机床设计图形库计算机辅助设计系统——基于ADSRX技术的AutoCAD二次开发技术

针对目前利用ARX（AutoCAD实时扩展）技术进行AutoCAD二次开发存在的复杂性和程序的不易读懂性,着重介绍了运用ADSRX（计算机辅助设计实时扩展开发系统）技术进行、机床设计图形库开发的应用,ADSRX技术避免了因利用ARX技术所带来的程序编制的困难性,使开发程序更加简单,可读性强,通用性好。     

一种基于构件的协同CAD环境

针对当前计算机辅助设计的协同的问题，通过实例阐述了对AutoCAD进行二次开发、实现同步、异步协同设计的思路．利用DCOM的灵活性与AutoCAD的开放性，提出了一种基于构件的协同计算机辅助设计模型和解决方案．     

在AutoCAD中实现协同设计功能的研究

设计参数的存储机制、协同事件的捕捉及传递是构造协同设计环境的最基本功能．综合采用AutoCAD的二次开发技术,提出以XData方式组织设计参数,用VBA程序捕捉、传递对象间的编辑事件,以达到为通用图形对象增加协同设计能力的目标．     

移动实时协同标绘系统的设计与实现

传统的标绘系统都是基于固定的单机设备,不能满足用户的随时随地的实时标绘需求。针对此现状,本文针对移动计算环境的特点设计并实现了具有高度实时性的移动实时协同标绘系统,并引入协同感知、并发控制等技术,使得该系统充分适用于高度动态的移动协同环境。由于本系统具有实时地图标绘、协作交流等功能,因此本系统可以用于紧急情况的协同部署...     

基于特征模型的网络实时协同建模技术

计算机网络实时协同设计实现的关键是协同设计的几何模型在网络环境中实时共享，即实现模型数据的实时传输。原有CAD模型的描述是直接记录三维模型所有组成元素，所记录的数据量太大，不能适应现有Internet网络环境协同设计的要求。本文提出了基于特征模型的网络实时协同设计技术，定义了一种具有通用性的特征模型作为数据交换的中介，以模型的生成元素记录特征模型，模型记录的数据量小，满足了现有网络环境实时传输的要求，并研究了数据的局部操作技术，以实现CAD三维模型的跨平台实时设计和编辑。     

矢量图形动态设备的实时变化技术

在AutoCAD矢量图形的基础上,提出了图形化动态设备的创建及实时技术。在矢量图形中,以矢量图元组合为基础的动态设备,可以根据远程实时信号的变化而同步变化,以表示实际生产设备的状态跃变、模拟量的渐变和数值增减等动态变化。由此,能够以大型矢量化网络图形为基础,集成多种信息,构建大型实时监控系统。     

基于AutoCAD的可扩展的《画法几何》教学系统的开发

以AutoCAD2002为开发平台,用其提供的AutoLISP语言开发《画法几何》电子教学系统.该系统不仅能灵活的表现出《画法几何》中的内容和规律,还可以充分利用AutoCAD提供的强大图形编辑功能,实时对系统产生的对象进行各种编辑操作,在方便教学的同时,也开辟了一个AutoCAD新的应用领域.     

面向UCAV系统的交互Agent协同技术

UCAV的每个组成部分都是一个高技术的复杂子系统，而且各个组成部分相互之间具有很强的依赖性和协调性，其UCAV系统实时交互的正确性依赖于全局实时约束，并且是一个多Agent系统。因此需对多Agent的协同技术进行深入的研究。首先，提出了基于时间约束的部分一全局计划（TPGP），实现了全局约束。其次，研究了任务协同关系，分布实时Agent协同。最终实现了实时约束下的UCAV系统多Agent的协同。     

AutoCAD压印技术研究与应用

为解决应用AutoCAD软件绘制机械工程图样中相贯线绘图这一难点问题,采用AutoCAD软件绘制技术来解决。压印技术是AutoCAD软件的一项三维编辑功能,通过对AutoCAD压印技术的应用,以作图实例重点解决如何应用AutoCAD软件在机械工程图样上准确绘制相贯线的方法、步骤和相关技术问题,该方法为解决该类问题提供了技术参数。     

基于VBA技术实现Excel数据生成CAD对象的方法

本文首先简要介绍了VBA技术、Excel对象模型中的主要对象、AutoCAD中的对象以及在Excel和AutoCAD中使用VBA的基本方法;接着阐述了实现Excel表格到AutoCAD中表格的设计思路以及利用Excel数据绘制AutoCAD图形的设计方法;并给出VBA的编程示例;最后叙述实现Excel与AutoCAD之间数据通讯的方法及技术,展望了利用Excel实现AutoCAD自动化绘图的前景和发展方向。文中给出部分代码、图形及程序说明,并对程序结果进行简单分析,最后给出该技术的作用和应用前景。     

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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