基于非简单的失效独立的路径保护圆的抗毁性光纤网络优化设计(英文)

提出了一个新的基于简单及非简单的失效独立的路径保护圆(FIPP p-cycles)的抗毁性光纤网络保护方法.从带宽利用率的角度比较研究了菲简单及简单FIPP p-cycles.提出的新设计方法基于一种大规模优化工具,即列生成技术.与传统设计方法相比,新提出的基于列生成的方法在优化过程中动态生成候选的FIPP P-cycles,不要求预先枚举出任何候选者.实验结果显示与基于简单FIPP p-cycles抗毁性全光纤网络设计相比,基于非简单的FIPP p-cycles 设计可非常有效的利用带宽.     

陈景润三定理的简单证明

本文给出了陈景润关于等幂和三定理的简单证明.利用差分的技巧,我们给出了陈景润第一定理的简单证明.利用一对共轭式,我们给出等幂和的递推公式,推广了陈景润第二定理.利用该递推公式,给出陈景润第三定理的简单的证明.     

知识空间与简单拟阵的关系

知识空间理论是数学心理学的重要组成部分.简单拟阵是组合优化中的一个重要分支,几何格是拟阵论中的一个重要概念.知识空间理论与简单拟阵之间存在着紧密的联系.首先基于技能映射中技能与问题之间的联系确定知识基,通过知识基来生成简单拟阵的一个闭集族.其次定义了问题与技能的伽罗瓦联络,讨论知识空间的伽罗瓦格与简单拟阵闭集族的几何格...     

简单安全的用户名和密码存储方法及应用

介绍简单安全的用户名和密码存储的设计思想和实现方法.提出不需要借助第三方软件来建立数据库,还有简述密码进行简单加密和解密的算法.运用Visual Basic6.0编译环境编程可以实现对用户名和密码进行简单安全存储.掌握这种存储方法,可以开发需要用户登录的软件.     

锌碘盐中锌含量的检验

介绍了锌碘食盐中锌的定性鉴定和定量测定的简单方法.这些方法简单、快速,其测定结果具有一定的参考意义.     

利用残数求级数和

本文根据残数理论,给出两类收敛级数求和的一种简单方法,并给出了该方法的理论证明.最后附有典型例题.方法新颖,运算简单.     

从物理学史看简单性原则的发展

简单性原则包括统一性、数学美和经济性,是在科学研究活动中逐渐形成的一条方法论原则,曾作为优选理论的标准在人类认识世界的过程中起过重要作用.在系统科学和复杂性科学蓬勃发展的今天,本文追溯简单性原则的历史线索,对简单性原则的依据做了较为深入的理解,探讨简单性原则的价值,并且相信简单性原则将来会继续发挥重要作用.     

计算系统可靠性的一种改进方法

本文简单叙述了 J.A.Abraham 和 W.G.Schneeweiss计算系统不相交项的算法,提出了一种新的改进方法.这种方法仅运用布尔代数,避免了三进制运算,主要优点是简单、快速.     

一种简单的CMOS过温保护电路

目的 对已有的过温保护电路进行分析,提出一种结构简单,功耗较低的过温保护电路.方法 引用峰值电流源作为启动电路,并尝试避免使用传统的迟滞比较器,采用了简单的结构实现比较功能.结果 实现了一种简单的过温保护电路的设计.结论 Hspice仿真结果 表明该电路可以实现过温保护.     

基于ArchC进行嵌人式Microcontroller设计研究

介绍了一种实用的以SystemC为基础的体系结构描述语言(ADL)一Archc,首先简单对ArchC软件工具包进行了说明.接着重点介绍了以ArchC为工具进行Microcontroller设计的原理和简单流程,并说明了其关键技术,最后作了一个简单的总结.     

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

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