关于正定矩阵行列式的Minkowski不等式

设Ａ、Ｂ、Ｃ为实对称正定矩阵，ａ、ｂ、α为正数，且ａ≥｜Ａ｜＞ａ｜ｅ｜，｜Ｂ｜＞ｂ｜Ｃ｜，本文证明了。［｜Ａ＋Ｂ｜－（ａ＋ｂ）｜Ｃ｜］≥［｜Ａ｜－ａ｜Ｃ｜］＋［｜Ｂ｜－ｂ｜Ｃ｜］，推广了文［１］、［２］的结果．     

邻域并和[A,B]—覆盖图

设ａ≤ｂ是整数，Ｇ＝（Ｖ（Ｇ），Ｅ（Ｇ）是一个图。Ｇ的一个支撑子图Ｆ称为Ｇ的一个［ａ，ｂ］－因子，若对任意的υ∈Ｖ（Ｇ）有ａ≤ｄＦ（υ）≤ｂ，图Ｇ称为是［ａ，ｂ］－覆盖图，若对Ｇ的每一条边，存在Ｇ的一个［ａ，ｂ］－因子包含它。本文给出了一个图的［ａ，ｂ］－覆盖图的关于领域并的充分条件，得到了下列结果：设１≤ａ〈ｂ是整数，Ｇ是一个阶为ｎ的图，最小度δ（Ｇ）≥α且ｎ≥２（ａ＋ｂ）（ａ＋ｂ－１）１／ｂ如     

一类平面系统具Dulac中心的系数条件

一类平面系统具Ｄｕｌａｃ中心的系数条件温九（济南大学）Ｈ．Ｄｕｌａｃ在［１］中指出，对于系统其中，Ｐ＿ｎ＝ａ＿（ｎ０）ｘ￣ｎ＋ａ＿（ｎ－１，１）ｘ￣（ｎ－１）ｙ＋…＋ａ＿（０ｎ）ｙ￣ｎ，Ｑ＿ｎ＝ｂ＿（ｎ０）ｘ￣ｎ＋ｂ＿（ｎ－１，１）ｘ￣（ｎ－１）ｙ＋...     

Ferron逐时络合比色法测定铁铝共聚物的形态

Ｆｅｒｒｏｎ逐时络合比色法将湿法制取的Ｆｅ（Ⅲ）＋Ａｌ（Ⅲ）共聚物区分为三种不同的形态，即［ＦｅⅢ、Ａｌ（Ⅲ）］（ａ），［Ｆｅ（Ⅲ）＋Ａｌ（Ⅲ）］（ｂ）和［Ｆｅ（Ⅲ）＋Ａｌ（Ⅲ）］（ｃ）。（＋）表示共聚）。（ａ）为铁、铝的单核化合物，瞬时即可与Ｆｅｒｒｏｎ试剂反应完毕；（ｂ）为铁，铝的低聚物，与Ｆｅｒｒｏｎ试剂逐时进行反应；（ｃ）为铁、铝的高聚物，基本上不与Ｆｅｒｒｏｎ试剂反应。实验结果表明，湿法制备的＊［Ｆｅ（Ⅲ）＋Ａｌ（Ⅲ）］共聚物的水解－聚合较单Ｆｅ（Ⅲ）和Ａｌ（Ⅲ）的水解－聚合过程快得多，经过４天的熟化后，（ｂ）形态逐渐转化为（ｃ），（ｂ）消失，（ａ）形态的含量略有减少。     

丢番图方程x~2＋q~m＝p~n

丢番图方程ｘ￣２＋ｑ￣ｍ＝ｐ￣ｎＮ．Ｔｅｒａｌ著及万会编译１９５６年Ｓｉｅｒｐｉｎｓｋｉ［１］证明了方程３ｘ＋４ｙ＝５ｚ只有正整数解（ｘ，ｙ，ｚ）＝（２，２，２），Ｊｅｓｍａｎｏｗｉｃｚ［２］猜想：如果ａ，ｂ，ｃ满足ａ２＋ｂ２＝ｃ２则方程ａｘ＋ｂｙ＝...     

