Henon映射周期点分在的混沌区

本文报道了应用ＰＣ机大量迭代计算找到的一个Ｈｅｎｏｎ映射周期点分布的混沌区，以及一些较长周期的周期环，参数取值范围为１．０≤ａ≤１．２，－０．５≤ｂ≤－０．４．根据混沈动力学的理论对所得到的结果进行分析，给出解释．     

解色散方程四点显式差分格式的稳定条件

用代数方法求出了一个分式函数（Ｆｙ，ｐ０，ｐ１，ｐ２）的极大极小值，从而证明了作者原先给出的色散方程中四点显格式的最佳稳定条件为│αΔｔ／ｘ＾３│≤ｍａｘｍｉｎＦ（ｙ，ｐ１，ｐ１，ｐ２）＝２ｐ０＋１／４这里，ｐ１是参数，满足下条条件之一：１，ｐ１／－１／２，ｐ０＝０，Ｐ２〉０ ２．ｐ１≥０，ｐ０＝αｐ１，ｐ２＝βｐ１，α＾２－２β＋２αβ≤０，β≥α〉０ ３．ｐ２＝０，ｐ０＝αｐ１〉０，α〈０，     

二元Szasz－Mirakjan算子的导数与函数的光滑性

讨论二元Ｓｚａｓｚ－Ｍｉｒａｋｊａｎ算子的导数与函数的光滑性之间的关系．得到下列结果：设ｆ（ｘ，ｙ）∈Ｃ（Ｓ），则有（１）０＜α≤１时，的充分必要性条件是ω￣（１）（ｆ；ｈ）≤Ｍｈ￣α．（２）０＜α≤时，的充分必要条件是ω￣（２）（ｆ；ｈ）≤Ｍｈα．（３）０＜β≤２时，的充分必要条件是．（４）０＜β≤２时，的充分必要条件是．这里Ｌ＿ｎ（ｆ；ｘ，ｙ）是二元Ｓｚａｓｚ－Ｍｉｒａｋｊａｎ算子。     

中立型时滞微分方程的一个正解存在定理

本文利用上，下解单调迭代方法，得到了当０≤Ｃ（ｔ）≤１时中立型时滞微分方程［ｘ（ｔ）－Ｃ（ｔ）ｘ（ｔ－ｒ）］′＋ｐ（ｔ）ｘ（ｔ－τ）＝０（１）的正解存在条件．     

关于C^n中具有逐块光滑边界的有界域上含有全纯核的一个…

得到Ｃ＾ｎ中具有逐块Ｃ＾（１）光滑边界的有界域上光滑函数的一个积分公式，这个公式的特点是积分式含有全纯核，且含有一系列实参数ｍ≥２，λ０≥０，λｋ≥０，ｋ∈Ｋ，Ｋ＝（ｋ１，…，ｋ１），１≤ｋ１…〈ｋ１≤Ｎ，它在多复变数的э↑－方程解的积分表示方面有进一步应用。     

只有一个变点模型的跳变度和坡变度的联合分布

对只有一个变点模型ｘ（ｉ／ｎ）＝ｆ（ｉ／ｎ）＋α（ｉ／ｎ），其中，ｆ（ｆｔ）＝「Ｊ１＋Ｓ１（ｔ－ｔ０），０〈ｔ≤ｔ０，Ｊ２＋Ｓ２（ｔ－ｔ０），ｔ０〈ｔ≤１，ε（ｎ／ｎ），…，ε（ｎ／ｎ）独立同分布，Ｊ１，Ｊ２，Ｓ１，Ｓ２，ｔ０为未知参数，讨论了变点ｔ０处，跳变度（Ｊ２－Ｊ１）和坡变度（Ｓ２－Ｓ１）的联合分布。     

一类变系数半线性热方程初值问题解的blow—up问题

本文讨论了初值问题｛δｕ／δｔ－１／ｔΔｕ＝ｕ＾ｒ ｔ〉ε０〉０ ｘ≤Ｒ＾ｎ（０．１） ｕ（ε０，ｘ）＝（ｘ） ｘ∈Ｒ＾ｎ（０．２）其中γ≥１，ψ（ｘ）连续有界，且ψ（ｘ）≥０但不恒为零。我们证明了当１／γ－１≥ｎ／２时，初值问题（０．１）（０．２）的非负解必在有限时间ｂｌｏｗ－ｕｐ。即问题（０．１）（０．２）在１／γ－１≥ｎ／２时没有非负的整体解。     

关于边值问题的某些新结果

考虑如下带不等式约束的一般边值问题：ｘ＾（ｎ）＝ｆ（ｔ，ｘ，…＾＊，ｘ＾（ｎ－１）（０≤ｔ≤１），Ｂｘ＝０，ｘ＾（ｎ－２）≥０。利用基于度理论的一定不动点定理，得到了上述边值问题的某些存在性结果。     

Banach空间的K-凸性模与K-光滑性模

首次对Ｂａｎａｃｈ 空间引进了 Ｋ－ 光滑性模的概念,从而刻划了 Ｋ－ 一致光滑空间的特征．给出了Ｂａｎａｃｈ 空间的 Ｋ－ 凸性模和 Ｋ－ 光滑性模之间的关系,利用这些关系得到如下结果：（ｉ） 一列Ｂａｎａｃｈ 空间｛ Ｘｉ｝ ∞ｉ＝ １ 的ｌｐ － 乘积空间是一致光滑当且仅当对任意ｉ,Ｘｉ 为一致光滑且具有共同的光滑性模;（ｉｉ） 一列Ｂａｎａｃｈ 空间｛ Ｘｉ｝ ∞ｉ＝ １ 的ｌｐ － 乘积空间是 Ｋ－ 一致光滑当且仅当存在 ｎ０ ,当 ｎ ＞ ｎ０ 时,Ｘｎ 为一致光滑且具有共同的光滑性模,当１ ≤ｎ ≤ｎ０ 时,Ｘｎ 为Ｋｎ － 一致光滑且∑ｎ０ｎ ＝ １Ｋｎ ≤ｋ ＋ ｎ０ － １ ．另外,文中还给出了 Ｋ－ 一致光滑空间的一个充分必要条件．特别地,当ｋ ＝ １ 时得到了一致光滑空间的一个新的充分必要条件．最后说明了 Ｋ－ 一致光滑空间具有一致正规结构     

二维渗流临界状态连接函数的幂估计

本文对二维边渗流模型给出了临界状态时连接函数τＰｃ（ｏ，ｖ）的幂估计，即存在常数ａ＞０，Ｃ１＞０，Ｃ２＞０使得Ｃ１｜ｖ｜＾－１≤τｐｃ（ｏ，ｖ）≤Ｃ２｜Ｖ｜＾－ａ，这里ｏ＝（０，０），ｖ＝（ｖ１，ｖ２）∈Ｚ＾２，｜ｖ｜＝｜ｖ１｜＋｜ｖ２｜．     

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