CORBA分布对象计算方面的特性

网络技术的发展与面向对象技术的普遍采用促使了分布对象计算技术的产生和应用.文章简述了这一新技术的发展过程,对OMG的CORBA技术在分布对象计算方面的结构设计与对象管理进行分析,指出了它的优越特性和今后的发展趋势.     

异构分布对象系统集成模型研究

分布对象计算技术为用户提供了方便的分布应用开发工具。然而,随着分布对象计算技术的应用和发展,异构分布对象系统的集成也正在成为急需解决的问题。用户对异构分布对象系统的集成有各种各样的需求,因此提供异构分布对象系统集成的工具也多种多样。文中将现有的异构分布对象系统的集成工具归纳为四种集成模型,并在对它们进行比较的基础上结合应用需求讨论了各种集成模型的适用场合。     

纯面向对象数据库分布式计算技术的性能测评

由于数据库技术的制约,分布式系统对象持久化技术的顺利发展受到影响。纯面向对象数据库的出现有望使这一局面根本改观。通过分布计算实例,不仅验证了这项新技术的可行性,而且经与其它典型分布对象技术比较,许多方面都表现出良好的特性。由此可以推断,基于纯面向对象数据库的持久化方案对于分布对象技术的发展将起到关键作用 。     

基于分布对象计算的CORBA研究

CORBA是分布计算和对象模型这两者的完美结合。本文介绍了基于分布对象计算的CORBA技术概况，分析了其技术特点及与其他相关技术的联系，并提出自己的看法。     

J2EE平台典型分布对象技术的性能

为多种分布对象技术选择最佳设计方案时,须对其进行性能测试与分析评估。该文通过圆周率的高精度计算,即利用Bailey-Borwein-Plouffe算法对J2EE中几种常见的分布对象技术实施运行测试,测试数据反映了分布对象技术的计算性能和启动特性。讨论测试结果对设计J2EE分布式计算系统的指导意义。     

面向对象的WWW计算与智能工具InfServer的研究

分布对象技术与WWW技术的融合是分布计算技术未来的发展方向。本文提出了一种融合分布对象技术与WWW技术的面向对象的WWW计算模型;讨论了这种模型的工作原理和特点。基于该模型;我们设计了一个面向Intranet/Intemet应用的智能工具InfServer,介绍了InfServer智能推理服务对象、ActiveX桥接控件与Java桥接包的实现方法．InfServer目前已在农业、石油、渔业、医疗诊断和后勤保障等领域投入使用。     

基于分布对象的高性能计算技术的探讨

近几年来,分布对象技术引起了一些从事高性能计算技术研究者的注意,他们试图利用分布对象技术的封装。易于扩展和复用的特性,构造易用的、可复用的高性能计算系统。分布对象结构可分为构件框架层、分布结构层和进程通信层。针对这三个层次,将基于分布对象的高性能计算研究分为三类并分别进行了综述和分析。最后简单介绍所实现的一个分布对象的高性能计算框架ＨＰＣＡ。     

基于RMI的分布式计算技术研究及应用

分布计算是当前软件开发技术的重要发展方向之一。分析基于分布对象的分布计算模型，探讨RMI的体系结构、工作机制、安全机制及异常处理，给出基于RMI的分布计算的基本解决方案，运用RMI并结合JDBC技术设计实现一个三层架构的分布式成绩查询系统，最后总结RMI的优势与不足。     

一种基于分布对象技术的Agent计算框架

随着ＣＯＲＢＡ等分布计算技术的发展,分布式应用开始关注系统的可靠性,可用性,开放性,计算资源共享与可重用等问题。面向Ａｇｅｎｔ的分布计算技术是解决上述问题的有效手段。文中基于面向Ａｇｅｎｔ的计算观点,论述了分布式应用及其内部分布对象之间的关系,并针对系统可靠性以及可用性的需求,在ＣＯＲＢＡ平台上实现了一个Ａｇｅｎｔ框架,用于构造面向Ａｇｎｅｔ的分布式应用。     

基于分布对象的同步回调模型的研究与实现

分布对象技术是分布异构环境下软件开发和系统集成的良好解决方案,然而在高性能分布计算领域,传统调用模型在异步特性方面的不足限制了分布对象技术在该领域的应用。因此,本文介绍一种新的基于分布对象的异步回调模型。测试表明,该模型能够有效改善分布对象系统的性能。     

Only connect: teaching, technology and telesis

Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained.     

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。     

Avoiding semantic and temporal gaps in developing software intensive systems

Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them.     

Designing economic np control charts: A programmed simulation approach

This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives.     

The development of robot art

Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest. This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January 31–February 2, 2008     

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。     

基于QTE的蒙古文显示机制研究与实现

蒙古语言是中国蒙古族使用的通用语言,由于蒙古文区别于其他文字的书写方式和其自身变形机制等特点,在很多通用的文字处理引擎中都不被支持。在嵌入式产品开发与应用领域中Linux加QTE已经成为流行方式。该文给出了一种在QTE环境上实现基于标准Unicode的蒙古文点阵显示和变形算法, 并自定义了支持蒙古文的QTE组件,扩展了QTE功能,为在Linux加QTE方式的嵌入式体系结构中处理蒙古文提供了一种解决方法。