网格环境下数据传输模型的研究

深入研究了Globus工具包中数据传输模型的结构、实现细节和特点,在此基础上吸取它的优点,提出了一个新的与Globus工具无关的数据传输模型.该模型立足于为用户提供方便的使用模式,屏蔽系统的异构性,同时也考虑了传输性能和负载均衡等问题.     

雷达情报网格数据传输服务的研究与实现

对以数据交换与共享为目的的雷达情报网格,数据传输是其核心功能.GridFTP是Globus网格计算环境中数据管理的一个通用的数据传输协议.通过对GridFrP协议、Globus Toolkit4和网格编程模型的分析研究,提出一种符合WSRF规范访问GridFTP的方式,以服务调用实现雷达情报网格数据的传输.     

利用网格技术实现校园FTP系统

分析了FTP服务的原理和缺点,给出了一个基于网格的校园FTP系统的设计模型.采用Globus Toolkit的MDS和Grid FTP这两个组件实现了网络资源监测和发现以及网格数据传输机制.     

基于网格的校园FTP系统的研究与设计

本文以传统的FTP服务方式为基础,分析了FTP服务的原理和缺点,给出了一个基于网格的校园FTP系统的设计模型。采用Globus Toolkit的MDS和GridFTP这两个组件实现了网络资源监测和发现以及网格数据传输机制。     

GridFTP服务器的构建与应用

GridFTP是Globus项目组开发的一个用于支持网格远程数据传输的一种基本的数据访问和数据传输协议。在基于Linux的GT3平台基础上,给出了GridFTP服务器配置和测试的步骤,实现了GridFTP服务器的构架;研究了GridFTP第三方控制数据传输的体系结构,描述了第三方控制数据传输过程,给出了第三方控制数据传输的客户端编程实现模式。     

基于网格计算的PBS应用

阐述了作业管理系统PBS与网格计算项目Globus的结合应用技术,提出了相关的资源调度、数据传输、安全认证方面的具体解决方案。     

GridFTP服务器的构建与应用

GridFTP是Globus项目组开发的一个用于支持网格远程数据传输的一种基本的数据访问和数据传输协议。在基于LinuX的GT3平台基础上，给出了GridFTP服务器配置和测试的步骤，实现了GridFTP服务器的构架；研究了GfidFTP第三方控制数据传输的体系结构，描述了第三方控制数据传输过程，给出了第三方控制数据传输的客户端编程实现模式。     

GridFTP多种数据传输模式的设计

GridFTP是Globus项目组开发的一个用于支持网格远程数据传输的一种基本的数据访问和数据传输协议,它支持多种形式的数据传输.研究了并行数据传输、条状数据传输和第三方控制数据传输的传输模式、传输过程,讨论了3种传输模式的适用范围和特点,以及实现并行传输、条状传输的主要代码,最后在第三方控制模式下,结合并行传榆和条状传榆,仿真实现了第三方控制数据传输.     

基于GridFTP的数据传输设计与实现

GridFTP是Globus网格计算环境中数据管理的一个通用的数据传输协议，具有支持GSI的安全机制、三方控制、并行传输等功能。通过对GridFTP协议的分析，描述了三方控制数据传输体系结构，设计了GridFTP客户端控制软件，详细介绍了基于GridFTP数据传输的安全认证、数据传输过程和客户端三方控制数据传输的实现。     

数据网格环境中数据传输服务的研究与实现*

通过对GridFTP作部分修改,实现了独立于Globus环境的、高性能、可靠的数据网格中的数据传输服务,它具有支持基础的安全机制、并行传输、三方传输等功能。剖析了GridFTP,详细介绍了基于GridFTP数据网格环境中的数据传输服务实例。     

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.