基于Web应用系开发的纯Java实现技术

针对当前基于Ｗｅｂ应用系统开发中流行的三层浏览器／服务器模型,给出了系统的纯Ｊａｖａ技术实现。包括用户服务层的Ｊａｖａ、Ａｐｐｌｅｔ技术、应用服务层的Ｊａｖａ、Ｓｅｒｖｌｅｔ技术、用户服务层与应用服务层的通信技术和应用服务民数据服务层的ＪＤＢＣ通信技术。     

Java Card程序设计(二)

ＪａｖａＣａｒｄ程序设计（二）清华大学计算机系（１０００８４）徐鹏马群生王克宏接上期）３ＪａｖａＣａｒｄ程序设计下面介绍如何使用ＪａｖａＣａｒｄ２．０ＡＰＩ来编写针对智能卡技术的ＪａｖａＡｐｐｌｅｔ程序。３．１Ｊａｖａ子集Ｊａｖａ智能卡是一种新型的程...     

Java产品简介(二)

Ｊａｖａ产品简介（二）Ｊａｖａ开发工具集１．１Ｊａｖａ平台实现了Ｉｎｔｅｒｎｅｔ和Ｉｎｔｒａｎｅｔ应用程序开发与部署的革命，提供了新型网络计算模型。它的先进功能可以通过Ｊａｖａ开发工具集（ＪＤＫ）实现。Ｊａｖａ开发工具集是一组构件，包括基本开发工具和...     

IBM与Sun将合作提高Java媒体技术

ＪａｖａＭｅｄｉａＦｒａｍｅｗｏｒｋ２．０将为多媒体应用开发人员提供轻松愉快的工作环境。ＩＢＭ和Ｓｕｎ公司日前正式发布联合开发ＪａｖａＭｅｄｉａＦｒａｍｅｗｏｒｋ２．０的协议。ＪａｖａＭｅｄｉａＦｒａｍｅｗｏｒｋ作为多媒体应用编程接口（ＡＰＩ）与技术家族的一部分,对Ｊａｖａ平台进行了扩展,为开发人员提供了增强的媒体开发能力,使声频流与视频流等流媒体能够容易地应用于企业应用中。目前,这一强劲的Ｊａｖａ媒体技术已经得到用户的广泛好评。根据双方的合作协议,ＪａｖａＭｅｄｉａＦｒａｍｅｗｏｒｋ２．０将进…     

Java产品简介(五)

Ｊａｖａ媒体与通信应用编程接口Ｊａｖａ媒体与通信应用编程接口扩展了Ｊａｖａ平台，实现了丰富多彩的媒体内容与高级通信功能的集成化。丰富多彩的媒体与增强通信相结合Ｊａｖａ媒体与通信应用编程接口由一组类库组成，它们运用完善的媒体和通信功能丰富了Ｊａｖａ应用...     

Java嵌入式技术面面观(二)

Ｊａｖａ嵌入式技术面面观（二）￥清华大学电子系微电子专业＠徐剑军￥清华大学计算机系＠马群生＠王克宏Ｊａｖａ嵌入式技术面面观（二）清华大学电子系微电子专业（１０００８４）徐剑军清华大学计算机系（１０００８４）马群生王克宏（接上期）ＪａｖａＣａｒｄ所用的Ｊａｖ...     

Java信息集锦

Ｊａｖａ信息集锦Ｓｕｎ推出Ｊａｖａ密码扩展软件包近日，Ｓｕｎ公司推出Ｊａｖａ密码扩展软件包的最新版本（ＪＣＥ１．２）。Ｊａｖａ密码扩展软件包，是成套的Ｊａｖａ开发工具软件（ＪＤＫＴＭ）的标准扩展，是一种综合性的密码工具箱，它可为先进的基于Ｊａｖａ软件...     

电脑文摘

９９０５３Ｊａｖａ战胜Ｃ／Ｃ＋＋的奥秘－从语言和实现机制角度剖析Ｊａｖａ与Ｃ／Ｃ＋＋／／微型机与应用．－１９９９（３）－３１～３３本文针对Ｊａｖａ语言与Ｃ／Ｃ＋＋语言在功能、安全性、可移植性等方面各自不同的特点进行了技术分析,同时还展望了Ｊａｖａ语言的发展前景。９９０５４多媒体技术的发展现状与趋势／／微型电脑应用－１９９９（３）－６～１０数字化和协同化是多媒体技术的主要发展趋势。前者的发展包括多媒体数据库技术的发展、多媒体信息检索技术和多媒体搜索引擎技术的发展。多媒体信息发布和出版技术（包括电于…     

企业JavaBeans的初级指南：JAVA服务器—侧应用组件标准的概述

初始的ＪａｖａＢｅｎａｓ的定义描述了主要运行在客户侧的客户／服务器系统之上的Ｊａｖａ组件的行为和属性,企业ＪａｖａＢｅａｎｓ的１．０版本的定义更改这种情况,企业ＪａｖａＢｅａｎｓ是为创造可扩展的,多功能的,分布的应用提供的组件体系结构,而且它让创建动态的、可扩展的应用服务器成为可能。最后业界都表现对企业ＪａｖａＢｅａｎｓ（ＥＪＢ）技术的关注,开始制定计划去实施这种基本的组件,自从１９９８年３月企业     

Java的中文开发与应用

介绍用Ｊａｖａ实现中文的意义、Ｊａｖａ系统与其他系统的区别并结合四通利方信息技术有限公司的几个Ｊａｖａ中文应用产品，介绍了Ｊａｖａ的中文开发与应用技术。     

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.