基于MCGS仿真系统的实现

提出了利用MCGS组态软件,结合VB和Fortran混合编程开发控制系统仿真软件的方法,并介绍了其实现过程。仿真界面由MCGS实现,模型计算利用Fortran实现,由VB编写的驱动程序动态调用Fortran程序,然后用OLE自动化技术实现MCGS下的VB嵌入式编程,最终实现仿真过程。     

基于组态软件和MATLAB的水位模糊控制系统

提出了一种利用MCGS组态软件和MATLAB开发的水位模糊控制系统实现方案。在该系统中,利用组态软件MCGS完成数据采集、控制信息输出以及人机交互等工作,利用MATLAB完成模糊控制算法运算,在MAT-LAB和MCGS之间通过动态数据交换(DDE)协议对过程变量、控制变量和设定值实时更新。通过对水箱的控制实验,结果表明该系统是可行的,并且具有较好的开放性和灵活性。     

基于MATLAB和MCGS的智能控制算法工程实现

针对智能控制算法在监控系统实现过程中,硬件成本高及软件编程难以实现等问题;引入MATLAB设计智能控制算法,利用MCGS监控算法及控制过程,将MATLAB丰富的算法与MCGS良好的人机接口相结合,解决了智能控制算法实现难的问题,提高了系统的监控质量。实践表明:该算法实现简单,控制性能稳定,节省了成本,缩短了开发周期,在实际控制过程中切实可行,具有良好的实用价值。     

基于MCGS和MATLAB的薄膜厚度控制系统仿真

以MCGS组态软件和MATLAB为平台,设计和仿真了一个薄膜厚度控制系统。MCGS完成硬件接口的设置、数据的实时采集、人机对话、以动画的方式显示控制系统的运行情况,MATLAB完成PID参数的自动整定,并利用动态数据交换(DDE)技术建立两者间的通讯。仿真结果表明,本控制系统超调量小、响应速度快、自适应能力强,而且操作方便、显示直观,具有较大的应用价值。     

基于OPC技术的MATLAB实时过程控制系统

使用OPC技术将MATLAB与现场过程设备连接,实现了MATLAB仿真在现场设备的实时控制.通过MATLAB的S imu link实时读取数据和控制设备.利用MATLAB在工程计算方面的强大能力和组态软件在现场实时数据采集和监控系统方面的优势,使MATLAB仿真不再只局限于传统的离线计算和纯数字的仿真,而易于在实际系统上实现先进算法.以单神经元PID算法为例验证了系统的可行性.     

组态软件MCGS及其在电机变频调速监控中的应用

介绍了全中文工控组态软件MCGS的基本功能和主要特点,以电动机变频调速系统的监控为例,阐述了MCGS的组态过程及实现的主要功能.利用MCGS组态软件,采用模块的形式,制作出电动机转速的动态监控画面.工作人员通过该监控画面可以实时了解电动机的运行情况,进行故障检测及报警.     

非专业编程人员也能实现远程数据的监测

主要介绍MCGS组态软件的功能和利用MCGS实现远程数据监测的简单过程。     

基于MCGS的机械手仿真控制系统设计

本系统的设计主要利用MCGS组态软件进行机械手控制系统的仿真界面设计及过程控制仿真实现。目的旨在仅通过组态软件的运行而无需与PLC设备的连接与通讯,便能看到PLC实际控制机械手的完整控制实现过程。     

基于PSIM和MATLAB/Simulink的Buck电路的联合仿真

结合PSIM在功率仿真方面的优势及MATLAB/Simulink在控制仿真方面的能力,在MATLAB/Simulink和PSIM联合仿真平台上,联合建立Buck电路仿真模型.仿真结果表明,利用PSIM和MATLAB/Simulink进行联合仿真,可充分发挥PSIM及MATLAB/Simulink各自的优势,简化建立仿真模型的过程,大幅度提高仿真速度.     

MCGS在执行系统回转精度动态检测中的应用

为了解决传统测控软件开发周期长、成本高、通用性差的问题,根据谐波分析原理,在执行系统回转精度在线动态检测系统中引入MCGS组态软件技术.采用ST-2型非接触电涡流位移振动传感器采集信号,采集板卡负责接收信号并输送到工控机,完成了径向跳动量、轴向窜动量和角度摆动量3个项目的测试.MATLAB仿真结果表明,基于MCGS组态软件开发的测试系统,完全能够满足高速运转的执行系统回转精度测试的要求.     

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     

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