线图的邻域完整度的界

利用图的边邻域完整度，讨论了其线图的邻域完整度的界，得到了以下主要结果：①设口(G)为图G的边独立数，则VNI(L(G))≤β(G)；②对于任意连通图G，有VNI(L(G))≥ENI(G)-1，且此下界可达到。     

折叠超立方体的边邻域连通度

折叠超立方体是最受关注的网络模型之一.设e是图G的一条边, 如果从图G中删掉以e为中心的双星子图,则称e"倒戈".设S为一个边集, 如果S中的边全部倒戈, 若剩下的子图或者不连通, 或者是一个孤立点, 或者是空集, 则称S为G的割边策略.G的最小割边策略所含的边数为边邻域连通度.该文主要证明了折叠超立方体FQn的边邻域连通度为n.     

图的几种N(p,q)标号问题

本文给出了图的两个关于点的邻域限制标号的定义:非完全邻域限制标号SN(p,q)与完全邻域限制标号TN(p,q)。SN(p,q)标号是仅对图的大度点的邻域做限制的正常标号;TN(p,q)标号是对图的所有点的邻域做限制的正常标号。图G的非完全邻域限制标号数与完全邻域限制标号数分别记为SL_p,q(G),TL_p,q(G)。本文主要给出了某些图G的SL_p,q(G),TL_p,q(G)的界。     

泡序图的广义4-连通度

S?V(G)是G的一个顶点集且|S|≥k,其中2≤k≤n.连接S的树T叫作斯坦纳树.两棵斯坦纳树T₁和T₂称为内部不交的,当且仅当它们满足E(T₁)∩E(T₂)=?和V(T₁)∩V(T₂)=S.令κ_G(S)是G内部不交的斯坦纳树的最大数目,κ_k(G)=min{κ_G(S)∶S?V(G),|S|=k}定义为G的广义k-连通度.很显然,当|S|=2时,广义2-连通度κ₂(G)就是经典连通度κ(G).因此广义连通度是经典连通度的推广.主要讨论泡序图B_n的广义4-连通度κ₄(B_n).得到的结论是当n≥3时,κ₄(B_n)=n-2.     

图与补图孤立断裂度的关系

连通图G的孤立断裂度isc(G)=max{i(G-S)-｜ S ｜:S∈C(G)},其中i(G-S)是G-S中的孤立点数,C(G)是G的点割集.文章研究了图与补图孤立断裂度的关系.     

线图的限制性邻域连通度

在间谍工作中,限制性边邻域连通度和限制性邻域连通度比一般连通度和边连通度更加稳定可靠。文中提出了两个新概念:限制性邻域连通度和限制性边邻域连通度。证明了如果图G的线图L(G)是κ’NC图,那么κRNC(L(G))=λRNC(G)当且仅当G不是super-λRNC。并且证明了如果G是λpN C+1,q+1(G)连通图,那么L(G)是κpN,Cq连通的,并且κpN,Cq(L(G))=λpN C+1,q+1(G)。     

图的代数连通度及其点连通度

G是一个简单图.a(G),k(G)分别为G的代数连通度和点连通度,该文刻画了满足a(G)=k(G)的图.G=(V,E)是一个n阶简单图,点连通度为k(G)≤[n/2].H是G的任意最小点割集,则a(G)=k(G)当且仅当对任意u∈H和v∈V\H,有uv∈E.     

边染色图中的2-因子

令G是含n个点的边染色图,对G中任意顶点x,定义其色邻域CN(x)为集合{c(xy)|xy∈E(G),y∈V(G)}.如果G中任意相邻的两条边都染有不同的颜色,就称G是正常染色的.证明了如果边染色图G满足对V(G)中任意两点u,v有|CN(u)∪CN(v)|≥4n/3+8,则图G含有一个正常染色2-因子.     

一些笛卡尔乘积图的限制连通度

子集S(∩)V(G)称为限制割,若任何点v∈V(G)的邻点集NG(v)都不是S的子集且G-S不连通.若G中存在限制割,则定义限制连通度κ1(G)=min{| S|S是G的一个限制割}.考虑了笛卡尔乘积图,证明了设G=G1×G2×…×Gn,若Gi是满足某些给定条件的ki连通ki正则且围长至少为5的图,其中i=1,2,…,n,则κ1(G)=2n∑i=1ki-2.     

λ'-最优无三角图的最小边度充分条件

设S是连通图G的一个边割。若G-S不包含孤立点,则称S是G的一个限制边割。图G的最小限制边割的边数称为G的限制边连通度,记为λ'(G).如果图G的限制边连通度等于其最小度,则称图G是最优限制边连通的,简称λ'-最优的。设G是一个n阶的连通无三角图,且最小度δ(G)≥2.文章证明了,若最小边度ξ(G)≥(n/2-2 )(1+1/δ(G)-1),则G是λ'-最优的。并由此推出,若连通无三角图G的最小度δ(G)≥n/4+1,则G是λ'-最优的。最后给出例子说明这些结果给出的边界都是紧的。     

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.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

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.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

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-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that