关于整除性n｜φ(n) σ(n)

本文证明了：ｉ）当合数ｎ至多只有两个不同的素因子时，ｎφ（ｎ）＋σ（ｎ）；ｉ）若奇合数ｎ满足ｎ｜φ（ｎ）＋σ（ｎ），则ｎ至少有６个不同的素因子，且ｎ≥６５１５５１１５０２５；ｉｉ）在区间［１０７，２·１０７］中有且仅有一个ｎ，即ｎ＝１２５５８９１２，满足ｎ｜φ（ｎ）＋σ（ｎ）．     

关于同余式φ（n）d（n）＋2≡0（mod n）

对于正整数ｎ,设ｄ（ｎ）、φ（ｎ）分别是ｎ的约数函数和Ｅｕｌｅｒ函数．又设Ｓ是全体素数和４的集合．本文证明了：当ｎＳ时,如果ｎ满足同余式φ（ｎ）ｄ（ｎ）＋２≡０（ｍｏｄｎ）,则ｎ必为无平方因数正整数．并且由此推出：如果ｎＳ且ｎ适合ω（ｎ）≤３,当２｜ｎ时,２,当２ｎ时,｛其中ω（ｎ）是ｎ的不同素因数的个数,则ｎ不满足上述同余式．     

关于数论函数若干不等式的一个注记

改进与数论函数σ（ｎ）（整数ｎ的所有正因数的和）及Ｅｕｌｅｒ函数φ（ｎ）有关的几个不等式,并对不等式σ（ｎ）＾φ（ｎ）〈ｎ＾ｎ〈φ（ｎ）＾σ（ｎ）（ｎ∈Ｚ且ｎ≥７）给出了一个较为简便的证明。     

关于同余式nσ(n)≡2(modφ(n))

对于正整数ｎ,设σ（ｎ）、φ（ｎ）分别是ｎ的约数和函数和Ｅｕｌｅｒ函数．复合数ｎ满足同余式ｎσ（ｎ）≡２（ｍｏｄφ（ｎ））,当且仅当ｎ＝４,６或２２．     

采用折叠-展开技术的一种并行排序算法

给出ｎ×ｎ网孔环接式阵列处理机上的一种并行排序算法,它将ｎ×ｎ阵列上的数据折叠成ｎ×ｎ／ｋ子阵列,排序后再展开到整个ｎ×ｎ阵列上,实现ｎ×ｎ项数据的行主序排序,其平均时间复杂度为（２＋１／ｋ）ｎ＋ｏ（ｎ）．若采用ｎ×ｎ／ｋ阵列模型,且各处理器初始、结束状态允许有ｋ项数据时,该算法的平均时间复杂度只有（１＋２／ｋ）ｎ＋ｏ（ｎ）．     

模n－王后问题中的部分n－解（Ⅲ）

记Ｍ（ｎ）为模。棋盘上互不攻击的皇后的最大个数。在本文中，我们证明了当ｇｃｄ（ｎ，６）＝１时，Ｍ（ｎ）＝ｎ；当ｇｃｄ（ｎ，１２）＝２时，Ｍ（ｎ）＝ｎ－１；当ｇｅｄ（ｎ，１２）＝３，４，６，１２时，Ｍ（ｎ）－ｎ－２。最后，给出了Ｍ（ｎ）＝ｎ的三个等价命题。     

方格偶图Bm×n中的圈数

设Ｂ_(ｍ×ｎ)是具有ｍ×ｎ个顶点的方格偶图,ｇ（ｍ,ｎ）表示图Ｂ_(ｍ×ｎ)中不同圈的数目．证明了 ｇ（２, ｎ）＝ ｎ（ ｎ＋ １）／２, ｇ（３, ｎ）／２＝［（１＋√２）（ｎ＋２）＋（１－√２）（ｎ＋２）］／４－ ２（ ｎ－ １）－ ７／２,其中 ｎ＝２,３,４,…     

关于整除│n│ψ（n）＋σ（n）

本文证明了：１）当合数ｎ到多只有两个不同的素因子时，ｎ│ψ（ｎ）＋σ（ｎ），２）若奇合数ｎ满足ｎ│ψ（ｎ）＋σ（ｎ），则ｎ到少有６个不同的素因子，且ｎ≥６５１５５１１５０２５，３）在区间」１０＾７２．１０＾７「中有且仅有一个ｎ，即ｎ＝１２５５８９１２，满足ｎ│ψ（ｎ）＋σ（ｎ）。     

关于Sn的元素的阶的集合

用Ｏ＿ｎ表示ｎ次对称群Ｓ＿ｎ的元素的阶的集合。本文综述Ｏ＿ｎ的两种刻划Ｏｎ＝｛［ｎ＿１，ｎ＿２，…，ｎ＿ｕ］｜ｎ＿ｉ是正整数，且ｎ＿ｉ≤ｎ｝，为互异质数，且与两种求法，并且给出用计算机求得的Ｏ＿ｎ的一些结果。最后，对于Ｏ＿ｎ提出一些问题，以作进一步研究．     

关于同余式nσ（n）≡2（modψ（n））

对于正整数ｎ，设σ（ｎ）、ψ（ｎ）分别是ｎ的约数和函数和Ｅｕｌｅｒ函数。复合数ｎ满足同余式ｎσ（ｎ）≡２（ｍｏｄψ（ｎ）），当且仅当ｎ＝４，６或２２。     

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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