一类具有Z2—等变性质的五次平面哈密顿向量场的全局性质

利用定性分析的方法，研究一类具有Z2－等变性质的五次哈密顿系统，画出了其全局相图。     

一类具有Z3-等变性质的五次哈密顿向量场的全局相图

本章讨论了一类具有Z3-等变性质的五次哈密顿向量场的全局性质，得到了其全局相图，并对参数空间进行了划分．     

一类具有Z_3-等变性质的五次哈密顿向量场的全局相图

本章讨论了一类具有Z3-等变性质的五次哈密顿向量场的全局性质,得到了其全局相图,并对 参数空间进行了划分.     

R~3中一次齐次向量场的切向量场在球面上的轨线全局结构

研究了Ｒ３中一次齐次向量场的切向量场在球面上的轨线全局结构问题，共得出至少８种不同的拓扑等价类，并给出了球面上轨线全局相图．     

一类E33系统的Hopf分支和原点为中心时的全局结构

目的研究了一类E33系统的定性性质。方法运用定性理论和平面系统的分支理论。结果给出了原点O(0,0)为全局中心时的所有可能的全局结构和产生Hopf分支的充分条件。结论得到了关于此类三次系统的比较完整的结果。     

有约束连续全局优化问题的填充函数

求解全局优化问题的填充函数法的关键在于构造一个称为填充函数的辅助函数,给出了一类求解带约束的连续全局优化问题的填充函数,讨论了其填充性质.     

一类E3^1系统的定性分析

目的研究一类三次系统的定性性质。方法利用定性理论并结合平面系统的分支理论。结果给出了原点O(0,0)为全局中心时的所有可能的全局结构和产生Hopf分支的充分条件。结论得到了关于此类三次系统的比较完整的结果。     

一类E13系统的定性分析

目的 研究一类三次系统的定性性质.方法 利用定性理论并结合平面系统的分支理论.结果 给出了原点O(0,0)为全局中心时的所有可能的全局结构和产生Hopf分支的充分条件.结论 得到了关于此类三次系统的比较完整的结果.     

带有Poisson跳的固定资产模型解的全局稳定性

讨论了带有Poisson跳的固定资产模型解的全局稳定性,并给出了固定资产模型稳定性判断准则,该方法的优点是在弱于全局Lipschitz的条件下,讨论了模型解的渐近性质.最后通过数值算例对结论进行了验证.     

R^3中一次齐次向量场的全局拓扑结构

证明了Ｒ＾３中一次齐次向量场Ａｘ延拓到射影空间Ｐ＾３仍然是一次齐次向量场，当且仅当Ａ相似于对角型矩阵，此外，证明Ａｘ在Ｒ＾３中无穷远的流拓扑等价于其切向量场Ａｒ（ｕ１，ｕ２，ｕ３）有单位球面Ｓ＾２上的流；Ａｘ有２６种不同的全局拓扑相图。     

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