基于MFC的Pro/E标准件库的研究与开发

三维标准零件库的建立对提高企业的设计效率和质量具有重要的意义。通过对标准件库的自动检索和参数化仿真设计,生成设计人员所希望的三维模型。该文分析了对三维辅助设计软件Pro／E进行二次开发的各种方案,着重研究了基于MFC的Pro／TOOLKIT开发技术,探讨并解决了MFC应用程序集成、数据库建立、ODBC数据库访问技术、参数化仿真设计技术以及Pro／E菜单定制等关键问题。开发实例给出了用可视化编程语言VC＋＋进行二次开发,设计并实现了一个实用的Pro／E三维标准零件库系统。     

利用组件技术开发三维标准件库

针对国内大多数三维标准件库存在的CAD／CAM平台依附性强的缺陷，以COM技术为基础，采用Windows DNA结构，将不同平台标准件库中的重复部分提取出来，以核心组件群的方式表示，并在这个组件群的基础上提出一个面向多个三维造型平台的标准件库系统的解决方案。     

基于特征的三维参数化标准件库建库技术

以Pro/ENGINEERCAD/CAM系统为背景,研究了基于特征的标准件库的结构、功能及数据描述方法,在分析、消化Feature-BasedModeling模块的基础上,提出了一种基于特征的三维参数化标准件建库方法及系统实现的关键技术。     

满足装配建模的标准件库的设计与实现

在装配建模过程中 ,三维标准零件是构成产品模型整体的一个不可缺少的部分 ,本文深入分析了面向装配的标准件库的信息结构 ,提出和实现了满足装配建模的一种标准件建库方法和建库工具 ,系统具有友好的用户界面和方便的标准件装配操作。     

基于Pro/Engineer的注塑模标准零件库的开发

论述利用Visual C 的集成开发环境(IDE)和Pro／Toolkit开发模块开发注塑模标准件库的具体过程，对创建基于Pro／Engineer的实用CAD软件系统进行了积极有效的探索。     

在汽车铸锻模中的应用

近年来，汽车市场竞争日趋激烈，人们对汽车的性能、内在质量、外观造型不断地提出更高的要求，从而加速了汽车的更新换代。为了适应当前技术革命迅速发展的形势，增强产品的开发能力，进一步提高企业的技术水平，完善我厂的模具CAD／CAM系统，我厂在成功应用EUCLID软件的基础上，引进了第三代CAD／CAM软件Pro／ENGINEER．14（Pro／E）。Pro／E作为我厂模具CAD／CAM的主要支撑软件之一，经过一段时间应用，已开始在模具开发中发挥效益。实践证明，该软件确实为性能卓越的模具CAD／CAM软件。1．Pro／E建模Pro／E是以参数…     

基于细胞元本体的标准件库资源共享研究

针对目前标准件库不支持异构CAD系统和标准件信息不完整两个主要问题,提出了一种基于细胞元本体的标准件库资源共享方法。该方法使用Web本体描述语言(Web Ontology Language,OWL)表示细胞元本体模型,制定语义映射规则,以细胞为转换单元,屏蔽了信息表示的异构性,使应用本体和细胞元本体成为具有语义关系的逻辑上的整体,实现了异构CAD系统对标准件库的共享及异构数据的实时转换。该方法应用在Pro/E,UG和CATIA3个CAD平台的同步协同设计中,证明了其可行性。     

基于Pro／E的产品模型管理及重用性设计

提出一种合理有效利用Pro／E的二次开发方法,以工程中常用的齿轮、轴承、弹簧等标准件和常用件为例,创建内嵌于Pro／E、便于进行人机交互的产品模型管理及零部件重用的设计系统,为产品的快速设计与CAD集成提供有效技术支持。该方法已应用到实际产品研发中,取得了较好的效果。     

基于UG/Open API技术的参数化标准件库的开发

提出一种基于UG建立开放式三维参数化标准件库的方法，论述了在UG／OpenAPI开发平台上，创建参数化图库、设计用户界面、实现参数化尺寸驱动和建立装配环境的过程，总结了系统的主要功能和特点。     

标准件库自动生成系统的开发

本文叙述了标准件库自动生成系统开发的理论与方法。提出和采用了程序与数据分离的思想、数据驱动的思想、参数化设计的方法，建立了一个标准件库自动生成系统，并在此系统上开发了两个标准件库，Futaba注塑模标准模架库和国标紧固件库。     

Call for Papers The 6^th International Conference on Grid and Cooperative Computing

Recent years have seen rapid advances in various grid-related technologies, middleware, and applications. The GCC conference has become one of the largest scientific events worldwide in grid and cooperative computing. The 6th international conference on grid and cooperative computing (GCC2007) Sponsored by China Computer Federation (CCF),Institute of Computing Technology, Chinese Academy of Sciences (ICT) and Xinjiang University ,and in Cooperation with IEEE Computer Soceity ,is to be held from August 16 to 18, 2007 in Urumchi, Xinjiang, China.     

