几类含奇线双曲型方程的Riemann函数

本文用Ｃｈａｕｎｎｙ方法寻找几类含奇线的双曲型方程的Ｒｉｅｍａｎｎ函数，获得几类明显的Ｒｉｅｍａｎｎ函数公式，这对于应用是非常方便的．     

多复变函数的Riemann边值问题的进一步讨论

多复变函数的Ｒｉｅｍａｎｎ边值问题的进一步讨论王莉萍（青岛海洋大学应用数学系，２６６００３，山东青岛）本文讨论了多圆柱区域上。元解析函数的Ｒｉｅｍａｎｎ边值问题在一定条件下的可解性，并给出了上述边值问题解的积分表达式．设ｃ（ｊ＝ｌ，…，ｎ）是Ｚ；平面...     

关于延拓算子的一个注记

研究Sobolev空间中零延拓与反射延拓的区别与联系,并探讨了广义导数与弱导数的关系,由此论证了乘积函数求弱导数与广义导数,从而严格修正了乘积函数求导表达式(η-u)′=η′-u+η-u′.     

多圆环柱域上解析函数的边值问题

讨论多圆环柱域上多个复变量的解析函数的Ｒｉｅｍａｎｎ－Ｈｉｌｂｅｒｔ边值问题。通过引入变态的边值问题和对解析函数的Ｄｉｒｉｃｈｌｅｔ边值问题的可解性的证明，给出了解析函数的Ｒｉｅｍａｎｎ－Ｈｉｌｂｅｒｔ边值问题可解的充要条件及解的积分表达式。     

一类正则型函数组Riemann边值逆问题

一类正则型函数组Ｒｉｅｍａｎｎ边值逆问题杨晓春（宁夏大学数学系，７５００２１，宁夏银川）本文讨论了一类特殊形式的正则型函数组Ｒｉｅｍａｎｎ边值问题的逆问题．利用函数组的Ｒｉｅｍａｎｎ边值问题的现有结论，给出了此问题的解法及封闭解．１问题的说明设Ｌ为复...     

一类开口弧段的Riemann边值问题的逆问题

一类开口弧段的Ｒｉｅｍａｎｎ边值问题的逆问题赵春（宁夏大学数学系，７５００２１，宁夏银川）文［２」讨论了一类常系数情形下的Ｒｉｅｍａｎｎ边值逆问题．本文Ｒｉｅｍａｎｎ逆边值问题由ｋ见可教授提出．我们利用解析函数边值问题经典理论，对此逆问题进行讨论．设...     

Riemann积分注记

用Ｒｉｅｍａｎｎ积分通常定义的等价定义,研究了Ｒｉｅｍａｎｎ积分的若干性质以及积分函数的性质。     

一个实函定理的初等证明及其应用

本文给出了一类Ｒｉｅｍａｎｎ积分等价定义的初等证明，作为应用，在通过对函数定义域进行可测子集分割而引入Ｌｅｂｅｓｇｕｅ可积的概念时，可直接从定义得出“Ｒｉｅｍａｎｎ可积一定Ｌｅｂｅｓｇｕｅ可积”这一著名结果，从而弥补了许多教科书按上述方法证明中所忽略的问题。在本文的证明中，我们引入了实值函数的一类新跳跃点概念。     

2n个未知函数的一阶椭圆组的Riemann—Hilbert问题

讨论了２ｎ个未知函数的一阶椭圆组的Ｒｉｅｍａｎｎ－Ｈｉｌｂｅｒｔ边值问题．提出２ｎ个未知函数的变态Ｒｉｅｍａｎｎ－Ｈｉｌｂｅｒｔ边值问题,建立了此边值问题解的积分表示式与先验估计,用Ｓｃｈａｕｄｅｒ不动点定理证明了此边值问题解的存在性,进而导出了满足某些条件下的２ｎ个未知函数的一阶椭圆组的Ｒｉｅｍａｎｎ－Ｈｉｌｂｅｒｔ边值问题的可解性定理．     

一类周期Riemann边值逆问题

一类周期Ｒｉｅｍａｎｎ边值逆问题李星（宁夏大学数学系，７５００２１，宁夏银川）解析函数边值逆问题在工程中具有广泛的应用，例如在接触力学，断裂力学及其关联的平面弹性等问题中均有应用’‘－‘．但其研究才刚刚起步．该文给出一类周期Ｒｉｅｍａｎｎ边值逆问题（...     

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