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| 1 | ASYMPTOTIC BEHAVIOR OF NONAUTOMOMOUSDIFFUSIVE LOTKA-VOLTERRA MODEL显示文摘The purpose of this paper is to investigate the asymptotic behavior of apredator-prey model. The model is composed of two patches. The system has two species:one can dense between the tWo patches, but the other is confined to one of the patches andcannot diffuse. It is proved that the system is globally stable under appropriate conditions. | CAO Feng CHEN Lansun(Institute Of Mathematics, Academia Silica, Beijing 100080, China) | 1998 | Systems Science and Mathematical Sciences1998，11，2： | 11 |
| 2 | Geometric approach to the stability analysis of the periodic solution in a semi-continuous dynamic system显示文摘 | Yuan Tian Kaibiao Sun Lansun Chen | 2014 | International Journal of Biomathematics2014，7，2： | 7 |
| 3 | Novel hydrogen storage properties of palladium nanocrystals activated by a pentagonal cyclic twinned structure显示文摘研究人员们看起来忽视了雏晶的一种特殊形式,五角的周期的 twinning,明显的二维的格子扩大在存在导致新奇 physicalchemical 性质在几何、电子的结构与变化联系了。在 Pd nanocrystals 把氢的存储和版本用作一根探针,我们发现了五角的周期的孪生的 Pd nanocrystals 有的那 icosahedral 不同的氢存储性质由于二维的格子扩大,与那些相当不同八面的单个水晶的对应物。另外,在五角的周期的孪生的 Pd nanocrystals 的二维的格子扩大在电子结构引起一个变化,它导致在 PdH x 五角的周期的孪生的 nanocrystals。 | Huang Huang Shixiong Bao Qiaoli Chen Yanan Yang Zhiyuan Jiang Qin Kuang Xiaoyin Wu Zhaoxiong Xie Lansun Zheng | 2015 | Nano Research2015，8，8： | 7 |
| 4 | A facile surfactant-free synthesis of Rh flower-like nanostructures constructed from ultrathin nanosheets and their enhanced catalytic properties显示文摘Rh 是广泛地在许多器官的反应被使用的重要催化剂。在最近的年里,许多努力集中了于由与控制尺寸和形态学制作催化剂 nanoparticles 改进它的催化效率。然而,也把有机化合物用作反应媒介或盖住代理人的经常采用的合成线路经常在催化剂表面上导致剩余分子,它急速地接着减少催化表演。此处,我们报导甲醛经由 Rh (acac )3 的热水的减小获得的新奇 Rh 象花的结构的灵巧的、水的、没有表面活化剂的合成。唯一的 Rh nanoflowers 从 ultrathin nanosheets 被构造,其基础表面包括了 { 111 } 有 ~ 的平均厚度的方面 1.1 nm。特定的表面区域由公司脱衣测量了 79.3 是 m 2 钟声到 134.4 食火鸟的浸透的磁化 ???? 愠汬祯湩吗?? | Yaqi Jiang Jingyun Su Yanan Yang Yanyan Jia Qiaoli Chen Zhaoxiong Xie Lansun Zheng | 2016 | Nano Research2016，9，3： | 7 |
| 5 | A STAGE-STRUCTURED SI ECO-EPIDEMIOLOGICAL MODEL WITH TIME DELAY AND IMPULSIVE CONTROLLING显示文摘这篇论文提出柔韧的组织阶段的 SI 有周期的经常的脉搏与病原体释放传染害虫的 eco 流行病学的模型。作者证明因此,为系统的周期的答案和永久性取决于的‘ p est-eradication' 的全球 attractivity 的条件预定延期作者叫它“无益”。进一步,在场的作者害虫人口在经济阀值水平(ETL ) 下面被放在的害虫管理策略当害虫人口是一致地坚持的时。由数字分析,作者也为传染害虫释放的易受影响的害虫和脉搏显示出那经常的成熟时间延期能在系统的动力学上带明显的效果。 | Xinzhu MENG Lansun CHEN | 2008 | Journal of Systems Science & Complexity2008，21，3： | 5 |
| 6 | PERMANENCE AND PERIODIC SOLUTION IN AN INTEGRODIFFERENTIAL SYSTEM WITH DISCRETE DIFFUSION显示文摘Dynamical characteristics of an integrodifferential modelling competitive sys-tem with diffusion are investigated.In particular,we derive sufficient conditions for the permanence of species,existence of an attracting periodic solution to the periodic system.The results of Wang Ke in 1994 and 1998 are improved and extended. | XIAO Yanni CHEN Lansun TANG Sanyi (Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing 100080, China) | 2003 | Journal of Systems Science & Complexity2003，16，1： | 5 |
| 7 | Analysis of a SIS epidemic model with stage structure and a delay显示文摘A disease transmission model of SIS type with Stage structure and a delay corresponding to the infectious period is formulated. By constructing the difference operator and using global convergence theorem, we show that the disease-free equilibrium is globally asymp- totically stable. The Stability of an endemic equilibrium are investigated for the differential- difference equations. | Yanni XIAO and Lansun CHEN (Academy of Mathematics & System Sciences, Academic Sinica, Beijing 100080, China | 2001 | Communications in Nonlinear Science and Numerical Simulation2001，6，1： | 5 |
