移动中间件研究

移动应用系统是移动设备通过无线网络连接固定网络组成的动态分布式系统,它具有设备移动性、间歇网络连接、资源有限性等特征.为了满足移动应用的要求,移动中间件被广泛地应用到移动应用系统,以屏蔽移动性带来的复杂性,提高移动系统的效率.结合移动应用系统的特点,分析了移动中间件的作用和满足的要求,归纳和比较了现有中间技术的特点,讨论了移动中间件的发展趋势.     

基于多主体中间件的移动巡检系统研究

在现有中间件技术和多主体系统的理论基础上,设计了一个多主体中间件模型,论述了该模型的工作流程.在多主体中间件模型的基础上结合移动GIS特点设计了具有客户层、应用层、业务逻辑层和数据层四层结构的移动GIS体系结构.最后结合移动GIS体系结构,设计和实现了移动巡检系统,该系统的实现和应用在一定程度上验证了移动GIS模型的有效性.     

基于分布对象技术的移动中间件

基于JavaRMI技术的移动中间件存在一定程度的局限性。文中以中间件、分布对象计算和移动计算等相关领域的技术为背景,提出了基于分布对象技术的移动中间件MMDO(MobileMiddlewareBasedonDistributedObject),该体系结构包括:动态可定制的基础核心、通用移动Agent平台、异步消息服务、动态资源发现和移动用户安全注册。MMDO能够解决移动中间件研究存在的Java效率问题,同时拓展了移动服务,给移动应用提供更好的支撑环境。最后,给出仿真测试结果,证明了MMDO的有效性。     

分布式计算技术介绍

作为使用低成本的硬件来达到高性能计算机性能的一项技术,分布式计算技术近年来发展迅速,并且在科研、数据搜索、复杂数据计算等方面发挥了重要作用,如:中间件技术；P2P技术；移动Agent技术；网格技术；云计算；Web Service等,这里介绍这些技术和国内外应用情况.     

中间件技术在移动增值领域的设计与实现

中间件是构件化软件的一种表现形式,中间件抽象了典型的应用模式.以一个移动增值平台为例,阐述构件化中间件系统的基本技术及在移动增值领域的应用.通过移动中间件在实际应用系统的具体设计与模块实现,设计一种基于数据库为中介的通用移动增值服务平台,并具体分析中间件满足快速开发和增强系统稳定性的优点,以及在增值领域开发还需要关注的问题.阐述了用移动中间件建立通用移动增值服务系统的必然性.     

一种基于BREW的移动中间件解决方案

全面介绍了一种基于BREW的移动中间件解决方案,它针对移动设备的特性,将MICO技术与BREW技术相结合,使移动数据应用之间及它们与Internet、普通桌面系统之间实现互联、互通和互操作。     

当移动互联遇上云计算

公司介绍：烽火星空是烽火通信科技股份有限公司的下属公司,主要从事专业行业产品以及移动信息化产品的研发、销售、技术咨询与实施,在移动信息化行业应用、手机客户端开发、移动应用中间件、通信中间件、无线数据采集、ICT应用开发与集成等领域拥有技术专长。     

面向多终端适配的移动中间件的设计与实现

随着3G技术的应用和推广,手机游戏、动漫、音频、视频等应用成为手机增值业务的重要发展方向.而现有的手机应用普遍存在两方面的问题:一是应用的开发比较复杂,需要面对不同的应用逻辑;二是手机应用需要支持各种不同的手机终端,适配工作量巨大.因此,本文在传统中间件、移动中间件思想的基础上,提出一种面向多终端适配的移动中间件的架构...     

面向云服务的上下文感知自适应移动中间件

近年来,随着苹果、黑莓等智能移动设备的日益普及,以及云计算在运算、存储能力等方面展现的优势,基于云计算的移动应用越来越得到人们的关注.然而,由于移动环境下有限的电池能量,不稳定的无线网络以及实时变化QoS水平,使得现有的中间件技术不能很好地满足移动终端访问云服务的要求.为此,提出一种面向云服务的上下文感知自适应移动中间件,该中间件通过监视移动设备的资源和上下文,动态发现和自适应云服务.此外,将一种基于模糊认知图的模型应用到自适应策略中,提高了自适应算法的效率和性能.最后,通过实验和仿真来验证该中间件的有效性.     

具有动态适应能力的移动应用中间件研究与设计

由于移动终端硬件以及操作系统的多样性,研究了如何解决移动应用的适应性和实现敏捷开发的问题。讨论当前解决移动应用适应性的4种思路,提出移动应用中间件的设计与部署模式。描述了中间件功能设计与实现技术,通过多个项目的实施表明,设计的中间件能较好地解决移动应用的终端适应性,极大提高了应用开发和部署效率。最后指出了下一步的研发计划。     

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。     

基于QTE的蒙古文显示机制研究与实现

蒙古语言是中国蒙古族使用的通用语言,由于蒙古文区别于其他文字的书写方式和其自身变形机制等特点,在很多通用的文字处理引擎中都不被支持。在嵌入式产品开发与应用领域中Linux加QTE已经成为流行方式。该文给出了一种在QTE环境上实现基于标准Unicode的蒙古文点阵显示和变形算法, 并自定义了支持蒙古文的QTE组件,扩展了QTE功能,为在Linux加QTE方式的嵌入式体系结构中处理蒙古文提供了一种解决方法。