基于移动Agent的网上购物系统设计与分析

传统电子商务存在的一些问题,移动Agent技术能很好的解决这些问题,讨论了移动Agent在电子商务中的主要应用,并设计了基于移动Agent的网上购物系统模型,最后分析了该模型的优点及不足。     

移动多Agent在移动电子商务系统中的应用

随着移动计算技术的发展，传统的电子商务开始进入移动电子商务时代，而在移动电子商务中引入移动Agent技术具有很多的优势，它可以提高电子商务工作的效率，加快移动电子商务的普及。在分析移动Agent系统的基础上，重点介绍基于移动Agent的移动电子商务功能结构和移动Agent的迁移实现。提出几种移动电子商务的安全技术和移动电子商务中引入移动Agent时的问题。     

基于移动Agent的Web服务系统模型研究与构建

随着电子商务应用的不断发展,对于基于Web的网络服务的要求不断增强。在分析了Web服务现状的基础上,指出了其存在的不足,并阐述了移动Agent节约网络带宽、负载均衡、并行计算等方面的应用优势,结合这些优势,给出了一个基于移动Agent的Web服务系统框架模型。该模型通过可信Web服务中心监管Agent及其宿主的行为,从而在一定程度上解决了Web服务以及移动Agent的安全问题,从而建立了一个安全、可靠的基于移动Agent的Web服务系统,并对解决移动Agent的安全问题作了有益的探讨。     

基于移动Agent的Web服务系统模型研究与构建

随着电子商务应用的不断发展,对于基于Web的网络服务的要求不断增强.在分析了Web服务现状的基础上,指出了其存在的不足,并阐述了移动Agent节约网络带宽、负载均衡、并行计算等方面的应用优势,结合这些优势,给出了一个基于移动Agent的Web服务系统框架模型.该模型通过可信Web服务中心监管Agent及其宿主的行为,从而在一定程度上解决了Web服务以及移动Agent的安全问题,从而建立了一个安全、可靠的基于移动Agent的Web服务系统,并对解决移动Agent的安全问题作了有益的探讨.     

多Agent系统的安全性研究

移动Agent技术为建立电子商务、移动计算等分布式应用系统提供了灵活、强大的方法。在构建这些系统的过程中,安全性是一个十分关键的问题。我们必须建立一种足够安全的体系结构,防止恶意的Agent攻击主机和确保Agent自身的完整性。文章研究了多Agent系统中的安全问题和加强安全性的方法。     

基于移动Agent的自动协商应用

主要研究电子商务中的协商问题,为实现自动协商提供了一个可行的方向。通过分析目前电子商务的协商现状及所存在的问题,提出将移动Agent技术引入电子商务,为B2C电子商务中一对多的协商问题自动化指出了一个实现方向,并得出基于移动Agent的自动协商系统的建设目标及特点。这将对于实现电子商务协商的自动化,提供有力的理论支持及发展方向。     

一种适用于移动Agent系统的双向认证协议

移动Agent系统的安全问题一直是移动Agent技术走向实际应用的巨大障碍.以面向电子商务的移动A-gent系统为背景,研究主机与主机的双向认证问题,提出一种适用于移动Agent系统的双向认证协议,并对协议的安全性能进行分析.性能分析表明,该协议具有较好的安全性.     

基于移动Agent的投保中介的电子商务框架

商业保险的中介一直存在诸多弊端 ,本文讨论了从电子商务角度来解决这一问题的设想 ,并且提出一种基于移动Agent的保险电子商务框架。应用移动Agent来组织保险电子商务的投保业务流程 ,并利用了P3P隐私保护协议来保证隐私安全 ,从而较好地解决了中介弊端的问题     

移动Agent与电子支付研究

移动Agent具有很多传统网络计算模型不具备的优点,很有可能成为一种新的计算方式。特别是随着Internet的迅速发展,许多学者和工业界人士对移动Agent在电子商务中应用的前景非常看好。就移动Agent在电子支付系统中的应用做了初步研究,在Agent系统中增加了有关电子支付的模块,将对其在电子商务中的应用大有益处。     

MASTP协议及其在Aglets平台上的实现

针对移动Agent安全性难以实现的问题,提出把安全电子商务的实现机制融入到对移动Agent的保护上,给出移动Agent的安全传输协议MASTP。通过修改Aglets中的系统函数和引入Cryptix包实现MASTP协议。结果证明,实现MASTP协议的Aglets平台具有系统级的传输安全性,且不会增加软件开发及运行的复杂性。     

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.