混合法合成二阶氯化铁-石墨层间化合物的研究

在前期合成纯一阶ＦｅＣｌ３－ＧＩＣ工作的基础上,设计了混合法合成二阶ＦｅＣｌ３－ＧＩＣ的实验方案,考察了反应温度、Ｃ和ＦｅＣｌ３摩尔比ｎ（Ｃ）／ｎ（ＦｅＣｌ３）,保温时间对产物阶结构的影响。首次用混合法合成了纯二阶Ｆｅ－Ｃｌ３－ＧＩＣ,确立了其最佳反应条件。     

环丁烯-1,2-二酮衍生物分子的超极化率和电子相关效应

用ｓｂ ｉｎｉｔｉｏ／有限场方法在４－３１Ｇ＋ｐｂ／ｐ水平上计算了三个环丁烯－１,２－二酮衍生物分子的偶极矩μ,线性极化率α,一阶超极化率β和二阶超极化率γ,计算表明,分子构型的优化水平,如ＲＨＦ／６－３１Ｇ＾＊＊和ＭＰ２／６－３１Ｇ＾＊８。对计算结果影响较小,而ＭＰ２电子相关能校正引起高阶极化率的较大改变。     

Properties of Lattice-Limit of a Sequence on ×-Lattice

ＰｒｏｐｅｒｔｉｅｓｏｆＬａｔｔｉｃｅ－ＬｉｍｉｔｏｆａＳｅｑｕｅｎｃｅｏｎ×－ＬａｔｔｉｃｅＺｈａｎｇＧｕａｎｇｑｕａｎ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｈｅｍａｔｉｃｓ，ＨｅｂｅｉＵｎｉｖｅｒｓｉｔｙ，Ｂａｏｄｉｎｇ０７１００２）ＭｅｎｇＸｉａｎｌ...     

钠锰辉石自旋禁戒谱的理论研究

建立了ｄ５（Ｃ２）完全强场能量矩阵，使其对角化，解释了Ｇｈｏｓｅ等观察到的销锰辉石自旋禁戒谱的跃过机制。理论结果表明，这些谱带是由于处在Ｃ２对称晶位的Ｆｅ３＋和Ｍｎ２＋离子发出的。这与Ｇｈｏｓｅ等的估计是一致的。但是，Ｇｈｏｓｅ等在２５０００ｃｍ－１附近观察的谱带与我们的结果不同，该谱带可能是除Ｆｅ３＋和Ｍｎ２＋离子外的其它离子发出的。     

国产空间实用太阳电池抗质子辐射性能研究

研究了国产卫星用背场Ｓｉ太阳电池和ＧａＡｓ／Ｇｅ太阳电池性能随质子辐照注量１×１０９ －５ × １０１３ ｃｍ－２的变化．实验表明,２种太阳电池的电性能随辐照注量增加有不同的衰降趋势．背场 Ｓｉ太阳电池性能参数短路电流Ｉｓｃ和最大输出功率Ｐｍａｘ衰降变化快,辐照注量为２ × １０１０ｃｍ－２时, Ｐｍａｘ就已衰降为原值的７５％,而ＧａＡｓ／Ｇｅ太阳电池对应相同的衰降辐照注量达８×１０１１ｃｍ－２,且 Ｉｓｃ和Ｐｍａｘ衰降变化起初缓慢,当辐照注量接近３ × １０１２ ｃｍ－２时才迅速下降．背场Ｓｉ太阳电池性能 衰降与质子辐照引入的Ｅｖ＋０．１４ ｅＶ和Ｅｖ＋０．４３ ｅＶ深能级有关,而ＧａＡｓ／Ｇｅ太阳电池性能衰降 与辐照产生的Ｅｃ－０．４１ ｅＶ深能级有关．     

一类非凸自治二阶Hamilton系统的极小周期解

本文通过比较泛函的极小临界点和平凡临界点的Ｍｏｒｓｅ指标，得到一个关于非凸自治二阶Ｈａｍｉｌｔｏｎ系统非常值极小周期解的存在性定理。     

碱金属夹层对半导体异质结能带偏移的影响

用光电发射的方法研究了碱金属夹层对Ｇｅ和Ⅲ－Ⅴ族半导体异质结形成和能带偏移的影响．实验表明，价带偏移（ΔＥｖ）与夹层厚度有关．０．５ＭＬＣｓ和１ＭＬＮａ可使Ｇｅ／ＩｎＰ（１００）及Ｇｅ／ＧａＡｓ（１００）的ΔＥｖ的值分别增加０．２０ｅＶ和０．１８ｅＶ．碱金属与衬底相互作用而引起的界面偶极矩的改变是导致ΔＥｖ改变的主要原因．     

Fe-Mn-Si形状记忆合金fc(γ)→hcp(ε)马氏体相变温度的热力学预报

借助于Ｆｅ－Ｍｎ－Ｓｉ合金层错几率Ｐｓｆ的Ｘ射线测量,计算了Ｐｓｆ与合金成分的关系,得到Ｆｅ－Ｍｎ－Ｓｉ三元系的１／Ｐｓｆ表达式．结合层错形核的热力学模型,经回归得Ｆｅ－Ｍｎ－Ｓｉ合金ｆｃ（γ）→ｈｃｐ（ε）马氏体相变的临界相变驱动力和Ｐｓｆ的关系式,进而得到临界相变驱动力与合金成分的关系．借助Ｐｓｆ建立了成分与相变驱动力之间的关系,结合有关热力学分析计算得到的Ｆｅ－Ｍｎ－Ｓｉ合金γ和ε两相Ｇｉｂｂｓ自由能曲线,预报了Ｆｅ－Ｍｎ－Ｓｉ三元系合金的ｆｃｃ（γ）→ｈｃｐ（ε）马氏体相变的温度．     

图的第二个最小特征值的界

设Ｇ是ｎ个顶点的简单图，λｎ－１（Ｇ）为Ｇ的第二个最小特征值。Ｇ的非孤立点形成的图记为Ｇ１，Ｖ（Ｇ１）＝ｓ，（３≤ｓ≤ｎ）。本文主要证明了：ａ．若Ｇ１不是完全偶图，则λｎ－１（Ｇ）≤λｓ－１（Ｋ２，ｓ－２＾－ｅ），等式成立＝Ｇ１≌Ｋ２，ｓ－２＾－＾ｅ。其中图Ｋ２，ｓ－２＾－＾ｅ为完全偶图Ｋ２，ｓ－２去掉一边ｅ而得到的图ｂ．若Ｇ１既不是完全偶图，又不是Ｋ２，ｓ－２＾－ｅ，则λｎ－１（Ｇ）＜－√２／２     

DNA as Vacine or Therapeutic Against Cancer and Viral Infections

ＭｏｅｌｉｎｇＫ．ＰａｖｌｏｖｉｃＪ．ＳｃｈｕｌｔｚＪ．ＮａｗｒａｔｈＭ．ＰｅｔｒｚｌｋａＤ．（ＩｎｓｔｉｔｕｔｅｏｆＭｅｄｉｃａｌＶｉｒｏｌｏｇｙｏｆｔｈｅＵｎｉｖｅｒｓｉｔｙｏｆｚｕｒｉｃｈ，Ｇｌｏｒｌａｓｔｒａｓｅ３０，ＣＨ－８０２８Ｚｕｒｌｃ...     

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.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

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.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

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