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.     

Hardy空间Hp(BN)上的加权复合算子

设φ:BN→BN为全纯映射,ψ∈H(BN), 其中H(BN)表示BN上全纯函数集合.定义加权复合算子Wφ,ψf=ψ(fφ),f∈H(BN).作者研究了Hardy空间Hp(BN)上的加权复合算子的有界性、紧性、弱紧性.     

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.     

Cn中单位球上加权Bloch空间上的复合算子

对于单复变情形, Bloch空间、小Bloch空间上的复合算子以及加权复合算子的研究已有很多结果.对于Cn中的单位球Bn,通过定义其上的加权Bloch空间Blog={f∈H(Bn):supz∈Bn(1-|z|)ln 2/1-|z| f(z)|< ∞},其中H(Bn)为单位球上全纯函数的全体,f(z)=( f/ z1,…, f/ zn)为f的梯度函数,作者刻画了此空间上的复合算子的有界性和紧性,并得到了充要条件.     

BN上的加权Bergman空间到加权Bloch空间的Volterra复合算子

设BN是CN上的单位球,φ是BN上的全纯自映射,g,f∈H(BN).Volterra复合算子定义为Tg,φf(z)=f10f((4)(tz)) (A)g(tz)dt/t,z∈BN.利用符号函数φ和映射g的函数论性质,研究了在单位球上从加权Bergmar空间到加权Bloch空间的Volterra复合算子的有界性和紧性.     

Bloch型空间到Zygmund型空间的广义Cesciro算子和复合算子的积

ω和μ是[0,1）上的正规函数,g是单位球Bn上的全纯函数,φ是Bn上的全纯自映射,由g和φ诱导的算子TgCφ∶Bω（Bω,0）→Zμ（Zμ,0）定义为：TgCφf（z）=∫0 1 f（φ（tz））Rg（tz）dt/t,z∈Bn,f∈Bω（Bω,0）.给出了该算子从Bloch型空间到Zygmund型空间有界和紧的充要条件.     

单位球上Bloch型空间中复合算子的本性模估计

设Bn是n维复空间C^n中的单位球,φ=（φ1,…,φn）是Bn到自身的一个全纯映射,令P,q〉0,复合算子Cφ由（Cφf）（z）=f（φ（z））定义,通过找到一个性质很好的检验函数（见命题1）得到了单位球上p-Bloeh空间到q—Bloeh空间之间的有界复合算子Cφ的本性模的下界估计（具体结果见定理1）．     

加权BERGMAN空间上的加权复合算子

从加权复合算子Wφ,ψf和Carleson测度的定义出发,结合已有的结论,用Nevanlinna计数函数刻划出了加权复合算子Wφ,ψf在加权Bergman空间Apα上的有界性和紧性.     

小Bloch空间和Besov空间上的加权复合算子的超循环性

本文研究了小Bloch空间和Besov空间上的加权复合算子的超循环性,证明当解析自映射φ是自同构时加权复合算子λC_φ在小Bloch空间和Besov空间上都不是超循环的.此外,本文还研究了当解析自映射φ是非自同构、权λ∈C和u∈H(D)时加权复合算子在小Bloch空间和Besov空间上的超循环性.     

Bloch空间上的微分复合算子差分的有界性及紧性的新刻画（英文）

令D为一维复平面上的单位圆盘,φ和ψ是定义在D上的解析自映射.将解析函数f映射成f~((n))。φ的算子C_φD~n称为微分复合算子.本文研究了Bloch空间上的微分复合算子的差分C_φD~n-C_ψD~n,运用一种新的方式刻画了C_φD~n-C_ψD~n的有界性和紧性.此外,本文还给出了C_φD~n-C_ψD~n本性范数的一些估计.     

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.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

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.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

Jane Eyre——A Feminist In The 19th Century

In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.     

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-