线性互补问题解存在的条件

线性互补问题是一类重要的优化问题.本文研究了线性互补问题解的存在性,证明了其解的存在唯一性定理,给出了线性互补问题解存在的充分条件和充分必要条件,并指出了这些条件之间的内在关系.     

关于扩展的垂直线性互补问题的V-P性质

进一步研究扩展的垂直线性互补问题,即将线性互补问题中的P性质在扩展的垂直线性互补问题中推广为V P性质.正如P性质是线性互补问题有唯一解的充要条件,V P性质是扩展的垂直线性互补问题有唯一解的充要条件.通过引入行表示和行重排的思想,给出了扩展的垂直线性互补问题的V P性质的3个新的等价特征结果.     

线性互补问题解的存在性

利用同伦方法对线性互补问题LCP(M,q)进行求解, 给出了半单调线性非齐次互补问题有解及其所对应的齐次互补问题LCP(M,0)只有零解的关系, 并给出了具有严格可行性时互补问题有解的一个条件.     

正弦余弦算法求解线性互补问题的最小范数解

针对存在多个解的线性互补问题,找出尽可能多的解,进而在众多解中寻找最小范数解,成为当前的一个研究热点.论文通过把线性互补问题转化为绝对值方程,定义了智能算法的适应值函数,采用正弦余弦算法求解线性互补问题,在其中选取范数最小的解.数值结果表明该方法能够找到原问题尽可能多的最小范数解,可为研究其稀疏解提供一些近似结果.     

线性互补问题解存在的一个正则性条件

用同伦方法讨论线性互补问题解存在的条件. 首先, 给出与线性互补问题等价的绝对值方程, 然后对绝对值方程构造同伦方程, 并借助于该同伦方程给出绝对值方程解存在的一个正则性条件, 该正则性条件可转化为线性互补问题解存在的条件.     

求解随机二阶锥线性互补问题的期望残差最小化方法

引入期望残差最小化(ERM)方法来求解随机二阶锥线性互补问题.在非负象限内,利用ERM方法求解随机线性互补问题是可行的,为此将非负象限内的随机线性互补问题延伸到二阶锥内.首先,介绍了二阶锥矢量相关的若尔当积及谱分解等预备知识.然后,通过二阶锥互补函数FB函数将随机二阶锥线性互补问题转化为极小化问题.以预备知识为基础证明了若尔当积下的x2与x 2的关系,并进一步证明了离散型目标函数解的存在性与收敛性.最后,证明利用ERM方法解随机二阶锥互补问题是可行的.     

线性互补问题的数值分析

综述了线性互补问题理论的最新发展和已有成果,包括线性互补问题的数值解法,特别是模基矩阵分析算法、误差分析以及扰动分析.给出了线性互补问题的数学问题形式、数学模型以及相关概念;介绍了求解线性互补问题的各种数值解法,其中重点关注迭代法特别是近年来比较热门的模基矩阵分裂迭代法,基于模方程通过运用非光滑Newton法的思想,给出了模基非光滑Newton法,新算法比已有的模基矩阵分裂迭代法收敛更快;给出了线性互补问题解的误差分析,介绍了已有的几个误差界结果,包括运用预处理技术得到的更好的新误差界.同时介绍了线性互补问题解扰动分析的结果及目前最新的扰动界.     

一个求解绝对值线性互补问题的罚函数方法

通过构造罚方程的思想提出一个求解绝对值线性互补问题的罚函数方法,证明了当惩罚因子趋于正无穷时,所提出了罚函数方法的解收敛于绝对值线性互补问题的解,并且收敛速率是指数次.     

P0水平线性互补问题解的存在性

利用互补问题的等价条件对P₀水平线性互补问题构造例外族, 获得了水平线性互补问题有解的一个择一性定理, 并用该择一性定理给出了P₀水平互补问题在Mx+Ny=0, x≥0, y≥0, x^Ty=0只有零解的条件下是可解的.     

线性互补问题解存在的一个条件

利用同伦方法求解线性互补问题,通过对R0矩阵对应的线性互补问题构造新同伦方程,给出同伦路径存在的一个新条件,并在该条件下证明同伦路径的有界性和收敛性,得到了线性互补问题解存在的一个条件.     

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     

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<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