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超疏水铝导线防覆冰机理研究

中国电机工程学报 2017年第S1期37卷 204-210页

作者：金海云聂诗超仝程李志伟卫世超高乃奎电力设备电气绝缘国家重点实验室(西安交通大学) 陕西省西安市710049

近年来,超疏水表面在电力系统防覆冰方面的应用受到了广泛关注,为了对超疏水铝导线的防覆冰机理和防覆冰效果进行研究,制备了超疏水铝导线和普通铝导线,利用实验室搭建的覆冰实验平台对其覆冰过程进行了记录和分析。研究结果表明液滴在... 详细信息

近年来,超疏水表面在电力系统防覆冰方面的应用受到了广泛关注,为了对超疏水铝导线的防覆冰机理和防覆冰效果进行研究,制备了超疏水铝导线和普通铝导线,利用实验室搭建的覆冰实验平台对其覆冰过程进行了记录和分析。研究结果表明液滴在超疏水铝导线表面汇聚后可能发生自跳跃现象,使用界面自由能理论并结合能量守恒的观点对此进行了分析,认为液滴自跳跃过程有利于液滴滚落,延缓覆冰。此外,还对单个液滴在两种铝导线表面的结冰过程进行了研究,发现液滴在超疏水铝导线表面特殊的接触状态延缓了液滴在其表面的结冰时间,并且这种延缓效果主要体现在液滴发生相变之前。液滴在超疏水铝导线表面直接滚落,自跳跃滚落以及缓慢结冰使得超疏水铝导线在-5℃时拥有良好的防覆冰效果,实验结果对超疏水铝导线防覆冰理论的发展具有重要作用。

关键词：超疏水铝导线自跳跃结冰过程防覆冰

Integer Programming Problem Based on Plasmid DNA Computing Model

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Chinese Journal of Electronics 2017年第6期26卷 1284-1288页

作者： YIN Zhixiang CUI Jianzhong yang Jing School of Mathematics and Big Data Anhui University of Science and Technology Huainan Union University

A DNA algorithm by operating on plasmids was presented to solve a special integer programming, a typical hard computing problem. The DNA algorithm employed double-stranded molecules to encode variables of 0-1 programming problem, the encoded DNA molecules were inserted into circular plasmids as foreign DNA molecules. Followed by, a series of enzymatic treatments to plasmids were performed in order to find feasible solutions to the given problem. The final optimum was obtained by applying founded feasible solutions to object function. Compared with other DNA algorithms of integer programming problem, the proposed algorithm is simple, error-resistant, above all, feasible. Our work clearly showed the distinct advantages of plasmid DNA computing model when solving integer related programming problem.

关键词： DNA computing 0-1 programming Plasmid

Magneto-impedance effect in soft Fe-based nanocrystalline alloys

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Chinese Science Bulletin 1997年第3期42卷 196-199页

作者： yang, JX yang, XL Chen, GO Hu, BY Shen, GT Jiang, KY Physics Department East China Normal University Shanghai China

IN recent years, giant magneto-resistance (GMR) effects have been observed in some binary composite systems such as multi-layered and granular films of Fe, Co, Ni and Cr, Ag, Cu and attracted considerable interest due to their potential applications in magnetic recording heads and field sensors. However, a notable GMR effect in these films always requires a strong external magnetic field at low temperature. More recently, Mohri et al. have discovered

关键词： Fe-based nanocrystalline giant magneto-impedance effect transverse magnetic field annealing.

Genetic and histological relationship between pheromone-secreting tissues of the musk gland and skin of juvenile Chinese forest musk deer(Moschus berezovskii Flerov,1929)

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2023年第9期24卷 807-822页

作者： Long LI Heran CAO Jinmeng yang Tianqi JIN Yuxuan MA yang WANG Zhenpeng LI Yining CHEN Huihui GAO Chao ZHU Tianhao yang Yalong DENG Fangxia yang Wuzi DONG College of Animal Science and Technology Northwest A&F UniversityYangling712100China College of Forestry Northwest A&F UniversityYangling712100China Biology Research Centre of Qin Mountains Wildlife Northwest A&F UniversityYangling712100China

