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Advances in Mg-Al-layered double hydroxide steam coatings on Mg alloys:A review

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Journal of Magnesium and Alloys 2023年第5期11卷 1505-1518页

作者： shi-Qi Pan Fen zhang Cuie Wen rong-Chang Zeng Corrosion Laboratory for Light Metals College of Materials Science and EngineeringShandong University of Science and TechnologyQingdao 266590China School of Engineering RMIT UniversityMelbourneVictoria3001Australia School of Materials Science and Engineering Zhengzhou UniversityZhengzhou450002China

Layered double hydroxide(LDH)coatings on magnesium(Mg)alloys shine brightly in the field of corrosion protection because of their special ion-exchange ***-of-the-art steam coating as a type of LDH film preparation technique has emerged in recent years because only pure water is required as the steam source and its environmentally friendly LDH coating fits the current need for green ***,this coating can effectively inhibit the corrosion of the Mg alloy substrate due to the chemical bonding between the coating and the Mg alloy *** review systematically explains cutting-edge advancements in the growth mechanism and corrosion behavior of LDH steam coatings,and analyzes the advantages and limitations of the steam-coating *** influencing factors including pressure,CO_(2)/CO_(3)^(2-),aluminum content of the substrate alloy,solution type,and acid-pickling pretreatment,as well as the post-treatment of steam-coating defects,are comprehensively elucidated,providing new insights into the development of the in situ steam-coating ***,existing issues and future prospects are discussed to further accelerate the widespread application of Mg alloys.

关键词： Corrosion Layered double hydroxide(LDH) Mg alloy Steam coating Surface modification

Nearly nonstationary processes under infinite variance GARCH noises

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Applied Mathematics(A Journal of Chinese Universities) 2022年第2期37卷 246-257页

作者： zhang rong-mao LIU Qi-meng shi Jian-hua School of Mathematics and Statistics Minnan Normal UniversityZhangzhou 363000China School of Mathematical Science Zhejiang UniversityHangzhou 310027China

Let Y_(t) be an autoregressive process with order one,i.e.,Y_(t)=μ+ϕnY_(t-1)+εt,where fεtg is a heavy tailed general GARCH noise with tail indexα.Letϕn be the least squares estimator(LSE)ofϕ***μ=0 andαzhang and Ling(2015)thatϕn is inconsistent when Y_(t) is stationary(i.e.,ϕn.,ϕzhang(2010)showed thatϕn is still consistent with convergence rate n when Y_(t) is a unit-root process(i.e.,ϕn=1)and fεtg is a GARCH(1,1)*** is a gap between the stationary and nonstationary *** this paper,two important issues will be considered:(1)what about the nearly unit root case?(2)When canϕbe estimated consistently by the LSE?We show that whenϕn=1-c/n,then bϕn converges to a functional of stable process with convergence rate ***,we show that if limn!1 kn(1-ϕn)=c for a positive constant c,then kn(ϕn-ϕ)converges to a functional of two stable variables with tail indexα/2,which means thatϕn can be estimated consistently only when kn!1.

关键词： GARCH noises heavy-tailed stable processes and unit-root

Dielectric-ion-conductive ZnNb2O6 layer enabling rapid desolvation and diffusion for dendrite-free Zn metal batteries

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Journal of Energy Chemistry 2025年第1期100卷 693-701页

作者： Haifeng Yang Jian Wang Panpan zhang Xiaomin Cheng Qinghua Guan Jing Dong Bixian Chen Lujie Jia Jing zhang Yongzheng zhang Yunjian Liu Hongzhen Lin School of Materials Science and Engineering Jiangsu University i-Lab & CAS Key Laboratory of Nanophotonic Materials and Devices Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences Helmholtz Institute Ulm (HIU) Karlsruhe Institute of Technology (KIT) School of Materials Science and Engineering Xi'an University of Technology State Key Laboratory of Chemical Engineering East China University of Science and Technology

