病(T2DM)合并骨质疏松(OP)患者的临床意义。方法选取2020年1月至2022年1月宜春市人民医院内分泌科收治的60例男性T2DM-OP患者作为研究对象,按照随机数字表法分为基础组与联药组,每组30例。基础组给... 详细信息

目的分析肠道菌群调节治疗男性2型糖尿病(T2DM)合并骨质疏松(OP)患者的临床意义。方法选取2020年1月至2022年1月宜春市人民医院内分泌科收治的60例男性T2DM-OP患者作为研究对象,按照随机数字表法分为基础组与联药组,每组30例。基础组给予基础治疗,联药组在基础组基础上给予双歧杆菌四联活菌片治疗。比较两组血清胰岛素样生长因子-1(IGF-1)、胰高血糖素样肽1(GLP-1)、骨膜蛋白(PN)水平,Ward三角区、股骨颈、腰椎L2~4体积骨密度(vBMD),及视觉模拟评分法(VAS)评分、不良反应发生率。结果治疗后,两组联合组血清IGF-1、GLP-1水平均高于基础组,PN水平低于基础组,差异有统计学意义(P<0.05)。治疗后,联药组Ward三角区、股骨颈、腰椎L2~4 vBMD均高于基础组,VAS评分均低于低于基础组,差异有统计学意义(P<0.05)。两组不良反应发生率比较差异无统计学意义。结论双歧杆菌四联活菌片可有效改善男性T2DM-OP患者骨代谢,提高骨密度,且不良反应较少,疗效显著。

关键词：双歧杆菌四联活菌男性 2型糖尿病骨质疏松症

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Fish Skin-Inspired Janus Hydrogel Coating for Drag Reduction

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Chinese Journal of Chemistry 2024年第8期42卷 867-872页

作者： Yurong Zhang Lijun Li Ruteng Wang Junwei Liu Zhen Lin Gang Li Hongtao Liu yifeng Lei Yunhe xiong Yan Zhao Longjian Xue The Institute of Technological Science School of Power and Mechanical EngineeringWuhan UniversitySouth Donghu Road 8WuhanHubei430072 China Hubei Key Laboratory of Electronic Manufacturing and Packaging Integration(Wuhan University) Wuhan UniversityWuhanHubei430072 China Department of Urology Renmin Hospital of Wuhan UniversityZhangzhidong Road 99WuhanHubei430060 China Department of Urology Renmin Hospital of Wuhan UniversityZhangzhidong Road 99WuhanHubei 430060China

Comprehensive Summary,In nature,fishes have evolved functional skins with effective hydrodynamic performance and anti-fouling,facilitating predation and escaping from *** a large number of fish scale-inspired structured surfaces have been explored,the incorporation of mucus on the structured surfaces has been largely *** by the skin of Osteichthyes fishes,a Janus hydrogel coating(JHC)is successfully prepared by a two-step UV light irradiation at room *** bottom side of JHC(STH)achieves a shear adhesive strength of 103.3±17.5 kPa and can strongly adhere to a large variety of surfaces,including metals,ceramic and *** top surface of JHC(SLH)replicates the structure of cycloid scales,while the nature of hydrogel mimics the mucus on fish *** possesses prominent mechanical,anti-swelling,anti-fouling and drag reduction *** design strategy for JHC has potential applications in numerous fields,like,pipeline transportation,bioengineering,and shipping industry.

关键词： Fish skin-inspired Artificial coating Hydrogel Drag reduction Antibacterial

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Label-free fiber nanograting sensor for real-time in situ early monitoring of cellular apoptosis

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Advanced Photonics 2022年第1期4卷 62-68页

作者： Danran Li Nina Wang Tianyang Zhang Guangxing Wu yifeng xiong Qianqian Du Yunfei Tian Weiwei Zhao Jiandong Ye Shulin Gu Yanqing Lu Dechen Jiang Fei Xu Nanjing University College of Engineering and Applied SciencesNanjingChina Nanjing University National Laboratory of Solid State MicrostructuresCollaborative Innovation Center of Advanced MicrostructuresNanjingChina Nanjing University School of Chemistry and Chemical EngineeringNanjingChina Nanjing University School of Electronic Science and EngineeringNanjingChina

The achievement of functional nanomodules for subcellular label-free measurement has long been pursued in order to fully understand cellular ***,a compact label-free nanosensor based on a fiber taper and zinc oxide nanogratings is designed and applied for the early monitoring of apoptosis in individual living *** of its nanoscale dimensions,mechanical flexibility,and minimal cytotoxicity to cells,the sensing module can be loaded in cells for long term in situ tracking with high sensitivity.A gradual increase in the nuclear refractive index during the apoptosis process is observed,revealing the increase in molecular density and the decrease in cell *** strategy used in our study not only contributes to the understanding of internal environmental variations during cellular apoptosis but also provides a new platform for nonfluorescent fiber devices for investigation of cellular events and understanding fundamental cell biochemical engineering.

关键词： fiber nanogratings label-free sensor apoptosis monitoring

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搅拌摩擦加工Al-Pb表面复合材料的微结构和织构

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稀有金属材料与工程 2021年第3期50卷 957-962页

作者：许峰杨莉熊义峰刘坡张尧成常熟理工学院汽车工程学院江苏常熟215500 桂林航天工业学院机械工程学院广西桂林541004

采用搅拌摩擦加工(FSP)方法制备Al-Pb表面复合材料,以提高其减摩抗磨性能,使用SEM、EBSD、纳米压痕仪和显微硬度计等分析其微观组织、织构和硬度分布。结果表明:使用FSP方法制备Al-Pb表面复合材料,Pb颗粒受到重力和搅拌作用,主要分布于... 详细信息

采用搅拌摩擦加工(FSP)方法制备Al-Pb表面复合材料,以提高其减摩抗磨性能,使用SEM、EBSD、纳米压痕仪和显微硬度计等分析其微观组织、织构和硬度分布。结果表明:使用FSP方法制备Al-Pb表面复合材料,Pb颗粒受到重力和搅拌作用,主要分布于盆状搅拌加工区的底部。塑性金属对流形成的洋葱环结构中,存在富Pb片层和形变铝基体片层。富Pb片层内的Pb颗粒,起到了良好的细化晶粒作用。形变铝基体片层分布有少量直径约100 nm的新生Pb粒。受到细晶强化作用影响,富Pb颗粒区的硬度显著高于形变铝基体。加工区底部的SZ-AS区形成强Cube再结晶织构;SZ-RS区形成Cube织构和少量Brass织构;CSZ区的Cube织构较少,{111}织构增强;上部的AS区形成强Goss织构,RS区织构相对随机。

关键词：搅拌摩擦加工电子背散射衍射(EBSD) 微结构织构

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