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Let’s Get Vaccinated for Both flu and COVID-19:On the World flu Day 2021

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China CDC weekly 2021年第44期3卷 915-917页

作者： George f.Gao William j.liu Chinese Center for Disease Control and Prevention BeijingChina.

This year marks the fourth World flu Day on November *** 2018,on the occasion of centenary of the 1918 flu pandemic,the first World flu Day was formally initiated and developed by leading influenza specialists in China and all over the world at a symposium in Shenzhen,China,with the theme to“Commemorate the Centenary of the 1918–19 Influenza Pandemic”(1).Scientists and representatives from different international associations and organizations.

关键词： formally initiated World

An Introduction to Advanced Hot-formed Steel for Automobile

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Acta Metallurgica Sinica(English Letters) 2014年第3期27卷 373-382页

作者： W.j.liu Research Academy Northeastern University

A recently developed advanced hot-formed （AHf） steel for automobile is introduced and three physical metallurgy concepts based on which the AHf steel was designed are reviewed, they are dynamic carbon partitioning （DCP）, flash copper precipitation and bake toughening. AHf steel is an upgrade of the existing hot-formed steel especially suitable for making components with superior crashworthiness; it can be processed by regular hot stamping equipment and process. A kinetics model for DCP is expressed in detail, which can be used to calculate the volume fraction of retained austenite based on four materials and processing parameters. The flash copper precipitation used as an additional strengthening mechanism for AHf steel is also discussed and its ultrafast kinetics can be attributed to the enhancement of quenched-in vacancies on copper diffusion. Also, the bake toughening of AHf steel is addressed; the mechanism of which may be related to the elimination of the less stable block-like retained austenite.

关键词： Advanced hot-formed (AHf) steel Dynamic carbon partitioning flash copper precipitation Bake toughening Hot stamping

Designing metallic glasses with optimal combinations of glass-forming ability and mechanical properties

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journal of Materials Science & Technology 2021年第8期67卷 254-264页

作者： S.j.Wu Z.Q.liu R.T.Qu Z.f.Zhang Laboratory of fatigue and fracture for Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaHefei 230026China

It is a long-standing challenge to search for metallic glasses(MGs)with optimal combinations of glassforming ability(GfA),strength and toughness in the vast compositional *** taking into account both recently developed ellipse criterion and temperature-based GfA criterion,here we established quantitative correlations among compositions,elastic constants,GfA and mechanical properties of MGs,which enable to predict the GfA,fracture strength and fracture surface simultaneously in advance once the compositions of MGs are *** data confirm the validity of this approach in ***,a strategy for designing MGs with optimal combinations of strength,toughness and GfA is proposed,which allows for high-throughput discovering glass formers with excellent mechanical properties.

关键词： Metallic glass Composition Elastic constant Mechanical property Glass-forming ability

Enhanced electrochemical CO_(2)reduction coupled with urea oxidation using bifunctional atomically dispersed CuNi catalysts

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Nano Research 2025年第1期18卷 208-216页

作者： Wenjie Wu Haoyang Zhou Ying liu Yifei Pan Qingqing Chen Yu Zhang junjie Mao Wenjie Ma Ping Yu Beijing National Laboratory for Molecular Sciences Key Laboratory of Analytical Chemistry for Living BiosystemsInstitute of ChemistryChinese Academy of Sciences(CAS)Beijing 100190China College of Chemistry and Materials Science Anhui Normal UniversityWuhu 241002China University of Chinese Academy of Sciences Beijing 100049China

The electrochemical conversion of carbon dioxide(CO_(2))into chemical fuels represents a promising approach for addressing global carbon balance ***,this process is hindered by the kinetic limitations of anodic reactions,usually the oxygen evolution reaction,resulting in less efficient production of high value-added ***,we report an integrated electrocatalytic system that couples CO_(2)reduction reaction(CO_(2)RR)with urea oxidation reaction(UOR)using a bifunctional electrocatalyst with atomically dispersed dual-metal CuNi sites anchored on bamboo-like nitrogen-doped carbon nanotubes(CuNi-CNT),which were synthesized through a one-step pyrolysis *** bifunctional CuNi-CNT catalyst exhibits a near 100%CO faraday efficiency for CO_(2)RR over a wide potential range and outstanding UOR performance with a negatively shifted potential of 210 mV at 10 mA·cm^(-2).In addition,we assemble a two-electrode electrolyzer using bifunctional CuNi-CNT-modified carbon fiber paper electrodes as both cathode and anode,capable of operating at a remarkably low cell voltage of 1.81 V at 10 mA·cm-2,significantly lower than conventional *** study provides a novel avenue to achieving an efficient carbon cycle with reduced electric power consumption.

