CORBA技术在电子警察系统中的应用研究

研究如何应用公共对象请求代理体系结构(CORBA)技术在现有交通系统基础上提高其信息共享性、可扩展性等,来满足未来智能交通系统(ITS)的发展.介绍了CORBA技术的工作原理,然后以电子警察子系统为背景,研究了CORBA技术在该系统中的应用及如何实现,以及编写CORBA应用程序的一般步骤,并给出该系统实现的核心框架代码.最后得出结论,CORBA技术是实现分布式异构环境的最理想体系结构,采用CORBA技术的电子警察系统是可行的,可以满足未来智能交通系统的发展.     

基于移动Agent的双向CORBA系统

CORBA技术和移动Agent技术都是目前国内外研发的热点。将以上两种流行技术融合，使CORBA中的对象(服务器方以及客户方)具有移动Agent的特点是本文的设计思想。基于以上思想，本文给出了一种基于移动Agent的双向CORBA系统体系结构及其原型系统(称之为agentCORBA)，并重点解决了在CORBA服务器方对象(如servant)移动的情况下对象命名服务的透明性问题。本文最后给出了一个基于该体系结构的简单应用实例，用以检测该体系结构及其原型系统的正确性和可用性。     

基于CORBA的应用系统实现方法

传统的分布式系统是基于RPC（远程过程调用）标准的，存在许多缺陷，限制了分布式技术的进一步发展。CORBA规范弥补了传统的分布式技术的不足，是分布式技术和面向对象技术结合的产物。本文在阐述CORBA系统的体系结构的基础上，研究了基于CORBA系统的应用系统的实现方法。作为CORBA应用系统开发实例，以Orbix2000为平台，开发了一简单企业职工信息管理系统。     

视频技术在智能交通系统中的应用

论述了图像信号处理技术在智能交通系统(ITS)中应用的热点和关键问题。针对智能交通管理系统的多个应用实例，如城市交通智能监控、电子警察系统及流量监测和交通诱导系统等，给出了应用视频技术的解决方案，并与传统的交通管理方式作了对比。     

一种基于移动Agent的双向CORBA系统体系结构及其实现

CORBA技术和移动Agent技术都是目前国内外研发的热点，将以上两种流行技术融合，使CORBA中的对象（服务器方以及客户方）具有移动Agent的特点是本文的设计思想，基于以上思想，本文给出了一种基于移动Agent的双向CORBA系统体系结构及其原型系统（称之为agentCORBA)，并重点解决了在CORBA服务器方对象移动的情况下对象命名服务的透明性问题，文本最后给出了一个基于该体系结构的简单应用实例，用以检测该体系结构及其原型系统的正确性和可用性。     

CORBA技术在寻呼、短信秘书台建设中的应用

CORBA是OMG提出的一种公用对象请求代理体系结构，是当今软件发展的一种新技术，它支持分布式异构应用软件对象之间的通信。在分析了目前常用的几种应用软件体系结构的基础上，为海南联通寻呼、短消息秘书台系统设计和实现了一个合理的基于CORBA技术的分布式应用体系结构，该系统通过运用CORBA技术，缓解了由于大量的客户端接入引起的对数据库服务器造成的压力，解决了原先各种异构系统之间的通讯问题，提高了系统的工作效率和稳定性，对于分布式异构应用系统的开发研究具有重要意义。     

城市智能交通系统技术发展现状及趋势

城市化的快速发展带来一系列的交通问题,智能交通系统(Intelligent Transportation Systems,ITS)是解决交通问题的有效途径之一。本文主要介绍了智能交通系统的概念与内涵、我国城市智能交通系统技术发展与智能交通管控系统应用现状,在上述内容的基础上,总结了我国城市智能交通系统未来的发展趋势。     

CORBA中的异步传输机制

近几年来，随着Internet的发展，跨异步系统计算机分布式计算成为未来的发展趋势，CORBA技术为此提供了一套完整的体系结构，同时也完成了从研究走向应用的步骤。本文主要讨论了的CORBA的异步传输机制ONEWAY以及事件服务。同时给出用DELPHIL利用ONEWAY以及事件服务异步传输机制实现的简单模型。     

基于CORBA的B／S模式的实时信息分布技术

本文提出了一种基于CORBA的B／S模式下的实时信息发布技术及实时信息发布系统的体系结构。该技术以CORBA提供的事件,ORB以及IIOP等来实现实时信息的网上传送，以CORBA提供的跨平台对象互操作能力和Browser的对象嵌入技术实现实时信息的一致性的表达，并描述了这个融合CORBA和Browser/Server模式优点的应用系统的体系结构。     

CPS体系结构设计

Cyber-Physical System(CPS)是基于网络和嵌入式系统等技术而发展起来的下一代智能系统。体系结构是CPS的骨架和灵魂。分析了CPS概念和特性,构建了CPS三层体系结构框架,分别为包含实体的物理层、将资源互联互通的网络层和为用户提供服务的应用层。并对各层进行了深入分析,给出了各层相关概念描述。通过智能交通系统体系结构实例证明了CPS三层体系结构框架符合CPS概念,能够反映CPS特性,能够指导未来CPS研究和系统开发。     

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。     

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.