面向集成的网络CAPP系统的研究与探索

简述了我国CAPP的发展历程和研究与应用现状，提出了CAPP系统应向集成化、网络化方向发展，探讨了面向集成的网络化CAPP系统的体系结构、运行机制及其中的一些关键技术。     

论计算机辅助工艺设计的现状及发展趋势

本文叙述了计算机辅助工艺设计的重要意义和国内外的发展历程,通过介绍几种有代表性的CAPP系统概括了CAPP的研究现状;总结了CAPP现阶段所存在的问题,最后指出了国内CAPP应朝集成化、网络化、工具化、工程化、智能化、知识化发展的趋势。使其更好的用于计算机集成制造系统,提高企业的自动化生产效率、缩短生产周期、增强竞争力。     

基于PDM的CAPP集成系统的研究

由于制造业信息化高速发展,产品数据管理(PDM)越来越受到重视.而计算机辅助工艺规划(CAPP)是基于产品数据管理的集成系统中的关键环节.本文对CAPP的分类、发展过程以及PDM的系统框架进行了论述.对基于PDM的CAPP集成系统中外不同的发展思想进行了简单的介绍,在此基础上详细地论述了基于PDM框架的CAPP系统.基于PDM的CAPP系统可大大提高企业的产品开发效率.     

CAPP的发展及研究现状

全球化和信息化是当今世界经济发展的两个显著特点.本文论述了全球经济一体化环境下,CAPP的发展过程,探讨了CAPP发展的阶段性,论述了现有CAPP系统存在的问题.最后,指明了CAPP技术应研究的关键问题.     

CAPP技术发展趋势中存在的问题及解决方案

本文在分析了CAPP技术的研究现状和发展趋势后,归纳总结出了阻碍CAPP发展与应用的主要矛盾是通用性和专用性之间的矛盾、体系结构和制造模式之间的矛盾。针对存在的问题,提出了从提高CAPP系统的复用性、改善CAPP系统体系结构角度的解决思路,将系统化、工程化的软件复用理论与技术-软件产品线技术运用到CAPP中。     

CAPP的发展及研究现状

全球化和信息化是当今世界经济发展的两个显著特点．本文论述了全球经济一体化环境下，CAPP的发展过程，探讨了CAPP发展的阶段性，论述了现有CAPP系统存在的问题．最后，指明了CAPP技术应研究的关键问题．     

浅谈CAPP系统的分类

本文对CAPP的概念和CAPP系统的分类进行简单阐述,并分别对基于自动化思想的修订/创成式CAPP系统、基于计算机化思想的实用化CAPP系统、面向产品的CAPP应用与制造工艺信息系统和基于知识库的综合智能化CAPP系统各自的特点进行简单阐述。     

浅谈制造业信息化中CAPP系统的应用

随着时代的发展,科技也在不断进步,制造业是我国的基础行业之一。不仅对我国的全面发展有影响,还对人们日常生产生活有重大影响。CAPP系统是企业构建新时代信息化的基础。随着多媒体计算机的深入普及,利用电子计算机辅助CAPP系统工艺设计的现象越来越普遍。笔者将结合自身的经验和调查走访结果,基于CAPP系统的特点,详细论述制造业信息化建设中,CAPP系统的具体应用。     

CAPP开发工具的研究与应用

通过对现有 CAPP系统工作原理的分析和抽象 ,建立了统一的、开放的 CAPP体系结构 ,研制了 CAPP开发工具 ;同时 ,介绍了 TFCAPPTS系统的设计思想和开发策略     

分布式球形容器CAPP系统

文章在讨论现代CAPP系统特点的基础上,分析组件技术、分布式数据库技术对CAPP系统的作用,结合某企业的CAPP系统实施情况,介绍了面向产品的分布式球形容器CAPP系统。     

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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