XYZ系统在动画设计中的应用

ＸＹＺ系统是一套以线形时序逻辑为基础的ＣＡＳＥ环境系统，其核心是时序逻辑语言ＸＹＺ／Ｅ．ＸＹＺ／ＡＤＬ（ａｎｉｍａｔｉｏｎｄｅｓｃｒｉｐｔｉｏｎｌａｎｇｕａｇｅ）是ＸＹＺ系统在动画领域的应用．马华东博士采用基于时序逻辑的动画描述模型ＴＬＡＤ（ｔｅｍｐｏｒａｌ－ｌｏｇｉｃ－ｂａｓｅｄａｎｉｍａｔｉｏｎｄｅｓｃｒｉｐｔｉｏｎｍｏｄｅｌ），提出了动画剧本描述语言（ＳＤＬ／Ａ）．本文介绍的ＸＹＺ／ＡＤＬ语言是以ＸＹＺ／Ｅ的框架为基础扩充ＳＤＬ／Ａ而成．它使用ＸＹＺ／Ｅ中面向对象程序设计的基本结构——代理机构（Ａｇｅｎｔ）作为基本描述单元．代理机构由通讯进程和相应的包块构成，包块处理对象封装，进程处理通讯．从而能更方便地刻画动画过程中的复杂、多层次的角色（包括父子角色）的运动特征及多角色之间的同步协调关系，并且在统一的逻辑框架下实现了计算机动画中运动对象的行为抽象和运动的抽象描述，更具一般性．     

多系统扩展接口（MXI）的研究

介绍了用于多个设备之间高速通信的多系统扩展接口，并就以ＰＣＩ总线扩展的微机作为ＶＸＩ控制器，讨论了ＶＸＩ系统的组成和ＭＸＩｂｕｓ的结构（硬件和软件结构），分析了ＭＸＩｂｕｓ接口的应用特点。     

μXL在高校实验中的应用

在简单介绍μＸＬ系统基本组成的基础上，从教学实验的角度，分别叙述了μＸＬ控制设备在过程建模、控制器参数整定和组织专门控制系统等方面的应用。     

卫星姿态控制VXI自动化测试系统

卫星姿态控制ＶＸＩ自动化测试系统（以下简称姿控ＶＸＩ测试系统）是针对卫星姿态控制系统的测试而开发的，达到了国际先进水平。本文介绍了姿控ＶＸＩ测试系统的研制过程、系统的技术指标和系统中采用的先进技术和措施。     

XML：新一代Web页面标记语言

ＸＭＬ（ｅＸｔｅｎｓｉｂｌｅ Ｍａｒｋｕｐ Ｌａｎｇｕａｇｅ／可扩展标记语言）是Ｗ３Ｃ（互联网联合组织）他建的一组规范，它弥补了传统ＨＴＭＬ的缺陷，受到了越来越多业界人士的关注，本语文介绍了ＸＭＬ产生的背景，描述了ＸＭＬ的概念及其应用领域，最后展望了ＸＭＬ广阔的发展前景。     

一个以μVAX—Ⅱ为主机的双机电力调度自动化计算机系统

本文介绍了一个以双μＶＡＸ－Ⅱ为主要，包括通信控制器（ＣＣＵ），智能图形控制器（ＧＣ），模拟屏控制器，彩色汉字打印机，六笔绘图仪，天文钟控制器，双机切换控制器等设备的准省级电力调度自动化计算机系统，介绍了系统的功能，配置及特点，总体设计，软件设计等，并对运行状进行简单介绍。该系统经过剪裁也可用于其它工业领域。     

一个以μVAX－Ⅱ为主机的双机电力调度自动化计算机系统

本文介绍了一个以双μ－ＶＡＸ－Ⅱ为主机，包括通信控制器（ＣＣＵ）、智能图形控制器（ＧＣ）、模拟屏控制器、彩色汉字打印机、六笔绘图仪、天文钟控制器、双机切换控制器等设备的准省级电力调度自动化计算机系统。介绍了系统的功能、配置及特点、总体设计、软件设计等，并对运行状况进行了简单介绍。该系统经过剪裁也可用于其它工业领域。     

HTML向何处去

近期，ｗｗｗ协会（Ｗ３Ｃ）将推荐扩展标记语言ＸＭＬ（ｅｘｔｅｎｓｉｂｌｅＭａｒｋｕｐＬａｎｇｕａｇｅ）１．０作为超文本标记语言ＨＴＭＬ之后的又一个标准。ＸＭＬ与ＨＴＭＬ一样，都是ＳＧＭＬ（ＳｔａｎｄａｒｄＧｅｎｅｒａｌｉｚｅｄＭａｒｋｕｐＬａｎｇｕａ...     

工程试验卫星ETS—VI的姿态控制系统试验

为了确定受动态扰动影响的大型挠性结构和卫星的基本姿态控制技术，我们利用１９９４年发射的工程试验卫星（ＥＴＳ－ＶＩ），开展了姿态控制系统试验（ＡＣＳＥ）。ＡＣＳＥ共有多项试验，如挠性结构控制试验（ＦＬＥＸ）。本文介绍ＡＣＳＥ的结果以及试验数据的分析。     

一种可混合编程的可编程控制器

一种可混合编程的可编程控制器西北纺织学院高季雍１引言在工业控制中，以微机为核心的可编程控制装置的应用在迅速扩大。典型的有可编程控制器（简称＊ｃ，以前叫可编程逻辑控制器，简称ＰＬＣ）和可编程调节器（以下简称ＰＴ），大规模的就是集散系统。ＰＣ是对逻辑顺控...     

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.