CAD系统二次开发语言的设计与实现

ＣＡＤ系统二次开发语言的设计与实现王建民，孙家广（清华大学计算机科学与技术系北京１０００８４）ＤＥＳＩＧＮＡＮＤＩＭＰＬＥＭＥＮＴＡＴＩＯＮＯＦＴＨＥＦＵＲＴＨＥＲＤＥＶＥＬＯＰＭＥＮＴＬＡＮＧＵＡＧＥＯＦＣＡＤＳＹＳＴＥＭＳ￥ＷａｎｇＪｉａｎｍｉｎ...     

不连续生产系统的最大加工能力与最优生产安排的强多项式算法

不连续生产系统的最大加工能力与最优生产安排的强多项式算法杨承恩，梁枢里（长沙铁道学院）ＴＨＥＭＡＸＩＭＵＭＰＲＯＣＥＳＳＩＮＧＣＡＰＡＣＩＴＹＡＮＤＯＰＴＩＭＡＬＳＣＨＥＤＵＬＥＯＦＡＤＩＳＣＯＮＴＩＮＵＯＵＳＰＲＯＤＵＣＴＩＯＮＳＹＳＴＥＭ￥Ｙａｎ...     

求多总线系统容错度的多项式时间算法

求多总线系统容错度的多项式时间算法陈四清，周六丁（重庆大学计算机科学系重庆６３００４４）ＰＯＬＹＮＯＭＩＡＬ－ＴＩＭＥＡＬＧＯＲＩＴＨＭＳＦＯＲＤＥＴＥＲＭＩＮＡＴＩＮＧＴＨＥＦＡＵＬＴ－ＴＯＬＥＲＡＮＣＥＤＥＧＲＥＥＯＦＭＵＬＴＩＢＵＳＳＹＳＴＥＭ...     

并行计算模型及其算法设计

并行计算模型及其算法设计李晓梅，窦勇（国防科技大学计算机系）ＰＡＲＡＬＬＥＬＣＯＭＰＵＴＡＴＩＯＮＭＯＤＥＬＳＡＮＤＬＧＯＲＩＴＨＭＤＥＳＩＧＮ￥ＬｉＸｉａｏｍｅｉ；ＤｏｎＹｏｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＣｏｍｐｕｔｅｒＳｃｉｅｎｃｅＣｈａｎｇｓｈ...     

C-MOLD注塑模计算机辅助分析软件

Ｃ－ＭＯＬＤ是由美国Ｃ－ＭＯＬＤ公司开发的注塑模计算机辅助分析系统,它无须重新建模,即可进行注塑分析模拟,这样就给已经拥有并熟悉ＣＡＤ／ＣＡＭ软件的用户带来很大方便。此外,Ｃ—ＭＯＬＤ自带完整的集合造型功能,可以生成各种复杂的曲面。 Ｃ－ＭＯＬＤ常用模块共七个。 １． Ｃ—ＭＯＬＤ Ｍｏｄｅｌｅｒ模型及几何建模 可以对各种复杂的产品曲面进行造型,并能自动进行有限单元网格划分。 ２ Ｃ—ＭＯＬＤ Ｖｉｓｕａｌｉｚｅｒ结果显示 接等值线、光照或按有限单元、单元节点等显示计算结果。 ３． Ｃ—ＭＯＬＤ ＩＧＥＳ …     

SCADA系统与MIS系统实时通信接口的设计与实现

本文描述电力行业中ＳＣＡＤＡ系统与ＭＩＳ系统实时通信接口的设计方法与实现技术。通过自行设计的网桥，实现了以ＮＯＶＥＬＬ网低层软件支持的ＳＣＡＤＡ系统向以ＤＥＣＮＥＴ支持的ＭＩＳ系统的实时数据传送。     

内点方法下线性规划分解算法及其并行计算

内点方法下线性规划分解算法及其并行计算魏紫銮，吴力（中国科学院计算中心）ＡＤＥＣＯＭＰＯＳＩＴＩＯＮＡＬＧＯＲＩＴＨＭＡＮＤＩＴＳＰＡＲＡＬＬＥＬＣＯＭＰＵＴＡＴＩＯＮＦＯＲＬＩＮＥＡＲＰＲＯＧＲＡＭＭＩＮＧＵＮＤＥＲＴＨＥＩＮＴＥＲＩＯＲＰＯＩＮＴ...     