Rechargeable aqueous zinc-metal batteries （AZMBs） are promising candidates for large-scale energy storage systems due to their low cost and high ***,their performance and sustainability are significantly hindered by the sluggish desolvation kinetics at the electrode/electrolyte interface and the corresponding hydrogen evolution reaction where active water molecules tightly participate in the Zn（H2O）62+solvation ***,learnt from self-generated solid electrolyte interphase （SEI） in anodes,the dielectric but ion-conductive zinc niobate nanoparticles artificial layer is constructed on metallic Zn surface （ZNB@Zn）,acting as a rapid desolvation *** zincophilic and dielectric-conductive properties of ZNB layer accelerate interfacial desolvation/diffusion and suppress surface corrosion or dendrite formation,achieving uniform Zn plating/stripping behavior,as confirmed by electronic/optical microscopies and interface spectroscopical measurements together with theoretical ***,the as-prepared ZNB@Zn electrode exhibits excellent cycling stability of over 2000 h and robust reversibility （99.54%） even under high current density and depth of discharge ***,the assembled ZNB@Zn-based full cell displays high capacity-retention rate of 80.21%after 3000 cycles at 5 A g-1and outstanding rate performance up to 10 A *** large-areal pouch cell is stabilized for hundreds of cycles,highlighting the bright prospects of the dielectric but ion-conductive layer in further application of AZMBs.

关键词： Zn metal battery Dielectric artificial layer Rapid ion diffusion Zincophilic diffusion Active water inhibition

血清骨标志物与2型糖尿病患者心血管疾病风险的关系

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中国现代医学杂志 2020年第10期30卷 22-26页

作者：庄兰艮葛晓旭杨青青史菲菲张士荣严鸣蚌埠医学院第一附属医院内分泌科安徽蚌埠233000 上海交通大学附属同仁医院内分泌科上海200336

目的评估2型糖尿病(T2DM)患者中6种骨标志物(骨钙蛋白、骨桥蛋白、骨粘连蛋白、骨保护素、碱性磷酸酶和骨硬化蛋白)水平是否与心血管疾病(CVD)风险相关。方法选取2015年9月-2018年12月蚌埠医学院第一附属医院收治的T2DM患者200例,其中10... 详细信息

目的评估2型糖尿病(T2DM)患者中6种骨标志物(骨钙蛋白、骨桥蛋白、骨粘连蛋白、骨保护素、碱性磷酸酶和骨硬化蛋白)水平是否与心血管疾病(CVD)风险相关。方法选取2015年9月-2018年12月蚌埠医学院第一附属医院收治的T2DM患者200例,其中100例在2年的随访过程中出现了CVD。根据随访期间是否发生CVD分为CVD组和无CVD组,每组100例。用多重试剂盒法测量血清中6种骨标志物,使用多因素Logistic回归分析评估骨标志物与CVD风险的关系。结果CVD组年龄、糖尿病病程、骨钙蛋白、骨桥蛋白、骨粘连蛋白、骨保护素、碱性磷酸酶、骨硬化蛋白水平较无CVD组高(P<0.05)。多因素Logistic回归分析结果显示,较高血浆浓度的骨桥蛋白水平[OR^^=5.112(95%CI:1.032,22.423),P=0.000]是T2DM患者发生CVD的危险因素。结论高骨桥蛋白是T2DM患者CVD风险的独立危险因素,而其他5种骨标志物和CVD风险无关。

关键词：糖尿病/糖尿病,2型心血管疾病骨桥蛋白质碱性磷酸酶危险因素

Self-assembly of Polyaniline： Mechanism Study

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Chinese Journal of Chemical Physics 2008年第2期21卷 187-192页

作者： shi-yan Song Li-jia Pan Yun Li Yi shi Lin Pu rong zhang You-dou Zheng National Laboratory of Solid State Microstructures Nanjing Department of Physics Nanjing University Nanjing 210093 China

Anisotropic polyaniline （PAni） plates decorated with self-aligned nanofiber arrays were synthesized under the hydrothermaI conditions. The formation mechanism of the self-assembled structures was investigated by studying the effect on PAni micro-structure with additive electrolyte in reaction system, and numerical simulation for dependence of systematic electrostatic energy on cross angles of self-assembled nanofiber arrays in grid textured PAni plates. It is proposed that the electrostatic interaction based on ionic doping charges plays an important role in the formation of the self-assembled PAni structures.

