基于嵌入式WEB的AllLightSYS的设计实现

HTTP协议是目前流行的Web技术的主要协议,是Web浏览器和Web服务器之间进行通信的基础。本文首先对嵌入式系统从整体上进行了简析,说明了嵌入式系统不同于通用型计算机系统的特点和嵌入式系统应用的广泛性。然后从协议的角度出发论述了HTTP协议。最后介绍了一个基于嵌入式Web技术的AllLightSYS系统的设计与实现,重点阐述嵌入式服务器软硬件部分的设计思想和体系架构,并对关键技术进行了详细的介绍。     

基于单片机的嵌入式WEB服务器的研究

介绍了Web服务器的技术及原理,其中包括HTTP协议和CGI原理。讨论了在无操作系统单片机环境中开发嵌入式Web服务器,CGI是用户与Web服务器交互的唯一可行途径。并给出了该系统的设计思想,对硬件设计进行了具体的阐述。     

基于单片机的嵌入式WEB服务器的研究

介绍了Web服务器的技术及原理,其中包括HTTP协议和CGI原理.讨论了在无操作系统单片机环境中开发嵌入式Web服务器,CGI是用户与Web服务器交互的唯一可行途径.并给出了该系统的设计思想,对硬件设计进行了具体的阐述.     

低端嵌入式设备Web服务器的研究与实现

针对低端嵌入式设备的特点，对嵌入式Web服务器进行了研究，根据嵌入系统的功能需求对HTTP协议的一些机制进行了简化，讨论了客户端请求数据报文的解析和服务器应答数据报文的封装技术，设计与实现了一个无操作系统支持的嵌入式Web服务器。     

基于嵌入式Web服务器的远程控制系统

随着计算机和计算机网络技术的迅速发展，基于TCP／IP协议的远程控制网络已成为控制领域发展的一个重要方向。本文选择了基于嵌入式Web服务器的远程控制网络。在ARM开发板上开发了嵌入式Web服务器。通过嵌入式Web服务器可以把被控设备接入Intemet／Intranet网络，最后对ARP，IP，TCP，HTTP等协议进行了分析和裁减，完成一个功能完善的精简协议栈的设计，以适应本系统的特点。     

基于Linux嵌入式HTTP网络服务器的设计与实现

介绍了基于PXA250和Linux嵌入式HTTP网络服务器的硬件、软件设计与实现。描述了基于PXA250嵌入式系统硬件设计原理，多进程和多线程并发连接嵌入式HTTP网络服务器软件算法和程序没计。程序设计基于HTTP，协议作为软件开发的基础，主要包括3个关键内容：一个标准HTML页的发送和接收，客户端向嵌入式HTTP网络服务器发送Web表单请求时的通信和CGI接口程序。探讨了多个线程共享数据资源，并且安全可靠地工作。用互斥锁和条件变量技术解决了由并发产生的同步问题。     

嵌入式Web服务器软件的设计和实现

针对当前嵌入式Internet技术已成为嵌入式系统发展的新技术热点的情况，讨论了嵌入式设备接入Internet的方法，论述了实现嵌入式Web服务器的关键技术——HTTP协议和通用网关接口CGI，阐述了嵌入式Web服务器的特点及其设计思想，最后提出并在VxWorks实时操作系统环境下实现了的一种嵌入式Web服务器的方案，并给出了该嵌入式Web服务器的数据处理流程以及其主要模块和功能说明。     

嵌入式浏览器中Cookie技术的实现

Cookie是HTTP协议的状态管理机制。Cookie可以大大扩充基于Web的客户／服务器应用程序的能力，目前Cookie技术已经广泛地应用于Internet。嵌入式浏览器是许多嵌入式系统的重要支撑软件，嵌入式浏览器实现对Cookie的支持可以增强嵌入式系统的功能。介绍了Cookie的作用，分析了Cookie的运行机制，结合嵌入式系统的特点，重点阐述了Cookie技术在嵌入式浏览器JIBrowser中的具体实现。     

嵌入式Internet技术的研究与实现

对用嵌入式Web服务器技术在嵌入式设备中实现HTTP服务时的底层支持协议TCP/IP协议栈的精简进行了研究,主要从对TCP/IP协议栈中选用的协议进行精简着手,在实验室环境下对精简后的HTTP协议模块、ICMP协议模块进行了测试,达到了预期目的,并给出了HTTP协议精简后的程序处理方法.     

基于ARMLinux新型嵌入式Web服务器设计

为了满足当前工业控制和家用电器远程测控的要求,通过比较常用的嵌入式服务器技术并分析了嵌入式服务器的实现原理,设计了一种全新的Web服务器.详细介绍了这种基于ARMLinux嵌入式Web服务器的设计方案,阐述了系统的软硬件设计.针对嵌入式服务器的实际和应用场合,提出了HTTP协议与动态链接库相结合的解决方案.该Web服务器支持动态链接库,代码小、实时性好.测试结果表明方案可行、实用.     

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。     

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.     

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。     

基于AD9626的模拟信号采集存储卡设计

自然界的绝大部分信号都是以模拟的形式存在,因此模拟信号的采集转换存储在数字时代十分关键。文章讨论了在雷达信号处理领域基于AD9626的AD采集存储卡的设计原理、硬件结构和程序设计与芯片配置等问题,为今后相关领域的研究提供了可参考的方案。     

A human-computer interface for non-computer specialists

The COM teleconferencing system was designed to be easy to use for both beginners and people with much computer experience. A number of design choices in organizing the human-computer interface were considered very carefully. These design problems are not unique for teleconferencing applications, but will appear in many other developments of human-computer interfaces for non-computer specialists. This report discusses naming conventions, menu format, user commands, help facility and the treatment of ‘type ahead’ from the users.     

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.     

View-based model-driven architecture for enhancing maintainability of data access services

In modern service-oriented architectures, database access is done by a special type of services, the so-called data access services (DAS). Though, particularly in data-intensive applications, using and developing DAS are very common today, the link between the DAS and their implementation, e.g. a layer of data access objects (DAOs) encapsulating the database queries, still is not sufficiently elaborated, yet. As a result, as the number of DAS grows, finding the desired DAS for reuse and/or associated documentation can become an impossible task. In this paper we focus on bridging this gap between the DAS and their implementation by presenting a view-based, model-driven data access architecture (VMDA) managing models of the DAS, DAOs and database queries in a queryable manner. Our models support tailored views of different stakeholders and are scalable with all types of DAS implementations. In this paper we show that our view-based and model driven architecture approach can enhance software development productivity and maintainability by improving DAS documentation. Moreover, our VMDA opens a wide range of applications such as evaluating DAS usage for DAS performance optimization. Furthermore, we provide tool support and illustrate the applicability of our VMDA in a large-scale case study. Finally, we quantitatively prove that our approach performs with acceptable response times.     

Call for papers Special issue on Modeling and control technologies for civil,energy,and power systems

正The control of civil,energy,and power systems presents significant new challenges for modeling and control theory.The purpose of this special issue is to provide a forum for researchers and practical engineers to discuss the recent advances in modeling and control technology development for civil,energy,and power systems.Prospective authors are invited to submit their original contributions with the focus on theory or applications of modeling,control     

Information for Authors

正http://www.zju.edu.cn/jzus http://www.springerlink.com Aim The Journals of Zhejiang University-SCIENCE(A/B/C)are edited by the international board of distinguished Chinese and foreign scientists,and are aimed to present the latest developments and achievements in scientific research in China and overseas to the world’s scientific circles,especially to stimulate and promote academic exchange between Chinese and foreign scientists everywhere.