CAD智能工程数据库集成系统

从设计过程入手,通过对共性工程数据及其关系的讨论,基于C/S结构的分布式计算,引入知识工程,建立知识库,应用推理机制,提出了一种CAD技术集成方案和系统实现原型,通过开发方便的操作工具,使得共性工程数据库中的数据的使用和管理具有智能化,方便设计人员使用和提高设计效率。     

基于XML的工程数据表达方法研究

随着企业信息化应用的不断深入,工程数据的存储和显示,特别是图形和文字混合的工程数据的存储和显示,仅靠转义字符的表达形式已无法满足现有的应用需求。提出了一种基于XML的工程语义表达模型,并给出了该表达模型的实现框架,它不仅能表达各种自定义的图形工程数据,而且能与其他文本信息统一集成,给工程数据的显示以及工程语义的提取带来了方便。该表达模型在CAD和CAPP中得到了应用,取得了良好的效果。     

基于XML的工程数据表达方法研究

随着企业信息化应用的不断深入,工程数据的存储和显示,特别是图形和文字混合的工程数据的存储和显示,仅靠转义字符的表达形式已无法满足现有的应用需求。提出了一种基于XML的工程语义表达模型,并给出了该表达模型的实现框架,它不仅能表达各种自定义的图形工程数据,而且能与其他文本信息统一集成,给工程数据的显示以及工程语义的提取带来了方便。该表达模型在CAD和CAPP中得到了应用,取得了良好的效果。     

Delphi平台下工程装备修理机构修理能力评估系统设计与实现

为了方便工程装备修理机构修理能力的评估工作,基于Delphi7.0平台及Access数据库,构建了工程装备修理机构修理能力评估系统,实现了数据计算及数据管理等功能.     

应用型工程数据库系统中性能优化技术研究

该文分析了应用型工程数据库应用领域及其特点,指出通过数据预处理、合理使用范式规则设计表结构等来优化工程数据库数据表。同时提出了索引和查询语句优化选择、事务执行转向服务器端进行数据操作等手段优化数据库性能。     

工程数据管理系统中的工程图档检索

工程数据管理系统 (EDMS) ,已在越来越多的现代企业中被推广应用。它使企业中的传统纸质工程图档及相关信息被数字化了的电子图档所替代。真正实现了企业内部的工程技术图档无纸化计算机管理。而工程图档的电子检索在整个EDMS中是一项十分重要的功能。它使被授权用户能通过网络从系统的共享数据库中快速、方便、灵活、安全地获得有用的信息。     

仿真工程管理系统研究

仿真系统中存在不同的应用目的,涉及多种仿真想定、模型、数据、评估等内容,在多用户情况下仿真资源缺乏统一的管理,会严重影响了仿真系统的使用效率;为了提升仿真系统的使用效率,文章提出一种仿真工程管理的方法,利用共享内存实时采集MOM数据实现对邦员负载信息的有效监控;通过服务器统一收集XML格式仿真联邦运行数据和监控日志实现仿真运行回放;通过构建通用模型接口和评价体系实现了基于Web的仿真评估;基于B/S架构构建了仿真工程管理系统,可将模型和数据以仿真工程为单位进行统一管理,实现了对仿真运行的统一监控、数据的统一的收集与管理、评估模型管理和基于仿真试验数据的仿真评估,从而提高仿真系统的使用效率,减少仿真应用系统的集成工作量。     

机器翻译中介词的处理策略

本文扼要地讨论了介词的特点, 简述了它在语言工程中的处理方法, 并提出了按不同的共性与个性、采取分层分级处理的策略。文章着重对介词的共性与个性和分层分级处理的基本思想和内容作了论述。     

岩土工程勘察平面图（数据采集）绘制软件ZRJPMT简介

本文介绍了平面图绘制软件ZRJPMT的使用方法，提出了通过扫描的图纸，利用此软件进行平面图地物数据和勘探点数据自动采集的方法，以提高平面图绘制的速度和质量，促进岩土工程勘察内业整理的质量和效率。本软件很好地解决了当前普遍存在的岩土工程平面图绘制中的难点问题。     

基金会现场总线功能块原理及应用第二讲基金会现场总线功能块基本知识(下)

