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International Journal of Ophthalmology(English edition) 2024年第10期17卷 1763-1771页

作者： chen yu lin Hung Ju chen Yi Kit Chan Wei Ping Hsia yu Len Huang Chia Jen Chang Department of Ophthalmology Taichung Veterans General HospitalTaichung 407TaiwanChina Department of Computer Science Tunghai UniversityTaichung 407TaiwanChina

AIM:To develop an automated model for subfoveal choroidal thickness(SFCT)detection in optical coherence tomography(OCT)images,addressing manual fovea location and choroidal contour ***:Two procedures were proposed:defining the fovea and segmenting the *** localization from B-scan OCT image sequence with three-dimensional reconstruction(LocBscan-3D)predicted fovea location using central foveal depression features,and fovea localization from two-dimensional en-face OCT(LocEN-2D)used a mask region-based convolutional neural network(Mask R-CNN)model for optic disc detection,and determined the fovea location based on optic disc relative *** segmentation also employed Mask ***:For 53 eyes in 28 healthy subjects,LocBscan-3D’s mean difference between manual and predicted fovea locations was 170.0μm,LocEN-2D yielded 675.9μ***-2D performed better in non-high myopia group(P=0.02).SFCT measurements from Mask R-CNN aligned with manual ***:Our models accurately predict SFCT in OCT ***-3D excels in precise fovea localization even with high ***-2D shows high detection rates but lower accuracy especially in the high myopia *** both models offers a robust SFCT assessment approach,promising efficiency and accuracy for large-scale studies and clinical use.

关键词： subfoveal choroidal thickness optical coherence tomography automatic foveal detection automatic choroid segmentation

西部陆海新通道建设下广西北部湾港竞争力研究

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物流工程与管理 2024年第2期46卷 12-15页

作者：陈林玉北海职业学院广西北海536000

在新发展格局下,港口之间的竞争不断加剧。作为西部陆海新通道的重要枢纽,提升广西北部湾港港口竞争力,打造北部湾国际枢纽海港尤为重要。文中通过构建港口竞争力评价指标体系,运用因子分析法对广西北部湾港与上海港、深圳港、广州港等1... 详细信息

在新发展格局下,港口之间的竞争不断加剧。作为西部陆海新通道的重要枢纽,提升广西北部湾港港口竞争力,打造北部湾国际枢纽海港尤为重要。文中通过构建港口竞争力评价指标体系,运用因子分析法对广西北部湾港与上海港、深圳港、广州港等15个港口的竞争力进行评价分析,并根据评价分析结果,结合广西北部湾港的战略定位和发展新机遇,提出提升港口竞争力的对策与建议,以期推动广西北部湾港高质量发展,助力西部陆海新通道建设。

关键词：港口竞争力广西北部湾港西部陆海新通道

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农村人力资本对城乡收入差距的影响研究

安徽农业科学 2024年第8期52卷 192-195页

作者：陈林瑜张佳长江大学经济与管理学院湖北荆州434020

教育差距是中国城乡收入差异最主要的影响因素之一,而高等教育是培养优秀人力资源的重要途径,在提高农民文化水平与劳动技能中,教育资源的投入起到了显著作用,并且有效提高了其劳动生产率,促进农民增收就业,进而缩小城乡人均收入的差异... 详细信息

教育差距是中国城乡收入差异最主要的影响因素之一,而高等教育是培养优秀人力资源的重要途径,在提高农民文化水平与劳动技能中,教育资源的投入起到了显著作用,并且有效提高了其劳动生产率,促进农民增收就业,进而缩小城乡人均收入的差异。利用我国2008—2020年的31个省(市)的省级面板数据,运用普通最小二乘法(OLS)探究农村人力资本对城乡收入差距的影响,利用中介效应模型检验了农村人力资本投入在粮食安全提高的影响下是否能有效缩小城乡收入差距。研究表明:①农村人力资本投入对缩小城乡收入差距起到了显著作用,其中中部地区的作用最大,而东、西部地区相较于中部地区的效果较弱。②在农村人力资本与城乡收入差距产生的效应中,粮食生产起到了积极的中介作用,这一点在中部地区最为明显。据此,提出相应的政策建议,以期为推动农业发展水平进步、农村地区振兴、农民收入切实提高提供参考,最终促进中国经济的快速、均衡和可持续发展。

