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| 1 | Spatiotemporal variation in alpine grassland phenology in the Qinghai-Tibetan Plateau from 1999 to 2009显示文摘Plant phenology is the most salient and sensitive indicator of terrestrial ecosystem response to climate change.Studying its change is significantly important in understanding and predicting impressively changes in terrestrial ecosystem.Based on NDVI from SPOT VGT,this paper analyzed the spatiotemporal changes in alpine grassland phenology in Qinghai-Tibetan Plateau from 1999 to 2009.The results are enumerated as follows:(1) The spatial distribution of the average alpine grassland phenology from 1999 to 2009 is closely related to water and heat conditions.Accompanying the deterioration in heat and water conditions from southeast to northwest,the start of growth season(SOG) was delayed gradually,the end of growth season(EOG) advanced slowly,and the length of growth season(LOG) shortened gradually.Elevation played an important role in the regional differentiation of phenology,but a dividing line of approximately 3500 m existed.Below this line,the phenology fluctuated irregularly with altitude change,whereas above the line,the phenology is closely related to altitude change.(2) From 1999 to 2009,SOG of the alpine grassland came earlier by six days per decade(R2=0.281,P=0.093),EOG was late by two days per decade(R2=0.031,P=0.605),and LOG lengthened by eight days per decade(R2=0.479,P=0.018).The early SOG,the late EOG,and the extended LOG mainly occurred at the center and east of the Plateau.SOG in most of the Plateau advanced significantly,especially in the eastern Plateau.(3) The inter-annual phenology changes of the alpine grassland in the Qinghai-Tibetan Plateau exhibited significant differentiation at different elevation and natural zones.The inter-annual changes at high altitude were more complicated than that at low altitude.The most significant phenology changes were found in the eastern Qinghai-Qilian montane steppe zone,and non-significant changes occurred in the Southern Tibet montane shrub-steppe zone. | DING MingJun ZHANG YiLi SUN XiaoMin LIU LinShan WANG ZhaoFeng BAI WanQi | 2013 | Chinese Science Bulletin2013，58，3： | 44 |
| 2 | Atomic mobilities and diffusivities in Al alloys显示文摘Knowledge of diffusivity is a prerequisite for understanding many scientific and technological disciplines.In this paper,firstly major experimental methods,which are employed to provide various diffusivity data,are briefly described.Secondly,the fundamentals of various computational methods,including first-principles method,embedded atomic method/molecular dynamic simulation,semi-empirical approaches,and phenomenological DICTRA technique,are demonstrated.Diffusion models recently developed for order/disorder transitions and stoichiometric compounds are also briefly depicted.Thirdly,a newly established diffusivity database for liquid,fcc_A1,L12,bcc_A2,bcc_B2,and intermetallic phases in the multicomponent Al alloys is presented via a few case studies in binary,ternary and quaternary systems.And the integration of various computational techniques and experimental methods is highlighted.The reliability of this diffusivity database is validated by comparing the calculated and measured concentration profiles,diffusion paths,and Kirkendall shifts in various binary,ternary and quaternary diffusion couples.Next,the established diffusivity databases along with thermodynamic and other thermo-physical properties are utilized to simulate the microstructural evolution for Al alloys during solidification,interdiffusion and precipitation.A special discussion is presented on the phase-field simulation of interdiffusion microstructures in a series of Ni-Al diffusion couples composed of γ,γ',and β phases under the effects of both coherent strain and external compressive force.Future orientations in the establishment of next generation of diffusivity database are finally addressed. | DU Yong ZHANG LiJun CUI SenLin ZHAO DongDong LIU DanDan ZHANG WeiBin SUN WeiHua JIE WanQi | 2012 | Science China(Technological Sciences)2012，55，2： | 6 |
