正烷基环己烷结构与熔点关系的拓扑化学研究

用分子拓扑学方法探讨了正烷基环己烷的熔点与分子结构的关系；提出一个结构基础明确的定量关系，对甲基环己烷到正三十六烷基环己烷的计算结果表明，熔点计算值都很接近实验值，平均误差仅０．０９１％，应用这一定量关系，不仅能够合理表征正烷基环己烷的结构性能关系，而且有助于揭示和物质结构与性能关系之间的奥秘。     

支链烷烃表面张力的结构信息法研究

本文根据分子结构的特点,应用二级结构信息法从分子间相互作用力的角度系统研究探讨了支链烷烃表面张力与其分子结构之间的关系,得到一个具有明确结构基础的定量关系。对大量支链烷烃表面张力的计算结果表明,本文定量关系计算值十分接近实验值,计算结果的平均绝对误差为0.00032(N/m)、标准偏差(S)为0.00038(N/m)、平均相对误差为1.54％,计算精度显著优于文献方法。     

正烷基环戊烷结构与熔点关系的拓扑化学研究

借助于分子拓扑学探讨了正烷基环戊烷的熔点与分子结构的关系，提出了一个结构基础明确的定量关系，对甲基环戊烷到正三十六烷基环戊烷的计算结果表明，熔点计算值都很拉近实验值，平均误差仅０．１１１％?应用这一定量关系，兴驻能够合理表征正烷基环戊烷结构与烷点的关系，而且有助于提示物质结构与性能关系之间的奥秘。     

根据分子结构信息计算不同温度下烷烃密度

根据分子结构的特点，提出了一种结构信息计算不同温度下烷烃密度的方法。对45种烷烃629个数据点的计算结果表明，密度预测值与实验值的一致性令人满意，平均0．514％。本文方法的提出，不仅揭示了烷烃的密度与分子结构之间的定量关系，而且提供了一种根据分子结构预测不同温度下烷烃密度的有效方法。     

碳氢化合物性质的计算V、烷烃的摩尔磁化率

本文用图论方法探讨了烷烃的摩外汇券产化率与其分子结构之间的关系。提出了一个具有一定结构基础的定量关系式，据此可计算烷烃的摩尔磁化率，对烷烃的计算结果表明，计算值与实验值的一致性令人满意，平均绝对误差0．662（pm^3.mol^-1)。     

烷烃分配系数与其分子结构间定量关系的探讨

本文用图论方法探讨了烷烃的分配系数与其分子结构之间的关系，提出了一个具有一定结构基础的定量关系式，据此可计算烷烃的分配系数。本文定量关系的提出，不仅能够合理表征烷烃分配系数与分子结构的关系，而且为工程上提供了一种预测烷烃分配系数的有放方法。     

烷烃摩尔体积与分子结构之间定量关系的探讨

根据分子结构的特点，用拓扑方法探讨烷烃摩尔体积与分子结构间的定量关系，通过用距离矩阵和染色矩阵表征分子中基团的特性和连接性，发展一种直接根据分子结构计算烷烃摩尔体积的方法。对725种烷烃（C1到C40）的计算结果表明，计算值十分接近实验值，平均误差0．25％。     

烷烃总化学位移与分子结构之间定量关系的研究

根据分子结构的特点,探讨了烷烃13C总化学位移(Chemical Shift Sum,CSS)与其分子结构之间的关系.通过用距离矩阵表征分子结构的特性,提出了一种直接根据分子结构信息计算烷烃CSS的方法.对72种烷烃的计算结果表明,计算值与实验值之间的一致性令人满意,平均误差为1.78%,计算精度优于文献方法.该方法的提出,不仅在一定程度上揭示了烷烃CSS的变化规律,而且提供了一种计算烷烃CSS的有效方法.     

烷烃总化学位移与分子结构之问定量关系的研究

根据分子结构的特点，探讨了烷烃^13c总化学位移(Chemical Shift Sum，CSS)与其分子结构之间的关系．通过用距离矩阵表征分子结构的特性，提出了一种直接根据分子结构信息计算烷烃CSS的方法．对72种烷烃的计算结果表明，计算值与实验值之间的一致性令人满意，平均误差为1．78％，计算精度优于文献方法．该方法的提出，不仅在一定程度上揭示了烷烃CSS的变化规律，而且提供了一种计算烷烃CSS的有效方法．     

饱和烷烃第二维里系数与分子的拓扑结构的关系

本文采用图论方法对饱和烷烃第二维里系数B与分子结构的关系进行了探讨，结果发现烷烃第二维里系数与Wiener指数具有较好的相关性，并建立了它们之间的一个定量关系。对C2～C8共39个饱和烷烃B的计算表明，计算值与文献值的一致性是令人满意的。拓展了Wiener指数的应用领域，有助于深入理解第二维里系数的物理意义。     

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