“建立非等谱发展方程族的方法”一文的注释

推广了文［１］的结果，给出了建立与已知等谱问题（λ＿ｔ＝０）相对应的非等谱（λ＿ｔ＝ｓλ￣（ｎ＋ｄ））发展方程族的方法。寻找一初始Ｌａｘ算子Ｗ＿０和初始向量场ｇ＿０，并使它们满足方程［Ｗ＿０，Ｌ］＝Ｌ′［ｇ＿０］－ｓＬ￣ｄ是此方法的关键所在。作为例，给出了非等谱（λ＿ｔ＝λ￣（ｎ＋１））的色散长波和Ｂｏｕｓｓｉｎｅｓｑ发展方程族。     

局部凸空间上的谱算子

推广了Ｂａｎａｃｈ空中谱测度、可测函数关于谱测度的积分、谱算子及其约当分解到局部凸空间．得到定理１设Ｔ∈Ｌ（Ｘ）为谱算子，Ｅ（）为其单位分解．定义算子Ｓ＝Φ（λ），其中λ代表函数ｆ（λ）＝λ，称Ｓ为Ｔ的标部．则（ｉ）Ｄ（Ｓ）在Ｘ中稠，且Ｓ是一个闭线性算子．（ｉ）当Ｔ∈Ｌｂ（Ｘ）时，Ｓ∈Ｌ（Ｘ），且Ｎ＝Ｔ－Ｓ是一拟幂零算子，ＮＳ＝ＳＮ．（ｉｉ）在Ｄ（Ｓ）上成立Ｔ＝Ｓ＋Ｎ，其中Ｎ满足：任意有界闭集ｅ∈ΣＰ，ＮＥ（ｅ）Ｘ是一拟幂零算子，且ＳＮ＝ＮＳ在Ｘ的某稠密子空间上成立     

Gn的一种完全因子

设ｎ＝２＾λ－１＋ｔ，λ〉２，０≤ｔ〈２＾λ－１。反馈函数ｘｎ＝ｆ（ｘ０，ｘ１，…，ｘｎ－１）＝１＋ｘ０＋Σｉ∈Ｉｔ（ｘｉ＋ｘｎ－ｉ）产生ｎ阶ｄｅ Ｂｒｕｉｊｎ－Ｇｏｏｄ图Ｇｎ的一个完全因子ＰＦλ（２＾λ－１＋ｔ）其中Ｉｔ＝｛ｔ；（ｔｉ）是奇整数，１≤ｉ≤ｔ｝。     

关于矩阵行列式与迹的一个不等式

本文证明了ｎ阶半正定Ｈｅｒｍｉｔｉａｎ矩阵Ａ≥Ｂ的特征值不等式∑Ｋｔ＝１ａｒｔ（Ｂ）∑Ｋｔ＝１ａｒｔ（Ａ）≥∏Ｋｔ＝１λｒｔ（Ｂ）∏Ｋｔ＝１λｒｔ（Ａ）     

分数阶积分方程

对分数阶微分方程的初值问题所对应的分数阶积分方程ｚ（ｔ）＝∑ｌｋ＝０Ｃｋｋｌｔｋ＋（－λ）Γ（α）∫ｔ０（ｔ－ｓ）α－１ｚ（ｓ）ｄｓα≥１ｚ（ｔ）＝∑２ｌ－１ｋ＝０ＣｋГ（１＋ｋα２ｌ）ｔｋα／２ｌ＋（－λ）Г（α）∫ｔ０（ｔ－ｓ）α－１ｚ（ｓ）ｄｓｌ＝０，１，２，…α≥１利用Ｍｅｌｉｎ变换和Ｆｏｘ函数求出的解为ｚ（ｔ）＝∑ｌｋ＝０∑∞ｎ＝０Ｃｋ（－λ）ｎГ（１＋ｋ＋ｎα）ｔｋ＋ｎα和ｚ（ｔ）＝∑２ｌ－１ｋ＝０Ｃｋ∑∞ｎ＝０（－λ）ｎГ（１＋ｎα＋ｋα２ｌ）ｔｎα＋ｋα２ｌ     

