Durrmeyer－Bernstein多项式的导数与函数的光滑性

本文研究Ｄｕｒｒｍｅｙｅｒ－Ｂｅｒｎｓｔｅｉｎ多项式Ｄ＿ｎ（ｆ；ｘ）的导数与函数ｆ的光滑性之间的关系，即其中ｆ∈Ｃ［０，１］，０＜ａ≤１，０＜β≤２，Ｍ＿１，Ｍ＿２，Ｍ＿３，Ｍ＿４为正常数．     

关于亚纯函数族的两个正规定则

本文证明了两个正规定则：（ｉ）设Ｍ为区域Ｄ内的亚纯函数族，ａ０（ｚ），…，ａｋ－１（ｚ）为Ｄ内ｋ个全纯函数。若，ｆ的每个零点之级≥ｍ，而ｇ（ｚ）－ｂｊ（ｊ＝１，２；ｂ１，ｂ２∈Ｃ＼｛０｝，ｂ１≠ｂ２）的每个零点之级分别≥ｎｊ，这里ｇ（ｚ）…＋ａ０（ｚ）ｆ（ｚ），并且（ｋ＋１），则Ｍ在Ｄ内正规。（ｉｉ）设Ｆ为区域Ｄ内的全纯函数族，为给定的常系数多项式，ｎ≥１。若有ｆ＇Ｐ（ｆ）在Ｄ内不取１，则Ｆ在Ｄ内正规。     

一类新算子的同时逼近

引入一种新的正线性算子并研究它对于无界函数的同时逼近.设ｆ∈Ｃβ[０，∞），ｒ∈N，ｆ（ｘ）在[０，∞）存在ｒ阶导数，则ｌｉｍｎ∞Ｍ（ｒ）ｎ，α（ｆ（ｔ），ｘ）＝ｆ（ｒ）（ｘ）；若ｆ（ｒ）（ｘ）∈Ｃ（ａ－η，ｂ＋η）（η＞０），则Ｍ（ｒ）ｎ，α（ｆ，ｘ）ｆ（ｒ）（ｘ）在ｘ∈[ａ，ｂ]一致成立.设ｆ∈Ｃβ[０，∞），ｆ（ｘ）在[０，∞）上存在ｒ＋２阶导数，则ｌｉｍｎ∞ｎ[Ｍ（ｒ）ｎ，α（ｆ，ｘ）－ｆ（ｒ）（ｘ）]＝α[ｒ（ｒ＋１）ｆ（ｒ）（ｘ）＋（２（ｒ＋１）ｘ＋ｒ）ｆ（ｒ＋１）（ｘ）＋ｘ（１＋ｘ）ｆ（ｒ＋２）（ｘ）]；若ｆ（ｒ＋２）（ｘ）∈Ｃａ－η，ｂ＋η）（η＞０），则上式在[ａ，ｂ]一致成立.     

独立数和最小度与f—因子

对图存在ｆ－因子涉及到独立数和最小度条件进行了研究，得到了下列结果：设ａ，ｂ为整数且ｈ≥ａ１，ｂ≥２，Ｇ是一个有ｎ个顶点的连通图且ｎ≥（ａ＋ｂ）＾２／ａ，ｆ（ｘ）是定义在Ｖ（Ｇ）上的非负整数函数，满足Σｘ∈ＶＧ）ｆ（ｘ）是偶数且α≤ｆ（ｘ）≤ｂ。     

具有三个CM公共值集的亚纯函数

建立了具有三个特定类型的ＣＭ公共值集的两个亚纯函数之间的关系,得到如下结果：设判别有限复数ａ１,ａ２,ｂ１,ｂ２满足ａ１＋ａ２＝ｂ１＋ｂ２,ａ１ａ２≠ｂ１ｂ２．如非常数亚纯函数ｆ与ｇ以｛ａ１,ａ２｝,｛ｂ１,ｂ２｝,及｛∞｝为ＣＭ公共值集,则ｆ与ｇ必满足如下关系之一：（ｉ）ｆ≡ｇ;（ｉ）ｆ＋ｇ≡ｃ;（ｉｉ）ｆ－ｃ２ｇ－ｃ２≡±ａ１－ａ２２２;（ｉｖ）（ｆ－ａｊ）（ｇ－ａｋ）≡（－１）ｊ＋ｋ（ａ１－ａ２）２（ｊ,ｋ＝１,２）;（ｖ）（ｆ－ｂｊ）（ｇ－ｂｋ）≡（－１）ｊ＋ｋ（ｂ１－ｂ２）２（ｊ,ｋ＝１,２）．其中ｃ＝ａ１＋ａ２．     

C*-代数中两个正定元的谱几何平均

引入并研究了Ｃ＊－代数中两个正定元ａ与ｂ的谱几何平均ｆ（ａ，ｂ），给出了ｆ（ａ，ｂ）的各种表达形式和它的一系列重要性质．特别证明了：ｆ（ａ，ｂ）是ａ与ｂ的对称函数；ｆ（ａ，ｂ）的谱σ（ｆ（ａ，ｂ））等于σ（ａｂ）的平方根；当ａ与ｂ交换时，ｆ（ａ，ｂ）是ａｂ的平方根     

次微分中值定理

次微分中值定理陶常利（泰安师专数学系）本文旨在把微分中值定理推广到单侧导数及对称导数上去。类似于Ｒｏｌｌｅ中值定理，我们有下面的引理１设ｆ（ｘ）∈Ｃ［ａ，ｂ］且在（ａ，ｂ）内存在右导数，若ｆ（ａ）＝ｆ（ｂ），则存在ξ＿１，ξ＿２∈（ａ，ｂ）使得下面的...     

C^＊—代数中两个正定元的谱几何平均

引入并研究了Ｃ＾＊－代数中两个正定元ａ与ｂ的谱几何平均ｆ（ａ，ｂ），给出了ｆ（ａ，ｂ）的各种表达形式和它的一系列重要性质，特别证明了；ｆ（ａ，ｂ）ａ与ｂ的对称函数；ｆ（ａ，ｂ）的谱σ（ｆ（ａ，ｂ））等σ（ａｂ）的平方根；当ａ与ｂ交换时，ｆ（ａ，ｂ）是ａｂ的平方根。     

一致分子格及其性质

对分子格Ｌ上的自映射ｆ：Ｌ→Ｌ，提出了一种新的映射道ｆ－１：Ｌ→Ｌ，其中，对任意Ｌ中的元ａ，ｆ－１（ａ）＝∨｛ｂ∈Ｍ（Ｌ）｜ａ∧ｆ（ｂ）≠０｝．借助于此，引入了分子格上的一种对称的一致结构，证明了一个拓扑分子格（Ｌ，η）可一致化当且仅当它是全正则分子格．     

一类二阶四点边值问题的可解性

借助Ｌｅｒａｙ－Ｓｃｈａｕｄｅｒ非线性抉择，证明了二阶四点边值问题ｘ＂＝ｆ（ｔ，ｘ，ｘ′），ａ＜ｔ＜ｂ，ｘ（ａ）＝ｘ（ｃ），ｘ（ｄ）＝ｘ（ｂ）（ａ＜ｃ≤ｄ＜ｂ）的一个存在性定理     

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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