一个面向对象的Java程序生成器

JPG是作者设计的一个Java应用程序生成器．它包括一个面向对象的非过程化语言OO-ADL及其编译器和一个可视化的界面生成器UIG。OO－ADL允许用户以语言的方式定义用户需求,然后通过OO－ADL编译器将该需求编译为Java代码、UIG以可视化的操作方式帮助用户生成用户界面的Java代码。文中介绍了JPG的基本思想、结构,OO－ADL语言的语法定义,OO－ADL编译器和UIG的Java代码生成技术。     

友好的人机交互界面是软件的生存基础 --多媒体语音动画联机帮助系统的建立

一、多媒体语音动画帮助系统的设计思想在设计应用软件主窗体的菜单时,增加一个“帮助”选项,以此调用多媒体语音动画帮助系统;在调用多媒体语音动画帮助系统的同时,应用软件能正常运行;多媒体语音动画帮助系统退出时,仍能返回到用户工作程序现场;另外,还要在主窗体激活事件中注册一个全局帮助热键,以便在程序运行的任意时刻,用户只需按一下热键即可调出多媒体语音动画帮助系统;在应用软件的每个功能模块的子窗体中还可以增加一个弹出菜单(TPopupMenu)控件。二、多媒体语音动画帮助系统的主体设计多媒体语音动画帮助系统为一个独立窗体,在…     

Linux下X—Windows系统程序设计简介

１ Ｘ－Ｗｉｎｄｏｗ系统 软件设计人员在Ｌｉｎｕｘ或其它Ｕｎｉｘ系统中进行软件开发时几乎都要利用图形用户界面,而Ｘ－Ｗｉｎｄｏｗ系统是Ｌｉｎｕｘ和许多其他ＵＮＩＸ系统使用的图形窗口系统。 Ｘ－Ｗｉｎｄｏｗ系统可看成一个构造用户界面的完整平台,已为许多人接受,并已成为事实上的工业标准。该系统给用户提供了从运算、绘图到图形用户界面设计的完整应用程序解决方案。它允许程序员开发可移植的图形用户界面,并且提供了图形及界面的设计机制,而不规定风格,用户可任意发挥,自由地设计所需要的界面。 Ｘ－Ｗｉｎｄｏｗ系统一…     

Delphi及其在监控系统中的应用

简要介绍了一种可视化编程工具－－Ｄｅｌｐｈｉ的功能和特点,并介绍了利用Ｄｅｌｐｈｉ开发智能建筑监控系统用户操作界面的设计思想、系统构成与软件功能。阐述了作者使用Ｄｅｌｐｈｉ编写监控系统软件的体会。     

友好的人机交互界面是软件的生存基础 --多媒体语音动画联机帮助系统的建立

一、多媒体语音动画帮助系统的设计思想 在设计应用软件主窗体的菜单时,增加一个"帮助"选项,以此调用多媒体语音动画帮助系统;在调用多媒体语音动画帮助系统的同时,应用软件能正常运行;多媒体语音动画帮助系统退出时,仍能返回到用户工作程序现场;另外,还要在主窗体激活事件中注册一个全局帮助热键,以便在程序运行的任意时刻,用户只需按一下热键即可调出多媒体语音动画帮助系统;在应用软件的每个功能模块的子窗体中还可以增加一个弹出菜单(TPopupMenu)控件.     

微机系统窗口图形用户界面管理系统的设计与实现

计算机用户接口设计是计算机应用系统的一个重要发展方向。本文在论述了用户接口设计的理论与实现方法的基础上，设计并生成了一个在微机系统上运行的用户界面管理系统：ＷＧ－ＵＩＭＳ，该系统现于３８６档微机上，以ＭＩＣＲＯＳＯＦＴ ＷＩＮＤＯＷＳ３．０为支持环境，是一个集文字、图形为一体的ＵＩＭＳ。文中着重对ＷＧ－ＵＩＭＳ中的接口生成工作的设计思想、理论原型、实现过程及关键性数据结构等进行了论述。     

一个基于VSM的个性化信息推荐系统

为了帮助用户从Internet上方便地获得信息，针对Proxy用户环境设计了一个信息推荐系统。先通过Proxy日志挖掘获得用户兴趣，再根据向量空间模型为用户生成兴趣特征，并据此对用户进行信息推荐。系统通过服务评估和反馈来保证信息推荐的质量。     