关键词：农村人力资本城乡收入差距粮食安全中介效应模型

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CCR7/p-ERK1/2/VEGF signaling promotes retinal neovascularization in a mouse model of oxygen-induced retinopathy

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International Journal of Ophthalmology(English edition) 2017年第6期10卷 862-869页

作者： lin-Hui yuan Xiao-Long chen yu Di Mei-lin Liu Department of Ophthalmology Shengjing Affiliated Hospital of China Medical University Shenyang 110000 Liaoning Province China

AIM： To investigate the role of CCR7/p-ERKI/2/VEGF signaling in the mouse model of oxygen-induced retinopathy （OIR）. METHODS： Neonatal C57BL/6J mice were evenly randomized into four groups： normoxia, OIR, OIR control （treated with scramble siRNA）, and OIR treated （treated with CCR7 siRNA）. Normoxia group was not specially handled. Postnatal day 7 （P7） mice in the OIR group were exposed to 75%±5% oxygen for 5d （P7-P12） and then maintained under normoxic conditions for 5d （P12-P17）. Mice in the OIR control and OIR treated groups were given injections of scramble or CCR7 siRNA plasmid on P12 before returning to normoxic conditions for 5d （P12-P17）. Retina samples were collected from all mice on P17, stained with adenosine diphosphatase （ADPase）, and retinal neovascularization （RNV） was assessed. Retinas were also stained with hematoxylin and eosin （H＆E） for RNV quantitation. The distribution and expression of CCR7, p-ERKI/2 and vas- cular endothelial growth factor （VEGF） were assessed via immunohistochemistry, Western blot, and quantitative real-time polymerase chain reaction （qRT-PCR）. RESULTS： High oxygen promoted retinal neovascularization （P〈0.05） and increased the number of endothelial nuclei in new vessels extending from the retina to the vitreous body; CCR7 promoted this process （P〈0.05）. CCR7 and VEGF mRNA were expressed at higher levels in the OIR and OIR control groups than in the normoxia and OIR treated groups. CCR7, p-ERK1/2, and VEGF protein were expressed in the retinas of mice in the OIR and OIR control groups. Intravitreal injection of CCR7 siRNA significantly reduced CCR7, p-ERKI/2, and VEGF expression in the OIR mouse model （all P〈0.05）. CCR7 significantly enhancedthe neovascularization and non-perfusion areas in the OIR group （P〈0,05）, CCR7 siRNA significantly reduced levels of p-ERK1/2 and VEGF as compared to OIR controls （P〈0.05）. CONCLUSION： These results suggest that CCR7/p-ERK I/2NEGF signaling plays an important role in OIR, CCR7 may be a p

关键词： chemokine receptor type 7 vascularendothelial growth factor extracellular signal-regulated kinase retinal neovascularization retinopathy ofpremamrity

Kinetic Behavior of Aggregation-Exchange Growth Process with Catalyzed-Birth

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Communications in Theoretical Physics 2007年第3期47卷 479-486页

作者： HAN An-Jia chen yu lin Zhen-Quan KE Jian-Hong Department of Physics Wenzhou University Wenzhou 325027 China

We propose an aggregation model of a two-species system to mimic the growth of cities＇ population and assets, in which irreversible coagulation reactions and exchange reactions occur between any two aggregates of the same species, and the monomer-birth reactions of one species occur by the catalysis Of the other species. In the case with population-catalyzed birth of assets, the rate kernel of an asset aggregate Bκ of size k grows to become an aggregate Bκ＋1 through a monomer-birth catalyzed by a population aggregate Aj of size j is J（κ,j） = Jkjλ. And in mutually catalyzed birth model, the birth rate kernels of population and assets are H（k,j）=Hkjη and J（k,j） = Jkjλ, respectively. The kinetics of the system is investigated based on the mean-field theory. In the model of population-catalyzed birth of aseets, the long-time asymptotic behavior of the assets aggregate size distribution obeys the conventional or modified scaling form. In mutually catalyzed birth system, the asymptotic behaviors of population and assets obey the conventional scaling form in the case of η=λ =0, and they obey the modified scaling form in the case of η=0, λ=1. In the case of η = λ= 1, the total mass of population aggregates and that of asset aggregates both grow much faster than those in population-catalyzed birth of assets model, and they approaches to infinite values in finite time.