关键词： Polyaniline Self-assembly Ionic charge

InGaN基LED中极化效应对发光特性的影响

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微纳电子技术 2017年第8期54卷 509-513页

作者：刘亚莹蒋府龙刘梦涵方华杰高鹏陈鹏施毅张荣郑有炓南京大学电子科学与工程学院江苏省光电信息功能材料重点实验室南京210093 南京大学扬州光电研究院江苏扬州225009

主要利用电致发光的实验手段,研究了极化效应对InGaN基LED器件发光特性的影响。实验中发现,InGaN基LED器件的峰位随注入电流的增加产生了先蓝移后红移的现象,蓝光和绿光LED分别蓝移3 nm和8 nm;而AlGaInP基红光LED器件的峰位仅红移。进... 详细信息

主要利用电致发光的实验手段,研究了极化效应对InGaN基LED器件发光特性的影响。实验中发现,InGaN基LED器件的峰位随注入电流的增加产生了先蓝移后红移的现象,蓝光和绿光LED分别蓝移3 nm和8 nm;而AlGaInP基红光LED器件的峰位仅红移。进一步研究发现,InGaN基LED的外量子效率在注入电流为50 mA处开始剧烈下降,AlGaInP基LED的外量子效率在100 mA处才开始缓慢下降,并且两者呈现不同的下降规律。通过与模拟结果对比发现,InGaN基LED的效率在下降开始阶段与俄歇复合引起的效率下降规律类似。以上实验结果表明,InGaN基LED器件中存在极化电场,且该极化电场会对LED器件的效率衰减产生促进作用。

关键词： InGaN 电致发光峰位相对外量子效率极化效应俄歇复合

Counteracting effects on ENSO induced by ocean chlorophyll interannual variability and tropical instability wave-scale perturbations in the tropical Pacific

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Science China Earth Sciences 2024年第2期67卷 387-404页

作者： rong-Hua zhang Feng TIAN Qidong shi Xiujun WANG Tongwen WU School of Marine Sciences Nanjing University of Information Science and TechnologyNanjing210044China Laoshan Laboratory Qingdao266237China Key Laboratory of Ocean Circulation and Waves Institute of OceanologyChinese Academy of SciencesQingdao266071China University of Chinese Academy of Sciences Beijing101408China Faculty of Geographical Sciences Beijing Normal UniversityBeijing100875China Earth System Modeling and Prediction Centre China Meteorological AdministrationBeijing100081China

Large perturbations in chlorophyll(Chl)are observed to coexist at interannual and tropical instability wave(TIW)scales in the tropical Pacific;at present,their combined effects on El Ni?o-Southern Oscillation(ENSO)through ocean biologyinduced heating(OBH)feedbacks are not understood ***,a hybrid coupled model(HCM)for the atmosphere and ocean physics-biogeochemistry(AOPB)in the tropical Pacific is adopted to quantify how ENSO can be modulated by Chl perturbations at interannual and TIW scales,individually or collectively,*** HCM-based sensitivity experiments demonstrate a counteracting effect on ENSO:the bio-climate feedback due to large-scale Chl interannual variability acts to damp ENSO through its impact on upper-ocean stratification and vertical mixing,whereas that due to TIW-scale Chl perturbations tends to amplify *** ENSO simulations are sensitively dependent on the ways Chl effects are represented at these different scales,it is necessary to adequately take into account these related differential Chl effects in climate modeling.A bias source for ENSO simulations is illustrated that is related with the Chl effects in the tropical Pacific,adding in a new insight into interactions between the climate system and ocean ecosystem on different scales in the *** results reveal a level of complexity of ENSO modulations resulting from Chl effects at interannual and TIW scales,which are associated with ocean biogeochemical processes and their interactions with physical processes in the tropical Pacific.

