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Sub-nanometer finishing of polycrystalline tin by inductively coupled plasma-assisted cutting

Frontiers of Mechanical Engineering 2023年第3期18卷 233-249页

作者： Peng LYU Min lai Yifei SONG Zhifu xue Fengzhou FANG State Key Laboratory of Precision Measuring Technology&Instruments Laboratory of MicroNano Manufacturing TechnologyMNMTTianjinUniversityTianjin300072China Centre of MicroNano Manufacturing Technology-MNMT-Dublin School of Mechanical&Materials EngineeringUniversity College DublinDublin4Ireland

Polycrystalline tin is an ideal excitation material for extreme ultraviolet light ***,the existence of grain boundary(GB)limits the surface roughness of polycrystalline tin after single-point diamond turning(SPDT).In this work,a novel method termed inductively coupled plasma(ICP)-assisted cutting was developed for the sub-nanometer finishing of polycrystalline *** relationship between ICP power,processing time,and modification depth was established by thermodynamic simulation,and the fitted heat transfer coefficient of polycrystalline tin was 540 W/(m2·K).The effects of large-thermal-gradient ICP treatment on the microstructure of polycrystalline tin were *** 0.9 kW ICP processing for 3.0 s,corresponding to the temperature gradient of 0.30 K/μm,the grain size of polycrystalline tin was expanded from a size of approximately 20-80μm to a millimeter *** Taguchi method was used to investigate the effects of rotational speed,depth of cut,and feed rate on *** conducted based on the ICP system indicated that the plasma-assisted cutting method promoted the reduction of the influence of GB steps on the finishing of polycrystalline tin,thereby achieving a surface finish from 8.53 to 0.80 nm in *** results of residual stress release demonstrated that the residual stress of plasma-assisted turning processing after 504 h stress release was 10.7 MPa,while that of the turning process without the ICP treatment was 41.6 MPa.

关键词： plasma-assisted cutting polycrystalline tin single-point diamond turning surface roughness

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Application of pediatric ocular trauma score in pediatric open globe injuries

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International Journal of Ophthalmology(English edition) 2020年第7期13卷 1097-1101页

作者： Chao xue Li-chun Yang Yi-chun Kong Tianjin Eye Hospital Tianjin Key Laboratory of Ophthalmology and Visual ScienceTianjin Eye Institute Clinical College of Ophthalmology Tianjin Medical UniversityTianjinChina

AIM:To evaluate the predictive value of pediatric penetrating ocular trauma score(POTS)on the visual outcome in children with open globe ***:A retrospective study in 90 children(60 males and 30 females)aged 1-15 y(average,7.48±2.86 y)with penetrating ocular trauma was *** patient’s POTS was *** effects of POTS on final visual acuity(FVA)were *** between factors affecting POTS and the FVA was ***:All patients presented with single-eye *** follow-up time was 3-21 mo(average,10.23±3.54 mo).Among the 90 cases of penetrating wounds,71 eyes(78.89%)were injured in Zone I(wound involvement limited to the cornea,including the corneoscleral limbus),17 eyes(18.89%)were injured in Zone II(wound involving the sclera and no more posterior than 5 mm from the corneoscleral limbus),and 2 eyes(2.22%)were injured in Zone III(wound involvement posterior to the anterior 5 mm of the sclera).Analysis of POTS and FVA showed important correlation between them(r=0.414,P=0.000).Initial visual acuity(P=0.00),age(P=0.02),injury location(P=0.002),traumatic cataract(P=0.00),vitreous hemorrhage(P=0.027),retinal detachment(P=0.003),and endophthalmitis(P=0.03)were found to be statistically significant factors for the FVA ***:Ocular trauma presents serious consequences and poor prognosis in *** POTS may be a reliable prognostic tool in children with open globe injury.

关键词： the pediatric penetrating ocular trauma score children open globe injury predictive value

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Tappet Chill Depth Measuring by Magnetic Permeability and Inductance Displacement Meter

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Journal of Iron and Steel Research International 2001年第2期8卷 59-60页

作者： ZENG Hui WANG xue-hua YAN chun Wuhan University of Technology

It is possible to measure different position along the axle direction of *** to the maximum output of signal,the boundary of white iron structure and mottled iron structure can be deduced,and at the same time,it is possible to use inductance displacement meter to show the chill depth which is the distance from the boundary to the end.