| 8 | PERSISTENCE IN A THREE SPECIES LOTKA-VOLTERRA PERIODIC PREDATOR-PREY SYSTEM显示文摘PERSISTENCEINATHREESPECIESLOTKA-VOLTERRAPERIODICPREDATOR-PREYSYSTEMCHENLansun;PENGQiuliang(InstituteofMathematics,AcademiaSin... | CHEN Lansun PENG Qiuliang | 1994 | Systems Science and Mathematical Sciences1994，7，4： | 4 |
| 9 | AN SEIRS EPIDEMIC MODEL WITH TWO DELAYS AND PULSE VACCINATION显示文摘脉搏种痘是有效、重要的策略根除传染疾病。作者与二延期和脉搏种痘调查一个 SEIRS 流行模型。由使用频闪观测仪的地图决定的分离动态系统,作者获得如果,传染人口灭绝 R Δ<
1,并且传染人口是一致地坚持的如果 R Δ>
1。结果显示脉搏种痘或大脉搏种痘率的一个短时期是一个足够的条件根除疾病。 | Jianjun JIAO Lansun CHEN Shaohong CAI | 2008 | Journal of Systems Science & Complexity2008，21，2： | 4 |
| 10 | AN IMAGE MAGNIFICATION ALGORITHM USING THE GVF CONSTRAINT MODEL显示文摘An image magnification method with a Gradient Vector Flow(GVF)constraint-basedanisotropic diffusion model is proposed in this letter.A Low-Resolution(LR)image is first magnifiedusing bilinear interpolation,and then an iterative image restoration method,with the use of an ani-sotropic diffusion model and a Gaussian moving-average constraint,is applied to the magnified image.The estimated GVF of a High-Resolution(HR)image can be used to remove the jagged effect and topreserve the textural structure in the image.Meanwhile,the use of the Gaussian moving-average LRmodel can provide a data fidelity constraint,which renders a magnified image closer to the ideal HRversion.Experimental results show that the proposed method can improve the quality of magnifiedimages in terms of both objective and subjective criteria. | Li Xiaoguang Lam Kin-Man Shen Lansun | 2008 | Journal of Electronics(China)2008，25，4： | 4 |
| 11 | A simple solvothermal route towards the morphological control of ZnO and tuning of its optical and photocatalytic properties显示文摘ZnO nanoparticles with different morphologies were solvothermally synthesized by controlling the alkali (sodium hydroxide) concentration in an isopropanol solution.The products were characterized by means of powder X-ray diffraction,UV-visible absorption spectra,scanning electron microscopy,transmission electron microscopy,and selected area electron diffraction.The morphologies of the formed ZnO nanocrystals were dependent on the concentration of the alkali,and with increases of sodium hydroxide concentration,the ZnO nanocrystals evolved from rod to hexagonal bipyramid,and then to a flower-like nanostructure.The flower-like nanostructure resulted from the etching of the hexagonal bipyramid by the excess alkali.The photoluminescence and photocatalytic properties of the prepared ZnO were investigated.The difference of green emission among the ZnO nanocrystals indicated that a higher sodium hydroxide concentration led to a higher level of defects.The size,the surface structure and defects in the ZnO nanocrystals affected its photo-degradation characteristics. | JIANG YaQi,LI FangFang,SUN Ran,XIE ZhaoXiong & ZHENG LanSun State Key Laboratory for Physical Chemistry of Solid Surfaces Department of Chemistry,College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005,China | 2010 | Science China Chemistry2010，53，8： | 3 |
