一类椭圆边值问题的广义解

本文研究椭圆边值问题-Δu+λ|u|p-2u=h(x),x∈RN u(x)→0,|x|→∞ 广义解的存在性.其中1≤N,1＜p＜+∞,λ＞0,h∈LP'(RN),p1=p/p-1.利用变分方法及临界点理论得到该问题在空间εp中至少存在的一个广义解.     

一类带调和势的非线性阻尼Schrǒdinger方程

研究如下方程的初值问题iut=Δu-|x|2u+q(|u|2)u-(ia)/(2)u, x∈Rn, t＞0,u(x,0)=u0(x), x∈Rn,得出当初值u0和q满足一定的条件时,该方程不存在整体解.     

一类带调和势的非线性阻尼Schroedinger方程

研究如下方程的初值问题iut=Δu-|x|2u+q(|u|2)u-(ia)/(2)u, x∈Rn, t＞0,u(x,0)=u0(x), x∈Rn,得出当初值u0和q满足一定的条件时,该方程不存在整体解.     

三维空间中耦合非线性Schr(o)dinger方程组的整体解

证明了三维空间中一类耦合非线性Schr(o)dinger方程组的Cauchy问题iut+△u=α|u|α-1u|v|β+1, ivt+△v=b |u|α+1|v|β-1v,u(0,x)=u0(x),v(0,x)=v0(x),t＞0,x∈Rn,整体解的存在唯一性,并得到了解关于初值的连续依赖性及解具有的较强的衰减估计.     

R^N中带冲突非线性项的拟线性椭圆方程的多解性

考虑R^N中含正参数μ的拟线性椭圆方程-div(|↓△u|^p-2↓△u) |u|^p-2u=q(x)|u|^α-2u-μr(x)|u|^β-2u,u∈W^1,p(R^N),其中P：1＜p＜α＜β＜p^*,q∈L^∞（R^N)∩L^β/β-α（R^N),q(x)＞0,r∈L∞(R^N),r(x)≥d＞o。证明了当μ充分大时该方程无非零解,而当μ充分小时该方程有足够多的分别具有正能量与负能量的解。     

一类带调和势的非线性Schrodinger方程

研究一类带调和势的非线性Schrdinger方程iφt+(1)/(2)△φ-(1)/(2)|x|2φ+a|φ|qφ+b|φ|pφ=0,其中,t≥0,x∈Rn, a,b为常数,p≥q＞1.针对一般情况,运用分类讨论的思想,讨论了该方程具有初值时解的不稳定性质.     

R~N中带冲突非线性项的拟线性椭圆方程的多解性

考虑 RN中含正参数 μ的拟线性椭圆方程- div(| u| p -2 u) + | u| p-2 u=q(x) | u| α-2 u-μr(x) | u| β-2 u,u∈ W1,p(RN) ,其中 :10 ,r∈ L∞ (RN) ,r(x)≥ d>0 .证明了当 μ充分大时该方程无非零解 ,而当μ充分小时该方程有足够多的分别具有正能量与负能量的解 .     

一类拟线性椭圆方程的多解性

考虑在满足一定条件下,下列拟线性方程解的存在性和多解性:-n∑i=1(e)/(e)xi(|(△)u|p-2(e)u/(e)xi |u|p-2=a(x)|u|q-2u g(x),x∈Rn,结合扰动与变分方法,证明了当g(x),a(x),p,q给定适当条件时,上述方程至少有两个非零解存在.     

非线性项含临界指数的p - Laplace方程的解的存在性

证明了当λ>0时p -LaplaceDirichlet问题-div (| u| p - 2 u) =λ|u| q - 2 u + |u| p - 2 u ,u∈W1.p0 (Ω)无穷多解的存在性 ,其中Ω是RN 中的有界域 ,1相似文献   

障碍问题中的梯度的局部可积性

推导二阶退化椭圆偏微分方程divA(x,▽u(x))=0的障碍问题的解的微商的局部可积性,此二阶退化椭圆方程需满足A(x,ξ)·ξ≥α | ξ| p,| A(x,ξ)|≤β(| ξ|+k(x))p-1,p＞1.     

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.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

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     

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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Brief Introduction to “Journal of Jilin University( Science Edition) ”

<正>"Journal of Jilin University(Science Edition)"is a comprehensive academic journal in the fields of science sponsored by Jilin University and administrated by the Ministry of Education of the Peoples Republic of China.The journal started publication in 1955.The original name at starting publication was"Journal of Natural Science of Northeast People University",which was changed into"Acta Scientiarum Naturalium Universitatis Jilinensis"in 1958 owing to the name change of the university.The present journal name has