Genetic algorithms for optimal logical database design

The focus of this paper is database design using automated database design tools or more general CASE tools. We present a genetic algorithm for the optimization of (internal) database structures, using a multi-criterion objective function. This function expresses conflicting objectives, reflecting the well-known time/space trade-off. This paper shows how the solution space of the algorithm can be set up in the form of tree structures (forests), and how these are encoded by a simple integer assignation. Genetic operators (database transformations) defined in terms of this encoding behave as if they manipulate tree structures. Some basic experimental results produced by a research prototype are presented.     

开发冲模CAD/CAM系统新模式的研究

基于ＣＡＳＥ（ＣｏｍｐｕｔｅｒＡｉｄｅｄＳｏｆｔｗａｒｅＥｎｇｉｎｅｅｒｉｎｇ）技术原理和冲摸设计与制造过程的特点以及ＣＡＤ／ＣＡＭ技术原理，在文献［２］的研究基础上，提出并研制了一种面向最终用户能多快好省地开发具体冲模ＣＡＤ／ＣＡＭ系统的新模式：冲模ＣＡＤ／ＣＡＭ系统的集成开发平台，论述了平台的总体设计思想，体系结构和工作流程，并给出实现平台的关键技术问题     

一个支持OO协同式设计的CASE工具

这篇文件介绍一个计算机辅助协同面向对象设计系统的设计与实现技术。文中所述的系统全面支持ＯＯＤ辅助设计,它实现了对象式系统中的要素表示及可视化设计,并支持多用户的协同开发。     

基于服务连接和消息连接软件构架的研究

软件构架是解决复杂大型软件开发面临的困难，提高软件质量和软件生产效率的有效方法，是软件复用和基于构件软件工程研究的重要领域，通过对软件构架风格特点的讨论和对构件之间交互方式的分析，论文提出了基于服务连接和消息连接的软件构架风格，开发了一个支持该构架风格的构件生产和组装平台，该构架风格具有以下特点，（1）支持多种可变性机制；（2）构件之间灵活和显式的服务连接和消息连接机制；（3）支持构件合成；（4）构件接口分组，成为端口。     

办公事务对象动态管理和统计分析系统及其应用

“办公事务对象动态管理和统计分析系统”的设计目标是解决一类“办公事务管理对象”的动态管理问题，因此实际上它是一个软件开发的工具。本文阐述了它的设计思想和功能结构，以及如何利用它来开发一个“纪检监察案件动态管理和统计分析系统”。     

在CASE工具中引入XML视图

从数据库设计的角度出发，在CASE(计算机辅助系统工程)工具中添加了创建XML视图的功能，也就是说在使用CASE对实体及其相互联系建模之后，在创建数据库对象的DDL语句的同时自动的创建此数据库的XML视图．具体的方法是将E-R模型转换为DTD来完成了这个数据库的XML视图的创建，一次性的完成了数据库的设计和此数据库的XML视图的创建，从而避免了程序员为了生成视图而对此数据库进行的二次开发，因此提高了工作效率．     

Matter Timed

At best, the ageing of materials is regarded as lending a patina to historic buildings. In reality, however, materials often age disgracefully and unevenly, requiring a high level of maintenance and refurbishment. What if materials could be engineered and integrated into buildings not only to enhance but to heal? Martina Decker , Assistant Professor in the College of Architecture and Design at the New Jersey Institute of Technology (NJIT), looks at pioneering research that is being undertaken into performative, time-dependent materials.     

TYIN tegnestue Architects. Integrating On-Site Education and Practice

Founded by Andreas Grøntvedt Gjertsen and Yashar Hanstad, TYIN tegnestue Architects grew out of an initiative to provide sleeping accommodation for an orphanage in Thailand when the principals were only third-year architecture students. Norwegian architect Lisbet Harboe explains how the student-architects built up a practice while in schools by refocusing their studies and those of their peers on learning through their own experiences of construction.     

国产CODECASE2115小口径管焊接接头性能研究

依据国产CODECASE2115小口径管材的成分和性能,合理选择了焊接材料和焊接工艺,并对焊接接头进行试验与分析,验证了可以获得合格焊接接头的相应的焊接材料和焊接工艺,实现了超超临界锅炉中耐热钢管国产化材料的焊接工艺,扩大了耐热钢管及焊接材料的供货方范围,且国产的CODECASE2115奥氏体钢管与国外同类材料相比,价格与供货期都更有优势,也为这种材料在超超临界机组中的应用积累了试验数据。     

Information modelling in the construction industry: The information engineering approach

Modelling of knowledge in the construction industry is a cumbersome task because of the large amount of data involved and the lack of automated information-modelling tools. Adoption of a method and an automated CASE (Computer-Aided Software Engineering) tool could eliminate many problems encountered in the development of information systems in the construction industry. In particular, this approach may help to assess the information requirements and define strategies for such information systems. The Information Engineering Method (IEM) is introduced to illustrate hoar the conceptual models may be improved by using this method. Additionally Texas Instruments' Information Engineering Facility (IEF?) CASE tool is described to illustrate the advantages of automating such a method. The introduction of conceptual modelling in the construction industry using data and process models should lead to a better structuring of information. This should result in the development of well defined and structured, not ad hoc, applications. This conceptual modelling approach using information engineering is currently being used at the University of Salford to study the potential development of an integrated database (design, procurement and management of construction) for the construction industry. The case study describes the information analysis phase of the procurement process included towards the end of this paper.