分子反应散射的李代数处理

利用李代数方法构造反应散射系统Ｈ＋Ｈ＿２（α）→Ｈ＋Ｈ＿２（β）的动力学代数Ａ。按照这种代数可以导出系统的反应跃迁矩阵元Ｔ＿（αβ）及反应截面σ＿（αβ）的表达式。探讨了在跃迁过程中的选择定则。     

格蕴涵代数、MV-代数和有界可换的BCK-代数

本文证明了格蕴涵代数和有界可交换BCK-代数是两个等价的代数系统,以及MV-代数和有界可交换BCK-代数是两个等价的代数系统。     

R0代数公理系统的简化与独立性

研究了一类重要的模糊逻辑代数系统－－R0代数，给出了R0代数一系列基本性质及与其它一些模糊逻辑代数系统之间的关系，讨论了R0代数公理系统的简化问题，得到R0代数的两个特征定理，并证明了这两个特下定理中条件的独立性，由此得到R0代数两个独立的公理系统，研究结果表明，R0代数类和弱R0代数类都构成代数簇，即等式代数类，因而这两个代数类关于子代数、同态像以及直积是封闭的。     

关于形式系统Y^＊及R0-代数的若干结果

研究了模糊逻辑的形式演绎系统Y^*及R0-代数的性质，得到形式系统Y^*的两个更简捷的等价系统，证明了R0-代数的对偶代数是有界逆序对合BCK-代数，并给出关于R0-代数的一个重要反例，说明了R0-代数中V与→是各自独立的．     

关于形式系统L*及R0-代数的若干结果

研究了模糊逻辑的形式演绎系统L 及R0 代数的性质,得到形式系统L 的两个更简捷的等价系统,证明了R0 代数的对偶代数是有界逆序对合BCK 代数,并给出关于R0 代数的一个重要反例,说明了R0 代数中∨与→是各自独立的.     

3阶CI-代数

作为BCK/BCI/BCH-代数和BE-代数的推广,CI-代数是一类新的逻辑代数。构造CI-代数的实例是亟待解决的问题。扩张已有代数是构造新代数的重要方法。给出了两个扩张定理,分别把BE-代数扩张为BE-代数,把CI-代数扩张为CI-代数,并且给出了全部3阶的CI-代数,检验了3阶(2,0)型代数的81个乘法表,同构代数视作相等的,则仅有8个代数是3阶的CI-代数,为CI-代数的研究提供了重要实例。     

BR_0-代数与BCK-代数

讨论了BR0-代数与BCK-代数之间以及BR0-代数的滤子与BCK-代数的理想之间的关系,给出了BR0-代数可以诱导出一个有界BCK-代数,有界交换BCK-代数也可以诱导出一个BR0-代数,又以推论的形式得出了有界交换BCK-代数与MV-代数是两个等价的代数系统等结论.     

Hopf代数的自由积

给定两个Hopf代数,在它们代数自由积上,利用"代数延拓"的方法构造了余乘法、余单位和对极映射,从而证明两个Hopf代数的自由积还是Hopf代数.     

有界可交换的Griss-代数的一个刻画

设(X,*,V,0;≤)是一个有界可交换且满足B-2的Griss-代数,(X,*,0)是一个有界可交换的Bck-代数,证明了(X,*,V,0;≤)和(X,*,0)是两个等价的代数系统。     

关于局部顶点李代数的一点注记

根据局部顶点李代数的同态，可惟一地诱导出由它们分别构造所得的顶点代数之间同态的理论。进一步探讨了局部顶点李代数的概念。给出了关于局部顶点Poisson微分代数的两个命题，补充完善了这两个命题。详细解释了顶点李代数是局部顶点李代数的特例。     

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.     

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     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the