关键词： electrochemical conversion bimetallic site catalyst bifunctional electrocatalyst carbon dioxide reduction urea oxidation

fabrication of carbon-supported Al2O3 nanoparticles via spontaneous cross-linking to enhance selective hydrogenation of furfural

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journal of Energy Chemistry 2025年第1期100卷 612-620页

作者： Weiwei Yu Xinbao Zhang Hongyu Chen Yanan Wang Shaoguo Li fucun Chen Zhenni liu Xiujie Li Xiangxue Zhu State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences

Selective hydrogenation of furfural to furfuryl alcohol is a great challenge in the hydrogenation field due to thermodynamic preference for hydrogenation of C=C over C=***,a novel Al2O3/C-u hybrid catalyst,composed of N-modified dendritic carbon networks supporting Al2O3nanoparticles,was successfully prepared via carbonizing the freeze-dried gel from spontaneous cross-linking of alginate,Al3+and *** obtained carbon-supported Al2O3hybrid catalyst has a high ratio （31%） of Al species in pentahedral-coordinated *** introduction of urea enhances the surface N content,the ratio of pyrrolic N,and specific surface area of catalyst,leading to improved adsorption capacity of C=O and the accessibility of active *** the furfural hydrogenation reaction with isopropyl alcohol as hydrogen donor,Al2O3/C-u catalyst achieved a 90%conversion of furfural with 98.0% selectivity to furfuryl alcohol,outperforming that of commercial γ-***,Al2O3/C-u demonstrates excellent catalytic stability in the recycling tests attributed to the synergistic effect of abundant weak Lewis acid sites and the anchoring effect of the carbon network on *** work provides an innovative and facile strategy for fabrication of carbon-supported Al2O3hybrid catalysts with rich AlVspecies,serving as a high selective hydrogenation catalyst through MPV reaction route.

关键词： Selective hydrogenation furfural furfuryl alcohol Cross-linking MPV route

Towards High-Dimensional Entanglement in Path:Photon-Source Produced from a Two-Dimensional Atomic Cloud

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Chinese Physics Letters 2021年第8期38卷 38-42页

作者： Shaoxing liu Xuanying Lai Ce Yang j.f.Chen State Key Laboratory of Precision Spectroscopy School of Physics and Electronic ScienceEast China Normal UniversityShanghai 200241China Shenzhen Institute for Quantum Science and Engineering and Department of Physics Southern University of Science and TechnologyShenzhen 518055China

A photon source with high-dimensional entanglement is able to bring increasing capacity of information in quantum *** dimensionality is determined by the chosen degree of freedom of the photons and is limited by the complexity of the physical *** we propose a new type of high-dimensional entangled photon source,generated via path-indistinguishable scheme from a two-dimensional atomic cloud,which is prepared in a magneto-optical *** verify the photon source,we demonstrate experimentally the quantum state of the single photons heralded by its partner photon,with homodyne tomographic technology.

关键词： quantum verify dimensionality

脂质转移蛋白SiLTP1基因参与谷子耐盐响应初探

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作物学报 2025年第1期51卷 58-67页

作者：孟凡花刘敏沈傲刘炜山东省农业科学院农作物种质资源研究所山东济南250100 上海应用技术大学生态技术与工程学院上海201418

土壤盐渍化严重制约农业生产发展,通过提高植物耐盐性进行盐碱地综合利用,对于保障粮食安全,提升农业生产效率具有重要意义。脂质转移蛋白是一类在高等植物中广泛存在的小分子蛋白质,能够参与植株生长、信号转导以及多种生物和非生物胁... 详细信息

土壤盐渍化严重制约农业生产发展,通过提高植物耐盐性进行盐碱地综合利用,对于保障粮食安全,提升农业生产效率具有重要意义。脂质转移蛋白是一类在高等植物中广泛存在的小分子蛋白质,能够参与植株生长、信号转导以及多种生物和非生物胁迫过程。前期本课题组克隆到一个谷子中编码脂质转移蛋白的基因SiLTP1,本研究通过构建其原核表达载体和植物双元过表达载体,获得了该基因的原核表达蛋白及同源转化过表达阳性植株,经进一步筛选获得4个纯合株系。体外耐盐性试验显示, SiLTP1的原核表达蛋白具有一定耐盐性;转基因植株苗期耐盐生理指标测定显示,SiLTP1过表达植株在遭受盐胁迫时,植株体内MDA积累减少,抗氧化酶含量升高,可积累更少的过氧化氢,从而降低胁迫对植株的氧化损伤,显示基因过表达植株具有更好的耐盐性。本研究结果初步揭示, SiLTP1可正向调控谷子的耐盐性,其在谷子耐盐抗逆方面具有潜在功能,为耐盐谷子品种改良及新品种培育提供了理论基础和候选基因资源。