1 量程标定参数 现场总线控制系统从输入设备得到测量数据经过运算后由输出设备执行,其中有些环节使用工程单位比较方便,但有些环节使用百分数比较方便。基金会制定的标定参数决定了变量的量程范围、工程单位及小数点右边显示几位。例如浮点数标定参数有DS-68的数据结构(见表1     

Development of technology for customer requirement-based reference design retrieval

Engineering design is a knowledge-intensive process, and includes conceptual design, detailed design, engineering analysis, assembly design, process design, and performance evaluation. Each task involves various aspects of knowledge and experience. Whether this knowledge and experience can be effectively shared is key to increasing product development capability and quality, and also to reducing the duration and cost of the development cycle. Therefore, offering engineering designers various query methods for retrieving engineering knowledge is one of the most important tasks in engineering knowledge management.The study develops a technology for customer requirement-based reference design retrieval to provide engineering designers with easy access to relevant design and associated knowledge. The tasks involved in this research include (i) designing a customer requirement-based reference design retrieval process, (ii) developing techniques related to the technology for customer requirement-based reference design retrieval, and (iii) implementing a customer requirement-based reference design retrieval mechanism. The retrieval process comprises the steps of customer requirement-based query, case searching and matching, and case ranking. The technology involves (1) a structured query model for customer requirement, (2) an index structure for historical design cases, (3) customer requirement-based case searching and matching mechanisms, (4) a customer requirement-based case ranking mechanism, and (5) a case-based representation of designed entities.     

On technology for functional requirement-based reference design retrieval in engineering knowledge management

Engineering design is a knowledge-intensive process, and includes conceptual design, detailed design, engineering analysis, assembly design, process design, and performance evaluation. Each of these tasks involves various aspects of technical knowledge and experience. Whether this technical knowledge and experience can be effectively shared is key to increasing product development capability and quality, and also to reducing the duration and cost of the development cycle. Consequently, providing engineering designers various query methods for retrieving engineering knowledge is one of the most important tasks in engineering knowledge management.The study develops a technology for functional requirement-based reference design retrieval as a decision support mechanism, which can assist engineering designers to retrieve relevant design and associated knowledge for reference in conducting functional requirements of a product. This study involves the following tasks: (i) designing a functional requirement-based reference design retrieval process, (ii) developing techniques related to the technology for functional requirement-based reference design retrieval, and (iii) implementing a functional requirement-based reference design retrieval mechanism. The retrieval process includes the steps of functional requirement-based query, case searching and matching, and case ranking. The technology involves (i) a structured query model for functional requirements, (ii) an index structures for historical design cases, (iii) functional requirement-based case searching and matching mechanisms, (iv) a functional requirement-based case ranking mechanism, and (v) a case-based representation of designed entities. Finally, the experimental example with indexing and retrieving similar designed entities is conducted to demonstrate the proposed techniques worked efficiently.     

A RFBSE model for capturing engineers’ useful knowledge and experience during the design process

Reuse of designers’ knowledge and experience of solving problems during the engineering design process holds the key to increase efficiency of decision making in future projects. An important part of this useful knowledge and experience is the interpretation of data and information about design objects and processes as well as the generation of new information for decision-making. However, previous studies on knowledge representation models have mainly focused on developing a structure to describe the knowledge about design objects and design processes while a systematic method that can effectively integrate knowledge about design objects and knowledge about problem-solving strategies is still missing. To fill this gap, a RFBSE knowledge representation model for capturing useful design knowledge and experience for future reuse is developed and evaluated in this study. This paper describes the key elements of this model, explains the rationale of using particular elements, and discusses the evaluation of the model using an engineering design example.     

Integrating ergonomics into engineering design: The role of objects

The objective of this study was to explore the role of objects in integrating ergonomic knowledge in engineering design processes. An engineering design case was analyzed using the theoretical concepts of boundary objects and intermediary objects: Boundary objects facilitate collaboration between different knowledge domains, while the aim of an intermediary object is to circulate knowledge and thus produce a distant effect. Adjustable layout drawings served as boundary objects and had a positive impact on the dialog between an ergonomist and designers. An ergonomic guideline document was identified as an intermediary object. However, when the ergonomic guidelines were circulated in the design process, only some of the guidelines were transferred to the design of the sterile processing plant. Based on these findings, recommendations for working with objects in design processes are included.     