让你的计算机跟初装时一样快

一、保证 ＢＩＯＳ已经完全优化 ＢＩＯＳ设置恰当与否对整部计算机的速度及兼容性的好坏有相当大的影响,在ＢＩＯＳ中对计算机速度影响比较大的有： ①硬盘参数：给定磁盘参数可以减少开机时检测硬盘的时间 ② ＩＮＴＥＲＮＡＬ ＣＡＣＨＥ： ＣＰＵ内部的 ＣＡＣＨＥ是否打开 ③ ＥＸＴＥＲＮＡＬ ＣＡＣＨＥ：主板上的 ＣＡＣＨＥ是否打开 ④ＧＡＴＥ Ａ２０ ＯＰＴＩＯＮ：第２０条地址线速率 ⑤ＤＲＡＭ ＴＩＭＩＮＧ：内存速率 ⑥ＩＤＥ ＨＤＤ ＢＬＯＣＫ ＭＯＤＥ：让硬盘支持块传输 ⑦ＵＤＭＡ或ＰＩＯ ＭＯＤＥ：硬盘传输率 在Ｂ…     

面向多领域的可视化应用开发平台MOVADP

ＭＯＶＡＤＰ是一个面向多领域的可视化应用开发平台，文中主要介绍了该平台的软件结构和实现技术，ＭＯＶＡＤＰ以数据流机制为核心，采用可视编程技术，为用户开发可视化应用提供了一个文凭交互的模块级图形编程环境，与同类平台相比，ＭＯＶＡＤＰ的特点在于，引入了ＩＦＴＨＥＮ－ＥＬＳＥ，ＷＨＩＬＥ－ＬＯＯＰ等控制结构，支持用户构建复杂的可化应用流图；支持“ｌａｚｙｅｖａｌｕａｔｉｏｎ”命令驱动方式下的流图局部运行     

EDMI系统拟实制造软件的研究开发

该文在对ＥＤＭＩ系统ＶＭ问题研究的基础上,提出了以高级语言ＣＶＩ为外壳,以作者开发的优化及无缝连接模块为纽带,将动画仿真软件ＳＩＭＡＮ／ＣＩＮＥＭＡ、ＣＡＤ软件ＰＲＯＴＥＬ和作者开发的ＳＭＴ动画仿真模块集成于一体,构成了ＥＤＭＩ系统数据驱动式的ＶＭ软件,目前已基本完成。     

支持合作过程的工程数据库设计事务模型

设计事务的管理是工程数据库管理系统的关键技术之一。     

Extending Design Environments to Software Architecture Design

Designing a complex software system is a cognitively challenging task; thus, designers need cognitive support to create good designs. Domain-oriented design environments are cooperative problem-solving systems that support designers in complex design tasks. In this paper we present the architecture and facilities of Argo, a domain-oriented design environment for software architecture. Argo's own architecture is motivated by the desire to achieve reuse and extensibility of the design environment. It separates domain-neutral code from domain-oriented code, which is distributed among active design materials as opposed to being centralized in the design environment. Argo's facilities are motivated by the observed cognitive needs of designers. These facilities extend previous work in design environments by enhancing support for reflection-in-action, and adding new support for opportunistic design and comprehension and problem solving.     

CSCW中B/S结构方案的研究与实现

为解决多个设计者之间的数据共享问题,重点讨论了在CAD协同设计中,实施了B/S结构的方案,完成了系统与数据的集成。探讨了如何利用A sp编写W eb脚本,运行脚本程序时使用A ctiveX的方法来工作,给出了其调用方法,并分析了其可重用性的优点。     

Social and psychological aspects of computer-aided design systems

A study was performed among design employees in three large companies to investigate the psychosocial effects of computer-aided design (CAD) work. The study included all technical employees of the departments selected, of whom about two-thirds worked with CAD systems. The results demonstrate that 90% of the CAD users have a positive attitude to CAD-work. No significant differences were found between CAD users and non-CAD users in terms of work load, autonomy, social support, job satisfaction, personal development, or degree of co-operation. Within the group of CAD users, those spending a larger number of weekly working hours with the CAD system reported lower work complexity, lower autonomy of work methods, and less job satisfaction. CAD users with a relatively higher number of years of CAD experience reported a greater work load, fewer CAD difficulties, and lower autonomy of work methods. Among draftspersons and designers, there were no significant differences in work activities between CAD users and non-CAD users.     

