K_(1,4)-自由图的模k泛圈(英文)

对于任意自然数k ,如果图G包含模k长的每一个圈 ,那末图G被称为模k泛圈图 .本文证明了连通K1,4 -自由图G是k =3的泛圈图 ,这一结果断定了Thomason猜想在连通图中的正确性 .     

K1,4自由模k的泛圈图的注记

给出关于K1,4自由模k的泛圈图的注记,证明了当条件弱化时已有结论的正确性,得到更一般意义下的模k的泛圈图,即每个2-连通的K1,4自由图G中,如果存在4个度都不小于k+1的点,其中一点u的邻域N(u)为3个不相交子集的并,其余3个点恰好分别属于以上3个子集,那么可得该图G是模k的泛圈图(k≥3).     

爪心独立图的模k泛圈性

证明了2-连通的爪心独立图G，如果对任意的非爪心点v，有d（v）≥k＋l，对任意的爪心点u，存在v∈N（u），使得d（u）≥忌＋2，那么G是模k点泛圈的．     

一类图的几乎唯一泛圈性

设G是阶为n的简单Hamilton图，若存在m（3m〈n）使对每个l∈{3，4，…，n}-{m}，G恰有一个长为l的圈且不含长为m的圈，则称G是几乎唯一泛圈图．用Гk^（3）表示具有n＋k条边且满足一定条件的简单外可平面的日图的集合，讨论了Гk^（3）中图的几乎唯一泛圈性．     

(s,k)-连通图

图G为（s,k）-连通图,如果G中任意s个顶点的导出子图是k-连通的。证明了：如果s-k≤｜G｜-1/2,则（s,k）-连通图G是完全圈可扩的。由此推出,若图G的连通度κ（G）≥｜G｜＋1/2,则G是完全圈可扩的。     

k圈轮的Cordial性

以Cn 表示n圈 ,设Gk=Cn1∪…∪Cnk,顶点s V(Gk) ,称GkV{s}是k圈轮 .本文给出k圈轮是Cordial图的充要条件为 ∑ki=1ni 3(mod4 ) .     

Cartesian积图的边泛圈性

网络中子图的可嵌入性是度量网络优劣的一个重要性能。圈作为网络拓扑中一类重要的子图,其可嵌入性可以通过泛圈性来度量。Cartesian积图是互联网络拓扑结构中一类非常重要的图类。设G是长为k1和k2的圈的Cartesian积图。利用Cartesian积图的顶点和边的传递性,证明了当k1≥3,k2≥3,G是边偶泛圈的;当k1,k2均为奇数时,G是（k1＋k22）-边泛圈的。     

(4)-泛圈图的一个必要条件

(k)-泛圈图是指对每一个r(3≤r≤n),阶为n的图G恰好有k个长为r的圈.本文主要探讨只含有2对缠绕弦的(4)-泛圈图中包含2对缠绕弦的生成子图结构以及其阶.     

奇异k-紧整数无限族

设n，s1，s2是3个正整数，使得s1〈s2〈n，gcd（n，s1，s2）=1．双环网G（n；s1，s2）是个有向图，其结点集为V={0，1，2，…，n-1}，其弧集为A={i→i＋s1 （mod n），i→i＋s2（mod n）｜i∈V}，s1和s2称为步长．设d（n；s1，s2）为双环网G（n；s1，s2）的直径．令 d（n）=min{d（n；s1，s2）｜s1〈s2〈n}，d1（n）=min{d（n；1，s）｜1〈s〈n）． 已知d1（n）≥d（n）≥｜√3n｜-2=lb（n）．若d（n；s1，s2）=d（n）=lb（n）＋k（k≥0），则称G（n：s1，s2）是个k-紧优的双环网．虽然等式d1（n）=d（n）对于无限多个整数n成立，但也存在无限多个整数n使得d1（n）〉d（n），这样的n称为奇异整数．若d1（n）〉d（n）=lb（n）十k，k≥0，则这样的n称为奇异k-紧整数． 本文给出构造奇异k-紧整数无限族的方法，并对于k=1,2．…．20，构造出这样的无限族．     

关于有向双环网络L-形瓦的四个参数

对于有向双环网络G（n；s1，s2），四个参数k1，k2，j1,j2定义如下： （1）k1=min（k1ks2=js1（mod n）且k≥j≥0,k=1,2,…,n-1）； （2）j1=min（j1k1s2=js1（mod n）,j≥0）; （3） j2=min（j1 ks2=js1（mod n）且j〉k≥0,j=1,2,…,n=1）; （4）k2=min（k1 ks2=j2s1（mod n）,k≥0） 则k1，k2，j1,j2恰好是由G（n；s1，s2）决定的L-形瓦的四个参数，并且（j2-j1，k1-k2）是同余方程xs1＋ys2=0（mod n）的最小正解．     

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