远程调度系统中智能通讯控制器的设计

应用８０９８单片机成功地研制出了一种适用于远程调度系统中的智能通讯控制器，本文着重论述了控制器的硬件结构、通讯接口、软件设计以及主要特点。     

对调度自动化系统在电力市场下的运行分析

文章对电力市场下的调度系统发展的总体技术要求和电力市场下调度系统运营管理等进行了阐述，并分析了电力市场的新发展对调度系统的影响和电力市场下调度网络信息系统的安全性问题。     

电力通讯自动化设备模块与工作模式模块的协调

为了满足当下电力通讯工作的需要,进行设备运作模块及其相关工作模块的协调是必要的。这需要针对电力通信的工作性质,展开线路资源环节及其设备资源环节等的协调,保证非智能资源与智能资源等的利用,保证电力通讯系统的有效发展,保证传输干线数量的控制,实现传输系统容量的提升,保证网络管理程序及其电路调度工作程序等的协调,进行其工作难度的控制,实现其复杂程度的优化,从而满足现阶段电力通讯自动化工作的需要。     

电力系统调度自动化的技术与优化

电力调度自动化系统是指直接为电网运行服务的数据采集与监控系统，包括在此系统运行的应用软件，是在线为各级电力调度机构生产运行人员提供电力系统运行信息、分析决策工具和控制手段的数据处理系统。先进稳定的自动化系统不仅可以保证电力企业经济效率，而且能保证广大用电户利益。文章结合电力调度实际管理特点，从如何提升电力调度自动化系统性能指标、可靠性两个层面，提出了采取冗余容错结构、采取网络冗余热备份等相关措施。     

GPRS网络在山区供电所远程抄表系统中的应用

偏远山区的电表抄表问题是山区供电所一直希望解决的问题,文章提出了一种基于GPRS通讯技术的电力远程抄表系统,详细介绍了该抄表系统的工作原理及软、硬件结构设计。系统的基本设计思想是将GPRS终端经由GPRS网接入Internet,通过设置Internet中通信中心服务器与客户端服务器之间的通讯协议,实现终端与客户端的信息交换。在四川电网的试运行表明该系统具有良好的技术特性：数据流量达到500k-600kBytes/min,通讯可靠率大于93%,通讯速率达到5 4kbps～114kbps,系统误码率低于0.1%。该系统及其先进技术可在电网抄表领域获得广泛应用。     

基于查表法的CRC检错码在CDT远动规约中的研究及实现

CDT通讯规约在我国电力调度系统中应用广泛，但规约本身存在着传输效率不高等缺点．本文讨论了CRC的原理，提出一种适用于CDT远动规约的CRC查表算法，并给出了CRC校错码在8051单片机中软件实现的源代码．     

基于无线通讯技术的计算机远程监测管理系统

随着我国经济社会的发展和城市能源结构科学化管理水平的不断提高,计算机远程监测管理系统的应用越来越广泛。采用能源测量技术和计算机技术相结合,通过基于无线电台通讯和基于GPRS通讯两种无线通讯技术来实现数据传输的方式,达到对供电、供热、供水、环境监测等管网系统进行远程实时数据采集、实时传输、实时处理,动态地反映管网的运行状况,并通过远程控制,对管网系统进行合理的调度和管理,以实现管理现代化。     

低压远程集中抄表系统的组成及其应用

随着国家用电网络急剧膨胀,供电企业对用电网络的管理任务日益加重。低压电力用户集中抄表系统作为一种投资相对较少、安装及维护方便、通讯可靠、计量准确的电能表远程集中抄表解决方案应运而生。本文主要介绍低压电力用户集中抄表系统的组成以及重庆市电力公司杨家坪供电局应用该系统后产生的效益。     

CDMA1X／GPRS电力调度自动化通信系统方案

电力调度自动化系统帮助调度员及时了解、掌握电力情况，监控电网信息，通过对电力信息的实时掌控可以优化资源调配，更有改地用和调配有限的电力资源。本篇是CDMA1X／GPRS电力调度自动化通信系统方案的介绍。     

关于电力调度系统信息化的研究

随着信息化技术的广泛应用，其在电力领域也得以推广应用，国内各调度部门也建立起各类的信息应用系统。电力信息网络的发展已深入至电力管理和生产的全过程，与生产的各层面均有联系。因此，电力管理与生产对调度信息化具有很强的依赖性。分析了电力调度信息化的主要内容和数据架构，并对信息化在电力调度系统中的应用进行探讨。     

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