基于Teamcenter Engineering的产品数据管理的研究实现

本文在对ugs公司的PLM系统Teamcenter Engineering进行了分析介绍,对其客户端核心Portal Kernel进行了分析,并就在该系统中进行产品数据管理进行了研究,进行二次开发,研制了一个基于Teamcenter Engineering的产品数据管理的原型。     

“11.15”火灾的系统与风险分析

针对上海11.15重特大火灾事故,对事故进行了系统分析,利用故障树对事故原因和风险进行了分解,对火灾的主要原因进行总结归类,对火灾进行了突变分析,探讨了本次火灾事故中凸显的一些特别的经验教训.     

网络远程考试系统RTS的研发

对基于网络的远程考试系统进行了分析,对系统功能和特点进行了描述,对系统体系结构和数据库结构进行了设计,给出了本系统开发和运行环境,对部分子模块的实现进行了描述。     

坪江电站电气部分设计研究

针对坪江电站工程的电气部分进行了较为祥细的设计研究,对主要的接线方案给出了比较方案,并进行了技术经济比较,电气设备部分进行了选型,对电气保护进行了系统设计。     

振动流化床的性能分析

本文对振动流化床的性能进行了定性的分析研究,建立了最小流化速度和对流传热系数的数学模型,进行了实验拟合,并进行了性能的分析实验.     

磁流变抛光轮结构设计与磁场分析

目前对磁流变抛光中磁场的研究主要是进行粗略的评估,并不能实现精确的控制.本文对磁流变抛光中的磁场展开了更为精确的分析.首先设计了磁流变抛光系统,并对其抛光机理进行了阐述;其次对磁流变抛光轮的结构进行了设计,并对其实现方式进行描述;进而利用有限元法对磁流变抛光轮内部磁场进行了具体分析,得到了分布合理的梯度磁场.利用在磁感线上取点进行拟合的方法得到磁感线方程,计算磁感线与磁流变抛光轮表面所围成的面积值,可通过有效控制磁流变抛光液的截面流量使其按照指定磁感线进行分布,完成整个抛光过程,从而为利用磁场控制磁流变抛光液进行确定性抛光提供了保证.     

开环数控进给系统圆弧插补的误差分析与建模

对开环数控进给系统进行圆弧插补时产生误差的原因进行了分析,针对圆弧插补误差建立了数学模型并进行了圆弧插补单位线性误差值的计算,通过在数控装置上对整圆进行切削实验,标定误差值,对模型计算值和实验值进行了检验.     

刀具调度系统的设计

本论文对刀具调度系统进行了初步的概述,对系统进行了方案设计,建立了刀具数据库,并对系统的各功能模块进行了简述.     

基于ADAMS的单侧自卸式矿车曲轨优化设计

首先对常用矿车进行了介绍,并对单侧自卸式矿车的工作原理进行了分析,找到了现有矿车卸载时的不足,然后在分析的基础上得到了较为合理的曲轨卸载曲线,并同时对矿车卸载时进行了稳定性校核,最后采用机械动力学软件ADAMS进行仿真验证.     

工业循环冷却水系统的防腐研究

本文对工业循环冷却水系统的水质现状进行了分析,并介绍了其的腐蚀原理,并综述了工业循环冷却水系统的防腐措施以及其进展,并对这些方法进行了说明,着重对添加缓蚀剂的方法进行了讨论。最后对该系统的防腐技术发展进行了展望。     

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

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