完全图K_5中的生成树的构造与计数

给出了生成子图和生成子图的计数定理。证明了生成子图的构造定理。提出了任意完全图Kp的生成树的计数方法和构造方法。给出了生成子树的计数公式。利用生成子圈的计数方法,寻找生成子图的生成树,证明了生成树的构造定理和计数定理。同时介绍了完全图K5的含圈生成子图及不含圈的生成树的计数和构造。生成树的计算公式过于庞大,且仅适用于完全图的Kp。平图例子验证了构造定理和计数定理的实用性和有效性,是构造一个完全图的生成树的简单易行的方法。     

五面体平图中的生成树的构造与计数

首先给出了生成子图的定义,生成子图与生成树、含圈的生成子图的关系S(G)=C(G)+T(G);其次对于任意连通图,以p=4,q=6的完全图K4为例给出了生成子图个数的计算公式,同样以p=4,q=6完全图K4为例给出了生成树的构造定理和计数定理,提出了图S(G)生成树的计数方法和构造方法;最后,介绍了五面体平图生成子图个数的计算和各生成子图的构造,并验证了所给公式的正确性,从而解决了任意平图G(p,q)生成树的构造问题。     

正则q 树根图的双概率可靠性探究

首先研究得到了双变量色多项式的一般性的减边公式.接着对根图顶点进行了期望值研究,得出其减边公式,并由此得到一些特殊根图的期望值计算公式.最后讨论了正则q-树根图和正则q-树整子根图的期望值计算公式.     

一种基于Hu不变矩的匹配演化算法

提出了一种基于Hu不变矩的匹配演化算法.该算法利用一种新的演化搜索策略取代传统的遍历搜索策略,将Hu不变矩特征融入演化适应函数.首先通过演化策略,产生多个搜索子图;然后计算待识别搜索子图与模板图像的不变矩特征值,用欧氏距离衡量两者的相似度;最后通过演化策略产生新的搜索子图,用该搜索子图淘汰种群中适应函数值最大的搜索子图.实验结果表明该算法具有较高的效率和鲁棒性.     

电声门图采样场理论,实验和应用

本文建立了完整的电声门图采样场理论。分析了喉部容积导体电特性变化因素;介绍了推导出的场扰动理论公式、修正Geselowitze-Lehr公式、灵敏度分布公式、调制度预测公式和喉部组织中电场与音频声场互作用公式;建立了电声门图数学模型;提出了横向和纵向电声门图概念及其测量方法,并研究了横向电声门图与声带振动的关系;澄清了微音器效应产生机理并提出了抑制方法。理论研究结果由模型和人体实验结果所证实。基于上述理论研制成功的多功能声门图仪已被用于喉科临床和嗓音学研究。     

一种改进的Chan-Mai图公式

本文指出了原Chan-Mai图增益公式有错误,提出了分离图中分离块的概念,从而得出了新的Chan-Mai图公式。     

图K_n~k和C_n~t的理想子图的计数

本文给出图K_n~t和C_n~t的具有K个分支的所有理想子图的计数公式N(K_n~t,K)及N(C_n~t,K)。     

关于单图所含子图C_3、C_4、C_5的计数定理

本文借助矩阵的两类新运算给出了单图所含子图C_2、C_4、C_5的计数公式.     

某些伪类环图的生成树数

连通图的生成树是指该图的极小连通生成子图.通过Cayley公式、递推关系式及伪类环图与伪类环图生成树数之间的关系式给出伪类环图-Sn,-An的生成树数.     

n个点的单图所含子图C_6的计数定理

本文在文献[1]的基础上,借助矩阵的四种新运算,给出了n个点的单图所含子图C_6的计数公式.     

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.     

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.     

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     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with