亚纯函数权分担集合的唯一性

利用权分担概念对亚纯函数具有两个分担集合唯一性问题进行研究,证明了存在一个具有5个元素的集合S和集合{0,1},使得对任何两个非常数亚纯函数f与g,只要f与g权分担S和CM分担集合{0,1},则f与g恒等.     

正规族与分担集合

主要证明了涉及分担集合的亚纯函数的正规定则。已有文献证明了在亚纯函数函数族中,若任意函数的零点为k+1重,且任意两个函数的k阶导数分担一个二值集合,则该函数族正规。利用Zalcman-Pang方法,证明了k=0的情况。设a,b,c为3个互不相同的有限复数,S={a,b},h为有穷正数,F是区域D内的一族亚纯函数,若满足:1)对于F中任意的两个函数f,g,f,g在D内分担集合{a,b};2)对于F中任意的函数f,f=c→f′≤h,则F在D内正规。     

分担两个公共值集的亚纯函数的惟一性问题

在Nevannlinna值分布理论和现代许多学者在亚纯函数惟一性方面所获得的结果的基础上,考虑在涉及权分担的情况下进一步讨论了两个集合的亚纯函数的惟一性问题.证明了:对于任意两个非常数的亚纯函数f和g,只要按权k分担集合S和IM分担{∞},就必有f≡g.此结果推广了仪洪勋教授一个结果.     

权分担三个集合的亚纯函数的唯一性

利用权分担集合的思想讨论了关于分担三个集合的亚纯函数的唯一性问题．证明了：设f与g是开平面上两个非常数亚纯函数,k：（i=1,2,3）为非负整数,n为不小于2的整数．若Ek1（{1,ω,ω^2,…,ω^n},f）=Ek1（{1,ω,ω^2,…,ω^n}g）Ek2（{0},f）=Ek2（{0},g）Ek3（{∞},f）=Ek3（{∞}g）且a,b,c,n满足（an-a-2）（bcn-b-f）〉2bcn,其中k1＋1=a,k2＋1=b,k3＋1=c,则f=tg（t^n=1）;或fg=s（s^n=1）,且0和∞为f与g的缺省值．     

关于分担集合的亚纯函数的正规定则

从分担值集的角度出发,研究了亚纯函数的正规性,推广了前人的结果,得到了关于分担集合的亚纯函数正规性的一个结果。即：设n,6为两个判别的有穷复数,s={a,b},如果{f（κ）}中所有函数,f（κ）在D内以S为IM分担值集。则{f（κ）}在D内正规。     

微分多项式分担集合的亚纯函数正规定则

 研究涉及微分多项式分担集合的亚纯函数的正规性问题。设k≥2是正整数,F为区域D的一族亚纯函数, 其所有零点重级至少为k;a,b和c是复数,且a≠b,c≠0。如果对于F中的任意一对函数f(z)和g(z),有f与g分担c, 且L(f)与L(g)分担集合S={a,b}, 则F在D内正规。     

具有两个分担值集的亚纯函数

研究了亚纯函数的惟一性问题,在将分担值集的有关条件减为较弱的情况下,证明了下述结论:如果存在一个具有12个元素的复数集合S,使得对任意两个非常数的亚纯函数f和g,只要满足E—({∞},f)=E—({∞},g)和E—k)(S,f)=E—k)(S,g),其中k≥3,则必有f≡g.这一结论改进了仪洪勋和吕巍然的结论.假设S是一个具有13个元素的集合,若对任意的两个非常数亚纯函数f和g,只要满足E—({∞},f)=E—({∞},g)和E—(S,f)=E—(S,g),则必有f≡g.     

以权1分担两个公共值集的亚纯函数

研究了亚纯函数以权1分担两个公共值集的唯一性问题,设S={ω∈C;aωn-n(n-1)ω2+2n(n-2)bω-(n-1)(n-2)b2=0},其中a,b为两个非零复数,且满足abn-2≠2,如果n≥11,f和g以权1分担S,E—(∞,f)=E—(∞,g),则f≡g.     

分担集合的亚纯函数正规族

把亚纯函数正规族与分担值或分担集合结合起来考虑是亚纯函数正规族理论研究的重要课题。利用Nevanlinna理论研究一类涉及分担集合的亚纯函数族的正规性,主要证明了如下的结论:设F={f(z)}是区域D内的一亚纯函数族,a,b,c是三个相互判别的有穷复数,S={a,b},A为有穷正数,如果对于任意的f(z)∈F,有f(z)-c的零点重级至少为1,且满足两个条件:(ⅰ)E_f'(S)?E_f(S),(ⅱ)当f(z)=c时,有|f'(z)|≤A且0 |f″(z)|≤A,则F在区域D内正规。     

分担集合的亚纯函数正规族

把亚纯函数正规族与分担值或分担集合结合起来考虑是亚纯函数正规族理论研究的一个重要课题.目前正规族的相关理论在复动力系统、复微分方程和整函数唯一性等方面都有着重要的应用.利用Nevanlinna理论研究一类涉及分担集合的亚纯函数族的正规性.主要证明了如下的结论:设F={f(z)}是区域D内的一族亚纯函数,S_1={a_1,a_2,a_3}和S_2={b_1,b_2,b_3}均为由3个互异的有限复数所构成的集合,如果对于任意的f(z)∈F,有{z∈D:f(z)∈S_1}={z∈D:f′(z)∈S_2},那么F={f(z)}在D内正规.     

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