基于CSCW的网络教室的研究

本文介绍了CSCW系统中应用共享机制和并发控制理论,设计了一个运行在Windows环境下的、基于CSCW的网络教室系统.设计了系统中的网络通信方式,研究了网络教室中进行大量图像数据传送时数据的压缩处理方法.     

树的数据结构的改进研究

本文首先简单介绍了树的原理,然后在分析目录树的基础上给出了一种改进后的树存储数据结构,它在维护大量数据的同时,降低了数据冗余度。在建立树的经典数据结构的基础上提出了一种基于哈希算法的树构建数据结构。通过分析它们的时间复杂度,均较改进前有了较大减少。     

高性能的异步复制系统的设计

为了提高整个远程复制系统的性能,对卷复制系统进行了优化.采用了多线程并行处理技术和流水线技术,设计了一种高性能的日志和位图,采用了网络自适应的复制协议和高效的请求合并策略.实验结果表明,该优化策略减少了应用等待的时间,降低了网络发送的时间开销,合理利用了有限的复制带宽,提高了复制效率.     

基于SnmpSharpNet的网络管理系统的研究

简单分析了SNMP协议,介绍了SNMP编程原理,构造了一个基于B/S架构的网管系统模型,结合C#编写的SNMP开发包SnmpSharpNet,运用流行的WEB技术,给出了一个网络管理系统实现的基本方法。     

基于认证的产生式系统模型的研究

文中在描述了认证和产生式系统的重要性之后,对通常用于专家系统的产生式系统组织进行了叙述。根据用于认证的产生式系统的特殊性,建立了其模型图,叙述了工作原理,讨论该产生式系统的组成。最后,解释了其安全性能。     

基于工作流的临床诊治系统的开发

阐述了开发临床诊治信息系统的必要性,介绍了工作流的现状,探讨了工作流参考模型.提出了建立在工作流基础上的临床诊治信息系统的开发方法和功能要求.设计了系统的体系结构,探讨了系统开发的技术路线和实现方案,通过对有限状态机和Petri网的性能比较,设计出了基于Petri Net网的临床诊治系统模型.最后通过系统的正常运行验证了设计思路和模型的正确性.     

基于内容的图像检索系统的最新进展

该文在分析现有的基于内容的图像检索系统结构的基础上,探讨了系统中的关键技术和当前主要优化方法,介绍了目前的系统应用情况,着重归纳了图像检索系统研究的最新进展,并详细阐明了当前研究中存在的问题,最后指出了今后进一步研究的方向。     

基于商业企业的电子商务系统的研究

分析了商业企业中电子商务系统的构建原则 ,研究了基于该原则的电子商务系统的总体设计 ,提出了这类电子商务系统的网络结构与系统功能及网络系统的技术架构     

基于Creator的汽车试验场的建立

基于虚拟现实技术开发的汽车仿真试验场具有真实、廉价、实用性强等特点.文中详细介绍了使用Creator软件构建汽车试验场的过程和方法,论述了高质量场景的建模技术,对场景的地形构造、纹理制作及映射、道路模型的构造等建模技术进行了探讨.提出了场景数据的优化显示技术和场景模型简化方法,提高了场景模型在仿真运行过程中的实时效率.最后给出了汽车仿真试验场建模的实例,并探讨建模过程中应注意的问题.     

基于GPRS的两要素自动气象站的设计

设计了一个基于GPRS的两要素自动气象站,并实现了气象要素采集的自动化和网络化.文中首先讨论了GPRS数据通讯的优点、分析了温度、雨量要素传感器的接口特点.在电路设计部分,以ADuC812微控制器为核心,讨论了GPRS的通讯接口的设计;详细介绍了铂电阻测量电路可能引起误差的恒流源、外接引线等问题的处理;以及外部干扰引起测雨计数误跳等问题的处理.     

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     

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。