不分明拓扑空间的小归纳维数

不分明拓扑空间的小归纳维数周群（江苏教育学院数学系，南京２１００１３；作者，男，３４岁，讲师）文［１］给出拟子空间概念及边界概念，本文将Ｍｅｎｇｅｒ与Ｕｒｙｓｏｈｎ的维数引入不分明拓扑空间．定义设Ｓ为不分明Ｔ３空间的拟子空间，ｎ为大于或等于－１的整数...     

相对重分形的维数

本文将Julian Cole引入的一个概率测度关于另一概率测度的重分形形式体系里测度定义中的中心覆盖改为覆盖,得到与之等价的相对重分形测度和相同的维数,用两种不同方式定义了上、下盒维数,研究了各种维数的性质及相互关系,证明了相对重分形的Hausdorff维数函数和Packing维数函数是下凸的,讨论了它们在Legendre变换下的关系.     

一类逆极限序的极小集

通过公理Ａ＊研究了公理Ａ自覆盖映射的逆极限序的极小集，证明了其拓朴维数为零。     

0-维模糊拓扑空间

本文的主要工作是在模糊拓扑空间中引入了模糊E.ech O-维数以及模糊Урыcoн-Menger O-维数的概念,这是分明拓扑空间中的E.ech O-维数和Уpыcoн-Menger O-维数在模糊拓扑空间的推广。讨论了两种模糊O-维数的特征刻划及性质,得出了在T_1拟完全紧的模糊拓扑空间当中两种模糊O-维数之间的关系。     

Rd内自然覆盖族生成集的网测度及维数问题

研究单位立方体内自然网覆盖生成集的网测度及维数的可能性,建立该集族的自然覆盖网诱导的网测度与通常Hausdorff的等价性.其次,考虑在广义自相似集下,分离自然覆盖族生成情形的维数与Hausdorff维数的等价性,简化部分分形集的计算.     

关于G_C-平坦维数

在任意结合环上引入了模的覆盖G_C-平坦维数,对G_C-平坦模类的投射可解性给出刻画.证明了模的G_C-平坦维数不超过其覆盖G_C-平坦维数,并且在GF_C闭环上二者相等.     

Gorenstein平坦维数

设W是包含所有内射模的模类. 通过在任意结合环上引入模的覆盖W-Gorenstein平坦维数, 刻画W-Gorenstein平坦模类的投射可解性, 并证明了: 对任意R 模M和任意正整数n, 若模M的覆盖W-Gorenstein平坦维数为n, 则存在R 模的正合列0→K→H→M→0, 其中[WT]fd(K)=n-1, H是W-Gorenstein平坦模; W- Gorenstein平坦维数不超过覆盖W-Gorenstein平坦维数, 且当覆盖W-Gorenstein平坦维数有限时, 二者相等.     

W-Gorenstein平坦维数

设W是包含所有内射模的模类.通过在任意结合环上引入模的覆盖W-Gorenstein平坦维数,刻画W-Gorenstein平坦模类的投射可解性,并证明了:对任意R-模M和任意正整数n,若模M的覆盖W-Gorenstein平坦维数为n,则存在R-模的正合列0→K→H→M→0,其中fd(K)=n-1,H是W-Gorenstein平坦模;W-Gorenstein平坦维数不超过覆盖W-Gorenstein平坦维数,且当覆盖W-Gorenstein平坦维数有限时,二者相等.     

Hausdorff维数的一个等价定义及其推广

从二进制坐标网覆盖集的角度出发给出Hausdorff维数的一个等价定义,并推广了给出的定义,指出若用一般的坐标网覆盖集,得到的也是与Hausdorff维数相同的值.     

图像的分形维数计算方法及其应用

分形几何给人们提供了研究不规则几何对象的思想和方法 ,分形维数能够表征自然界中所获取的图像的某些特性 ,这已经得到了广泛的研究和认可 本文基于计算机图像的存储原理 ,研究了分形维数的计算方法 ,给出了计算图像分形维数的象素点覆盖法 作为实际应用例子 ,在水泥沙浆单轴压载过程中 ,应用电子扫描镜拍摄了不同应力应变情况下的损伤形貌 ,计算了各阶段损伤区域的分形维数 ,从某种意义上揭示了材料损伤及其演化发展的特性     

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)

正~~     

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