可分离变量奇异非线性Sturm-Liouville问题的正解

本文考察了如下情形奇异非线性Sturm-Liouville问题-(Lφ)(x)=h(x)f(φ(x)),0＜x＜1,R1(φ)=α1φ(0) β1φ′(0)=0,R2(φ)=α2φ(1) β2φ′(1)=0,的正解情况,并给出了相应的例子.其中,(Lφ)(x)=(p(x)φ′(x))′ q(x)φ(x),p(x)∈C1[0,1],p(x)＞0,q(x)∈C[0,1],q(x)≤0;α1,α2,β2≥0,β1≤0不但允h(x)许在x=0,x=1处奇异,而且允许f(s)在s=0处奇异.     

Banach空间中关于一致Lipschitzian映象的一个新结果

设E是一实Banach空间,K为E中的一非空闭凸子集,Ti:K→K,i=1,2,3为一致Lipschitzian连续映象.如果序列kn(∩)[1,∞),kn→1,{αn}、{βn}、{δn}∈[0,1],满足:(i)δn→1(n→∞);(ii)∑∞n=0αn=∞,∑∞n=0βn=∞;(iii)∑∞n=0α2n＜∞,∑∞n=0αnβn＜∞;(iv)∑∞n=0αn(kn-1)＜∞,对x0∈K,让{xn}满足以下迭代序列xn+1=(1-αn)xn+αnT n1ynyn=(1-βn)xn+βnT n2znzn=(1-δn)xn+δnT n3xn,如果存在严格增的函数φ:[0,∞)→[0,∞),φ(0)=0,使得对(A)j(x+y)∈J(x+y),x∈K(i=1,2,3)有〈T nix-x*,j(x-x*)〉≤kn||x-x*||-(ψ)(||x-x*||),则{xn}收敛于x*.文章主要结果推广了张石生教授最近文献[1,8]以及文献[6-7]等的主要结果.     

φ-Hilfer分数阶共振边值问题解的存在性

用Mawhin的重合度理论研究共振情形下φ-Hilfer分数阶Riemman-Stieltjes积分边值问题■解的存在性,其中n-1<α≤n, 0≤β≤1,γ=α+nβ-αβ,n=1,2,…,φ∈Cⁿ[0,1]且φ′(t)>0于[0,1],A(t)是一个有界变差函数.结果表明,在合适的Banach空间中,φ-Hilfer分数阶微分方程在Riemman-Stieltjes积分边界条件下的解存在.     

二阶m点边值问题的可解性

设f：[0,1]×R^2→R满足Caratheodory条件,（1-t）e（t）∈L^1[0,1],0〈ξ1〈ξ2〈…ξm-2〈1,本文运用Leray-Schauder不动点定理来考虑m点边值问题 x″（t）=f（t,x（t）,x（t））,＋e（t）,t∈（0,1）,α0x（0）＋α1x（0）=0,x（1）=∑i=1^m-2βix（ξi）,C[0,1]∩C^1[0,1）解的存在性。     

可分离变量奇异非线性Sturm-Liouville问题的正解

本文考察了如下情形奇异非线性Sturm-Liouville问题-(Lφ)(x)=h(x)f(φ(x)),00,q(x)∈C[0,1],q(x)≤0;α1,α2,β2≥0,β1≤0不但允h(x)许在x=0,x=1处奇异,而且允许f(s)在s=0处奇异。     

关于m-增生算子方程解的迭代逼近问题的注释

设E是实一致光滑Banach空间,T：E→E是m-增生算子,且对任意x,y∈E,有∥Tx-Ty∥≤L(1 ∥x-y∥),其中L≥1。假设{un}n=0^∞,{vn}n=0^∞为E中序列,{αn}n=0^∞,{βn}n=0^∞为[0,1]中实数列且满足某些条件,则Ishikawa迭代序列{xn}n=0^∞强收敛于方程x Tx=f的唯一解。     

关于哈尔条件的一点注记

本文在深入剖析哈尔(Haar)条件基础之上,应用实对称正定矩阵的性质,给出了结论,若φ(x),φ1(x),…,φn(x)∈C[a,b]在{xi,i=0,1,…,m}上满足哈尔(Haar)条件,则法方程(6)的系数矩阵(7)(见下文)非奇异,这是一种简洁易懂的证明方法.     

多项式乘积逼近的中间系数函数的可微性

对于每个固定的ｙ∈[０,１]，定义Ｆｙ（x)∈C[０，１]为Fy(x)=F(x,y),且Ｆy(x)在[0,1]上的最佳一致逼近为 本文给出f_i(y)(i=1,2…,n)在[0,1]上α次连续可微的充分条件,并对一种特殊基给出 的估计式.     

向量值适应序列的弱收敛

引言设(Ω,??,P)是一概率空间,E是Banach空间,E是E的共轭空间,(??_n,n≥1)是??的递坛子σ-代数族.记T和T~f分别为关于(??_n,n≥1)的简单停时和有限停时全体.一个E值随机变量指的是关于??强可测的E值函数.由Pettis可测性定理(见[1]),x是E值随机变量当且仅当x几乎具有可分值(??Ω_0∈??,P(Ω_0)=1,x(Ω_0)是E的可分子     

关于哈尔条件的一点注记

本文在深入剖析哈尔(Haar)条件基础之上,应用实对称正定矩阵的性质,给出了结论,若φ(0x),φ(1x),…,φ(nx)∈C[a,b]在{xi,i=0,1,…,m}上满足哈尔(Haar)条件,则法方程(6)的系数矩阵(7)(见下文)非奇异,这是一种简洁易懂的证明方法.     

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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