紧致流形上C~0流不变集的连续性

证明紧致流形上具有跟踪性的可扩流的不变集随扰动的连续性及 C0 流的弱不变集随扰动而连续变化的通有性     

一类广义Kirchhoff方程基态变号解的存在性

研究了一类广义Kirchhoff方程■其中a,b>0是常数.由于在方程中出现了非局部项■,所以，方程的变分泛函与b=0时方程的变分泛函具有不同的性质.与相关文献相比，g不需要满足单调性条件，并且非线性项g包含g(t)=|t|^p-2t(2r-2u和另一个非局部扰动.对于扰动问题，通过改进的AR条件和下降流不变集下的极大极小参数得到了扰动问题的变号解，进而得到了原方程的变号解.最后，证明了该变号解是原方程的基态变号解.     

符号系统的2类跟踪及其应用

证明了符号动力系统具有Lipschitz跟踪性和极限跟踪性.作为其应用,借助拓扑共轭证明了Smale马蹄,二次映射在其双曲不变集上具有(相对C1小扰动一致的)极限跟踪性;借助Lipschitz共轭证明了线性的马蹄在其双曲不变集上具有Lipschitz跟踪性.     

一类二阶微分方程组四解存在性

利用下降流不变集方法证明了一类二阶微分方程组四解的存在性定理,并利用此结果研究了一类二阶二次微分方程组的周期解.     

近似拟不变凸集值优化问题弱有效元的最优性条件

引进了集值映射的近似拟不变凸概念,它比拟不变凸性更弱。举例说明该凸性是拟不变凸性的真推广。借助广义切上图导数的性质给出了集值优化问题取得弱有效元的必要条件。当目标函数是近似拟不变凸时,得到了集值优化问题取得弱有效元的充分条件。     

一维单边接触过程的注记

构造了一维单边接触过程,给出了其存在性和吸引性,利用对偶的方法给出其临界值的估计,并且运用一维单边接触过程的吸引紧邻性,给出了该过程的不变测度极点集,它是仅含有上不变测度和下不变测度的集合。     

一类Hamilton系统的多解问题

利用下降流不变集方法和极小对偶作用原理,证明了一类自治Hamilton系统4个周期解的存在性定理．     

一个半线性椭圆方程组无穷多变号解的存在性

利用下降流不变集方法,得到了RN上一个半线性椭圆方程组无穷多非径向对称变号解的存在性.     

一类Semipositone问题的多个正解

结合上下解方法与下降流不变集临界点理论,在一般有界区域上,研究了一类Semipositone问题3个正解的存在性.     

L—Fuzzy拓扑空间中的强Lindeloef性

证明了在一定条件下，强Ｌｉｎｄｅｌｏｆ性是连续映射下的不变性质与逆不变性质，并证明了一个强Ｆ紧集与一个有强Ｌｉｎｄｅｌｏｆ性质的集的乘积仍具有强Ｌｉｎｄｅｌｏｆ性质。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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