探究机电安装施工技术中消防弱电系统的安装

机电安装施工过程中,消防弱电系统的安装包括许多方面.如闭路电视系统,电话系统,火灾自动报警系统等.该文以闭路电视以及系统,电梯工程安装和中央主机及末端设备安装为例,说明了消防如电系统安装的复杂性和重要性.并提出控制消防弱电系统安全质量问题控制的具体措施,分析了消防弱电系统安装时易出现的问题并予以解决.     

MQX操作系统启动流程剖析

针对嵌入式操作系统启动流程中的内核数据区的结构及其初始化,MQX运行所需系统中断和时钟滴答的初始设置,系统初始化任务及其空闲任务的创建与启动等问题.提出了实际应用中冷热复位区别启动、系统滴答时钟调整等问题的操作系统内核级解决方法.结果表明该方法提升了带MQX操作系统的应用项目的实时性、稳定性、鲁棒性等性能.     

基于JSP的在线答疑系统

网络在线答疑系统能够为师生之间提供一个非面对面相互交流、探讨问题的网络空间.开发一种基于JSP的MVC框架的网络在线答疑系统,其功能主要包括学生提出问题、学生查看问题、教师查看并回答相关问题和讨论问题等.结合JSP、MVC、MySQL数据库等相关技术,给出一套实现基本功能的方案.     

面向运作系统的协调优化理论与方法

面向运作系统的协调与优化问题是指为了提高运作系统的效率和应对不确定环境的能力而提炼出的一类相关科学问题.这类协调与优化问题的基本特征是非线性、多目标、变结构以及决策信息的不确定性,一直是国内外研究的热点和难点.我们以运作系统中的理论与实际问题为研究对象,从需求预测、系统设计、运营和风险控制等多个方面开展了深入的研究工作.重点研究了运作系统的非平稳需求预测与决策、供应链协调与集成设计优化以及面向运作系统的风险预测与控制等问题,取得了一些原创性的理论成果,在一定程度上带动了国内外相应方向研究的发展.     

辽河流域水污染源在线监测问题

为解决辽河流域水污染源在线监测系统存在的问题,运用层次分析法对辽河流域水污染源在线监测系统存在的问题进行评价和顺序排名.结果表明:对辽河流域水污染源在线监测系统监测结果的准确性影响较大的因素依次为采样点位、试剂问题、采样频次、标准溶液的管理、仪器选型等.该成果对辽河流域在线监测系统的改善具有参考价值.     

具有饱和输入的非线性组合系统的分散镇定

考虑了具有饱和输入的非线性组合系统的镇定问题.利用李雅普诺夫方法和矩阵范数性质研究了具有饱和输入的非线性组合系统区域分散控制问题.给出了该系统的区域的分散镇定控制器的设计.相似组合系统出现在电力系统等领域,考虑了一类具有饱和输入的非线性相似组合系统,利用相似结构的特点,给出了这种系统简洁的区域分散镇定的条件.     

公安电子政务系统的实现

随着网络技术的发展,电子政务系统也在网上广为应用.针对某市公安局电子政务系统系统资源不能共享等问题,运用软件工程和数据库理论,研制了新公安电子政务系统.介绍了其特点、作用与功能.给出了系统的设计和实现方法及有关的软件程序.运行结果证明了系统的可靠性.     

用神经网络技术建造碳钢和低合金钢大气腐蚀知识库

简要介绍了传统专家系统知识库所存在的问题,提出了一个基于神经网络的碳钢和低合金钢大气腐蚀知识库系统,并着重阐述了这种新型知识库系统的知识获取、知识表示和系统的实现等问题.     

DCS应用中的关键问题探讨

DCS系统近年来在电厂,化工厂,煤矿,水处理等厂矿企业中得到了广泛应用和快速发展.在应用DCS系统过程中也遇到了各种不同的问题,本文对于实际应用中遇到的布线、接线、电源、接地等问题给出了解决方案或参考方法.     

系统动力学模型在采办风险评估中的应用研究

针对武器装备采办过程中的风险管理问题是一个复杂系统问题,提出了运用系统动力学(SD)方法解决风险评估与管理问题的构想.以系统动力学理论为基础建立了采办风险模型,从多个方面分析了武器装备采办各因素的相互关系和风险来源.通过实例进行了系统动力学仿真计算和结果分析,得出了影响采办项目完成的风险因素,并对某一阶段进行了预警分析.研究结果表明,系统动力学(SD)对于采办风险评估、风险监控等具有应用价值.     

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