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A NOVEL SWEPT LASER SOURCE BASED ON COMBINED TUNABLE FILTERS FOR OCT

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Journal of Innovative Optical Health Sciences 2011年第1期4卷 53-58页

作者： minghui chen ZHIHUA DING LING WANG TONG WU YUANHAO TAO State Key Laboratory of Modern Optical Instrumentation Zhejiang University Hangzhou Zhejiang 310027China

A novel broad tunable bandwidth and narrow instantaneous line-width linear swept laser source using combined tunable filters working at 1,300 nm center wavelength is *** combined filters consist of a fiber FabryPerot tunable filter and a tunable filter based on diffractive grating with scanning polygon *** contrast to traditional method using single tunable filter,the trade-off between bandwidth and instantaneous line-width is *** implementation of two semiconductor optical amplifiers with different wavelength range is adopted in the laser resonator for broadband light *** Fourier domain mode locking swept laser source with combined tunable filters offers broadband tunable range with narrow instantaneous line-width,which is especially benefiting for high-quality optical frequency domain *** proposed Fourier domain mode locking swept laser source provides a tuning range of 160 nm with instantaneous line-width of about 0.01nm at sweeping rate of 15 kHz,a finesse of 16,000 is thus achieved.

关键词： Swept laser source tunable filter optical frequency domain imaging

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研究生联合培养的实践与思考

卫生职业教育 2025年第1期43卷 8-11页

作者：李菁菁吴怡陈明慧徐州医科大学医学影像学院江苏徐州221004

围绕国内外研究生联合培养模式现状,结合徐州医科大学医学影像学院在研究生联合培养方面的探索与实践,提出构建研究生联合培养体系和推进质量评价闭环管理的必要性,助力研究生联合培养质量的不断提升。

关键词：研究生联合培养培养基地

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A grey dynamic model for the evaluation of regional sustainable development and its empirical study

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Ecological Economy 2007年第4期3卷 443-455页

作者： Jiang minghui chen Wei School of Management Harbin Institute of Technology Harbin 150001 P.R.China

Currently, traditional development issues, such as economic stagnation, as well as new challenges like environmental degradation and globalization, need attention. Sustainable development, including economic, environmental, and social elements, is a main goal of decision-makers. The key to sustainable decision-making is to evaluate and forecast the status quo of sustainable development. Policy makers need a tool based on scientific information to forecast the effects of future actions on sustainability and make policies for sustainable development. This paper analyzes the relation of the economy, environment and social welfare by the grey dynamic model. The proposed method uses time series and basic indicators of ecological system, including economic, environmental and social sub-systems. It is applied to Heilongjiang Province and Jiangsu Province. The results have proved different status quo of sustainable development in these two regions, and suggestions are proposed, such as optimization of industrial structure and eco-industrial development. The conclusion is that there is no unique sustainable path, and accordingly, policy makers should choose different criteria and strategies to make efficient sustainable decisions for each region.

关键词： Sustainable development Indicators of ecological system Grey dynamic evaluation

Microstructure and composition evolution of a single-crystal superalloy caused by elements interdiffusion with an overlay NiCrAlY coating on oxidation

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Journal of Materials Science & Technology 2020年第10期42卷 49-58页

作者： Lanlan Yang minghui chen Jinlong Wang Yanxin Qiao Pingyi Guo Shenglong Zhu Fuhui Wang School of Materials Science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China Shenyang National Laboratory for Materials Science Northeastern UniversityShenyang 110819China Institute of Metal Research Chinese Academy of ScienceShenyang 110016China

MCrAlY(M=Ni and/or Co)overlay coating is widely used as a protective coating against high temperature oxidation and ***,due to its big difference in chemical composition with the underlying superalloy,elements interdiffusion occurs *** of the direct results is the formation of interdiffusion zone(IDZ)and secondary reaction zone(SRZ)with a high density of fine topological closed-packed phases(TCPs),weakening dramatically the mechanical properties of the alloy *** is by now the main problem of modern high-temperature metallic coatings,but there are still hardly any reports studying the formation,growth and transformation of IDZ and SRZ in deep,as well as the precipitation of *** this work,a typical NiCrAlY coating is deposited by arc ion plating on a single-crystal superalloy *** interdiffusion between them and its relationship on microstructure were *** rather than Al from the coating diffuses into the alloy at high temperatures and segregates immediately beneath their interface,contributing largely to the formation of ***,diffusion of Ni from the deep alloy to IDZ leads to the formation and continuous expansion of SRZ.

