带不同密度的非线性奇异积分方程组的可解性

在Ａ．И．ГｙｃｅЙНＯＢ等工作的基础上提出了并讨论带有不同密度的非线性奇异积分方程组的可解性。通过构造与之可解性相同的每个方程只有一个密度的方程组,证明了对给定的广义Ｈｏｅｌｄｅｒ空间Ｈｋ１,ｋ２（ω１,ω２,ω）在存在常数λ０当│λ│≤λ０时方程组可解。     

二阶复合型偏微分方程的函数论方法

本文讨论二阶复合型方程组（ＣＥ２）：１００１２ｔ２＋１００λ／Ｒ２２ｘ２１＋０（λ－ｋ２）／ｋ２（λ－１）／ｋ０２ｘ１ｘ２＋λ００１２ｘ２２ｕ１ｕ２＝０（０＜ｋ＜１，λ＜０）得到了该方程组有解的必要条件，并由此知道该方程组的Ｃａｕｃｈｙ问题是不适定的，转而讨论问题（Ｄ２），证明了问题（Ｄ２）是可解的，并给出了解的表达式     

二阶复方型偏微分方程的函数论方法

本文讨论二阶复合型方程组（ＣＥ２）：［（１０１０）δ＾２／δｔ＾２＋（１０１λ／Ｒ＾２）δ＾２／δｘ１＾２＋（０（λ－ｋ＾２）／ｋ＾２（λ－１）／ｋ０）δ＾２／δｘ１δｘ２＋（λ００１）δ＾２／δｘ２＾１］（ｕ１ｕ２）＝０得到了该方程组有解的必要条件，并由此知道该方程组的Ｃａｕｃｈｙ问题是不适定的，转而讨论问题（Ｄ２），证明了问题（Ｄ２）是可解的，并给出了解的表达式。     

一阶椭圆型方程组的某类边值问题

研究一阶椭圆型方程组的某类边值问题，得到了问题的Ｎｏｅｔｈｅｒ性指标，并给出了问题的线性无关解个数ｋ_０和可解性条件的个数ｌ_０的估计式：（Ｋ＋ｋ＇）ｒ≤ｋ_０≤（Ｋ＋ｋ＇）ｒ，（Ｋ＋ｌ＇－１）ｒ≤ｌ_０≤（ｋ＋ｌ＇）ｒ。     

双解析函数的黎曼－希尔伯特问题

讨论了双解析函数的黎曼－希尔伯特问题（ＲＨ问题）：寻求方程的解，要求它满足边界条件：这里，λ（ｔ），γｉ（ｔ），ｉ＝１，２是给定的Ｈ类函数，λ（ｔ）≠０，不失一般性，可以认为｜λ（ｔ）｜＝１．对于指数ｘ的不同情况我们分别得到了双解析函数黎曼－希尔伯特问题的可解性定理。     

Aaskakov—Kantorovich算子点态逼近

通过构造了一个新的算子，利用光滑模ω＾２φλ（ｆ，ｔ）（０≤λ≤１）和ω＾１（ｆ，ｔ）研究了Ｂａｓｋａｋｏｖ－Ｋａｎｔｏｒｏｖｉｃｈ算子的点态逼近，得到了一个等价定理，统一了以前Ｄｉｔｚｉａｎ－Ｔｏｔｉｋ模和古典光滑模的结果。     

一类复合边值问题的可解性

一类复合边值问题的可解性李生训仇计清河北科技大学基础部，０５００１８，石家庄关键词非线性椭圆型复方程组，复合边值问题，先验估计，可解性分类号（中图）Ｏ１７５．２５，Ｏ１７５．２９；（１９９１ＭＲ）３５Ｋ５０不妨设Ｄ为单位圆内的Ｎ＋１连通圆界区域，其边...     

图的第二个最小特征值的界

设Ｇ是ｎ个顶点的简单图，λｎ－１（Ｇ）为Ｇ的第二个最小特征值。Ｇ的非孤立点形成的图记为Ｇ１，Ｖ（Ｇ１）＝ｓ，（３≤ｓ≤ｎ）。本文主要证明了：ａ．若Ｇ１不是完全偶图，则λｎ－１（Ｇ）≤λｓ－１（Ｋ２，ｓ－２＾－ｅ），等式成立＝Ｇ１≌Ｋ２，ｓ－２＾－＾ｅ。其中图Ｋ２，ｓ－２＾－＾ｅ为完全偶图Ｋ２，ｓ－２去掉一边ｅ而得到的图ｂ．若Ｇ１既不是完全偶图，又不是Ｋ２，ｓ－２＾－ｅ，则λｎ－１（Ｇ）＜－√２／２     

凸度量空间上的一个不动点定理

设Ｘ为具有性质（Ｃ）和（Ｐ）的凸度量空间，Ｋ是Ｘ的非空凸子集，ＴＫ→２Ｘ使得ｘ→ｄ（ｘ，Ｔｘ）是１．ｓ．ｃ．若ｉｎｆ｛ｄ（ｘ，Ｔｘ）｜ｘ∈Ｋ｝＝０，且ｘ，ｙ∈Ｋ，λ∈［０，１］，ｕ＝Ｗ（ｘ，ｙ，λ）有ｄ（ｕ，Ｔｕ）≤Φ（ｍａｘ｛ｄ（ｘ，Ｔｘ），ｄ（ｙ，Ｔｙ）｝）．这里ΦＲ＋→Ｒ＋满足条件Φ（０）＝０，在０的右边不减和连续，则Ｔ在Ｋ上有不动点．它推广了Ｔ．Ｈ．Ｃｈａｎｇ和Ｃ．Ｌ．Ｙｅｎ（１９８９）在Ｂａｎａｃｈ空间中的结果     

一类抛物型方程组解的渐近收敛性

一类抛物型方程组解的渐近收敛性邢家省（东南大学数学力学系，南京２１００１８）１问题的提出设是有界区域，其边界光滑．考虑如下一类抛物型方程组的初边值问题其中，常数ｄ１＞０，ｄ２＞０；ｍ≥１，ｎ≥１；ｋ１＞０，ｋ２＞０；ｖ是上的单位外法向量．方程组（１）...     

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