广义Morrey空间中几类多变量算子及其交换子的有界性

设ωi（x,r）（i=1,2）是R^n×R^＋上的可测正函数,定义双（次）线性算子M2和T,证明了当（ω1,ω2）∈S0,n时,算子M2与T以及它们与BMO函数所生成的交换子在广义Morrey空间L^p1,ω1（R^n）×L^p2,ω2（R^n）到L^p,ω（R^n）上都是有界的．对于双线性算子T与Lipschitz函数组成的交换子,也得到了类似的有界性结论．这些结论推广了叶晓峰在广义Morrey空间上对几类交换子的估计．     

极大多线性奇异积分算子的一个加权估计

考虑极大多线性奇异积分算子TA^＊f（x）=ε〉0sup｜∫｜x-y｜〉ε ｜x-y｜^n＋1/Ω（x-y）（A（x）-A（y）-△↓A（y）（x-y））f（y）dy｜的加权L^p估计,其中Ω是零次齐次函数,在单位球面S^n-1上可积且满足一阶消失矩条件,函数A的所有一阶偏微商属于空间BMO（R^n）．证明了当Ω∈Lipα（S^n-1）（0〈α≤1）时,对于任意的p∈（1,∞）,δ〉0和权函数ω,TA^＊是L^p（R^n,ML（logL）^p＋δω）到L^p（R^n,ω）的有界算子,改进了此前的有关结论．     

Littlewood—Paley算子交换子的有界性

利用Hardy-Lorentz空间的原子分解,借助于L^q有界性的结论,使用不等式估计,证明了Littlewood—Paley算子交换子从Hardy—Lorentz空间到弱空间L^p,∞（R^n）的有界性。此结果补充了Littlewood—Paley算子交换子有界性理论。     

一类粗糙奇异积分算子交换子的有界性

证明了当b∈PBMO时,一类具粗糙核的奇异积分算子T的交换子[b,T]是从H^1(R^n)到弱L^1(R^n)以及从Hb^1(R^n)到L^1(R^n)上的有界算子．     

极大多线性Bochner-Riesz算子在一类Hardy-Block空间的加权有界性

利用空间的原子分解理论,证明了极大多线性Bochner-Riesz算子在一类Hardy-Block空间的加权连续性．关键词：Bochner-Riesz算子;多线性算子;BMO(R^n);A1-权;Hardy空间;Hardy-Block空间。     

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.     

多线性奇异积分算子的加权模不等式

建立了多线性Calderon—Zygmund奇异积分算子及其相关极大算子的交换子的一些加权L^p估计．     

半线性奇异双曲方程组哥西问题的整体解

文章在空间L^2(R^n)中考虑半线性奇异双曲方程组的哥西问题（S）｛t^бdu\dt Au-t^ρBu=f(t,u)0≤t≤T lim u（t)t→0^ =在算子A、B及函f(t,λ）的某此假设下,证明了问题（S）在函数C^0([0,T],L^2(R^n))∩C^1((0,T),L^2(R^n)中整体解存在。     

向量值Littlewood-Paley算子的多线性交换子的Sharp函数估计

证明了向量值Littlewood-Paley算子的多线性交换子的Sharp函数估计,利用该估计,得到了该向量值多线性交换子的加权L^p不等式．     

向量值Littlewood-Paley算子的多线性交换子的端点估计

证明向量值Littlewood-Paley算子的多线性交换子|gb→ψ|r的端点有界性,即|gb→ψ|r是从L∞(w)到BMO(w)有界的,|gb→ψ|r是从Bp(w)到CMO(w)有界的.     

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.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

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