关于n维球的体积

综述了n维球的体积已知的几种算法,并且在此基础上给出一种新的算法.类似的这几种算法还被用于计算n维椭球的体积.     

关于n维单形的一个不等式

本文证明了一个关于n维单形的不等式。该不等式刻划出n维单形的棱长与其体积间的关系.     

划分n维单形体积的最小值问题

本文将文[2]划分四面体体积的问题推广到n维单形的情形，得到一个划分n维单形体积最小值的结果。     

n维单形体积的棱长表示及其应用

本文给出了n维欧氏空间E^n中n维单形体积的一个用棱长及棱间夹角表示的公式，并由此得出了用单形的外接球半径和中线表示的体积公式以及几个相关的不等式。     

n维凸模糊集与n维模糊数

在n维模糊集理论的基础上,给出了n维凸模糊集的定义,利用凸模糊集的有关性质研究了n维凸模糊集的有关性质.在此研究基础上,又给出了n维(闭)模糊数的概念,根据模糊数的有关性质得到了n维(闭)模糊数相应的运算性质和表示定理,为建立基于n维模糊集的凸分析理论奠定了基础.     

N维单形中张—杨不等式的稳定性及应用

首先定义了任意两个n维单形之间的一种度量,使得全体n维单形集合成为一个度量空间,在此基础上证明了n维单形中张-杨不等的稳定性.给出了涉及单形的体积,内切圆半径和高的不等式的稳定性.     

高维幻体的存在性

所谓高维幻体是一个元由从1到n~D的n~D个连续自然数所组成的n阶D维方阵,其任一组位于同一行列或D维对角线上的n个元之和均等于幻和:1/2n(1+n~D)。本文给出了三种n阶D维幻体的构造方法,证明了n阶D维幻体是存在的,从而完全解决了高维幻体的存在性问题。这里n≥3,D>2。     

n维球体的若干性质

综述n维球体与其外切圆柱体体积表面积的计算公式,以及它们之间的微分关系、比例关系、递推关系、系数关系、系数性质等若干性质.     

几个n维Euclid空间概念与定理

解析几何中介绍了三维Euclid空间中点、直线、平面的概念及关系,通过把三维Euclid空间中向量的数性积、矢性积与混合积等推广到n维Euclid空间的情形,研究了n维Euclid空间中向量间的关系,以此为基础,推广了点、直线、平面的概念,尤其给出了n维Euclid空间中关于点、直线、平面的几个重要关系定理,为线性规划的几何算法研究打下了理论基础.     

n维单形的Jainc＇ R.R.不等式的稳定性

首先给出了任意2个单形之间的一种度量，使得全体n维单形集合成为一个度量空间,然后证明了涉及n维单形体积和旁切超球半径的Janic＇ R.R.不等式的稳定性.     

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.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

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     

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