基于MATLAB软件的直流调速系统辅助设计

采用ＭＡＴＬＡＢ软件中的控制工具箱对直流电动机双闭环调速系统进行计算机辅助设计,并用ＳＩＭＵＬＩＮＫ进行动态数字仿真,结果表明,用ＭＡＴＬＡＢ软件是控制系统设计与仿真的一种功能完善,编程简单,且具有较高精度的有力工具。     

MATLAB在机械优化设计中的应用

ＭＡＴＬＡＢ是功能强大的工程计算及数值分析软件。在机械优化设计中，利用ＭＡＴＬＡＢ的“优化”函数，可简化编程；利用ＭＡＴＬＡＢ的绘图函数可用图形法求优化结果。     

MATLAB 环境下的串行通信

本文介绍的在ＭＡＴＬＡＢ环境下利用ＭＥＸ函数实现串行通信的方法 ,使ＭＡＴＬＡＢ能通过串行口获取外部数据 ,为利用ＭＡＴＬＡＢ进行动态数据分析提供了方便 ,大大拓宽了ＭＡＴＬＡＢ的应用范围 .1　ＭＡＴＬＡＢ的ＭＥＸ文件ＭＡＴＬＡＢ的ＭＥＸ文件是由ＭＥＸ源代码文件经过适当的编译和链接而生成的动态链接子程序 .用户可用Ｃ/Ｃ + +编写子程序 ,然后通过ＭＡＴＬＡＢ的ＡＰＩ函数库将子程序编译成动态链接函数 (库 ) ,即ＭＥＸ文件 .ＭＥＸ文件的作用类似于ＭＡＴＬＡＢ的内建函数 ,可在ＭＡＴＬＡＢ环境中直接调用或链接这些子程…     

用MATLAB语言开发CACSD应用软件的一种方法

本文采用目前较流行的ＭＡＴＬＡＢ语言,开发出一个基于典型单闭环及串级控制系统的计算机辅助设计与仿真分析的Ｗｉｎｄｏｗｓ应用软件,本软件充分利用ＭＡＴＬＡＢ语言提供的Ｗｉｎｄｏｗｓ图形用户界面设计及其仿真工具ＳＩＭＵＬＩＮＫ的强大功能。     

MATLAB在计算机控制系统中的应用

本文简要介绍了计算机控制系统的设计方法．同时，通过ＭＡＴＬＡＢ的设计实例，说明了在计算机控制系统中，ＭＡＴＬＡＢ速度快、使用方法简便等优点，是控制工程设计中不可多得的工具。     

抽样定理在计算机上的图形表示

利用计算机数学软件ＭＡＴＬＡＢ编程先把连续信号的傅立叶变换信号形象地在计算机上显示出来，然后把抽样信号的傅立叶变换信号也形象地在计算机上进行显示，通过图形对比，可以加深对抽样定理的理解。     

在 MATLAB 语言中间接实现C语言链接

利用科学与工程语言ＭＡＴＬＡＢ提供的环境与高级语言（例如Ｃ语言）结合实现相互调用的接口函数,通过ＣＭＥＸ批处理文件将一源程序生成ＭＡＴＬＡＢ可调用的动态链接库（ＤＬＬ）,从而实现了在基于Ｗｉｎｄｏｗｓ的ＭＡＴＬＡＢ环境下任意间接调用高级Ｃ语言．     

用MATLAB语言解氢原子与类氢离子的定态薛定谔方程

文中探讨了用ＭＡＴＬＡＢ语言解氢原子与类氢离子的定态薛定谔方程,给出了方程的全部实数解,也列出了实用氢原子与类氢离子的定态薛定谔方程解的ＭＡＴＬＡＢ程序,为进一步用计算机解决量子化学与原于结构问题完善结构化学知识体系作了有益的探索     

Dahlin 控制算法的 CAI 软件设计

利用ＭＡＴＬＡＢ软件控制系统工具箱功能强和容易使用的特点,设计了Ｄａｈｌｉｎ控制算法的ＣＡＩ软件．该ＣＡＩ软件功能强、易用,比用Ｃ、ＢＡＳＩＣ等语言设计更简单     

具有消除稳态误差的LQG方法及MATLAB仿真研究

设计了一种去除稳态误差的ＬＱＧ方法，使大气扰动对空空导弹雷达天线角跟踪系统所产生的姿态扰动得到了有效的去除，并运用ＭＡＴＬＡＢ软件进行了仿真研究，取得了比较满意的结果     

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