关键词： Ocean chlorophyll Bio-climate feedbacks Interannual variability Tropical instability waves Counteracting effects A hybrid coupled model

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Search for the Metal-weak Thick Disk from the LAMOST DR5

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Research in Astronomy and Astrophysics 2022年第2期22卷 72-85页

作者： Tai-Sheng Yan Jian-rong shi Hao Tian Wei zhang Bo zhang Key Laboratory of Optical Astronomy National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100012China School of Astronomy and Space Science University of Chinese Academy of SciencesBeijing 100049China Key Laboratory of Space Astronomy and Technology National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China Department of Astronomy Beijing Normal UniversityBeijing 100875China

Based on the data release of the Large Sky Area Multi-Object Fiber Spectroscopic Telescope survey(LAMOST DR5)and the Gaia Early Data Release 3(Gaia EDR3),we construct a sample containing 46,109 giant(log g≤3.5 dex)stars with heliocentric distance d≤4 kpc,and the sample is further divided into two groups of the inner(RGC8.34 kpc).The LZdistributions of our program stars in the panels with different[Fe/H]and[α/Fe]suggest that the thick-disk consists of two distinct components with different chemical compositions and kinematic *** the inner region,the metal-weak thick disk(MWTD)significantly contributes when[α/Fe]>+0.2 dex and[Fe/H]-0.8 ***,MWTD clearly appears only when[α/Fe]>+0.2 dex and[Fe/H]<-1.2 dex for the outer region,and its proportion is lower than that of the inner region within the same *** results can be obtained from the V_(φ)*** higher fraction of MWTD in the inner region than that in the outer region implies that MWTD may form in the inner disk,and is observational evidence about the inside-out disk formation scenario.

关键词： stars:abundances stars:atmospheres Galaxy:structure Galaxy:kinematics and dynamics methods:data analysis

Hybrid supraparticles of carbon dots/porphyrin for multifunctional tongue-mimic sensors

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Chinese Chemical Letters 2022年第5期33卷 2715-2720页

作者： rong Hu Xingchun Zhai Yubin Ding Guoyue shi Min zhang School of Chemistry and Molecular Engineering Shanghai Key Laboratory for Urban Ecological Processes and Eco-RestorationShanghai Key Laboratory of Multidimensional Information ProcessingEngineering Research Centre for Nanophotonics and Advanced Instrument(Ministry of Education)East China Normal UniversityShanghai 200241China Department of Chemistry College of SciencesNanjing Agricultural UniversityNanjing 210095China

Supraparticles(SPs),such as assembly of inorganic components with organic,have made tremendous attention in biochemical analysis,which represents a novel but challenging research ***,a single-SPs multifunctional fluorescent sensor array has been developed for high-throughput detection of heavy metal ions in biofluids,which is based on an inorganic/organic hybrid SPs consisting of carbon dots(CDs)and an easily available porphyrin[5,10,15,20-tetra(4-carboxyphenyl)porphyrin(TCPP)].TCPP can aggregate with the CDs to form the assembly(CDs/TCPP SPs)through the electrostatic andπ-πstacking *** are two independent and clearly separated fluorescence emission peaks at 470 and 668 nm in the resultant CDs/TCPP SPs under 380 nm *** a proof-of concept design,F 470,F 668,F 668/F 470 of SPs are chosen as three sensor components to constitute our sensor *** the addi-tion of metal ions,three sensor components can generate different fluorescence response patterns for discriminating 11 heavy metal ions via principal component analysis(PCA).Additionally,thiols can read-ily capture Cu^(2+)to switch the fluorescence of CDs/TCPP initially altered by Cu^(2+).Hence,CDs/TCPP-Cu^(2+)ensemble is further demonstrated to be a powerful sensor array for pattern recognition of 7 thiols and even chiral recognition of cysteine *** novel strategy avoids the tanglesome synthesis of multiple sensing probes and dedicates an innovative method for the facile establishment of tongue-mimic sensors,which would prospectively sprout more homologous assumptions to broaden its application toward more biosensing fields.

关键词： Supraparticles Carbon dots Porphyrin Pattern recognition sensor array Heavy metal ions Thiols