形式三角矩阵半环的Jordan双导子

研究了形式三角矩阵半环Tri(R,M,S)的Jordan双导子,给岀了形式三角矩阵半环Tri(R,M,S)的Jordan双导子的等价刻画,进而证明了在某些条件下形式三角矩阵半环Tri(R,M,S)的每一个Jordan双导子都是双导子.     

形式三角矩阵半环的导子与高阶导子

研究了形式三角矩阵半环Tri(R,M,S)的导子和高阶导子.证明了半环Tri(R,M,S)的任一导子可由半环R,S的导子和(R,S)-双半模M的一个拟同态来表示;半环Tri(R,M,S)的任一高阶导子可由半环R,S的高阶导子和(R,S)-双半模M中满足一定条件的一族可加映射来表示.     

形式三角矩阵半环的广义导子

半环理论是代数理论上研究的热点问题。近年来,越来越多的研究人员注意到了半环理论在数学及其他研究领域的运用也非常普遍,在这些其他学科中有着广泛的应用。研究了形式三角矩阵半环Tri (A,M,B)上的广义导子的定义和表示形式。给出了半环上双半模上的拟同态映射f的定义。证明了半环Tri (A,M,B)上的任意的一个广义导子可以由半环A,B上的广义导子和(A,B)-双半模M上的一个拟同态映射来表示。     

关于上三角矩阵代数的Jordan导子

探讨交换半环上的上三角矩阵代数的Jordan导子,并证明了交换半环R上的上三角矩阵代数Tn(R)到Tn(R)-双模M的每个Jordan导子都可分解成一个导子和一个反导子之和.     

关于上三角矩阵代数上的导子系

设U=Tri(A,M,B)是上三角矩阵代数。利用算子论的方法讨论了上三角矩阵代数上的Jordan导子系,证明了上三角矩阵代数上的Jordan导子系都是上三角矩阵代数上的导子系,从而给出上三角代数上Jordan导子系的一种新的刻画。     

三角代数上广义双导子的等价刻画

设U=Tri(A,M,B)是三角代数，双线性映射#是U上的广义双导子。本文利用算子论的方法讨论了三角代数上的广义双导子的相关性质，并在此基础上给出了三角代数上广义双导子的一种新的刻画。     

关于矩阵半环的导子

探讨交换半环上矩阵半环的导子,证明了交换半环R上矩阵半环的导子均可表为一个内导子和R的一个诱导导子之和.     

三角代数上的Jordan内导子

设(u)=Tri(A,M,B)是三角代数,引入三角代数(u)上的Jordan导子和内导子的概念,利用算子论的方法证明三角代数(u)上的Jordan导子是三角代数彩上的内导子.从而推广了三角代数(u)上的Jordan导子的定义.     

可换环上严格上三角矩阵代数的若当导子

令R是含有单位元1且2为其可逆元的可换环,M(n,R)表示R上所有n×n阶矩阵形成的代数,N(n,R)表示R上所有严格上三角矩阵所形成的M(n,R)的子代数.本文具体刻画了N(n,R)上的任一若当导子,即N(n,R)的每一个若当导子均可被唯一地分解为内导子、对角导子和中心导子之和.     

三角代数上的一类局部可导非线性映射

设T=Tri(A,M,B)为三角代数,δ:T→T是一个映射(没有可加性的假设).利用代数分解的方法证明了:如果对任意的A,B∈T,且A与B至少有一个是幂等元,有δ(AB)=δ(A)B+Aδ(B),则δ是一个可加导子.并得到了上三角矩阵代数和套代数上此类局部可导非线性映射的具体形式.     

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.     

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.     

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.     

A computer generator for randomly layered structures

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

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.     

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

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.     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to