梁弯曲问题的样条小波边界元法

采用四阶（三次）样条小波尺度函数,构造了函数的B样条小波插值格式,并将其应用于梁的弯曲问题边界元法．算例的计算结果与精确解完全一致．文中给出的样条小波插值函数,可应用于其他有限元法、边界元法的的计算．     

一般二维场域中的B样条有限元法

通过矩形域上的B样条插值函数逼近定义于该域内任意子域上的待求函数,并用广义变分原理处理第一类边界条件,本文建立了适合于一般二维区域的B样条有限元法。实例计算表明了该方法的优点和实用价值。     

电磁场计算中的样条边界元法

提出了用于电磁场计算的样条边界元法。文中基于B样条函数插值,推导了二维静态场中样条边界元法的计算公式,有效地处理了边界角点和奇异积分问题。最后,将该方法用于计算两个实例。     

边界元数值计算中样条插值函数特征分析

样条函数替代边界元数值计算中常用的分段多项式插值作函数逼近，其优点是：一方面，在给定区间上用三次样条逼近任意有二阶连续导数的函数，均方差最小；另一方面，三次样条的阶次较低，结点值的误差不会因插值计算而扩散很远，插值计算的稳定性好。分析了样条插值函数特征，并给出了具体求解格式。数值计算中引入样条函数，使最终系数矩阵变成带宽很窄的条带阵，与分段多项式插值相比，大大提高计算精度和解题效率，为解决边界元数值计算中遇到的困难奠定了基础。     

岩体力学边界元数值计算中插值函数的改进

在样条函数替代边界元数值计算中，常用分段多项式插值作函数逼近，其优点非常突出：一方面，在给定区间上用三次样条逼近任意有二阶连续导数的函数，均方差最小；另一方面，三次样条的阶次较低，结点值的误差不会因插值计算而扩散很远，插值计算的稳定性好。文中分析样条插值函数特征，给出了具体求解格式。数值计算中引入样条函数，使最终系数矩阵变成带宽很窄的条带阵，为解决边界元数值计算中遇到的困难奠定了基础。     

三次样条插值曲线弧长算法与工程实现

讨论了三次样条插值曲线的弧长算法，并将其应用于工程实际，解决了水电站尾水管钢筋长度计算问题。     

R-B方程样条有限元法

作者对R-B方程提出了基于三次样条插值的有限元法,给出了具体的计算格式,证明了该离散格式解的存在唯一性和稳定性,并给出了收敛性分析.     

基于有限样条法的圆锥壳自由振动特性分析

该文以圆锥壳为研究对象,采用有限样条法求解圆锥壳的振动特性。通过3次B样条插值,将圆锥壳的节元半径表示为与位移有关的变量,在此基础上推导了锥壳结构振动的运动方程,并采用matlab软件编写了相关程序,分析了边界条件对圆锥壳的振动特性的影响。计算结果表明采用样条有限元法求解壳体的振动特性具有精度高、求解快、计算量小等优点。     

三次样条插值曲线弧长算法与工程实现

讨论了三次样条插值曲线的弧长算法，并将其应用于工程实际，解决了水电站尾水管钢筋长度计算问题。     

样条积分方程法求解非线性磁场问题

在积分方程法的基础上，引入样条插值技术，提出了一种新的求解三维非线性磁场问题的数值方法——样条积分方程法．应用该方法采用国际ＴＥＡＭＷｏｒｋｓｈｏｐ第２１基准问题进行核算并对铝电解槽模型内的磁场分布进行了计算分析．结果表明：样条积分方程法在减少计算资源，提高计算精度等方面具有明显优势     

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