关键词：脂质转移蛋白 SiLTP1 盐胁迫谷子耐盐响应

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A practical model for efficient anti-fatigue design and selection of metallic materials:Ⅰ.Model building and fatigue strength prediction

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journal of Materials Science & Technology 2021年第11期70卷 233-249页

作者： R.liu P.Zhang Z.j.Zhang B.Wang Z.f.Zhang Laboratory of fatigue and fracture for Materials Shi-changxu Innovation Center for Advanced MaterialsInstitute of Metal ResearchChinese Academy of Sciences72 Wenhua RoadShenyang 110016China

The high cost and low efficiency of fatigue tests are bottleneck problem for the anti-fatigue design of metallic *** this problem,a theoretical fatigue model is proposed in this study,the possible applications have also been *** results would be introduced in two serial papers,in which the first paper focuses on the model building and the applications on fatigue strength prediction;the second paper put emphasis on the influencing factors of the model parameters and the applications on fatigue strength *** this first paper,a theoretical model is proposed considering both the strength and plastic restrictions of fatigue *** the model builds up a brief relationship among yield strength(Y),tensile strength(T)and fatigue strength(f),it is named as the Y-T-f *** the verification with fatigue strength data covering various kinds of metallic materials and loading conditions,this Y-T-f model exhibits both generality and *** the Y-T-f model,the efficient fatigue strength prediction could be conducted by brief linear fitting and calculation,just through yield strength,tensile strength and several known fatigue strength ***,through its deduced Y-f model,the analytical formula of fatigue strength continuously changing with materials strengthening can be obtained,as well as the maximum value of fatigue strength and corresponding critical yield *** summary,the Y-T-f model would be useful for reducing the fatigue tests,thus providing new possibilities on the efficient anti-fatigue design and selection of metallic materials.

关键词： Yield strength Tensile strength Plasticity fatigue strength Anti-fatigue design

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MICROSTRUCTURE ANALYSIS AND MECHANICAL PROPERTIES Of Zn-Al ALLOY ROD PRODUCED BY HEATED MOLD CONTINUOUS CASTING

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Acta Metallurgica Sinica(English Letters) 2003年第3期16卷 241-248页

作者： Y.Ma Y.Hao f.Y.Yan H.j.liu State Key Laboratory of Advanced Nonferrous Materials Lanzhou University of Science & Technology Lanzhou 730050 ChinaState Key Laboratory of Advanced Nonferrous Materials Lanzhou University of Science & Technology Lanzhou 730050 ChinaState Key Laboratory of Advanced Nonferrous Materials Lanzhou University of Science & Technology Lanzhou 730050 ChinaSchool of Mechano-Electronic EngineeringHua Qian University Quanzhou 362011China

The new technology of continuous casting by heated mold was used to produce directional solidification ZA alloy lines to eliminate the inter defects of these lines and increase their mechanical properties. The results are as follows: (1) The microstruc-ture of the ZA alloy lines is the parallel directional dendritic columnar crystal. Every dendritic crystal of eutectic alloy ZA5 was composed of many layer eutectic β and η phases. The micro structure of hypereutectic ZA alloys is primary dendritic crystal and interdendritic eutectic structure. The primary phase of ZA8 and ZA12 is β, among them, but the primary phase of ZA22 and ZA27 is a. (2) Through the test to the as-cast ZA alloy lines made in continuous casting by heated mold, it is found that the tensile strength and hardness increase greatly, but the elongation decreases. With the increase of aluminum amount from ZA 5 to ZA 12, ZA22 and ZA27, the tensile strength increases gradually. ZA27 has the best comprehensive mechanical properties in these four kinds of ZA alloys. (3) Heat treatment can decrease the dendritic segregation and improve the elongation of ZA alloy, but make their strength decrease slightly.

关键词： zinc-aluminum alloy heated mold continuous casting mechanical properties heat treatment