流体流动作功装置的生态学优化性能

在非线性流阻的影响下,流体流动作功装置的输出功率与功率损耗必须兼顾,而应用生态学优化准则可达此目的．并求出装置的生态学优化性能,进一步阐明了生态学优化准则的重要意义．所得结论对流体流动作功装置的优化设计和最佳工况选择有指导意义．     

卡诺热机的火用经济和生态学优化准则

研究存在热阻和热漏的卡诺热机的火用经济和生态学优化准则，得到一些新的性能参数，并揭示了这两种准则之间的联系．     

斯特林致冷循环致冷率与熵产生率的协调优化性能

在牛顿传热律下,考虑了斯特林致冷机中热阻的不可逆性和回热损失的不可逆性,利用生态学准则函数E,研究了致冷率与熵产生率协调的整体优化性能,导出了致冷率R与致冷系数ε的优化准则,并对最佳输入功率,回热损失等其它性能进行了优化分析与讨论,为斯特林致冷机的优化设计以及最佳工作状态的选择提供了一种新方案。     

另一类传热规律下三热源热泵的生态学优化性能

以生态学函数为目标，研究传热规律为ｑ Δ（１／Ｔ）的三热源热泵的优化性能，获得一些新的性能界限，结果表明，生态学优化准则可使三热源热泵的供热率和火用耗散率达到最佳的折衷，从经可为热泵的优化设计和最佳工况选择提供新理论指导。     

一类斯特林制冷机的生态学优化准则

应用生态学准则函数Ｅ＝Ｒ－εＣＴ０σ,讨论斯特林制冷机的优化准则,从而为斯特林制冷机的优化设计和最佳工况的选择提供些新的理论指导．     

一类三热源制冷机的生态学优化准则

以生态学准则函数为目标，研究一类三热源制冷机的优化性能．导出制冷机的一些新性能参数，为制冷机的最佳工况选择提供了一个新方案，对制冷机的优化设计有指导意义．     

Q∝Δ（T^n）时广义不可逆卡诺热机的生态学性能优化

以反映热机功率与熵产率之问最佳折衷的“生态学”准则为目标，根据生态学优化方法研究传热规律服从Q∝Δ(T^n)时不可逆卡诺热机生态学最优性能．在内可逆模型基础上，用常数项q表示热漏流率，用常数项Φ表示除热阻和热漏以外的其余不可逆性，导出了传热规律服从Q∝Δ(T^n)时广义不可逆卡诺热机生态学优化性能．通过数值计算对不同损失、不同传热规律情况下的热机生态学性能变化规律进行了比较分析，本文结果对实际热机的设计工作具有一定的理论指导意义．     

关于三热源制冷同生态学性能的优化讨论

本文应用统一的生态学准则函数对报价牛顿传热规律的三热源制冷机的生态学性能进行了研究，得出了生态学最优性能时的制冷系数、制冷率和熵产率。并将两种生态学最优性能理论方法进行了比较。     

关于三热源制冷机生态学性能的优化讨论

本文应用统一的生态学准则函数对服从牛顿传热规律的三热源制冷机的生态学性能进行了研究，得出了生态学最优性能时的制冷系数、制冷率和熵产率。并将两种生态学最优性能理论方法进行了比较     

斯特林制冷机整体性能的一种优化方案

考虑斯特林制冷机存在热阻和回热损失的不可逆性，根据有限时间热力学的分析方法，在牛顿传热定律下，研究了制冷机的整体优化性能，引入生态学目标函数E，导出了制冷系数ε，制冷率R和熵产率σ的优化准则，并对最佳输入功率，回热损失和回热效率等性能进行了分析讨论。     

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