E~n中有限点集的一个不等式

设ＧＮ＝｛Ｐ１，Ｐ２，…，ＰＮ｝是Ｅｎ中一个点集（Ｎ＞ｎ≥２），Ｐ是Ｅｎ中一点，ｍｉ是相应于Ｐｉ的正数（ｉ＝１，２，…，Ｎ）。若Ｐｉ１，Ｐｉ２，…，Ｐｉｋ是取自ＧＮ的点，ｋ维单形｛Ｐ，Ｐｉ１，Ｐｉ２，…，Ｐｉｋ｝的体积是ＶＰＰｉ１…Ｐｉｋ。令Ｍｋ＝∑∑…∑ｉ１＜ｉ２＜…＜ｉｋ（ｍｉ１ｍｉ２…ｍｉｋＶ２ＰＰｉ１…Ｐｉｋ（１≤ｋ≤ｎ）。则有ＭｌｋＭｋｌ≥［（ｎ－ｌ）！（ｌ！）３］ｋ［（ｎ－ｋ）！（ｋ！）３］ｌ（ｎ！）ｌ－ｋ（１≤ｋ＜ｌ≤ｎ），Ｍ２ｋ≥（ｋ＋１ｋ）３ｎ－ｋ＋１ｎ－ｋＭｋ－１Ｍｋ＋１（１≤ｋ≤ｎ）。上述不等式当且仅当矩阵（（ｍｉｅｉ，ｍｊｅｊ））Ｎ×Ｎ的非零特征值相等时成立等号，此处（ｍｉｅｉ，ｍｊｅｊ）表示内积，ｅｉ＝ＰＰｉ（ｉ＝１，２，…，Ｎ）。     

关于单形内点的一个猜想的证明与加强

设Ａ为ｎ维欧氏空间Ｅｎ中的单形,且Ａ的ｎ维体积为Ｖ,Ｐ为Ａ的内部任意一点,点Ｐ到Ａ的ｎ＋１个ｎ－１维超平面的距离为ｄ１,ｄ２,…,ｄｎ＋１,则可证明、推广并加强如下不等式∑１≤ｉ１＜ｉ２＜…＜ｉｎ≤ｎ＋１ｄｉ１ｄｉ２…ｄｉｎ≤（ｎ＋１）！ｎｎ（ｎ＋１）ｎ＋１Ｖ,当且仅当点Ｐ为正则单形Ａ的重心时等号成立．     

n维Oppenheim不等式及其应用

设ａ＿ｉ（ｉ＝１，２，３）为三角形ΔＡ＿１Ａ＿２Ａ＿３的边长，Ｓ为ΔＡ＿１Ａ＿２Ａ＿３的面积，λ＿ｊ（ｊ＝１，２，３）为任一组正数．作者将Ｏｐｌｓｏｎｂｅｉｍ三角形不等式推广到ｎ维欧氏空间Ｅ￣ｎ中的ｎ维单形，从而获得了ｎ维单形的Ｏｐｐｅｎｂｅｉｍ不等式这里Ｖ是ｎ维单形Ａ＿１Ａ＿２…Ａ＿（ｎ＋１）的体积，Ｖ＿ｉ为顶点Ａ＿ｉ所对之侧面的面积，λ＿ｉ为任意一组正数．     

时间序列引出的数学问题(Ⅱ)

Ｘ′＝（ｘ１，ｘ２…，ｘｎ），问在∑ｎｉ＝１ｘ２ｉ≤１条件下，ａ３＝∑ｎ－２ｉ＝１ｘｉｘｉ＋２，ａ５＝∑ｎ－１ｉ＝１ｘｉｘｉ＋１，当Ｘ取遍∑ｎｉ＝１ｘ２ｉ≤１上的点，（ａ３，ａ５）在平面上构成怎样的图形？该文对ｎ＝４给出解析解     

一类N阶常微分方程解的平方可积性与有界性

本文考虑ｎ阶微分方程：（ｒ（ｔ）ｙ（ｎ－１））’＋ｎ－２∑ｉ＝０ａｉ（ｔ）ｙ（ｉ）＝ｆ（ｔ,ｙ）借助积分不等式,得到了该方程的所有解属于 Ｌ２［０,∞）及有界的充分条件．     

关于n维单形宽度的一个结果

证明了关于ｎ维单形宽度的一个不等式，结果是Ｗ≤（ｓｉｎθ）＾１／２αｎ（１／ｎ＋１Σ↑ｎ＋１↓ｉ＝１Ｒｉ＾２）＾１／２。这一结果蕴含并推广了Ｓａｌｌｅｅ－Ａｌｅｘａｎｄｅｒ定理。     

n阶树的指数分布

设Ｔｎ表示全体ｎ阶树所构成的集合，记Ｔ（ｎ，ｄ）＝（Ｔ∈Ｔｎ│Ｔ中恰有ｄ（≥１个环），本文证明了Ｔ（ｎ，ｄ）的本质指数集合为Ｓｎｄ，为：Ｓｎｌ＝（２，４，．．．２ｎ－２）；Ｓｎ，ｄ＝（２，３，．．．，ｎ－１）∪（ｎ，ｎ＋１，．．．，２ｎ－２ｄ）∩（２ｉ│ｉ＝１，２，．．．ｎ－ｄ）（ｄ≥２）。并证明了Ｔ（ｎ，ｄ）的幂敛指数集Ｓｎ＝（２，３，．．．ｎ－１），进一步刻划了Ｔ（ｎ，ｄ）中本原指数达到２ｎ－     

关于黎曼流形的超曲面

获得如下定理：假设Ｍ＾ｎ是ｎ＋１的维黎曼流形Ｎ＾ｎ＋１的ｎ维超曲面,那么Ｍ＾ｎ是极小的当且仅当等式：ｎＨ∑λＩ＋－Ｎ｜ｈ｜∑｜λｉ｜＝－ｎ｜Ｈ｜（ｎＳ）＾１／２成立。     

Levy不等式的推广

设Ｂ为一可分的赋范空间（Ｘｉ）ｉ＝１是Ｂ值独立，对称的随机元Ｓｎ＝ｘ１＋．．．Ｘｎ（ｎ〉１），若Ｑ（ｎ）是（１，２，．．．ｎ）的一些子集构成的集合并使，对Ｑ（ｎ）中任意两个元素Ｍ，Ｎ都有Ｍ∩Ｎ等于Ｍ，Ｎ或Х则我们有Ｐ（ω：ｓｕｐ‖∑Ｘｉ‖〉ｔ）≤２Ｐ（‖Ｓｎ‖〉ｔ）。     

极限^lim n→∞（1＋1／n）^n=e的一种证明

利用柯西不等式ｎ√ａ１ａ２…ａｎ≤１／ｎ（ａ１＋ａ２＋…ａｎ） （ａｉ〉０，１≤ｉ≤ｎ）， ＾ｌｉｎ ｎ→（１＋１／ｎ）ｎ＝ｅ的存在性证明。     

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.     

Jane Eyre——A Feminist In The 19th Century

In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.     

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

正~~