一类具有非齐次边界条件的非线性抛物方程解的梯度爆破问题

讨论了如下一类带有齐次边界条件的非线性抛物方程ut-△u=｜△↑u｜^p＋α（x）u^q。解的爆破问题，给出了方程解梯度爆破和L^∞爆破的条件．     

各向异性非线性Schrisdinger方程的整体可解性

研究了各向异性的Schrsdinge；方程iut＋△u＋aux｜x｜x｜＋bux｜x｜x｜x｜x｜x＋｜u｜αu的初值问题的整体可解性，其中a,b都是实常数，a是正常数。选取合适的P=2（a＋2）/as＋2，利用非线性项｜u｜au的估计和各向异性的Schrodinger-算子S（t）的L^P-L^p估计，以及利用Banach不动点定理，获得了整体（几乎整体）解在Es（E^sT0）中的存在性。     

一类非线性Kirchhoff波方程整体解的存在性

研究了如下Kirchhoff波方程的初边值问题uu-m（‖△↓u‖2^2）△u＋g（ut）p（t）=β｜u｜^q-1u,证明了整体解的存在性,并讨论了解的衰减．     

带调和势的非线性Schroedinger方程的整体吸引子

讨论了带调和势的非线性Schroedinger方程iut＋uxx-x^2u＋｜u｜^2u＋iαu=f（x）解的长时间行为,证明了该方程整体吸引子的存在性.     

一类半线性椭圆方程正解的渐近行为

讨论椭圆方程△u＋｜r｜^lu^p＋｜r｜^-2u^q=0 in R^n的正径向对称解．其中1〈P〈q,-2〈l〈0．该方程的正径向解极限总是存在,即r→∞lim1＋2/rp-1u=L.特别的,并讨论了该方程的解在正无穷远处的渐近行为．     

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.     

Ginzburg-Landau方程的周期解

利用伽辽金方法、Leray-Schauder不动点原理和先验估计,证明了在带周期外力扰动和周期边界条件的影响下,非线性发展Ginzburg-Landau方程ut=(λ iα)△u-(k iβ)｜u｜2u γ f的时间周期解,其中,f(t,x)是一个关于时间变量t的以w为周期的函数.此方程具有非线性项｜u｜2u,给周期解的研究带来技术性困难,文章比较系统地解决了这个问题,给Ginzburg-Landau方程的研究作了补充和完善,同时也给与该方程联系的有限振幅不稳定波比如一些流体动力学系统,Rayleigh-Bénard对流等方面的研究带来某些理论上的解释.     

一类非线性双曲方程的局部解

研究如下非线性双曲方程的初边值问题utt-m(‖ u‖22)Δu-γΔut=β｜u｜αu,其中α>0,γ 0,β>0,α,β,γ均为常数.利用Galerkin方法和改进的势井理论:当m(s)和α满足一定的条件,且初值充分小时,证明了该方程局部解的存在性和唯一性.     

一类四阶拟线性椭圆方程解的存在性和多重性

自Lazer和McKenna用非线性分析的方法建立了研究悬桥（suspension bridge）的数学模型后,四阶微分方程备受人们的关注.本文在非线性项满足更弱的条件下,利用极小化作用原理和极小极大方法得到了一类四阶拟线性椭圆方程{△（g1（（△u）2）△u）＋cdiν（g2（｜▽u｜^2）▽u）=f（x,u）x∈Ω,△u=u=0x∈Ω,解的存在性和多重性.     

一类半线性椭圆边值问题解的梯度估计

运用Hopf极值原理讨论了一类具有Dirichlet边界条件u=0的半线性椭圆方程△u＋f（x，u，q）=0（q=｜↓△u｜^2）的解的某个函数的极值原理，利用该结论获得了解的梯度q的估计。     

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.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

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