关键词： magnetic permeability chilled cast iron chill depth

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Staged dendrite suppression for high safe and stable lithium-sulfur batteries

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Journal of Energy Chemistry 2025年第1期100卷 674-683页

作者： Jun Jiang Zhenjie Lu Yanwen Ding Shujun Liu Zhijie Qi Tian Tang Yunfan Zhang Zhiyuan Ma Jingwen Sun Liang xue Wenyao Zhang Pan Xiong Xin Wang Junwu Zhu Yongsheng Fu Key Laboratory for Soft Chemistry and Functional Materials of Ministry of Education Nanjing University of Science and Technology Jiangsu Pylon Battery Co.Ltd

The unavoidable dendrite growth and shuttle effect have long been stranglehold challenges limiting the safety and practicality of lithium-sulfur ***,we propose a dual-action strategy to address the lithium dendrite issue in stages by constructing a multifunctional surface-negatively-charged nanodiamond layer with high ductility and robust puncture resistance on polypropylene （PP） *** uniformly loaded compact negative layer can not only significantly enhance electron transmission efficiency and promote uniform lithium deposition,but also reduce the formation of dendrite during early deposition *** importantly,under the strong puncture stress encountered during the deterioration of lithium dendrite growth under limiting current,the high ductility and robust puncture resistance（145.88 MPa） of as-obtained nanodiamond layer can effectively prevent short circuits caused by unavoidable lithium *** Li||Li symmetrical cells assembled with nanodiamond layer modified PP demonstrated a stable cycle of over 1000 h at 2 mA cm-2with a polarization voltage of only 29.3 ***,the negative charged layer serves as a physical barrier blocking lithium polysulfide ions,effectively mitigating capacity *** improved cells achieved a capacity decay of only 0.042%per cycle after 700 cycles at 3 C,demonstrating effective suppression of dendrite growth and capacity attenuation,showing promising prospect.

关键词： Lithium-sulfur batteries Staged dendrite suppression Shuttle effect Surface-negatively-charged nanodiamond

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A method and results of color calibration for the Chang'e-3 terrain camera and panoramic camera

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Research in Astronomy and Astrophysics 2014年第12期14卷 1557-1566页

作者： Xin Ren chun-lai Li Jian-Jun Liu Fen-Fei Wang Jian-Feng Yang En-Hai Liu Bin xue Ru-Jin Zhao Key Laboratory of Lunar and Deep Space Exploration National Astronomical ObservatoriesChinese Academy of Sciences Xi’an Institute of Optics and Precision Mechanics Chinese Academy of Sciences Institute of Optics and Electronics Chinese Academy of Sciences

The terrain camera （TCAM） and panoramic camera （PCAM） are two of the major scientific payloads installed on the lander and rover of the Chang＇e 3 mission re- spectively. They both use a Bayer color filter array covering CMOS sensor to capture color images of the Moon＇s surface. RGB values of the original images are related to these two kinds of cameras. There is an obvious color difference compared with human visual perception. This paper follows standards published by the International Commission on Illumination to establish a color correction model, designs the ground calibration experiment and obtains the color correction coefficient. The image qual- ity has been significantly improved and there is no obvious color difference in the corrected images. Ground experimental results show that：（1） Compared with uncor- rected images, the average color difference of TCAM is 4.30, which has been reduced by 62.1%. （2） The average color differences of the left and right cameras in PCAM are 4.14 and 4.16, which have been reduced by 68.3% and 67.6% respectively.

关键词： Moon -- methods: data analysis -- techniques: image processing

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Development path of Chinese low-carbon cities based on index evaluation

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Advances in Climate Change Research 2018年第2期9卷 144-153页

作者： YANG Xiu WANG xue-chun ZHOU Ze-Yu National Center for Climate Change Strategy and International Cooperation Beijing 100038 China

This work takes the 36 cities from China＇s low-carbon pilot project as the research object and uses the carbon emission per capita and GDP per capita to categorize the 36 cities into four types to reveal their low-carbon development status; these four types are leading cities, developing cities, latecomer cities, and exploring cities. On the basis of an index system that quantitatively describes low-carbon development, this research analyzes the characteristics, development trends, and low-carbon development pathways of the four types of cities. According to the present situation and objectives of national emissions and considering the differences in development stages, challenges, and opportunities for each type of the city, this research presents recommendations for the low-carbon roadmap and the medium- and long-term （by 2030） emission trend routes of different types of regions in China.

关键词： City Low-carbon development Index evaluation Development path

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High-efficiency stretchable organic light-emitting diodes based on ultra-flexible printed embedded metal composite electrodes

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InfoMat 2023年第5期5卷 28-39页

作者： Lan-Qian Yao Yue Qin Xiang-chun Li Qian xue Fang Liu Tao Cheng Guan-Jun Li Xinwen Zhang Wen-Yong lai State Key Laboratory of Organic Electronics and Information Displays(SKLOEID) Institute of Advanced Materials(IAM)Nanjing University of Posts&TelecommunicationsNanjingthe People's Republic of China Frontiers Science Center for Flexible Electronics(FSCFE) MIIT Key Laboratory of Flexible Electronics(KLoFE)Northwestern Polytechnical UniversityXi'anthe People's Republic of China

