(2+1)维随机KdV的精确解

利用埃尔米特变换求出(2+1)维Wick型随机KdV的精确解.通过埃尔米特变换把随机(2+1)维Wick型的随机KdV方程变成(2+1)维变系数KdV方程, 利用齐次平衡法求出方程的精确解, 并通过埃尔米特的逆变换求出方程的随机解.     

广义随机KdV和mKdV方程的随机类孤子解

通过Hermite变换把Wick-类型的广义随机KdV方程和广义随机mKdV方程变成普通的KdV方程,利用截断展开法和延拓齐次平衡法求出方程的解,然后通过Hermite的逆变换求出相应方程的随机钟状类孤子解.     

一类Wick型随机KdV方程的白色噪声泛函解

本文研究了一类随机偏微分方程-Wick类型KdV方程,并在Kondratiev分布空间(S)-1中利用Hermite变换给出了把Wick-类型的随机广义KdV方程的白色噪声泛函解.     

一类Wick型随机混合KdV方程的精确解

首先运用Hermite变换将Wick型随机KdV方程转换为确定性KdV方程,然后利用截断展开法得到方程的白噪声泛函解.     

用叠加法求Burgers-KdV方程的精确解析解

基于对Burgers方程、KdV方程和Burgers KdV方程特点的分析,提出了一种由Burgers方程的解和KdV方程的解构造Burgers KdV方程的解的叠加法,并用该法求得了Burgers KdV方程的解,所得结果与已有结果完全吻合.     

一些双线性型方程的 Bcklund变换及其相关问题

本文中我们考虑了五阶KdV方程,变形KdV方程和Ito方程以及相关的一些问题。我们给出了五阶KdV方程和二次变形的五阶KdV方程的Backlund变换(简称BT)及非线性叠加公式。利用Hirota的直接方法,我们求得了变形的五阶KdV方程的N-孤立子解。对于Ito方程,我们给出了其多参数的BT并导出了该方程的无穷多个守恒律。我们还考虑了五阶KdV方程及变形方程和Ito方程的BT与Scale变换之间的关系。此外,我们得到了五阶KdV方程的一个周期波解。     

随机广义KdV方程组的精确解

利用埃尔米特变换求出了Wick-类型的随机广义KdV方程组的精确解,这种方法的基本思想是通过埃尔米特变换把Wick-类型的随机广义KdV方程组变成广义系数KdV方程组,利用Jacobi椭圆余弦展开方法求出方程组的精确解,然后通过埃尔米特的逆变换求出方程的精确解.     

一些双线性型方程的Baecklund变换及其相关问题

本文中我们考虑了五阶KdV方程．变形KdV方程和Ito方程以及相关的一些问题。我们给出了五阶KdV方程和二次变形的五阶KdV方程的Baecklund变换(简称BT)及非线性叠加公式。利用Hirota的直接方法，我们求得了变形的五阶KdV方程的N-孤立子解。对于Ito方程，我们给出了其多参数的BT并导出了该方程的无穷多个守恒律。我们还考虑了五阶KdV方程及变形方程和Ito方程的BT与Scale变换之间的关系。此外，我们得到了五阶KdV方程的一个周期波解。     

一类广义KdV方程的行波解

研究一类广义KdV方程,包含了经典的KdV方程、mKdV方程和Camassa-Holm方程,并利用tanh函数方法,得到了此类广义KdV方程的新行波解.     

变系数KdV方程的精确解

讨论了物理背景很强的KdV方程的精确解问题,并利用齐次平衡法的改进,把过去的常系数KdV方程的精确解推广,得到了变系数KdV方程的精确解.     

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