利用FIFO器件的多机系统

本文介绍由ＦＩＦＯ器件所组成的多机系统，它能够较好地解决存储器竞争问题，改进了系统的实时功能。     

STC-Ada多机系统的互连结构及共存管理的实现

本文介绍了一个共享存储型多机系统——STC—Ada多机系统。研制本系统的目的,旨在支持Ada语言多任务机制的并行执行。文中概述了STC—Ada多机系统的组成及其互连结构,重点论述了STC—Ada多机系统的交叉开关矩阵和共存管理的实现。     

基于群机系统的时钟同步模型

叙述了并行分布式系统中时钟同步的重要性，并介绍了完成时钟同步的三种主要方法，抽象出群机系统模型，在此基础上提出了ｌｉｎｕｘ系统环境下的群机系统的时钟同步模型。     

多机实时仿真系统软件的研究

本文建立了在多机系统中实现分机自举的方法，并针对实时仿真需要极高的计算速度，对软件的结构，算法，编程语言，定总计算和结果的显示分别进行了研究，最后以船舶柴油机动力装置的实时仿真为例说明了该仿真系统的可用性。     

基于群机系统的时钟同步模型

叙述了并行分布式系统中时钟同步的重要性，并介绍了完成时钟同步的三种主要方法.抽象出群机系统模型.在此基础上提出了linux系统环境下的群机系统的时钟同步模型.     

一种新型多功能数字电子实验系统

设计了一个主从式多机系统，该系统可进行数字电子实验，系统运行时可在主机屏幕上监视各实验机的状况、“重看”实验过程、自动实时判断实验方法的对错、在分机上进行逻辑电路仿真等。     

群机系统环境下的时钟同步技术

提出了群机系统时钟同步的体系结构 ,介给了群机系统环境下时钟同步的实现技术以及时钟同步系统的主要数据结构、时钟同步进程和服务进程的主要程序     

人—机系统的效率分析与系统协调原理

本文提出,在人一机系统管理中,必须运用系统协调原理,对系统效率进行定量分析,识别出该系统中操作人员与机器设备间的适应水平与状态,这样才能有针对性地采取管理对策,使人、机处于最佳匹配状态,从而在最大限度利用资源的水平下提高人一机系统效率.     

上臂假肢的智能控制

上臂假肢系统是一个复杂的人一机系统。本文讨论了上臂假肢及其控制的特点。提出了以伺服级、协调级、组织级构成的三级上臂假肢智能控制系统。仿真实验研究表明，该系统能实现预期的功能，减轻了截肢者的智力负担。     

人—机系统建模与系统分析

以人的最优控制模型为基础,以某高炮人-机系统为对象,建立该系统在不同工作状态下的数学模型,利用模型预测的统计分析方法。对系统的动态性能进行分析     

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~~