活动预测模型驱动的Web 服务合成

Web 服务工作流被描述成一系列活动的组合,Bonita 提供的流程引擎可以验证产生Web 服务工作流Bonita 基于活动预测模型的基础性构造,实现了流程中活动可预测执行的功能,它使用SOAP 和XML数据绑定技术的Web Services 封装了已有的工作流业务方法并将它们以基于J2EE 的Web Services形式发布。基于活动本体的预测模型使得工作流不再是传统意义上的顺序执行,而是可以实现执行预测,使得Web 应用无论在功能上还是互操作性方面都得到加强;这种机制使得工作流的合成适应Web服务动态     

Web服务组合引擎的研究与实现

随着电子商务和B2B应用的发展和需求的加深,企业应用系统要求可以在因特网环境下进行企业间的应用互操作和应用集成,要求能够依据新的需求,快速、灵活地集成各种已有的和新添置的业务应用系统,并使得它们可以有机地协同提供服务.Web服务的动态组合为解决信息共享和应用协作的瓶颈问题带来了新的方案.引入了工作流技术,使用Petri网表示工作流模型,将工作流和Web服务技术组合起来,设计并实现了一个面向Web服务组合语言的通用的Web服务组合引擎.     

基于动态有色Petri网的网格服务工作流模型的研究

在深入了解网格技术、网格服务和网格工作流的概念、特点及其应用的基础上,提出了一种可行的网格服务工作流系统模型,重点介绍了动态优化建模技术、动态调度算法的实现思想.定义了一种动态有色Petri网作为服务工作流的建模工具,支持服务工作流的动态优化建模和动态调度,并为服务工作流模型提供性能评价依据.验证表明采用该模型能够很好地满足用户的QoS要求,并且有助于提高资源利用率.     

基于生物实体分布感知的E-service工作流突现研究

基于生物网络平台,提出了一种E-service工作流突现方法.生物实体(具有免疫行为的移动Agent)代理E-service,构成一个自治的单元,通过分布感知确认服务关系,生物实体协商和演化完成了E-service工作流组合.采用服务相对质量的矩阵,准确地描述服务和工作流关系和E-service相对质量,最优E-service工作流组合的建立转化为带约束的最优化问题,并给出不带参数的罚函数动态演化算法解决方案.仿真表明,这种方法提高了适应性和性能.     

基于工作流模板的Web服务组合模型研究

服务组合是Web服务应用的一个重要研究方向,利用工作流与服务组合的相似性,提出了一种基于工作流模板的Web服务组合模型;该模型利用功能语义在服务匹配上的优点,对流程、服务进行较为准确的查询;并通过Agent技术来执行组合方案;最后结合服务发布算法,将组合后的服务和流程发布在注册库中.     

基于工作流的电信业务开发系统模型

随着Web服务技术的发展,Web服务已经成为集成电信网、移动网、互联网上分布和异构应用的通用技术。基于流程的Web服务组合语言未考虑业务规则的分离,不支持流程中不确定的动态部分的抽象和封装,因此该文提出了将规则系统应用到工作流中的业务开发系统模型,从而为服务提供商进行电信新业务开发和生成提供了快速有效的途径。     

基于工作流的Web 服务组合模型设计与实现

单个Web服务无法满足企业的应用需求,对多个Web服务进行组合的研究尤为必要。本文提出了一种基于 工作流模板的服务组合模型,旨在通过定义和发布静态的Web服务,搭建基于工作流的Web 服务业务流程组合模型,实现在 工作流流程中调用静态的服务组合。     

基于OWL-S的动态工作流模型

结合Web服务的特点,将Web服务组合视为Web服务的工作流,根据BPEL过程模型将OWL-S/UDDI协调器应用到Web服务的工作流的构造当中.基于本体论提出了一种OWL-S的动态工作流模型,该模型有机地将Web服务和动态工作流结合在一起,不仅增强了模型的灵活性、适应性,同时也使其具有较强的扩展性.在此基础上以一个申请银行贷款为例表明了该模型的可行性.     

Web服务组合工作流中扩展UDDI的设计与实现

将多个Web服务组合起来,并按照一定的工作流程顺序执行从而形成Web服务组合工作流,是目前Web服务及工作流发展的趋势.然而如何描述Web服务来提高Web服务工作流的执行效率成为一个非常迫切的问题.提出了一个Web服务的语义表示模型,并且在此基础上提出一个Web服务组合工作流系统模型,然后详细描述了此模型中扩展UDDI的设计与实现.     

基于语义描述的Web服务工作流动态组合研究

传统静态工作流很难适应动态的、灵活的现代业务流程。近年来Web服务技术不断发展，使得工作流中的活动以Web服务形式的实现，而且工作流本身也可以以Web服务的形式被调用，特别是语义Web技术的发展，为计算机实现自动Web服务工作流提供了可能。本文基于本体论提出了一个半结构化工作流本体模型，并在此基础上设计了基于Agent技术的Web服务工作流系统。     

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。