基于单片机的多点温度测量系统的PROTEUS设计与仿真

采用AT89C51单片机作为系统的控制核心,智能温度传感器DS18B20作为测温仪表,采用C语言编程设计了一个多点温度测量系统。首先在PROTEUS上进行该系统的原理图设计,然后在Keil C51上完成系统的程序编写,将PROTEUS与Keil联调,完成该系统的仿真调试,极大地提高了设计的效率。     

Proteus软件在单片机教学改革中的应用

简述了电路与单片机仿真设计软件Proteus的功能和特点,并以基于AT89C51单片机的温控电风扇系统仿真设计为例说明Pro-teus在单片机教学改革中的应用。利用Proteus软件进行单片机课程设计的仿真教学,明显节约了单片机教学成本,有效激发了学生的学习兴趣,取得了更好的教学效果。     

一种基于单片机的计算机控制逆变电源软件设计

设计基于单片机AT89C51为核心设计而成的逆变电源。文章简述了系统中电压信号处理电路AT89C51的设计方法，同时，系统的软件设计采用汇编语言，对单片机进行编程实现各项功能。程序是在Windows XP环境下采用HK-51系列仿真开发系统编写的，可以对键盘输出的信号进行采集控制。     

一种新型无线智能抢答器的研究和设计

本设计采用AT89C51单片机为核心来设计无线智能抢答器,以proteus软件进行仿真,并经过调试和运行使系统达到了预期目标.电路由无线模块、键盘模块、显示模块等几部分组成,具有反应快、功能齐全、实用性强等特点.     

Keil C51中调用汇编语言的研究与实现

在利用C51进行8051单片机应用系统程序设计时,特定的情况下使用汇编语言来编写部分程序会更为方便、高效.本文给出了在Keil C51中应用汇编语言的常用方法.     

LED路灯智能控制系统的设计与仿真

设计了一种LED路灯智能控制系统。系统采用AT89C51单片机为主控制器,可根据环境明暗变化自动控制路灯的开启和关闭,也可以通过键盘手动控制;还具有调光功能,按照设定使路灯驱动电流在一定范围内可调节。分析了路灯智能照明系统的工作原理,并对主要电路用Protues和keil软件进行了仿真验证。     

基于WEB的家庭智能设备的设计与实现

本文介绍了一种新型的基于WEB的家庭智能设备的设计方案与实现.运用双51单片机,以太网控制器RTL8019AS,可编程外围电路控制芯片(PSD),构成了数字家庭的网络化控制系统.给出了系统的总体硬件设计和用C51来进行TCP/IP协议及单片机的软件设计思路,并且实现了在系统可编程(ISP).实际调试表明,系统满足设计要求.     

智能超声波测距系统设计

设计以STC89C51单片机为核心器件的超声波测距系统.硬件电路系统主要包括单片机控制、超声波测距和数码管显示等模块.使用KeilC51对软件系统进行设计,采用Proteus8进行系统仿真实验.结果表明,设计的系统结构简单、智能性高、稳定性好、精度高,动态响应良好.     

基于PROTEUS的单片机系统开发与仿真

利用单片机AT89C51为核心,实现8255A扩展I/O接口,LCD显示,LED静态显示,按键检测,二极管点亮和蜂鸣器蜂鸣,抢答时间计时,确定抢答选手编号等功能,系统巧妙利用锁存器74LS373和译码器74LS138,使电路变得简单实用。设计中使用的编程软件是KEIL软件,对智能抢答器进行proteus软件仿真,仿真结果能够满足应用要求。     

DS18B20在楼宇温度监控系统中的应用

本文以AT89C51单片机为控制核心,利用温度传感器DS18B20测量温度值,实现智能楼宇内环境温度的检测和控制 另外,给出了由AT89C51单片机和DS18B20构成的单总线温度测量系统的硬件电路及软件流程图。系统硬件设计简单,性价比高。     

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.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

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