关于Φ扩张相容映象的公共不动点定理

利用度量空间中自映象对相容的条件，讨论了完备度量空间中Φ扩张映象的公共不动点的存在性，推广和统一了已有文献的某些主要结果。     

一类压缩型映象的公共不动点定理

目的为了进一步发展和完善度量空间中的不动点理论,扩展不动点定理的应用范围。方法利用度量空间中自映象对的可交换性条件。结果建立了紧度量空间中3个自映象的公共不动点的存在性和唯一性定理,得到了一个新的公共不动点定理。结论结果表明,在适当的条件下,紧度量空间中的3个两两可交换的自映象存在唯一的公共不动点。     

凸度量空间中非扩张映象的不动点定理

<正> 自1970年Takahashi在度量空间中引入凸结构以来,不少人讨论过具有凸结构的度量空间中映象的不动点定理。本文得出凸度量空间中多值非扩张映象的不动点定理。1 预备定义1设(x,d)是度量空间,I=[0,1]     

一类压缩映象的公共不动点定理

利用度量空间中自映象对相容和次相容的条件,讨论了完备度量空间中一类压缩映象的公共不动点的存在性与唯一性,得到一个新的公共不动点定理.     

完备度量空间中四个映象的公共不动点

利用度量空间中映象对相容的条件，讨论了完备度量空间中四个映象的公共不动点的存在性，推广和统一了已有文献中的某些结果。     

乘积度量空间中两对自映象的公共不动点定理

在乘积度量空间中，利用自映象对的弱交换条件，证明了两对自映象的几个新的公共不动点定理，并且提供了一个支持新结果的实际例子。所得结果改进和推广了Ozavsar和Cevikel的相关结果。     

涉及到四个自映象的一个新的公共不动点定理

利用度量空间中自映象对相容和次相容的条件,讨论了完备度量空间中一类新的ф-压缩映象的公共不动点的存在性与唯一性,得到一个新的公共不动点定理.     

关于Φ-压缩条件下六个映象的公共不动点定理

利用度量空间中自映象对相容和次相容的条件,讨论了完备度量空间中一类Φ-压缩映象的公共不动点的存在性与唯一性,得到了几个新的公共不动点定理.     

一类新的Φ-压缩映象的公共不动点定理

利用度量空间中自映象对相容和次相容的条件,讨论了完备度量空间中一类新的Φ-压缩映象的公共不动点的存在性与唯一性,得到一个新的公共不动点定理.     

锥度量空间中四个自映象的公共不动点定理

利用锥度量空间中自映象对的弱相容性,在放宽了映象的压缩条件下,讨论了一类四个自映象的公共不动点的存在性、唯一性问题.得到了一个新的公共不动点定理,改进并推广了近期的结果.同时也是对度量空间中经典结论的推广.     

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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