关于函数的不可导点

讨论了判定函数不可导点的两个基本方法。特别地，详细讨论了复合函数ｙ的不可导点的判定方法：在下列两种情况之一ｘ０必为的不可导点，１）ｆ（ｕ）在不可导，在ｘ０可导但在ｘ０不可导但连续，且，使在（ｘ０－δ，ｘ０）∪（ｘ０，ｘ０＋δ）。在ｕ０可导但ｆ＇（ｕ０）≠０．并应用上述方法给出了函数｜ｆ（ｘ）｜的有关结论：若ｘ０是ｆ（ｘ）的可导点，则ｘ０是｜ｆ（ｘ）｜不可导，久的充要条件是ｆ（Ｘ０）＝０且ｆ＇（ｘ０）≠０；若ｘ０是ｆ（ｘ）的不可导点，则ｘ０是｜ｆ（ｘ）｜的不可导点的充分条件是ｆ（ｘ０）＝０或ｆ（ｘ）在ｘ０点连续。     

关于B－D算子的导数对有界变差函数的逼近

研究了Ｂｅｒｎｓｔｅｉｎ－Ｄｕｒｒｍｅｙｅｒ算子Ｄｎ（ｆ，ｘ）的导数Ｄｎ＇（ｆ，ｘ）对区间［０，１］上的有界变差函数ｆ’的逼近，给出了｜Ｄｎ’（ｆ，ｘ）－（ｆ’（ｘ＋）＋ｆ’（ｘ－））／２｜的误差估计，证明了本文所得到的收敛阶是不能改进的。     

Banach空间微分方程初值问题弱解的一个存在性定理

在弱耗散型条件ｌｉｍ／ｈ→０＾－１／ｈ［｜ψ（ｘ－ｙ＋ｈ（ｆ（ｔ，ｘ）－ｆ（ｔ，ｙ）））｜－ψ（ｘ－ｙ）｜］≤ｇ（ｔ，｜ψ（ｘ－ｙ）｜）下给出了Ｂａｎａｃｈ空间常微分方程初值问题弱解的一个存在性定理。     

关于乘积空间上的Marcinkiewicz积分

该文给出了如下定义乘积空间Ｒｎ×Ｒｍ上一类带粗糙核的Ｍａｒｃｉｎｋｉｅｗｉｃｚ积分算子μΩ，ｂ（ｆ）的Ｌ２（Ｒｎ×Ｒｍ）有界性：μΩ，ｂ（ｆ）（ｘ，ｙ）＝（∫∞０∫∞０｜Ｆｂ，ｔ，ｓ（ｘ，ｙ）｜２ｄｔｄｓｔ３ｓ３）１／２，这里，Ｆｂ，ｔ，ｓ（ｘ，ｙ）＝｜ｘ－ｕ｜≤ｔ｜ｙ－ｖ｜≤ｓΩ（ｘ－ｕ，ｙ－ｖ）ｂ（｜ｘ－ｕ｜，｜ｙ－ｖ｜）｜ｘ－ｕ｜ｎ－１｜ｙ－ｖ｜ｍ－１ｆ（ｕ，ｖ）ｄｕｄｖ，且Ω为原子Ｈａｒｄｙ空间Ｈ１ａ（Ｓｎ－１×Ｓｍ－１）中的函数，ｂ为空间ｌ∞（Ｌｑ（Ｒ＋×Ｒ＋）中的径向函数     

图的循环带宽的Harper型下界

设Ｇ为具有ｎ个顶点的图，Ｚｎ为模ｎ整数加群。从Ｇ的顶点集到Ｚｎ的任一双射ｆ称为Ｇ的一个循环标号。ｆ的循环带宽Ｂｃ（Ｇ，ｆ）定义为ｍａｘｄ（ｆ（ｕ），ｆ（ｖ），其中对任意ｘ，ｙ∈Ｚｎ，ｄ（ｘ，ｙ）＝ｍｉｎ｛｜ｘ－ｙ｜，ｎ－｜ｘ－ｙ｜｝。     