微分算子谱结构

本文讨论了微分算子Ｄ＝ｄ／（ｄｔ）－Ａ（ｔ）的谱结构，这里ｄ／ｄｔ是对ｎ元向量取的，Ａ（ｔ）的ｎ阶方阵。Ｓａｃｋｅｒ和Ｓｅｌｌ曾引进线性微分方程系的谱概念．我们先讨论这个谱概念与算子谱概念的联系与差别，在此基础上建立算子Ｄ的谱结构．同时讨论了连续谱、剩余谱及点谱的存在与数目问题，还讨论了特征值和特征向量问题．     

积分C－半群及其谱映射定理

第一节在没有指数有界的假设条件下，讨论了积分Ｃ－半群的一些性质，以及积分Ｃ－半群与Ｃ－半群的关系，推广了［５，定理２］。第二节讨论了积分Ｃ－半群的谱映射定理。主要结果如下：设Ａ为积分Ｃ－半群｛Ｔ（ｔ）｝的生成元，ρｃ（Ａ）≠Φ，则（ｉ）ｔ＞０（ｉｉ）（ａ）反之，若存在ｘ∈Ｘ，ｘ≠０，使得对任何ｔ＞０那么，（Ａ）。（ｂ）若（Ａ），则对任何ｔ＞０，ｔ（Ｔ（ｔ）Ｃ－１）。反之，若对任何ｔ＞０，ｔ（Ｔ（ｔ）Ｃ－１），且存在Ｘ∈Ｘ，Ｘ≠０，使得Ｔ（ｔ）Ｃｘ＝ｔＸ，则，０（Ａ）（ｉｉｉ）｛（ｔ）。     

非定常线性系统的稳定性与不稳定性

本文讨论非定常线性系统的稳定性和不稳定性．我们推广了文［２］的结果，证明了对Ｘ’＝Ａ（ｔ）ｘ，当Ａ（ｔ）的特征根λｉ（ｔ）有Ｒｅλ（ｔ）≤－ａ＜ｏ，ｉ＝１，…，ｋ，Ｒｅλｉ（ｔ）≥ａ ＞ｏ，ｉ＝ｋ＋１，…，ｎ，且Ａ（ｔ）的变化率很小时，Ｘ’＝Ａ（ｔ）ｘ有ｋ维解空间其解指数型收敛，ｎ－ｋ维解空间其解指数型发散．我们还用出了Ａ（ｔ）的变化率界的估计，并将此结果应用于大系统的稳定性分解．     

M/M/1 排队模型的谱隙公式

研究Ｍ／Ｍ／１排队矩阵Ｑ的特征值的分布状况,得到一个谱隙公式：λ１＝２（ａ＋ｂ）－γ（Ｑ）,其中ａ,ｂ〉０分别是顾客的到达率和服务率,γ（Ｑ）是Ｑ的谱半径;并证明了－Ｑ特征值（除０外）关于ａ＋ｂ对称分布。     

拟生双曲组某定解问题整体光滑解的存在性

讨论如下问题：δｒ／δｔ＋λ１（ｒ,ｓ）δｓ／δｔ＋λ２（ｒ,ｓ）δｓ／δｘ＝０,［ｆ（ｒ,ｓ）］ｘ＝ｘ（ｔ）＝Ａ（ｔ）,［ｒ－ψ（ｓ）］ｘ＝ｘ（ｔ）＝０,其中λ１（ｒ,ｓ）与λ２（ｒ,ｓ）是已知函数,ｘ＝ｘ（ｔ）是非特征曲线,Ａ（ｔ）＝ｄｘ／ｄｔ,ｆ（ｒ,ｓ）及ψ（ｓ）是已知的可微函数。求解区域是Ｈ＝［（ｘ,ｔ）│（ｘ〉ｘ（ｔ）,Ａ↓ｔ｝。在适当的假设下,文中采用速矢端变换,证明了上述问题的整体     

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