电工电子实验教学管理与考核系统

电工电子实验教学管理与考核系统的开发是把先进的计算机技术和网络技术引入实验室，对传统的实验及其考核方法进行改革，以提高实验课程管理的科学性、考核的合理性。整个系统主要由四个部分组成：实验课堂管理、实验考试管理、实验成绩管理、进入实验。采用C＋＋Builder6作为系统开发平台，以SQL Server2000作为后台数据库。介绍了该系统的总体构思，并对系统的功能及应用加以简要说明。     

用面向对象描述法构造光学系统部件数据结构

运用面向对象方法对光学镜头进行描述。采用VC＋＋语言建立特征类系统，构造光学系统零部件的数据结构。这种方法具有结构简单，可移植性强，重用化高等特点。     

浅析Java与C＋＋的垃圾回收机制

随着计算机网络及计算机技术的迅速普及，计算机编程语言也发生着改变，现流行的面向对象语言不断趋于成熟。运用面向对象语言编写的大型系统也越来越多，但是无论采取哪种面向对象语言，系统运行效率和系统性能是其赖以生存的条件，因此内存的释放即垃圾回收机制就显得尤为重要。。     

VC++中实现PC机与单片机的串行通讯

应用VC 中的MSComm控件实现了在工业控制领域中常用的PC机与单片机的异步串行通讯，使用MSComm控件编程简单，能够满足串行通讯的要求，对于工业监控系统和数据采集系统都是非常有用的参考。     

变频调速在粗纱机上的应用

通过对粗纱卷绕成形系统的分析，应用机电一体化技术，提出了一种由工控机、PLC控制5电机变频调速的新型粗纱传动系统，同时讨论了控制部分及软件部分的设计。     

一种Web方式调用Tuxedo服务的方法及其应用

在用Tuxedo作为中间件的系统中，用Visual C＋＋、Visual Basic及ASP语言结合实现了Web方式调用Tuxedo服务，描述了这种方法的基本原理，详细讨论了方法的具体实现，并在湖南省长沙市商业银行财库行系统中得以应用。     

Java和C＋＋异同点的研究

随着Ｉｎｔｅｒｎｅｔ迅速发展，ＷｏｒｌｄＷｉｄｅＷｅｂ日益普及，整个计算环境正在经历着深刻的变革，Ｊａｖａ是一门刚出现不久的网际程度语言，它作为ＷＷＷ上系统开发的主要工具很可能是未来的主流之一，本文通过与Ｃ＋＋语言的对比，具体论述了它们之间的异同步。     

VC++串行通信技术在监控系统中的应用研究

本文针对监控系统的要求，介绍了串口通信的编程方法，并利用VC 中的多线程技术，实现了对串口的读写操作，开发出一套集监视、控制和管理为一体的监控软件。     

量值返回时产生的系列问题

针对函数以值的形式返回时，C 系统产生的无名临时变量或对象对程序的影响，文章介绍了一些程序中易被忽视的问题并提出了相应的解决方法。     

VC++中DLL的应用

动态连接库(DLL)在Windows系统中扮演了极为重要的角色，它不仅应用于Windows系统中，也广泛应用于各种应用程序．介绍了如何利用DLL和钩子函数取得系统其他进程密码框内的密码，同时在程序中使用了很多其他Windows编程技术，如进程间通讯(IPC)等。     

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     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

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