一个不等式的推广

本文对１／ａ＾Ｆ（ｂ＾ｍ＋ｃ＾ｍ）＋１／ｂ＾Ｆ（ｃ＾ｍ＋ａ＾ｍ）１／ｃ＾Ｆ（ａ＾ｍ＋ｂ＾ｍ）≥３／２做了元数和指数推广,获得了一些新的不等式。     

具有三个CM公共值集的亚纯函数

建立了具有三个特定类型的ＣＭ公共值集的两个亚纯函数之间的关系,得到如下结果：设判别有限复数ａ１,ａ２,ｂ１,ｂ２满足ａ１＋ａ２＝ｂ１＋ｂ２,ａ１ａ２≠ｂ１ｂ２．如非常数亚纯函数ｆ与ｇ以｛ａ１,ａ２｝,｛ｂ１,ｂ２｝,及｛∞｝为ＣＭ公共值集,则ｆ与ｇ必满足如下关系之一：（ｉ）ｆ≡ｇ;（ｉ）ｆ＋ｇ≡ｃ;（ｉｉ）ｆ－ｃ２ｇ－ｃ２≡±ａ１－ａ２２２;（ｉｖ）（ｆ－ａｊ）（ｇ－ａｋ）≡（－１）ｊ＋ｋ（ａ１－ａ２）２（ｊ,ｋ＝１,２）;（ｖ）（ｆ－ｂｊ）（ｇ－ｂｋ）≡（－１）ｊ＋ｋ（ｂ１－ｂ２）２（ｊ,ｋ＝１,２）．其中ｃ＝ａ１＋ａ２．     

正常麻醉犬动脉血和脑脊液酸碱电解质关系的初步分析

３０只健康麻醉犬动脉血和脑脊液（ＣＳＦ）酸碱变量及主要电解质检测结果分析发现：ＣＳＦｐＨ、［Ｋ~＋］＜ｐＨａ和［Ｋ~＋］_ａ，相互之间相关显著，其回归方程分别为ＣＳＦｐＨ＝０．４７７×ｐＨａ＋３．７８，ＣＳＦ［Ｋ~＋］＝０．４１８×［Ｋ~＋］_ａ＋１．１２。ＣＳＦＰＣＯ２、［Ｃｌ~－］、［乳酸］［Ｌａｃｔ］＞ＰａＣＯ２、［Ｃｌ－］_ａ和［Ｌａｃｔ］_ａ，相互之间相关显著。其回归方程分别为ＣＳＦＰＣＯ２＝０．５６４×ＰａＣＯ２＋３．５３２５，ＣＳＦ［Ｃｌ~－］＝０．５×［Ｃｌ~－］_ａ＋７６．７，ＣＳＦ［Ｌａｃｔ］＋０．９５×［Ｌａｃｔ］_ａ＋１．０。ＣＳＦ［ＨＣＯ_３~－］与ＣＳＦＰＣＯ２相关显著，回归方程为ＣＳＦ［ＨＣＯ_３~－］＝１．８９８×ＣＳＦＰＣＯ２＋１０．６。     

不定方程ax＋by＋cz=n再研究

给出了三元线性型ａｘ＋ｂｙ＝ＣＺ的最大不不可表出数等于ａｂ／（ａ，ｂ）＋（ａ，ｂ）ｃ－ａ－ｂ－ｃ的充要条件。     

一类三阶双滞后差分微分方程全时滞稳定的代数判据

对三阶双滞后差分微分方程ｘ…（ｔ） ＋ ａ０ ｘ＋ ａ１ ｘ－ （ｔ） ＋ ａ２ ｘ（ｔ） ＋ ｂ０ ｘ（ｔ－ τ１） ＋ ｂ１ ｘ－ （ｔ－ τ１）＋ ｂ２ ｘ（ｔ－ τ１） ＋ ｃ０ ｘ（ｔ－ τ２） ＋ ｃ１ ｘ－ （ｔ－ τ２） ＋ ｃ２ ｘ（ｔ－ τ２） ＝ ０的全时滞稳定性进行了研究,利用其特征方程,Ｈｕｒｗｉｔｚ 定理及函数的极值理论等方法得到了当ｂ１ｂ０＝ ｃ１ｃ０时此方程全时滞稳定的充分必要条件。     

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.     

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.     

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-