关键词： kinetic behvavior aggregation-exchange growth catalyzed-birth scaling law rate equations

Heat Transfer Characteristics of a Microchannel Heat Sink with Highly-Dense Micro-Jet Arrays

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Journal of Thermal Science 2024年第3期33卷 1148-1160页

作者： ZHANG yu chen Xiaoyan MIAO lin chen Liang HOU yu State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong UniversityXi’an710049China Beijing Aerospace Technology Institute Beijing100083China

This paper proposed a new structure of highly-dense micro-jet arrays for hybrid jet-impingement/microchannel heat sinks(~120 jet per cm^(2) with jet width of 0.35 mm).Parametric study is performed to investigate the influence of structure and flow parameters on the convective heat transfer of water jet cooling in confined *** simulation results show that the optimal jet width,jet spacing and impingement distance are around 0.2 mm,0.2 mm and 0.3 mm,respectively,which can achieve a low thermal resistance as well as a relatively low pressure *** analysis of the heat transfer pathways shows that the micro-fin jet structures can extend the impinging heat transfer area and conduct a considerable proportion of heat,which can reach up to 38.9%with the Reynolds number ranging from 797.1 to *** heat transfer characteristics in the heat sink will shift from impingement dominated heat transfer to the channel-convection dominated heat transfer as the jet impingement distance increases.A correlation is proposed to predict the average Nusselt number on the stagnation area for the heat sink with different structure parameters,and the deviations of predictions from the numerical results are less than 10%.

关键词： hybrid heat sink impingement microchannel thermal management high heat flux

Assessment of damage to buildings and farms during the 2011 M 9.0 earthquake and tsunami in Japan from remote sensing data

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Chinese Science Bulletin 2011年第20期56卷 2138-2144页

作者： GUO HuaDong chen yu FENG Qiang lin QiZhong WANG Fei Center for Earth Observation and Digital Earth Chinese Academy of SciencesBeijing 100094China

At 13:46 on March 11,2011(Beijing time),a great earthquake of magnitude of 9.0 occurred off the Pacific coast of northeastern Japan(Tohoku Region).After the earthquake,the Center for Earth Observation and Digital Earth(CEODE),Chinese Academy of Sciences,quickly launched a major disaster emergency response to assess the *** this paper,we have extracted buildings and farms in the heavily devastated area that includes Iwate,Miyagi,and Fukushima Prefectures,based on multi-spectral remote sensing *** have assessed building damage by overlaying seismic intensity and building *** addition,we have assessed the extent of building and farm damage caused by the tsunami through the establishment of a tsunami impact assessment model that is based on terrain and distance from the *** results were partially verified by high-resolution images obtained after the *** results show that about 76% of buildings in Miyagi Prefecture were affected by seismic intensity 6 and above,with 24% of the buildings and 12% of the farms destroyed by the *** huge losses were echoes at lesser amounts in Fukushima and *** results provide the support of basic data,which can be further developed by economic and social aspects of the disaster assessment.

关键词：影响评估模型遥感数据建筑物大地震海啸农场数据损坏日本

Synthesis of Nitroanilines Catalyzed by Horseradish Peroxidase in the Presence of NaNO2 and H2O2

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Chemical Research in Chinese Universities 2013年第6期29卷 1164-1166页

作者： LIU Cong DAI Rong-ji lin Jie SUN Jian-hua chen Shi DENG yu-lin School of Life Science Beijing Institute of Technology Beijing 100081 P.R.China

The synthesis of nitroanilines catalyzed by horseradish peroxidase（HRP） in the presence of sodium nitrite and hydrogen peroxide was investigated, o-Nitroaniline and p-nitroaniline were found in the nitrated products. 2-Aminotoluene and 4-aminotoluene could also be nitrated to give corresponding nitrated products. This protocol has great potentials to open new avenues useful for the synthesis of nitroaniline and its derivatives.