Background The musk glands of adult male Chinese forest musk deer(Moschus berezovskii Flerov,1929)(FMD),which are considered as special skin glands,secrete a mixture of sebum,lipids,and proteins into the musk ***,these components form musk,which plays an important role in attracting females during the breeding ***,the relationship between the musk glands and skin of Chinese FMD remains ***,the musk gland and skin of Chinese FMD were examined using histological analysis and RNA sequencing(RNA-seq),and the expression of key regulatory genes was evaluated to determine whether the musk gland is derived from the *** A comparative analysis of musk gland anatomy between juvenile and adult Chinese FMD was ***,based on the anatomical structure of the musk gland,skin tissues from the abdomen and back as well as musk gland tissues were obtained from three juvenile *** tissues were used for RNA-seq,hematoxylin-eosin(HE)staining,immunohistochemistry(IHC),western blot(WB),and quantitative real-time polymerase chain reaction(qRT-PCR)*** Anatomical analysis showed that only adult male FMD had a complete glandular organ and musk pod,while juvenile FMD did not have any well-developed musk *** data revealed that 88.24%of genes were co-expressed in the skin and musk gland *** Encyclopedia of Genes and Genomes(KEGG)signaling pathway analysis found that the genes co-expressed in the abdomen skin,back skin,and musk gland were enriched in biological development,endocrine system,lipid metabolism,and other *** Ontology(GO)enrichment analysis indicated that the genes expressed in these tissues were enriched in biological processes such as multicellular development and cell ***,the Metascape predictive analysis tool demonstrated that genes expressed in musk glands were skin ***-PCR and WB revealed that sex-determining region Y-box protein 9(Sox9),Caveoli

关键词： Forest musk deer Pheromones Musk gland Skin tissues Transcriptome Sebaceous gland

Lattice Boltzmann Simulation of Convection in a Porous Medium with Temperature Jump and Velocity Slip Boundary Conditions

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Communications in Theoretical Physics 2008年第5期49卷 1319-1322页

作者： XU You-Sheng LIU yang yang Xiao-Feng WU Feng-Min Department of Physics Zhejiang Normal University Jinhua 321004 China Department of Mechanically Engineering The Hong Kong Polytechnic University Kowloon Hong Kong China Department of Computer Engineering Yiwu Industrial and Commercial College Yiwu 322000 China

To investigate the convection in a porous medium, a horizontal quiescent layer of one fluid saturating a porous medium heated from bottom is numerically studied using single lattice-Boltzmann method （LBM） and the generalized Navier Stokes equation proposed by Nithiarasu et al. [P. Nithiarasu, K.M. Seetharamu, and T Sundararajan Int. J. Heat Mass Trans. 40 （1997） 3955]. Due to the rarefaction, the boundary conditions are considered as both temperature jump and velocity slip. The computational results are vahdated against the analytical results, and excellent agreement has been obtained. The results have shown that the Rayleigh number is increased with increasing temperature jump, the stabilization effect of temperature is much more significant than that of velocity slip, and the computation stability of present model is better than that of Darey and Brinkman models.

关键词： convection in porous medium lattice Boltzmann method boundary condition

Copper-catalyzed C(sp)-H aryl amination enables modular synthesis of quinolines and 2-quinolinones

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Science China Chemistry 2024年第2期67卷 595-603页

作者： yang Gao Haixia Li Simin yang Yanping Huo Qian Chen Xianwei Li Zhe Wang Xiao-Qiang Hu School of Chemical Engineering and Light Industry Guangdong University of TechnologyGuangzhou510006China Jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory Jieyang515200China Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education&Hubei Key Laboratory of Catalysis and Materials Science School of Chemistry and Materials ScienceSouth-Central University for NationalitiesWuhan430074China

Herein,we disclose a novel copper-catalyzed C(sp)-H aryl amination of terminal alkynes with anthranils,enabling the rapid generation of highly reactive secondary N-aryl ynamines for the modular synthesis of structurally diverse C2-substituted quinolines and *** in-situ formed carbonyl-ynamines are prone to tautomerize to carbonyl-ketenimines,which can efficiently react with a series of nucleophiles,including amines,alcohols,phenols,thiols,thiophenols,active-methylene compounds,and even water to produce various quinoline derivatives with the generation of H_(2)O as a sole and green *** method also unlocks a practical route to create various quinoline-fused heterocycles and can be successfully applied to the late-stage modification of complex molecules and the concise synthesis of bioactive *** studies reveal a coppercatalyzed inner-sphere nitrene transfer process by using anthranils as novel aryl nitrene precursors.

关键词： copper catalysis anthranils C(sp)-H aryl amination carbonyl-ketenimines quinolines

Two-proton radioactivity of the excited state within the Gamow-like and modified Gamow-like models

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Nuclear Science and Techniques 2022年第10期33卷 1-10页

作者： De-Xing Zhu yang-yang Xu Hong-Ming Liu Xi-Jun Wu Biao He Xiao-Hua Li School of Nuclear Science and Technology University of South ChinaHengyang 421001China Institute of Modern Physics Fudan UniversityShanghai 200433China School of Math and Physics University of South ChinaHengyang 421001China College of Physics and Electronics Central South UniversityChangsha 410083China National Exemplary Base for International Sci&Tech.Collaboration of Nuclear Energy and Nuclear Safety University of South ChinaHengyang 421001China Cooperative Innovation Center for Nuclear Fuel Cycle Technology&Equipment University of South ChinaHengyang 421001China Key Laboratory of Low Dimensional Quantum Structures and Quantum Control Hunan Normal UniversityChangsha 410081China