| 12 | Thiol-stabilized atomically precise, superatomic silver nanoparticles for catalysing cycloisomerization of alkynyl amines显示文摘Both the electronic and surface structures of metal nanomaterials play critical roles in determining their chemical properties. However, the non-molecular nature of conventional nanoparticles makes it extremely challenging to understand the molecular mechanism behind many of their unique electronic and surface properties. In this work, we report the synthesis, molecular and electronic structures of an atomically precise nanoparticle, [Ag206 L72]~q(L = thiolate, halide; q = charge). With a four-shell Ag7@Ag32@Ag77@Ag90 Ino-decahedral structure having a nearly perfect D_(5h) symmetry, the metal core of the nanoparticle is co-stabilized by 68 thiolate and 4 halide ligands. Both electrochemistry and plasmonic absorption reveal the metallic nature of the nanoparticles, which is explained by density functional theory calculations.Electronically, the nanoparticle can be considered as a superatom, just short of a major electron shell closing of 138 electrons(q = –4). More importantly, many of ligands capping on the nanoparticle are labile due to their low-coordination modes, leading to high surface reactivity for catalysing the synthesis of indoles from 2-ethynylaniline derivatives. The results exemplify the power of the atomic-precision nanocluster approach to catalysis in probing reaction mechanisms and in revealing the interplay of heterogeneous reactivities,electronic and surface structural dynamics, thereby providing ways for optimization. | Juanzhu Yan Jun Zhang Xumao Chen Sami Malola Bo Zhou Elli Selenius Xiaomin Zhang Peng Yuan Guocheng Deng Kunlong Liu Haifeng Su Boon K.Teo Hannu Hakkinen Lansun Zheng Nanfeng Zheng | 2018 | National Science Review2018，5，5： | 3 |
| 13 | Facile synthesis of size-tunable ZIF-8 nanocrystals using reverse micelles as nanoreactors显示文摘This paper describes a robust method for the synthesis of high-quality ZIF-8 nanocrystals using reverse micelles as discrete nanoscale reactors.The precise size control of ZIF-8 nanocrystals is conveniently achieved by tuning the concentration of precursors,reaction temperatures,the amount of water,and the structure of surfactants.The as-synthesized ZIF-8 nanocrystals are of narrow distribution and tunable size.A size-dependent catalytic activity for Knoevenagel condensation reaction is further demonstrated by using ZIF-8 nanocrystals with different sizes as the catalysts.This facile method opens up a new opportunity in the synthesis of various ZIFs nanocrystals. | ZHAO XiaoJing FANG XiaoLiang WU BingHui ZHENG LanSun ZHENG NanFeng | 2014 | Science China Chemistry2014，57，1： | 3 |
| 14 | HOMOCLINIC BIFURCATION IN SEMI-CONTINUOUS DYNAMIC SYSTEMS显示文摘 | CHUANJUN DAI MIN ZHAO LANSUN CHEN | 2012 | International Journal of Biomathematics2012，5，6： | 3 |
| 15 | One-step synthesis of thermally stable artificial multienzyme cascade system for efficient enzymatic electrochemical detection显示文摘Recently,metal-organic framework(MOF)-based multienzyme systems integrating different functional natural enzymes and/or nanomaterial-basedartificial enzymes are attracting increasing attention due to their high catalytic efficiency and promising application in sensing.Simpleand controllable integration of enzymes or nanozymes within MOFs is crucial for achieving efficient cascade catalysis and high stability.Here,we report a facile electrochemical assisted biomimetic mineralization strategy to prepare an artificial multienzyme system for efficient electrochemicaldetection of biomolecules.By using the G0x@Cu-MOF/copper foam(G0x@Cu-MOF/CF)architecture as a proof of concept,efficientenzyme immobilization and cascade catalysis were achieved