Windows应用程序界面设计的若干问题

界面设计是软件开发的重要组成部分，本文论述了实现美观、实用的用户界面必须注意的几个问题，如界面设计的美学原则、可用性设计的概念、当用户或系统出错时的用户交互形式、帮助使用的用户辅助模式以及为使应用程序运行于不同计算机的显示类型设计。     

基于动态网页技术的多媒体演示系统

介绍一种网络多媒体演示系统,这种系统可以让用户轻松地设计自己的多媒体演示,而不再受演示技术或演示时间地点的限制.系统由三部分组成：用户接口－－－包括时间规格编辑器,空间规格编辑器,多媒体物件接口;演示接口;知识库.系统中还包括一个动态网页生成器.文章给出了一个基于Allen定律的演示算法,用该算法实现了多媒体物件的同步显示.     

Windows帮助系统的安全漏洞

Windows的HTML帮助系统的设计目的是通过图形、多媒体和链接信息帮助PC用户更好地使用Windows，但是黑客可以利用这个系统来进入您的文件，甚至控制您的PC。     

European Community policy and the market

Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven.     

一种自适应子融合集成多分类器方法

融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。     

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.     

Explanation and prediction: an architecture for default and abductive reasoning

Although there are many arguments that logic is an appropriate tool for artificial intelligence, there has been a perceived problem with the monotonicity of classical logic. This paper elaborates on the idea that reasoning should be viewed as theory formation where logic tells us the consequences of our assumptions. The two activities of predicting what is expected to be true and explaining observations are considered in a simple theory formation framework. Properties of each activity are discussed, along with a number of proposals as to what should be predicted or accepted as reasonable explanations. An architecture is proposed to combine explanation and prediction into one coherent framework. Algorithms used to implement the system as well as examples from a running implementation are given.     

Three Process Perspectives: Organizations, Teams, and People

This paper provides the author's personal views and perspectives on software process improvement. Starting with his first work on technology assessment in IBM over 20 years ago, Watts Humphrey describes the process improvement work he has been directly involved in. This includes the development of the early process assessment methods, the original design of the CMM, and the introduction of the Personal Software Process (PSP)^SM and Team Software Process (TSP){^SM}. In addition to describing the original motivation for this work, the author also reviews many of the problems he and his associates encountered and why they solved them the way they did. He also comments on the outstanding issues and likely directions for future work. Finally, this work has built on the experiences and contributions of many people. Mr. Humphrey only describes work that he was personally involved in and he names many of the key contributors. However, so many people have been involved in this work that a full list of the important participants would be impractical.     

基于复小波噪声方差显著修正的SAR图像去噪

提出了一种基于复小波域统计建模与噪声方差估计显著性修正相结合的合成孔径雷达(Synthetic Aperture Radar,SAR)图像斑点噪声滤波方法。该方法首先通过对数变换将乘性噪声模型转化为加性噪声模型,然后对变换后的图像进行双树复小波变换(Dualtree Complex Wavelet Transform,DCWT),并对复数小波系数的统计分布进行建模。在此先验分布的基础上,通过运用贝叶斯估计方法从含噪系数中恢复原始系数,达到滤除噪声的目的。实验结果表明该方法在去除噪声的同时保留了图像的细节信息,取得了很好的降噪效果。     

How do children do mathematics with LOGO?

Abstract  This paper considers some results of a study designed to investigate the kinds of mathematical activity undertaken by children (aged between 8 and 11) as they learned to program in LOGO. A model of learning modes is proposed, which attempts to describe the ways in which children used and acquired understanding of the programming/mathematical concepts involved. The remainder of the paper is concerned with discussing the validity and limitations of the model, and its implications for further research and curriculum development.     

Editorial: Special issue on recent advances in hybrid control theory and applications

正The demands of a rapidly advancing technology for faster and more accurate controllers have always had a strong influence on the progress of automatic control theory.In recent years control problems have been arising with increasing frequency in widely different areas,which cannot be addressed using conventional control techniques.The principal reason for this is the fact that a highly competitive economy is forcing systems to operate in regimes where     

Information for Authors

正Aim The Journals of Zhejiang University-SCIENCE(A/B/C)areedited by the international board of distinguished Chinese andforeign scientists,and are aimed to present the latest devel-opments and achievements in scientific research in China andoverseas to the world’s scientific circles,especially to stimulateand promote academic exchange between Chinese and for-eign scientists everywhere.     

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.