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一种用于化工过程异常诊断的实时专家系统 总被引:6,自引:0,他引:6
本文描述了一种用于化工异常诊断专家系统的基于框架的知识表示方法,提出了用于知识表示和知识获取的知识单元和知识实体的概念,以及在此知识表示方法基础上,建造推理机的设计思想,最后还给出了采用以上概念和思想,所构造的用于实际化工过程异常诊断实时专家系统的系统结构与工作流程。 相似文献
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边界表示的数学模型及其应用 总被引:4,自引:0,他引:4
传统的边界表示通常是一种数据结构,缺少一种代数形式来表示几何模型的不同抽象层次和相似性。本文用面边、边点关联矩阵来表示模型边界及其可变性层次,研究了它的同态和相似,并用于特征造型,重点介绍了形状特征的形式化定义。 相似文献
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知识表示在牡丹栽培技术专家系统中的应用 总被引:1,自引:0,他引:1
介绍了协同式专家系统的概念和基于关系的知识表示的原理,详细分析了牡丹栽培技术专家系统中用于知识表示的关系模式,提出了一种协同式专家系统的设计方案。 相似文献
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神经网络问题求解机制 总被引:1,自引:0,他引:1
本文提出了神经网络知识表示的形式化描述语言和知识单元的概念,用于给出传统符号逻辑中的概念,用于给出传统符号逻辑中的概念,属性及它们之间的层次关系如何在神经网络中进行表示,提出了激活强度的度量标准,从而在理论上给出了NN中继承和识别问题的形式化处理方法。在此基础上,提出了NN正向和反向问题求解机制。这里,值得一提的是,本文通过在某一特定领域中对NN推理机制的成功探讨,有力地反驳了人们对于NN模型的一 相似文献
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一个结构良好的规格说明工具:抽象逻辑结构图 总被引:3,自引:3,他引:0
刘建宾 《计算机工程与设计》1996,17(2):32-35
提出了一种新的图形化规格说明工具--抽象逻辑结构图ALSD,给出了它的形式化定义和图形表示方法。抽象逻辑结构图是一种图形和正文相结合的简单树形图式,它可以用于加工逻辑、数据结构、判定树等的描述与表示。 相似文献
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产生式规则表示的C++面向对象描述 总被引:1,自引:0,他引:1
产生式规则知识表示用于面向对象专家系统设计的首要问题是它的面向对象描述,本文重点探讨在C++环境下产生式规则知识表示的面向对象描述方法。 相似文献
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一种用于室内虚拟环境的新表示 总被引:9,自引:0,他引:9
针对室内环境的虚拟问题,提出一种用于描述封闭环境的新表示.该表示由定义在经纬度平面上的光强-距离函数组成,可以支持3个自由度的全景浏览、连续变焦以及任意路线的移动.基于这种表示,给出一个使用少数照片创建室内环境的方法,它结合了基于几何和基于图象的绘制技术,算法快速稳定,对拍摄条件和硬件设备没有苛刻要求. 相似文献
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《Information and Software Technology》2000,42(6):373-381
Software metrics have been used to measure software artifacts statically—measurements are taken after the artifacts are created. In this study, three metrics—System Design Instability (SDI), Class Implementation Instability (CII), and System Implementation Instability (SII)—are used for the purpose of measuring object-oriented (OO) software evolution. The metrics are used to track the evolution of an OO system in an empirical study. We found that once an OO project starts, the metrics can give good indications of project progress, e.g. how mature the design and implementation is. This information can be used to adjust the project plan in real time.We also performed a study of design instability that examines how the implementation of a class can affect its design. This study determines that some aspects of OO design are independent of implementation, while other aspects are dependent on implementation. 相似文献
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Future typographic and graphic designers will need to be able to design for a range of media, both to secure their role and to provide the necessary design expertise in technological environments. This paper proposes an approach to teaching which introduces theoretical issues within a practical design project to encourage the development of general concepts that can be transferred to different technologies. A specific project on designing for the screen is described, which is taught as part of a BA degree in Typography & Graphic Communication. In the context of this project, reasons for introducing theory are proposed, examples of the nature of the theory are given, and the methods used to introduce material are illustrated. A detailed account of one student's implementation of this project is used to demonstrate how theoretical issues can provide direction in a design task. However, careful consideration needs to be given to how theory and practice are integrated to encourage students to look beyond the short-term benefits of specific training to the development of more general knowledge. 相似文献
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This paper describes a pedagogical project that was conducted to design a course on Dedicated Microcomputer Design. Based on the similarities which exist between the design of a course and the structured development of a computer program, an adaptation of some software engineering methodologies was used to design this new course. All the design tasks which were performed to realize this project are presented here in the context of the seven design phases of a Course Life Cycle model. 相似文献
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为解决传统设计模式下手工设计效率低、二维图纸不直观、协同设计难开展及存在信息孤岛的问题,针对生态河湖工程设计阶段涉及的河道堤防、水工建筑物、生态景观及多专业协同,通过 BIM 技术建立更加真实的三维地形模型,进行参数化、联动式河道堤防设计,再建立水工、景观等建筑物 BIM 模型,利用多专业协同技术,对模型进行整合,构建 BIM 技术全流程设计体系。该体系贯穿整个设计阶段,对工程项目进行数字化、可视化表达,构建可实现各参与方协同工作、数据共享的同一数据模型,设计更快速高效,整个工程项目更加直观,可提高项目设计全流程精细化管理水平,显著提升工程生产效率、质量和社会经济效益。 相似文献
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在项目管理中,项目客户关系管理是实现项目成功实施的重要环节。本文以交通项目为背景,把面向对象建模技术应用在其项目客户关系管理系统的建模设计过程中,使用可视化的统一建模语言UML对该系统进行了详细的分析和设计。 相似文献
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This paper describes classroom experience with the shape optimization of a lap joint. The project stressed the combination of optimization based on analytical models and experimental improvement of the design obtained based on analysis. Students used a variety of tools for optimizing the designs, ranging from exhaustive evaluation via spread sheet programs to formal optimization. The project shows promise for introducing students to all aspects of design optimization. Improvements in the basic project are suggested on the basis of classroom experience. 相似文献
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Jonathan Bowen 《Microprocessors and Microsystems》1985,9(1):8-14
Hardware and software are often designed separately and in parallel to speed up the design stage. A microprocessor-based project is described which demonstrates some examples of the possible pitfalls during the integration of these two components. Participants in the project are also introduced to the advanced development equipment which should be used for this purpose. The experiences of a group of postgraduate students who initially undertook the project are described. 相似文献
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S. Shaw 《Journal of Computer Assisted Learning》1993,9(2):93-99
Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained. 相似文献