Developing a multi-layer reference design retrieval technology for knowledge management in engineering design

Engineering design is a knowledge-intensive process that encompasses conceptual design, detailed design, engineering analysis, assembly design, process design, and performance evaluation. Each of these tasks involves various areas of knowledge and experience. The sharing of such knowledge and experience is critical to increasing the capacity for developing products and to increasing their quality. It is also critical to reducing the duration and cost of the development cycle. Accordingly, offering engineering designers various methods for retrieving engineering knowledge is one of the most important tasks in managing engineering knowledge.

This study develops a multi-layer reference design retrieval technology for engineering knowledge management to provide engineering designers with easy access to relevant design and related knowledge. The tasks performed in this research include (i) designing a multi-layer reference design retrieval process, (ii) developing techniques associated with multi-layer reference design retrieval technology, and (iii) implementing a multi-layer reference design retrieval mechanism. The retrieval process contains three main phases—‘customer requirement-based reference design retrieval’, ‘functional requirement-based reference design retrieval’ and ‘functional feature-based reference design retrieval’. This technology involves (1) customer requirement-based reference design retrieval, which involves a structured query model for customer requirements, a case-based representation of designed entities, a customer requirement-based index structure for historical design cases, and customer requirement-based case searching, matching and ranking mechanisms, (2) functional requirement-based reference design retrieval, which includes a structured query model for functional requirements, a functional requirement-based index structure for historical design cases, and functional requirement-based case searching, matching and ranking mechanisms, and (3) functional feature-based reference design retrieval, which is a binary code-based representation for functional features, an ART1 neural network for functional feature-based case clustering and functional feature-based case ranking.     

Engineering aesthetics and aesthetic ergonomics: Theoretical foundations and a dual-process research methodology

Although industrial and product designers are keenly aware of the importance of design aesthetics, they make aesthetic design decisions largely on the basis of their intuitive judgments and ‘educated guesses’. Whilst ergonomics and human factors researchers have made great contributions to the safety, productivity, ease-of-use, and comfort of human-machine-environment systems, aesthetics is largely ignored as a topic of systematic scientific research in human factors and ergonomics. This article discusses the need for incorporating the aesthetics dimension in ergonomics and proposes the establishment of a new scientific and engineering discipline that we can call ‘engineering aesthetics’. This discipline addresses two major questions: How do we use engineering and scientific methods to study aesthetics concepts in general and design aesthetics in particular? How do we incorporate engineering and scientific methods in the aesthetic design and evaluation process? This article identifies two special features that distinguish aesthetic appraisal of products and system designs from aesthetic appreciation of art, and lays out a theoretical foundation as well as a dual-process research methodology for ‘engineering aesthetics’. Sample applications of this methodology are also described.     

基于计算机虚拟技术的工程机械的综合设计

在工程机械设计中,“构形设计”是完成结构形态学分析与设计的重要环节,它需要设计人员充分发挥空间思维和形体想象能力;而“功能设计”是完成功能组合学思考与决策的关键步骤,它需要设计人员充分发挥技术协调和功能组合能力,两者的有机结合便构成了工程机械的综合设计。运用计算机虚拟造型、虚拟控制和虚拟运行技术将工程机械装置综合设计的概念予以实现,是工程机械设计思路与设计方法上的创新。     

工程数据库中的数据组织

本文在讨论工程数据结构特点的基础上，针对工程设计和工程信息管理系统，提出了一种在工程数据库中存储中描述工程数据的方法，并对常用的工程图形信息，设计原型和铁路确报信息等结构进行了论述和实践。     

基于工作流管理的智能CAD集成系统

介绍了工作流管理的现状和产品数据管理技术，比较了知识处理与数据处理的特点，提出了一种以工作充为核心的智能PDM系统集成解决方案，通过在PDM系统中集成人工智能，使用STEP标准建立信息模型和数据交换，增强系统在信息和应用集成的过程中的适应性和开放性，提供基于Internet/Intranet的共享零件库和标准工程手册数据库，将工程设计和管理人员解放出来，可提高产品设计和资源利用率。