| 3 | Effect of dimensional expansion on carrier transport behaviors of the hexagonal Bi-based perovskite crystals显示文摘All-inorganic Cs_(3)Bi_(2)I_(9)(CBI)halide perovskites are sought to be candidate for photoelectrical materials because of their low toxicity and satisfactory stability.Unfortunately,the discrete molecular[Bi2I9]3−clusters limit the charge-transport behaviors.Herein,the defect halide perovskite based on trivalent Bi^(3+)is expanded to Cs_(3)Bi_(2)I_(6)Br_(3)(CBIB).Centimeter-size CBIB single crystal(Φ15×70 mm^(3))was grown by the vertical Bridgeman method.The powder X-ray diffraction analysis shows that CBIB has structure with lattice parameters of a=b=8.223Å,c=10.024Å,α=β=90°andγ=120°.The density functional theory(DFT)calculations demonstrate that the charge density distribution was enhanced after the dimensional expansion.The enhancement of carrier transport ability of(00l)in-plane is characterized before and after dimensional improvement.The obtained CBIB(001)exhibited an electron mobility up to 40.03 cm^(2)V^(−1)s^(−1)by time-of-flight(TOF)technique,higher than 26.46 cm^(2)V^(−1)s^(−1)of CBI(001).Furthermore,the X-ray sensitivity increases from 707.81μC Gy^(−1)cm^(−2)for CBI(001)to 3194.59μC Gy−1 cm^(−2)for CBIB(001).This research will deepen our understanding of Bi-based perovskite materials and afford more promising strategies for lead-free perovskite optoelectronic devices modification. | Qihao Sun Bao Xiao Leilei Ji Dou Zhao Jinjin Liu Wei Zhang Menghua Zhu Wanqi Jie Bin-Bin Zhang Yadong Xu | 2022 | Journal of Energy Chemistry2022，31，3： | 1 |
| 4 | 基于巯基反应性多重定量技术的亲电性天然产物靶点发现显示文摘文章简介天然产物是新药开发和化学生物学研究的重要来源。天然产物化学结构上常见一些亲电性基团如迈克尔反应受体、环氧。这类具有亲电性的天然产物能够通过共价修饰特定功能半胱氨酸残基上的亲核性巯基基团,从而影响其所在蛋白质的功能,并且最终发挥生物学效应。 | Caiping Tian Rui Sun Keke Liu Ling Fu Xiaoyu Liu Wanqi Zhou Yong Yang 杨靖 | 2018 | 科学新闻2018，0，4： | 0 |
| 5 | The impact of EV71 vaccination program on hand,foot and mouth disease in Zhejiang Province,China:A negative control study显示文摘Objective:To estimate the potential causal impact of Enterovirus A71(EV71)vaccination program on the reduction of EV71-infected hand,foot,and mouth disease(HFMD)in Zhejiang Province.Methods:We utilized the longitudinal surveillance dataset of HFMD and EV71 vaccination in Zhejiang Province during 2010-2019.We estimated vaccine efficacy using a Bayesian structured time series(BSTS)model,and employed a negative control outcome(NCO)model to detect unmeasured confounding and reveal potential causal association.Results:We estimated that 20,132 EV71 cases(95%CI:16,733,23,532)were prevented by vaccination program during 2017-2019,corresponding to a reduction of 29%(95%CI:24%,34%).The effectiveness of vaccination increased annually,with reductions of 11%(95%CI:6%,16%)in 2017 and 66%(95%CI:61%,71%)in 2019.Children under 5 years old obtained greater benefits compared to those over 5 years.Cities with higher vaccination coverage experienced a sharper EV71 reduction compared to those with lower coverage.The NCO model detected no confounding factors in the association between vaccination and EV71 cases reduction. | Dashan Zheng Lingzhi Shen Wanqi Wen Feng Ling Ziping Miao Jimin Sun Hualiang Lin | 2023 | Infectious Disease Modelling2023，8，4： | 0 |
| 6 | Efficient capture of C_(2)H_(2)from CO_(2)and C_(n)H_(4)by a novel fluorinated anion pillared MOF with flexible molecular sieving effect显示文摘The efficient separation of acetylene(C_(2)H_(2))from carbon dioxide(CO_(2))and CnH_(4)(n=1 and 2)to manufacture high purity C_(2)H_(2)and recover other light hydrocarbons is technologically important,while posing significant challenges.Herein,we reported a new TiF62−anion(TIFSIX)pillared metal-organic framework(MOF)ZNU-5(ZNU=Zhejiang Normal University)with ultramicropores for highly selective C_(2)H_(2)capture with low adsorption heat through gate opening based molecular sieving effect.ZNU-5 takes up a large amount of C_(2)H_(2)(128.6 cm^(3)/g)at 1.0 bar and 298 K but excludes CO_(2),CH_(4),and C_(2)H_(4).Such high capacity has never been realized in MOFs with molecular sieving.The breakthrough experiments further confirmed the highly selective C_(2)H_(2)separation performance from multi-component gas mixtures.3.3,2.8,and 2.2 mmol/g of C_(2)H_(2)is captured at ZNU-5 from equimolar C_(2)H_(2)/CO_(2),C_(2)H_(2)/CO_(2)/CH_(4),and C_(2)H_(2)/CO_(2)/CH_(4)/C_(2)H_(4)mixtures,respectively.Furthermore,2.6,2.0,and 1.5 mmol/g of>98%purity C_(2)H_(2)can be recycled from the desorption process.Combining high working capacity,low adsorption heat,as well as good recyclability,ZNU-5 is promising for C_(2)H_(2)purification. | Lingyao Wang Nuo Xu Yongqi Hu Wanqi Sun Rajamani Krishna Jiahao Li Yunjia Jiang Simon Duttwyler Yuanbin Zhang | 2023 | Nano Research2023，16，2： | 0 |
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