高维空间中半线性波动方程的局部解

研究高维空间中半线性波动方程ｕｕ－△ｕ＝ｕ＾ｋ（ｘ∈Ｒ＾ｎ,ｋ∈Ｚ＾＋,ｋ≥２）的低正则性,得到了其Ｓｏｂｏｌｅｖ指数为ｎ／２－１／（ｋ－１）。     

一类电报方程解的Sobolev指数

对一般的偏微分方程,其Ｓｏｂｏｌｅｖ指数为（ｎ２＋１）,Ｐｏｎｃｅ和Ｓｉｄｅｒｉｓ（Ｃｏｍｍｕｎ．ｉｎＰＤＥ,１９９３,１８（２～４）：１６９）证明了对一些具特殊非线性项的半线性方程,如ｕｔ－Δｕ＝ｕｋ（Ｄｕ）α（ｘ∈Ｒｎ,ｋ∈Ｚ＋,ρ＝｜α｜≥２）,其Ｓｏｂｏｌｅｖ指数会在ｎ２与（ｎ２＋１）之间,本文研究半线性电报方程ｕｔ－Δｕ＋ｐｕ＝ｕｋ（Ｄｕ）α（ｘ∈Ｒｎ,ｋ∈Ｚ＋,ρ＝｜α｜≥２,ｐ≠０）,得到了其Ｓｏｂｏｌｅｖ指数仍然在区间（ｎ２,ｎ２＋１）之内,因此本文可以看作是Ｐｏｎｃｅ和Ｓｉｄｅｒｉｓ工作的继续     

无界域上Schroedinger型方程的整体吸引子

本文证明了Ｓｃｈｒｏｄｉｎｇｅｒ型方程δｔｕ＝（ｋ＋ｉβ）Δｕ－│ｕ│＾ρｕ－λｕ－ｇ，ｕ（ｘ，０）＝ｕ０。其中ｕ＝ｕ（ｘ，ｔ），ｇ＝ｇ（ｘ），ｋ〉０，ρ〉０，λ〉０，ｘ∈Ｒ＾ｎ在加权Ｓｏｂｏｌｅｖ空间中强和弱吸引子的存在性，并对吸引子的分形维数也给出了估计。     

具有Soblev临界指数的非线性椭圆型方程解的存在性

设Ω∈Ｒ＾Ｎ（Ｎ〉２）是单位球，文中讨论了非线性椭圆型方程｛－△ｎ＝ａ（ｘ）／ｎ／＾２－２＾ｕ＋λｕ，ｘ∈Ω，ｎ＝０，解的存在性，其中２＝２Ｎ／Ｎ－２是Ｓｏｂｏｌｅｖ临界指数，λ为常数。在ｎ（ｘ）的适当限制下，得到了上述问题的一个存在性结果。     

R^N中一类带p—凹凸非线性项的拟线性椭圆方程的无穷可解性

在适当条件下,得到Ｒ＾Ｎ中的ｐ－Ｌａｐｌａｃｅ方程－ｄｉｖ（｜△ｕ｜＾ｐ－２△ｕ）＋ａ（ｘ）｜ｕ｜＾ｐ－２ｕ＝ｈ（ｘ）｜ｕ｜＾ｑ－２ｕ＋λ｜ｕ｜＾ｓ－２ｕ,ｕ∈Ｗ＾１．ｐ（Ｒ＾Ｎ）的无穷多解的存在性,其中：ｐ〈Ｎ,１〈ｐ〈ｓ〈ｐ＾＊＝Ｎｐ／（Ｎ－ｐ）。     

一类非线性退缩椭圆组弱解梯度的Lp-估记

利用Ｍｕｃｋｅｎｈｏｕｐｔ提出的Ａ２类函数的性质和带Ａ２类权函数Ｓｏｂｏｌｅｖ空间Ｈ＾１（Ω,Ｒ＾Ｎ,λ）的嵌入不等式,对满足控制增长和自然增长条件下的非线性退缩椭圆组,建立了弱解梯度的Ｌ＾ｐ－估计,只要λ＾２（ｘ）∈Ａ２,就可以将Ｇｉａｑｕｉｎｔａ关于一致椭圆组的有关结果推广到爱缩椭圆组。     

