C_g空间中无限时滞随机泛函微分方程解的存在唯一性

选取空间Cg为相空间,考察具有无限时滞随机泛函微分方程解的存在唯一性,利用Picard迭代序列、伊藤公式以及Doob鞅不等式,得到了无限时滞随机泛函微分方程的解在区间[t0,∞)上的存在性与唯一性,进而得到了近似解与精确解之间的误差估计,其中t0为正常数.     

非Lipschitz条件下C_h空间中随机泛函微分方程解的存在唯一及其稳定性

研究了Ch空间中无穷时滞随机泛函微分方程,利用Picard迭代法给出了非Lipschitz条件下Ch空间中其解的存在唯一性,借助Bihari不等式的一个推论给出了其解关于初值的连续依赖性.     

带扰动数据的数值微分的中心差分法

本给出了在具有随机扰动数据的情况下,数据微分的中心差分方法,并在Ｌ＾２空间中证明了近似解（正则解）的收敛性,给出了其渐近阶的估计。     

序Banach空间中带⊕算子的广义混合序变分不等式组

在序Banach空间中,引入和研究了带算子的广义混合序变分不等式组.应用序Banach空间理论和矩阵分析方法,给出了其不等式组解的存在性定理,并基于序B-限制增生映象,给出了求解不等式组的迭代算法,迭代序列的收敛性和逼近解.     

Hilbert空间中的集值非线性补问题和非线性补问题

本文讨论了Hilbert空间中的集值非线性补问题和非线性补问題。其主要结论是定理1和定理2。其中定理1给出了在Hilbert空间中集值非线性补问题存在解的一个充分条件。定理2把文〔1〕中的主要结论推广到了一般的Hilbert空间,给出了在Hilbert空间中非线性补问題存在唯一解的充分条件。对于Hilberr空间中的集值非线性补问题和非线性补问題定理1和定理2不但解决了解的存在问题,而且给出了求近似解的一种迭代算法。     

积分-微分方程周期解的存在性(英文)

以(Cg,|.|g)为相空间研究了具有无限时滞积分-微分方程周期解的存在性,利用Schauder-Tychonov不动点定理证明了方程解的g一致有界解有界性和g一致最终有界性蕴含周期解的存在性,推广了已有的一些结论.     

Hilbert空间中Lipschitz单调映像变分不等式解的逼近定理

给出了Hilbert空间中Lipschitz单调映像变分不等式解的迭代格式,证明了其收敛性.作为应用,证明了Hilbert空间中Lipschitz伪压缩映像的强收敛定理,扩展了已知的相关结果.     

指数2非线性广义系统解的稳定性分析

利用固定核空间的投影函数和系统的解空间的结构分解，给出了指数２非线性系统的可处理性，同时分析了其零解的稳定性。     

二阶非线性微分方程Neumann边值问题解的存在性

利用半序理论建立了一个新的比较定理，给出了序Banach空间中二阶非线性微分方程Neumann边值问题在上下解反向给定时其最小解和最大解的存在性。     

一类三阶非线性色散方程的不变子空间和精确解

本文给出了一类三阶非线性色散方程的不变子空间,并通过不变子空间方法构造了方程中一些方程的精确解.由此得到一些方程的尖峰孤子解、紧孤子解和爆破解.     

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     

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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Brief Introduction to “Journal of Jilin University( Science Edition) ”

<正>"Journal of Jilin University(Science Edition)"is a comprehensive academic journal in the fields of science sponsored by Jilin University and administrated by the Ministry of Education of the Peoples Republic of China.The journal started publication in 1955.The original name at starting publication was"Journal of Natural Science of Northeast People University",which was changed into"Acta Scientiarum Naturalium Universitatis Jilinensis"in 1958 owing to the name change of the university.The present journal name has