单片机串行口的扩展方法

介绍了扩展串口的方法以解决在实际应用中遇到的单片机串行口资源不足的问题，为解决这个问题，分别介绍了硬件串行口扩展和软件模拟串行口方法，给出了实际的硬件电路原理及软件程序段，以及对多种解决方案进行比较．     

一套组合式设计性实验——模拟多功能多路报警器

本文从设计模拟多功能多路报警器实验出发。对信号接收电路、音响电路、逻辑电路进行设计．不仅能各自为一个设计实验。又可组合成报警器设计实验．同时对该报警器的实际应用具有借鉴作用。     

非线性电阻电路的单故障诊断的一种方法

提出了非线性模拟电路故障诊断的一种测前模拟法．应用伴随电路及特勒根定理导出故障诊断方程，用等电位屏蔽技术识别故障．非线性元件用其工作点参数等效线性化，可对故障电路逐级分块诊断，适用于大规模线性和非线性模拟电路．     

模拟电容与电感及其仿真分析

模拟电容与模拟电感在集成电路中得到了广泛的应用．本文引入模拟电容与模拟电感模型，对两模型电路作了详细的时频分析和EWB(Electronics Workbench)软件仿真分析．以五阶Butterworth滤波器电路为例，通过对滤波器电路及其仿真电感替换电路的仿真对比分析，进一步验证了仿真电感模型的电感特性．     

区间分析法在容差子网络级故障诊断中的应用

研究含有容差的模拟电路故障诊断是工程实际遇到的问题，是故障诊断理论走向应用的关键一步，本文探讨应用区间分析的方法作为容差子网络级故障诊断的工具，以期引起这方面的研究．     

GPS授时系统在七号信令集中监测系统中的应用

主要讨论了GPS授时系统在七号信令集中监测系统中的应用。根据七号信令集中监测系统的体系结构及其各组成部分对时间精度的实际要求，具体分析了GPS时间同步原理及实现电路。并利用GPS授时系统构建七号信令集中监测系统远端站和中心站的时间同步系统方案。     

Fuzzy数学在分层模拟电路故障定位中的应用

本文提出了应用模糊数学进行模拟电路故障定位的一种方法，并运用实例验证此方法是实际可行的。     

基于3G技术的电动车报警定位系统研究

结合3G技术在远距离监控、数据采集、GPS定位、无线报警等领域的应用,设计了基于3G技术的电动车报警定位系统,分别对系统的单片机电路、通讯电路、卫星定位电路进行了设计,实际使用情况表明,系统工作准确及时,最大限度降低电动车被盗几率。     

利用模拟电感改进Chua电路的研究

首先介绍了Chua电路及其特性，给出实现非线性电阻的一种电路；然后设计了一种用集成运放、线性电阻和电容组成的模拟电感电路，利用模拟电感对Chua电路进行改进，取得了良好的效果；并且利用改进后的Chua电路构成的驱动一响应式混沌同步系统具有一定的鲁棒性、抗干扰等特性，为混沌在保密通信的实际应用奠定了基础。     

基于Multisim12.0的电子线路课程设计初探

为了提高电子信息专业学生对小信号模拟电子技术的应用能力,在实验教学内容中融入实际应用电路,并对典型应用电路进行模拟仿真,通过实例说明Multisim12.0仿真软件在模拟电路实验教学中的应用。实践证明,合理地运用仿真技术,是打破传统的"固定功能模块+连线"的新的设计方法。     

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

正~~