基于C8051FO20单片机控制的USB数据采集系统设计

设计了以C8051FO20单片机作为处理器,通过控制CH375-USB主控芯片实现单片机对存储介质(U盘)数据存储操作的数据采集系统;并介绍了C8051FO20单片机和CH375-USB主控芯片的技术特点;完成了USB设备写入的程序设计。     

技术转让

RMS-3型无线电自动监测系较编号：J980734该系统研制了以16位单片机为核心的接收机控制板,完成数据采集、处理与接收机控制,增加了RS-232C标准串行接口与PC机进行通信。系统软件完成微机对接收机控制、数据处理、显示打印等。整个系统在微机控制下,自动完成无线电监测、监听     

大棚模糊温度控制器的设计

大棚蔬菜在人们生活中占据重要地位。在控制大棚蔬菜生产的各种因素中,温度的监测与控制是最重要的一个指标。文中详细介绍了大棚模糊温度控制器的硬件和软件设计。此控制器主控部分以Microchip公司的8位单片机PIC18F252为控制核心,采集测温电路输出电压,实现模糊控制;在软件方面,以模糊控制为核心的控制算法,实现恒温控制功能,用C语言完成整个控制系统的软件编程。此系统占用微处理器的端口较少,可节省大量的引线和逻辑电路。与传统装置相比,具有结构简单,成本低,可靠性和测温精度高、应用面广等特点。     

单片机与变频调速技术的综合应用

介绍了单片机与变频器的综合应用系统.该系统采用8098单片机和富士变频器作为主控部件,既可单独对变频器功能进行开发研究,又能够组成微机控制的交流变频闭环调速系统,适合实验教学及特殊环境下的工程应用.     

基于C8051F020的数据采集处理系统的设计与实现

本文采用C8051F020单片机作为核心处理器,设计一个数据采集与处理系统,对C8051F020单片机、数码管驱动和键盘扫描控制芯片CH451的特点进行了介绍,重点介绍了系统的硬件设计电路和系统的软件设计。该系统基于单片机为主控芯片实现数据采集、传输及处理的功能,通过采集压力、温度和流量数据,以模拟信号的形式传输到C8051F020单片机,并在数码管上显示出来,并对数据和采集的时间进行存储。该系统数据采集精度好、可靠性高、成本低、功耗低,可以应用在各种试验的数据采集和处理中,具有很高的工业使用价值。     

基于ColdFire微处理器的消防报警控制器设计

为提高分布式消防报警系统的处理能力和反应速度,采用32位ColdFire微处理器MCF5282设计了一款消防报警控制器.阐述了系统结构及硬件接口扩展电路的设计,给出了系统信息流图和软件设计思想.该系统能够完成复杂的联动控制逻辑运算处理,具有很强的智能性和良好的实时反应能力.实际应用表明,高性能微处理器的引入使消防报警控制器的性能得到了较大的提高.     

基于单片机的红外发射器

本设计便是采用MCS-51系列AT89C51的8位单片机微处理器,通过软件模拟实现红外遥控编码的发射。从而达到本设计的目的——基于单片机的红外遥控发射器。本论文介绍了红外线遥控通信的原理,给出用单片机AT89C51作为遥控编码发射的实现方法。包括按键电路、调制电路、红外发射原理图及其编程的主要思想和流程图,从而完成此设计的要点,参考统程方程图的构思过程,编写出了应用软件。红外发射电路具有体积小,低消耗,低成本等特点。     

基于AT89C51单片机的设备监控系统研究

介绍了微机通过RS-232串口连接一个测量被监控设备某个参数的AT89C51单片机系统。微机端的程序定时向单片机系统发出查询要求,单片机系统收到后就进行一次测量,并将测量结果返回给微机,且绘制成连续变化曲线,以实现监控。     

基于单片机的数据采集与处理系统的设计

采用具有ISP功能的STC89C51单片机,设计了一个数据采集与处理系统,对STC89C51单片机和串行A/D转换芯片TLC2543的特点做了介绍,重点阐述了TLC2543的硬件设计以及与单片机的接口电路.使用VB6.0设计上位机程序,完成了数据采集、传输及处理的功能.文中给出了具体的数据采集程序及部分上位机程序.该系统经过实验,取得了较为满意的控制效果.     

微机控制的脉冲MIG/MAG焊接电源的研制

主电路采用IGBT为主控开关功率转换器件 ,利用 16位高性能单片机 80C196KC ,对微机控制脉冲MIG逆变弧焊电源的组成和控制原理进行实时精确控制的研制 ,并做了可靠性与抗干扰设计 .研制结果表明 :该焊机脉冲频率带宽大 ,为 0 .5～ 2 5 0Hz ,响应速度快 ,抗干扰能力强 ,能够满足全位置焊接的需要 .     

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.     

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     

Journal of Donghua University ( English Edition) Contents of Volume 31

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