超立方体上的奇异值分解

本给出了在超立方体连接的单指令流多数据流（ＳＩＭＤ）机器上进行矩阵奇异值分解（ＳＶＤ）的算法，对ｍ×ｎ／２个处理单元的ＳＩＭＤ机器上进行ＳＶＤ，时间复杂度为Ｏ（ｌｏｇｍ．ｎ．ｌｏｇｎ）。本还给出了大型矩阵在固定大小的ＳＩＭＤ机器上求解ＳＶＤ的行压缩与列分割方法。     

等离子化学气相沉积硬膜技术研究

用等离子体化学气相沉积（ＰＣＶＤ）技术制备了ＴｉＮ、ＴｉＣ、Ｔｉ（ＣＮ）和（ＴｉＳｉ）Ｎ膜及其组合的多层膜。ＰＣＶＤ具有很好的覆盖性，ＰＣＶＤ－ＴｉＮ具有很好的耐磨、蚀性，膜与基体结合良好，因而用ＰＣＶＤ法在高速钢刀具、模具及轴承上沉积ＴｉＮ可大大提高其使用寿命。ＰＣＶＤ－ＴｉＮ和Ｔｉ（ＣＮ）膜无明显柱状晶，其显微硬度高于ＴｉＮ亦可用于高速钢刀具、模具上提高其使用寿命。ＰＣＶＤ－（ＴｉＳｉ）Ｎ，晶     

海外角

袖珍ＤＶＤ导航系统 日本三洋公司最新研制成袖珍ＤＶＤ导航系统。这种取名为“大猩猩ＮＶ—ＤＶＤ３”的导航有一个１７．８厘米的宽幅液晶显示屏，它可以装在汽车上用作公路导航仪，也可以看光碟和电视。该袖珍ＤＶＤ导航系统７月１日起在日本国内市场出售，售价为每个２４．５万日元（约合１９９０美元）。 电池薄如纸 以色列的Ｐｏｗｅｒ Ｐａｐｅｒ公司推出了一种像纸一样薄的低能量电池。这种电池是９项专利相融合的产物，它利用像墨水一样的电解质来携带电荷，是一种可弯曲的环保电池。 这种电池的能量与它的表面积成正比。一块６．…     

圆盘上的BMO_p（D）空间与Bloch空间

在单位圆盘Ｄ上引入了一类函数空间ＢＭＯｐ（Ｄ）和ＶＭＯｐ（Ｄ）（１≤ｐ＜＋∞），讨论了它们与ＺｈｕＫｅｈｅ引入并讨论的函数空间ＢＭＯａ（Ｄ）和ＶＭＯａ（Ｄ）之间的关系；证明了全纯的ＢＭＯｐ（Ｄ）函数为Ｂｌｏｃｈ．函数，全纯的ＶＭＯｐ（Ｄ）函数为小Ｂｌｏｃｈ函数．即ＢＭＯｐ（Ｄ）Ｈ（Ｄ）＝，ＶＭＯｐ（Ｄ）Ｈ（Ｄ）＝。     

圆盘上的BMOp（D）空间与Bloch空间

在单位圆盘Ｄ上引入了一类函数空间ＢＭＯｐ（Ｄ）和ＶＭＯｐ（Ｄ）（１≤ｐ＜＋∞），讨论了它与ＺｈｕＫｅｈｅ引入并讨论的函数空间ＢＭＯａ（Ｄ）和ＶＭＯａ（Ｄ）之间的关系；证明了全纯的ＢＭＯｐ（Ｄ）函数为Ｂｌｏｃｈ函数，全纯的ＶＭＯｐ（Ｄ）函数为小Ｂｌｏｃｈ函数。     

国内DVD行业现状与发展趋势

国内ＤＶＤ行业现状与发展趋势□陆雪萍一、国内ＤＶＤ行业的现状ＤＶＤ热正在世界范围蓬勃兴起，我国政府也十分关注这一领域的技术开发并将ＤＶＤ开发纳入“九五”科技攻关计划。国内一些企业的科研人员也已开始了ＤＶＤ技术的跟踪与产品的开发工作，看好ＤＶＤ，不仅因...     

拟共形映射正规族

关于平面区域ＤＣ上的Ｋ－拟共形映射族ｋ（Ｄ），ＬｅｈｔｏａｎｄＶｉｒｔａｎｅｎ已证明［１］：若（Ｄ）在Ｄ上等度连续，则Ｋ（Ｄ）是正规族。本文给出了Ｋ（Ｄ）是正规族的另一个充分条件：Ｋ（Ｄ）在Ｄ上局部一致有界。     

DVB数字视频广播：第三个黄金时代的电视

ＤＶＢ数字视频广播———第三个黄金时代的电视□李嘉陵ＤｉｇｉｔａｌＶｉｄｅｏＢｒｏａｄｃａｓｔｉｎｇ（简称ＤＶＢ），是欧洲有１７０个组织参加的一个项目，包括了卫星、电缆电视和地面广播的普通电视和高清晰度电视的广播与传输。也就是说，ＤＶＢ实际上包括了所...     

全数字化多媒体技术的代表

本文介绍了数字视频交互（ＤＶＤ）技术的发展概况，详细论述了ＤＶＩ的硬件结构和组成原理，并论述了ＤＶＩ系统软件平台的构成以及它的核心软件ＡＶＫ的组成和原理。     

群链的Wigner—Racah代数：Ⅳ.约化V系数与3—jГP符号及其…

讨论了标题群链中Ｄ∞包含Ｄｎ的约化Ｖ系数与３－ГР符号，整条群链的约化Ｖ系数与３－ｊГР符号，设计了相应的计算机程序并在微机上实现。     

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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