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1.
给出了设计嵌套触发器的一个实例,并详细介绍了如何设计一个嵌套触发器的过程及设计中应注意的一些要点。  相似文献   

2.
电子系统设计自动化方法和设计环境的研究   总被引:1,自引:0,他引:1  
当今电子系统设计环境采用自上向下的设计方法,在设计周期、系统性能和成本三者之间取得了更好的设计权衡。本文在吸取现有设计方法的基础上,提出了一个新的设计流程,建立了一个新的设计环境ASEDA。  相似文献   

3.
自80年代末,处理阵列的研究的一个新方向是设计线性阵列。在这方面,Lee和Kedem作出开创性的工作,他们提出了一个线性阵列设计框架,但是,目前还没有一个有效的设计方法。在文中,提出了一个线性阵列的设计方法,基于它,线性阵列的设计者通过分析算法对应的数据依赖图的最长路径,就可以获得可行的设计。  相似文献   

4.
装饰在设计中起着重要的作用。如果说,设计用两种语言说话的话,设计中的实用性功能是设计天秤上的一个砝码,而装饰就是设计天秤上的另一个砝码,它起着美化设计,甚至美化生活的作用。装饰之所以在设计中长盛不衰,一是因为其功能,二是因为它独立的成系统的语汇。  相似文献   

5.
ET2009是一个表格设计软件,其内置的函数具有强大的运算功能,利用函数设计万年历非常方便、快捷。本篇教导大家利用在最短的时间内设计一个强大的万年历。  相似文献   

6.
图案的协同设计是计算机支持的协同工作的一个典型应用 ,针对纺织商标图案设计的要求 ,给出了一个基于 Web的协同商标图案设计系统的体系结构 ,重点阐述了在同步设计环境中基于事件驱动机制的多用户同步设计思想 ,并提出了一个基于动态的最高优先级策略来控制系统的并发  相似文献   

7.
本文介绍了使用PowerBuilder开发数据库应用程序时数据窗口字段保护的设计,包括一个窗体及一个数据窗口控件,给出了一个具有使用价值的通用模块的设计实例。  相似文献   

8.
在当今这个物质过剩的时代,如何使所设计的产品在琳琅满目的商品中吸引消费者的眼球是设计师面临的一个难题。而产品设计中的设计说服策略是商品从众多同质化的产品中脱颖而出的一个重要设计手段。文章主要在探索设计说服重要意义的基础上,尝试提出设计说服的设计策略的应用方法。  相似文献   

9.
嵌入式工业控制系统的Flash文件存储系统   总被引:4,自引:0,他引:4  
鲍国彬 《福建电脑》2006,(2):130-131
本文根据工业控制系统的要求,并针对Nand型Flash存储器的特点,设计了一个适合嵌入式系统需要的文件系统。本文件系统利用了原有的FAT文件系统,设计一个Flash存储器IO接口设计与之相组合,组成一个完整的文件系统。设计时遵循文件系统的规范,制定了统一的接口和标准的API函数,具有良好的可移植性和兼容性。  相似文献   

10.
信息安全SOPC硬件平台的架构设计   总被引:1,自引:0,他引:1  
平台化设计已经成为国际上渐趋流行的设计理念,SOPC给用户提供了一个最为灵活的设计平台。本文针对SOPC的特点进行信息安全平台设计,分析了信息安全平台的需求,总结其设计应遵循的原则;在此基础上提出一个信息安全SOPC硬件平台架构模型,并专门针对NiosII进行了详细设计。最后针对平台设计中的MCU、总线设计等关键问题提出了相应的解决方案。  相似文献   

11.
基于功能面的产品布局与人机工程协同设计的研究   总被引:1,自引:0,他引:1       下载免费PDF全文
在产品概念设计中,布局设计和人机工程设计是两个相互影响和制约的设计过程,。为了将这种布局设计和人机工程设计协同起来,将功能面作为概念设计发解的依据,并在此基础上提出了基于功能面的协同概念设计过程和方法,以及布局设施 人机工程协同设计模型和形式化描述方法,最后结合摩托车的概念设计实例给出了一个计算机支持的布局和人机工程协同设计系统的实现方案。  相似文献   

12.
低碳经济时代下,工业设计应该如何应对新的挑战呢?文章从哲学的角度出发,分析了设计的秩序和自由的博弈,寻求设计秩序理念和设计自由思想之间的一种平衡,从而重点阐述设计秩序观的理论,以此来协调现代设计观。作为一种新的设计思维方法,设计秩序观的提出具有重大的积极意义。设计秩序引导设计自由,设计自由激活设计秩序。秩序观是人类的既定要求,也是工业设计发展的最高层次。  相似文献   

13.
研究设计的发展规律对于我们更好地认清设计的发展方向具有重要作用。本文以产品本身为对象,通过分析设计史,探究设计的发展规律。结果发现,工业设计的发展过程具有功能性与情感化设计交替上升的特点。结合这一规律的背景因素,得出了一些有关设计趋势的结论:在两者的同步行进时期,设计往往处于平稳发展阶段,发展的形式主要表现为小规模的量变;每当有一方异军突起时,设计往往处于迅猛发展阶段,容易发生推动性的质变。  相似文献   

14.
在设计实践中,我们如何去发挥设计批评的作用,从而不断规范、引导和促进中国的设计实践活动,关键是要发挥设计批评的批判精神。本文对当下出现的商业主义设计、技术主义设计、形式主义设计和西方垄断式设计话语等等问题,进行了一番理性的分析、批评与判断;通过这些设计现象的揭示,以期把握中国当代设计健康的发展方向。  相似文献   

