基于状态观测器的分数阶统一混沌系统的同步控制

基于状态观测器控制法，提出一种分数阶系统状态观测器，实现了2．7阶统一混沌系统的同步控制，Matlab仿真结果表明，基于状态观测器的控制方法不仅适用于整数阶混沌系统，也适用于分数阶混沌系统．利用该方法实现混沌系统的同步，无需计算系统的Lyapunov指数，在工程上易于实现，为混沌系统及分数阶混沌系统在实际中的应用奠定了理论基础。     

基于构件的自动查询系统

基于构件思想，采用SQL Server数据库系统的系统数据库和系统表、ASP等技术，实现了自动查询系统。系统用户可以自行设置筛选条件、显示结果。同时，系统具有一定的通用性，支持多种查询方案，根据查询条件对结果进行筛选，然后将查询结果导入Excel文件，完成打印输出。     

智能大楼概述

简要介绍了智能大楼的技术配置及其智能化的主要内容，其中包括：办公自动化系统，电话通信系统，广播电视系统，供电照明系统，通风空调系统，水工调控系统，消防监控系统，保安监控系统和设备控制系统等。     

钨粉还原炉计算机自校正调节系统

介绍了钨粉还原炉计算机控制系统的控制方案，组成原理，硬件电路和软件框图．在本系统中，还原炉多段温度的控制，采用最小方差自校正调节器，氢气流量的调节，用控制中间容器压力的方法，系统调试结果表明，本系统设计合理，控制功能强，工作可靠，操作方便，是钨粉还原炉较完善的一种计算机控制系统．     

银行计算机系统安全分析

现代银行业和传统银行在信息应用和深入程度上有很大区别，银行业对信息技术的依赖程度大大超过以往，对计算机安全系统的安全度要求也更高。银行业务不断创新，对安全系统提出了新的要求。另外，只有计算机系统安全正常运作，银行业务才能持续不断进行。目前，银行系统信息快速高度集中、系统逐渐网络化也带来了系统的脆弱化，数据越多，系统越网络化，漏洞就越多，风险就更大。     

浅析DEH系统的控制功能及特点

介绍DEH系统的组成和特点，分析DEH系统的控制功能，以及系统本身的故障自诊断，容错能力，软、硬件冗余配置，并介绍DEH的故障分析及维护方法，阐述系统在维护电厂安全运行中的重要性。     

关于直流管理系统的可行性分析

随着科技技术的不断进步和发展，直流系统成了发电厂，变电站中十分重要的配套系统，直流电源在线综合管理系统具有一定的工程实用价值。本文着重研究直流电源在线综合管理系统，在深入分析的基础上，描述了该系统结构，提出了系统应实现的功能及技术指标。     

基于L^＊系统的一种非单调推理系统

研究了非单调优先推理系统P和累积单调推理系统CM，以及模糊命题演算的形式演绎系统L^*，在L^*系统中定义了后承关系|～：A|～B当且仅当A^2┠B，证明了在L^*系统中的这种后承关系满足累积单调推理系统CM，非单调优先推理系统P的全部规则，但这种后承关系不满足单调推理系统M的逆否律规则，从而在L^*系统中建立了一个介于非单调推理系统和单调推理系统之间的逻辑系统，这为两种系统的理论研究建立一个桥梁以及为模糊控制提供了一种新的思路。     

无闭轨Lienard系统的拓扑分类(Ⅰ)——九种粗结构

Ｌｉｅｎａｒｄ系统是一种基本的微分系统，但对Ｌｉｅｎａｒｄ系统拓扑分类问题，至今尚没有系统的研究工作，为此对Ｌｉｅｎａｒｄ系统做一个粗分类，这是拓扑分类的必要准备工作     

子群系统的研究与实现

研究并实现了一种新颖、独特的子群系统，该系统无需定时提取和帧同步系统。系统终端采用８７５１单片机作主控，整个系统体积小，功耗低，性能稳定，易于实现。语声质量符合国家标准。     

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     

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~~