by in situ encapsulation of glucose oxidase(GOx)within MOFs layer grown onthree-dimensional(3D)porous conducting CF via a facile one-step electrochemical assisted biomimetic mineralization strategy.Due to thebio-electrocatalytic cascade reaction mechanism,this well-designed GOx@Cu-MOF modified electrode exhibited superior catalytic activityand thermal stability for glucose sensing.Notably,the activity of GOx@Cu-MOF/CF still remained at ca.80%after being incubated at 80℃.In sharp contrast,the activity of the unprotected electrode was reduced to the original 10%after the same treatment.The design strategypresented here may be useful in fabricating highly stable enzyme@MOF composites applied for efficient photothermal therapy and otherplatform under high temperature. | Xiqing Cheng Jinhong Zhou Jiayu Chen Zhaoxiong Xie Qin Kuang Lansun Zheng | 2019 | Nano Research2019，12，12： | 3 |
| 16 | HETEROCLINIC BIFURCATIONS OF A PREY-PREDATOR FISHERY MODEL WITH IMPULSIVE HARVESTING显示文摘 | CHUNJIN WEI LANSUN CHEN | 2013 | International Journal of Biomathematics2013，6，5： | 3 |
| 17 | The dynamics of an age structured predator–prey model with disturbing pulse and time delays显示文摘 | Xinzhu Meng Jianjun Jiao Lansun Chen | 2007 | Nonlinear Analysis: Real World Applications2007，，2： | 2 |
| 18 | GLOBAL ASYMPTOTIC STABILITY IN A NONAUTONOMOUS COOPERATIVE SYSTEM显示文摘In this papert we consider the asymptotic behavior of a nonautonomous co-operative system. A sufficient condition is obtained for the existence of a unique globallyasymptotically stable strictly positive periodic solution for the nonautonomous systemwhen it is ω-periodic (ω>0). | CUI Jin’an CHEN Lansun Department of Mathematics Xinjiang University,Urumuqi 830046.China Institute of Mothemotics, Academia Sinica, Beijing 100080, China | 1993 | Systems Science and Mathematical Sciences1993，6，1： | 2 |
| 19 | THE PERIODIC VOLTERRA MODEL WITH MUTUAL INTERFERENCE AND IMPULSIVE EFFECT显示文摘 | YUJUAN ZHANG LANSUN CHEN | 2012 | International Journal of Biomathematics2012，5，3： | 2 |
| 20 | Surfactant dependent evolution of Au-Pd alloy nanocrystals from trisoctahedron to excavated rhombic dodecahedron and multipod: a matter of crystal growth kinetics显示文摘In wet chemical syntheses of noble metal nanocrystals,surfactants play crucial roles in regulating their morphology.To date,more attention has been paid to the effect of the surfactant on the surface energy of crystal facets,while less attention has been paid to its effect on the growth kinetics.In this paper,using the growth of Au-Pd alloy nanocrystals as an example,we demonstrate that different concentration of surfactant hexadecyltrimethyl ammonium chloride(CTAC)may cause the different packing density of CTA+bilayers on different sites(face,edge or vertex)of crystallite surface,which would change the crystal growth kinetics and result in preferential crystal growth along the edge or vertex of crystallites.The unique shape evolution from trisoctahedron to excavated rhombic dodecahedron and multipod structure for Au-Pd alloy nanocrystals was successfully achieved by simply adjusting the concentration of CTAC.These results help to understand the effect of surfactants on the shape evolution of nanocrystals and open up avenues to the rational synthesis of nanocrystals with the thermodynamically unfavorable morphologies. | Qiaoli Chen Guifen Du Yongdi Dong Zhenming Cao Zhaoxiong Xie Lansun Zheng | 2017 | Science Bulletin2017，62，20： | 2 |
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