基于MFC的图形分页与缩放打印系统的设计与实现

讨论了图形设计应用中图形缩放打印系统的设计,就设计图元的虚拟图纸设定、图形分页计算、物理图元尺寸与屏幕图元尺寸的关系及分页打印系统中打印内容划分与多页拼接等问题进行了详细的探讨.     

图形技术在系统仿真中的应用

本文首先从应用对系统仿真提出的要求出发，讨论了图形技术在系统仿真中的地位及应用范围，然后着重介绍了系统仿真中的动画仿真和图形建模技术，提出了实现动画仿真和图形建模必须解决的关键技术问题，并结合ＩＭＳＳ给出了实现动画仿真和图形建模的一种方法。     

图形在程序设计中的应用

图形由于其丰富的信息量和多维性被广泛地应用于很多方面.本文叙述了图形在程序设计各个阶段的应用分类,介绍了一些典型系统中图形的作用.最后还讨论了存在的问题.     

三维图形显示系统的图形消除器和象素处理器技术实现

图形消隐器和象素处理器是三维图形显示系统的重要组成部分。讨论了图形消除器和象素处理器的算法,结合具体的硬件电路提出了实现设计的思路,实践应用表明了这种设计的可行性。     

工程数据库管理系统EDBMS的设计与实现

本文从数据管理和工程应用两个方面介绍了一个直接与图形接口管理环境(GIME)、几何造型系统GEMS、交互绘图系统GIS等相联接的面向工程应用的数据库管理系统EDBMS的设计与实现,并讨论了适合于工程应用的系统数据模型、用户接口及其与图形处理系统之间的接口问题.     

论计算机图形显示技术

本文论述计算机图形显示器各方案,着重讨论了随机和光栅扫描式图形显示器,以及有限图形和全图形显示器的特点。文中特别探讨了智能和非智能图形显示终端的差异,进而研究智能图形显示软件以及图形处理软件的开发问题。最后,从图形显示系统的应用出发,总结了图形显示器的选择要点。     

电话图形配线CAD系统

本文介绍了我们开发的电话图形配线ＣＡＤ系统．主要讨论城区地理图形的识别与转换，图形的编辑、检索、拼接，以及电话配线等功能模块的实现．最后阐明了系统的组成与特点     

图形协同标绘系统的研究与设计

讨论了一个远程同步的图形协同系统的设计与实现,重点研究了在协同工作中的交互技术,讨论了人－人界面的图形交互技术,并发控制策略以及协同感知的设计。     

矢量图形编辑系统的数据模型及其实现

以电力行业为实际应用背景，本文提出了一组基于SVG的矢量图形编辑系统的数据模型，主要包括类结构、图元描述模型和SVG解析模型；同时，以该模型为基础设计和实现了一个独立于具体应用的矢量图形编辑系统，讨论了该系统的设计思想和体系结构，并对各部分功能进行了分析。     

组件技术在交互式图形设计系统中的应用

该文主要讨论了COM技术的基本原理及其在交互图形设计系统中的应用,提出了一种以COM技术为基础的基于交互技术的图形单元组件的模型,并在开发中具体实现了该模型。     

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

正~~     

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

正~~     

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.