三分谢尔宾斯基垫片上的调和函数与双调和函数的算法

在这篇文章中,我们首先介绍了三分谢尔宾斯基垫片和标准拉普拉斯算子;其次,我们推导出了三分谢尔宾斯基垫片上调和函数与双调和函数的算法。图的顶点上这些函数的算法最后得出了预垫片,也就是近似三分谢尔宾斯基垫片。     

C0 半群的最终范数连续性

文章引入定义在Lp（[0，τ]，X）上的有界算子的光滑性质（即Riesz准则），证明了C0半群Tt对t〉t0的最终范数连续性与定义在Lp（[0，τ]，X）上的卷积算子Kf（t）=∫0^tTt＋t0-sf（s）ds具有光滑性质是等价的。     

直觉模糊逻辑算子组与经典算子组之间的关系

文献[1]对经典模糊逻辑“非”、“与”、“或”及“蕴涵”算子进行了系统的研究。文[2]、[3],[4]分别给出了直觉模糊逻辑“非”、“与”、“或”及“蕴涵”算子的定义,并讨论了它们的性质.从而使经典模糊逻辑算子的概念及性质得到进一步的推广。本文在此基础上从代数的观点来讨论 直觉模糊逻辑算子组（D,T,┴,φ,h）与经典模糊逻辑算子组（[0,1],T, ┴,φ,h）之间的关系。     

自相似IFS上概率的不完全规范性

以Lebesgue测度理论为基础,利用所定义迭代函数系（IFS）算子范数：‖fi1i2…in‖=‖fi1i2…in[X]‖=F^k（fi1i2…in[X]）,和不完全规范化理论等相关数学概念,分别研究了低维与高维的自相似IFS上概率的不完全规范性,并以Cantor三分集,Sirpinski垫片为例阐述了其在实际中的应用。     

Meyer-Knig and Zeller算子对有界变差函数的收敛速度

一、引言在1960年Meyer-Kǒnig and Zeller引入一系列线性算子,Cheney和sharma对这些算子作了少许改变,现在仍称为Meyer-Kǒnig and Zeller算子。设D[0,1]是定义在[0,1]上的实函数集,其函数|f(t)|≤A(1-t)~(-α),t∈[0,1)A≥0,α≥0是与f有关的常数,算子M_n在D[0,1)上定义为     

二元Kantorovitch算子在Lp空间中的逼近阶估计

文中给出了二元Kantorovitch多项式算子的表达形式并且通过引进K -泛函这一新的数学概念 ,进一步研究了定义在单纯形上二元Kantorovitch算子的一些性质 ,估计了它在Lp 空间中逼近函数时的收敛速度 ,所得结论推广了文献 [3]和文献 [4 ]中的主要结果。     

关于拉普拉斯算子对李奇曲率张量模长平方的作用

本文研究了拉普拉斯算子对李奇曲率张量模长平方的作用,通过它我们首先讨论了具有调和李奇曲率张量黎曼流形的一些性质,最后利用该方法简洁的证明了文[6]中的一个定理.     

空间L~p（Γ,Σ,μ）（1〈p〈∞）和Banach空间E的单位球面之间等距算子的延拓

文章得到以下结果（它改进了文献[16][18]中的一些结果）：设E是一个赋范空间,V0是单位球面S（Lp（Γ,Σ,μ））到单位球面S（E）内的等距映射。如果V0满足下列两个条件：（ⅰ）对于任意的自然数n,实数ξk∈[-1,1]及χAk∈χ（Γ）,1≤k≤n,有‖sum from k=1 to n ξkμ（Ai）1/pV0〔（χAi）/（μ（Ai）1/p）〕‖p=sum from k=1 to n｜ξk｜pμ（Ai）,（ⅱ）对于任意的f1,f2∈S（Lp（Γ,Σ,μ））和实数ξ1,ξ2∈[-1,1],有‖ξ1V0（f1）＋ξ2V0（f2）‖=1｜ξ1V0（f1）＋ξ2V0（f2）∈V0[S（Lp（Γ,Σ,μ）],那么V0可延拓为全空间Lp（Γ,Σ,μ）上的等距线性算子。     

非连续Sturm-Liouville算子的谱分布及其逆特征值问题

研究了定义在[0,1]区间且在点t0∈(0,1)具有界面条件的Sturm-Liouville算子的特征值与定义在子区间[0,t0]与[t0,1]上的两个Sturum-Liouville算子的特征值分布及其逆特征值问题.利用Weyl-Titchmarsh-m-函数的单调性态,证明了这三组谱之间具有交错性关系,并证明了若子区间上的两组谱不相交,则可由这三组谱唯一确定势函数q(x)与边值条件中的参数h和H.     

Dirichlet空间到Zygmund型空间的一个积分型算子

空间之间算子的有界性及紧性是算子理论的重要组成部分,因此诸多算子理论方向的研究人员对这个问题进行了深刻而系统的讨论.事实上,由于可以讨论的空间很多,算子也不惟一,所以这方面的研究成果一直在不断更新中.基于文献[1-2]中对Zygmund空间及Bloch空间之间积分算子的讨论,并且借鉴了文献[3]中单位球上Dirichlet空间的定义及空间中的函数估计式.给出了单位球上算子Lg:D2→Zμ有界性及紧性的充要条件,结论清晰明了,很容易理解.此外按照同样的方法可以讨论差分Lg-Lh:D2→Zμ有界性及紧性的充要条件,但由于篇幅限制未做出介绍.     

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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