复合V-ρ不变凸多目标规划最优充分性条件

定义了一类称为复合V-ρ不变凸函数，并将该类广义凸函数应用到非光滑多目标规划问题上；建立了新的充分条件．     

关于“凸函数”定义的评析

本文分析了各公开出版刊物上常见的六种“凸函数”定义。揭示出这些“凸函数”定义并不等价，提出了“凸函数”的统一定义。     

非光滑最优化的充分性条件

该文定义了几类范围更广泛的广义凸函数,推广了杨新民,胡新生等定义的广义凸函数,并且利用这些广义凸函数讨论了非光滑最优化的充分性条件。     

强E-凸集,强E-凸函数和强E-凸规划

在E-凸集与E-凸函数定义的基础上,通过将E-凸集和E-凸函数的定义加强而得到强E-凸集与强E-凸函数的定义.它们的一些特征被讨论.虽然这种定义的条件比E-凸集和E-凸函数的条件更强.但通过这种定义,E-凸规划的条件被减弱了,从而扩大了E-凸规划的实用范围.     

凸函数定义等价性的进一步探讨

凸函数在数学规划,最优化理论、变分不等式等领域中具有十分重要的作用。本文在已有凸函数文献基础上,讨论了凸函数的七种不同形式的定义,这些概念从不同方面刻画了凸函数的特征。为表明这些定义之间的等价性,对各种定义之间的等价性进行了完整的分析和证明,并对凸函数教学提出了进一步的改进与完善。     

几何凸函数的几个定理及其应用

研究几何凸函数与凸函数的之间关系，定义了Schu—几何凸函数，给出判定几何凸函数和schur—几何凸函数的几个定理并举例说明定理的实用性．     

几何凸函数的几个性质

文[1]引入了几何凸函数的定义，并且给出了判定几何凸函数的方法，本文讨论几何凸函数，得到了几何凸函数的一些性质．     

凸函数不同定义间的关系及其应用

本文比较了凸函数不同定义,明确了各种定义之间的强弱关系,等价关系.在文章的最后,对凸函数的定义作了推广并举例说明其应用.     

平方s-凸函数的Hermite-Hadamard型不等式

利用s-凸函数与平方s-凸函数的关系,或者从平方s-凸函数的定义出发,建立了平方s-凸函数的Hermite-Hadamard型不等式.     

平方凸函数的几个性质

文[1]引入了平方凸函数的定义，并研究了平方凸函数的性质，笔者继续讨论平方凸函数，得到了平方凸函数的几个性质．     

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.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

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