并行口ECP模式的研究

介绍了并行口常见的几种工作模式和ECP模式的特点以及并行口ECP协议的输入输出时序特性,说明了并行口ECP模式所使用的寄存器及端口地址;分析了FIFO寄存器的使用方法;给出在并行口ECP模式下进行双向数据传输的一个电路实例和主要的通信流程.     

并行口在通信中的应用

简要介绍了计算机并行口的工作模式分类、用于打印时的工作原理及在不同工作模式下并行口的操作区别,最后,举例说明了在标准模式下进行双向数据采集的设计思路。     

并行口EPP模式的应用

简要介绍了并行口常见的几种工作模式和并行口EPP协议的输入输出时序特性，说明了并行口EPP模式所使用的寄存器及端口地址；分析了并行口EPP模式的应用场合；给出在并行口EPP模式下进行高速双向数据传输的一个电路实例和主要的通信程序片断。     

微机并行口5种工作模式的探讨

论述了微机并行口的5种工作模式,给出了不同工作模式下的信号定义,以及信号的时序关系,探讨了各种工作模式的特点及使用场合,对开发基于微机并行口的外设有很大的借鉴作用.     

并行口在EPP模式下的应用

给出了并行口的EPP协议，以及在EPP模式下进行数据采集、A／D转换与并行口扩充的实用实例。     

并口EPP模式下的双机高速互连

分析了利用并行口进行双机互连的传统方法的缺点，提出了利用增强并行口进行双机互连的方法；介绍了并行口EPP模式的协议，给出在并口EPP模式下进行双机高速互连的电缆连接方法和软件编程的要点；将本方法和其它各种双机互连方法进行了对比并给出结论．     

基于并行口PS／2模式实现微机与单片机通信

论述了微机并行口PS／2模式的工作原理,阐述了软件握手关系,提出了一种高效的增强软件握手关系的设想及其实现方法,实现了单片机与微机并行口PS／2模式的通信,数据传送速率大约是串行通信(115．2kbit／s)速率的15倍,该设计方法对微机与近距离中速外围设备的通信有一定的参考价值。     

利用并行口控制LCD显示模块的研究

介绍了并行口SPP模式的特点和MGLS12864液晶显示模块的主要功能，提供一种利用计算机并行口的SPP模式与显示模块MGLS12864连接，用软件代替硬件来实现对显示模块直接控制的方法，并给出控制显示模块MGLS12864的过程和两个实用子程序。     

利用并行口监测系统状态

介绍了并行口SPP模式的特点和显示模块FC40X2EA的主要功能，提供一种利用计算机并行口的SPP模式与显示模块FC40X2EA连接，用软件代替硬件来完成对系统状态进行监测的方法，给出控制显示模块FC40X2EA的过程和两个实用子程序。     

利用并行口的EPP模式制做“虚拟”逻辑分析仪

介绍了并行口的EPP模式 ,阐述了如何使用EPP模式制做逻辑分析仪 ,并且给出一个使用虚拟逻辑分析仪分析逻辑电路的实例及实验结果     

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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