积域上带粗糙核的Marcinkiewiez积分

本文给出了如下定义的乘积空间Ｒｎ×Ｒｍ上一类带粗糙核的Ｍａｒｃｉｎｋｉｅｗｉｅｚ积分算子μΩ（ｆ）的Ｌ２（Ｒｎ×Ｒｍ）有界性：μΩ（ｆ）（ｘ，ｙ）＝（∫∞０∫∞０｜Ｆｔ，ｓ（ｘ，ｙ）｜２ｄｔｄｓｔ３ｓ３）１２，这里Ｆｔ，ｓ（ｘ，ｙ）＝｜ｘ－ｕ｜≤ｔ｜ｙ－ｖ｜≤ｓΩ（ｘ－ｕ，ｙ－ｖ）｜ｘ－ｕ｜ｎ－１｜ｙ－ｖ｜ｍ－１ｆ（ｕ，ｖ）ｄｕｄｖ且Ω（ｘ′，ｙ′）为文献［８］中建立的积域Ｓｎ－１×Ｓｍ－１上的一类ｂｌｏｃｋ－空间中的函数。这一结果是这类带粗糙核的积分算子在单参数下ｐ＝２时结果的改进和扩充。     

极大算子的加权模不等式一种记注

本文给出了加权模不等式成立：∫Ｒ＾ｎ｜Ｍｆ（ｘ）｜＾ｐｗｄｘ≤Ｃ∫Ｒ＾ｎ｜ｆ（ｘ）｜＾ｐｗ（ｘ）ｄｘ     

关于函数y＝｜x｜类属的商榷

针对对函数ｙ＝｜ｘ｜类属的欠妥认识，提出该函数是初等函数，进而得到：若ｙ＝ｆ（ｘ）是初等函数，则ｙ＝｜ｆ（ｘ）｜也是初等函数；说“分段函数都是非初等函数”是欠妥的     

关于一种修正的Jacobi多项式

以修正的Ｊａｃｏｂｉ多项式算子的零点作为插值的节点,构造了一个“１／１６”平均插值过程Ｃｎ（ｆ,ｘ）．若ｆ（ｘ）∈Ｃｊ［－１,１］,０≤ｊ≤３,则Ｃｎ（ｆ,ｘ）对ｆ（ｘ）的逼近程度达到最佳,结论为｜Ｃｎ（ｆ,ｘ）－ｆ（ｘ）｜＝Ｏ１ｎｊ＋１＋１ｎｊωｆ（ｊ）,１ｎ（０≤ｊ≤３）｜Ｃｎ（ｆ,ｘ）－ｆ（ｘ）｜＝Ｏωφλｆ,１ｎδｎ（ｘ）１－λ（０≤λ≤１）     

广义Calderón-Zygmund算子的一个权模不等式

本文证明了如下的广义Ｃａｌｄｅｒóｎ－Ｚｙｇｍｕｎｄ算子的一个权模不等式∫Ｒｎ｜Ｔｆ（ｘ）｜ｐｗ（ｘ）ｄｘ≤Ｃ∫Ｒｎ｜ｆ（ｘ）｜ｐＭ［ｐ］＋１ｗ（ｘ）ｄｘ其中Ｔ是θ（ｔ）型Ｃａｌｄｅｒóｎ－Ｚｙｇｍｕｎｄ算子,Ｍｋ是取ｋ次Ｈａｒｄｙ－Ｌｉｔｌｅｗｏｏｄ极大算子,［ｐ］是ｐ的整数部分,１＜ｐ＜＋∞．同时也证明了如下的结果：ｗ（｛ｘ∈Ｒｎ∶｜Ｔｆ（ｘ）｜＞λ｝）≤Ｃλ∫Ｒｎ｜ｆ（ｘ）｜Ｍ２ｗ（ｘ）ｄｘ     

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     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

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