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| 1 | Boundary Layer Distributions and Cooling Rate of Cooling Sloping Plate Process显示文摘According to the principle of grain refining and slurry preparation by cooling sloping plate process, the distributions of boundary layers during melt treatment by cooling sloping plate were studied, and mathematic model of cooling rate was established. The calculation value approximately agrees with the experimental result. Laminar flow and turbulent flow exist on sloping plate surface commonly. The thickness of velocity boundary layer and the critical transfer distance from laminar flow to turbulent flow increase with the decrease of initial flow velocity. The thickness of temperature boundary layer increases with the increment of flow distance and the decrease of initial flow velocity. The melt cooling rate and melt thickness have an inverse proportion relationship. The melt cooling rate increases along the plate direction gradually when the initial flow velocity is lower than 1 m/s, the melt cooling rate keeps nearly a constant when the initial flow velocity is 1 m/s, when the initial flow velocity is higher than 1 m/s, the melt cooling rate decreases gradually. The melt cooling rate of cooling sloping plate process can reach 102-103 K/s and belongs to meta-rapid solidification scope. | 赵占勇 管仁国 WANG Xiang HUANG Hongqian CHAO Runze DONG Lei LIU Chunming | 2013 | Journal of Wuhan University of Technology(Materials Science)2013，28，4： | 1 |
| 2 | Heat transfer and grain refining mechanism during melt treatment by cooling sloping plate显示文摘Heat transfer of flow melt and grain refining mechanism during melt treatment by the cooling sloping plate were investigated.The results show that the cooling sloping plate can refine not only grains of alloys but also can obviously refine pure metal.Cooling ability of the plate is the key factor that induces grain refining,the plate material and the flow amount can affect cooling rate of the melt and thus affect refining effectiveness.The cooling rate of the melt on the cooling sloping plate is much faster than that of the conventional casting process,which can reach 1000 K/s and belongs to meta-rapid solidification scope.The thickness of the temperature boundary layer is much larger than that of the velocity boundary layer on the sloping plate,but the temperature gradient is small in the temperature boundary layer.Under strong cooling action by the cooling plate,most parts of the melt on the plate surface can form undercooling,which causes continuous eruptive nucleation,this is the main grain refining mechanism,and the heterogeneous nucleation on the plate surface is a helpful supplement for the nucleation. | Renguo GUAN Zhanyong ZHAO Runze CHAO Hongqian HUANG Chunming LIU | 2012 | Acta Metallurgica Sinica(English Letters)2012，25，4： | 1 |
| 3 | Constructing CdSe QDs modified porous g-C_(3)N_(4)heterostructures for visible light photocatalytic hydrogen production显示文摘Constructing heterostructures with narrow-band-gap semiconductors is a promising strategy to extend light absorption range of graphitic carbon nitride(g-C_(3)N_(4))and simultaneously promote charge separation for its photocatalytic activity improvement.However,its highly localized electronic states of g-C_(3)N_(4)hinder photo-carrier migration through bulk towards heterostructure interfaces,resulting in low charge carrier separation efficiency of solid bulk g-C_(3)N_(4)-based heterostructures.Herein,porous g-C_(3)N_(4)(PCN)material with greatly shortened migration distance of photo-carriers from bulk to surface was used as an effective substrate to host Cd Se quantum dots to construct type II heterostructure of Cd Se/PCN for photocatalytic hydrogen production.The homogeneous modification of the Cd Se quantum dots throughout the whole bulk of PCN together with proper band alignments between Cd Se and PCN enables the effective separation of photo-generated charge carriers in the heterostructure.Consequently,the Cd Se/PCN heterostructure photocatalyst gives the greatly enhanced photocatalytic hydrogen production activity of192.3μmol h^(-1),which is 4.4 and 8.1 times that of Cd Se and PCN,respectively.This work provides a feasible strategy to construct carbon nitride-based heterostructure photocatalysts for boosting visible light driven water splitting performance. | Zheng Zhang Yuyang Kang Li-Chang Yin Ping Niu Chao Zhen Runze Chen Xiangdong Kang Fayu Wu Gang Liu | 2021 | Journal of Materials Science & Technology2021，，36： | 0 |
| 4 | Dynamic human retinal pigment epithelium(RPE)and choroid architecture based on single-cell transcriptomic landscape analysis显示文摘The retinal pigment epithelium(RPE)and choroid are located behind the human retina and have multiple functions in the human visual system.Knowledge of the RPE and choroid cells and their gene expression profiles are fundamental for understanding retinal disease mechanisms and therapeutic strategies.Here,we sequenced the RNA of about 0.3 million single cells from human RPE and choroids across two regions and seven ages,revealing regional and age differences within the human RPE and choroid.Cell–cell interactions highlight the broad connectivity networks between the RPE and different choroid cell types.Moreover,the transcription factors and their target genes change during aging.The coding of somatic variations increases during aging in the human RPE and choroid at the single-cell level.Moreover,we identified ELN as a candidate for improving RPE degeneration and choroidal structure during aging.The mapping of the molecular architecture of the human RPE and choroid improves our understanding of the human vision support system and offers potential insights into the intervention targets for retinal diseases. | Lulin Huang Lin Ye Runze Li Shanshan Zhang Chao Qu Shujin Li Jie Li Mu Yang Biao Wu Ran Chen Guo Huang Bo Gong Zheng Li Hongjie Yang Man Yu Yi Shi Changguan Wang Wei Chen Zhenglin Yang | 2023 | Genes & Diseases2023，10，6： | 0 |
| 5 | Deep Sc-RNA sequencing decoding the molecular dynamic architecture of the human retina显示文摘The human retina serves as a light detector and signals transmission tissue.Advanced insights into retinal disease mechanisms and therapeutic strategies require a deep understanding of healthy retina molecular events.Here,we sequenced the m RNA of over 0.6 million single cells from human retinas across six regions at nine different ages.Sixty cell sub-types have been identified from the human mature retinas with unique markers.We revealed regional and age differences of gene expression profiles within the human retina.Cell-cell interaction analysis indicated a rich synaptic connection within the retinal cells.Gene expression regulon analysis revealed the specific expression of transcription factors and their regulated genes in human retina cell types.Some of the gene’s expression,such as DKK3,are elevated in aged retinas.A further functional investigation suggested that over expression of DKK3 could impact mitochondrial stability.Overall,decoding the molecular dynamic architecture of the human retina improves our understanding of the vision system. | Lulin Huang Runze Li Lin Ye Shanshan Zhang Huaping Tian Mingyan Du Chao Qu Shujin Li Jie Li Mu Yang Biao Wu Ran Chen Guo Huang Ling Zhong Hongjie Yang Man Yu Yi Shi Changguan Wang Houbin Zhang Wei Chen Zhenglin Yang | 2023 | Science China(Life Sciences)2023，66，3： | 0 |
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