Ajax技术及其DWR框架实现

作为Web2.0技术中的典型代表,Ajax发展并强化了传统Web应用程序忽视的表示层,改善了基于Web应用的交互方式和用户体验,使得异步的概念贯入了Web应用之中.越来越多的Web应用程序采用Ajax机制实现,但Ajax的代码凌乱、难以管理、代码重用率低、缺少OO思想等问题使得Ajax技术应用受到阻碍.本文论述了Ajax技术的基本原理以及使用DWR框架简化Ajax实现.     

基于Ajax的旅游景区服务质量智能评价系统开发

针对现有信息系统在智能评价方面的薄弱之处,该文设计了一个基于Ajax的旅游景区服务质量智能评价系统.在分析Ajax技术的应用框架和构造原理的基础上,进行了智能评价系统的内部功能设计.系统采用B/S+C/S构架,并应用Ajax技术实现了浏览器和服务器之间的异步通信,很好地解决了浏览器阻塞问题.     

AJAX技术在远程教育系统中的应用

针对采用请求/响应交互模式的远程教育平台不能实现异步通讯的问题,分析了Ajax技术的原理及其关键技术,并采用Ajax技术设计和实现了一个远程教育系统,实验表明,基于Ajax技术的应用提高了交互式教学的响应速度。     

Ajax技术概述

Ajax技术是JavaScript、XML等多种技术的综合,允许WEB页面在不刷新整个页面的情况下与服务器进行通信.采用Ajax技术的站点可以更灵活的响应用户的请求,Ajax技术已经取得了广泛的应用.本文主要对Ajax的关键技术予以分析.     

基于Ajax和Servlet实现无刷新动态Web应用

针对传统Web应用中浏览器和服务器频繁交换数据刷新页面导致执行速度慢问题.简要分析了Ajax框架下的WEB应用模式和传统Web应用模式的区别,并阐述了Ajax技术的核心概念及实现机制,提出一种基于Aiax和Servlet实现无刷新、按需取数的完整Web应用框架.     

基于ArcIMS与Ajax的WebGIS应用研究

介绍Ajax技术及其实现原理、ArcIMS的体系结构和工作原理,提出基于ArcIMS与Ajax的WebGIS的方案,并将该方案应用于网吧监控系统的开发。实验表明,综合运用Ajax的异步机制以及Ajax与ArcIMS的混合缓存技术实现的WebGIS,较好地实现浏览器与地图服务器之间的异步交互,均衡了服务器和客户端的负载、提高了用户体验,使整个WebGIS的性能达到最佳状态。     

基于SVG和Ajax的WebGIS设计与实现

针对当前WebGIS两种实现方案的缺点:基于服务器端的WedGIS交互性差;基于客户端的WehGIS对客户端要求过高,负载过重,文中详细分析了采用SVG和Ajax技术的原因和可行性,并概述了它们的技术特点,在此基础上提出了基于SVG和Ajax的WebGIS体系结构,设计了存储SVG的关系数据库表结构.以广东省空间信息共享服务平台项目为实验载体,实现了WebGIS的地图显示、图形编辑、图层控制和空间统计分析等功能.具有响应速度快等特点.     

Ajax技术在EXT框架与MVC模式整合中的应用

分析了传统WEB系统的局限性,介绍了Ajax技术及工作原理。员工通讯录管理系统采用EXT框架和MVC模式相结合,使用Ajax技术实现了员工管理系统,克服了传统WEB的弊端,实现了界面友好,降低了开发成本,减轻了服务器端的压力,提高了系统的响应速度,减少了使用者的等待时间,使用户感受到使用Ajax技术与EXT框架与MVC模式相结合的优越性。     

JSP与Ajax在Web系统视图层上的性能对比分析

对JSP和Ajax这两种技术的工作机制进行了对比，并使用网络压力测试工具Webserver Stress Too17对视图层分别采用JSP和Ajax的实验系统进行了性能对比测试。实验数据证明，Ajax技术在开发Web系统视图层上相比JSP，使系统在网络数据流量、系统响应时间方面有了较大的改善。     

基于Ajax技术的网上家园系统的设计和开发

Ajax模式作为Web 2.0标准核心之一,利用在客户端建构中问层,实现了页面表现与应用逻辑的分离,并且支持B/S环境下用户操作与服务器响应的异步化。该文在简要阐述了Ajax模式的核心概念、体系结构和异步交互机制的基础上,通过基于Ajax模式的网上家园系统的设计和开发,体现了其在异步交互Web环境中的框架结构,逻辑组织和在改善网络带宽、优化用户体验等方面均优于传统Web模型。     

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.