关键词： Single-crystal superalloys NiCrAlY coating High-temperature oxidation Arcion plating Elements interdiffusion Microstructure

Phase structure of sputtered Ta coating and its ablation behavior by laser pulse heating(LPH)

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Journal of Materials Science & Technology 2021年第6期65卷 7-17页

作者： Yunsong Niu Lingling Xing Feng Yang Huawei Li minghui chen Shenglong Zhu Fuhui Wang Corrosion and Protection Division Shenyang National Laboratory for Materials Science.Institute of Metal ResearchChinese Academy of SciencesShenyang110016China College of Chemistry and Chemical Engineering Shenyang Normal UniversityShenyang110034China School of Equipment Engineering Shenyang Ligong University.Shenyang110159China Corrosion and Protection Division Shenyang National Laboratory for Materials ScienceNortheastern UniversityShenyang110819China

Phase structure of sputtered Ta coating in the negative glow space and LPH effect were *** whole coating/substrate system is substrate→physically gas-absorbed Fe surface→oxygen-enriched TaOx layer→amorphous Ta→αandβdual phase→singleα*** LPH course,micro structure of Ta coating shows intact,only a few cracks emerge after 100 laser pulses,exhibiting thin HAZ but thick Fe/Ta ICZ,without martensitic *** the electrodeposited Cr coating,continuous thermal stresses produce many extra micro-crack,substrate oxidation and martensitic transformation,leading to crack propagations and final bulk delamination,without any ICZ.

关键词： Sputtered Ta coating Phase structure Laser pulse heating Inter-connected zone(ICZ) Heat-affected zone(HAZ) Ablation

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钬、铥激光作用于软组织热效应的实验研究

光学技术 2025年第1期51卷 54-59,93页

作者：陈明惠鲍睿许诗怡冯媛媛汪宏旺郑刚王援柱上海理工大学健康科学与工程学院上海介入医疗器械工程技术研究中心上海200093 上海瑞柯恩激光技术有限公司上海200120

为了提高激光手术效率和减少激光手术中对周围健康组织的损伤,探究了脉冲钬激光脉冲峰值功率、连续铥激光功率对于软组织热效应的影响。搭建体外模型装置来寻求激光消融组织的最佳参数,实验中脉冲钬激光功率分别为20W、40W、60W、80W,... 详细信息

为了提高激光手术效率和减少激光手术中对周围健康组织的损伤,探究了脉冲钬激光脉冲峰值功率、连续铥激光功率对于软组织热效应的影响。搭建体外模型装置来寻求激光消融组织的最佳参数,实验中脉冲钬激光功率分别为20W、40W、60W、80W,脉冲持续时间为200μs和800μs,脉冲能量分别选择1J、2J、4J。连续铥激光功率分别为20W、40W、60W、80W、100W、110W。最后,将体外模型置于生理盐水中,保持室温一定,对激光消融后的损伤组织进行切片和染色,分析病理切片。脉冲峰值功率对软组织的消融区产生较大影响,脉冲能量为4J×10Hz的激光组合比1J×40Hz的激光组合产生的消融深度提高111.82%,对凝固区的影响不大,改变仅为9.96%。脉冲持续时间对软组织的影响不大,脉宽较短产生的消融深度提高18.49%。组织消融深度随连续铥激光的功率提高而提高,消融效率也相应提高,热凝固区几乎不受影响。100W的消融效率比20W提高88.26%。

关键词：医疗光学仪器组织消融光热效应体外实验

In-situ doping strategy for improving the photocatalytic hydrogen evolution performance of covalent triazine frameworks

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Science China Chemistry 2023年第8期66卷 2363-2370页

作者： minghui chen Ji Xiong Xiangyu Li Quan Shi Ting Li Yaqing Feng Bao Zhang School of Chemical Engineering and Technology Tianjin UniversityTianjin300350China Collaborative Innovation Center of Chemical Science and Engineering(Tianjin) Tianjin300072China Haihe Laboratory of Sustainable Chemical Transformations Tianjin300192China