15.
在现代工业产品设计中,设计创意与创新设计对产品设计的成功起着举足轻重的作用,设计师的创意与创新设计能使其设计的工业产品给大众留有深刻的印象,因为新奇能给予人很深的印象,此论文谈及了设计的表现基础,同时对一些名师的设计进行了分析,使大家更加了解到工业设计中的创意与创新对工业产品的作用,希望通过此论文的学习,使大家能更多的了解创意与创新设计,并能在以后的设计中突发其想,做出更多优秀新奇的工业产品设计。  相似文献   

16.
Constraint-based functional design verification for conceptual design   总被引:12,自引:0,他引:12  
In the early stages of mechanical product design, designers not only need to determine the physical structure of the design, but also need to verify that the design functions properly with the allowable values or ranges of values of the relevant design attributes. Existing work on design verification is either aimed at specific design problems, which are generally carried out at the downstream design stages, or aimed at deriving design behavior using a behavioral simulation approach. Functional design verification has largely been neglected by the research society. To tackle this problem, we propose a generic constraint-based approach that is based on a comprehensive functional design model. A number of strategies are proposed for the approach, including strategies for design variables reduction, variable dependency graph development, constraint propagation, and dynamic verification of a design over an assigned set of attributes (variables). The approach is implemented as part of a functional modeling design environment. A simple design verification case is presented to illustrate our approach.  相似文献   

17.
Design is a balancing act between people’s competing concerns, design options and design performance. Recently collecting data on such concerns such as sustainability or aesthetics has become possible through online crowdsourcing, particularly in 3d. However, such systems rarely present more than a single design alternative or allow users to change the design and seldom provide quantitative design analysis to gauge design performance. This precludes a more participatory approach including a wider audience and their insight in the design process.To improve the design process we propose a system to assist the design team in exploring the balance of concerns, design options and their performance. We augment a 3d visualisation crowdsourcing environment with quantitative on-demand assessment of design variants run in the cloud. This enables crowdsourced exploration of the design space and its performance. Automated participant tracking and explicit submitted feedback on design options are collated and presented to aid the design team in balancing the demands of urban master planning. We report application of this system to an urban masterplan with Arup.  相似文献   

18.
This paper presents a case-based parametric design system for test turntable. The aim of this system is to realize automatic and intelligent design of turntable. Utilizing the parametric design method, a knowledge-base composed of parameterized 3D product models is first constructed. All the corresponding design specifications or parameters are then saved in a data-base. Taking advantages of the CBR methodology, a most similar case can be easily retrieved from the pre-built design knowledge-base and case-base when a new design task comes. Only with a few revisions, the modified design can mostly satisfy the new design requirements to fulfill a new design and can be further saved as a new case into the database. The design system is built as a module embedded in Pro/ENGINNER 3.0. It contains a turntable case-base, a design knowledge-base, a CAD software and a graphic user interface. Now this system is on a trial operation in a ship institute, the result shows that it can enhance the design efficiency and reduce the design time and cost.  相似文献   

19.
An emerging model in concurrent product design and manufacturing is the federation of workgroups across traditional functional ‘silos’. Along with the benefits of this concurrency comes the complexity of sharing and accessing design information. The primary challenge in sharing design information across functional workgroups lies in reducing the complex expressions of associations between design elements. Collaborative design systems have addressed this problem from the perspective of formalizing a shared ontology or product model. We share the perspective that the design model and ontology are an expression of the ‘meaning’ of the design and provide a means by which information sharing in design may be achieved. However, in many design cases, formalizing an ontology before the design begins, establishing the knowledge sharing agreements or mapping out the design hierarchy is potentially more expensive than the design itself. This paper introduces a technique for inducing a representation of the design based upon the syntactic patterns contained in the corpus of design documents. The association between the design and the representation for the design is captured by basing the representation on terminological patterns at the design text. In the first stage, we create a ‘dictionary’ of noun-phrases found in the text corpus based upon a measurement of the content carrying power of the phrase. In the second stage, we cluster the words to discover inter-term dependencies and build a Bayesian belief network which describes a conceptual hierarchy specific to the domain of the design. We integrate the design document learning system with an agent-based collaborative design system for fetching design information based on our ‘smart drawings’ paradigm.  相似文献   

20.
Design, design research, and design science have received increasing attention lately. This has led to a more scientific focus on design that then has made it timely to reconsider our definitions of the design theory concept. Many scholars in Information Systems assume a design theory requires a complex and elaborate structure. While this structure has appeal for its completeness and complexity, it has led scholars to criticize simplicity and elegance in design science theories that fail to demonstrate the “required” elements. Such criticisms lead to questions about whether design theory can be considered theory at all. Based on a study of notable design writing in architecture, finance, management, cognitive psychology, computer science as well as information systems and the philosophy of science, the authors demonstrate that design theory consists of two parts: a design practice theory and an explanatory design theory. An explanatory design theory provides a functional explanation as to why a solution has certain components in terms of the requirements stated in the design. For explanatory design theory, only two elements are essentially necessary for a complete design theory: requirements and solution components. The argument is logical as well as empirical; the authors give examples of design theory drawing from IS as well as other design-related fields show how design theory can be both simple and complete. The paper concludes with a proposal for explanatory design theory.  相似文献   

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