煤矿井下安全监控分站的设计及其仿真实现

为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.     

法律信息库系统

本文分析了法律数据库的结构和特点，介绍了采用面向对象设计方法和超文本数据库技术开发和实现法律信息库系统将作为重要网络资源之一为不同用户进行法律咨询服务。     

View-based model-driven architecture for enhancing maintainability of data access services

In modern service-oriented architectures, database access is done by a special type of services, the so-called data access services (DAS). Though, particularly in data-intensive applications, using and developing DAS are very common today, the link between the DAS and their implementation, e.g. a layer of data access objects (DAOs) encapsulating the database queries, still is not sufficiently elaborated, yet. As a result, as the number of DAS grows, finding the desired DAS for reuse and/or associated documentation can become an impossible task. In this paper we focus on bridging this gap between the DAS and their implementation by presenting a view-based, model-driven data access architecture (VMDA) managing models of the DAS, DAOs and database queries in a queryable manner. Our models support tailored views of different stakeholders and are scalable with all types of DAS implementations. In this paper we show that our view-based and model driven architecture approach can enhance software development productivity and maintainability by improving DAS documentation. Moreover, our VMDA opens a wide range of applications such as evaluating DAS usage for DAS performance optimization. Furthermore, we provide tool support and illustrate the applicability of our VMDA in a large-scale case study. Finally, we quantitatively prove that our approach performs with acceptable response times.     

International Journal of Automation and Computing Table of Contents

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Information for authors

正SCIENCE CHINA Information Sciences(Sci China Inf Sci),cosponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China,and published by Science China Press,is committed to publishing highquality,original results of both basic and applied research in all areas of information sciences,including computer science and technology;systems science,control science and engineering(published in Issues with odd numbers);information and communication engineering;electronic science and technology(published in Issues with even numbers).Sci China Inf Sci is published monthly in both print and electronic forms.It is indexed by Academic OneFile,Astrophysics Data System(ADS),CSA,Cabells,Current Contents/Engineering,Computing and Technology,DBLP,Digital Mathematics Registry,Earthquake Engineering Abstracts,Engineering Index,Engineered Materials Abstracts,Gale,Google,INSPEC,Journal Citation Reports/Science Edition,Mathematical Reviews,OCLC,ProQuest,SCOPUS,Science Citation Index Expanded,Summon by Serial Solutions,VINITI,Zentralblatt MATH.     

Erratum to: Fast global kernel fuzzy c-means clustering algorithm for consonant/vowel segmentation of speech signal

正Erratum to:J Zhejiang Univ-Sci C(ComputElectron)2014 15(7):551-563doi:10.1631/jzus.C1300320The original version of this article unfortunately contained mistakes.Algorithm 6 should be as follows:Algorithm 6 FGKFCM-F clustering Input:(1)X={x_1,x_2,…,x_N},,x_iR~d,i=1,2,…,N,the dataset;(2)C,1C≤N,the number of clusters;(3)ε0,the stopping criterion;     

Journal of Zhejiang University-SCIENCE C (Computers & Electronics) Total contents

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A pragmatic multi-method investigation of discrepant technological events: Coping,attributions, and ‘accidental’ learning

Discrepant technological events or situations that entail a problem, a misunderstanding or a difficulty with the Information Technology (IT) being employed, are common in the workplace, and can lead to frustration and avoidance behaviors. Little is known, however, about how individuals cope with these events. This paper examines these events by using a multi-method pragmatic approach informed by coping theory. The results of two studies – a critical incident study and an experiment – serve to build and test, respectively, a theoretical model that posits that individuals use a variety of strategies when dealing with these events: they experience negative emotions, make external attributions, and adopt engagement coping strategies directed at solving the event, eventually switching to a disengagement coping strategy when they feel they have no control over the situation. Furthermore, users’ efforts may result in ‘accidental’ learning as they try to overcome the discrepant IT events through engagement coping. The paper ends with a discussion of the results in light of existing literature, future opportunities for research, and implications for practice.