一类广义分式规划的最优性条件和对偶

函数的广义凸性在数学规划的对偶理论中起着非常重要的作用.针对广义ρ-不变凸性,研究一类广义分式规划及其对偶规划问题.在文献(J.Austral Math.Soc.,1995,A58:376-386.)提出的广义分式规划最优性必要条件的基础上,给出并证明了这类规划的一个最优性充分条件,并针对这类规划提出2个对偶模型,又在适当的条件下,进一步给出并证明这2个对偶规划相应的弱对偶定理、强对偶定理和严格逆对偶定理.     

不变凸性下广义分式规划的最优性条件和对偶

在(p,s)-λ-(ξ,η)-不变凸性的基础上,提出广义λ-(p,ξ,η)-不变凸性的定义;并在此条件下,讨论了一类广义分式规划及其对偶规划定理问题,给出并证明了这类规划的一个最优性充分条件;在适当的条件下,获得了2个对偶规划相应的对偶定理﹒     

一类非凸非线性分式规划的对偶性

对广义不变凸性条件进行推广，引入了几类更为广泛的广义不变凸性概念，并证明了在这几类新广义不变凸性条件下，一类非凸非线性分式规划的弱对偶定理、强对偶定理和逆对偶定理。所得结果涵盖并推广了有关已知的对偶性定理。     

广义分式规划的一个混合型对偶

在函数（F，ρ）－凸性假设下，给出了广义分式规划的一个最优性充分条件和一个混合型对偶，并且在适当的条件下，给出了相应的弱对偶定理，强对偶定理，以及严格逆对偶定理。     

一类非光滑锥约束规划问题的混合对偶

研究了非光滑锥约束规划问题的混合对偶模型的弱对偶、强对偶和逆对偶结果.在K-广义不变凸性、K-广义伪不变凸性条件下证明了两个弱对偶定理;在K-广义不变凸性条件下,利用广义Slater约束规格给出了强对偶定理;在K-非光滑不变凸性和非光滑伪不变凸性下研究了该类模型的逆对偶定理.     

(F,α,ρ,d)-凸性下的非光滑多目标分式规划问题的对偶

在(F,α,ρ,d)-凸性条件下,研究了一类非光滑多目标分式规划问题的对偶问题,给出并证明了该对偶问题的弱对偶定理,强对偶定理和严格逆对偶定理.所得结论改进和推广了相关的结果.     

广义分式规划的混合型对偶

在函数（F,ρ）－凸性假设下,给出了广义分式规划的最优性充分条件及其混合型对偶,并且在适当的条件下,给出了相应的弱对偶定理、强对偶定理,以及严格逆对偶定理。     

广义dⅠ-Ⅴ-Ⅰ型一致不变凸条件下的不可微多目标规划问题

利用d_Ⅰ 不变凸性, 提出一类新的广义d_Ⅰ-Ⅴ-Ⅰ型一致不变凸的概念. 考虑带不等式约束的不可微多目标规划问题, 并在广义d_Ⅰ-Ⅴ-Ⅰ型一致不变凸性条件下, 得到了一些最优性充分条件, 同时建立一个Mond-Weir型对偶, 并证明了弱对偶、 逆对偶和严格对偶定理.     

B-(p,r)-不变凸规划的最优性条件及Wolfe型对偶

B-(p,r)-不变凸函数是一类新的广义凸函数,它既是不变B-凸函数,又是(p,r)-不变凸函数的推广形式.首先,利用B-(p,r)-不变凸函数讨论了目标函数和约束函数均可微的多目标分式规划问题(FP),得到了目标函数和约束函数在B-(p,r)-不变凸函数限制下可行解为有效解的一个最优性充分条件;其次,利用B-(p,r)-不变凸函数建立了多目标分式规划问题(FP)的Wolfe型对偶,证明了目标函数和约束函数在B-(p,r)-不变凸函数限制下的弱对偶,强对偶和严格逆对偶定理.其结论具有一般性,推广了许多涉及不变凸,不变B-凸,(p,r)-不变凸和B-(p,r)-不变凸函数的文献的结论.     

广义Ⅰ型一致不变凸条件下的极大极小分式规划的二阶对偶

给出一类新的二阶广义(F,α,ρ,θ)-d-Ⅴ-Ⅰ型一致不变凸的概念, 讨论了极大极小分式规划问题（P）, 建立了规划（P）的一个二阶对偶模型, 并利用此二阶广义Ⅰ型一致不变凸性, 得到了弱对偶、 强对偶和严格逆对偶定理.     

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     

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