In this study,we systematically investigated the two-proton(2p)radioactivity half-lives from the excited state of nuclei near the proton drip line within the Gamowlike model(GLM)and modified Gamow-like model(MGLM).The calculated results were highly consistent with the theoretical values obtained using the unified fission model[***.C 45,124105(2021)],effective liquid drop model,and generalized liquid drop model[Acta *** 71,062301(2022)].Furthermore,utilizing the GLM and MGLM,we predicted the 2p radioactivity halflives from the excited state for some nuclei that are not yet available ***,by analyzing the calculated results from these theoretical models,it was found that the half-lives are strongly dependent on Qand l.

关键词： 2p radioactivity Gamow-like model Halflife Excited state

MICROSTRUCTURE OF ELECTRODEPOSITED Ni-W-P-SiC COMPOSITE COATINGS

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中国有色金属学会会刊：英文版 1997年第1期7卷 23-27页

作者： Guo, Zhongcheng yang, Xianwan Liu, Hongkang Kunming Univ of Science & Technology Kunming China

ＭＩＣＲＯＳＴＲＵＣＴＵＲＥＯＦＥＬＥＣＴＲＯＤＥＰＯＳＩＴＥＤＮｉＷＰＳｉＣＣＯＭＰＯＳＩＴＥＣＯＡＴＩＮＧＳ①ＧｕｏＺｈｏｎｇｃｈｅｎｇ，ＹａｎｇＸｉａｎｗａｎ，ＬｉｕＨｏｎｇｋａｎｇＤｅｐａｒｔｍｅｎｔｏ... 详细信息

ＭＩＣＲＯＳＴＲＵＣＴＵＲＥＯＦＥＬＥＣＴＲＯＤＥＰＯＳＩＴＥＤＮｉＷＰＳｉＣＣＯＭＰＯＳＩＴＥＣＯＡＴＩＮＧＳ①ＧｕｏＺｈｏｎｇｃｈｅｎｇ，ＹａｎｇＸｉａｎｗａｎ，ＬｉｕＨｏｎｇｋａｎｇＤｅｐａｒｔｍｅｎｔｏｆＭｅｔａｌｕｒｇｙ，Ｋｕｎｍｉｎ...

关键词： electrodeposition Ni W P SiC composite coatings microstructure

Optimized Vertical Layers for the Hybrid Terrain-Following Coordinate Minimizing Numerical Errors in a 2D Rising Bubble Experiment near Steep Terrain

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Journal of Meteorological Research 2023年第6期37卷 896-907页

作者： Hao yang Yiyuan LI Bin WANG State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing100029China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing100049China

The basic terrain-following(BTF)coordinate simplifies the lower boundary conditions of a numerical model but leads to numerical error and instability on steep *** terrain-following(HTF)coordinates with smooth slopes of vertical layers(slopeVL)generally overcome this ***,the HTF coordinate becomes very desirable for atmospheric and oceanic numerical ***,improper vertical layering in HTF coordinates may also increase the incidence of *** for the slopeVL of an HTF coordinate,this study further optimizes the HTF coordinate focusing on the thickness of vertical layers(thickVL).Four HTF coordinates(HTF1–HTF4)with similar slopeVL but different vertical transition methods of thickVL are designed,and the relationship between thickVL and numerical errors in each coordinate is compared in the classic idealized thermal convection[two-dimensional(2D)rising bubble]experiment over steep *** errors of potential temperatureθand vertical velocity w are reduced most,by approximately 70%and 40%,respectively,in the HTF1 coordinate,with a monotonic increase in thickVL according to the increasing height;however,the errors ofθincreased in all the other HTF coordinates,with nonmonotonic ***,analyses of the errors of vertical pressure gradient force(VPGF)show that due to the interpolation errors of thickVL,the inflection points in the vertical transition of thickVL induce the initial VPGF errors;therefore,the HTF1 coordinate with a monotonic increase in thickVL has the smallest errors among all the *** importantly,the temporal evolution of VPGF errors manifests top-type VPGF errors that propagate upward gradually during the time *** the HTF1 and HTF4 coordinates with a monotonic increase in thickVL near the top of the terrain can suppress this *** optimized HTF coordinate(i.e.,HTF1)can be a reference for designing a vertical thickVL in a numerical model.

关键词： hybrid terrain-following coordinate thickness of vertical layer numerical error pressure gradient force two-dimensional(2D)rising bubble experiment steep terrain