复合求积公式与Romberg算法

首先导出复合梯形公式，复合Simpson公式和复合Cotes公式，然后指出它们的关系式，由此再导出Romberg算法，另外用Taylor公式导出复合Simpson公式，最后给出误差估计式和数值例子。     

经典组合一公式及其应用

经典组合学上有三个著名的公式，即Ｎｅｗｔｏｎ公式、Ｗａｒｉｎｇ公式以及唐华公式，本文在三公式的基础上重新提出另一公式，不仅使它们的关系更完善，同时还对美国《数学评论》杂志上一个错误报道加以修正。     

Fubini定理公式数计数和Ф（n，k）卷积公式

组合数学中．Catalan效有显式公式，Fubini定理公式效无显式公式，本利用完全图Kn的k个分支的完全分支覆盖的个数N(Kn,k)=S(n,k)(第二类Stirling数)和卷积公式，作将导出Fubini定理的公式效的显式公式，此外获得完全i-部图所有个数基数公式。本中提出Ф(n，k)概念。并讨论Ф(n，k)的组合卷积公式，最后证明Ф(n)=n∑k=1Ф(n，k)与Fubini公式效之间的关系等式.     

现有WACC计算公式的理论缺陷和估值偏差

一个简单的例子揭示了现有的加权平均资本成本（WACC）计算公式违背了价值的可加性原理．基于无套利假设，给出了WACC的精确公式．对比分析发现：在极端情形下，现有公式和精确公式具有相同的结果；在一些较强的条件下，现有公式是精确公式的合理近似；而在一般情形下，现有公式具有较大的系统性正向偏差．基于模拟分析结果，给出了两个公式的使用建议．     

二阶三点数值微分公式的外推算法

利用Taylor公式，给出了二阶三点数值微分公式在各点的截断误差的渐近展开式，并利用Richardson外推算法，提高二阶三点数值微分公式的收敛阶数，得到高精度的二阶数值微分公式．     

辛甫生公式余项“中间点”的渐进性及其应用

通过对辛甫生公式余项的研究，给出了辛甫生公式余项“中间点”的渐进性定理，利用此定理得到了一个改进的辛甫生公式.数值实例表明，改进的辛甫生公式比直接利用辛甫生公式能达到更高的精度.     

推移质对水流阻力影响的定量研究

从挟带推移质的水流能量平衡方程出发，引入Meyer-Peter和Muller推移质输沙率公式，推导了挟带推移质的动平整床面阻力系数公式，实测资料对公式验证的结果表明，该公式具有一定的精度，可用于实际问题的计算。     

编织电缆屏蔽的一个新分析模型

由于编织电缆屏蔽的特殊结构．计算其转移阻抗及内，外表面阻抗时，不能直接用 屏蔽层为圆管的Ｓｃｈｅｌｋｕｎｏｆｆ公式。新提出的编织电缆屏蔽层的简化模型，推导出转 移阻抗的扩散项Ｚｄ和内、外表面阻抗的公式，公式与Ｓｃｈｅｌｋｕｎｏｆｆ的公式不同，其中 Ｚｄ的公式与Ｖａｎｃｅ经过试验验证提出的公式一致。     

FRP约束混凝土圆柱体极限受压强度及其应变计算公式

通过对国内外共341个实验数据的研究，分析了FRP约束混凝土圆柱极限受压强度及应变公式，分析结果认为强度公式和应变公式均呈现出较好的线性关系，可以用线性公式表示，并对线性关系中的k值重点做了分析比较，分析了不同作者k值不同的原因，并提出了相关公式。     

玻耳兹曼分布定律在经典物理化学中的应用

应用玻尔兹曼分布定律证明了范特霍夫渗透压公式、开尔文公式、胶体粒子沉降平衡公式等与粒子在外力场中分布有关的基本公式，模型清晰，方法便捷。     

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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