飞机试验实时监控系统数据库的设计与实现

利用成熟的数据库系统,给出了用于飞机试验监控系统设计的数据库主要指标,并设计了数据库的硬件拓扑结构和逻辑设计结构.在具体实行过程中,设计并完成了数据库的完整性约束,实现了数据库的安全管理、数据管理等一系列措施,保证了数据库的安全和准确,为飞机试验的顺利进行提供了工具,为设计类似系统数据库提供了参考.     

基于JSP技术的网络考试系统数据库的设计

以考试系统数据库的设计为例，阐述了规范化数据库设计的步骤和方法，并对考试系统数据库进行了分析，给出了基于JSP技术的网络考试系统的实现方案。     

数据库销毁系统的设计与实现

设计并实现了一种数据库销毁系统,该系统设计了一种数据库覆写方法,并基于该方法实现了数据库本地自毁功能和远程销毁功能.当数据库服务器处于"失控"状态时,为了防止数据库为他人所用,用户可以使用该系统销毁数据库.利用数据库自毁功能,用户可以随时对数据库进行销毁,利用数据库远程销毁功能,用户可以随地对数据库进行销毁.该系统销毁后的数据信息具有不可恢复性,是一种安全可靠的数据库销毁系统.     

公交线路查询系统的数据库设计

本文以公交线路查询系统为例。对数据库设计进行了研究。从不同角度考虑,设计出不同结构的数据库．可以看出数据库结构设计对数据处理操作的影响。本系统使用Visual Foxfro6作为开发工具,通过数据库表的逐步设计,实现了预定功能。     

基于Flash Builder4.0＋ MyEclipse8.5的新病案首页系统设计与实现

采用Flash Builder4.0、MyEclipse8.5为开发工具,Oracle 10g为数据库,开发了新病案首页系统,详细阐述了系统的设计流程、功能分析和数据库设计与实现。     

基于MySQL数据库的在线选课系统

文章探讨了基于MySQL数据库的在线选课系统的设计。通过分析基于MySQL数据库的在线选课系统的实际需求,阐述了系统的设计思想。在探讨选课系统总体设计的基础上,对数据库的设计原则进行了深入分析,指出了规范数据库、规范命名的原则,对数据库设计的重要考虑因素做了概括。对基本的数据表的构成进行了列举。最后,通过实例展示了选课系统中对数据库操作。     

农作物智能数据库设计系统的研究

数据库是计算机智能决策支持系统的核心。文章介绍了智能数据库设计系统的结构,并以农作物中的水稻作物数据库为例,提出了具体的设计方法,分析了智能数据库管理的功能。     

Power Designer在数据库设计中的应用

介绍了Power Designer工具的数据库建模流程。以网上商品销售系统的数据库设计为例,论述了Power Designera在数据库设计中的具体应用,从而使学生区分理论中各设计阶段的任务和关系,提高了数据库设计动手与实践能力。     

数据库技术在带钢质量分析系统中的应用

针对传统带钢出口参数笔录仪在维护和使用方面的缺陷,研究如何利用数据库技术来管理数据;并以数据库设计理论为指导,以宝钢热轧带钢质量分析系统为应用背景,设计开发了一个数据库应用系统,并成功取代了笔录仪。     

大型数据库应用系统中的数据库性能优化方法

数据库的性能优化直接影响到整个数据库应用系统的有效运行,从系统的应用开发、数据库设计、数据库服务器调整、运行环境等各个方面出发,以SybaseASE数据库服务器为例阐述了数据库性能优化的方法。     

异步电路的计算机辅助设计软件

异步电路由于没有时钟频率的限制,所以较同步电路有很多优点,其研究也越来越广泛,是未来解决计算机CPU设计的一种重要方案。异步电路的计算机辅助设计软件代表了异步电路当前研究的前沿,通过研究这些软件可以对异步电路的模型有更为深入的认识。论文整理列举了有关异步电路的63种软件工具,并将其分为设计、仿真、相关设计工具、前端设计、综合和验证6个方面。最后,在这些软件中选取两种设计软件对一个简单的例子进行了设计实现,以体现异步电路的设计特点。     

Enhancing general-purpose tools with multi-state previewing capabilities

General-purpose design tools can be applied to a wide variety of design problems, but the large number of unique states they are able to produce makes it difficult to find results most relevant to a specific design problem. Current interfaces exacerbate this problem by offering only a single preview of one potential future state. We introduce multi-state previewing tools to facilitate the process of generating, displaying, navigating, and evaluating multiple, potential future states simultaneously. Multi-state previewing tools specifically encode and automate higher-level design practices, such as exploring multiple alternatives, better aligning computer-based tools with design. In this paper, we synthesize a framework for this class of tools by combining and generalizing existing instantiations, then show how this framework can be used to guide the design, implementation, and further research of these tools.     

Technology tools to support learning design: Implications derived from an investigation of university teachers' design practices

The need to improve the quality of higher education has fostered an interest in technology tools to support effective design for teaching and learning. Over the past decade this interest has led to the development of tools to support the creation of online learning experiences, specifications to underpin design systems, and repositories to share examples. Despite this significant activity, there remain unanswered questions about what shapes university teachers' design decisions and how tools can best support their design processes. This paper presents findings from a study of university teachers' design practices that identified teachers' perceptions of student characteristics, their own beliefs and experiences, and contextual factors as key influences on design decisions. The findings extend our understanding of activities fundamental to higher education teaching and inform thinking about design support tools.     

