型B半群上的同余

主要研究了型B半群上的容许同余,给出了型B半群上的容许同余核的一些性质,并得到了型B半群上最小容许同余的刻画。特别地,给出了型B半群上具有E性质的容许同余的刻画,得到了一些结果。     

Hilbert空间中观测算子的容许性

引入无界观测算子无限时p容许性,给出了无限时p容许性的基本性质,并对具体例子讨论了观测算子的无限时p容许性.     

二次损失下增长曲线模型回归系数非齐次线性估计的可容许性特征

讨论了增长曲线模型回归系数非齐次线性估计在六种不同形式容许性定义下的可容许性，得到了在估计类中KBL的非齐次线性估计在这六种容许定义下可容许的充要条件。     

熵损失函数下一类广义分布族参数估计的容许性

在熵损失函数下,研究了一类分布族参数的Bayes估计和可容许估计,并讨论了一类(cT+d)-1形式估计的可容许性和不可容许性.     

一类数字半群容许的型

本文探究一类特殊的数字半群所容许的齐次线性型,证明这一类数字半群容许任意的强容许型、减法度大于等于2的减法型以及可容许度大于等于2的布尔型。同时还探究了被这一类数字半群及其极大理想所容许的非齐次线性型,即这一类数字半群的极大理想容许长度为n,常数项为PFn(S,M(S))的型。     

约束条件下误差协方差阵的二次型估计的可容许性

估计的可容许性一直是模型估计理论的重要部分,其主要包括系数估计的可容许性与误差估计的可容许性。随着统计模型的不断扩展与完善,各种有关的容许性理论也在不断的更新和完善之中。作为椭圆约束下一元模型中误差估计的可容许性向高维的一种推广,本文主要讨论在不等式约束条件下多元线性模型中误差协方差阵V的二次型估计的可容许性,得到了在二次型估计可容许的必要条件以及rk（x）=1与x=（1,1,…,1）T情形下可容许估计的充要条件等结果。     

基于熵损失函数和定数截尾情形下一类分布族参数的估计

基于定数截尾和熵损失函数,得到了一类分布族参数的Bayes估计和可容许估计,并讨论了一类(cT+d)-1形式估计的可容许性和不可容许性.     

线性系统的容许观测性

给出观测算子的一种弱有限时、弱无限时容许性定义,讨论了在G0-半群满射条件下此类容许性与通常的容许性等价．     

对称熵损失函数下两参数广义指数分布形状参数的Bayes估计

在对称熵损失函数下,讨论了两参数广义指数分布形状参数的Bayes估计和可容许估计,并给出了一类逆线性形式(cT+d)-1估计的可容许性和不可容许性的条件.     

多元线性模型回归系数的所有可容许线性估计

讨论了多元线性模型中 ,线性估计 AY a在一切估计类中是线性可估函数 SB的 A-可容许性估计、E-可容许性估计及 G-可容许性估计的主要条件 .     

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.     

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。     

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.     

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     

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