关于半环上矩阵的加权广义逆

引入半环上矩阵的加权广义逆的概念,探讨了半环上矩阵的加权广义逆与矩阵方程及矩阵的行(列)空间的关系.同时,得到了半环上矩阵的加权广义逆存在的几个等价刻划.     

关于半环上矩阵的广义逆

探讨了半环上矩阵的广义逆、{1,2}-逆与M-P逆.分别给出了半环上矩阵存在广义逆与{1,2}-逆的等价条件.同时证明若M-P逆存在,则它是唯一的.     

关于半环上矩阵的T-序与广义逆

引入半环上矩阵T-序的概念,探讨了半环上矩阵的T-序与广义逆的关系。同时得到了半环上矩阵T-序的性质。     

广义Fuzzy矩阵的广义逆

讨论了半环〈IL0.1,∨,∧〉与〈F(x),∪,∩〉上广义逆矩阵的计算问题,并给出了广义逆矩阵与解关系方程的关系     

半环上矩阵的广义逆

研究了加法幂等除半环上一类特殊的上三角矩阵的广义逆。利用数学归纳法,给出此类特殊的上三角矩阵的元素间的关系。在此基础上,证明了此类特殊的上三角矩阵类中每一个矩阵都是正则矩阵以及存在{2}-广义逆。     

保持两类特殊半环上矩阵{1}-逆的线性算子

目的研究了保持两类特殊半环上矩阵{1}-逆的可逆线性算子。方法采用线性扩张的方法。结果完全地刻画了保持可换无零因子反环和广义布尔代数上矩阵{1}-逆的可逆线性算子。结论所得结果对研究保持半环上矩阵{1}-逆的线性算子有重要作用。     

加权广义逆递归计算的一种统一方法

用一种统一的方法，简单地导出了矩阵不同类型加权广义逆的递归计算公式，包括加权MoorePenrose广义逆，M最小二乘广义逆和极小N范数广义逆等．     

Quantale矩阵的加权M-P广义逆的反序律

通过举例说明实数域上矩阵和Quantale上矩阵存在较大差异,进而给出Quantale矩阵加权M-P广义逆的定义,并得到Quantale矩阵加权M-P广义逆的反序律成立的充要条件。     

交换半环上矩阵的行列式秩

在交换半环上首先研究矩阵的行列式秩与正、负复合矩阵的一些性质和关系,然后给出行列式秩与广义逆矩阵的一些相关结论,最后分别讨论行列式秩为1的矩阵其g-逆、群逆、M-P逆存在的充分必要条件.     

Quantale矩阵的加权M-P广义逆

类比于态射或环上的对合运算,引入Quantale上的对合运算,从而给出Quantale上矩阵的加权M-P广义逆以及左(右)可消的定义,得到在此定义下Quantale上矩阵若存在加权M-P广义逆,则它是唯一的.在此基础上,用环论的方法,得到Quantale上矩阵存在加权M-P广义逆的一些等价刻画及显式表达式,得到的结论是新的,推广了该领域的最新结果.     

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