关键词： Nitroaniline Horseradish peroxidase Phenylamine Nitration Enzyme

CeO_(2)/BiOBr/CNTs催化剂的制备及其降解抗生素性能研究

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现代化工 2024年第5期44卷 122-127,134页

作者：李友凤方程陈林羽唐彩霞吕国玲肖菡曦遵义师范学院化学化工学院贵州遵义563000

采用水热法合成了CeO_(2)、CeO_(2)/BiOBr、CeO_(2)/CNTs和CeO_(2)/BiOBr/CNTs复合纳米材料催化剂,利用XRD、SEM、BET和UV-Vis等方法对材料的结构、形貌和织构特性进行表征。在长弧氙灯照射下模拟太阳可见光降解抗生素,研究复合纳米材... 详细信息

采用水热法合成了CeO_(2)、CeO_(2)/BiOBr、CeO_(2)/CNTs和CeO_(2)/BiOBr/CNTs复合纳米材料催化剂,利用XRD、SEM、BET和UV-Vis等方法对材料的结构、形貌和织构特性进行表征。在长弧氙灯照射下模拟太阳可见光降解抗生素,研究复合纳米材料的光催化氧化性能。结果表明,CeO_(2)与BiOBr、CNTs间的协同作用导致其对土霉素降解效果优于CeO_(2);CeO_(2)/BiOBr/CNTs对抗生素和可见光具有更高的吸收性能,比CeO_(2)/BiOBr和CeO_(2)/CNTs有更高的降解效率。在弱碱性环境下生成活性基团·OH,复合材料催化效果较好。复合材料禁带宽度都在可见光范围内,CeO_(2)的复合提高了材料的光利用效率,增强了材料的吸附性和电子-空穴对的迁移效率,进而提高其光催化活性。回收脱附实验表明,CeO_(2)/BiOBr/CNTs复合材料具有较好的稳定性。

关键词： CeO_(2)/BiOBr/CNTS 复合纳米材料光催化降解抗生素催化剂机理

Atomically Dispersed Ruthenium Catalysts with Open Hollow Structure for Lithium-Oxygen Batteries

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Nano-Micro Letters 2024年第2期16卷 154-164页

作者： Xin chen yu Zhang Chang chen Huinan Li yuran lin Ke yu Caiyun Nan chen chen Beijing Advanced Innovation Center for Materials Genome Engineering Institute of Solid State ChemistryUniversity of Science and Technology BeijingBeijing 100083People’s Republic of China Engineering Research Center of Advanced Rare Earth Materials Department of ChemistryTsinghua UniversityBeijing 100084People’s Republic of China Beijing Key Laboratory of Energy Conversion and Storage Materials Institution College of ChemistryBeijing Normal UniversityBeijing 100875People’s Republic of China

Lithium–oxygen battery with ultrahigh theoretical energy density is considered a highly competitive next-generation energy storage device,but its practical application is severely hindered by issues such as difficult decomposition of discharge products at ***,we have developed N-doped carbon anchored atomically dispersed Ru sites cathode catalyst with open hollow structure(h-RuNC)for Lithium–oxygen *** one hand,the abundance of atomically dispersed Ru sites can effectively catalyze the formation and decomposition of discharge products,thereby greatly enhancing the redox *** the other hand,the open hollow structure not only enhances the mass activity of atomically dispersed Ru sites but also improves the diffusion efficiency of catalytic ***,the excellent activity from atomically dispersed Ru sites and the enhanced diffusion from open hollow structure respectively improve the redox kinetics and cycling stability,ultimately achieving a high-performance lithium–oxygen battery.

关键词： Atomically dispersed Open hollow structure Discharge product Lithium Oxygen battery