Redlich-Kwong实际气体转换温度的研究

通过计算和分析得到了Redlich-Kwong（R-K）实际气体转换温度与压强的函数关系，并且应用Matlab仿真技术绘制出RK气体反转曲线，将其与vdW、Dieterici以及实验测定的气体反转曲线进行对比分析发现，曲线非常逼近实验测定的气体反转曲线，从而说明了由R-K物态方程导出的气体转换温度与实际气体转换温度吻合得比较好．     

气体沿任意过程的热力学性质

 导出气体沿任意过程的热容、膨胀系数、压强系数和压缩系数等重要热力学参量的普遍表达式,并以范德瓦尔斯方程和一个推广的RK方程为例,讨论实际气体沿一些具体过程的热力学性质.所得的结果不仅可推出文献中已有的一些重要内容,而且还可导出一些有意义的新结论.     

vdW气体比热容比与音速关系的理论研究

通过热力学关系分析和导出vdW气体的比热容比与音速的关系式，将它与实验测定的数值以及理想气体比热容比进行对比分析，并运用Matlab仿真技术绘制出比热容比与温度的关系曲线，进而说明vdW气体比热容比与实际气体比热容比吻合的程度好于理想气体的比热容比．     

转换温度中Berthelot物态方程内压强项温度指数的修正

设定Berthelot实际气体物态方程内压强项中待定的温度指数参数为α,根据热力学理论推导出具有温度指数参数的Berthelot实际气体转换温度与压强的函数关系式,应用计算机MATLAB模拟仿真技术绘制反转曲线,将其与气体实验反转曲线进行对比,确定两者拟合情况较好时的指数修正参数,得到修正后的Berthelot实际气体物态方程。修正后的Berthelot实际气体物态方程在描述气体通过节流手段获得低温时更贴近气体的实验行为,在节流制冷工艺流程中具有更强的使用价值和理论指导意义。     

转换温度中Berthelot物态方程内压强项温度指数的修正

设定Berthelot实际气体物态方程内压强项中待定的温度指数参数为α,根据热力学理论推导出具有温度指数参数的Berthelot实际气体转换温度与压强的函数关系式,应用计算机MATLAB模拟仿真技术绘制反转曲线,将其与气体实验反转曲线进行对比,确定两者拟合情况较好时的指数修正参数,得到修正后的Berthelot实际气体物态方程.修正后的Berthelot实际气体物态方程在描述气体通过节流手段获得低温时更贴近气体的实验行为,在节流制冷工艺流程中具有更强的使用价值和理论指导意义.     

刚球模型气体热力学性质探讨

刚球模型气体，其状态方程为ＰＶｍ＝ＲＴ＋αＰ，是一种近似的实际气体，比理想气体复杂，比范德华气体简单，是物理化学中讨论的对象之一，其热力学性质有其特殊性，探讨它的热力学性质有重要意义。     

《热力学》中偏导数之间的变换方法

热力学是热现象的宏观理论，它是从几个基本实验定律出发，应用数学工具，通过逻辑演绎得出有关物质各种宏观性质之间的关系。实质上就是要导出实验可测的物理量(如物态方程，热容量等)和不可测的物理量(如内能，熵等)的热力学函数之间的关系。所以，在热力学理论中，偏导数之间的变换，是解决问题的关键，同时，也是学生在学习这门课程中的难点。本人结合多年来的教学体会，总结出了偏导数之间变换的五种方法。     

实际气体的玻尔兹曼因子方程

将玻尔兹曼分布律应用于实际气体紧靠容器壁处,厚度为气体分子有效作用距离s的边界区域保守力场中,用边界区域界面自由能作为状态参量之一,推导出实际气体的玻尔兹曼因子方程。进而应用该方程导出了理想气体物态方程、非理想气体物态方程、气体体系边界区域热力学函数和焦耳-汤姆逊效应的新解析。用与著名的范德瓦尓斯方程、维里方程对比分析的方式进一步论证了:玻尔兹曼因子方程不仅形式简单、物理意义明确,而且比范氏方程、维里方程更能如实地描写实际气体在各种压强条件下的自然状态、更具合理性与普遍性。     

罗朗展开在热力学中的应用

利用罗朗展开，将实际气体物态方程与Ｏｎｎｅｓ方程比较，得出几种情况下的维里系数表达式，并估计误差     

分子拓扑指数Sz与烷基苯热力学性质关系的研究

从距离矩阵出发，结合矩阵的数学运算，定义了一种新的拓扑指数Sz，并建立了拓扑指数与分子热力学性质关系的经验公式，计算了烷基苯48个分子热力学性质，并与文献值进行了比较，获得了比较理想的结果．     

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