Social and psychological aspects of computer-aided design systems

Abstract

A study was performed among design employees in three large companies to investigate the psychosocial effects of computer-aided design (CAD) work. The study included all technical employees of the departments selected, of whom about two-thirds worked with CAD systems. The results demonstrate that 90% of the CAD users have a positive attitude to CAD-work. No significant differences were found between CAD users and non-CAD users in terms of work load, autonomy, social support, job satisfaction, personal development, or degree of co-operation. Within the group of CAD users, those spending a larger number of weekly working hours with the CAD system reported lower work complexity, lower autonomy of work methods, and less job satisfaction. CAD users with a relatively higher number of years of CAD experience reported a greater work load, fewer CAD difficulties, and lower autonomy of work methods. Among draftspersons and designers, there were no significant differences in work activities between CAD users and non-CAD users.     

Cognitive,collaborative, conceptual and creative — Four characteristics of the next generation of knowledge-based CAD systems: A study in biologically inspired design

We envision that the next generation of knowledge-based CAD systems will be characterized by four features: they will be based on cognitive accounts of design, and they will support collaborative design, conceptual design, and creative design. In this paper, we first analyze these four dimensions of CAD. We then report on a study in the design, development and deployment of a knowledge-based CAD system for supporting biologically inspired design that illustrates these four characteristics. This system, called DANE for Design by Analogy to Nature Engine, provides access to functional models of biological systems. Initial results from in situ deployment of DANE in a senior-level interdisciplinary class on biologically inspired design indicates its usefulness in helping designers conceptualize design of complex systems, thus promising enough to motivate continued work on knowledge-based CAD for biologically inspired design. More importantly from our perspective, DANE illustrates how cognitive studies of design can inform the development of CAD systems for collaborative, conceptual, and creative design, help assess their use in practice, and provide new insights into human interaction with knowledge-based CAD systems.     

商业CAD系统中的协作设计

商业CAD系统是一个支持多个设计者并行设计、协作完成同一设计任务的CAD系统.文中提出了基于客户／服务器结构、支持同步和异步设计的协作设计模型.并具体介绍了协作管理中的角色管理、任务管理、群体感知管理和数据管理的实现技术和技巧.     

基于CSCW的CAD系统协作支持技术与支持工具的研究

计算机支持的协同工作（CSCW）给CAD技术带来重大发展，但仍然存在许多问题。其中之一是缺乏将协作性能同应用功能有机结合的方法。文中在分析的现有协作支持技术，工具和系统不足的基础上，提出了用协作支持工具软件CoCADToolAgent改造商品化CAD系统来开发CSCD系统的新思路和总体技术路线，给出了通讯支持，协议，一致性维护和并发控制，协同感知，任务和脚色机制的有效的实现方法，作为本方法的一个应用实例，成功地将传统的人机交互式CAD系统AutoCAD转变为网络环境下支持人人交互的CSCD原型系统，作为专用协作支持工具，CoCADToolAgent比NetMeeting之类的通用协作支持工具具有更好的协作性能，该方法可推广到三维CAD系统。     

Data management issues and trade-offs in CSCW systems

Substantial interest has developed in recent years in building computer systems that support cooperative work among groups without the need for physical proximity. This paper examines some of the difficult data management issues in designing systems for computer-supported cooperative work (CSCW). Specifically, we consider an example CSCW system to support large-scale team science over the Internet: the Collaboratory Builder's Environment. We discuss the issues of managing shared data in such systems, reducing information overload and providing group awareness and access control. We discuss several promising approaches to these issues. We point out where a significant gap remains in addressing the requirements of such systems and where designers have to make design trade-offs that can be difficult to evaluate. Finally, we discuss several open issues for future work     

Software development and integration in a computer supported cooperative work environment

This paper presents a prototype computer supported cooperative work (CSCW) environment that supports the engineering design process. In particular, this environment provides collaborative tools that support computer-aided design (CAD) and computer-aided software engineering (CASE). This paper takes an high level look at the system as a whole and then focuses on the method used to implement the CASE support. It addresses how group members can simultaneously work on coding a program and then integrate their work to form a single program inside this environment. © 1998 John Wiley & Sons, Ltd.