(2+1)维变系数破裂孤子方程的无穷序列曲线孤子解及曲线孤子的相互作用

首先构造了(2+1)维变系数破裂孤子方程的无穷序列精确解.通过对精确解的分析,获得了以变速传播的任意形状的曲线光滑孤子、曲线紧孤子和曲线尖峰孤子.其次构造了(2+1)维变系数破裂孤子方程的双曲线孤子解.分析曲线孤子之间的相互作用并总结出了曲线孤子相互作用的主要特性.     

两类(2+1)-维孤子方程的显式解

应用双线性方法,在(1+1)-维方程的帮助下,研究和讨论两类(2+1)-维孤子方程的显式解,给出了方程的单孤子解,双孤子解和N-孤子解,提供了求(2+1)-维孤子方程显式解的可行途径.     

广义耦合非线性薛定谔方程中的达布变换和多孤子解

给出了广义耦合非线性薛定谔方程(GCNLS)的2种达布变换和多孤子解.对于自聚焦型GCNLS,给出了N个亮-亮孤子解,对于散焦型的GCNLS,由第2种达布变换给出了N-暗-暗孤子解.作为例子,文中给出了二孤子相互作用.     

两个变系数(2+1)-维孤子方程的显式解

应用双线性方法,结合一定的技巧,研究和讨论了两个变系数(2+1)-维孤子方程的显式解,给出了方程的单孤子解,双孤子解和N-孤子解,得到了(2+1)-维孤子方程不同于以往文献形式的新的显式解.     

耦合Burgers系统和Burgers方程的多孤子解(英文)

达布阵是构造非线性演化方程精确解的有效方法,本文应用该方法构造了一个耦合Burgers系统的达布变换和多孤子解,并利用约化技巧得到了Burgers方程的达布变换和多孤子解.通过画图给出这些多孤子解的图形.     

一类离散可积系统的孤子解

利用Darboux变换方法讨论一类离散可积系统. 先从新的初始解出发, 利用Darboux变换给出方程的精确解, 然后选择适当的参数, 给出方程的1-钟型孤子解、 1-扭结型孤子解、2-反钟型孤子解和周期解, 并给出其图像, 通过这些图像分析这些解的结构、弹性与非弹性碰撞.     

mKdV和mBBM方程的新型孤子解

尖峰孤子解和紧孤子解是非线性方程的新型孤子解.利用相关文献提出的方法分别研究修正的KdV方程(mKdV)和修正的BBM方程(mBBM),得到3种形式的孤子解:尖峰孤子解、双峰孤子解和尖峰紧孤子解.通过数值模拟得到解的图像,其中之一为双峰形的孤立波.这些结果进一步丰富了这2个非线性波方程的精确解的形式和内容.该文提出的3个拟解之一还可以用于其他多个非线性波方程,如:Klein-Gordon方程、Ф4方程、Sine-Gordon方程和Landau-Ginzburg-Higgs方程.     

一类微分-差分方程的孤子解

先根据一类微分 差分方程的Lax对, 构建该方程的N-fold Darboux变换, 然后应用Darboux变换, 得到该方程的精确解, 通过软件画图给出该方程的1-孤子解、 2-孤子解、 3-孤子解和4-孤子解, 并讨论3-孤子解和4-孤子解的弹性作用: 相互作用后, 孤子形状和振幅不发生变化.     

完全各向同性Landau-Lifschitz方程二孤子解的计算

引入规范矩阵将Landau-Lifschitz方程和Nonlinear Schrodinger(NLS)方程等价起来,利用求解NLS方程的方法建立相应的反散射变换方法求解Landau-Lifschitz方程,并给出了Landau-Lifschitz方程孤子解的确切表达式及二孤子解具体形式.     

一类微分-差分方程的孤子解

先根据一类微分 差分方程的Lax对, 构建该方程的N-fold Darboux变换, 然后应用Darboux变换, 得到该方程的精确解, 通过软件画图给出该方程的1-孤子解、 2-孤子解、 3-孤子解和4-孤子解, 并讨论3-孤子解和4-孤子解的弹性作用: 相互作用后, 孤子形状和振幅不发生变化.     

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.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

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-