基于ARM和GPRS的远程监控供水系统设计

以某温泉供水系统设计为例,介绍了一种基于嵌入式ARM和GPRS技术的远程监控供水系统设计方法.系统可分为分站、监控中心、数据服务中心3个部分,监控中心运行监控组态软件,数据服务中心提供数据中转,利用GPRS技术对分站供水进行集中监控.重点给出了分站嵌入式ARM主控板的软硬件设计.实际运行证明,该系统运行正常稳定,效果良好.     

基于Android供水管网移动端巡检系统设计

目的解决传统的经验式供水管网巡检模式导致的巡检效率低、监控手段落后、抢险维修应急反应不及时和管网系统信息利用率不高等问题.方法分析供水管网现状,结合企业科技化需求,提出一种结合Arc GIS管网地理空间系统和SCADA管网监测点的监控系统,以Android移动终端为平台,利用终端GPS定位系统和4G网络通讯交互的现代化技术,以SOA设计理念和Ajax技术设计系统架构,利用UML序列法对供水管网巡检系统应具有的主要功能进行设计.结果构建集供水管网信息采集、巡检系统导航定位、管网事故抢险维修和系统信息管理为一体的供水管网移动端巡检系统.结论实现了供水管网巡检的高效智能运行,提高了企业信息化水平.     

区域供水工程自动监控系统设计方案

结合区域大型供水工程的特点,利用现代信息技术设计了区域供水工程自动监控系统,对系统的总体结构和功能进行了阐述,提出了供水工程遥测站、分调度中心、调度中心、数据通信网络和软件系统的构建方案,探讨了提高系统可靠性的措施．     

小浪底电厂计算机监控系统电源网络安全性分析

小浪底电厂是一个百万千瓦装机容量的大电厂,现场设备自动化程度非常高,设备的运行操作主要通过电厂计算机监控系统来完成。电厂计算机监控系统的稳定运行是小浪底电厂安全运行的重要保障,而电厂对计算机监控系统电源的合理配置,又是保证监控系统安全运行的基础。     

富拉尔基区供水监控系统的设计

主要介绍富拉尔基区供水企业供水监控系统的设计方法,内容包括监控系统的硬件设计、软件设计。     

面向对象的计算机多路监控系统设计与开发

借助单片机系统的多路视频切换，利用面向对象的C＋＋程序设计语言，阐述了计算机多路监控系统的设计和开发。     

Wincc在多级供水任务监控系统中的应用

介绍了基于西门子监控软件Wincc的微机监控,设备的硬件设计和软件编程,供水控制仪表的选用、控制方式和监控原理以及系统的实际运行效果,指出该系统实现了液位控制、流量控制、水温控制及生产过程监控的自动化,既保证了生产的安全、连续、稳定运行,又达到了节能的目的,是电解铝厂生产和管理的理想设备.     

高压水泵站实时监控系统

随着工业自动化技术的不断发展，控制系统中的上位监控程序显得越来越重要，笔者结合高压水泵站项目对监控系统的设计进行了一定的研究，介绍了高压水泵站的基本运行过程和控制系统的基本组成，系统采用上下位控制结构，由多台PLC组成控制网络实现对现场设备的控制，讨论了面向对象的程序设计技术在监控系统设计中的应用方法，最后简要介绍了监控系统的主要功能模块和关键技术。     

厂用电监控系统在电厂的应用

本文介绍了厂用电监控系统的构成模式,利用微机保护测控装置、现场总线技术、计算机网络监控技术实现对设备的控制、监视、保护和通信。简述厂用电监控系统（ECS）在电厂的主要功能。分析了电气监控系统的发展前景,归纳了其控制特点,并总结了计算机网络监控技术、微机保护测控装置、现场总线技术的优势。     

城镇供水监控管理系统的实现

本文利用现有成熟的水文自动测报系统设备,应用单片机技术和Delphi编程工具.从硬件和软件两方面对城镇供水网络进行机电一体化改造和多层分布式平台开发.实施实时远程自动化监控,高效管理好一个有较大规模电磁计量系统的城镇供水网络.     

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     

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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Brief Introduction to “Journal of Jilin University( Science Edition) ”

<正>"Journal of Jilin University(Science Edition)"is a comprehensive academic journal in the fields of science sponsored by Jilin University and administrated by the Ministry of Education of the Peoples Republic of China.The journal started publication in 1955.The original name at starting publication was"Journal of Natural Science of Northeast People University",which was changed into"Acta Scientiarum Naturalium Universitatis Jilinensis"in 1958 owing to the name change of the university.The present journal name has