带梯度项的发展P-Laplace方程解的耗竭

考察带梯度项的发展p-Laplace方程的第一初边值问题　ut - div(｜u｜p- 2u) = - λ｜u｜α- 1u ｜u｜β, x ∈Ω,t> 0,u = 0, x ∈Ω,t> 0,u(x,0) = u0(x), x ∈Ω,其中p > 2,λ,α和β为正常数,u0(x) ∈L∞(Ω) ∩W1,p0 (Ω).　　众所周知,若方程不带梯度项,上述问题的解当且仅当0 < α< 1 时在有限时间内耗竭.本文的目的是研究方程右边正的梯度项是否会影响解的耗竭性.应用能量方法,我们给出了解在有限时间内耗竭的充分条件.     

一类带有Neumann边界的奇异拟线性椭圆方程解的存在性

应用变分方法中的极值理论来研究Neumann边界问题{ -div(｜x｜α｜▽u｜p-2▽u)=｜x｜βup(α,β)-1-λ｜x｜γup-1+｜x｜μq-1,u(x)＞0,x∈Ω｜▽u｜p-2?u/?u=0, x∈?Ω其中Ω是RN(N≥3)中具有C2光滑边界的有界区域,0 ∈Ω,n表示(e)Ω的单位外法向向量,且1＜p＜N,α＜0,β＜0,使得p(α,β)(△)p(N+β)/N-p+α＞P,γ＞α-p,P＜q＜p(α,μ).对于参数α,β,γ及μ的不同范围,建立上述方程解的存在性结果.其中对参数不同范围的讨论对解的存在性所起到的至关重要的作用.     

具有边界耗散的Kirchhoff型方程解的整体存在性及衰减估计

讨论了非线性Kirchhoff型方程uu-(Ψ)(‖ ▽u ‖22)△u+ aut=6 ｜ u｜β-2u的初边值问题,其中常数α,b＞0,β＞2函数(Ψ)∈C1([0,∞)；R+),当s≥0时,(Ψ)(s)≥λ0＞0.在一定的初始数据条件下,给出了解的整体存在性,并利用积分不等式证明了其能量衰减性.     

带调和势的非线性Shrdinger方程整体吸引子的维数估计(英文)

研究了带调和势的非线性Shrdinger方程:iut+uxx-x2u+｜u｜2u+iαu=f(x),α>0的长时间动力学行为,给出了该方程整体吸引子的Hausdorff维数和Fractal维数的上界估计.     

一类三阶拟线性微分方程非振动解的存在性

讨论三阶拟线性微分方程(p(t)｜u″｜α-1u″)′ q(t)｜u｜β-1u=0非振动解的存在性.其中α＞0,β＞0,p(t)和q(t)是定义在区间[a,∞)上的连续函数,且满足当t≥a时p(t)＞0,q(t)＞0.给出了当t→∞时此方程满足∫∞a1(p(t))1/αdt=∞的特殊非振动解存在的充分必要条件.     

一种临界增长p-Laplace方程的非平凡解

给出了一种RN中有界区域Ω上p-Laplace方程:- ·(c(x)｜ u｜p-2 u)=a(x)｜u｜q-2u+b(x)｜u｜α-2u+f(x,u)(q=Np/(N-p),N>p>α>1)在一定的条件下非平凡广义解存在性的结果.     

拟线性椭圆型方程边值问题解的存在性与惟一性

利用隐函数定理证明拟线性的方程初始值问题正径向解的存在性及解的唯一性,并证明了拟线性方程初始值问题正径向解对初始数据的连续依赖性,同时,也证明了2个不同的初值数据α>β>0,相应初始值问题解uα、uβ,收敛区间的长度Rα、Rβ,均满足uα(r)>uβ(r)、r∈(0,Rβ)及Rα>Rβ,而且解uα(r)与uβ(r)关于r单减。     

一类不定权弹性梁方程的正解

用Leray-Schauder不动点定理,讨论两端简单支撑弹性梁方程{u'+βu″-αu=λa(t)f(u),00.     

一类含二阶导数项非线性Schroedinger方程的爆破性质

研究了一类含二阶导数项非线性Schroedinger方程 iut＋δ△u＋[β△｜u｜2＋a｜u｜p-1]u=0, t＞0,x∈RN, （＊）其中δ和β是实参数.在a＞0,1 ≤ P＜N＋2/N-2：={N＋2/N-2,N≥3 ∞ ,N=1,2,时,讨论了该方程初值问题解的爆破性质.     

广义BBM-Burgers 方程稀疏波解的稳定性(英文)

考察了如下广义BBM Burgres方程ut+f(u) x =uxx+uxxt,u｜t =0 =uo(x)→u±,x→∞ . ( 1)稀疏波解的稳定性 ,即在u-0 ,的解 .     

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     

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     

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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