Peano曲线的推扩

定理1　存在连续映射:f,f:E1→E2满足,f(E1)=E2.定理2　ACE1f是连续单调映射f:A→E1满足:supx∈A{f(x)}=Mimfx∈A{f(x)}=N则f连续扩充到E1上.     

线段上连续自映射混沌现象的充分条件

2002年赵勇提出了线段连续自映射混沌现象的几个充分条件,本文在此基础上,用分析的方法根据ω-极限轨迹的特点将其分为各种情况,得到了线段连续自映射混沌现象的两个充分条件.即设f为线段I上的一个连续自映射,x∈ω(f)-P(f),若存在mi∈N(当I→ ∞时mi→ ∞),使得,fmi 3(x)＜fmi(x)＜fmi 2(x)＜fmi 1(x),则f在I是混沌的和设f为线段I上的一个连续自映射,x∈ω(f)-P(f),若存在mi∈N(当I→ ∞时mi→ ∞),使得fmi 3(x)＞fmi(x)＞fmi 2(x)＞fmi 1(x)则f在I是混沌的,进一步揭示混沌现象的本质.     

D~*-度量空间中广义F-压缩条件下的不动点定理

在完备D~*-度量空间的框架下,首次提出F-压缩映射和广义F-压缩映射的概念,然后使用不同的方法分别在这2种压缩条件下对自映射的不动点的存在性和唯一性进行研究并给出几个新的不动点定理,所得结果在很大程度上改变了已有文献的相关结果.     

关于非自伴算子 D~2x~αD~2+x~β+ix~γ的极限点类

关于四阶自伴算子在什么情况下是极限点的问题已经有了不少讨论。1977年 R.Kauff-man 证明了一切形如D~2p_0(x)D~2-Dp_1(x)D+p_2(x)的四阶自伴算子都是极限点的,其中 p_0(x),p_1(x),p_2(x)是[1,∞)上首项系数大于0的实系数实幂多项式,即p_i(x)=c_ix~(n(i))+低阶项 (i=0,1,2)c_i≥0,n(i)为实数这里起作用的只是那些首项。本文将利用 Kauffman 的方法讨论非自伴算子 D~2x~αD~2+xβ+ix~γ的极限点类。因为这个算子的实部与虚部都是极限点的,所以我们推测它本身应当也是极限点的。这个推测大致上不错,我们可以证明在绝大多数情况下这个非自伴算子都是极限点的,但有极少数例外,能找到某些反例。     

带有非局部积分边值的Hadamard型分数阶微分包含解的终结点型存在性定理

利用多值映射的不动点定理,给出了以下带有非局部积分边值Hadamard型分数阶微分包含解的终结点型存在性定理:{Dαx(t)∈F(t,x(t)),1te,1α≤2,x(1)=x(0),A/Γ(γ)∫η1(logη/s)γ-1x(s)/s ds+Bx(e)=c,γ0,1ηe},其中D~α表示Hadamard型分数阶导数,F:[1,e]×R→P(R)是多值映射,A,B,c是常数。所得结果将已有的单值结果推广到多值情形。     

复合泛函方程的稳定性

研究了复合泛函方程T(T(x)-T(y))=T(x+y)+T(x-y)-T(x)-T(y)在泛函Φ(x,y)限制下的稳定性问题.证明了:若E为Banach空间,泛函Φ:E×E→[0,∞)连续使得级数Φ(x)d=sum (2-j-1Φ(2jx,2jx)) from j=1 to ∞在E的任一有界子集上一致收敛,F:E→E是连续映射且满足‖F(F(x)-F(y))-F(x+y)-F(x-y)+F(x)+F(y)‖≤Φ(x,y)(■x、y∈E),则存在唯一的连续2-齐次映射T:E→E满足以上复合泛函方程且‖T(x)-F(x)‖≤Φ(x),■x∈E.     

矩阵的г逆与约束的线性方程组

把D~■看成Γ(=D~■环,定义A∈D~(mxn)的Γ广义逆.对于约束线性方程组Ax=b,x∈S,A的关于S上正交射影子P的Γ逆A_P~+起着通常广义逆对于线性方程组所起的类似的作用.     

一致凸Banach空间中集值系解的存在性定理

本文应用集值映射的不动点理论,得到了如下结果: 定理1 设 (1)E是一致凸Banach空间X的非空有界闭凸子集; (2)F是E×E→2~E的闭映射且F(E×E)为相对紧集; (3)映射G:E×E→CCB(E)满足条件ⅰ)G(x,y)对x连续,且关于x对y一致连续; ⅱ)存在满足下述条件的函数φ,“φ是〔0,∞)到〔0,∞〕的非减,上半连续函数,且对t>0,有limφ~n(t)=0”,使对任意x,y_1,y_2∈E,成立     

关于函数严格单调性的一个注记

对于几乎可导的连续函数,给出了严格单调的一个充要条件,证明了定义在区间D上的几乎可导函数f(x)严格递增(严格递减)当且仅当f’(x)在D上几乎非负(几乎非正),且D~+(D~-)是D的调子集,其中D~+={x∈D:f'(x)>0}(D~-={x∈D:f'(x)<0})。这改进了有关函数严格单调性的一些结果。     

有界时滞分数阶微分方程解的存在性

考虑有界时滞分数阶泛函微分方程初值问题D~α(x(t)-g(t,x_t))=f(t,x_t),x_(t_0)=φ,t_0≥0,通过构造全连续算子,利用Schauder不动点定理,获得了解存在的充分条件,其中D~α是α(0α1)阶Caputo导数.     

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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