Stretchable organic light-emitting diodes(OLEDs)are important components for flexible/wearable ***,the efficiency of the existing stretchable OLEDs is still much lower as compared with their rigid counterparts,one of the main reasons being the lack of ideal flexible transparent ***,we propose and develop a printed embedded metal composite electrode(PEMCE)strategy that enables the fabrication of ultra-thin,highly flexible transparent electrodes with robust mechanical *** the flexible transparent electrodes serves as the anodes,flexible/stretchable white OLEDs have been successfully constructed,achieving a current efficiency of up to 77.4 cd A^(-1)and a maximum luminance of 34787 cd m^(-2).The current efficiency of the resulting stretchable OLEDs is the highest ever reported for flexible/stretchable white OLEDs,which is about 1.2 times higher than that of the reference rigid devices based on ITO/glass *** excellent optoelectronic properties of the printed embedded transparent electrodes and the light extraction effect of the Ag-mesh account for the significant increase in current ***,the electroluminescence performance still retains~83%of the original luminance even after bending the device 2000 cycles at a radii of~0.5 *** importantly,the device can withstand tensile strains of up to~100%,and even mechanical deformation of 90%tensile strain does not result in a significant loss of electroluminescence performance with current efficiency and luminance maintained at over 85%.The results confirm that the PEMCE strategy is effective for constructing ultra-flexible transparent electrodes,showing great promise for use in a variety of flexible/stretchable electronics.

关键词： flexible electrodes flexible electronics printed embedded metal composite electrodes stretchable OLEDs transparent electrodes

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Modulation of Soil Particle Size and Nutrient Availability in the Maize Rhizosheath

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Pedosphere 2011年第4期21卷 483-490页

作者： MA Wei LI xue-Xian LI chun-Jian Department of Plant Nutrition China Agricultural University Beijing 100193 (China)

Root exudates,microorganism colonization and soil aggregates together form the rhizosheath,a special cylinder of micro-ecosystem adhering to the root *** study how the rhizosheath affects soil structure and nutrient distribution,we analyzed the impact of maize rhizosheath on soil particle size and nutrient availability in pot and field *** results showed that there was a significant size decrease of soil particles in the ***,the soil mineral nitrogen in the rhizosheath was significantly higher than that in the rhizosphere or bulk soil at tasseling and maturity stages of *** contents of Fe and Mn were also differentially altered in the *** development,indicated by a dry weight ratio of rhizosheath soil to the root,was relatively independent of root development during the whole experimental *** formation of maize rhizosheath contributed to the modulation of soil particle size and nutrient *** subtle local changes of soil physical and chemical properties may have profound influence on soil formation,rhizospheric ecosystem initiation,and mineral nutrient mobilization over the long history of plant evolution and domestication.

关键词： micronutrient mineral nitrogen mucilage rhizosphere root exudates

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Optimal Control Problem Governed by Semilinear Parabolic Equation and its Algorithm

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Acta Mathematicae Applicatae Sinica 2008年第1期24卷 29-40页

作者： chun-fa Li xue Yang En-min Feng School of Management Tianjin University of Technology Tianjin 300191 China School of Management Tianjin University Tianjin 300072 China Department of Applied Mathematics Dalian University of Technology Dalian 116024 China

In this paper, an optimal control problem governed by semilinear parabolic equation which involves the control variable acting on forcing term and coefficients appearing in the higher order derivative terms is formulated and analyzed. The strong variation method, due originally to Mayne et al to solve the optimal control problem of a lumped parameter system, is extended to solve an optimal control problem governed by semilinear parabolic equation, a necessary condition is obtained, the strong variation algorithm for this optimal control problem is presented, and the corresponding convergence result of the algorithm is verified.

关键词： Distributed parameter system strong variation method optimal control adjoint system semilinear parabolic equations

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Wavelength-Tunable Rectangular Pulse Dissipative Soliton Operation of an Erbium-Doped Mode-Locked Fiber Laser

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Chinese Physics Letters 2014年第4期31卷 68-71页

作者： HU xue-Juan GUO chun-Yu RUAN Shuang-Chen Shenzhen Key Laboratory of Laser Engineering Key Laboratory of Advanced Optical Precision Manufacturing Technology of Guangdong Higher Education Institutes College of Electronic Science and Technology Shenzhen University Shenzhen 518060

The wavelength-tunable rectangular pulse dissipative soliton （DS） is experimentally demonstrated, for the first time to the best of our knowledge, in an erbium-doped figure-of-eight fiber laser based on the nonlinear amplifying loop mirror mode-locked technique. The proposed rectangular pulse DS fiber laser can operate in the wavelength- tunable mode-locked state from 1573.5nm to 159d.6 nm with the rotation of the polarization controllers. The achieved output wavelengths are 1573.5nm, 1576.3nm, 1586.8nm, 1590.4nm and 1594.6nm, respectively. The pulse widths of the rectangular pulse can also be tuned from ~8ns to ~24ns by adjusting the pump power. The fundamental repetition rate of the rectangular pulse DS is 1.154 MHz and the output power is 6.1d m W （at 1594.6 nm）.

关键词： Laser Wavelength-Tunable first

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