有限极Fourier—Airy积分算子及性质

本文考虑具非Ｃ＾∞象征类的Ｆｏｕｒｉｅｒ－Ａｉｒｙ积分算子，称之为ｌ级Ｆｏｕｒｉｅｒ－Ａｉｒｙ积分算子（ｌ＜＋∞），讨论了渐近展开，估计和复合。     

用Fourier变换求半平面不连续位移的基本解

利用Ａｉｒｙ应力函数和Ｄｉｒａｃ ｄｅｌｔａ广义函数，采用Ｆｏｕｒｉｅｒ变换的方法导出了全平面和半平面集中不连续位移的基本解，由于利用了积分变换表，本文的推导过程十分简单。     

原位反应生成Al-Fe/Al_2O_3,Al-Cu/Al_2O_3复合材料的过程原理

采用喷射共沉积法制备了Ａｌ－Ｆｅ２Ｏ３及Ａｌ－ＣｕＯ复合体，Ｆｅ和Ｃｕ的质量分数分别为９．６０％和５．５０％．在热处理过程中，随着温度由６００℃升高到８００℃和１０００℃，Ｆｅ３Ｏ４按Ｆｅ３Ｏ４ＦｅＯＦｅ顺序被还原，得到Ａｌ－Ｆｅ／Ａｌ２Ｏ３复合材料，其中Ｆｅ以Ａｌ１３Ｆｅ４相及ＡｌＦｅ相形式存在．Ａｌ２Ｏ３粒度为２～４μｍ均匀分布在基体中．Ａｌ／ＣｕＯ复合体在９００℃处理后，形成Ａｌ－Ｃｕ／Ａｌ２Ｏ３复合材料．文中对显微结构形成、反应进行的过程作了分析．     

快凝Al—Fe—V—Si—Nd合金中亚稳相Al8Fe4Nd的价电子结构及 …

应用固体与分子经验电子理论,对快凝（ＲＳ）Ａｌ－Ｆｅ－Ｖ－Ｓｉ－Ｎｄ合金中的复杂相Ａｌ８Ｆｅ４Ｎｄ的价电子结构进行了计算分析,并研究了相变温度与键络断开温度的关系,计算显示在Ａｌ８Ｆｅ４Ｎｄ合金相中存在１２种共价键,Ｆｅ－Ｆｅ,Ａｌ（１）＿Ａｌ（１）,Ｆｅ－Ａｌ（２）,Ａｌ（１）－Ａｌ（２）键属于强键集团,Ｆｅ－Ａｌ（１）,Ａｌ（２）－Ａｌ（２）,Ａｌ（１）－Ａｌ（１）,Ｎｄ－Ａｌ（１）,Ｎｄ－Ａ     

在Na3AlF6-AlF3-CaF2-LiF-Al2O3体系中低温铝电解

研究了Ｎａ３ＡｌＦ６－ＡｌＦ３－ＣａＦ２－ＬｉＦ－Ａｌ２Ｏ３熔盐体系的物化性质，包括液相线温度、电导率和密度，并选择体系中的低分子比电解质在１００Ａ垂直排铝式电解槽上进行了电解制铝。     

Fourier-Laplace级数线性平均的局部化

研究了球面上借助于下三角陈Ａ确定的Ｆｏｕｒｉｅｒ－Ｌａｐｌａｃｅ级数性求和法的局部化问题,得到了Ｆｏｕｒｉｅｒ－Ｌａｐｌａｃｅ级数局部线性可和的充分条件。     

Fe-M(M=Al,Nb,Si)的机械合金化研究

采用Ｘ射线衍射、扫描电镜、显微硬度测试等多种分析测试手段研究了纯元素混合粉末Ｆｅ５０Ａｌ５０、Ｆｅ５０Ｎｂ５０及Ｆｅ７５Ｓｉ２５的机械合金化过程．结果表明：球磨３０ｈ后，Ｆｅ５０Ｎｂ５０转变为非晶结构，Ｆｅ７５Ｓｉ２５粉末形成具有ｂｃｃ结构的α－Ｆｅ（Ｓｉ）固溶体，Ｆｅ５０Ａｌ５０的球磨产物为α－Ｆｅ（Ａｌ）＋Ｆｅ３Ａｌ＋Ａｌ１３Ｆｅ４三组混合结构．延－延组合的Ｆｅ５０Ａｌ５０及Ｆｅ５０Ｎｂｂ２５０形成具有层片复合结构的粉末．其显微硬度在球磨初期迅速增高，延长球磨时间，增高速度减慢最后趋于稳定．而延－脆组合的Ｆｅ７５Ｓｉ２５粉末在球磨初期则形成具有弥散复合结构的粉末，其粒度变化在球磨初期与Ｆｅ５０Ａｌ５０及Ｆｅ５０Ｎｂ５０不同，无明显增大趋势．对Ｆｅ－Ｍ机械合金化的产物进行了热力学分析．     

Hα空间中的函数逼近度

用Ｆｏｕｒｉｅｒ级数和Ｔｃｈｅｂｙｃｈｅｆｆ－Ｆｏｕｒｉｅｒ级数的（Ｈ）算子，证明了一个新定理。本文的结果包含了一些作者的最新成果，尤其文「２」中的定理Ａ是本定理推论中的一个非常特殊的情形。     

两种快凝AlFeX（V，W）Si合金的组织性能

采用喷射沉积坯轧制和ＲＳ／ＰＭ粉末挤压坯轧制的２种工艺制各了Ａｌ－８．５Ｆｅ－１．３Ｖ－１．７Ｓｉ和Ａｌ－８．５Ｆｅ－１．３Ｗ－１．７Ｓｉ合金的板材，并通过透射电镜，扫描电镜和力学拉伸实验研究了板材的组织性能．结果表明，综合性能ＡｌＦｅＷＳｉ合金优于ＡｌＦｅＶＳｉ合金的喷射沉积坯轧制板材．     

极大奇异积分算子的加权模不等式

使用Ｆｏｕｒｉｅｒ变换的估计，建立了一类粗糙核的奇异积分算子及其极大算子的加权Ｌ＾ｐ模不等式。     

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