采用折叠-展开技术的一种并行排序算法

给出ｎ×ｎ网孔环接式阵列处理机上的一种并行排序算法,它将ｎ×ｎ阵列上的数据折叠成ｎ×ｎ／ｋ子阵列,排序后再展开到整个ｎ×ｎ阵列上,实现ｎ×ｎ项数据的行主序排序,其平均时间复杂度为（２＋１／ｋ）ｎ＋ｏ（ｎ）．若采用ｎ×ｎ／ｋ阵列模型,且各处理器初始、结束状态允许有ｋ项数据时,该算法的平均时间复杂度只有（１＋２／ｋ）ｎ＋ｏ（ｎ）．     

工序问题的动态规划算法

提出了一个求解工序问题的动态规划算法，该算法排序含ｎ个工件集合的期望时间为Ｏ（ｎ）．     

在SIMD—EREW计算模型上的并行排序算法

本文提出一种在ＳＩＭＤ－ＥＲＥＷ计算模型上实现的并行排序算法。算法采用基数交换排序方法，在处理过程中无存贮访问冲突。对长度为ｎ的序列，算法使用不超过ｎ／２个处理单元，时间复杂度为Ｏ（ｕ．ｌｏｇ２ｎ），其中ｕ为不超过处理器字长的常数。该算法适合于具有较多重复元素的序列排序。     

在SIMD－EREW计算模型上的并行排序算法

本文提出一种在ＳＩＭＤ－ＥＲＥＷ计算模型上实现的并行排序算法．算法采用基数交换排序方法，在处理过程中无存贮访问冲突．对长度为ｎ的序列，算法使用不超过个处理单元，时间复杂度为Ｏ（ｕ．ｌｏｇ２ｎ），其中ｕ为不超过处理器字长的常数．该算法适合于具有较多重复元素的序列排序．     

同类处理机排序问题Q2∥Cmax的一个算法

本文对ｎ个任务，２台同类处理机的排序问题Ｑ２∥Ｃｍａｘ进行讨论，提出一个算法，用该算法得到的排序表长的界是２ｂ＋１／２ｂＭ，算法的复杂性为Ｏ（ｎｌｏｇｎ）。     

一类复合并行机排序问题计算复杂性研究

研究确定性排序理论的一个新模型：考虑４台机器的集合Ｍ＝（Ｍ１，Ｍ２，Ｍ３，Ｍ４）和ｎ个零件的集合Ｊ＝（ｊ１，ｊ２，…，ｊｎ），每个零件同时被２ｉ＝（ｉ＝０，１，２）台机器同时加工。证明了在不允许间断，优化指标为作业排序长度的条件下，该问题是强ＮＰ－完全问题，没有多项式时间算法。     

串并联可变电阻网络的几何学特性

由可变线性电阻、电压源和电流构成的串并联网络运行运行状态的值域可以表示为代维南或诺顿半平面上的一个凸多边形。对于含有ｎ个元件的 些多边形最多有２Ｋ个顶点，而且可以在Ｏ时间内完成计算。这些平面嵌在实投影平面之中，以描述具有潜在无穷大的代维南遇阻或诺顿电导的电路，对于具有单生结构的电路，一旦接地支路全部删除，所有相关接地的节点的特征我边形可用一个复杂性为Ｏ的算法同时求出。     

基于网络有效阻抗的社区发现算法

社区发现在很多领域都有非常重要的应用。受经典电路网络中的阻抗原理启发,提出了一个新颖的社区发现算法。该算法通过迭代调用基于网络总阻抗的割边选择模型来实现社区发现的目标。在每一次迭代过程中,割边选择模型采用启发式策略割除恰当数量的边,使得割边后的网络有效阻抗最大化。理论分析表明该算法具有较低的算法复杂度。利用仿真数据和真实数据对算法进行测试,实验结果表明算法性能良好。     

Polya—Szego不等式的推广

本文推广了Ｐｏｌｙａ—Ｓｚｅｇｏ不等式，证明了定理１：设ａ＿１，ａ＿２，…，ａ＿ｎ为一个圆外切ｎ边形的边长，Ａ表示它的面积，则，等式对正ｎ边形成立。其中定理２：设ａ＿１，ａ＿２，…，ａ＿ｎ为一个圆内接ｎ连形的边长，Ａ表示它的面积，则Ａ≤等式对正ｎ边形成。其中。     

一个实用的检验Kn(3,p)的算法

设Ｋｎ是ｎ个顶点的完全图，若对Ｋｎ的每条边着以红色或蓝色，并且图中既不包含红色团Ｋ３也不包含蓝色团Ｋｐ，这样就得到一个二色边图Ｋｎ，同时将这种染色所得的图记为Ｋｎ（３，ｐ），把使Ｋｎ（３，ｐ）成立的最大值记为Ｒ（３，ｐ），Ｒ（３，ｐ）＝ｒ（３，ｐ）－１，ｒ（３，ｐ）是Ｒａｍｓｅｙ数，本给出一个实用的算法，可以对给定连通图检验Ｋｎ（３，ｐ）是否成立 。     

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     

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     

Journal of Donghua University ( English Edition) Contents of Volume 31

正~~