单位球上的可逆加权复合算子

将一个全纯函数f 映射成ψ*f。φ的算子Cψ,φ,我们称它为加权复合算子,其中φ是一个全纯映射,ψ是一个全纯函数.n维复空间的单位球上的Hardy-Hilbert 空间H2（Bn)以及加权Bergman空间A2α(Bn)上的加权复合算子的可逆的充分必要条件为ψ以及1/ψ均本性有界且φ为球全纯自同构.此外,还计算φ是椭圆自同构且不动点导数特征值为有理变换情况下加权复合算子的谱.     

有离散群作用的C*-对应的交叉乘积

假设(X,A,φ)是一个有离散群G作用的C*-对应,并且满足条件φ是单的,K(X)(∪)φ(A),证明了对于其自然诱导的C*-对应(X(×)G,A(×)G,ψ),(O)X(×)G≌(O)X(×)G

Abstract：

Let(X,A,φ)be a C*-correspondence with a compatible action by a discrete amenable group G,where φ is injective with K(X)(∪)φ(A).It's shown that for the natural C*-correspondence(X(×)G,A(×)G,ψ),one has(O)X(×)G≌(O)X(×)G.     

Q_K(p,q)空间到Bloch型空间上的Stevi?-Sharma算子

在文献[1]中,Sharma A K讨论了Bergman空间Bloch型空间六种算子M_ψC_φD、M_ψDC_φ、C_φM_ψD、DM_ψC_φ、C_φDM_ψ、DC_φM_ψ.受此启发,本文研究Q_K(p,q)空间到Bloch型空间上的Stevi?-Sharma算子的有界性和紧性,并给出了当p≠q+2时Q_K(p,q)空间到Bloch型空间上的Stevi?-Sharma算子是有界算子或紧算子的充分必要条件.本文的结果推广了文献[2,3]中的部分结果.     

单位球上加权复合算子可逆的充要条件

设φ是一个全纯映射,ψ是一个全纯函数,将一个全纯函数f映射成ψ·f °φ的算子Cψ,φ称为加权复合算子.文中证明了n维复空间的单位球上的Hardy-Hilbert空间H~2(B_n)以及加权Bergman空间A2α(Bn)上的加权复合算子可逆的充分必要条件为ψ以及1/ψ均本性有界且φ为球全纯自同构.此外,φ是椭圆自同构且不动点导数特征值为有理旋转的加权复合算子的谱也在文章中给出.     

加权Bergman空间Aα2(Ω)上的加权复合算子

文章研究多复变Cn中有界对称区域Ω的加权Bergman空间Aα2(Ω)上的加权复合算子Cψ,ψ,得到了Cψ,ψ为有界算子、紧算子的充要条件.     

对数Bergman 型空间到Bloch空间上的Stevic-Sharma 算子

设D是复平面中的开单位圆盘,φ是D到自身的解析映射,H(D)是D上的解析函数空间.为了统一研究复合算子、乘积算子和微分算子三者的乘积,Stevic和Sharma引进了如下的Stevic-Sharma算子:T_(φ1,φ2),_φf(z)=ψ_1(z)f(φ(z))+ψ_2(z)f′(φ(zf∈H(D),其中ψ_1,ψ_2∈H(D).本文利用符号函数给出了对数Bergman型空间到Bloch空间上Stevic-Sharma算子的有界性、紧性刻画.     

多圆柱上从加权Bergman空间到Bloch型空间的加权复合算子

设Dn是Cn中的单位多圆柱,φ(z)=(φ1(z),φ2(z),…,φn(z))是Dn的一个全纯自映射,ψ(z)是Dn上的全纯函数.研究了单位多圆柱上从加权Bergman空间到Bloch型空间的加权复合算子ψCφ;通过φ和ψ的函数特征,分别给出了单位多圆柱上从加权Bergman空间到Bloch型空间的加权复合算子ψCφ的有界性和紧性的充分必要条件.     

Bergman空间上等距的复合算子乘积

考虑Bergman空间上的复合算子Cφ和Cψ,利用Bergman空间上等距的复合算子的性质,给出了算子乘积CφC*ψ和C*ψCφ成为Bergman空间上的等距算子、酉算子的充要条件,同时证明了CφC*ψ是等距的当且仅当它是酉算子,而且还等价于φ和ψ都是单位圆盘到单位圆盘的旋转映射.     

α-Bloch型空间上MФCφD算子的有界性及紧性

在文献[1]中,Kumari R和Sharma A讨论了α≥1,β〉0时函数空间Bα到Bβ上的线性算子CφD的有解性及紧性.在此基础上,本文讨论了α〉0,β〉0,函数空间Bα到Bβ上的加权复合微分前置算子MФCφD.并给出了使得MФCφD是有界算子或紧算子的充要条件,推广了Kumari R和Sharma A的结果,旨在更好地了解α-Bloch型函数空间的性质.     

加权Dirichlet型空间上的紧复合算子

利用复合算子有界及紧性的比较性结果证明,当1≤p＜2α≤2,或1≤p＜1+α且α＞1时,Cφ在Dpα上紧当且仅当φ在( D)上无角导数.     

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     

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