Axis实现的Web Services运行概况浅述

Axis本质上是一个SOAP引擎,提供了创建服务器端、客户端和网关SOAP操作的基本框架。但Axis并不仅仅是一个SOAP引擎,它 还是一个独立的服务器,也是一个能嵌入Servlet引擎(例如Tomcat)的服务器,它还支持WSDL。该文通过Axis1.1版本两种调用方式下 SOAPMessage的处理机制,探知其实现Web Services的运行概况。     

基于Rampart实现SOAP消息安全

针对Web Services中日益突出的安全问题,本文将研究Axis2上SOAP消息的安全性,并利用Axis2的安全模块Rampart开发服务端和客户端的安全代码,Web Services应用添加一个WS—Security安全层,通过对SOAP消息的安全处理,实现Web Services的消息级安全。     

基于Axis开发Web服务的研究

Web Services已成为网络应用发展的主流,SOAP协议是Web Services的核心协议。Axis本身是基于Java语言开发的项目,它给出了一个很好的SOAP实现平台,基于它开发Web Services应用省掉了许多底层技术细节,从而使Web服务的开发变得轻松高效。结合图示和应用例子,主要介绍了Axis的工作原理、主要的相关技术WSDL,以及使用Axis时的环境设置、开发和部署Web服务的不同方法。     

Web Services环境下基于私有UDDI的分布式系统研究

针对异构系统间交互性差的问题,研究了如何采用Axis构建一个基于Web Services的分布式信息系统,实现了分布式环境中基于XML的SOAP通信,通过WSDL文件实现服务器端和客户端的信息交互,将具体应用封装为服务的形式并配置私有UDDI服务器,实现服务的动态注册、发现,最终实现分布式环境下的资源共享与协同工作.     

使用X509证书签名加密SOAP消息

将Web Services应用于商业开发,安全性能是必须要考以明文字符的方式在服务和客户之间传递,这样很容易造成信息的泄露和被恶意更改.文中介绍了在.NET平台下如何使用X509证书对SOAP消息进行签名和加密的具体方法,并通过具体实例,讲解了如何将一个使用明文SOAP消息的WebServices和客户端改进成使用X509证书进行签名和加密的服务和客户端调用,以达到安全Web Services的目的.     

使用X509证书签名加密SOAP消息

将Web Services应用于商业开发,安全性能是必须要考以明文字符的方式在服务和客户之间传递,这样很容易造成信息的泄露和被恶意更改.文中介绍了在.NET平台下如何使用X509证书对SOAP消息进行签名和加密的具体方法,并通过具体实例,讲解了如何将一个使用明文SOAP消息的WebServices和客户端改进成使用X509证书进行签名和加密的服务和客户端调用,以达到安全Web Services的目的.     

基于Axis的服务端SOAP处理分析

Web Service是分布式计算领域出现的最新成果.SOAP作为Web Services的核心部分担负了其大部分工作,虽然有集成化的应用,但是目前对其内部处理的研究很少,难以使人对Web Services包含的技术有深入的理解,不利于技术灵活性和细节应用的拓展.本文在深入分析Axis的服务端SOAP处理机制的基础上,对SOAP模型进行讨论,拓展了Axis功能,以便能实现更复杂的处理模型.     

Web Service核心协议与实施研究

本文首先介绍了Web Services、中间件和SCA。着重分析了Web Services的主要协议WSDL和SOAP，及其典型实施Axis，最后指出了Web Services的新规范VVS-Addressing及其带来的挑战。     

基于SOAP构建Axis上的Web Services

Web Services是一种在Internet上进行分布式计算的新思路,它引出了新一代的企业应用集成(Enterprise Application Integration,EAI)的发展.首先分析了传统中间件技术在异构系统集成中所遇到的一些问题,然后介绍了Web Services的体系结构和优点,并在此基础上介绍了Apache Axis框架的组成部分、体系结构以及其处理SOAP消息的流程,并用实例阐述了如何利用Apache Axis开发和使用一个Web Services的全过程.     

Web Service开发

本文以实际项目为例介绍了J2EE中Axis框架下一个Web Service的完整开发过程,包括Axis下Web Service的编写方式和安装部署,基于JDOM的XML操作方法,并给出了以JSP页面作客户端调用Web Service的参考代码.     

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。