Experiences developing architectures for realizing thin‐client diagram editing tools

Diagram‐centric applications such as software design tools, project planning tools and business process modelling tools are usually ‘thick‐client’ applications running as stand‐alone desktop applications. There are several advantages to providing such design tools as Web‐based or even PDA‐ and mobile‐phone‐based applications. These include ease of access and upgrade, provision of collaborative work support and Web‐based integration with other applications. However, building such thin‐client diagram editing tools is very challenging. We have developed several thin‐client diagram editing applications realized as a set of plug‐in extensions to a meta‐tool for visual design environment development. In this paper, we discuss key user interaction and software architecture issues, illustrate examples of interacting with our thin‐client diagram editing tools, describe our design and implementation approaches, and present the results of several different evaluations of the resultant applications. Our experiences will be useful for those interested in developing their own thin‐client diagram editing architectures and applications. Copyright © 2007 John Wiley & Sons, Ltd.     

The shared expertise model for teaching interactive design assistants

The growing complexity of contemporary engineering designs requires the use of sophisticated computer-based design tools. Such tools increase productivity in drafting, configuration and calculations. However, the current generation of design tools plays a rather passive role in the entire design process. Recent progress in knowledge-based engineering design, machine learning and knowledge acquisition allows the development of knowledge-based design assistants which could behave as active partners to human designers, rather than as passive graphical or computational tools. This paper presents the shared expertise model (SEM) of interaction between a human designer and a knowledge-based design assistant, in which the design assistant behaves as an apprentice and a collaborator in the design process. The human designer and his computer-based assistant create designs together, with the assistant proposing routine or even innovative designs, and the human designer correcting and finalizing these design, as well as specifying creative designs. In this process, the assistant also learns from the human designer, constantly extending and improving its knowledge base, and becoming a better design assistant. This is achieved by employing apprenticeship multistrategy learning based on a plausible version space representation. Within the SEM framework, a human designer with limited programming capabilities can directly develop and maintain a personalized knowledge-based design assistant. The use of SEM leads to increased capabilities of the expert-assistant design team. In this paper, some of the main features of the SEM model, as well as its implementation with the Disciple toolkit, are illustrated within the domain of computer workstation configuration.     

A formal approach to managing design processes

To capture market opportunities, competition within the microelectronics industry demands ever-faster product development, which means ever-shorter design cycles. Shorter design cycles can be achieved by carefully managing the design process during rapid prototyping. Careful management is important because the design process must be (1) adjusted to accommodate constraints such as product performance and design time, and (2) frequently updated to take advantage of new design tools and methodologies. Traditionally, designers have used whatever tools seemed convenient to them at the time, which has made it virtually impossible to determine what methodology was used to produce a given design. These problems can be avoided through design methodology management, which ensures that appropriate tools are selected and executed in the appropriate sequence. Effective design management requires an environment equipped with a formal representation of supported design processes and tools, and an execution environment that helps designers select and execute an appropriate design process. We propose a methodology management system that provides this functionality     

Productivity Through Automation

Productivity improvements in systems development can be made through the adoption of computer-aided software engineering (CASE), data design, and prototyping tools. How much these tools contribute to increased productivity in systems design, however, relies mostly on careful evaluation and selection of these tools as well as an evaluation of their impact on the designer or analyst who will be using the tool and on the development methodology itself.     

集成印制电路板设计系统IPBDS

本文描述一个在微型计算机上实现的集成印制电路板设计系统IPBDS.在IPBDS的研制过程中,采用了支持分层设计的并行系统结构,将各种用于设计输入、设计检验和布图设计等CAD工具集中由一个设计数据库进行统一的组织和管理,实现了电路设计的一次性输入存储,供多个CAD工具共同使用,避免了各工具间复杂和重复的数据转换,减少了存储的冗余,保证了数据的一致性和设计的完整性,为印制电路板设计提供了一个集成和有效的环境.     

The ultimate design tool

The author design tools from a tool user's point of view. The author considers the creative process and where design tools fit into that process. He considers pencil and paper as a tool and argues that they are better than computers as an ideation tool     

A co-modelling method for solving incompatibilities during co-design of mechatronic devices

The design process of mechatronic devices, which involves experts from different disciplines working together, has limited time and resource constraints. These experts normally have their own domain-specific designing methods and tools, which can lead to incompatibilities when one needs to work together using these those methods and tools. Having a proper framework which integrates different design tools is of interest, as such a framework can prevent incompatibilities between parts during the design process. In this paper, we propose our co-modelling methodology and co-simulation tools integration framework, which helps to maintain the domain specific properties of the model components during the co-design process of various mechatronic devices. To avoid expensive rework later in the design phase and even possible system failure, fault modelling and a layered structure with fault-tolerance mechanisms for the controller software are introduced. In the end, a practical mechatronic device is discussed to illustrate the methods and tools which are presented in this paper in details.