基于S7200的倒计时交通灯监控系统的设计与实现

以组态软件MCGS为开发平台,利用PLC设计一个交通控制系统。该系统通过上位机和下位机之间的数据传输,以良好的人机交互界面实现对十字路口交通信号的实时监控。用S7200的PLC将PLC的逻辑控制、数据运算、数据传送、数据转换的功能通过程序有机地结合起来,构建完成了既能控制交通灯的变化,也能将灯变化的时间用数码管显示出来的交通信号灯控制系统。给出了系统的硬件接线和PLC软件流程图;并利用组态软件MCGS对该系统进行实时监控,经试验效果良好。     

工业检测系统的上位机软件设计

在一个完善的工业体系中,不仅需要有检测和控制系统,还需要有更为直观的监测系统.另外,随着计算机在工业控制、信息传输中的应用越来越广泛,无人值班、少人值班的工作模式成为当今自动化的发展趋势.通过编写上位机软件来对工业系统进行实时监测,上位机是一台拥有独立IP的计算机服务器,对下位机传送上来的数据进行采集、分析、过滤及存储,利用面向对象的程序设计语言Visual Basic 6.0实现人机交互,通过计算机的串口接收下位机监测到的数据进行实时显示.     

基于ARM9的煤气含量控制系统

本论文是针对ARM9在控制方面的优点,采用实时采集数据,实时通信,实时监控等方法的煤气含量控制系统。本设计采用了基于ARM920T内核的芯片S3C2440来实现煤气含量的监控。本设计主要分为三个部分：PC上位机程序部分、下位机程序部分和煤气含量采集部分。主要的设计思路是：首先由S3C2440控制数据采集模块,实时的监控空气中煤气的含量,并通过异步串口通信方式将数据传给PC上位机,同时PC上位机也通过串口通信将一些控制指令下传给S3C2440,S3C2440在收到来自于上位机的指令后对指令进行简单的分析后根据指令进行动作。系统程序是用EVC＋＋4.0编写的Windows CE6.0操作系统。控制部分包括报警,开关阀门等。数据采集模块则使用TLC1543。煤气传感器则使用MQ216。通过联机调试,证明用ARM9采用实时采集、实时通信、实时监控的方法实现煤气含量控制,效果是可靠的。     

基于EDA的LED屏下位机系统设计

为了开发LED信息显示屏系统,对LED单行显示屏下位机系统进行了研究,利用EDA软件PRO-TEUS建立了基于51单片机的硬件电路原理图,同时在KEIL环境下编写了相应的单片机通信和控制程序。经PROTEUS与KEIL的联合仿真和调试,证明了设计的可行性,开发出了包含从上位机接收字符信息并储存在下位机存储器中的串口通信部分和从存储器读出字符信息并显示的显示控制部分的显示屏下位机系统。     

基于Proteus和Adobe Flash的智能家居远程控制系统的设计与仿真

利用Proteus仿真软件实现智能家居系统下位机部分的设计与仿真,结合Adobe Flash开发丰富多彩图形上位机用户界面,二者通过串口代理服务程序进行串口间的通信,最终实现智能家居系统的远程控制。     

基于WSN的图像采集传输系统的设计

设计基于无线传感网的图像采集传输系统,该系统以支持ZigBee协议的CC2530模块为下位机主控模块,采用串口摄像头模块C328采集图像.上位机软件采用Visual C++6.0开发,实现图片浏览、拓扑显示、数据曲线、数据列表、错误日志等功能.为适应不同的传感器应用,为上位机与下位机之间的通信设计统一的帧格式.实验结果表明:该系统具有能耗低、自组织、易于扩展其他应用等优点,能很好地实现图像传输.     

基于Matlab的开放式六自由度机器人控制系统研究

针对工业机器人控制系统算法封闭的现状,自主设计了一套基于Matlab的开放式六自由度机器人实时控制系统,采用模块化分布式的控制方式,上、下位机以CAN总线进行实时通信,上位机运用基于模型设计的流程进行机器人控制器的开发;下位机以DSP为主控制器,设计6个机器人关节驱动器.控制系统将机器人正运动学、逆运动学、轨迹规划以及通信算法全都融入其中,并且本开放式平台将系统仿真、研发设计、功能测试等环节都统一在Matlab环境中,提高了开发效率.通过仿真和试验验证,该平台能够较好地控制六自由度机器人,具有实时控制、实时监测的功能,并兼具良好的开放性能.     

纳米级光学平台控制系统设计

论述了布拉格光纤光栅刻写过程中所涉及的计算机对纳米级光学平台控制的实现,具体介绍了由PC机与单片机交互式通信控制微动步进电机的控制系统的整体设计构想,详细给出了整机电路设计框图和在Visual Basic 6.0环境下使用MSComm控件实现的上位机控制系统及在Mcs-51环境下实现的下位机执行机构的程序设计思路.     

地下盐岩溶腔三维地貌探测器监控系统设计

为合理利用地下深部废弃的水平盐岩溶腔储存油气,探测腔体三维地貌,设计了一种基于Visual C++6.0的探测器上位机监控系统。采用MSComm串口通信控件与VFW视频捕获技术,通过RS485标准串行接口和光纤实现上位PC机与下位单片机之间的通信,控制探测器运动,并实时显示电子罗盘航向角、电池剩余电量和盐岩溶腔三维地貌。该系统实现了地下深层水平盐岩溶腔三维地貌的实时监控,实际应用表明,该系统通信稳定可靠,视频实时有效。     

嵌入MODBUS协议的涡街流量计数字传输系统设计

针对工业能源计量管理系统的实际需求,设计基于MODBUS协议的计量数据通信系统.涡街流量计(下位机)由飞思卡尔(Freescale)单片机实现嵌入MODBUS协议的数据采集和显示;上位机用VB 6.0编写基于MODBUS协议的程序,实现数据在上位机界面显示,并且将采集的数据值保存到SQLsever2000数据库,上位机与下位机之间通过RS-485总线通讯,最终能够实现能源计量数据的远程自动采集与管理.     

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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