Stein流形上凸区域的边界性质

研究Ｃ＾ｎ空间和Ｓｔｅｉｎ流形上凸区域的边界性质,利用局部化技巧和Ｃ＾ｎ空间中凸区域的ＣｏｘｏЦｋｕｕ－Ｐｌｅｍｅｌｊ公式,定义Ｓｔｅｉｎ流形上具有Ａｉｚｅｎｂｅｒｇ核的Ｃａｕｃｈｙ型积分的奇异积分的Ｃａｕｃｈｙ主值,得到如下的Ｓｔｅｉｎ流形上凸区域的ＣｏｘｏЦＫｕｕ－Ｐｌｅｍｅｌｊ公式Ｆ＾＋（η）＝Ｖ,Ｐ∫Ｍεｆ（ε）Ｋ（η,ε）＋１／２ｆ（η）,η∈Ｍ;Ａ＾－（η）＝Ｖ．Ｐ．∫Ｍεａ（ε）＾Ｔ     

Acerbi—Fusco定理的一个新证明

Ａｃｅｒｂｉ－Ｆｕｓｃｏ利用Ｓｏｂｏｌｅｖ空间ＷＰ（Ｇ，Ｅ＾Ｎ）中函数的逼定理得到了拟凸泛函Ｉ（ｕ，Ｇ）＝∫Ｇｆ（ｕ）ｄｘ，Ｕ∈ＷＰ（Ｇ，Ｅ＾Ｎ），Ｐ≥２，Ｎ〉１极小的部分正则性，Ｅｖａｎｓ－Ｇａｒｉｅｐｙ利用Ｒａｄｏｎ测度的性质重新证明了Ａｃｅｒｂｉ－Ｆｕｓｃｏ定量，本文我们给出一个较为简捷的证明，既不用Ｗ（Ｇ，Ｅ＾Ｎ）中的逼近定理，也不用Ｒａｄｏｎ测度的任何性质。     

关于高斯函数的几个恒等式

对高斯函数的两个恒等式：〔ｘ〕＋〔ｘ＋１／ｍ〕＋．．．＋〔ｘ＋ｍ－１／ｍ〕＝〔ｍｘ〕，其中ｘ∈Ｒ，ｍ∈Ｎ；１／２（ｐ－１）Σ（ｋ＝１）〔ｋｑ／ｐ〕＝Ｐ－１／２．ｑ－１／２，其中ｐ、ｑ是正奇数且（ｐ，ｑ）＝１，以及Ｔｏｍ．Ｍ．Ａｐｏｓｔｏｌ的一个问题“若ａ＝１，２，３，４，５，６，７。证明存在一个（依赖于ａ的）整数ｂ，使得ｎΣ（ｋ＝１）〔ｋ／８〕＝〔（２ｎ＋ｂ）＾２／８ａ〕”，作了进一步的推广，得到     

高阶演化方程任意阶精度的显式格式

讨论高阶演化方程ａｕ／ａｔ＝ａ（ａ＾２ｋ＋１）／（ａｘ＾２ｋ＋１）（其中ａ≠０为实常数,ｋ＝１,２,３,．．．）的２层３层显式差分格式,已有格式的精度是Ｏ（τ＋ｈ）或Ｏ（τ＋ｈ＾２）利用半离散化方法给出一类具有任意阶精度Ｏ（τ＾ｐ＋ｈ＾ｑ）（ｐ．ｑ＝１．２,．．．）的显式格式,ｐ＝３,４,ｑ＝２ｋ．２（ｋ＋２）（２层格式）和ｐ＝２,４,ｑ＝２ｋ,２（ｋ＋１）．２（ｋ＋３）（３层格式）（ｋ＝１,２,     

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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