A highly conjugated network of covalent triazine frameworks(CTFs)on the one hand promotes light-harvesting,but on the other hand,also results in high carrier recombination which eventually limits their photocatalytic hydrogen evolution reaction(HER)***,strategies to favorably tune the electronic configuration of CTFs for efficient photocatalytic HERs need to be developed,but still remain ***,a simple in-situ defect strategy involving element doping is developed for the first time to introduce a heteroatom including S and Se into CTF-1 via the condensation of aldehydes with the mixture of the terephthalimidamide and the S-or Se-substituted terephthalimidamide under mild *** doping content(X)is varied,resulting in a series of S-and Se-doped CTFs,named CTFS-1-X and CTFSe-1-X,***,for the S-doped CTFs,CTFS-1-10 shows the most excellent HER rate(4,992.3μmol g^(-1)h^(-1))from water splitting,while for the Se-doped ones,CTFSe-1-10 exhibits a photocatalytic HER rate of 5,792.8μmol g^(-1)h^(-1),both of which far surpass undoped CTFs(693.3μmol g^(-1)h^(-1)).In-depth studies indicate that the introduction of S or Se atoms into CTFs could extend the light absorption and promote photo-generated electron-hole pairs ***,S-or Se-doping could create heterogeneous electronic configuration in CTFs,which can help to suppress carrier recombination.

关键词： covalent triazine frameworks heteroatom doping hydrogen evolution

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DEVELOPMENT OF HIGH-SPEED SWEPT-SOURCE OPTICAL COHERENCE TOMOGRAPHY SYSTEM AT 1320 nm

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Journal of Innovative Optical Health Sciences 2009年第1期2卷 117-122页

作者： TONG WU ZHIHUA DING minghui chen LEI XU GUOHUA SHI YUDONG ZHANG State Key Laboratory of Modern Optical Instrumentation Zhejiang University Hangzhou Zhejiang 310027China

A swept-source optical coherence tomography(SSOCT)system based on a high-speed scanning laser source at center wavelength of 1320 nm and scanning rate of 20 kHz is *** axial resolution is enhanced to 8.3μm by reshaping the spectrum in frequency domain using a window function and a wave number calibration method based on a Mach-Zender Interferometer(MZI)integrated in the SSOCT *** imaging speed and depth range are 0.04 s per frame and 3.9 mm,*** peak sensitivity of the SSOCT system is calibrated to be 112 *** the developed SSOCT system,optical coherence tomography(OCT)images of human finger tissue are obtained which enable us to view the sweat duct(SD),stratum corneum(SC)and epidermis(ED),demonstrating the feasibility of the SSOCT system for in vivo biomedical imaging.

关键词： Medical optics and biotechnology optical coherence tomography swept-source

Microstructure and Improved Thermal Shock Behaviour of an In Situ Formed Metal-Enamel Interlocking Coating

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Acta Metallurgica Sinica(English Letters) 2021年第8期34卷 1131-1141页

作者： Hang Wang Chuan Zhang chengyang Jiang Lijuan Zhu Lihong Han minghui chen Shujiang Geng Fuhui Wang Tubular Goods Research Institute of CNPC Xi’an 710077China State Key Laboratory of Performance and Structural Safety for Petroleum Tubular Goods and Equipment Materials Xi’an 710077China CNPC Bomco Drilling&Production Equipment Co.LTD. Guanghan 618300China Shenyang National Laboratory for Materials Science Northeastern UniversityShenyang 110819China

A novel metal-enamel interlocking coating was designed and prepared in situ by co-deposition of Ni-enamel composite layer and subsequent air spray of enamel with 10 wt% nanoscale Ni. During the firing process, the external enamel layer was melted and jointed with the enamel particles at the upper part of the Ni-plating layer to form the enamel pegs. Thermal shock tests of pure enamel, enamel with 10 wt% Ni composite and metal-enamel interlocking coatings were conducted at 600 °C in water and static air. The results indicated that the metal-enamel interlocking showed superior thermal shock resistance to both pure enamel and enamel with 10 wt% Ni composite coatings. The enhanced performance was mainly attributed to the advantageous effects of mechanical interlocking of the enamel pegs formed at the enamel/Ni-plating interface. Meanwhile, during thermal shock test, big clusters formed by nanoscale Ni agglomerations were oxidised to be a Ni/NiO core–shell structure while small single nanoscale Ni grains were oxidised completely, which both improved the thermal shock resistance of enamel coating significantly.

关键词： Enamel Interlocking Thermal shock Nanoscale Ni